CN104198086B - Winding temperature rise test method and device - Google Patents
Winding temperature rise test method and device Download PDFInfo
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- CN104198086B CN104198086B CN201410419407.8A CN201410419407A CN104198086B CN 104198086 B CN104198086 B CN 104198086B CN 201410419407 A CN201410419407 A CN 201410419407A CN 104198086 B CN104198086 B CN 104198086B
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- 238000004804 winding Methods 0.000 title claims abstract description 93
- 238000010998 test method Methods 0.000 title abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 55
- 238000005070 sampling Methods 0.000 claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a winding temperature rise test device. The winding temperature rise test device comprises a control unit, a temperature sensing unit, a first switch, a second switch and an interface unit, wherein the interface unit is provided with a power interface, a load interface and a sampling interface, the power interface is connected with a load power source, the load interface is connected with a to-be-tested load, the sampling interface is connected with the control unit, the first switch is arranged between the sampling interface and the control unit in a connecting mode, the first switch is provided with a controlled end, the controlled end of the first switch is connected with the control unit, the second switch is arranged between the power interface and the load power source in the connecting mode, the second switch is provided with a controlled end, the controlled end of the second switch is connected with the control unit, and the temperature sensing unit is connected with the control unit and used for measuring environment temperature. The invention further discloses a winding temperature rise test method. The winding temperature rise test device is low in costs and convenient to operate.
Description
Technical Field
The invention relates to the field of testing, in particular to a winding temperature rise testing method and device.
Background
For an electric appliance having a coil winding, such as a motor or a transformer, the rated capacity is usually determined by the maximum allowable temperature that can be endured by the winding insulation, so that the winding of the electric appliance needs to be subjected to a temperature rise test to obtain the maximum allowable temperature that can be endured by the electric appliance.
The winding temperature rise test generally includes testing the resistance value and the temperature value of the winding in a cold state and a hot state, and then substituting the resistance value and the temperature value into a preset formula to calculate the temperature rise value. The existing method for testing the thermal state resistance of the winding generally comprises two methods, namely a live winding temperature rise tester and a universal meter. The first method, however, is complicated to operate, and as shown in fig. 1, requires breaking the winding leads and connecting a hot winding tester with a current between the power supply and the windings, especially for testing a two-winding motor. In addition, when the test object is a capacitor running asynchronous motor, the secondary winding is connected with the motor running capacitor in series after being merged into the test loop, so that the voltage distributed to the secondary winding is reduced, the voltage is different from the voltage in actual running, the temperature rise test result is influenced, and the cost for purchasing equipment is high. The second method has larger test error, and the resistance value can be measured only by powering off, stopping the load and disconnecting the loop which has influence on the test resistance value during the test, and the speed of the actions has influence on the test result.
Disclosure of Invention
The invention mainly aims to solve the technical problems of complex operation and inaccurate test of the winding temperature rise test method in the prior art.
In order to achieve the above object, the present invention provides a winding temperature rise testing device, comprising: the temperature sensing device comprises a control unit, a temperature sensing unit, a first switch, a second switch and an interface unit; wherein,
the interface unit is provided with a power supply interface, a load interface and a sampling interface, the power supply interface is connected with a load power supply, the load interface is connected with a load to be tested, and the sampling interface is connected with the control unit;
the first switch is connected between the sampling interface and the control unit and is also provided with a controlled end, and the controlled end of the first switch is connected with the control unit;
the second switch is connected between the power interface and a load power supply, and is also provided with a controlled end, and the controlled end of the second switch is connected with the control unit;
the temperature sensing unit is connected with the control unit and used for measuring the ambient temperature.
Preferably, the control unit includes a plurality of AD interfaces and I/O interfaces, wherein the AD interfaces are correspondingly connected to the sampling interface unit and the temperature sensing unit of the interface unit, and the I/O interfaces are correspondingly connected to the controlled end of the first switch and the controlled end of the second switch.
