CN117310481A - High-temperature endurance test device and test method for motor stator assembly - Google Patents
High-temperature endurance test device and test method for motor stator assembly Download PDFInfo
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- CN117310481A CN117310481A CN202311097463.XA CN202311097463A CN117310481A CN 117310481 A CN117310481 A CN 117310481A CN 202311097463 A CN202311097463 A CN 202311097463A CN 117310481 A CN117310481 A CN 117310481A
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- 238000012360 testing method Methods 0.000 title claims abstract description 90
- 238000010998 test method Methods 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 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
- 238000012806 monitoring device Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention provides a high-temperature endurance test device and a test method for a motor stator assembly, wherein the high-temperature endurance test device for the motor stator assembly comprises the following components: the power supply module is used for providing frequency-adjustable current for the stator assembly so as to control the temperature of the stator assembly during operation; the data acquisition and control module is used for acquiring temperature data of the stator assembly during working, analyzing the temperature data, and transmitting the analysis data to the power supply module so that the power supply module can adjust the output current according to the analysis data; and the limit value monitoring alarm module is used for monitoring the measurement analog quantity of the stator assembly during working and feeding back the measurement analog quantity to the power supply module when the measurement analog quantity exceeds a safety threshold value so that the power supply module can execute shutdown operation according to the feedback. The test device solves the problem of high-temperature working endurance test of the single stator assembly, and can efficiently and quickly verify the high-temperature working fatigue endurance capability of the insulating system of the stator assembly.
Description
Technical Field
The invention relates to the technical field of motor stators, in particular to a high-temperature endurance test device and a test method for a motor stator assembly.
Background
Because the motor stator can be in a high-temperature state for a long time under the whole vehicle working condition, the requirement on the durability and the reliability of the motor stator insulation system is higher, and the durability and the reliability of the stator assembly insulation system need to be fully verified during the early development of the stator assembly.
At present, there is no high temperature operation endurance test method and apparatus for a single stator assembly, but only for the entire motor assembly. If the stator assembly high-temperature operation endurance test is carried into the motor assembly, the following two disadvantages exist: 1) The test cost and the test period are increased because the B2B rack is needed to be used if the motor assembly is subjected to high-temperature work for durability, and the motor controller is connected to the B2B rack, so that the test cost and the test period are increased; 2) If other variables are introduced in the high-temperature working endurance test carried in the motor assembly, the insulation system capacity of the stator assembly cannot be accurately verified. Because of the rotor, stator, bearings, rotational changes, cooling systems, etc., involved in the motor assembly, these components can affect the results of the test itself and, if it fails, it is difficult to accurately locate the root cause of the problem.
Therefore, in order to fully verify the durability and reliability of the insulating system of the stator assembly, the invention provides a high-temperature durability test device and a high-temperature durability test method for the stator assembly of the motor.
Disclosure of Invention
Based on the expression, the invention provides a high-temperature endurance test device and a high-temperature endurance test method for a motor stator assembly, which solve the technical problem that the endurance reliability of the stator assembly cannot be fully verified in the prior art.
The technical scheme for solving the technical problems is as follows:
in a first aspect, the present invention provides a high temperature endurance test apparatus for a motor stator assembly, comprising:
the power supply module is used for providing frequency-adjustable current for the stator assembly so as to control the temperature of the stator assembly during operation;
the data acquisition and control module is used for acquiring temperature data of the stator assembly during working, analyzing the temperature data, and transmitting the analysis data to the power supply module so that the power supply module can adjust the output current according to the analysis data;
and the limit value monitoring alarm module is used for monitoring the measurement analog quantity of the stator assembly during working and feeding back the measurement analog quantity to the power supply module when the measurement analog quantity exceeds a safety threshold value so that the power supply module can execute shutdown operation according to the feedback.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the power supply module comprises an AC variable-frequency power supply and a current transformer;
the AC variable frequency power supply is used for providing current with specific frequency for the stator assembly;
the current transformer is used for monitoring the current output by the AC variable-frequency power supply.
Further, the data acquisition and control module comprises an industrial personal computer and a temperature collector;
the temperature collector is used for collecting the temperature of the stator assembly during working;
the industrial personal computer is electrically connected with the temperature collector and used for controlling the temperature collector.
Further, the working environment of the stator assembly is to put the stator assembly in air or submerge the stator assembly in cooling engine oil.
Further, when the working environment of the stator assembly is that the stator assembly is placed in the air, the environment temperature is controlled to be 18-28 ℃;
when the working environment of the stator assembly is that the stator assembly is immersed in cooling oil, the oil temperature cannot exceed 130 ℃, and the cooling oil is replaced every 336 hours.
Further, the measured analog quantity includes an oil temperature, an oil level height, an output current and voltage of the power supply module, an ambient temperature and humidity, and a maximum temperature of the stator assembly.
