CN115267532A - A motor system detection method, electronic device and computer-readable storage medium - Google Patents

Abstract

The embodiment of the application provides a motor detection method, electronic equipment and a computer readable storage medium, wherein the method comprises the following steps: classifying the early warning signals of the functional module and the motor system in advance; receiving early warning signals sent by the functional module and the motor system; and executing a protection action according to the grade of the early warning signal. Implement above-mentioned embodiment, can carry out intelligent protection to motor system in the testing process to motor system, prevent to reduce detection efficiency because excessive protection, also avoid causing the harm because protect improper to motor system.

Description

A motor system detection method, electronic equipment and computer-readable storage medium

technical field

The present application relates to the field of motor technology, and in particular, to a motor system detection method, electronic equipment, and a computer-readable storage medium.

Background technique

After the motor system is manufactured, performance testing is required. The existing motor system testing laboratory scheme mainly has two levels of safety protection: 1. Motor controller protection. , limit the torque range, speed range, stator and rotor temperature range and other parameters of the motor, and limit and protect the output torque and speed of the motor according to different fault levels; 2. The upper computer control program protection of the motor detection system, by reading the motor Parameters such as motor torque, speed, bus voltage value, current value, and stator and rotor temperature on the controller, and then set a reasonable protection threshold through the host computer. When the parameters of the motor and the motor controller exceed the threshold, the bench will stop running. This method is less intelligent, and it is difficult to fully protect the motor system.

Contents of the invention

The purpose of the embodiments of the present application is to provide a motor system detection method, electronic equipment, and a computer-readable storage medium. By classifying early warning signals and performing different protection actions according to the classification, the motor system can be monitored during the detection process of the motor system. Carry out intelligent protection to prevent the detection efficiency from being reduced due to excessive protection, and also avoid damage to the motor system due to improper protection.

In the first aspect, the embodiment of the present application provides a motor system detection method. The motor detection system is used to detect the performance of the motor system and is applied to the motor detection system. The motor detection system includes: a control module and a function module The functional module is connected to the motor system, and the control system is connected to the functional module and the motor system; the method includes:

Classifying the warning signals of the functional modules and the motor system in advance;

receiving an early warning signal sent by the functional module and the motor system;

determining the level of said warning signal;

Protective actions are performed according to the level of the early warning signal.

In the above implementation process, different from the existing technology, the early warning signals of the functional modules are classified, and different protection actions are executed according to the classification, so that the motor system can be intelligently protected during the detection process of the motor system to prevent excessive Protection reduces the detection efficiency and avoids damage to the motor system due to improper protection.

Further, the step of performing protection actions according to the level of the early warning signal includes:

Determine the current fault flag according to the level of the early warning signal;

determining the current fault level according to the current fault flag;

The protection action is executed according to the fault level.

Further, the fault flags include: a flag for a first-level fault alarm, a flag for a second-level fault alarm, and a flag for a third-level fault alarm;

The step of determining the current fault level according to the current fault flag bit includes:

The failure class is determined by the following formula:

E-Motor Lab_Error_Flag = 0×Y ₀ +1×Y ₁ +2×Y ₂ +4×Y ₃ ;

Wherein, E-Motor Lab_Error_Flag is the fault level, wherein, Y ₀ is no fault flag; Y ₁ is the flag of the first-level fault alarm; Y ₂ is the flag of the second-level fault alarm; Y ₃ is the third-level fault Alarm flag.

Further, the early warning signal includes: a first-level early warning signal and a second-level early warning signal;

The step of determining the current fault flag according to the level of the early warning signal includes:

Responding to at least one first-level early warning signal, confirming that the flag bit of the first-level fault alarm is 1;

Responding to at least one secondary warning signal; confirming that the flag bit of the secondary fault alarm is 1.

Further, the early warning signal also includes: a three-level early warning signal;

The three-level early warning signal includes: a fire alarm signal and other three-level early warning signals;

The step of determining the current fault flag according to the level of the early warning signal also includes:

In response to the fire alarm signal and at least one of the three-level early warning signals, confirm that the flag bit of the three-level fault alarm is 1.

Further, the functional module includes: a battery simulator connected to the control module;

A motor system detection device connected to the control module;

The motor system environment box is connected with the control module;

The step of performing the protection action according to the fault level includes:

When the failure level is 1, the dynamometer that controls the motor system detection equipment maintains the speed control mode;

controlling the motor system to maintain a torque control mode;

controlling the dynamometer to drop to 0 at a first rate within a first time;

controlling the electric motor system to reduce output torque to zero at a second rate;

The motor system environment box is controlled to restore the temperature inside the box to the first temperature at a third rate.

Further, the functional module includes: a high-voltage transfer box connected to the motor system;

The step of performing the protection action according to the fault level also includes:

When the fault level is 2, the frequency converter controlling the dynamometer is converted into an emergency stop mode;

controlling the rotational speed of the dynamometer to decrease at a fourth rate for a second time;

The frequency converter controlling the dynamometer is converted into a free stop mode;

controlling the battery simulator to stop outputting, and cutting off the high-voltage output of the battery simulator within a third time when the output DC bus voltage is lower than a safe voltage;

controlling the high-voltage transfer box to cut off the output of the high-voltage relay within a fourth time after the DC bus voltage drops to a safe voltage;

Controlling the motor system environment box to return to the second temperature at a fifth rate, delaying shutdown for a fifth time;

Responding to the signal that the rotational speed of the motor system is 0, delaying for a sixth time to cut off the low-voltage control power supply of the motor system.

