CN115549336B - Calibration test method for oil-cooled motor - Google Patents
Calibration test method for oil-cooled motorInfo
- Publication number
- CN115549336B CN115549336B CN202211345194.XA CN202211345194A CN115549336B CN 115549336 B CN115549336 B CN 115549336B CN 202211345194 A CN202211345194 A CN 202211345194A CN 115549336 B CN115549336 B CN 115549336B
- Authority
- CN
- China
- Prior art keywords
- oil
- cooling
- operation information
- temperature
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
本发明涉及新能源汽车动力总成和电机标定测试技术领域，具体涉及一种油冷电机的标定测试方法，在油冷电机的定子绕组、油冷电机的定子的铁芯和定子绕组的连接铜排中的至少一处设置多个用于反馈第一温度信息的第一温度传感器组；将定子、转子和转轴包围在壳体和端盖围成的密封空间内，在密封空间中设置油路通道，并将油路通道外接油泵单元；制成油冷电机的样机，设定的电机运转信息控制定子、转子和转轴模拟油冷电机的电机运转；设定的油路运转信息使冷却油在油路通道运转，来模拟冷却油在油冷电机的冷却系统中的实际运转；根据第一温度信息得到温度分布信息，根据温度分布信息判断油路运转信息的设定是否满足设计要求。
The present invention relates to the technical field of powertrain and motor calibration testing of new energy vehicles, and particularly to a calibration testing method for an oil-cooled motor. The method comprises the following steps: a first temperature sensor group for feeding back first temperature information is arranged at least one of a stator winding of the oil-cooled motor, an iron core of the stator of the oil-cooled motor, and a connecting copper bar of the stator winding; the stator, a rotor, and a rotating shaft are enclosed in a sealed space surrounded by a shell and an end cover, an oil circuit channel is arranged in the sealed space, and the oil circuit channel is externally connected to an oil pump unit; a prototype of the oil-cooled motor is manufactured, and set motor operation information controls the stator, rotor, and rotating shaft to simulate the motor operation of the oil-cooled motor; the set oil circuit operation information causes cooling oil to operate in the oil circuit channel to simulate the actual operation of the cooling oil in the cooling system of the oil-cooled motor; temperature distribution information is obtained according to the first temperature information, and it is judged according to the temperature distribution information whether the setting of the oil circuit operation information meets the design requirements.
Description
Technical Field
The invention relates to the technical field of new energy automobile power assembly and motor calibration test, in particular to a calibration test method of an oil cooling motor.
Background
At present, a motor used for an electric automobile mainly comprises a permanent magnet synchronous motor, and the cooling mode mainly comprises water cooling and oil cooling, wherein the water cooling is mainly used. However, with the integration, high speed, high efficiency and high power density of the electric drive system, the heat dissipation effect of low water cooling is not enough to meet the temperature control requirement of the motor. Therefore, the oil-cooled motor is gradually rising, and is different from a water-cooled motor in that the oil-cooled motor only indirectly exchanges heat with the shell through the stator and the shell, and the shell and cooling water, and the oil-cooled motor directly exchanges heat with main heat sources (such as a stator core, a stator winding, a rotor core, a bearing and the like) in the motor through cooling oil, so that the heat dissipation effect is better.
The calibration test of the oil cooling motor can not assemble a reduction gearbox, but at the same time, circulation and closing of an oil way are required to be ensured, and the conventional calibration test method of the oil cooling motor mainly carries out motor temperature rise test on a prototype of the oil cooling motor through simulation analysis, and evaluates the integral cooling effect of the oil cooling motor according to the result of the motor temperature rise test so as to verify whether the design scheme of the oil cooling motor meets the design requirement, but the conventional calibration test method of the oil cooling motor can only carry out integral evaluation on the related design parameters of a cooling system of the oil cooling motor, and is difficult to carry out independent evaluation and verification on rationality of each design parameter (such as total oil amount of cooling oil circulated in the cooling system, flow of cooling oil conveyed by an oil pump, flow distribution of cooling oil conveyed to a main heat source inside the motor and the like), so that the related design parameters of the cooling system in the design scheme of the oil cooling motor are difficult to be guided, verified and optimized in a targeted manner through the conventional calibration test method of the oil cooling motor.
Disclosure of Invention
The invention provides a calibration test method of an oil cooling motor, which solves the technical problems that the calibration test method of the existing oil cooling motor is difficult to conduct targeted guidance, verification and optimization on each relevant design parameter of a cooling system in the design scheme of the oil cooling motor.