Preferably, the winding temperature rise testing device further comprises a display module, and the display module is connected with the control unit and used for displaying data to be displayed by the control unit.
Preferably, the load is a capacitor running asynchronous motor and a running capacitor, the interface unit includes a capacitor interface connected to the running capacitor, the winding temperature rise testing device further includes a third switch connected between the running capacitor and the capacitor interface, the third switch includes a controlled end, and the controlled end of the third switch is connected to the control unit.
Preferably, the load is a solenoid valve.
In addition, in order to achieve the above purpose, the invention also provides a method for testing the temperature rise of the winding, which comprises the following steps:
the control unit controls the first switch to be closed;
the control unit controls the sampling interface to collect the cold resistance of the load and controls the temperature sensing unit to collect the first environment temperature;
the control unit controls the first switch to be switched off and controls the second switch to be switched on, and timing is started;
when the first preset time is up, the control unit controls the second switch to be switched off;
delaying a second preset time, and controlling the first switch to be closed by the control unit;
the control unit controls the sampling interface to collect the thermal state resistance of the load and controls the temperature sensing unit to collect the second environment temperature;
and the control unit substitutes the cold-state resistor, the hot-state resistor, the first environment temperature and the second environment temperature into a preset formula to calculate and obtain the winding temperature rise of the load.
Preferably, the step of calculating the winding temperature rise of the load by the control unit further includes:
and the control unit controls and displays the winding temperature rise obtained through calculation.
Preferably, the load is a capacitor running asynchronous motor and a running capacitor, the cold resistance of the load comprises a main winding cold resistance and an auxiliary winding cold resistance, and the hot resistance of the load comprises a main winding hot resistance and an auxiliary winding hot resistance.
Preferably, the load is a solenoid valve.
Preferably, the first preset time is 0.5-4 hours, and the second preset time is 1-10 seconds.
According to the embodiment of the invention, the control unit controls the first switch and the second switch to be turned on or off so as to acquire the cold resistance and the hot resistance of the winding of the load to be measured, and the temperature sensing unit is used for acquiring the ambient temperature, so that the temperature rise of the winding of the load to be measured can be calculated and obtained according to the cold resistance, the hot resistance and the ambient temperature. The winding temperature rise testing device provided by the embodiment of the invention is low in cost and convenient to operate.
Drawings
FIG. 1 is a schematic structural diagram of a conventional winding during temperature rise test;
FIG. 2 is a schematic diagram of a functional module of the winding temperature rise testing device according to the present invention;
FIG. 3 is a schematic structural diagram of the winding temperature rise test device of the present invention applied to a capacitor running asynchronous motor;
FIG. 4 is a schematic structural diagram of the winding temperature rise test device applied to the solenoid valve;
FIG. 5 is a schematic flow chart of a first embodiment of a method for measuring a temperature rise of a winding according to the present invention;
fig. 6 is a schematic flow chart of a method for testing temperature rise of a winding according to a second embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a winding temperature rise testing device. As shown in fig. 2, the winding temperature rise test device may include: a control unit 10, a temperature sensing unit 20, a first switch 30, a second switch 40, and an interface unit 50; wherein,
the interface unit 50 is provided with a power supply interface 51, a load interface 52 and a sampling interface 53, wherein the power supply interface 51 is connected with a load power supply 80, the load interface 52 is connected with a load 90 to be tested, and the sampling interface 53 is connected with the control unit 10;
the first switch 30 is connected between the sampling interface 53 and the control unit 10, and the first switch 30 further has a controlled terminal 31, and the controlled terminal 31 of the first switch 30 is connected with the control unit 10;
the second switch 40 is connected between the power interface 51 and the load power source 80, and the second switch 40 further has a controlled end 41, and the controlled end 41 of the second switch 40 is connected to the control unit 10;
the temperature sensing unit 20 is connected to the control unit 10, and is configured to measure an ambient temperature.
