CN107907829B - Motor testing system and method - Google Patents
Motor testing system and method Download PDFInfo
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- CN107907829B CN107907829B CN201711132371.5A CN201711132371A CN107907829B CN 107907829 B CN107907829 B CN 107907829B CN 201711132371 A CN201711132371 A CN 201711132371A CN 107907829 B CN107907829 B CN 107907829B
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- 238000012360 testing method Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims description 8
- 238000001816 cooling Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
-
- 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
- G01R31/343—Testing dynamo-electric machines in operation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Manufacture Of Motors, Generators (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The invention provides a motor testing system and a motor testing method. The motor testing system comprises a clamp for clamping a motor stator to be tested, a dynamometer for testing the power of the motor to be tested and a connecting shaft connected with an extending shaft of the dynamometer; the motor test system further comprises a bearing, wherein the bearing comprises a main shaft connected with the connecting shaft and a shaft sleeve sleeved outside the main shaft; the spindle sleeve is fixedly arranged with the clamp, and the spindle is suspended in the spindle sleeve. According to the motor testing system and the motor testing method, the main shaft connected with the rotor of the motor to be tested is suspended in the shaft sleeve, so that the main shaft is prevented from being in direct contact with the inner wall of the shaft sleeve when rotating, the mechanical friction loss of the motor testing system is reduced, and the stability and consistency of the motor during testing are improved.
Description
Technical Field
The invention belongs to the technical field of motor testing, and particularly relates to a motor testing system and method.
Background
In the development process of the refrigerator compressor, the energy-saving effect of the compressor is determined by a large part of motor efficiency; in addition, the compressor product pursues high cost performance, and the motor is required to reasonably meet the power requirement of the load of the compressor pump body. In both cases, the technician needs to evaluate the output power, the rotation speed, the current and the efficiency through the motor performance test bench to determine the advantages and disadvantages of the design scheme.
At present, more motor performance testing devices are provided, as shown in fig. 1, the motor performance testing device comprises a stabilized variable frequency power supply 1', a test bench 2', a dynamometer 3', a tested motor clamp 4', a dynamometer controller 5', a power analyzer 6', and a computer 7' provided with data acquisition and processing software. The apparatus shown in fig. 1 is suitable for testing an industry standard motor with its housing end cap, and fig. 2 is a motor power flow diagram following its testing principle, wherein fig. 2 shows: p 1 -motor input power, P Cu1 -stator copper loss, P Fe -stator iron loss, P M -electromagnetic power, P Cu2 -rotor copper loss, P Ω -total mechanical power, P Ω -mechanical loss, P h -additional loss, P 2 -motor output power.
The motor performance test device shown in fig. 1 simulates a mechanical load by controlling the torque output by the dynamometer 3 'through the dynamometer controller 5'. The instantaneous speed n and the input power P 1 of the motor to be tested are collected from time to time, and the efficiency value eta of the motor to be tested under the load torque is calculated by the background of the following formula:
P2＝T·n/60*2π
η＝P2/P1
However, with the above-described apparatus, problems of mounting and testing accuracy of the motor under test are faced with respect to the motor-type shell-less motor of the refrigeration compressor.
Patent ZL200520064759.2 discloses a compressor motor test fixture, can solve like air conditioner and refrigerator compressor motor, has the problem of test difficulty because of not having shell and end cover, and the biggest characteristic of this fixture is adaptable compressor motor overall dimension in a certain limit, and the universalization is better. In the structure, a bearing seat mechanism is arranged between a supporting sleeve and a main shaft, rolling friction loss is arranged on ball bearings at two ends, and the absolute value of the rolling friction loss is smaller, but the rolling friction loss is larger than the absolute value of the rolling friction loss in the micro-special motor loss such as a refrigerator compressor, so that the precision of testing is influenced, and the rolling friction loss is intuitively expressed at more than 3 points of the fluctuation of the twice testing efficiency of the same motor.
