The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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A New Two-Phase Random Pulse Position PWM Scheme

새로운 2상 랜덤 펄스 위치 PWM기법

  • Published : 2002.04.01
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Abstract

In this paper, a new two-phase space vector RPWM(Random PWM) is proposed. In the proposed RPWM, each of two-phase PWM pulses is located randomly in each switching interval. Based on the space vector modulation technique, the duty ratio of the pulses is calculated. Along with the randomization of the PWM pulses, we can obtain the effects of spread spectra of inverter output voltage, d.c link current and audible switching acoustic noise as in the case of randomly changed switching frequency. To verily the validity of the proposed two-phase RPWM scheme, the experiment based on the Cl67 micro-controller was executed. The performance of the proposed scheme was compared with traditional PWM schemes experimentally.

본 연구에서는 각 상의 PWM 펄스를 개별적으로 랜덤하게 위치시킬 수 있는 새로운 2상 공간벡터 RPWM (Random PWM) 기법을 제안하고 있다. 제안된 방식은 각 2상 펄스들을 변조 구간 내에서 임의의 위치에 랜덤하게 배치하고 이를 기준으로 한 인버터 스위칭에 의해 고조파의 스펙트럼을 광대역화 하는 RPWM 기법이다. 제안된 방법의 타당성을 검증하기 위하여, 16비트 고성능 마이크로 콘트롤러Cl67 기반의 실험을 수행하였다 제안된 2상 RPWM에 의한 인버터 출력 선간 전압과 직류 링크 전류의 고조파 스펙트럼 및 모터의 가청 스위칭 소음 저감효과를 종전의 방식과 비교 검토하였으며, 제안된 방법의 우수성을 입증할 수 있었다.

Keywords

References

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