Further, the functional module includes: an exhaust system, and the control module is connected to the exhaust system;

The step of performing the protection action according to the fault level also includes:

When the failure level is 3, control the exhaust system to automatically open;

Control the dynamometer inverter to switch to emergency stop mode

The dynamometer speed decreased at the sixth rate and held for the seventh time;

controlling the frequency converter to switch to a free stop mode;

controlling the battery simulator to stop outputting, and cutting off the high voltage output of the battery simulator within the eighth time when the output DC bus voltage is lower than the safe voltage;

When the DC bus voltage drops to a safe voltage, cut off the high-voltage relay output of the high-voltage transfer box within the ninth time;

Controlling the shutdown of the battery simulator;

Control the motor system environment box to open the gas fire extinguishing system;

After the rotation speed of the motor system decreases to 0, the low-voltage power supply of the motor system is cut off after a tenth time delay.

In the second aspect, an electronic device provided by an embodiment of the present application includes: a memory, a processor, and a computer program stored in the memory and operable on the processor, and the processor executes the computer program When implementing the steps of the method described in any one of the first aspect.

In a third aspect, an embodiment of the present application provides a computer-readable storage medium, where instructions are stored on the computer-readable storage medium, and when the instructions are run on a computer, the computer is made to perform any of the tasks described in the first aspect. one of the methods described.

Other features and advantages disclosed in the present application will be described in the subsequent description, or some of the features and advantages can be deduced or unambiguously determined from the description, or can be known by implementing the above-mentioned technology disclosed in the present application.

In order to make the above-mentioned purpose, features and advantages of the present application more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings that need to be used in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, so It should not be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings according to these drawings without creative work.

Fig. 1 is the structural diagram of the motor detection system that the embodiment of the present application provides;

FIG. 2 is a schematic flow diagram of a motor system detection method provided in an embodiment of the present application;

FIG. 3 is a schematic flow diagram of performing protection actions according to the level of the early warning signal provided by the embodiment of the present application;

FIG. 4 is a schematic flow diagram of performing protection actions according to the fault level provided by the embodiment of the present application;

FIG. 5 is another schematic flowchart of performing protection actions according to fault levels provided by the embodiment of the present application;

FIG. 6 is another schematic flowchart of performing protection actions according to fault levels provided by the embodiment of the present application;

FIG. 7 is a structural diagram of an electronic device provided by an embodiment of the present application.

Reference numerals: 1-host computer control system of motor detection system; 2-safety control system of motor detection system; 3-motor system detection equipment; 4-battery simulator; 5-high voltage transfer box; 6-motor system environment box; 7-cooling circulating water machine; 8-fire extinguishing system; 9-exhaust system; 10-motor system; 11-fire sound and light alarm; 12-laboratory control logistics door; 13-laboratory control gate.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

Example 1

Referring to FIG. 1 , an embodiment of the present application provides a motor detection system. The motor detection system is used to detect the performance of the motor system. The motor detection system includes: a control module and a function module; the function module is connected to the motor system, The control system is connected to the functional module and the motor system;

Among them, the control module includes: the host computer control system of the motor detection system and the safety control system of the motor detection system; Fire extinguishing system, exhaust system.

Optionally, the motor testing system is installed in the testing laboratory. Referring to FIG. 1 , the laboratory further includes: a laboratory control flow gate 12 and a laboratory control gate 13 .