In particular, the control unit 10 may comprise several AD interfaces and several I/O interfaces. The AD interface is correspondingly connected to the sampling interface 53 of the interface unit 50 and the temperature sensing unit 20, and the I/O interface is correspondingly connected to the controlled terminal 31 of the first switch 30 and the controlled terminal 41 of the second switch 40. The AD interface is used for carrying out digital-to-analog conversion on the data collected by the AD interface.
In the embodiment of the present invention, the control unit 10 controls the first switch 30 and the second switch 40 to be turned on or off to collect the cold resistance and the hot resistance of the winding of the load 90 to be measured, and the temperature sensing unit 20 is used to obtain the ambient temperature, so that the temperature rise of the winding of the load to be measured can be calculated and obtained according to the cold resistance, the hot resistance and the ambient temperature. The winding temperature rise testing device provided by the embodiment of the invention is low in cost and convenient to operate.
Further, the winding temperature rise testing device further comprises a display module 60 connected with the control unit. The display module 60 is configured to display data to be displayed by the control unit 10, for example, the control unit 10 controls the cold resistance and the hot resistance collected by the sampling interface 53, the ambient temperature collected by the temperature sensing unit 20, and the temperature rise calculated by the control unit 10.
As shown in fig. 3, the load 90 to be tested applied by the winding temperature rise testing apparatus can be a capacitor running asynchronous motor 91 and a running capacitor 92 matched with the capacitor running asynchronous motor. Due to the structure of the load 90 to be tested, the interface unit 50 adapted to the load to be tested further includes a capacitor interface 54 connected to the operating capacitor, and the winding temperature rise testing apparatus further includes a third switch 70 connected between the operating capacitor 92 and the capacitor interface 51, where the third switch 70 includes a controlled end 71, and the controlled end 71 of the third switch 70 is connected to the control unit 10.
It will be appreciated that since the control unit 10 controls the second switch 40 for controlling the supply or the disconnection of the capacitor-run asynchronous motor 91, the third switch 70 will also be controlled at the same time when the second switch 40 is controlled. Thus, the controlled terminal 71 of the third switch 70 and the controlled terminal 41 of the second switch 40 may be controlled by the same I/O interface of the control unit 10.
Since the capacitor-operated asynchronous motor has a main winding and an auxiliary winding inside, the sampling interface 53 of the interface unit 50 will include a main winding sampling interface 531 and an auxiliary winding sampling interface 532 to obtain the resistances of the main winding and the auxiliary winding.
As shown in fig. 4, the load 90 to be tested applied by the winding temperature rise testing device may also be a solenoid valve. Due to the structure of the load 90 to be tested, the interface unit 50 adapted thereto only includes the power interface 51, the sampling interface 53, and the load interface 52.
Correspondingly, based on the above device for testing the winding temperature rise, the invention also provides a method for testing the winding temperature rise, as shown in fig. 5, the method for testing the winding temperature rise comprises the following steps:
s101, a control unit controls a first switch to be closed;
s102, controlling a sampling interface to collect a cold resistance R1 of a load by a control unit, and controlling a temperature sensing unit to collect a first environment temperature T1;
step S103, the control unit controls the first switch to be switched off, controls the second switch to be switched on and starts timing;
step S104, when the first preset time is up, the control unit controls the second switch to be switched off;
step S105, after delaying a second preset time, the control unit controls the first switch to be closed;
s106, controlling a sampling interface to acquire a thermal state resistor R2 of a load by a control unit, and controlling a temperature sensing unit to acquire a second ambient temperature T2;
and S107, substituting the cold resistor R1, the hot resistor R2, the first environment temperature T1 and the second environment temperature T2 into a preset formula by the control unit, and calculating to obtain the winding temperature rise of the load.
The setting of the first preset time is specifically set according to different loads to be measured. In this embodiment, the first preset time is 0.5 to 4 hours. For example, when the load to be measured is a capacitor running asynchronous motor and a running capacitor, the first preset time is 4 hours. When the load to be measured is an electromagnetic valve, the first preset time is 30 minutes.
