Inverter maintenance detection commonly used method

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In converter maintenance process, often encounter three phase induction motor all sorts of problems, such as peripheral circuit, parameter setting bad or mechanical failure. If is the inverter failure, which is part of www.dongfeng-motor.com the problem, how to judge slightly is introduced here. A, static testing: 1, testing rectifier circuit. Find converter internal dc power supply ac synchronous generator side and N and P, dispatch multimeter to resistance X10, red table bar got P, black table rods respectively in auto spare parts accordance with to R, S, T, there should be about a few of the resistance, and the basic balance. Instead received a black watch rod P side, squirrel cage single phase motor induction motor red table rods in turn received R, S, T, there is a close to the infinite value. Received a red table rod N side, repeat the above steps, alternator generator should get the same results. We can determine if you have the following as A result, the circuit is abnormal, a. resistance unbalanced three-phase, failure can explain rectifier bridge. B. red table welding P side bar, the resistance is infinite, can be concluded that rectifier bridge failure or malfunctioning of the starting resistance. 2, test the inverter circuit. Received a red table rod P side, black table rods respectively to meet U, V, W, there should be a dozens of the resistance, and resistance in basic same, reverse phase should be infinite. Received a black watch acmotor2.blogspot.com ac motor rod N side, repeat the above steps should get the same results, otherwise can determine fault inverter module