CN110542857A - new energy automobile motor and gear box performance comprehensive test device and test method - Google Patents
new energy automobile motor and gear box performance comprehensive test device and test method Download PDFInfo
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- CN110542857A CN110542857A CN201910864959.2A CN201910864959A CN110542857A CN 110542857 A CN110542857 A CN 110542857A CN 201910864959 A CN201910864959 A CN 201910864959A CN 110542857 A CN110542857 A CN 110542857A
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000010998 test method Methods 0.000 title claims abstract description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 7
- 230000005284 excitation Effects 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000011056 performance test Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/027—Test-benches with force-applying means, e.g. loading of drive shafts along several directions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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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
- G01R31/343—Testing dynamo-electric machines in operation
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Abstract
the invention relates to a new energy automobile motor and gear box performance comprehensive test device and a test method, which comprises a charger, an inverter, a motor drive frequency converter, a new energy automobile motor, a gear box and a generator which are sequentially connected and form a closed loop, wherein the input end of the charger is respectively connected with a municipal power supply and the generator, a lithium battery is connected in parallel between the charger and the inverter, the municipal power supply charges the lithium battery through the charger, direct currents output by the charger and the lithium battery supply power to the inverter together, and the inverter is used as a power supply to supply power to the motor drive frequency converter according to a set power frequency. An energy internal circulation mode is adopted, so that the electric energy is saved and the commercial power grid is not polluted; stepless speed regulation and stepless loading in the test process of the motor and the gear box of the new energy automobile can be realized.
Description
Technical Field
The invention relates to the technical field of new energy automobile detection, in particular to a new energy automobile motor and gear box performance comprehensive test device and a test method.
background
the performance test of each rotating speed point is required to be carried out on the new energy automobile motor and the gear box, the variable frequency motor is used for dragging the new energy automobile motor and the gear box, the gear box drives the generator to generate electricity, and the electric energy output by the generator is connected with loads such as resistors. The power of the resistor is mainly required to be adjusted to adjust the loading power of the whole system, and stepless speed regulation and stepless loading in the test process cannot be really realized. The electricity generated by the generator is consumed through the resistor, and energy is wasted; taking a 30KW electric motor of an electric automobile as an example, about 30 degrees of electricity is wasted in each hour during the test. In order to avoid energy waste, the prior art rectifies the electric energy of the generator and then inversely transforms the rectified electric energy into the power grid, and harmonic current is brought into the power grid by the inverter and the power of the generator needs to be adjusted in a test, so that the harmonic current is injected into the mains power grid while power fluctuation is caused to the mains power grid, and the electric energy quality of the mains power grid is reduced, so that a test device capable of solving the problems is needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a comprehensive performance test device and a comprehensive performance test method for a motor and a gearbox of a new energy automobile, which adopt an energy internal circulation mode and save electric energy without polluting a mains supply power grid; stepless speed regulation and stepless loading in the test process of the motor and the gear box of the new energy automobile can be realized.
In order to achieve the purpose, the invention adopts the technical scheme that:
a new energy automobile motor and gear box performance comprehensive test device comprises a charger, an inverter, a motor drive frequency converter, a new energy automobile motor, a gear box and a generator which are sequentially connected and form a closed loop, wherein the input end of the charger is respectively connected with a municipal power supply and the generator, a lithium battery is connected between the charger and the inverter in parallel, the municipal power supply charges the lithium battery through the charger, direct currents output by the charger and the lithium battery supply power to the inverter in the same direction, the inverter is used as a power supply to supply power to the motor drive frequency converter according to set power frequency, the output end of the new energy automobile motor is connected with a first tachometer and a first torque meter to detect the output rotating speed and the output torque of the new energy automobile motor, the output end of the gear box is connected with a second tachometer and a second torque meter to detect the output rotating speed and, and the generator is connected with an excitation system to adjust the output power of the generator.
Preferably, the input end of the charger is connected with the municipal power supply through a first switch, and the municipal power supply supplies power to the lithium battery through the charger under the condition that the first switch is closed.
in any of the above solutions, preferably, the motor-driven frequency converter is connected to the municipal power supply through a second switch, and the municipal power supply supplies power to the motor-driven frequency converter when the second switch is closed.
in any of the above schemes, preferably, the excitation system is an excitation regulator, and an excitation power switch is provided on the excitation regulator.
In any of the above aspects, preferably, a voltmeter and an ammeter are connected to a power supply line of the new energy vehicle motor, and are used for detecting the voltage and the current of the new energy vehicle motor.
