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 describes the pulsating torques of a 3-phase induction motor via a distorted source. The steady-state torque and pulsating one can be simultaneously analyzed with consistency. The conditions of steady-state torque and pulsating one, the relation between the harmonics of a source and the angular frequencies of pulsating torque have been cleared. Torque is the sum of steady-state torques and pulsating ones. The same harmonics of stator and rotor current make the harmonic steady-state torque. The different harmonics make the pulsating torque whose frequency is the difference of stator from rotor harmonic multiplied by source angular frequency. In special case, fundamental makes fundamental steady-state torque alone. Stator and rotor current assumed to consist of two kinds of harmonic in addition to fundamental, three kinds of steady-state and pulsating torque appear. Authors propose a convenient table which can easily predict all the steady-state torques and the frequencies of pulsating torque from harmonic of a source. The table shows all the steady-state torques and the frequencies of pulsating torque. Finally, experimental data have clarified that the theory is right.