The second preset time cannot be too short or too long. If the delay time is set to be too short, the counter electromotive force generated by rotation will influence the test data because the inertia is still rotating after the motor is powered off; if the delay time is set too long, the resistance of the winding will be reduced a lot, which affects the accuracy of the test. In this embodiment, the second preset time is 1-10 seconds.
In the step S106, the control unit controls the sampling interface to obtain the winding resistance value every M seconds, and obtains the ambient temperature T2N times in total. Wherein the value range of M is 0.1-2, and the value range of N is 2-15. The thermal resistance R2 of the winding is then calculated according to the following formula:
R2＝X1+(T/S)*(((X1-X2)+(X2-X3)+…+(Xn-1-Xn))/(N-1))
wherein T is delay time, S is the collection interval of the thermal state resistor of the AD sampling interface collection winding, N is the collection frequency, and Xn is the resistance (ohm) of the nth sampling.
In step S107, after obtaining the cold resistance R1, the hot resistance R2, the first ambient temperature T1, and the second ambient temperature T2 of the load winding, the obtained values are substituted into the following formula to calculate and obtain the winding temperature rise Δ T:
wherein Ka is a constant, which takes different values according to the winding material of the load to be measured, for example, Ka is 234.5 for a copper winding; for aluminum windings, Ka is 228.2.
Further, as shown in fig. 6, the method for testing the winding temperature rise further includes, after the step S107:
and S108, the control unit controls and displays the winding temperature rise obtained through calculation.
After the winding temperature rise is obtained through calculation, a display module in the testing device capable of controlling the winding temperature rise can display the temperature rise so as to be checked by a tester.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a winding temperature rise testing arrangement which characterized in that, winding temperature rise testing arrangement includes: the temperature sensing device comprises a control unit, a temperature sensing unit, a first switch, a second switch and an interface unit; wherein,
the interface unit is provided with a power supply interface, a load interface and a sampling interface, the power supply interface is connected with a load power supply, the load interface is connected with a load to be tested, and the sampling interface is connected with the control unit;
the first switch is connected between the sampling interface and the control unit and is also provided with a controlled end, and the controlled end of the first switch is connected with the control unit;
the second switch is connected between the power interface and a load power supply, and is also provided with a controlled end, and the controlled end of the second switch is connected with the control unit;
the temperature sensing unit is connected with the control unit and used for measuring the ambient temperature.
2. The winding temperature rise testing device according to claim 1, wherein the control unit comprises a plurality of AD interfaces and I/O interfaces, wherein the AD interfaces are correspondingly connected with the sampling interface and the temperature sensing unit of the interface unit, and the I/O interfaces are correspondingly connected with the controlled end of the first switch and the controlled end of the second switch.
3. The winding temperature rise test device of claim 1, further comprising a display module connected to the control unit for displaying data to be displayed by the control unit.
4. The winding temperature rise test device of claim 1, wherein the load is a capacitor-run asynchronous motor and a run capacitor, wherein the interface unit comprises a capacitor interface connected to the run capacitor, the winding temperature rise test device further comprises a third switch connected between the run capacitor and the capacitor interface, and the third switch comprises a controlled terminal, and the controlled terminal of the third switch is connected to the control unit.
5. The winding exotherm testing apparatus of claim 1, wherein said load is a solenoid valve.
6. The winding temperature rise testing method is applied to the winding temperature rise testing device according to claim 1, and comprises the following steps:
the control unit controls the first switch to be closed;
the control unit controls the sampling interface to collect the cold resistance of the load and controls the temperature sensing unit to collect the first environment temperature;
the control unit controls the first switch to be switched off and controls the second switch to be switched on, and timing is started;
when the first preset time is up, the control unit controls the second switch to be switched off;
delaying a second preset time, and controlling the first switch to be closed by the control unit;
the control unit controls the sampling interface to collect the thermal state resistance of the load and controls the temperature sensing unit to collect the second environment temperature;
and the control unit substitutes the cold-state resistor, the hot-state resistor, the first environment temperature and the second environment temperature into a preset formula to calculate and obtain the winding temperature rise of the load.