The functions of each module are as follows: Motor detection system upper computer control system 1: Communication and control of process test parameters with motor system detection equipment, battery simulator, motor system environment box, cooling circulating water machine and other equipment through industrial Ethernet, through The CAN communication form communicates and controls the motor and motor controller parameters with the motor system to realize the performance and calibration test of the motor system. Communicate and control safety parameters with the safety control system of the motor detection system, collect the first-level alarm signals of the motor system detection equipment, battery simulator, motor system environment box, cooling circulating water machine and motor system, and control the above test equipment according to the motor The first-level fault handling process of the detection system is carried out. Motor detection system safety control system 2: Communication and control of safety parameters with the upper computer system of the motor detection system, collection of motor system detection equipment, battery simulator, motor system environment box, cooling circulating water machine, laboratory door proximity switch, fire protection Control the secondary alarm signal and the tertiary alarm signal of the system, and control the motor system testing equipment, battery simulator, motor system environment box, cooling circulating water machine, fire extinguishing system, and exhaust system according to the secondary faults and faults of the motor detection system The three-level fault handling process works. 3 Motor system testing equipment: mainly composed of dynamometer, frequency converter, torque sensor, high-speed transmission shaft system, data acquisition system, CAN communication board, EtherCAT communication board, three-way vibration sensor, main control computer and other equipment. The dynamometer is mechanically connected to the motor system through a high-speed drive shaft system and a torque transducer. The main control computer sends control instructions to the frequency converter, and the frequency converter controls the speed of the dynamometer through vector control. For general motor system performance calibration test conditions, the motor system is tested with the torque loop as the control target, and the dynamometer system is tested with the speed loop as the control target. The motor system detection equipment transmits the primary alarm signal of the equipment to the upper computer control system of the motor detection system through the CAN communication method, and transmits the secondary alarm signal of the equipment to the safety control system of the motor detection system through the EtherCAT communication method. Battery simulator 4: The DC output cable of the equipment is directly connected to the positive and negative poles of the busbar of the drive motor controller, and communicates with the motor system through the host computer control system to realize the calibration performance test of the motor system. Through Ethernet communication, the first-level alarm value of the battery simulator can be reported to the host computer control system of the motor detection system, and the second-level and third-level alarm signals can be fed back to the safety control system of the motor detection system. High-voltage transfer box 5: mainly composed of high-voltage relays and CAN communication circuits. The input end of the high-voltage transfer box is the output end of the DC bus connected to the battery simulator, and the output end of the high-voltage transfer box is the input end of the high-voltage bus connected to the motor controller. The remote on-off of the high-voltage relay can be realized by the upper computer control system of the motor detection system. Motor system environmental chamber 6: used to simulate the high and low temperature damp heat test environment during the motor system test process, the temperature and humidity parameters of the environmental chamber can be set through the upper computer control system of the motor detection system, and a part of the motor system environmental chamber can be connected through EtherCAT The first-level alarm value is reported to the host computer control system of the motor detection system, and the second-level alarm signal is fed back to the safety control system of the motor detection system. Cooling circulating water machine 7: Provide coolant to the motor system during testing, and ensure that the motor system works under different test conditions by controlling the temperature and flow of the coolant. At the same time, the cooling circulating water machine communicates with the upper computer control system of the motor detection system and the safety control system of the motor detection system. The first-level alarm number can be fed back to the upper computer control system of the motor detection system, and the second-level alarm signal can be fed back to the safety control of the motor detection system. system. Fire extinguishing system 8: mainly consists of fire control system, smoke detector, temperature detector, fire sound and light alarm 11, fire gas pipeline, gas nozzle, fire extinguishing system automatic start button, fire extinguishing system manual start ball valve When the motor detection system triggers a three-level alarm, the safety control system of the motor detection system controls the start of the gas fire extinguishing system. When the automatic start of the system fails, the gas fire extinguishing system can be started manually. Exhaust system 9: It is mainly composed of the explosion-proof fan system of the motor system environment box and the exhaust fan system of the laboratory building. When the motor system catches fire and triggers the smoke concentration and temperature alarms of the smoke and temperature-sensing fire detectors, the fire control system automatically turns on the fire and smoke exhaust system, and the toxic and harmful gases generated by the combustion of the motor system are exhausted outside the laboratory through the smoke exhaust system. If the automatic start of the smoke exhaust system fails, press the start button of the fire smoke exhaust fan system to start the emergency strong exhaust. Motor system 10: The test object of the motor detection system. The motor system is mainly composed of a high-speed drive motor and a drive motor controller. High-speed drive motor refers to an electrical device that converts electrical energy into mechanical energy to provide driving force for the vehicle. This device has the function of converting mechanical energy into electrical energy. The high-speed drive referred to in this patent refers to a peak stable speed above 16,000rpm permanent magnet synchronous motor. The drive motor controller refers to the device that controls the energy transmission between the power supply and the drive motor, and is composed of a control signal interface circuit, a drive motor control circuit and a drive circuit.

Example 2

Referring to Figure 2, the motor detection method provided by the embodiment of the present application includes:

S1: Classify the early warning signals of functional modules and motor systems in advance;

S2: Receive the early warning signal sent by the functional module and the motor system;

S3: Determine the level of the early warning signal;

S4: Execute protection action according to the level of early warning signal.

In the above implementation process, different from the existing technology, the early warning signals of the functional modules are classified, and different protection actions are executed according to the classification, so that the motor system can be intelligently protected during the detection process of the motor system to prevent Excessive protection reduces detection efficiency and avoids damage to the motor system due to improper protection.

Referring to Fig. 3, in a possible implementation manner, S4 includes:

S41: Determine the current fault flag according to the level of the early warning signal;

S42: Determine the current fault level according to the current fault flag;

S43: Execute protection actions according to the fault level.

In the above implementation process, since the warning signals sent by multiple modules have different levels, firstly, the current fault flag is determined according to the level of the early warning signal; since there are multiple fault flags, the current fault level is determined according to the fault flag, Then perform protection actions according to the fault level.