The technical scheme adopted by the invention is that the calibration test method of the oil cooling motor comprises the following steps:
The method comprises the following steps of 1, arranging a plurality of first temperature sensor groups for feeding back first temperature information at least one position among a stator winding of an oil cooling motor, an iron core of the stator of the oil cooling motor and a connecting copper row of the stator winding;
Step 2, installing a stator, a rotor and a rotating shaft of the oil cooling motor in a shell for simulating the shell of the oil cooling motor;
Step 3, installing an end cover at one end of the shell, surrounding the stator, the rotor and the rotating shaft in a sealed space surrounded by the shell and the end cover, wherein an oil path channel is arranged in the sealed space, and the oil path channel is externally connected with an oil pump unit;
step 4, setting motor operation information and oil circuit operation information of a calibration test;
Step 5, controlling the stator, the rotor and the rotating shaft to simulate the motor operation of the oil-cooled motor based on the set motor operation information, enabling cooling oil to operate in the oil path channel based on the set oil path operation information to simulate the actual operation of the cooling oil in a cooling system of the oil-cooled motor, and obtaining temperature distribution information through the first temperature information fed back by each first temperature sensor group;
And 6, judging whether the setting of the oil way operation information meets the design requirement according to the temperature distribution information, returning to the step4, adjusting the set value of the motor operation information to perform the next round of simulation and judgment if the setting of the oil way operation information meets the design requirement, and returning to the step4, adjusting the set value of the oil way operation information to perform the next round of simulation and judgment if the setting of the oil way operation information does not meet the design requirement.
According to the calibration test method, an end cover is arranged at one end of the shell, and the stator, the rotor and the rotating shaft are enclosed in a sealed space enclosed by the shell and the end cover to manufacture a prototype of the oil cooling motor;
simulating operation of the oil-cooled motor under specific conditions (such as, but not limited to, rated torque, rated rotational speed, peak power) by controlling the stator, the rotor, and the rotating shaft based on the set motor operation information;
the actual operation of the cooling oil in the cooling system of the oil-cooled motor is simulated by the set oil-way operation information to enable the cooling oil to operate in the oil-way channel, so that the actual operation of the cooling system of the oil-cooled motor under various working conditions is simulated by the operation of a prototype of the oil-cooled motor;
In the simulation process, the oil circuit operation information comprises one or more of the design parameters of the cooling system of the oil cooling motor (such as total oil quantity of cooling oil circulated in the cooling system, output flow of cooling oil conveyed by an oil pump, aperture of an oil inlet of a motor shell, aperture of an oil outlet of the motor shell, aperture of oil holes on an oil spraying ring, quantity of oil holes on the oil spraying ring, flow distribution of cooling oil conveyed to a main heat source inside the motor by the cooling system and the like), and in the step 1, a plurality of first temperature sensors are arranged at least one part of a stator winding of the oil cooling motor, a core of the stator of the oil cooling motor and a connecting copper row of the stator winding according to analysis and verification to obtain temperature distribution information, so that the actual cooling effect of the cooling oil in the simulation process can be analyzed and verified, and the specific guidance, verification and optimization of the relevant design parameters of the cooling system in the design scheme of the oil cooling motor can be realized through a calibration test method of the oil cooling motor.
Further, the oil passage operation information includes a total oil amount of the cooling oil circulated in the oil passage and an output flow rate of the oil pump unit.
The corresponding motor operation information is set to control the stator, the rotor and the rotating shaft to simulate the operation of the oil-cooled motor under specific working conditions (such as, but not limited to, rated torque, rated rotating speed, peak power and the like), and the stator, the rotor and the rotating shaft can simulate the operation of the oil-cooled motor under different working conditions (such as, but not limited to, the motor operation information comprises the rotating speed and the torque of the rotating shaft, or the motor operation information comprises the input voltage and the input current of the stator winding) by adjusting the set values of the motor operation information.
Further, the motor operation information includes a rotational speed and a torque of the rotating shaft.
Further, the step5 includes the following sub-steps:
s1, controlling the oil pump unit based on the set oil way operation information, pumping the cooling oil into the oil way channel, and enabling the cooling oil to circularly flow in the oil way channel;
S2, controlling the stator, the rotor and the rotating shaft to operate based on the set motor operation information so as to heat the stator winding, the iron core of the stator and the connecting copper bars;
and S3, after the fluctuation value of the first temperature information fed back by each first temperature sensor group in the set time is smaller than a set value, the first temperature information obtained at the moment is corresponding to the arrangement position of each first temperature sensor group, and the temperature distribution information is obtained.
When the fluctuation values of the first temperature information fed back by the first temperature sensor group in the set time are smaller than the set value, namely, when the position provided with the first temperature sensor group reaches heat balance.
Further, the oil pump unit comprises an oil pipe, an oil cooler and an oil pump, wherein the oil cooler and the oil pump are arranged on the oil pipe, an oil collecting box is integrated on the oil pump and is used for storing the cooling oil, the oil pump is used for pumping the cooling oil in the oil collecting box into the oil path channel after conveying the cooling oil to the oil cooler for cooling, and the cooling oil in the oil path channel is pumped into the oil collecting box;
the oil pipe is provided with a flowmeter, the flowmeter is used for obtaining flow information of cooling oil conveyed by the oil pump, the oil cooler is provided with a second temperature sensor used for obtaining second temperature information of the cooling oil cooled by the oil cooler, and the oil collecting box and the oil cooler are both provided with visual windows.
