A three-phase AC permanent magnet motor temperature rise test method

A permanent magnet motor, three-phase AC technology, applied in the field of three-phase AC permanent magnet motor temperature rise test, can solve problems such as motor energy consumption, achieve stable performance, reliable data, and save test costs.

Active Publication Date: 2018-05-22
HARBIN INST OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for testing the temperature rise of a three-phase AC permanent magnet motor, which is to solve the problem that when testing the temperature rise of a permanent magnet synchronous motor, additional testing equipment is required and the motor consumes energy for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0015] Specific implementation mode one: its method steps are:

[0016] Step 1: Read the nameplate information of the motor under test, and record the values ​​of power, current and speed when the motor is in rated operation;

[0017] Step 2: Perform current transformation on the current recorded in step 1 to obtain the phase current value of the three-phase winding of the motor, and then obtain the dq axis current I of the motor when the output power of the motor is the rated power through dq transformation d1 and I q1 ;

[0018] Step 3: Connect the motor to the driver, and control the driver to start running, adjust the input voltage of the motor winding, so that the speed of the motor is the value recorded in step 1;

[0019] Step 4: Adjust the drive controller to control the direct-axis voltage and quadrature-axis voltage applied to the winding at this time, so that the speed of the motor maintains the speed in step 3, and test the current of the three-phase winding at t...

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Abstract

The invention discloses a method for testing the temperature rise of a three-phase AC permanent magnet motor, which belongs to the technical field of motor testing. It is to solve the current problem that when testing the temperature rise of permanent magnet synchronous motors, external testing equipment is required and the motor consumes energy for a long time. Its method steps are: read the nameplate information of the motor under test, and record the values ​​of power, current and rotational speed when the motor is in rated operation; The speed of the motor is maintained at the speed in step 3, and the three-phase winding current at this time is tested, and the dq axis current Iq2 and Id2 at this time are obtained through dq transformation, and the temperature rise of the motor at this time is measured to obtain the temperature rise curve of the motor . The invention has the advantages of adjusting the dq-axis current by controlling the driver, so that the motor is in a no-load state, and in this state, the temperature rise under the load state of the motor is simulated. This method does not require an external mechanical load device, and will not cause energy consumption caused by mechanical loads during the test.

Description

technical field [0001] The invention relates to a method for testing the temperature rise of a three-phase AC permanent magnet motor, belonging to the technical field of motor testing. Background technique [0002] At present, there are mainly three methods for testing the temperature rise of permanent magnet synchronous motors: thermometer method, resistance method and temperature detector method. The thermometer method generally tests the surface temperature of the motor, the resistance method tests the average temperature of the winding, and the thermometer method tests the internal temperature of the motor by embedding a temperature measuring element inside the motor. [0003] However, these three temperature rise test methods all need to make the motor work under load for a long time, so that the temperature rise of the motor reaches a stable state to complete the temperature rise test. This requires that the motor needs to be connected to an external load device durin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34
Inventor 邹继斌曾德鹏徐永向
Owner HARBIN INST OF TECH
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