The fault types of the motor detection system are as follows: First-level alarm signal: 1. Motor system output torque exceeds upper limit threshold alarm (DCU_TorqMax Error): This fault is set according to the allowable output torque upper limit of the motor system. When the motor system output torque value > motor The fault is triggered when the maximum output torque value allowed by the system is reached. When the output torque value of the motor system is ≤ the maximum output torque value allowed by the motor system, the fault is restored. The fault confirmation and recovery time is 20ms. 2. The output torque of the motor system exceeds the lower limit threshold alarm (DCU_TorqMin Error): Set according to the lower limit value of the output torque allowed by the motor system. When the output torque value detected by the motor system is < the minimum output torque value allowed by the motor system, this fault is triggered. When the output torque value detected by the motor system is greater than or equal to the minimum output torque value allowed by the motor system, the fault is restored, and the confirmation and recovery time of the fault is 20ms. 3. Motor controller IGBT temperature exceeds the upper limit threshold alarm (DCU_InvtTempMax Error): Set according to the temperature upper limit of the motor controller IGBT, when the motor controller detects that the IGBT temperature is greater than 95°C, this fault will be triggered. When the temperature of the IGBT is ≤95°C, the fault is restored, and the fault confirmation and recovery time is 500ms. 4. Motor system stator winding temperature exceeds the upper limit threshold alarm (DCU_StatTempMax Error): Set according to the temperature upper limit of the motor system stator winding, when the motor system stator winding temperature > 150 ℃, this fault will be triggered; when the motor system stator winding temperature ≤ The fault recovers at 150°C, and the fault confirmation and recovery time is 500ms. 5. The motor system coolant temperature exceeds the upper limit threshold alarm (DCU_TempCoolantMax Error): set according to the motor system coolant temperature upper limit, when the motor system coolant temperature > 65 ℃, this fault will be triggered, when the motor system coolant temperature ≤ 65 The fault recovers at ℃, and the fault confirmation and recovery time is 500ms. 6. Motor system speed exceeding threshold alarm (DCU_RotSpdMax Error): Set according to the upper limit of the motor system speed, when the speed of the motor system > the maximum speed allowed by the motor system, this fault will be triggered, and when the speed of the motor system The fault is recovered at the highest speed, and the fault confirmation and recovery time is 10ms. 7. Motor system failure (DCU_ModeSt Error): When the drive motor or motor controller fails, DCU_ModeSt=8, the fault is triggered, and when the fault is recovered, DCU_ModeSt≠8, the confirmation and recovery time of the fault is 10ms. 8. Motor system counter fault (DCU_MsgCounter Error): This fault is triggered when the motor system communication counter does not count in the order from 0-15, and the fault is restored after the count of 0-15 is restored. The confirmation and recovery time of the fault is 10ms. 9. Motor test system failure (E-Motor Test Bench Error): When the motor test system has a serious fault and cannot operate normally, the test bench fault code is set to 1. When the test bench fault is restored, the fault code is set to 0. The fault confirmation and recovery time is 100ms. 10. Communication failure of the motor detection system (E-Motor TestBenchWatchdog Error): This fault is triggered when the communication message between the motor detection system and the upper computer control system is lost. After the fault is restored, the fault is eliminated. The fault confirmation and recovery time is 10ms. 11. Motor detection system shaft protection cover abnormal opening alarm (Dyno_ShaftProtection Error): when the dynamometer speed is ≥ 5rpm and the high-speed transmission shaft system protection cover is opened, this fault is triggered; when the dynamometer speed is <5rpm or the high-speed transmission shaft system protection The fault is recovered when the cover is closed, and the fault confirmation and recovery time is 500ms. 12. Level 1 alarm (Voltmax1 Error) when the output voltage of the battery simulator exceeds the upper limit threshold: this fault is triggered when the output voltage of the battery simulator is > the maximum working voltage allowed by the motor system, and when the output voltage of the battery simulator is ≤ the maximum working voltage allowed by the motor system The fault recovers when the voltage is high, and the fault confirmation and recovery time is 10ms. 13. Level 1 alarm (Currmax1 Error) when the output current of the battery simulator exceeds the upper limit threshold: when the output current of the battery simulator > the maximum operating current allowed by the motor system, this fault is triggered; when the output current of the battery simulator ≤ the maximum working current allowed by the motor system The fault recovers when the current is flowing, and the fault confirmation and recovery time is 10ms. 14. Internal failure of the battery simulator (Battery SimulatorError): The failure code is set to 1 when a failure occurs inside the battery simulator and affects normal operation. When the internal failure of the battery simulator is recovered, the failure code is set to 0. The failure confirmation and recovery time is 100ms. 15. Battery Simulator Watchdog Fault: This fault is triggered when the communication message between the battery simulator and the upper computer control system of the motor detection system is lost. After the communication is restored, the fault is eliminated, and the fault confirmation and recovery time is 10ms. 16. Level 1 alarm (Climatic Chamber Tempmax1 Error): when the temperature in the environmental chamber of the motor system > the temperature setting value of the environmental chamber of the motor system, this fault is triggered; when the temperature in the environmental chamber of the motor system ≤ the temperature of the motor The fault is restored when the temperature of the system environment box is set, and the fault confirmation and recovery time is 500ms. 17. Climatic Chamber Error in the motor system environment box (Climatic Chamber Error): When a fault occurs inside the motor system environment box and affects the operation, the fault code of the motor system environment chamber is set to 1, and when the motor system environment chamber fault is recovered, the fault code is set to 0, and the fault is confirmed And recovery time is 500ms. 18. Communication failure of the motor system environment box (Climatic Chamber Watchdog Error): This fault is triggered when the communication message between the motor system environment box and the upper computer control system of the motor detection system is lost. After the communication is restored, the fault is eliminated, and the fault confirmation and recovery time is 500ms . 19. Level 1 alarm (CoolantFlowmax1 Error) when the coolant flow of the cooling circulating water machine exceeds the upper limit threshold: this fault is triggered when the coolant flow of the motor system is greater than the maximum flow allowed by the coolant of the motor system, and when the coolant flow of the motor system is ≤ the allowable flow of the motor system The fault is restored when the maximum flow rate is reached, and the fault confirmation and recovery time is 500ms. 20. Level 1 alarm (CoolantTempmax1Error) when the coolant temperature of the cooling circulating water machine exceeds the upper limit threshold: this fault is triggered when the coolant temperature of the cold motor system is greater than the maximum temperature allowed for the coolant of the motor system, and when the coolant temperature of the motor system ≤ the cooling The fault is restored when the maximum temperature of the fluid is allowed, and the fault confirmation and recovery time is 5000ms. 20. Internal fault of cooling circulating water machine (Coolant Condition System Fault): When the cooling circulating water machine has a serious fault and cannot operate normally, the fault position of the cooling circulating water machine is 1. If the fault is recovered, the fault position of the cooling circulating water machine is 0, and the fault Confirmation and recovery time is 500ms. 21. Cooling circulating water machine watchdog communication fault (CoolantCondition System Watchdog Fault): This fault is triggered when the communication between the cooling circulating water machine and the upper computer control system of the motor detection system is lost. After the communication is restored, the fault is eliminated. The fault confirmation and recovery time is 500ms.