Further, in the step S1, after the cooling oil circulates in the oil path, it is determined whether the cooling oil circulates stably in the oil path, if so, S2 is entered, otherwise S1 is repeated;
the method for judging whether the cooling oil stably circulates in the oil path passage includes the following substeps:
S101, adding the cooling oil with corresponding oil quantity into the oil collecting box according to the total oil quantity in the oil circuit operation information;
s102, starting the oil pump and the oil cooler, and controlling the rotation speed value of the oil pump to enable flow information fed back by the flowmeter to be consistent with the flow in the oil way operation information;
S103, detecting the second temperature information, judging whether the numerical value of the temperature value of the cooling oil cooled by the oil cooler is in a first range or not, if so, entering S104, and if not, returning to S103;
S104, judging whether the cooling oil circulation is cutoff and oil liquid is coiled or not through the visual window, judging that the cooling oil stably circulates in the oil path if the cooling oil circulation is cutoff and the oil liquid is not coiled, and otherwise, judging that the cooling oil does not stably circulate in the oil path.
Further, in the step 6, the method for judging whether the setting of the oil path operation information meets the design requirement according to the temperature distribution information comprises judging whether the temperature fed back by each first temperature sensor group is lower than the preset temperature corresponding to the position set by each first temperature sensor group according to the temperature distribution information, if so, judging that the setting of the oil path operation information meets the design requirement, otherwise, judging that the setting of the oil path operation information does not meet the design requirement.
Further, the oil path operation information includes the number of oil spray holes of the oil spray ring and the aperture of each oil spray hole.
Correspondingly, the setting of the motor operation information can control the stator, the rotor and the rotating shaft to simulate the operation of the oil-cooled motor under specific working conditions (such as, but not limited to, rated torque, rated rotating speed, peak power and the like), and can enable the stator, the rotor and the rotating shaft to simulate the operation of the oil-cooled motor under different working conditions (such as, but not limited to, the motor operation information comprises the rotating speed and the torque of the rotating shaft, or the motor operation information comprises the input voltage and the input current of the stator winding) by adjusting the set values of the motor operation information.
Further, in step 1, a plurality of first temperature sensor groups arranged on a stator winding of an oil-cooled motor comprise a plurality of temperature sensors arranged on a wire insertion end of the stator winding, a plurality of temperature sensors arranged on a welding end of the stator winding and a plurality of temperature sensors arranged on a connecting copper bar of the welding end of the stator winding;
In the step 2, the shell is sleeved outside the iron core of the stator and is in interference fit with the iron core;
in the step 3, the oil injection ring is also installed between the end cover and the iron core.
Further, the oil path channel comprises a plurality of annular oil grooves formed in the circumferential direction and a plurality of axial oil grooves formed in the axial direction on the inner circumferential surface of the shell, the annular oil grooves are communicated with the axial oil grooves, an oil inlet and an oil outlet of the oil path channel are formed in the shell or the end cover, the oil pump unit conveys the cooling oil to the annular oil grooves and the axial oil grooves through the oil inlet, and the oil pump unit withdraws the cooling oil in the oil path channel through the oil outlet;
The axial oil groove and the annular oil groove are used for being matched with the outer peripheral surface of the iron core, the axial two ends of the axial oil groove respectively exceed the axial two ends of the iron core, one end, far away from the end cover, of the axial oil groove is used for conveying cooling oil to one end, far away from the end cover, of the stator winding, one end, close to the end cover, of the axial oil groove, the shell, the oil injection ring and the iron core enclose an oil cavity, a plurality of oil injection holes are circumferentially distributed on the oil injection ring, one end of each oil injection hole is communicated with the oil cavity, and the other end of each oil injection hole faces one end, close to the end cover, of the stator winding.
The end, close to the end cover, of the axial oil groove, the shell, the oil injection ring and the iron core enclose an oil cavity, and the cooling oil can be conveyed to the end, close to the end cover, of the stator winding through the oil injection holes on the oil injection ring;
Meanwhile, the axial thickness of the oil spraying ring can be adjusted, so that the shell can be matched with various stators with different axial lengths under the same radius.
Further, in the step 6, the method for judging whether the setting of the oil path operation information meets the design requirement according to the temperature distribution information comprises judging whether the temperature difference between the average temperature of the wire insertion end and the average temperature of the welding end is larger than a preset temperature difference according to the temperature distribution information, judging that the setting of the oil path operation information does not meet the design requirement if the temperature difference is larger than the preset temperature difference, and otherwise, judging that the setting of the oil path operation information meets the design requirement.
If the temperature distribution information judges that the temperature difference between the average temperature of the plug wire end and the average temperature of the welding end is larger than the preset temperature difference, the distribution ratio of the cooling oil flow to the plug wire end and the welding end in the oil path channel cannot meet the design requirement, and the distribution ratio of the cooling oil flow can be adjusted by adjusting the number of the oil spray holes of the oil spray ring and the aperture of each oil spray hole, so that the number of the oil spray holes and the aperture (namely the oil path operation information) of each oil spray hole can be judged to be set to be not meet the design requirement.
Further, after it is determined that the setting of the oil path operation information does not meet the design requirement, the step 4 is returned to replace the oil injection ring to adjust the number of the oil injection holes and the set value of the aperture of each oil injection hole in the oil path operation information, so as to perform the next round of simulation and judgment.