Patent ZL200920311716.8 discloses a shell-less motor testing device, a testing platform is provided with a dynamometer and a bearing seat, a general motor main shaft is arranged in a bearing in the bearing seat, one end of the main shaft is connected with a testing shaft of the dynamometer, the other end of the main shaft is provided with a special fixture for installing a rotor, and a removable stator is sleeved outside the rotor. The device is easy to operate when testing the motor, and the testing accuracy of the shell-free motor is greatly improved. However, due to the existence of the bearing seat and the bearing, mechanical friction loss still exists, and stability and consistency of motor test data are affected.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a motor test system and a motor test method, so as to solve the technical problem that the stability and consistency of the shell-less motor are not high when the shell-less motor is tested on the motor test system.
In order to solve the problems, the invention provides a motor testing system, which comprises a clamp for clamping a motor stator to be tested, a dynamometer for testing the power of the motor to be tested and a connecting shaft connected with an extending shaft of the dynamometer; the motor test system further comprises a bearing, wherein the bearing comprises a main shaft connected with the connecting shaft and a shaft sleeve sleeved outside the main shaft; the spindle sleeve is fixedly arranged with the clamp, and the spindle is suspended in the spindle sleeve.
Preferably, the bearing is an air bearing.
Preferably, the motor test system further comprises a gas source for providing a gas to the bearing, the gas source being in communication with the bearing.
Preferably, the motor test system further comprises a pressure regulator disposed on the air passage between the air source and the bearing.
Preferably, the motor test system further comprises a control switch disposed on the air passage between the air source and the bearing.
Preferably, the motor test system further comprises a dry filter for drying the air source, the dry filter being disposed on the air passage between the air source and the bearing.
Preferably, the motor test system further comprises a power analyzer connected with the dynamometer.
Preferably, the dynamometer comprises a dynamometer host and a dynamometer controller for controlling the dynamometer host.
Preferably, the dynamometer further comprises a dynamometer cooling device for cooling the dynamometer host, and the dynamometer cooling device is arranged on the dynamometer host.
Preferably, the bearing is a magnetic suspension bearing.
Preferably, the motor test system comprises a magnetic bearing controller for controlling the magnetic bearing and a position sensor for monitoring the magnetic bearing.
The invention also provides a motor testing method, which is applied to the motor testing system and comprises the following steps: testing whether a main shaft of a bearing of the motor testing system is in contact with a shaft sleeve or not; connecting a rotor of a motor to be tested to the main shaft, and fixing a stator of the motor to be tested to a clamp of the motor testing system; opening a dynamometer; setting test parameters; and starting the motor to be tested.
Preferably, the step of setting the test parameters includes: p Ω = 0, where p Ω is the mechanical friction loss.
According to the motor testing system and method, the main shaft connected with the rotor of the motor to be tested is suspended in the shaft sleeve, so that the main shaft is prevented from being in direct contact with the inner wall of the shaft sleeve when rotating, the mechanical friction loss of the motor testing system is reduced, and the stability and consistency of the motor during testing are improved.
Drawings
FIG. 1 is a schematic diagram of a prior art motor test system;
FIG. 2 is a motor energy flow diagram of the motor test system shown in FIG. 1;
FIG. 3 is a schematic diagram of a motor testing system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the mating structure of the fixture and the bearing according to the embodiment of the present invention;
FIG. 5 is a left side view of FIG. 4;
fig. 6 is a flow chart of a motor testing method according to an embodiment of the present invention.
The reference numerals are expressed as:
1', a stabilized variable frequency power supply; 2', a test bench; 3', a dynamometer; 4', a tested motor clamp; 5', a dynamometer controller; 6', a power analyzer; 7', a computer;
1. A clamp; 21. a dynamometer host; 22. a dynamometer controller; 23. a dynamometer cooling device; 3. a connecting shaft; 4. a bearing; 41. a main shaft; 42. a shaft sleeve; 5. a power supply; 6. a test bench; 7. a power analyzer; 8. a data acquisition and processor; 9. a gas source; 10. a voltage regulator; 11. a control switch; 12. and (5) drying the filter.
