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

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...

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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 of the core manufacturing process cannot be considered. The present invention provides a multi-phase multi-unit permanent magnet synchronous motor without mechanical load. Test Method for Motor Stator Core Loss

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