Further, the high-temperature endurance test device of the motor stator assembly further comprises an air pumping and exhausting module and an environment temperature control module;
the air pumping and exhausting and environment temperature control module is used for pumping and exhausting smell and heat emitted by the test station so as to control the temperature and humidity of the test environment.
In a second aspect, the present invention also provides a high temperature endurance test method for a motor stator assembly, which is operated by using the high temperature endurance test apparatus for a motor stator assembly according to the first aspect, comprising the steps of:
the power supply module outputs current to the motor stator to enable the motor stator to continuously work so as to reach a preset temperature;
the data acquisition and control module acquires temperature data of the stator assembly during working, analyzes the temperature data, and transmits the analysis data to the power supply module, so that the power supply module adjusts the output current according to the analysis data;
the limit value monitoring alarm module monitors the measurement analog quantity of the stator assembly during working and judges whether the measurement analog quantity exceeds a safety threshold value; if yes, notifying the power supply module to stop working;
if not, the power supply module continues to work until the preset test time is reached.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the power supply module outputs current according to a preset working condition so as to simulate the working condition of the actual motor in working.
Further, the method further comprises the following steps:
in the test process, the air exhausting module and the environment temperature control module exhaust odor and heat emitted by the test station, so that the temperature and the humidity of the test environment are controlled within the test standard requirement range.
Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:
according to the high-temperature endurance test device for the motor stator assembly, provided by the invention, the temperature of the winding of the stator assembly is maintained within a specified temperature range through the output current of the power supply module, and the data acquisition module, the stator test module and the alarm prompt module are further provided, so that the data monitoring and emergency alarm shutdown are realized to ensure the normal and stable operation of the test.
Compared with the prior art, the high-temperature endurance test device for the motor stator assembly solves the problem of high-temperature work endurance test of a single stator assembly, and can efficiently and quickly verify the high-temperature work fatigue endurance capability of an insulation system of the stator assembly. Compared with the prior art that the B2B opposite-dragging bench is used for verifying the high-temperature working durability of the motor stator assembly insulation system, the test time and the test cost are saved, meanwhile, the influence factors of other test variables such as a rotor, a rotary transformer, a controller and a cooling system are eliminated, and the test device can provide an efficient and accurate test verification solution for research and development of the motor stator assembly.
Further, since the high-temperature endurance test method of the motor stator assembly is implemented by adopting the high-temperature endurance test device of the motor stator assembly, all the beneficial effects of the high-temperature endurance test device of the motor stator assembly are possessed by the corresponding method, and the corresponding method is not repeated here.
Drawings
FIG. 1 is a schematic structural diagram of a high-temperature endurance test device for a motor stator assembly according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the overall layout of the related equipment of the high-temperature endurance test apparatus for a motor stator assembly in a laboratory according to an embodiment of the present invention;
FIG. 3 is a second schematic diagram of the overall layout of the related equipment of the high-temperature endurance test apparatus for the motor stator assembly in a laboratory according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of the overall structure of a test station of a high-temperature endurance test apparatus for a motor stator assembly according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a part of a test station of a high-temperature endurance test apparatus for a motor stator assembly according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an electrical signal control portion of a high temperature endurance test apparatus for a motor stator assembly according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an electrical signal acquisition portion of a high temperature endurance test apparatus for a motor stator assembly according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a high-temperature endurance test method for a motor stator assembly according to an embodiment of the invention.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
Embodiments of the present invention will be described in further detail with reference to fig. 1 to 8 and examples, which are provided to illustrate the present invention but not to limit the scope of the present invention.
In a first aspect, as shown in fig. 1, a high-temperature endurance test apparatus for a motor stator assembly according to an embodiment of the present invention includes:
and the power supply module is used for supplying frequency-adjustable current to the stator assembly so as to control the temperature of the stator assembly during operation.
The power supply module comprises an AC variable-frequency power supply and a current transformer; the AC variable frequency power supply is used for providing current with specific frequency for the stator assembly; the current transformer is used for monitoring the current output by the AC variable-frequency power supply.
The working environment of the stator assembly is that the stator assembly is placed in air or immersed in cooling engine oil.
When the working environment of the stator assembly is that the stator assembly is placed in the air, the ambient temperature is controlled at 18-28 ℃.
When the working environment of the stator assembly is that the stator assembly is immersed in the cooling oil, the oil temperature cannot exceed 130 ℃, and the cooling oil is replaced every 336 hours.
And the data acquisition and control module is used for acquiring temperature data of the stator assembly during working, analyzing the temperature data and transmitting the analysis data to the power supply module so that the power supply module can adjust the output current according to the analysis data.
Specifically, the data acquisition and control module comprises an industrial personal computer and a temperature acquisition device.