And the oil spraying rings are replaced to adjust the quantity of the oil spraying holes in the oil way operation information and the set value of the aperture of each oil spraying hole, so as to adjust the distribution proportion of the oil way channel to the cooling oil flow of the plug wire end and the welding end.
Drawings
FIG. 1 is a block diagram of the assembly of a stator, rotor, shaft, housing and end cap of the present invention;
FIG. 2 is a schematic view of the assembly of the housing, end cap and oil pump unit of the present invention;
FIG. 3 is a schematic view of the end cap of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
fig. 5 is a temperature sensor arrangement diagram of the wire insertion end of the stator winding in embodiment 2;
fig. 6 is a temperature sensor arrangement diagram of the welded ends of the stator windings in embodiment 2;
FIG. 7 is a schematic view of the oil pump according to the present invention;
FIG. 8 is a schematic view of the structure of the oil spray ring in embodiment 2;
Wherein, 1-stator, 2-rotor, 3-rotating shaft, 4-shell, 5-end cover, 6-oil pump unit, 7-oil injection ring, 8-first temperature sensor group;
11-stator winding, 12-iron core;
111-connecting copper bars;
41-an axial oil groove, 42-an oil inlet and 43-an annular oil groove;
51-an oil outlet, 52-a wire outlet hole and 53-a bearing chamber oil duct;
61-oil pipe, 62-oil cooler, 63-oil pump;
611-a flow meter;
621-a second temperature sensor, 622-an oil circuit base;
631-oil collection box, 632-visual window, 633-oil filter;
71-oil spray hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention:
Example 1
The embodiment 1 provides a calibration test method of an oil-cooled motor, which comprises the following steps:
The method comprises the steps of 1, arranging a plurality of first temperature sensor groups 8 for feeding back first temperature information at least one position among a stator winding 11 of an oil cooling motor, an iron core 12 of a stator 1 of the oil cooling motor and a connection copper bar 111 of the stator winding 11;
step 2, as shown in fig. 1, installing a stator 1, a rotor 2 and a rotating shaft 3 of the oil-cooled motor in a shell 4 for simulating an oil-cooled motor shell;
Step 3, as shown in fig. 1 and 2, an end cover 5 is arranged at one end of a shell 4, a stator 1, a rotor 2 and a rotating shaft 3 are enclosed in a sealed space enclosed by the shell 4 and the end cover 5, an oil path channel is arranged in the sealed space, and the oil path channel is externally connected with an oil pump unit 6;
step 4, setting motor operation information and oil circuit operation information of a calibration test;
step 5, controlling the stator 1, the rotor 2 and the rotating shaft 3 to simulate the motor operation of the oil-cooled motor based on the set motor operation information, and simultaneously enabling the cooling oil to operate in an oil path channel based on the set oil path operation information to simulate the actual operation of the cooling oil in a cooling system of the oil-cooled motor;
And 6, judging whether the setting of the oil way operation information meets the design requirement according to the temperature distribution information, if so, returning to the step 4, adjusting the set value of the motor operation information to perform the next round of simulation and judgment, and if not, returning to the step 4, adjusting the set value of the oil way operation information to perform the next round of simulation and judgment.
According to the calibration test method, an end cover 5 is arranged at one end of a shell 4, and a stator 1, a rotor 2 and a rotating shaft 3 are enclosed in a sealed space enclosed by the shell 4 and the end cover 5 to manufacture a prototype of the oil-cooled motor;
the stator 1, the rotor 2 and the rotating shaft 3 simulate the operation of the oil-cooled motor under specific working conditions (such as, but not limited to, rated torque, rated rotating speed, peak power and the like) by controlling the stator 1, the rotor 2 and the rotating shaft 3 based on the set motor operation information;
The actual operation of the cooling oil in the cooling system of the oil-cooled motor is simulated by the operation of the cooling oil in the oil path channel through the set oil path operation information, so that the actual operation of the cooling system of the oil-cooled motor under various working conditions is simulated by the operation of a prototype of the oil-cooled motor;
In the simulation process, the oil circuit operation information comprises one or more of the design parameters of the cooling system of the oil cooling motor (such as total oil quantity of cooling oil circulated in the cooling system, output flow rate of cooling oil conveyed by an oil pump, aperture of an oil inlet of a motor shell, aperture of an oil outlet of the motor shell, aperture of oil holes on an oil injection ring, quantity of oil holes on the oil injection ring, flow distribution of cooling oil conveyed to a main heat source inside the motor by the cooling system and the like), and in the step 1, a plurality of first temperature sensor groups 8 are arranged at least one position of a stator winding 11 of the oil cooling motor, a core 12 of a stator 1 of the oil cooling motor and a connecting copper bar 111 of the stator winding 11 according to analysis and verification requirements to obtain temperature distribution information, so that the actual cooling effect of the cooling oil in the simulation process is analyzed and verified, and the specific guidance, verification and optimization of the relevant design parameters of the cooling system in the design scheme of the oil cooling motor can be realized through a calibration test method of the oil cooling motor.
The oil passage operation information includes, among others, the total oil amount of the cooling oil circulated in the oil passage and the output flow rate of the oil pump unit 6.
