Contribution of Current Harmonics to Average Torque and Torque Ripple in Switched Reluctance Machines
| Autor: | Zi-Qiang Zhu, Beomseok Lee, W. Q. Chu, Liren Huang |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Physics 020208 electrical & electronic engineering 02 engineering and technology 01 natural sciences Switched reluctance motor Electronic Optical and Magnetic Materials Reluctance motor Direct torque control Control theory Harmonics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Torque Torque sensor Torque ripple Electrical and Electronic Engineering Damping torque |
| Zdroj: | IEEE Transactions on Magnetics. 53:1-9 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2016.2633477 |
| Popis: | This paper investigates the contribution of current harmonics to average torque and torque ripple in switched reluctance machines. In order to account for the magnetic saturation under different current amplitudes and waveforms, the self-inductances are obtained by finite element calculation using frozen permeability method and subsequently used in the analytical derivation of an instantaneous torque equation based on the Fourier series analyses. Five different current waveforms are also considered in order to identify the contribution of current harmonics. It is found that the average torque is mainly contributed by the dc, first, and second current harmonics. Meanwhile, the fourth and fifth current harmonics have high influence on the torque ripple but much lower contribution to the average torque. In addition, the optimization of current waveforms in terms of the maximum average torque under a given RMS current is also discussed. All analytical analyses are validated by direct nonlinear finite element and experimental results. |
| Databáze: | OpenAIRE |
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