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Power Spectra of the Hybrid Random PWM(HRPWM) Technique Adopting a Random Triangular Carrier  

Kim Ki-Seon (전남대 대학원 전기공학과)
Lim Young-Cheol (전남대 전기공학과)
Park Sung-Jun (전남대 전기공학과)
Kim Kwang-Heon (전남대 전기공학과)
Jung Young-Gook (대불대 컴퓨터정보공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.10, no.5, 2005 , pp. 501-507 More about this Journal
Abstract
This paper proposes a Hybrid Random PWM(HRPWM) technique using a LF2407 DSP board in order to spread the power spectra of an induction motor. The proposed method is composed to the PRBS (Pseudo-Random Binary Sequence) with the Lead-Lag random bit and the random triangular carrier for the logical comparison. Also, a DSP generates the random number, the PRBS and the three-phase reference signal, a MAX038 chip operating as frequency modulator generates the random triangular carrier. For verification of the proposed method, the experiments were conducted with a three-phase adjustable speed a.c drives, and the results of simulations and experiments are presented.
Keywords
Hybrid Random PWM(HRPWM); Random Bit Generator; PRBS(Pseudo Random Binary Sequence); Power Spectra Spread;
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