Secondary alarm signal: 1. Abnormal Intrusion Alarm: When the door of the motor detection system is opened, the fault is triggered when the speed of the dynamometer is ≥1000rpm. When the door of the motor detection system is opened, the speed of the dynamometer <1000rpm or when the laboratory door is closed, the fault recovery, the fault confirmation and recovery time is 500ms. 2. Communication failure between the host computer control system of the motor detection system and the safety control system (Host Computer System Watchdog Fault): This fault is triggered when the communication between the host computer control system of the motor detection system and the safety control system is interrupted. When the two systems resume normal communication, the Fault recovery, fault confirmation and recovery time is 500ms. 3. Dyno_RotSpdMax Error: When the dynamometer speed exceeds DCU_RotSpdMax+1000rpm, the fault is triggered, and when the dynamometer speed is ≤DCU_RotSpdMax+1000rpm, the fault is restored, and the fault confirmation and recovery time is 100ms . 4. The speed difference between the speed encoder of the dynamometer and the torque sensor exceeds the threshold alarm (Dyno_SpdDiff Error): when the speed difference collected by the speed encoder of the dynamometer and the torque sensor is ≥ 50rpm, this fault is triggered. When the speed difference collected by the torque sensor is less than 50rpm, the fault is restored, and the fault confirmation and recovery time is 100ms. 5. Dynamometer bearing and stator coil temperature exceeding threshold alarm (Dyno_TempMax Error): when the dynamometer bearing temperature is ≥80°C or the dynamometer stator winding coil temperature is ≥160°C, this fault is triggered; when the dynamometer bearing temperature is < 80°C and the temperature of the stator winding coil of the dynamometer <160°C, the fault is restored, and the fault confirmation and recovery time is 500ms. 6. The vibration value of the dynamometer exceeds the threshold alarm (Dyno_VibMax Error): the fault is triggered when the vibration amplitude of the dynamometer is ≥ 4.5mm/s and the speed of the dynamometer is ≥ 5rpm. When the vibration amplitude of the dynamometer is < 4.5mm/s And when the speed of the dynamometer is ≥5rpm, the fault is restored, and the fault confirmation and recovery time is 200ms. 7. Motor detection system power supply system phase sequence check error alarm (Power Supply System PhaseSequence Error): When the phase sequence of the motor detection system power supply system is wrong, the phase sequence relay fault position is 1, and when the phase sequence returns to normal, the phase sequence relay fault position is 0 , fault confirmation and recovery time is 200ms. 8. Level 2 alarm (Voltmax2 Error) when the output voltage of the battery simulator exceeds the upper limit threshold: when the output voltage of the battery simulator is > Voltmax1+10V, the fault is triggered; when the output voltage of the battery simulator is ≤ Voltmax1+10V, the fault is restored and the fault is confirmed And recovery time is 200ms. 9. Level 2 alarm (Currmax2 Error) when the output current of the battery simulator exceeds the upper limit threshold: when the output current of the battery simulator is > Currmax1+50A, the fault is triggered; when the output current of the battery simulator is ≤ Currmax1+50A, the fault is restored and the fault is confirmed And recovery time is 200ms. 10. Level 2 alarm (ClimaticChamber Tempmax2 Error) when the temperature of the environmental chamber of the motor system exceeds the upper limit threshold: this fault is triggered when the temperature of the environmental chamber of the motor system > Climatic Chamber Tempmax1+5°C; when the temperature of the environmental chamber of the motor system ≤ Climatic Chamber Tempmax1+5°C The fault recovery, fault confirmation and recovery time is 500ms. 11. Level 2 alarm (CoolantFlowmax2 Error) when the coolant flow rate of the cooling circulating water machine exceeds the upper limit threshold: this fault is triggered when the cooling liquid flow rate of the cooling circulating water machine > CoolantFlowmax1+2L/min, and when the cooling liquid flow rate of the cooling circulating water machine≤CoolantFlowmax1+ The fault is recovered at 2L/min, and the fault confirmation and recovery time is 500ms. 12. Level 2 alarm (CoolantTempmax2Error) when the coolant temperature of the cooling circulating water machine exceeds the upper limit threshold: this fault is triggered when the cooling liquid temperature of the cooling circulating water machine > CoolantFlowmax1+5°C, and when the cooling liquid temperature of the cooling circulating water machine ≤ CoolantFlowmax1+5°C When the fault is recovered, the fault confirmation and recovery time is 500ms. 13. Fire Alarm System Watchdog Fault: This fault is triggered when the fire control system and the motor system detect that the watchdog communication of the safety control system is interrupted. When the watchdog communication fault is restored, the fault is restored and the fault is confirmed and recovery time is 500ms.

Three-level alarm signal: 1. The motor detection system triggers a fire alarm (Fire Detection Alarm): when the motor system is on fire during the test process, high-temperature heat radiation and a large amount of gas trigger the alarm of the smoke and temperature detectors. When the motor system fire is extinguished The alarm recovery, alarm confirmation and recovery time is 500ms. 2. E-Motor Test Bench Emergency-Stop: This fault is triggered when the E-Motor Test Bench Emergency-Stop switch is pressed, and is restored when the E-Stop switch is released. 3. The battery simulator triggers the emergency stop switch (Battery SimulatorEmergency-Stop): When the battery simulator triggers the emergency stop switch and presses down, the fault is triggered, and the fault is restored when the emergency stop switch is released. 4. Press the Climatic Chamber Emergency-Stop switch of the motor system environment box (Climatic Chamber Emergency-Stop): This fault is triggered when the emergency stop switch of the motor system environment chamber is pressed, and the fault recovers when the emergency stop switch is released. 5. Press the emergency stop switch of the cooling circulating water machine (Coolant Condition System Emergency-Stop): This fault is triggered when the emergency stop switch of the cooling circulating water machine is pressed, and the fault is restored when the emergency stop switch is released.