In any of the above schemes, preferably, the lithium battery is internally provided with a BMS power management system, and the lithium battery is connected with an upper computer through a communication serial port to read the electric quantity information of the lithium battery.
The invention also provides a new energy automobile motor and gearbox performance comprehensive test method, which uses any one of the new energy automobile motor and gearbox performance comprehensive test device for detection and comprises the following steps,
S1, when the battery charger is used initially, the first switch is manually closed, the municipal power supply is switched on, the battery charger charges the lithium battery, the BMS power management system of the lithium battery automatically calculates the electric quantity of the battery according to the numerical values measured by the voltage sensor and the current sensor on the battery cell, and transmits an electric quantity signal to the upper computer through the communication interface, the upper computer is used for displaying electric quantity information, and after the lithium battery is full, the first switch is switched off, so that the battery charger is disconnected with the municipal power supply;
S2, starting the inverter, and supplying power to the inverter by the charger and the lithium battery, setting parameters of the new energy automobile motor to be driven after the motor driving frequency converter is powered on, and changing the rotating speed of the new energy automobile motor by adjusting the output parameters of the motor driving frequency converter;
S3, starting the new energy automobile motor, driving the gear box to drive the generator to rotate, changing the output power of the generator through the excitation regulator to enable the output power to reach the set output power, and indirectly changing the given torque of the new energy automobile motor;
S4, converting the alternating current generated by the generator into direct current through a charger, and connecting the direct current with the direct current output by the lithium battery in parallel to supply power to the inverter for sharing the output power of the lithium battery;
s5, reading values of the first torque meter and the first tachometer, obtaining output power of the new energy automobile motor, and obtaining performance parameters of the new energy automobile motor at different rotating speeds through calculation by combining voltage and current data measured by a voltage sensor and a current sensor;
And S6, reading the values of the second torque meter and the second tachometer, and combining the values detected in the step S5 to measure the transmission ratio and the transmission efficiency of the gearbox.
S7, when the electric quantity value of the lithium battery displayed on the upper computer is consumed to 30%, the inverter is turned off at the moment, the second switch is turned on to be connected with the municipal power supply, the municipal power supply is used for supplying power to the motor drive frequency converter, the test is continued, the electric energy generated by the generator in the test process is stored in the lithium battery through the charger, when the upper computer displays that the electric quantity of the lithium battery is full, the second switch is turned off to disconnect the municipal power supply and the motor drive frequency converter, the inverter is started to continue the test, and the steps S2-S6 are repeated to detect the corresponding performance parameters of the new energy motor and the performance parameters of the gear box at different rotating speeds.
compared with the prior art, the comprehensive performance test device and the comprehensive performance test method for the motor and the gear box of the new energy automobile have the following beneficial effects:
1. The internal circulation of energy is realized by forming a closed loop by the charger, the inverter, the motor drive frequency converter, the new energy automobile motor, the gear box and the generator, the electric quantity generated by the generator charges the lithium battery and the inverter through the charger, and the electric energy is not merged into the power grid under the condition of ensuring no waste and saving electric energy, so that the problem of harmonic pollution of the power grid caused by harmonic current entering the power grid is solved, the quality of the power grid is ensured, and the functions of saving energy and not polluting the power grid are realized;
2. The stepless speed regulation of the new energy automobile motor can be realized by connecting the motor driving frequency converter with the new energy automobile motor and regulating the output parameters of the motor driving frequency converter, the regulation range is wide, the excitation system is arranged on the generator, the gear box outputs torque and rotating speed to the generator, the generator generates power under the driving of the gear box, the power regulation is realized under the excitation control, the stepless loading function is realized, and the loading regulation range is wide.
drawings
FIG. 1 is a schematic overall structure diagram of a preferred embodiment of a comprehensive testing device and a testing method for the performance of a motor and a gearbox of a new energy automobile, provided by the invention;
Fig. 2 is a circuit block diagram of the charger and the lithium battery supplying power to the inverter in the embodiment shown in fig. 1.
The figures are labeled as follows: 1. a charger; 2. an inverter; 3. a lithium battery; 4. a generator; 5. a motor-driven frequency converter; 6. a new energy automobile motor; 7. a gear case; 8. a first tachometer; 9. a first torque meter; 10. a second tachometer; 11. a second torque meter; 12. an excitation regulator; 13. an excitation power switch; 14. a municipal power supply; 15. a first switch; 16. a second switch.