Detailed Description
The following embodiments of the present invention are merely for convenience of description of the structure, and do not limit the structure to be protected by the present invention.
Referring to fig. 3 to 5 in combination, according to an embodiment of the present invention, there is provided a motor testing system including a jig 1 for clamping a stator of a motor to be tested, a dynamometer for testing power of the motor to be tested, a connection shaft 3 connected to an extension shaft of the dynamometer, and a bearing 4, the bearing 4 including a main shaft 41 connected to the connection shaft 3, and a shaft sleeve 42 sleeved outside the main shaft 41; the shaft sleeve 42 is fixedly arranged with the fixture 1, and the main shaft 41 is suspended in the shaft sleeve 42. According to the invention, the main shaft 41 connected with the rotor of the motor to be tested is suspended in the shaft sleeve 42, so that the main shaft 41 is prevented from being in direct contact with the inner wall of the shaft sleeve 42 when rotating, the mechanical friction loss of a motor test system is reduced, and the stability and consistency of the motor test are improved.
Specifically, as shown in fig. 3, the motor test system of the present invention includes a power supply 5, and the entire motor test system is supplied with power through the power supply 5. In a preferred embodiment, the power supply 5 of the present invention is a variable frequency regulated power supply to meet the needs of a motor test system.
Referring to fig. 4 and 5 in combination, the clamp 1 of the motor testing system of the present invention is fixedly provided with the shaft sleeve 42 of the bearing 4, the connecting shaft 3 passes through the clamp 1 and is connected with the extension shaft of the dynamometer, and the connecting shaft 3 is suspended in the center of the clamp 1. The main shaft 41 is externally connected with the connecting shaft 3, and the main shaft 41 is suspended in the shaft sleeve 42, so that the manufacturing precision of the main shaft 41 can be higher than that of the connecting shaft 3, and the friction between the main shaft 41 and the shaft sleeve 42 can be reduced even if the main shaft 41 is contacted with the inner wall of the shaft sleeve 42 during rotation. In another embodiment, the motor testing system further comprises a testing stand 6, and the bearing 4, the fixture 1 and the dynamometer can all be placed on the testing stand 6.
The dynamometer of the invention comprises a dynamometer host 21 and a dynamometer controller 22 for controlling the work of the dynamometer host 21. The dynamometer controller 22 may be provided in the dynamometer host 21, or may be independent of the dynamometer host 21. In a preferred embodiment, the dynamometer further includes a dynamometer cooling device 23 for cooling the dynamometer host 21, and the dynamometer cooling device 23 may be directly disposed on the dynamometer host 21, so as to avoid the overheating of the dynamometer host 21, and influence the test result of the motor test system.
The motor test system of the present invention further comprises a power analyzer 7 connected to the dynamometer for measuring the power or other parameters of the dynamometer.
The motor test system of the present invention further comprises a data acquisition and processor 8, in one embodiment of the present invention, the data acquisition and processor 8 of the present invention may be a computer, on which data acquisition and processing software is loaded; in other embodiments, the data acquisition and processor 8 of the present invention may also be other electronic devices, such as a cell phone loaded with data acquisition and processing software. The data acquisition and processor 8 is connected with the dynamometer controller 22 and the power analyzer 7, and acquires relevant data of the dynamometer controller 22 and the power analyzer 7 so as to analyze the motor to be tested.
The above is a general description of the motor testing system of the present invention, and in a specific embodiment, the bearing 4 of the present invention may be an air bearing, i.e. a chamber of the shaft sleeve 42 is introduced with air under a certain pressure so that the main shaft 41 is suspended in the chamber of the shaft sleeve 42. Since the main shaft 41 of the air bearing is suspended in the cavity of the shaft sleeve 42 to rotate, the main shaft 41 can be ensured not to generate mechanical friction with the inner wall of the shaft sleeve 42 when rotating.