Correspondingly, the setting of the motor operation information is satisfied that the stator 1, the rotor 2 and the rotating shaft 3 can be controlled to simulate the operation of the oil-cooled motor under specific working conditions (such as, but not limited to, rated torque, rated rotating speed, peak power and the like), and the stator 1, the rotor 2 and the rotating shaft 3 can be controlled to simulate the operation of the oil-cooled motor under different working conditions by adjusting the set values of the motor operation information (such as, but not limited to, the motor operation information comprises the rotating speed and the torque of the rotating shaft 3, or the motor operation information comprises the input voltage and the input current of the stator winding 11).
In the present embodiment 1, the motor operation information includes the rotational speed and torque of the rotating shaft 3.
Wherein, step 5 comprises the following sub-steps:
S1, controlling an oil pump unit 6 based on set oil path operation information (total oil quantity of cooling oil circulating in an oil path and output flow rate of the oil pump unit 6), enabling the cooling oil to be pumped into the oil path, and enabling the cooling oil to stably circulate in the oil path;
S2, controlling the operation of the stator 1, the rotor 2 and the rotating shaft 3 based on the set motor operation information so as to heat the copper bar 111, the stator winding 11 and the iron core 12;
and S3, after the fluctuation values of the first temperature information fed back by each first temperature sensor group in the set time are smaller than the set value, the first temperature information obtained at the moment is corresponding to the arrangement positions of each first temperature sensor group, and temperature distribution information is obtained.
When the fluctuation values of the first temperature information fed back by the first temperature sensor group in the predetermined time are smaller than the set value, that is, when the position provided with the first temperature sensor group 8 reaches the heat balance.
As shown in fig. 2 and 7, the oil pump unit 6 includes an oil pipe 61, an oil cooler 62 mounted on the oil pipe 61, and an oil pump 63, wherein an oil collecting box 631 is integrated on the oil pump 63, the oil collecting box 631 is used for storing cooling oil, and the oil pump 63 is used for pumping the cooling oil in the oil collecting box 631 into an oil path channel after conveying the cooling oil to the oil cooler 62 for cooling, and pumping the cooling oil in the oil path channel into the oil collecting box 631;
Preferably, in embodiment 1, the oil pump 63 is further provided with an oil filter 633, the oil pump 63 conveys the cooling oil in the oil collecting box 631 to the oil filter 633 for filtering, and then conveys the cooling oil to the oil cooler 62 for cooling, and pumps the cooling oil into the oil path channel, and pumps the cooling oil in the oil path channel into the oil collecting box 631, so that the cooling oil circulates in the oil path channel;
As shown in fig. 2, the oil pipe 61 is provided with a flowmeter 611, the flowmeter 611 is used for obtaining flow information of the cooling oil conveyed by the oil pump 63, the oil cooler 62 is provided with a second temperature sensor 621 used for obtaining second temperature information of the cooling oil cooled by the oil cooler 62, and the oil collecting box 631 and the oil cooler 62 are respectively provided with a visual window which is sealed by a transparent acrylic plate;
In the embodiment 1, the oil collecting box 631 is provided with a visual window 632, the visual window 632 is sealed by a transparent acrylic plate, the oil cooler 62 is provided with an oil way base 622, the oil way base 622 is made of the transparent acrylic plate and is used as the visual window of the oil cooler 62;
wherein, the step S1 comprises the following substeps:
s101, adding cooling oil with corresponding oil quantity into an oil collecting box 631 according to the total oil quantity in oil path operation information (the total oil quantity of the cooling oil circulated in an oil path and the output flow of an oil pump unit 6);
s102, opening the oil pump 63 and the oil cooler 62, and controlling the rotation speed value of the oil pump 63 to enable the flow information fed back by the flowmeter 611 to be consistent with the flow in the oil path operation information (the total oil quantity of the cooling oil circulated in the oil path and the output flow of the oil pump unit 6);
s103, detecting second temperature information, judging whether the value of the temperature value of the cooling oil cooled by the oil cooler 62 is in a first range, if so, entering S104, otherwise, returning to S103;
S104, judging whether the cooling oil circulation is cutoff or not through the visual window (namely the visual window 632 and the oil path base 622), and judging that the cooling oil stably circulates in the oil path channel if the cooling oil circulation is not cutoff and the oil is not coiled.
In step 6, the method for judging whether the setting of the oil path operation information (the total oil amount of the cooling oil circulating in the oil path and the output flow rate of the oil pump unit 6) meets the design requirement according to the temperature distribution information includes judging whether the temperatures fed back by the first temperature sensor groups 8 are lower than the preset temperatures corresponding to the positions set by the first temperature sensor groups 8 according to the temperature distribution information, if the temperatures are lower than the preset temperatures, judging that the setting of the oil path operation information (the total oil amount of the cooling oil circulating in the oil path and the output flow rate of the oil pump unit 6) meets the design requirement, otherwise, judging that the setting of the oil path operation information (the total oil amount of the cooling oil circulating in the oil path and the output flow rate of the oil pump unit 6) does not meet the design requirement.