Detailed Description
In order that the invention may be further understood, the invention will now be described in detail with reference to specific examples.
As shown in fig. 1, an embodiment of the comprehensive performance testing device for the new energy automobile motor and the gearbox provided by the invention comprises a charger 1, an inverter 2, a motor-driven frequency converter 5, a new energy automobile motor 6, a gearbox 7 and a generator 4 which are sequentially connected and form a closed loop, wherein the generator 4 is connected with the charger 1, alternating current generated by the generator 4 is converted into direct current through the charger 1, the input end of the charger 1 is respectively connected with a municipal power supply 14 and the generator 4, a lithium battery 3 is connected in parallel between the charger 1 and the inverter 2, the municipal power supply 14 charges the lithium battery 3 through the charger 1, direct current output by the charger 1 and the lithium battery 3 jointly supplies power to the inverter 2, the inverter 2 is used as a power supply to supply power to the motor-driven frequency converter 5 according to a set power frequency, the output end of the new energy automobile motor 6 is connected with a first tachometer 8, the output speed and the output torque of the new energy automobile motor 6 are detected, the output end of the gear box 7 is connected with a second tachometer 10 and a second torque meter 11 to detect the output speed and the output torque of the gear box 7, and the generator 4 is connected with an excitation system to adjust the output power of the generator 4. The motor driving frequency converter 5 can be of the type Viagawa M500ET22G, and the inverter 2 can be of the type MD 880-50M-0094-4. The voltage of the municipal power supply 14 is 380V, the charger 1 and the lithium battery 3 supply power to the inverter 2, and the inverter 2 converts direct current into 380VAC 50Hz power frequency for output. The rotating speed of the new energy motor can be adjusted by adjusting the output parameters, such as the output frequency, of the motor driving frequency converter 5, so that stepless speed regulation is realized, and the adjusting range is wider.
The output power of the inverter 2 is not less than 35KVA, three-phase AC 380V +/-1%, 50 +/-0.2 Hz is output, an acceleration slope is fixed, and the operation is accelerated to 50Hz fixed operation when the starting operation is carried out. The voltage range of the lithium battery 3 is 540V-648V, and the nominal 1C current is 45A.
The charger 1 has two modes: the first mode is as follows: maximum power of 50KW when the municipal power supply 14 supplies power, mode two: when the generator 4 is used as a charging power source, the output voltage of the charger 1 can be set. The power range of the generator 4 is between 1KW and 50 KW.
the input end of the charger 1 is connected with the municipal power supply 14 through the first switch 15, and the municipal power supply 14 supplies power to the lithium battery 3 through the charger 1 under the condition that the first switch 15 is closed.
The motor-driven frequency converter 5 is connected with the municipal power supply 14 through a second switch 16, and the municipal power supply 14 supplies power to the motor-driven frequency converter 5 under the condition that the second switch 16 is closed.
the excitation system is an excitation regulator 12, an excitation power switch 13 is arranged on the excitation regulator 12, the gear box outputs torque and rotating speed to the generator, the generator generates power under the driving of the gear box, and power regulation is realized under the excitation control.
and a power supply line of the new energy automobile motor 6 is connected with a voltmeter and an ammeter for detecting the voltage and the current of the new energy automobile motor 6.
The built-in BMS power management system of lithium cell 3, lithium cell 3 passes through the communication serial ports and is connected with the host computer, reads lithium cell 3's electric quantity information.
The charger 1, the inverter 2, the motor driving frequency converter 5, the new energy automobile motor 6, the gear box 7 and the generator 4 designed in the embodiment are sequentially connected to form a closed loop, and an energy internal circulation mode is adopted, so that the electric energy is saved and the commercial power grid is not polluted; stepless speed regulation and stepless loading in the test process of the motor 6 and the gear box 7 of the new energy automobile can be realized.
