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Q : How to fix output phase loss on GD350-055G-4 driving an asynchronous motor?
A: GD350-055G-4，
Application: asynchronous motor ordinary speed regulation
Fault phenomenon: output phase loss reported after running for a period of time.
How to solve it?
Cause analysis:
Check that there are no abnormalities in the motor and the cables connecting the VFD to the motor. Measure the abnormality of the VFD main circuit. Disassemble and inspect the W-phase plastic shell for melting and discoloration of the copper bars. Continuing the inspection, it was found that one screw of the W-phase copper bar was loose.
Solution:
Replace with new components IGBT, copper bars, and chassis.
Improvement effect: Running normally.
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