The temperature collector is used for collecting the temperature of the stator assembly during operation.
The industrial personal computer is electrically connected with the temperature collector and used for controlling the temperature collector.
And the limit value monitoring alarm module is used for monitoring the measurement analog quantity of the stator assembly during working and feeding back the measurement analog quantity to the power supply module when the measurement analog quantity exceeds a safety threshold value so that the power supply module can execute shutdown operation according to the feedback.
The measurement analog quantity comprises oil temperature, oil level height, output current and voltage of a power supply module, ambient temperature and humidity and highest temperature of the stator assembly. .
Further, the device also comprises an air exhaust and environment temperature control module; the air pumping and exhausting and environmental temperature control module is used for pumping and exhausting smell and heat emitted by the test station so as to control the temperature and humidity of the test environment.
The air pumping and exhausting and environmental temperature control module comprises an air pumping and exhausting pipeline and an adjustable fan; the adjustable fan is connected with the exhaust pipeline, the adjustable fan is a high-power adjustable fan, and the odor and heat exhaust is realized through the high-power adjustable fan and the pipeline.
In the device, the actual running temperature is determined by combining the motor continuous performance temperature requirement, the limit temperature setting requirement and the motor insulation material grade, and the running specified time (such as 2000 hours, 1800 hours, 1600 hours and …) and the actual running time are calculated by a high-temperature durability model according to the running temperature.
In actual operation, the following description will be given by way of specific examples, and as shown in fig. 2 and 3, the entire test apparatus is composed of the following main components: 2 power cabinets, 8 three-phase AC power, 2 test stations, 2 low voltage signal acquisition and control cabinets.
As illustrated in fig. 4 and 5 for the overall and partial structure of each test station. As can be seen from fig. 4, each test station is made up of 4 test barrels during which the stator assembly needs to be mounted to a fixture within the test barrel, i.e. each station can run a 4 stator assembly high temperature operation endurance test. Fig. 5 shows a partial structure of each test barrel, and it can be seen that each test barrel has an independent cooling oil circuit circulation, is provided with a radiator and a valve for discharging and replacing oil, and is also provided with 2 liquid level monitoring devices (a mechanical device and an electronic device).
Fig. 6 and 7 are schematic diagrams of the electrical signal control portion of the test apparatus. The whole control logic is closed-loop control, and the control logic is as follows: the temperature of the stator assembly is maintained at a set temperature (such as 150 ℃,180 ℃ …, specific temperature is set according to test requirements, and the specific temperature is not limited herein) by controlling an AC power supply to output three-phase current to heat the stator assembly, then collecting the temperature of the stator assembly winding through a temperature collecting module, and then controlling the temperature of the stator assembly through PID (proportion integration differentiation) by adjusting the output current, wherein physical quantities such as oil temperature, oil level height, output current, voltage, ambient temperature, humidity and the like need to be monitored in the process, and an execution program for limiting monitoring alarm and shutdown is provided.
In addition, in the operation of the machine, the machine is divided into three parts, wherein the first part is a self-checking part of the equipment, and mainly performs self-checking on main equipment components before running a test program, so that the state of the equipment before running the test is ensured to be free of problems; the second part is a main interface for running the test program, all the running operations of the program are performed on the interface, and the main interface comprises a program start-stop state, a station running condition and a station running state, and main control signals and monitoring signals are displayed; the third part is a sub-interface, which mainly displays all temperature data of the stator assembly windings in each test barrel in detail, and all relevant control and monitoring data.
In a second aspect, as shown in fig. 8, a high-temperature endurance test method for a motor stator assembly according to an embodiment of the present invention, which adopts a high-temperature endurance test apparatus for a motor stator assembly as in the first aspect, includes the following steps:
and S1, the power supply module outputs current to the motor stator, so that the motor stator continuously works to reach a preset temperature.
Specifically, the power supply module outputs current according to a preset working condition to simulate the working condition of the actual motor during working.
And S2, the data acquisition and control module acquires temperature data of the stator assembly during working, analyzes the temperature data, and transmits the analysis data to the power supply module, so that the power supply module adjusts the output current according to the analysis data. The method comprises the steps of carrying out a first treatment on the surface of the
S3, a limit value monitoring alarm module monitors a measurement analog quantity of the stator assembly during working and judges whether the measurement analog quantity exceeds a safety threshold value;
if yes, notifying the power supply module to stop working;
if not, the power supply module continues to work until the preset test time is reached.
In addition, in the test process, the odor and heat emitted by the test station can be pumped and exhausted through the pumping and environmental temperature control module.
In the test method, the temperature of the stator assembly winding is maintained in a specified temperature range by outputting current through the power supply module, and the test method is also provided with a limit monitoring and emergency alarm stopping device to ensure the normal and stable operation of the test.