The embodiment also comprises a comprehensive performance test method for the motor 6 and the gear box 7 of the new energy automobile, which is used for detecting by using any one of the comprehensive performance test devices for the motor 6 and the gear box 7 of the new energy automobile and comprises the following steps,
S1, when the battery charger is used initially, the first manual switch 15 is closed, the municipal power supply 14 is switched on, the battery charger 1 is enabled to charge the lithium battery 3, a BMS power management system of the lithium battery 3 automatically calculates the electric quantity of the battery according to the numerical values measured by a voltage sensor and a current sensor on a battery cell, and transmits an electric quantity signal to an upper computer through a communication interface, the upper computer is used for displaying electric quantity information, and after the lithium battery 3 is fully charged, the first switch 15 is switched off, so that the battery charger 1 is disconnected from the municipal power supply 14;
s2, starting the inverter 2, and supplying power to the inverter 2 by the charger 1 and the lithium battery 3, setting parameters of the new energy automobile motor 6 to be driven after the motor driving frequency converter 5 is powered on, and changing the rotating speed of the new energy automobile motor 6 by adjusting output parameters (such as output power) of the motor driving frequency converter 5;
s3, starting the new energy automobile motor 6, driving the gear box 7 to drive the generator 4 to rotate, changing the output power of the generator 4 through the excitation regulator 12 to enable the output power to reach the set output power, indirectly changing the given torque of the new energy automobile motor 6, wherein the change of the output power of the generator 4 is equivalent to the test of different given torques of the new energy automobile motor 6;
S4, the alternating current generated by the generator 4 is converted into direct current through the charger 1, and is connected with the direct current output by the lithium battery 3 in parallel to supply power for the inverter 2, so that the output power of the lithium battery 3 is shared, and the service life of the lithium battery 3 is prolonged.
S5, reading the values of the first torque meter 9 and the first tachometer 8, obtaining the output power of the new energy vehicle motor 6, and obtaining performance parameters of the new energy vehicle motor 6 at different rotational speeds, such as efficiency and torque, by calculation in combination with the voltage and current data measured by the voltage sensor and the current sensor;
s6, the values of the second torque meter 11 and the second tachometer 10 are read, and the gear ratio and the gear efficiency of the gear box 7 can be measured by combining the values detected in step S5.
S7, when the electric quantity value of the lithium battery 3 displayed on the upper computer is consumed to 30%, namely when an operator observes that the electric quantity is lower than or equal to 30% of the total electric quantity of the lithium battery 3 on the upper computer, the inverter 2 is closed at the moment, the second switch 16 is closed and connected with the municipal power supply 14, the municipal power supply 14 is used for supplying power to the motor-driven frequency converter 5, the test is continued, the electric energy generated by the generator 4 in the test process is stored in the lithium battery 3 through the charger 1, after the electric quantity of the lithium battery 3 displayed on the upper computer is full, the second switch 16 is disconnected, the municipal power supply 14 is disconnected with the motor-driven frequency converter 5, the inverter 2 is started to continue the test, and the steps S2-S6 are repeated to detect the corresponding performance parameters of the new energy motor and the performance parameters of the gear box 7 (the.
the working principle of the embodiment is as follows: when the device is used for the first time, the first switch 15 is closed, the municipal power supply 14 charges the lithium battery 3 through the charger 1, a BMS power management system arranged in the lithium battery 3 transmits a power signal to an upper computer for displaying a power value, when the power value displayed on the upper computer is full, the first switch 15 is disconnected, the lithium battery is disconnected from the municipal power supply 14, the inverter 2 is started, the charger 1 and the lithium battery 3 jointly supply power to the inverter 2, the inverter 2 is used as a power supply of the motor-driven frequency converter 5, the motor-driven frequency converter 5 is powered on, output parameters are adjusted, so that the output rotating speed of the new energy automobile motor 6 is adjusted, the first torque meter 9 tests the output torque, the first tachometer tests the output rotating speed, the new energy automobile motor 6 drives the gear box 7 to rotate, the second torque meter 11 tests the output torque of the gear box 7, and the second tachometer tests the output rotating speed of the gear, the gear box 7 drives the generator 4 to rotate, so that power is generated and is transmitted to the charger 1, and the charger 1 converts alternating current of the generator 4 into direct current for the inverter 2 to use.
It will be understood by those skilled in the art that the present invention includes any combination of the summary and detailed description of the invention described above and those illustrated in the accompanying drawings, which is not intended to be limited to the details and which, for the sake of brevity of this description, does not describe every aspect which may be formed by such combination. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a new energy automobile motor and gear box performance combined test device which characterized in that: comprises a charger, an inverter, a motor driving frequency converter, a new energy automobile motor, a gear box and a generator which are sequentially connected and form a closed loop, the input end of the charger is respectively connected with a municipal power supply and a generator, a lithium battery is connected between the charger and the inverter in parallel, the municipal power supply charges the lithium battery through the charger, direct currents output by the charger and the lithium battery supply power to the inverter together, the inverter is used as a power supply to supply power to the motor driving frequency converter according to set power frequency, the output end of the new energy automobile motor is connected with a first tachometer and a first torque meter, the output end of the gear box is connected with a second tachometer and a second torque meter, the generator is connected with an excitation system to adjust the output power of the generator.
