Consideration of Number of Series Turns in Switched-Reluctance Traction Motor Competitive to HEV IPMSM

This paper shows a winding design consideration of a 50-kW switched-reluctance motor (SRM) for hybrid-electric-vehicle (HEV) applications. Increasing the number of turns in stator windings is effective in reducing the maximum current; thus, the inverter current rating is reduced. However, motor output power falls significantly at high speed because of the increased back electromotive force. Continuous current operation can enhance output power at high rotational speed. In this operation, phase current is increased, and hence, the motor output power is maintained at high rotational speed. However, continuous current operation results in a decrease in efficiency. Thus, there is a tradeoff in selecting the number of series turns. In this paper, two SRMs are constructed with the same dimensions, and their performance results, i.e., torque and efficiency ranges, are compared with those of the automotive industry standard interior-permanent-magnet motor for HEV applications.

[1]  Khwaja M. Rahman,et al.  Design of high-efficiency and high-torque-density switched reluctance motor for vehicle propulsion , 2001 .

[2]  J.S. Lawler,et al.  Impact of continuous conduction on the constant power speed range of the switched reluctance motor , 2005, IEEE International Conference on Electric Machines and Drives, 2005..

[3]  S. Ogasawara,et al.  Torque Density and Efficiency Improvements of a Switched Reluctance Motor Without Rare-Earth Material for Hybrid Vehicles , 2011, IEEE Transactions on Industry Applications.

[4]  R. H. Staunton,et al.  Evaluation of 2004 Toyota Prius Hybrid Electric Drive System , 2004 .

[5]  S. Ogasawara,et al.  Design and analysis of a switched reluctance motor for next generation hybrid vehicle without PM materials , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[6]  Ka Wai Eric Cheng,et al.  Multi-Objective Optimization Design of In-Wheel Switched Reluctance Motors in Electric Vehicles , 2010, IEEE Transactions on Industrial Electronics.

[7]  Wei Wu,et al.  A switched-reluctance motor/generator for mild hybrid vehicles , 2008, 2008 International Conference on Electrical Machines and Systems.

[8]  A.K. Jain,et al.  Study of new stator pole geometry for improvement of SRM torque profile , 2005, IEEE International Conference on Electric Machines and Drives, 2005..

[9]  Y. Takano,et al.  Operating area of a Switched Reluctance Motor with continuous current operation , 2010, IEEE PES General Meeting.

[10]  Bernard Multon,et al.  Improvement in the field-weakening performance of switched reluctance machine with continuous mode , 2007 .

[11]  Akira Chiba,et al.  Power and efficiency measurements and design improvement of a 50kW switched reluctance motor for Hybrid Electric Vehicles , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[12]  N. Matsui,et al.  Development of high torque density and efficiency vswitched reluctance motor with 0.1mm short airgap , 2007, 2007 European Conference on Power Electronics and Applications.

[13]  Tiecheng Wang,et al.  Research on switched reluctance double-rotor motor used for hybrid electric vehicle , 2008, 2008 International Conference on Electrical Machines and Systems.

[14]  Shuanghong Wang,et al.  Implementation of a 50-kW four-phase switched reluctance motor drive system for hybrid electric vehicle , 2005 .

[15]  J.S. Lawler,et al.  Issues in the Control of the Switched Reluctance Motor During Continuous Conduction , 2007, 2007 39th North American Power Symposium.

[16]  Howard C. Lovatt,et al.  Voltage control of switched reluctance machines for hybrid electric vehicles , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[17]  D. Mazur,et al.  Operation of the switched reluctance motor at continuous conduction of phase current , 2006, MELECON 2006 - 2006 IEEE Mediterranean Electrotechnical Conference.

[18]  I. Miki,et al.  Driving force characteristics of 40kW switched reluctance motor for electric vehicle , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[19]  R. S. Wallace,et al.  Design of a 100 kW switched reluctance motor for electric vehicle propulsion , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[20]  Nobuyuki Matsui,et al.  Optimum Design Approach for a Two-Phase Switched Reluctance Compressor Drive , 2010, IEEE Transactions on Industry Applications.

[21]  D. Howe,et al.  Design of a Switched Reluctance Machine for Extended Speed Operation , 2009, IEEE Transactions on Industry Applications.

[22]  Demba Diallo,et al.  Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study , 2005, IEEE Transactions on Vehicular Technology.

[23]  S. Matsumoto.  Advancement of hybrid vehicle technology , 2005, 2005 European Conference on Power Electronics and Applications.

[24]  David G. Dorrell,et al.  Comparison of different motor design drives for hybrid electric vehicles , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[25]  T. J. E. Miller.  Optimal design of switched reluctance motors , 2002, IEEE Trans. Ind. Electron..

[26]  Hai-Jiao Guo,et al.  A novel torque control for a SR motor EV , 2008, 2008 18th International Conference on Electrical Machines.

[27]  A.M. Omekanda.  A new technique for multi-dimensional performance optimization of switched reluctance motors for vehicle propulsion , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[28]  Shuanghong Wang,et al.  Implementation of a 50-kW four-phase switched reluctance motor drive system for hybrid electric vehicle , 2005, IEEE Transactions on Magnetics.

[29]  Mickaël Hilairet,et al.  Design of an SRM Speed Control Strategy for a Wide Range of Operating Speeds , 2010, IEEE Transactions on Industrial Electronics.

[30]  T. Kosaka,et al.  Magnetization characteristics analysis of SRM by simplified non-linear magnetic analysis , 2002, Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579).