Effect of Harmonic on Electric Parameter Calculation of Double Squirrel-cage Asynchronous Motor Circuits

The paper analyses effect of harmonic on the electromagnetic parameters when the multiloop circuit method is used to study the internal faults of double squirrel cage asynchronous motors.Then,the formulas of the electromagnetic parameters of the stator and rotor circuits that can effect harmonic are derived.Finally,according to the actural parameters of the motoras simulation calculation,the effect of the air-gapfield harmonic on the inductauce parameters are analyzed.