2. the new energy automobile motor and gearbox performance comprehensive test device of claim 1, characterized in that: the input end of the charger is connected with the municipal power supply through the first switch, and the municipal power supply supplies power to the lithium battery through the charger under the condition that the first switch is closed.
3. The new energy automobile motor and gearbox performance comprehensive test device of claim 1, characterized in that: the motor drive converter is connected with the municipal power supply through the second switch, and the municipal power supply supplies power to the motor drive converter under the condition that the second switch is closed.
4. The new energy automobile motor and gearbox performance comprehensive test device of claim 1, characterized in that: the excitation system is an excitation regulator, and an excitation power switch is arranged on the excitation regulator.
5. The new energy automobile motor and gearbox performance comprehensive test device of claim 1, characterized in that: and the power supply line of the new energy automobile motor is connected with a voltmeter and an ammeter and is used for detecting the voltage and the current of the new energy automobile motor.
6. The new energy automobile motor and gearbox performance comprehensive test device of claim 1, characterized in that: the lithium battery is internally provided with the BMS power management system, and the lithium battery is connected with an upper computer through a communication serial port to read the electric quantity information of the lithium battery.
7. A new energy automobile motor and gear box performance comprehensive test method is characterized in that: the comprehensive testing device for the performance of the motor and the gearbox of the new energy automobile, which is used for testing, comprises the following steps,
S1, when the battery is used initially, the first switch is manually closed, the municipal power supply is switched on, the charger charges the lithium battery, the BMS power management system of the lithium battery automatically calculates the electric quantity of the battery according to the numerical values measured by the voltage sensor and the current sensor on the battery cell and transmits an electric quantity signal to the upper computer through the communication interface, the upper computer is used for displaying electric quantity information, and after the lithium battery is full, the first switch is switched off, so that the charger is disconnected with the municipal power supply;
S2, starting the inverter, and supplying power to the inverter by the charger and the lithium battery, setting parameters of the new energy automobile motor to be driven after the motor driving frequency converter is powered on, and changing the rotating speed of the new energy automobile motor by adjusting the output parameters of the motor driving frequency converter;
S3, starting the new energy automobile motor, driving the gear box to drive the generator to rotate, changing the output power of the generator through the excitation regulator to enable the output power to reach the set output power, and indirectly changing the given torque of the new energy automobile motor;
S4, converting the alternating current generated by the generator into direct current through a charger, and connecting the direct current with the direct current output by the lithium battery in parallel to supply power to the inverter for sharing the output power of the lithium battery;
S5, reading values of the first torque meter and the first tachometer, obtaining output power of the new energy automobile motor, and obtaining performance parameters of the new energy automobile motor at different rotating speeds through calculation by combining voltage and current data measured by a voltage sensor and a current sensor;
And S6, reading the values of the second torque meter and the second tachometer, and combining the values detected in the step S5 to measure the transmission ratio and the transmission efficiency of the gearbox.
S7, when the electric quantity value of the lithium battery displayed on the upper computer is consumed to 30%, the inverter is turned off at the moment, the second switch is turned on to be connected with the municipal power supply, the municipal power supply is used for supplying power to the motor drive frequency converter, the test is continued, the electric energy generated by the generator in the test process is stored in the lithium battery through the charger, when the upper computer displays that the electric quantity of the lithium battery is full, the second switch is turned off to disconnect the municipal power supply and the motor drive frequency converter, the inverter is started to continue the test, and the steps S2-S6 are repeated to detect the corresponding performance parameters of the new energy motor and the performance parameters of the gear box at different rotating speeds.
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| CN211318679U (en) * | 2019-09-09 | 2020-08-21 | 江苏广义牵引技术研究所有限公司 | New energy automobile motor and gear box performance comprehensive test device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202854301U (en) * | 2012-09-24 | 2013-04-03 | 广新海事重工股份有限公司 | Ship generator mooring test system |
| CN204405804U (en) * | 2015-01-14 | 2015-06-17 | 湖南东昌测控机电有限公司 | A kind of high efficiency motor performance test system |
| CN205080238U (en) * | 2015-10-21 | 2016-03-09 | 辽宁荣信电气传动技术有限责任公司 | High -voltage inverter realizes synchronous machine operating test platform topological structure |
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