Since the fault flags include: a flag for a first-level fault alarm, a flag for a secondary fault alarm, and a flag for a third-level fault alarm; therefore, the embodiment of the present application provides a S32 comprising:

The step of determining the current fault level according to the current fault flag bit includes: determining the fault level by the following formula: E-Motor Lab_Error_Flag=0×Y ₀ +1×Y ₁ +2×Y ₂ +4 ×Y ₃ ; Wherein, E-Motor Lab_Error_Flag is the fault level, wherein, Y ₀ is no fault flag; Y ₁ is the flag of the first-level fault alarm; Y ₂ is the flag of the second-level fault alarm; Y ₃ It is the flag bit for the third-level fault alarm. When the flag bit of the first-level fault is 1, the flag bit of the second-level fault alarm and the flag bit of the third-level fault alarm are 0, and when the flag bit of the second-level fault is 1, the The flag bit of the secondary fault alarm is 0.

In the above implementation process, based on the value of each flag bit, the current fault level can be obtained.

Further, an embodiment of the present application provides a method for determining the current flag bit, including: the step of determining the current fault flag bit according to the level of the early warning signal includes: confirming that the The flag bit of the first-level fault alarm is 1; responding to at least one second-level early warning signal; confirming that the flag bit of the second-level fault alarm is 1.

Further, the early warning signal also includes: a three-level early warning signal; the three-level early warning signal includes: a fire alarm signal and other three-level early warning signals; the step of determining the current fault flag according to the level of the early warning signal , further comprising: confirming that the flag bit of the three-level fault alarm is 1 in response to the fire alarm signal and at least one of the three-level early warning signals.

Referring to Fig. 4, in a possible implementation manner, S43 includes:

S431: When the fault level is 1, control the dynamometer of the motor system detection equipment to maintain the speed control mode; control the motor to maintain the torque control mode;

S432: Control the dynamometer to reduce to 0 at a first rate within a first time; control the motor system to reduce the output torque to 0 at a second rate;

S433: Control the motor system environment box to restore the temperature inside the box to the first temperature at a third rate.

Preferably, the first rate is 400rps; the second rate=the output torque value of the motor system when the detection system enters the primary failure mode/half of the first time (2T/t1); the third rate is 0.5°C/min; the first The temperature is 25±5°C.

Exemplarily, when the motor detection system enters the first-level fault processing mode, an alarm information dialog box pops up firstly on the upper computer control system of the motor detection system, the yellow alarm light flickers, and the buzzer sounds. Then the dynamometer of the motor system testing equipment maintains the speed control mode, and the tested motor system maintains the torque control mode. The dynamometer decreases to 0 at a rate of 400rps, and the elapsed time is t1. The output torque is reduced to 0, where T is the output torque value of the motor system when the motor detection system enters the first-level failure mode. The battery simulator maintains normal output in voltage control mode, and the 12V power supply of the high-speed motor system maintains normal output. The motor system environment chamber restores the temperature inside the chamber to 25±5°C at a rate of 0.5°C/min. The cooling circulating water machine continues to maintain the original operating state. When the test personnel troubleshoot and reset the test equipment, the control system of the upper computer of the motor detection system will re-judge the status of the test equipment. If the fault has been reset (E-Motor Lab_Error_Flag=0), the motor detection system will resume the motor test mode. If there is still a first-level alarm failure (E-Motor Lab_Error_Flag=1) in the motor detection system, repeat the above-level alarm processing flow.

In the above implementation process, the protection operation when the fault level is 1 is provided, so that the detection system can flexibly protect the motor system based on the current fault level.

Referring to FIG. 5, in a possible implementation manner, S43 also includes:

S434: When the fault level is 2, the frequency converter controlling the dynamometer is switched to an emergency stop mode;

S435: Control the rotational speed of the dynamometer to decrease at a fourth rate and maintain it for a second time;

S436: the frequency converter controlling the dynamometer is switched to a free stop mode;

S437: Control the battery simulator to stop outputting, and cut off the high voltage output of the battery simulator in the third time when the output DC bus voltage is lower than the safe voltage;

S438: Control the high-voltage transfer box to cut off the output of the high-voltage relay within a fourth time after the DC bus voltage drops to a safe voltage;

S439: Control the motor system environment box to return to the second temperature at the fifth rate, and delay the shutdown for the fifth time;

S4310: In response to the signal that the rotational speed of the motor system is 0, delay to cut off the low-voltage control power supply of the motor system for a sixth time.

In addition, the cooling system of the dynamometer and the cooling circulating water can also be shut down.

Preferably, the second time is 6s to ensure that the speed of the dynamometer is 0; the fourth time is 30ms; the safety voltage is 60Vdc; the fifth time is 5s; the sixth time is 10s; the second temperature is 25±5°C.

Exemplarily, when the motor detection system enters the secondary fault handling mode, an alarm information dialog box pops up firstly on the safety control system of the motor detection system, the orange alarm light flashes, and the buzzer sounds. Then the frequency converter of the dynamometer triggers the SS1 emergency stop mode (deceleration stop mode, the frequency converter controls the dynamometer to add reverse torque and stop according to the specified slope). The speed is 0, and then the inverter enters the STO mode (free stop mode, the inverter releases the control of the dynamometer and allows it to coast to stop), and the dynamometer system enters the free coasting state. At the same time, the battery simulator stops outputting and enters discharge protection mode until the DC bus voltage is detected to be lower than 60Vdc, then cuts off the high-voltage output within 30ms, and the high-voltage transfer box waits for the DC bus voltage to drop to a safe voltage of 60Vdc. Internally cut off the high voltage relay output. Then the motor system environment chamber returns the temperature inside the chamber to 25±5°C at a rate of 0.5°C/min, and the walk-in environment chamber shuts down after a delay of 5s. At the same time, when the speed of the high-speed motor system decreases to 0, the 12V power supply of the motor system is cut off after a delay of 10s. Then the cooling system of the dynamometer and the cooling circulating water are shut down. After the test personnel troubleshoot and reset the test equipment, the control system of the upper computer of the motor detection system will re-judge the status of the test equipment. If the fault has been reset (E-Motor Lab_Error_Flag=0), the motor detection system will resume the motor test mode. If the motor detection system still has a secondary alarm failure (E-Motor Lab_Error_Flag=2), repeat the above secondary alarm processing procedure.

