Testing method for iron core loss of alternating-current permanent magnet motors

A technique for permanent magnet motors and testing methods, which is applied to measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as the inability to consider the influence of the iron core manufacturing process, and difficulty in equipment adjustment, so as to avoid calculation of instrument parameters and Effects of adjustment, test cost savings, and simple structure

Active Publication Date: 2013-12-25
HARBIN INST OF TECH
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Problems solved by technology

[0003] In order to solve the problem that when using the iron loss tester to test the core loss of the permanent magnet synchronous motor, it is difficult to adjust the external test equipment and the influence

Method used

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  • Testing method for iron core loss of alternating-current permanent magnet motors
  • Testing method for iron core loss of alternating-current permanent magnet motors
  • Testing method for iron core loss of alternating-current permanent magnet motors

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Embodiment Construction

[0024] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but it is not limited to this. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention should be covered by the technical solution of the present invention. in the scope of protection.

[0025] Such as image 3 As shown, the test method of the multi-phase multi-unit permanent magnet synchronous motor stator core loss without mechanical load proposed by the present invention specifically comprises the following steps:

[0026] Step 1: The generator unit is connected to the load resistor or the load grid. When connected to the load grid, the control driver is turned off first.

[0027] Step 2: Connect the motor unit to the driver, and control the driver to start running. Test the motor speed, three-phase winding cur...

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Abstract

The invention relates to testing method for iron core loss of alternating-current permanent magnet motors, and belongs to the technical field of motor testing. According to the method, the winding structure characteristics of multiple units of the multi-phase multi-unit permanent magnet motors are used, one unit motor is made to run electromechanically, and one unit motor is made to run in an electricity generating mode, so that motor parameters of the multi units of motors in a loading state are obtained without an extra mechanical loading device. All the units are made to run electrically, and the current of a dq shaft is adjusted appropriately by controlling a driver to simulate the iron core loss in the motor loading state, so that the problems that an existing testing method and instrument for the iron core loss are difficult to adjust and can not take influence of a rolling technology on the iron core loss testing into consideration are solved. In the testing process of the mechanical characteristics of the multi-phase multi-unit motors by the adoption of the method, a motor shell and shaft extension of the motors do not need to be fixed specially, an external device is not needed, the motors have the advantages of being simple in structure and stable in property, the testing method has the advantages of being reliable in data and the like and can meet testing requirements for testing the iron core loss of the common permanent magnet synchronous motor.

Description

technical field [0001] The invention belongs to the technical field of motor testing, and relates to a method for testing core loss of an AC permanent magnet motor. Background technique [0002] At present, the test methods for the core loss of permanent magnet synchronous motors can be divided into two types: direct test method and indirect test method. The general direct test method is to use the prime mover and the tested motor to drag, and use the tests under different loads to calculate the core loss of the motor. The general indirect test method is to use external equipment to test the loss of electrical steel sheets of a single stator core, draw its loss curve, and then use the finite element method to calculate the speed and flux density waveforms of the motor under different operating conditions, so as to obtain this state The lower stator core loss. However, when using this method to test the stator core loss of a permanent magnet synchronous motor, a test device...

Claims

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Application Information

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IPC IPC(8): G01R27/26
Inventor 邹继斌曾德鹏徐永向王骞尚静刘承军赵猛江善林赵博胡建辉李勇
Owner HARBIN INST OF TECH
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