Load feedback measuring equipment of permanent magnet machine

Abstract

The invention provides load feedback measuring equipment of a permanent magnet machine. The load feedback measuring equipment of the permanent magnet machine is characterized by comprising a movable cabinet body, a rectifier cabinet is arranged inside the movable cabinet body, and an A phase connection terminal, a B phase connection terminal and a C phase connection terminal are respectively connected with an A phase alternating current input end, a B phase alternating current input end and a C phase alternating current input end of the rectifier cabinet through an electric current sensor. A direct-current output terminal A is connected with one direct-current output terminal of the rectifier cabinet through a switch, a voltmeter is connected with the switch in parallel, and a direct-current output terminal B is connected with another direct-current output terminal of the rectifier cabinet through a diverter. The load feedback measuring equipment of the permanent magnet machine overcomes the defect of the prior art, and combines three phase rectifier and the measuring equipment into a whole, can measure the parameters of the direct current and the alternating current, and meets the requirement of the load feedback test of a permanent magnet machine.

Description

technical field [0001] The invention relates to a measuring device for a load feedback test of a permanent magnet machine, which belongs to the technical field of motor test methods. Background technique [0002] The test of the permanent magnet machine in a large turbogenerator is a key link. The performance of the permanent magnet machine directly determines the voltage of the main exciter. Since the permanent magnet machine is composed of permanent magnet materials, the repeatability of the characteristics is poor, and each permanent magnet machine needs to be subjected to a load test. After the rotor magnetic field of the permanent magnet machine rotates with the shaft system, the three-phase winding on the stator is cut to generate three-phase high-frequency alternating current. The stator winding of the exciter, the rotor of the main exciter rotates with the shaft system, when the stator winding of the main exciter is excited, the rotor winding of the main exciter is ...

AI Technical Summary

Problems solved by technology

[0003] Although the device considers the safety factor and places the wiring copper bars in the cabinet, it is difficult to connect due to the limited space.

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