Abstract
While a squirrel-cage motor is working under a speed closed-loop control system, it may break down due to the fault of broken bars. In order to diagnose the fault on the condition of closed-loop systems, a co-simulation platform of closed-loop fault diagnosis system for squirrel-cage motors is established. It combines Simulink, Maxwell and Simplorer to build the co-simulation platform, which can demonstrate the slip frequency vector control system of squirrel-cage motors. The stator current data are acquired by the co-simulation platform, which generates respectively from a healthy cage motor model and a fault one with a broken bar. Based on stator current data, the fault characteristics are obtained by synchrosqueezing wavelet transforms (SWT) time-frequency analysis. Simulation results show that the co-simulation model of closed-loop fault diagnosis system can effectively diagnose the broken bar fault of squirrel-cage motors in the slip frequency vector control system.
Published Version
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