Example 2:
This embodiment 2 is implemented based on the calibration test method of the oil-cooled motor provided in embodiment 1.
Unlike embodiment 1, in embodiment 2, the oil passage operation information includes the number of the oil jet holes 71 of the oil jet ring 7 and the aperture of each oil jet hole 71.
Correspondingly, the setting of the motor operation information is satisfied that the stator 1, the rotor 2 and the rotating shaft 3 can be controlled to simulate the operation of the oil-cooled motor under specific working conditions (such as, but not limited to, rated torque, rated rotating speed, peak power and the like), and the stator 1, the rotor 2 and the rotating shaft 3 can be controlled to simulate the operation of the oil-cooled motor under different working conditions by adjusting the set values of the motor operation information (such as, but not limited to, the motor operation information comprises the rotating speed and the torque of the rotating shaft 3, or the motor operation information comprises the input voltage and the input current of the stator winding 11).
In this embodiment 2, the motor operation information includes the rotational speed and torque of the rotating shaft 3.
As shown in fig. 5 and 6, in the present embodiment 2, in step 1, a plurality of first temperature sensor groups 8 provided on the stator winding of the oil-cooled motor include a plurality of temperature sensors provided on the wire insertion end of the stator winding 11, a plurality of temperature sensors provided on the welding end of the stator winding 11, and a plurality of temperature sensors provided on the connection copper bar 111 of the welding end of the stator winding 11;
In fig. 5 and 6, only one arrangement is provided for the arrangement position of the first temperature sensor group 8, and the protection scope of the present invention is not limited.
As shown in fig. 1, in step2, the casing 4 is sleeved outside the iron core 12 of the stator 1 and is in interference fit with the iron core 12;
as shown in fig. 1, in step 3, an oil spray ring 7 is also installed between the end cap 5 and the core 12;
As shown in fig. 1,2 and 3, the oil passage includes a plurality of annular oil grooves 43 opened in the circumferential direction and a plurality of axial oil grooves 41 opened in the axial direction on the inner peripheral surface of the casing 4, the annular oil grooves 43 and the axial oil grooves 41 communicate, an oil inlet 42 and an oil outlet 51 of the oil passage are provided on the casing 4 or the end cover 5 (in this embodiment 2, as shown in fig. 1,2 and 3, the oil inlet 42 is provided on the casing 4, the oil outlet 51 is provided on the end cover 5), the oil pump unit 6 delivers cooling oil to the annular oil grooves 43 and the axial oil grooves 41 through the oil inlet 42, and the oil pump unit 6 withdraws the cooling oil in the oil passage through the oil outlet 51;
As shown in fig. 1, the axial oil groove 41 and the annular oil groove 43 are used for matching with the outer circumferential surface of the iron core 12, the axial two ends of the axial oil groove 41 respectively exceed the axial two ends of the iron core 12, the end of the axial oil groove 41 away from the end cover 5 is used for conveying cooling oil to the end of the stator winding 11 away from the end cover 5 (in the embodiment 2, namely the welding end of the stator winding 11), and the end of the axial oil groove 41 close to the end cover 5, the oil cavity is surrounded by the shell 4, the oil injection ring 7 and the iron core 12;
As shown in fig. 8, a plurality of oil spray holes 71 are circumferentially distributed on the oil spray ring 7, one end of the oil spray holes 71 communicates with the oil chamber, and the other end of the oil spray holes 71 faces the end of the stator winding 11 near the end cap 5 (in this embodiment 2, i.e., the wire insertion end of the stator winding 11).
By making the axial both ends of the axial oil groove 41 respectively exceed the axial both ends of the iron core 12, the end of the axial oil groove 41 away from the end cover is used for conveying the cooling oil to the end of the stator winding 11 away from the end cover 5 (in this embodiment 2, i.e. the welding end of the stator winding 11), and the end of the axial oil groove 41 close to the end cover 5 encloses an oil cavity with the housing 4, the oil injection ring 7 and the iron core 12, i.e. the cooling oil can be conveyed to the end of the stator winding 11 close to the end cover 5 (in this embodiment 2, i.e. the wire insertion end of the stator winding 11) through the oil injection hole 71 on the oil injection ring 7;
Meanwhile, the axial thickness of the oil spraying ring 7 can be adjusted, so that the shell 4 can be matched with various stators 1 with different axial lengths under the same radius.
In step 6, the method for judging whether the setting of the oil path operation information (the number of the oil holes 71 of the oil spray ring 7 and the aperture of each oil hole 71) meets the design requirement according to the temperature distribution information includes judging whether the temperature difference between the average temperature of the wire insertion end of the stator winding 11 and the average temperature of the welding end of the stator winding 11 is larger than a first preset temperature difference according to the temperature distribution information, if so, judging that the setting of the oil path operation information (the number of the oil holes 71 of the oil spray ring 7 and the aperture of each oil hole 71) does not meet the design requirement, otherwise, judging that the setting of the oil path operation information (the number of the oil holes 71 of the oil spray ring 7 and the aperture of each oil hole 71) meets the design requirement.