7. The method for testing winding temperature rise according to claim 6, wherein the step of calculating the winding temperature rise of the load by the control unit further comprises the following steps:
and the control unit controls and displays the winding temperature rise obtained through calculation.
8. The method for testing the temperature rise of the winding according to claim 6, wherein the load is a capacitor running asynchronous motor and a running capacitor, the cold resistance of the load comprises a main winding cold resistance and an auxiliary winding cold resistance, and the hot resistance of the load comprises a main winding hot resistance and an auxiliary winding hot resistance.
9. The method for testing temperature rise of windings according to claim 6, wherein said load is a solenoid valve.
10. The method for testing the temperature rise of the winding according to claim 6, wherein the first preset time is 0.5-4 hours, and the second preset time is 1-10 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410419407.8A CN104198086B (en) | 2014-08-22 | 2014-08-22 | Winding temperature rise test method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410419407.8A CN104198086B (en) | 2014-08-22 | 2014-08-22 | Winding temperature rise test method and device |
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| CN104198086A CN104198086A (en) | 2014-12-10 |
| CN104198086B true CN104198086B (en) | 2017-01-25 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104865443B (en) * | 2015-05-12 | 2017-12-26 | 株洲南车时代电气股份有限公司 | The automatic measurement system and its method of work of motor hot resistance |
| CN104977490A (en) * | 2015-07-03 | 2015-10-14 | 巢湖市金辉自控设备有限公司 | Temperature-rise test method for transformer |
| CN105988052B (en) * | 2015-10-23 | 2019-02-22 | 安徽中认倍佳科技有限公司 | Household electrical appliances motor winding temperature rise is in apparatus test device and method |
| CN105548879A (en) * | 2015-12-01 | 2016-05-04 | 珠海格力电器股份有限公司 | Automatic test method and circuit for motor temperature rise and motor |
| CN107255528A (en) * | 2017-06-20 | 2017-10-17 | 山东省医疗器械产品质量检验中心 | A kind of medical electrical equipment direct current winding temperature rise test device and method of testing |
| WO2019079956A1 (en) * | 2017-10-24 | 2019-05-02 | 深圳配天智能技术研究院有限公司 | Rising temperature detection device of robot and method for detecting rising temperature of robot |
| CN111398684B (en) * | 2020-04-30 | 2025-04-08 | 广东海悟科技有限公司 | Motor winding temperature rise testing device based on resistance method |
| CN113267271B (en) * | 2021-05-07 | 2023-11-28 | 广东白云学院 | Thermal state winding temperature rise test system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0228771D0 (en) * | 2002-01-11 | 2003-01-15 | Sii Printek Inc | Temperature control device and temperature control method and ink-jet recording apparatus |
| CN102590747A (en) * | 2012-03-02 | 2012-07-18 | 北京理工大学 | Test system of temperature rise of motor winding and test method of the test system |
| CN103344915A (en) * | 2013-06-27 | 2013-10-09 | 深圳市汇川技术股份有限公司 | Synchronous motor temperature rise test system and method |
-
2014
- 2014-08-22 CN CN201410419407.8A patent/CN104198086B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0228771D0 (en) * | 2002-01-11 | 2003-01-15 | Sii Printek Inc | Temperature control device and temperature control method and ink-jet recording apparatus |
| CN102590747A (en) * | 2012-03-02 | 2012-07-18 | 北京理工大学 | Test system of temperature rise of motor winding and test method of the test system |
| CN103344915A (en) * | 2013-06-27 | 2013-10-09 | 深圳市汇川技术股份有限公司 | Synchronous motor temperature rise test system and method |
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