As shown in fig. 3, in order to supply air to the cavity of the shaft sleeve 42 of the air bearing, so that the main shaft 41 of the air bearing is not contacted with the inner wall of the shaft sleeve 42 in the whole motor test system, the invention also provides an air source 9, and the air source 9 is communicated with the bearing 4 through an air passage. In a preferred embodiment, the air source 9 of the present invention is a regulated air source 9, so as to provide the regulated air source 9 to the cavity of the shaft sleeve 42, and the air pressure is stable, so that the contact between the main shaft 41 and the inner wall of the shaft sleeve 42 can be effectively avoided.
In order to realize pressure regulation, a pressure regulator 10 can be arranged on the air passage between the air source 9 and the air bearing.
For better control of the air source 9, a control switch 11 can be arranged on the air passage between the air source 9 and the air bearing; in a specific embodiment, the control switch 11 may be a pressure relay.
In general, the bearing 4 is a precision device, and it is necessary to ensure the drying of the bearing 4 and reduce the corrosion of the bearing 4, so that the motor test system further includes a drying filter 12 for drying the air source 9, and the drying filter 12 is disposed on the air passage between the air source 9 and the air bearing, so that the air supplied into the shaft sleeve 42 of the air bearing is dry.
In another embodiment, the bearing 4 of the present invention is a magnetic suspension bearing, and the main shaft 41 is suspended in the shaft sleeve 42 by magnetic force, so that there is no mechanical contact between the main shaft 41 and the shaft sleeve 42. Preferably, the motor test system further comprises a magnetic bearing controller for controlling the magnetic bearing and a position sensor for monitoring the magnetic bearing, so that the position between the main shaft 41 and the shaft sleeve 42 of the magnetic bearing can be monitored and controlled in real time, the inner wall contact between the main shaft 41 and the shaft sleeve 42 is prevented, the mechanical friction loss of the motor test system is reduced, and the stability and consistency of the motor test are improved.
As shown in fig. 6, the invention further provides a motor testing method applied to the motor testing system, which comprises the following steps: testing whether the main shaft 41 of the bearing 4 of the motor testing system is in contact with the shaft sleeve 42; connecting a rotor of a motor to be tested to a main shaft 41, and fixing a stator of the motor to be tested to a clamp 1 of a motor test system; opening a dynamometer; setting test parameters; and starting the motor.
Specifically, step S1: it is tested whether the main shaft 41 of the bearing 4 is in contact with the sleeve 42.
Taking an air bearing as an example, before a motor to be tested is in a motor test system, the air bearing is statically debugged, a universal meter can be used for testing the steady-state resistance value between the main shaft 41 and the shaft sleeve 42, and the air floating effect and the gap between the main shaft 41 and the shaft sleeve 42 can be simply judged. If the resistance value tested by the universal meter is ≡, the air film is good, and the air bearing can work. If the resistance change is not constant or zero, indicating that the spindle 41 is in contact with the sleeve 42, the spindle 41 needs to be removed for cleaning or repair.
Step S2: the rotor of the motor to be tested is connected to the main shaft 41, and the stator of the motor to be tested is fixed on the fixture 1 of the motor testing system.
After the main shaft 41 of the test bearing 4 is not in contact with the shaft sleeve 42, the rotor of the motor to be tested is connected to the main shaft 41, and the stator of the motor to be tested is fixed to the fixture 1 of the motor test system.
After the motor to be tested is assembled, whether the main shaft 41 of the test bearing 4 is in contact with the shaft sleeve 42 can be further confirmed by the method, and the test result is debugged.
Step S3: and opening the dynamometer.
Step S4: and setting test parameters.