In summary, the high-temperature endurance test device and the test method for the motor stator assembly provided by the embodiment of the invention solve the problem of high-temperature working endurance test of a single stator assembly, and can be used for efficiently and quickly verifying the high-temperature working fatigue endurance capability of an insulation system of the stator assembly. Compared with the prior art that the B2B opposite-dragging bench is used for verifying the high-temperature working durability of the motor stator assembly insulation system, the test time and the test cost are saved, meanwhile, the influence factors of other test variables such as a rotor, a rotary transformer, a controller and a cooling system are eliminated, and the test device can provide an efficient and accurate test verification solution for research and development of the motor stator assembly.
In the description of the present specification, the description with reference to the term "particular example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A high temperature endurance test apparatus for a motor stator assembly, comprising:
the power supply module is used for providing frequency-adjustable current for the stator assembly so as to control the temperature of the stator assembly during operation;
the data acquisition and control module is used for acquiring temperature data of the stator assembly during working, analyzing the temperature data, and transmitting the analysis data to the power supply module so that the power supply module can adjust the output current according to the analysis data;
and the limit value monitoring alarm module is used for monitoring the measurement analog quantity of the stator assembly during working and feeding back the measurement analog quantity to the power supply module when the measurement analog quantity exceeds a safety threshold value so that the power supply module can execute shutdown operation according to the feedback.
2. The motor stator assembly high temperature endurance test apparatus of claim 1, wherein the power supply module comprises an AC variable frequency power source and a current transformer;
the AC variable frequency power supply is used for providing current with specific frequency for the stator assembly;
the current transformer is used for monitoring the current output by the AC variable-frequency power supply.
3. The high-temperature endurance test device of the motor stator assembly according to claim 1, wherein the data acquisition and control module comprises an industrial personal computer and a temperature acquisition device;
the temperature collector is used for collecting the temperature of the stator assembly during working;
the industrial personal computer is electrically connected with the temperature collector and used for controlling the temperature collector.
4. A high temperature durability test apparatus for a motor stator assembly according to claim 3 wherein the operating environment of the stator assembly is to place the stator assembly in air or to submerge the stator assembly in cooling oil.
5. The apparatus according to claim 4, wherein when the working environment of the stator assembly is that the stator assembly is placed in air, the ambient temperature is controlled to be 18-28 ℃;
when the working environment of the stator assembly is that the stator assembly is immersed in cooling oil, the oil temperature cannot exceed 130 ℃, and the cooling oil is replaced every 336 hours.
6. The motor stator assembly high temperature endurance test apparatus of claim 1, wherein the measurement analog includes an oil temperature, an oil level height, an output current and voltage of the power supply module, an ambient temperature and humidity, and a maximum temperature of the stator assembly.
7. The high-temperature durability test device for a motor stator assembly according to claim 1, wherein the high-temperature durability test device for a motor stator assembly further comprises an air exhaust and environmental temperature control module;
the air pumping and exhausting and environment temperature control module is used for pumping and exhausting smell and heat emitted by the test station so as to control the temperature and humidity of the test environment.
8. A high temperature durability test method for a motor stator assembly, characterized in that a high temperature durability test apparatus for a motor stator assembly according to any one of claims 1 to 7 is employed, comprising the steps of:
the power supply module outputs current to the motor stator to enable the motor stator to continuously work so as to reach a preset temperature;
the data acquisition and control module acquires temperature data of the stator assembly during working, analyzes the temperature data, and transmits the analysis data to the power supply module, so that the power supply module adjusts the output current according to the analysis data;
the limit value monitoring alarm module monitors the measurement analog quantity of the stator assembly during working and judges whether the measurement analog quantity exceeds a safety threshold value; the method comprises the steps of carrying out a first treatment on the surface of the
If yes, notifying the power supply module to stop working;
if not, the power supply module continues to work until the preset test time is reached.
9. The method of claim 8, wherein the power module outputs current according to a predetermined condition to simulate a condition when the actual motor is operating.
10. The method of claim 8, further comprising:
in the test process, the air exhausting module and the environment temperature control module exhaust odor and heat emitted by the test station, so that the temperature and the humidity of the test environment are controlled within the test standard requirement range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311097463.XA CN117310481A (en) | 2023-08-27 | 2023-08-27 | High-temperature endurance test device and test method for motor stator assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311097463.XA CN117310481A (en) | 2023-08-27 | 2023-08-27 | High-temperature endurance test device and test method for motor stator assembly |
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| Publication Number | Publication Date |
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| CN117310481A true CN117310481A (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311097463.XA Pending CN117310481A (en) | 2023-08-27 | 2023-08-27 | High-temperature endurance test device and test method for motor stator assembly |
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| CN (1) | CN117310481A (en) |
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- 2023-08-27 CN CN202311097463.XA patent/CN117310481A/en active Pending
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