Testing method for mechanical characteristics of alternating-current permanent magnet motors

Abstract

The invention relates to a testing method for mechanical characteristics 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 synchronous motors are used when the mechanical characteristics of the motor is predicted, the mechanical characteristics of one unit motor can be predicted by testing related motor parameters under the operation condition that one unit motor operates electrically, and one unit motor operates in an electricity generating mode, and then the mechanical characteristics of the whole motor are obtained through the relation between one unit output torque and whole motor output torque, and therefore not only is the mechanical characteristics of the motor predicted, but also an extra loading device is omitted. 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 special fixture, an external device is not needed, the motors have the advantages of being simple in structure and stable in property, and the testing method has the advantages of being reliable in data and the like and can meet testing requirements for testing the mechanical characteristics 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 the mechanical characteristics of a multi-phase multi-unit permanent magnet synchronous motor. Background technique [0002] At present, the test methods for the mechanical characteristics of permanent magnet synchronous motors are relatively mature, most of which are direct test methods, that is, the motor is installed on the test bench, the motor itself runs electrically, and a dynamometer is added as a mechanical load at the same time, and then tested at different speeds. The output torque of the motor is used to complete the test of the mechanical characteristics of the motor. [0003] However, when using this method to test the mechanical characteristics of the permanent magnet motor, it is necessary to add a dynamometer or a mechanical load device, which virtually increases the equipment conditions required for the test. Moreover, the high-power low...

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Problems solved by technology

[0004] In order to solve the problem of needing additional equipment when using a dynamometer or a mechanical load to test the mechanical characteristics of a high-power permanent magnet synchronous motor, the present invention provides a method for predicting the mechanical characteristics of a multi-phase multi-unit permanent magnet synchronous motor without mechanical load

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