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Induction Motor Drives with Low Switching Acoustic Noise Based on the Two-Phase Modulated Random Lead-Lag PWM Scheme  

위석오 (한국천문연구원)
정영국 (대불대학교 전기공학과)
임영철 (전남대 전기공학과)
양승학 (호남대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.8, no.2, 2003 , pp. 151-164 More about this Journal
Abstract
In this paper, induction motor drives with low switching acoustic noise based on the 2 phase modulated RLL(Random Lead-Lag) PWM is proposed and implemented. The proposed switching method is much bettor than 3 phase modulated RLL-PWM from the standpoint of the broadening effect of the acoustic noise spectrum. Along with the randomization of PWM Pulses, SVM(Space Vector Modulation) is executed in the TMS320C31 DSP(Digital Signal Processor). To verify the validity of the proposed RPWM(Random PWM), the experimental study was tried. The experimental results show that the performance of the proposed method and the 3 phase center-aligned SVM / conventional RLL-PWM are nearly the same from the viewpoint of the constant v/f centrel. But, in case of the proposed 2 phase modulated RLL-PWM, the spectrum characteristics of the voltage and the switching acoustic noise are shown to have better broadening effect than 3 phase modulated one.
Keywords
Two-Phase Random Modulated Lead-Lag PWM; Induction Motor Drives; Mitigation of Switching Acoustic Noise;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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