Analysis of Inverter Input Current for Five-Phase PMSM Considering Third Harmonic Back-EMF

Résumé fourni par la source

This paper proposes a novel inverter input current analysis method for five-phase PMSM drive systems that incorporates third harmonic back-EMF effects, typically overlooked in traditional studies focused only on fundamental components. Through theoretical analysis and experimental validation, we demonstrate that third harmonic counter electromotive force significantly alters inverter input current harmonic characteristics. We develop an accurate mathematical model of the five-phase system input current including third harmonic components and analyze dc bus current characteristics. Experimental results confirm our analytical method can reduce prediction error compared to traditional approaches. This research provides essential theoretical support for capacitor selection and thermal management in five-phase drive systems, enhancing system reliability and power density.

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