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Performance analysis of segmented rotor switched reluctance motors with three types of winding connections for belt-driven starter generators of hybrid electric vehicles

Xiaodong Sun (Automotive Engineering Research Institute, Jiangsu University, Zhenjiang, China)
Zhuicai Zhou (Jiangsu University, Zhenjiang, China)
Long Chen (Jiangsu University, Zhenjiang, China)
Zebin Yang (Jiangsu University, Zhenjiang, China)
Shouyi Han (Jiangsu University, Zhenjiang, China)

Abstract

Purpose

Inductance, torque and iron loss are the key parameters of switched reluctance motors for belt-driven starter generators. This paper aims to present the analysis of a segmented rotor switched reluctance motor (SSRM) with three types of winding connections for hybrid electric vehicle applications by using a two-dimensional finite element method.

Design/methodology/approach

The rotor of the studied SSRM consists of a series of discrete segments, while the stator is made up of exciting and auxiliary teeth. First, the concept and structures of the different winding connections are introduced. Then, the magnetic flux path of the three types of winding connections for the SSRM is described. Second, the magnetic flux distributions in the three parts, i.e. the stator yoke, the stator tooth and the rotor segment, are described in detail to calculate the iron losses. Third, three SSRMs with the different winding arrangements are analyzed and compared to evaluate the distinct features of the studied SSRM. The analysis and comparison mainly include self-inductances, mutual inductances, phase currents, output torque and iron loss.

Findings

It is found that the self-inductances of the three types of winding connections are almost equal, and only the SSRM1 has a positive mutual inductance. In addition, the current waveforms of SSRM1 and SSRM2 are regular. However, it is irregular in SSRM3. It is shown that SSRM1 has better characteristics, such as higher output torque, high power density, lower torque ripple and iron loss.

Originality/value

This paper proposes and analyzes three novel winding connections for the SSRM to provide guidance for enhancing the output torque and reducing the iron loss to achieve high efficiency.

Keywords

Acknowledgements

This work was supported by the National Natural Science Foundation of China under Projects 51305170, 51475214 and 51475213, the Natural Science Foundation of Jiangsu Province of China under Project BK20170071, the Key Project of Natural Science Foundation of Jiangsu Higher Education Institutions under Project 17KJA460005, Six Categories Talent Peak of Jiangsu Province under Projects 2015-XNYQC-003 and 2014-ZBZZ-017, the “333 project” of Jiangsu Province under Project BRA2017441 and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Citation

Sun, X., Zhou, Z., Chen, L., Yang, Z. and Han, S. (2018), "Performance analysis of segmented rotor switched reluctance motors with three types of winding connections for belt-driven starter generators of hybrid electric vehicles", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 37 No. 3, pp. 1258-1270. https://doi.org/10.1108/COMPEL-08-2017-0342

Publisher

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Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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