대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2002년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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- Pages.82-89
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- 2002
새로운 2상 랜덤 펄스 위치 PWM기법에 의한 모터 구동 시스템의 가청 스위칭 소음 저감
Reduction of Audible Switching Acoustic Noise in Motor Drives by a New Two Phase Random Pulse Position PWM Scheme
- Wi, Seog-Oh (Chonnam National University) ;
- Lim, Young-Cheol (Chonnam National University) ;
- Na, Seok-Hwan (How) ;
- Jung, Young-Gook (Daebul University)
- 발행 : 2002.04.25
초록
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 verify the validity of the proposed two-phase RPWM scheme, the experiment based on the C167 micro-controller was executed. The performance of the proposed scheme was compared with traditional PWM schemes experimentally.
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