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Implementation of motor electromagnetic noise detection by mutual induction

A method of motor electromagnetic noise detection on the working state is put forward based on a mutual inductance. The motor current/voltage change and electromagnetic noise information can be detected by the method. The new method of motor electromagnetic noise detection is verified a feasibility and effectiveness through an actual test. A motor dynamic system diagnosis model can be established combining of the measured motor speed, its temperature, the current/voltage change and noise information with multi-source information fusion, and electrical status online intelligent fault detection and diagnosis achieved.