2중 영벡터 모드를 갖는 2상 공간벡터 SRP기반 유도모터 구동시스템의 스위칭 소음과 전도 노이즈

Switching Noise and Conducted Noise of Two-Phase Space Vector SRP based Induction Motor Drives with Double Zero Vector Modes

In case while modulation index (M) is more than 0.7, the spectrum of motor voltage and current of a conventional two-phase SRP scheme are not reduced considerably. To solve the problems of a conventional two-phase SRP, this paper proposes a two-phase SRP(DZSRP) with double zero vector mode which zero vector is selected as V(111) in case of M $\geq$ 0.7, and zero vector is selected as V(000) if M < 0.7. For the validity of the proposed method, a 16 bit micro-controller C167 was used and the experiments were conducted with the 1.5kw induction motor under load condition. And the experimental results show that the switching noise spectrum for all the M are spread to a wide band area. Also the switching noise and conducted noise are discussed.