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The accurate extraction and analysis of slot harmonics caused by slotting in an induction motor are important for the motor's performance evaluation and state monitoring. However, the frequency distribution of rotor slot harmonics (RSHs) varies along with the operating states of the motor, such as motor speed and slip ratio, and the voltage and current signals of the motor only contain small-amplitude RSHs compared with other harmonics; both make it difficult to extract and analyze the RSHsdoi:10.3390/en15186643 fatcat:exmeu5f2yjfvzmtufivqla2ep4