Effect of Winding Configuration on Six-Phase Induction Machine Parameters and Performance

Ayman S Abdel-Khalik,Mahmoud S Abdel-Majeed,Shehab Ahmed

doi:10.1109/access.2020.3044025

Ayman S Abdel-Khalik, Mahmoud S Abdel-Majeed + Show 1 more

Open Access

https://doi.org/10.1109/access.2020.3044025

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Abstract

Six-phase induction machines have mostly shown promise in high-power electric drive applications as well as wind energy conversion systems. Different winding configurations for six-phase stators have been published, namely, dual three-phase (D3P), symmetrical six-phase (S6P), and asymmetrical six-phase (A6P) winding layouts. Although a body of research investigating six-phase machines and their control for different six-phase winding arrangements exists, a thorough comparative study between these different arrangements in terms of machine parameters and performance, has not been done so far. This paper employs a 12-phase stator with a configurable terminal box to compare different six-phase configurations by simply reconnecting the stator terminals of the twelve phases in different manners to obtain an equivalent six-terminal stator. This way, the same stator machine dimensions and copper volume will be assumed for all connections. The comparative study focuses on the effect of winding connection on machine parameters of the different subspaces, phase current quality and machine characteristic curves. Experimental validation has been carried out using a 1kW prototype system.

Highlights

Employing polyphase machines with high phase order in high power safety-critical applications has attracted the attention of both academia and industry in the last two decades
This paper investigates the effect of stator connection of a six-phase induction machine on the machine sequence parameters, characteristic curves and current waveform
In the case of D3P or S6P, the number of rotor bars should be properly selected to avoid rotor slot harmonics induced in the phase current waveform

Summary

Introduction

Employing polyphase machines with high phase order in high power safety-critical applications has attracted the attention of both academia and industry in the last two decades This was driven by the concurrent need for high performance drive systems as well as rigorous reliability standards [1], [2]. The most up-to-date research has diligently continued to shed light on the numerous advantages of this promising technology in different applications. To this end, recent literature has addressed many of the challenges, including but not limit to: control [3]-[7], modelling [8]-[10], improved winding layout designs [11,12,13,14], and innovative applications [15],[16].

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