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Information Technology Journal

Year: 2014 | Volume: 13 | Issue: 5 | Page No.: 816-823
DOI: 10.3923/itj.2014.816.823
Study on A New Hybrid Random Space Vector Pulse Width Modulation Strategy
Guoqiang Chen, Jianli Kang and Junwei Zhao

Abstract: The random space vector pulse modulation (SVPWM) strategy can weaken the harmonic spectrum peaks on or around the switching frequency and its multiple ones. The randomization makes the hardware and software system complex, so it is important to develop new random SVPWM strategy that can be realized easily. Aiming at the complexity and characteristic of hybrid random space vector pulse modulation (SVPWM), the study proposes a new hybrid random SVPWM strategy. The strategy is controlled by two random variables, one of which is to control the duration time partitioning method to two zero-vectors, the other of which is to control the pulse positioning method. The new hybrid random SVPWM strategy can be realized in many digital micro control units. Three-phase currents can be measured in the middle of a switching period because the ripple currents are zero or almost zero in the middle of a switching period for inductive load. The macro Harmonic Distortion Factor (HDF) formula of the hybrid random SVPWM strategy is deduced. Finally, using Monte Carlo method the macro HDF characteristic is analyzed and using flux/current/voltage trajectory triangles the phase ripple current and switching pulse are discussed by computer simulation. The theoretical analysis and simulation results show the excellent performance and advantages.

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How to cite this article
Guoqiang Chen, Jianli Kang and Junwei Zhao, 2014. Study on A New Hybrid Random Space Vector Pulse Width Modulation Strategy. Information Technology Journal, 13: 816-823.

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