Abstract
In order to better address the problem of many high-order harmonics' concentration in the output voltage, a novel five-phase piecewise-random-switching-frequency space vector pulse width modulation (PRSF-SVPWM) strategy is proposed for a five-phase voltage source inverter. Compared to the conventional random switching frequency SVPWM (RSF-SVPWM), the entire fundamental period of this method is divided into two half-fundamental periods, so the original switching frequency in a single fundamental period is randomized in segments respectively. During this process, parameters named the offset frequency and random frequency are defined and assigned reasonably. In this way, high-frequency harmonics in one period are spread into a wider range. Subsequent simulation and experimental results verify that the proposed random modulation strategy can further reduce amplitudes of harmonics near switching frequency and its integer multiples, even though within a narrow switching frequency range, and a satisfactory effect of high-order harmonic dispersion is finally obtained, which contributes to the application and popularization of random pulse width modulation strategies.
Original language | English |
---|---|
Article number | 9305224 |
Pages (from-to) | 2339-2347 |
Number of pages | 9 |
Journal | IEEE Transactions on Energy Conversion |
Volume | 36 |
Issue number | 3 |
DOIs | |
Publication status | Published - Sept 2021 |
Externally published | Yes |
Keywords
- High-order harmonic dispersion
- PRSF-SVPWM
- Random modulation strategy
- Switching frequency
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering