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Power Spectrum of Two-Phase and Three-Phase RCD-PWM Scheme for Switching Noise Reduction of Induction Motors  

위석오 (한국천문연구원 전파부)
정영국 (대불대 컴퓨터정보공학부)
임영철 (전남대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.9, no.2, 2004 , pp. 178-186 More about this Journal
Abstract
This paper proposes a two-phase RCD-PWM scheme which is much better than a three-phase RCD-PWM scheme from the standpoint of the broadening and linearizing effect of the power spectrum. To implement the proposed scheme and conventional scheme, the experiment based on the SAB-Cl67 micro-controller was executed. Based on the space vector modulation technique, the duty ratio of the pulses is calculated using the SAB-Cl67 and each of PWM pulses is located randomly in each switching interval. The power spectrum of the output voltage, output current, the d.c link current and the acoustic noise radiated from inverter drives are experimentally investigated. 1'hen, the performance of the proposed scheme was compared and discussed with the conventional scheme.
Keywords
RCD-PWM(Random pulse centered displacement PWM); Switching noise reduction; Power spectrum; Inverter drives;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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