Novel random pulse position modulation for three-phase four-leg inverters
| Autor: | Haopeng Wu, Chenghao Fu, Dinghui Wu, Tinglong Pan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Harmonic reduction Balance (metaphysics) Three-phase Control and Systems Engineering Control theory Mechanical Engineering 020208 electrical & electronic engineering Pulse-position modulation 0202 electrical engineering electronic engineering information engineering Harmonic 02 engineering and technology |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering. 232:541-549 |
| ISSN: | 2041-3041 0959-6518 |
| Popis: | Aiming at improving the harmonic spectra spreading effect, two randomized pulse position modulation strategies are proposed for three-phase four-leg inverters. Based on the volt-second balance law and the fixed switching frequency, the first proposed strategy places the center randomly during one carrier cycle with a limited degree of freedom, and the second proposed strategy randomly changes the carrier slope in each carrier cycle. To get better randomization effect of the proposed strategies, Well Equidistributed Long-period Linear algorithm was introduced to generate random numbers. In order to verify the validity of the proposed strategies, the modulation strategies are implemented with dSPACE DS1007-based real-time operating system. The experimental results show that the proposed strategies have dispersed the discrete harmonics to a wider sideband. Compared with the first strategy, a larger degree of freedom can be achieved in the second proposed strategy with lower harmonic spikes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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