不平衡歪波電源駆動三相誘導電動機の脈動トルク

概要

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This paper discusses the steady-state torque, the harmonic and the amplitude of pulsating torque a 3-phase induction motor (after this abbreviated "motor") produces via an unbalanced and distorted source. Torque is the sum of steady-state torques and pulsating ones. The same harmonic and sequence between stator and rotor make a harmonic steady-state torque. In special case, fundamental makes a fundamental steady-state torque alone. The same sequence and the different harmonic make a pulsating torque whose frequency is the difference of stator harmonic from rotor one multiplied by the source angular frequency. The same harmonic and the different sequence between stator and rotor make a pulsating torque with double time frequency of fundamental. This kind of pulsating torque is the effect of an unbalanced source. The authors have contrived a convenient table which can predict all the steady-state torques and the pulsating ones from the harmonics of an unbalanced and distorted source. The amplitudes of pulsating torque were displayed with slip and unbalanced factor (three dimensions). The steady-state torques, the harmonic orders and the amplitudes of pulsating torque agree well with those measured.