According to the above method, when it is determined by the temperature distribution information that the temperature difference between the average temperature of the plug terminal and the average temperature of the weld terminal is greater than the first preset temperature difference, it is indicated that the distribution ratio of the cooling oil flow rates to the plug terminal and the weld terminal at the oil passage cannot meet the design requirement, and the distribution ratio of the cooling oil flow rates may be adjusted by adjusting the number of the oil holes 71 of the oil spray ring 7 and the aperture of each oil hole 71, so it may be determined that the number of the oil holes 71 and the aperture of each oil hole 71 (i.e., the oil passage operation information) are set so as not to meet the design requirement.
In step 6, the method for judging whether the setting of the oil path operation information (the number of the oil holes 71 of the oil spray ring 7 and the aperture of each oil hole 71) meets the design requirement according to the temperature distribution information further comprises judging whether the temperature difference between the highest temperature of the plug end of the stator winding 11 and the highest temperature of the welding end of the stator winding 11 is larger than a second preset temperature difference according to the temperature distribution information, if so, judging that the setting of the oil path operation information (the number of the oil holes 71 of the oil spray ring 7 and the aperture of each oil hole 71) does not meet the design requirement, otherwise, judging that the setting of the oil path operation information (the number of the oil holes 71 of the oil spray ring 7 and the aperture of each oil hole 71) meets the design requirement.
According to the above method, when it is determined by the temperature distribution information that the temperature difference between the highest temperature of the plug terminal and the highest temperature of the weld terminal is greater than the second preset temperature difference, it is indicated that the distribution ratio of the cooling oil flow rates at the oil passage to the plug terminal and the weld terminal cannot meet the design requirement, and the distribution ratio of the cooling oil flow rates may be adjusted by adjusting the number of the oil holes 71 of the oil spray ring 7 and the aperture of each oil hole 71, so it may be determined that the number of the oil holes 71 and the aperture of each oil hole 71 (i.e., the oil passage operation information) are set so as not to meet the design requirement.
After it is determined that the setting of the oil path operation information does not meet the design requirement, the process returns to step 4, and the oil spray ring 7 is replaced to adjust the number of the oil spray holes 71 in the oil path operation information and the set value of the aperture of each oil spray hole 71, so as to perform the next round of simulation and determination.
The number of the oil spray holes 71 and the set values of the apertures of the oil spray holes 71 in the oil passage operation information are adjusted by replacing the oil spray ring 7, so that the distribution proportion of the cooling oil flow of the oil passage to the plug end and the welding end is adjusted.
Preferably, in embodiment 2, as shown in fig. 3, the upper portion of the end cover 5 is provided with a wire outlet hole 52 for the wire outlet of the first temperature sensor group 8 disposed at one end of the stator winding 11 near the end cover 5 (in embodiment 2, the wire insertion end of the stator winding 11), and the wire outlet hole 52 is provided at the upper portion of the end cover 5, so that no cooling oil is caused to flow out.
Preferably, in embodiment 2, as shown in fig. 1, 3 and 4, a bearing chamber 53 for installing the rotating shaft 3 and the bearing is provided on the end cover 5, a bearing chamber oil passage 54 is provided in the end cover 5, one end of the bearing chamber oil passage 54 is communicated with the oil inlet 42, the other end of the bearing chamber oil passage 54 is communicated with the bearing chamber 53, and by providing the bearing chamber oil passage 54, part of cooling oil can be delivered to the bearing chamber 53 to cool the bearing in the bearing chamber 53 for connecting the rotating shaft 3 and the end cover 5.
The calibration test method of the oil cooling motor provided by the invention has at least the following technical effects or advantages:
1. The method comprises the steps of enabling oil circuit operation information to comprise one or more of the design parameters of a cooling system of an oil cooling motor (such as total oil quantity of cooling oil circulated in the cooling system, output flow of cooling oil conveyed by an oil pump, aperture of an oil inlet of a motor shell, aperture of an oil outlet of the motor shell, aperture of oil spraying holes on an oil spraying ring, number of the oil spraying holes on the oil spraying ring, flow distribution of the cooling system to cooling oil conveyed to a main heat source inside the motor and the like), arranging a plurality of first temperature sensor groups 8 at least one position of a stator winding 11 of the oil cooling motor, a core 12 of a stator 1 of the oil cooling motor and a connecting copper bar 111 of the stator winding 11 according to analysis and verification requirements to obtain temperature distribution information, and analyzing and verifying actual cooling effect of the cooling oil in the simulation process, namely, through a calibration test method of the oil cooling motor, realizing targeted guidance, verification and optimization of all relevant design parameters of the cooling system in a design scheme of the oil cooling motor.
2. By providing the visual window (namely the visual window 632 and the oil path base 622), whether the cooling oil is in circulation or not is judged, whether the oil is in gas or not is judged, and whether the cooling oil stably circulates in the oil path channel or not is judged.
3. After the oil way operation information is set, according to the requirement of analysis and verification, a plurality of first temperature sensor groups 8 are correspondingly arranged at least one position among the stator winding 11 of the oil cooling motor, the iron core 12 of the stator 1 of the oil cooling motor and the connection copper bar 111 of the stator winding 11, so that the acquired temperature distribution information has more pertinence to the oil way operation information set by the analysis and verification.
