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http://dx.doi.org/10.5207/JIEIE.2008.22.12.064

Pseudo-Randomized Frequency Carrier Modulation Scheme with Improved Harmonics Spectra Spreading Effects  

Kim, Jong-Nam ((주)셀런 하드웨어실)
Jung, Young-Gook (대불대학교 융합기술학부)
Lim, Young-Cheol (전남대학교 전기공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.22, no.12, 2008 , pp. 64-70 More about this Journal
Abstract
In case that conventional PRC(Pseudo-Randomized Frequency Carrier) modulation scheme is applied to a three-phase HBML(H-Bridge Multi-Level Inverter), the dominant harmonics spectra appear at twice switching frequency. In this paper, the dominant harmonics spectra spreading effect of the conventional PRC scheme was improved by using three stage MUXs(Multiplexers) and two triangular carriers with fixed frequency which has mutual relation of the twice frequency. To confirm the validity of the improved PRC scheme, the experiment were performed on a 1.5[kw] three-phase HBML based induction motor drives. And, the harmonics spectra of the conventional and improved PRC schemes are compared and discussed.
Keywords
Improved pseudo-randomized frequency carrier modulation scheme; Harmonics spectra spreading effect; Three-phase HBML drives;
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