In the above implementation process, the protection operation when the fault level is 2 is provided, so that the detection system can flexibly protect the motor system based on the current fault level.

Referring to FIG. 6, in a possible implementation manner, S43 also includes:

S4311: when the fault level is 3, control the exhaust system to be automatically turned on;

S4312: Control the frequency converter of the dynamometer to switch to the emergency stop mode; the speed of the dynamometer decreases at the sixth rate and maintains for the seventh time;

S4313: controlling the inverter to switch to a free stop mode;

S4314: Control the battery simulator to stop the output, and cut off the high voltage output of the battery simulator within the eighth time when the output DC bus voltage is lower than the safe voltage;

S4315: When the DC bus voltage drops to a safe voltage, cut off the high-voltage relay output of the high-voltage transfer box within the ninth time;

S4316: controlling the shutdown of the battery simulator;

S4317: Control the motor system environment box to turn on the gas fire extinguishing system;

S4318: After the motor system speed decreases to 0, delay the tenth time to cut off the low-voltage control power supply of the motor system.

In addition, it also includes motor system testing equipment and cooling circulating water shutdown.

Preferably, the sixth rate is 3333rps; the seventh time is 6s; the eighth time is 30ms; the ninth time is 30ms; and the tenth time is 10s.

Exemplarily, when the motor detection system enters the three-level fault processing mode, an alarm information dialog box pops up first on the safety control system of the motor detection system, the red alarm light flashes and the peak beep alarm sounds, and the exhaust system is automatically turned on. Then the frequency converter of the dynamometer triggers the SS1 emergency stop mode (deceleration stop mode, the frequency converter controls the dynamometer to add reverse torque and stop according to the specified slope). The speed is 0, and then the inverter enters the STO mode (free stop mode, the inverter releases the control of the dynamometer and allows it to coast to stop), and the dynamometer system enters the free coasting state. At the same time, the battery simulator stops outputting and enters discharge protection mode until the DC bus voltage is detected to be lower than 60Vdc, then cuts off the high-voltage output within 30ms, and the high-voltage transfer box waits for the DC bus voltage to drop to a safe voltage of 60Vdc. Cut off the output of the high-voltage relay internally. After the DC bus voltage drops to a safe voltage of 60Vdc, the high-voltage transfer box cuts off the output of the relay within 30ms, and then shuts down the battery simulator. Then the motor system environment box automatically turns on the gas fire extinguishing system, and when the motor system fire is extinguished, the environment box automatically shuts down. When the speed of the high-speed motor system decreases to 0, cut off the 12V power supply of the motor system after a delay of 10s. Then the motor system detection equipment and the cooling circulating water are shut down. After the test personnel troubleshoot and reset the test equipment, the upper computer control system of the motor detection system will re-judge the state of the test equipment. If the fault has been reset (E-Motor Lab_Error_Flag=0), the motor system detection system will resume the motor test mode , if the motor system detection system still has a three-level alarm failure (E-Motor Lab_Error_Flag=4), then repeat the above three-level alarm processing flow.

In the above implementation process, the protection operation when the fault level is 3 is provided, so that the detection system can flexibly protect the motor system based on the current fault level.

The present application also provides an electronic device, please refer to FIG. 7 , which is a structural block diagram of an electronic device provided in an embodiment of the present application. The electronic device may include a processor 71 , a communication interface 42 , a memory 73 and at least one communication bus 74 . Wherein, the communication bus 74 is used to realize the direct connection and communication of these components. Wherein, the communication interface 42 of the electronic device in the embodiment of the present application is used for signaling or data communication with other node devices. The processor 71 may be an integrated circuit chip, which has a signal processing capability.

Above-mentioned processor 71 can be general-purpose processor, comprises central processing unit (Central Processing Unit, CPU), network processor (Network Processor, NP) etc.; Can also be digital signal processor (DSP), application-specific integrated circuit (ASIC) , off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general processor can be a microprocessor or the processor 71 can also be any conventional processor or the like.

Memory 73 can be, but not limited to, random access memory (Random Access Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read-only memory (Programmable Read-Only Memory, PROM), erasable Read-only memory (Erasable Programmable Read-Only Memory, EPROM), Electric Erasable Programmable Read-Only Memory (EEPROM), etc. Computer-readable instructions are stored in the memory 73 , and when the computer-readable instructions are executed by the processor 71 , the electronic device can execute various steps involved in the foregoing method embodiments.

Optionally, the electronic device may further include a storage controller and an input/output unit.

The memory 73 , storage controller, processor 71 , peripheral interface, and input/output unit are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, these components may be electrically connected to each other via one or more communication buses 74 . The processor 71 is used to execute executable modules stored in the memory 73 , such as software function modules or computer programs included in the electronic device.

The input and output unit is used for creating a task for the user and creating an optional start period or execution time for the task to realize the interaction between the user and the server. The input and output unit may be, but not limited to, a mouse and a keyboard.

It can be understood that the structure shown in FIG. 7 is only for illustration, and the electronic device may also include more or less components than those shown in FIG. 7 , or have a configuration different from that shown in FIG. 7 . Each component shown in FIG. 7 may be implemented by hardware, software or a combination thereof.