Where p Ω =0, where p Ω is the mechanical friction loss, the value of p Ω changes very little at each test, affected by the wear and assembly of the bearing 4 when the motor test system is in operation. It can be seen from fig. 2 of the prior art that the value of P Ω has a relatively large influence on the value of P 1, and P 1 is the input power of the motor. The value of P Ω is large, the value of P 1 is large, and the motor efficiency is low; the value of P Ω is small, the value of P 1 is small, and the motor efficiency is high. In this embodiment, the main shaft 41 of the bearing 4 is suspended in the shaft sleeve 42, so that the influence of friction and assembly of the bearing 4 on the test result of the motor can be basically ignored, therefore, if p Ω =0 is set, the interference of mechanical friction can be eliminated, and the stability and consistency of the motor test system can be improved.
And S5, starting the motor to be tested.
According to the motor testing method, the main shaft of the motor testing system is suspended in the shaft sleeve, so that the main shaft can be prevented from being in direct contact with the inner wall of the shaft sleeve when rotating, and the friction of the bearing and the influence of assembly on a motor testing result are eliminated; in the test process, p Ω =0 is set, so that the interference of mechanical friction can be eliminated, and the stability and consistency of a motor test system are improved.
The following describes a test method of a motor test system with an air bearing by taking the air bearing as an example:
Step S10: the air source 9 is connected, so that the air pressure of the air source 9 reaches 4 multiplied by 10 5 Pa;
in order to make the air bearing work better, it is necessary to ensure that the air supply 9 provides air pressure up to 4×10 5 Pa, if the air pressure does not reach 4×10 5 Pa, the air supply 9 can be pressurized or exchanged by the pressure regulator 10.
Step S20: testing whether the main shaft 41 of the air bearing is in contact with the shaft sleeve 42;
The air bearing is statically debugged, and the air bearing effect and the gap between the main shaft 41 and the shaft sleeve 42 can be judged by using a universal meter to test the steady-state resistance value between the main shaft 41 and the shaft sleeve 42. If the resistance value tested by the universal meter is ≡, the air film is good, and the air bearing can work. If the resistance change is not constant or zero, indicating that the spindle 41 is in contact with the sleeve 42, the spindle 41 needs to be removed for cleaning or repair.
Step S30, connecting a rotor of the motor to be tested to the main shaft 41, and fixing a stator of the motor to be tested to the fixture 1 of the motor testing system.
After the main shaft 41 of the test bearing 4 is not in contact with the shaft sleeve 42, the rotor of the motor to be tested is connected to the main shaft 41, and the stator of the motor to be tested is fixed to the fixture 1 of the motor test system.
After the motor to be tested is assembled, if necessary, it can be further confirmed whether the main shaft 41 of the test bearing 4 is in contact with the shaft sleeve 42, and debugging is performed with respect to the test result.
Step S40, starting the variable-frequency stabilized power supply 5, and selecting the power supply voltage and the frequency required by adjustment;
s50, opening a dynamometer and a power analyzer 7;
Step S60, opening a data acquisition and processor, setting configuration parameters and selecting a proper range;
Wherein p Ω＝0,pΩ in the configuration parameters is the mechanical friction loss, and other parameter settings can refer to the prior art.
Step S70, starting the operation of a motor to be tested, and adjusting the operation frequency of a driving controller of the motor to be tested;
step S80, adjusting and setting the loading torque of the dynamometer host;
and step S90, after stable operation for a certain time, storing and post-processing the data.
In summary, the main shaft connected with the rotor of the motor to be tested is suspended in the shaft sleeve, so that the main shaft is prevented from being in direct contact with the inner wall of the shaft sleeve when rotating, the mechanical friction loss of a motor test system is reduced, and the stability and consistency of the motor test are improved.