4. By providing the bearing chamber oil passage 54, part of the cooling oil can be delivered to the bearing chamber 53, and the bearing in the bearing chamber 53 for connecting the rotating shaft 3 and the end cover 5 can be cooled.
5. The axial two ends of the axial oil groove 41 respectively exceed the axial two ends of the iron core 12, one end, far away from the end cover, of the axial oil groove 41 is used for conveying cooling oil to one end, far away from the end cover 5, of the stator winding 11, one end, close to the end cover 5, of the axial oil groove 41 encloses an oil cavity with the shell 4, the oil injection ring 7 and the iron core 12, so that the cooling oil is conveyed to one end, close to the end cover 5, of the stator winding 11 through the oil injection holes 71 on the oil injection ring 7, meanwhile, the shell 4 can be matched with various stators 1 with different axial lengths under the same radius through adjusting the axial thickness of the oil injection ring 7, the applicability of the shell 4 and the end cover 5 is improved, the development cost is reduced, and the development period is shortened.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited at all, and the technical solution formed by adopting equivalent transformation or equivalent substitution falls within the protection scope of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211345194.XA CN115549336B (en) | 2022-10-31 | 2022-10-31 | Calibration test method for oil-cooled motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211345194.XA CN115549336B (en) | 2022-10-31 | 2022-10-31 | Calibration test method for oil-cooled motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115549336A CN115549336A (en) | 2022-12-30 |
| CN115549336B true CN115549336B (en) | 2025-09-19 |
Family
ID=84718606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211345194.XA Active CN115549336B (en) | 2022-10-31 | 2022-10-31 | Calibration test method for oil-cooled motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115549336B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116106741A (en) * | 2023-02-20 | 2023-05-12 | 襄阳达安汽车检测中心有限公司 | Oil cooling method and system for drive motor bench test |
| CN116760238B (en) * | 2023-08-11 | 2023-11-07 | 大澳电器（江苏）有限公司 | Oil-cooled motor cooling system |
| CN117388694B (en) * | 2023-12-13 | 2024-02-27 | 徐州鸿润达电动车有限公司 | A method for monitoring the operating temperature of oil-cooled motors |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013207957A (en) * | 2012-03-29 | 2013-10-07 | Fuji Heavy Ind Ltd | Motor cooling device |
| CN114987371A (en) * | 2022-07-22 | 2022-09-02 | 奇瑞新能源汽车股份有限公司 | Temperature protection method and system for oil-cooled electric driving device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8169110B2 (en) * | 2009-10-09 | 2012-05-01 | GM Global Technology Operations LLC | Oil cooled motor/generator for an automotive powertrain |
| CN111799950A (en) * | 2020-07-22 | 2020-10-20 | 中车株洲电机有限公司 | New energy automobile, driving motor oil cooling system and control method |
-
2022
- 2022-10-31 CN CN202211345194.XA patent/CN115549336B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013207957A (en) * | 2012-03-29 | 2013-10-07 | Fuji Heavy Ind Ltd | Motor cooling device |
| CN114987371A (en) * | 2022-07-22 | 2022-09-02 | 奇瑞新能源汽车股份有限公司 | Temperature protection method and system for oil-cooled electric driving device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115549336A (en) | 2022-12-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115549336B (en) | Calibration test method for oil-cooled motor | |
| CN206237254U (en) | Motor liquid cooling structure | |
| CN209818295U (en) | Pump device | |
| CN106855051A (en) | The fluid pump of motor-driven | |
| CN103636103A (en) | Rotating electrical machine | |
| US6239518B1 (en) | AC generator for vehicle | |
| CN106411051A (en) | Water cooling system of motor and controller integrated structure | |
| EP2879278B1 (en) | Versatile cooling housing for an electrical motor | |
| CN106640673A (en) | Electric drive pump | |
| CN112290742A (en) | Motor unit and method for manufacturing motor unit | |
| CN107248789A (en) | Stator module, motor, the assemble method of electronic water pump and stator | |
| CN203574501U (en) | Cooling motor | |
| CN103765732A (en) | Electric motor | |
| JP2022511021A (en) | Axial magnetic flux motor water pump | |
| CN115276302A (en) | Oil-cooled motor and overheating protection method thereof | |
| CN114977555B (en) | Stator assembly and motor | |
| WO2025139623A1 (en) | Driving electric motor having end of stator winding subjected to immersion cooling, power assembly, and electric vehicle | |
| CN219268584U (en) | Driving motor and vehicle | |
| AU2025201574A1 (en) | Axial flux motor having a mechanically independent stator | |
| CN210509586U (en) | pump unit | |
| CN212033944U (en) | Oil-cooled casing and oil-cooled motor | |
| CN104682623A (en) | Series motor | |
| CN105429337A (en) | Motor | |
| US11444522B2 (en) | Synchronous electrical machine with rotor having angularly shifted portions | |
| CN116191764A (en) | Rotating electrical machine integrated with a speed reducer housing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |