Five-phase permanent magnet synchronous machine under consideration of the third current harmonic

Zimmermann, Marco; Centner, Matthias; Stiebler, Manfred

doi:10.1109/icelmach.2016.7732916

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…The independent generation of output voltage components (fundamental and third harmonic frequencies) can improve the nominal torque of five-phase motors with a quasirectangular air-gap flux of up to 15%. The torque can be enhanced through the injection of the third harmonic into the motor current [3][4][5][6]. For a two-motor system supplied by one inverter, the first and third harmonic components of the inverter output voltage have to be generated and controlled independently.…”

Section: Introductionmentioning

confidence: 99%

Modified SPWM Technique with Zero-Sequence Voltage Injection for a Five-Phase, Three-Level NPC Inverter

et al. 2021

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This article presents a modified sinusoidal pulse-width modulation (SPWM) scheme for a five-phase, three-level neutral-point-clamped inverter. The modulation scheme deploys a modified min–max function to inject the zero-sequence components into the reference modulating signals; hence enabling the effective utilization of the DC-link voltage. Balanced split-input DC-link voltages were achieved through further incorporation of adjustable voltage-dependent variables into the reference signals. The dynamic performance of the control approach is demonstrated through simulations and experiments on a laboratory inverter prototype; the results are well presented.

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Section: Introductionmentioning

confidence: 99%

Modified SPWM Technique with Zero-Sequence Voltage Injection for a Five-Phase, Three-Level NPC Inverter

et al. 2021

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Torque Ripple Reduction Method in a Multiphase PM Machine for No-Fault and Open-Circuit Fault-Tolerant Conditions

Akay

Lefley

2021

Energies

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This paper presents a method that has been developed to reduce the torque ripples under healthy and open-circuit fault-tolerant (OCFT) conditions for a multiphase permanent magnet (PM) machine. For smooth torque, both the phase current and the back electromotive force (back-EMF) should be purely sinusoidal. To improve the torque in a multiphase machine, higher-order current harmonics are injected, which are related to the harmonics in the back-EMF. For this reason, generally, multiphase machines are designed with higher-order back-EMF harmonics. However, these harmonics produce ripples in the torque. In light of this, a torque ripple cancellation method has been developed that first determines an additional current component from the harmonic content of the back-EMF and then injects these additional components to cancel the torque ripple. It has been found that this new torque ripple cancellation method works for both faultless and faulty conditions in a five-phase PM machine. The method has been validated using Finite Element Analysis, and the results are presented in this paper.

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Five-phase permanent magnet synchronous machine under consideration of the third current harmonic

Cited by 2 publications

References 9 publications

Modified SPWM Technique with Zero-Sequence Voltage Injection for a Five-Phase, Three-Level NPC Inverter

Modified SPWM Technique with Zero-Sequence Voltage Injection for a Five-Phase, Three-Level NPC Inverter

Torque Ripple Reduction Method in a Multiphase PM Machine for No-Fault and Open-Circuit Fault-Tolerant Conditions

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