The embodiment of the present application also provides a computer-readable storage medium, where instructions are stored on the computer-readable storage medium. When the instructions are run on a computer, the computer program is executed by a processor to implement the method described in the embodiment. The method described above is not repeated here to avoid repetition.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may also be implemented in other ways. The device embodiments described above are only illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the architecture, functions and possible implementations of devices, methods and computer program products according to multiple embodiments of the present application. operate. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified function or action , or may be implemented by a combination of dedicated hardware and computer instructions.

In addition, each functional module in each embodiment of the present application may be integrated to form an independent part, each module may exist independently, or two or more modules may be integrated to form an independent part.

If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other various media that can store program codes. .

The above descriptions are only examples of the present application, and are not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and changes may be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application. It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Claims (10)

1. The motor system detection method is applied to a motor detection system, the motor detection system is used for detecting the performance of a motor system, and the motor detection system comprises: the control system is connected with the functional module and the motor system; the method comprises the following steps:

classifying the early warning signals of the functional module and the motor system in advance;

receiving early warning signals sent by the functional module and the motor system;

determining a level of the early warning signal;

and executing a protection action according to the grade of the early warning signal.

2. The motor system detection method of claim 1, wherein the step of performing a protective action based on the level of the warning signal comprises:

determining a current fault zone bit according to the grade of the early warning signal;

determining the current fault grade according to the current fault zone bit;

and executing the protection action according to the current fault level.

3. The electric machine system detection method of claim 2, wherein the fault flag comprises: a zone bit of the first-level fault alarm, a zone bit of the second-level fault alarm and a zone bit of the third-level fault alarm;

the step of determining the current fault level according to the current fault flag bit includes:

determining the current fault level by:

E-Motor Lab_Error_Flag＝0×Y₀+1×Y₁+2×Y₂+4×Y₃；

wherein E-Motor Lab _ Error _ Flag is the fault level, wherein Y is₀A fault-free flag bit; y is₁A flag bit for primary fault alarm; y is₂A flag bit for secondary fault alarm; y is₃Is a flag bit of three-level fault alarm.

4. The electric machine system detection method of claim 3, wherein the warning signal comprises: a primary early warning signal and a secondary early warning signal;

the step of determining the current fault flag bit according to the level of the early warning signal comprises the following steps:

responding to at least one primary early warning signal, and confirming that the flag bit of the primary fault alarm is 1;

responding to at least one secondary warning signal; and confirming that the flag bit of the secondary fault alarm is 1.

5. The electric machine system detection method of claim 4, wherein the warning signal further comprises: a third-level early warning signal;

the tertiary early warning signal includes: fire alarm signals and other three-level early warning signals;

the step of determining the current fault flag bit according to the level of the early warning signal further comprises:

and responding to the fire alarm signal and at least one third-stage early warning signal, and confirming that the flag bit of the third-stage fault alarm is 1.

6. The electric machine system detection method of claim 2, wherein the functional module comprises: the battery simulator is connected with the control module;

the motor system detection equipment is connected with the control module;

the motor system environment box is connected with the control module;

the step of performing the protection action according to the failure level includes:

when the fault level is 1, controlling a dynamometer of the motor system detection equipment to keep a rotating speed control mode;

controlling the motor system to maintain a torque control mode;

controlling the dynamometer to fall to 0 at a first rate within a first time;

controlling the motor system to reduce the output torque to 0 at a second rate;

and controlling the motor system environment box to recover the temperature in the box to the first temperature according to a third speed.

7. The electric machine system detection method of claim 6, wherein the functional module comprises: the high-voltage transfer box is connected with the motor system;

the step of executing the protection action according to the fault level further comprises:

when the fault level is 2, controlling a frequency converter of the dynamometer to be switched into an emergency stop mode;

controlling the rotating speed of the dynamometer to decrease at a fourth rate and keeping the rotating speed for a second time;

controlling a frequency converter of the dynamometer to be converted into a free parking mode;

controlling the battery simulator to stop outputting, and cutting off the high-voltage output of the battery simulator within a third time when the output direct-current bus voltage is lower than the safety voltage;

controlling the high-voltage transfer box to cut off the output of the high-voltage relay within a fourth time after the voltage of the direct-current bus is reduced to a safe voltage;

controlling the motor system environment box to return to the second temperature at a fifth rate, and delaying the shutdown at a fifth time;

and responding to a signal that the rotating speed of the motor system is 0, and cutting off the low-voltage control power supply of the motor system in a delayed sixth time.

8. The electric machine system detection method according to claim 7, wherein the functional module comprises: the control module is connected with the air exhaust system;

the step of executing the protection action according to the fault level further comprises:

when the fault grade is 3, controlling the exhaust system to be automatically started;

controlling the frequency converter of the dynamometer to be converted into an emergency stop mode

The rotating speed of the dynamometer is reduced at a sixth rate and is kept for a seventh time;

controlling the frequency converter to be converted into a free parking mode;

controlling the battery simulator to stop outputting, and cutting off the high-voltage output of the battery simulator within eighth time when the output direct-current bus voltage is lower than the safe voltage;

when the voltage of the direct current bus is reduced to the safe voltage, the output of a high-voltage relay of the high-voltage transfer box is cut off in the ninth time;

controlling the battery simulator to shut down;

controlling the motor system environment box to start a gas fire extinguishing system;

and after the rotating speed of the motor system is reduced to 0, delaying the tenth time to cut off the low-voltage control power supply of the motor system.

9. An electronic device, comprising: memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any of claims 1 to 8 when executing the computer program.

10. A computer-readable storage medium having instructions stored thereon, which when executed on a computer, cause the computer to perform the method of any one of claims 1-8.

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