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A Pseudo-Random Carrier PWM Technique by Fixed Frequency Carrier Composition  

Kim, Jong-Nam (전남대 공대 전기공학과)
Jung, Young-Gook (대불대 컴퓨터정보공학부)
Lim, Young-Cheol (전남대 공대 전기공학과)
Park, Sung-.Jun (전남대 공대 전기공학과)
Kim, Kwang-Heon (전남대 공대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.54, no.11, 2005 , pp. 547-552 More about this Journal
Abstract
This paper describes a pseudo-random carrier PW technique for the power converters. The proposed method generates a new pseudo-random carrier by randomly composing a carrier with fixed frequency and a carrier with opposition phase. To confirm the validity of the proposed method, a single-phase multi-level inverter was implemented and tested. The experimental results show that the output voltage and current harmonics spectra of an inverter have broadening effect of harmonics, as only simple composition of fixed frequency carries.
Keywords
Pseudo-Random Frequency Carrier, Random PWM; Cascade Multi-Level Inverter; Power Spectra;
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