It will be readily appreciated by those skilled in the art that the above advantageous ways can be freely combined and superimposed without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (13)
1. The motor testing system comprises a clamp (1) for clamping a motor stator to be tested, a dynamometer for testing the power of the motor to be tested and a connecting shaft (3) connected with an extending shaft of the dynamometer; it is characterized in that the method comprises the steps of,
The motor test system further comprises a bearing (4), the bearing (4) comprises a main shaft (41) and a shaft sleeve (42), the main shaft (41) is connected with the connecting shaft (3), and the shaft sleeve (42) is sleeved outside the main shaft (41);
Wherein the shaft sleeve (42) is fixedly arranged with the clamp (1), and the main shaft (41) is suspended in the shaft sleeve (42); the manufacturing precision of the main shaft (41) is higher than that of the connecting shaft (3);
One end of the connecting shaft (3) passes through the clamp (1) and is connected with an extension shaft of the dynamometer, the other end of the connecting shaft (3) is connected with the main shaft (41), and the connecting shaft (3) is suspended at the center of the clamp (1);
the shaft sleeve (42), the clamp (1), the connecting shaft (3) and the dynamometer are sequentially arranged along the axial direction of the main shaft (41) and the connecting shaft (3).
2. Motor testing system according to claim 1, characterized in that the bearing (4) is an air bearing.
3. Motor testing system according to claim 2, characterized in that it further comprises a gas source (9) for providing gas to the bearing (4), the gas source (9) being in communication with the bearing (4).
4. A motor testing system according to claim 3, further comprising a pressure regulator (10), said pressure regulator (10) being arranged on the air duct between said air source (9) and said bearing (4).
5. A motor testing system according to claim 3, characterized in that the motor testing system further comprises a control switch (11), the control switch (11) being arranged on the air duct between the air source (9) and the bearing (4).
6. A motor testing system according to claim 3, characterized in that the motor testing system further comprises a drying filter (12) for drying the air supply (9), the drying filter (12) being arranged on the air duct between the air supply (9) and the bearing (4).
7. A motor testing system according to claim 3, characterized in that the motor testing system further comprises a power analyzer (7) connected to the dynamometer.
8. Motor testing system according to claim 1, characterized in that the dynamometer comprises a dynamometer host (21) and a dynamometer controller (22) for controlling the dynamometer host (21).
9. The motor testing system according to claim 8, wherein the dynamometer further comprises a dynamometer cooling device (23) for cooling the dynamometer host (21), the dynamometer cooling device (23) being provided on the dynamometer host (21).
10. Motor testing system according to claim 1, characterized in that the bearing (4) is a magnetic bearing.
11. The motor testing system of claim 10, comprising a magnetic bearing controller for controlling the magnetic bearing and a position sensor for monitoring the magnetic bearing.
12. A motor testing method applied to the motor testing system of any one of claims 1 to 11, comprising:
testing whether a main shaft (41) of a bearing (4) of the motor testing system is in contact with a shaft sleeve (42);
Connecting a rotor of a motor to be tested to the main shaft (41), and fixing a stator of the motor to be tested to a clamp (1) of the motor test system;
Opening a dynamometer;
Setting test parameters;
and starting the motor to be tested.
13. The motor testing method of claim 12, wherein the step of setting the test parameters comprises: p Ω = 0, where p Ω is the mechanical friction loss.
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| CN201711132371.5A CN107907829B (en) | 2017-11-15 | 2017-11-15 | Motor testing system and method |
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| CN201711132371.5A CN107907829B (en) | 2017-11-15 | 2017-11-15 | Motor testing system and method |
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| CN107907829B true CN107907829B (en) | 2024-07-02 |
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| CN86106766A (en) * | 1986-09-27 | 1988-04-27 | 长沙市新湘机械厂 | Highly precise micropower testing instrument |
| CN2391187Y (en) * | 1999-08-11 | 2000-08-09 | 机械工业部广州电器科学研究所 | Installating clamp for compressor motor measurement |
| CN201654192U (en) * | 2009-09-28 | 2010-11-24 | 四川丹甫制冷压缩机股份有限公司 | Test device for shell-less motor |
| CN102374234A (en) * | 2010-08-26 | 2012-03-14 | 张方荣 | Ceramic bearing |
| CN105090040A (en) * | 2015-09-25 | 2015-11-25 | 珠海凌达压缩机有限公司 | Pump body structure and compressor with same |
| CN207571274U (en) * | 2017-11-15 | 2018-07-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor Measuring System |
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| CN107907829A (en) | 2018-04-13 |
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