Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2001.10a
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- Pages.150-156
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- 2001
A DSP based Randomly Modulated Carrier PWM Scheme
DSP기반의 케리어 변조 Random PWM 기법
- Kim, Hoe-Geun (Dept. of Electrical Eng. Chonnam National University) ;
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Lim, Young-Cheol
(Dept. of Electrical Eng. Chonnam National University)
;
- Na, Seok-Hwan (How) ;
- Kim, Young-Cheol (Dept. of Electrical Eng. Daebul University) ;
- Jung, Young-Gook (Dept. of Electrical Eng. Daebul University)
- Published : 2001.10.26
Abstract
This paper describes an implementation of the DSP(Digital Signal Processor) based triangular carrier frequency modulated RPWM inverter drive system. The power spectrum of the noise emitted from the induction motor was measured in the anechoic chamber. The analysis of the sources for the acoustic noise and the effects of the noise reduction are confirmed by the measured spectra of the noise. Real-time RPWM along with the speed control was achieved by high speed DSP. By changing the center frequency and the bandwidth of the carrier, the proposed real-time RPWM scheme can be used as an efficient switching frequency band acoustic noise reduction method for the inverter drive system with variant load conditions.
Keywords