Operating Strategies of Switched Reluctance Machines for Exhaust Gas Energy Recovery Systems

This paper presents an operating strategy for high-speed switched reluctance (SR) generators employed in exhaust gas energy recovery systems. The machine is operated in “single pulse” mode, and a parametric study of the control angles is performed to analyze the machine operation. It is shown that, for given speed and power, optimum sets of control angles exist, which achieve maximum machine efficiency and minimum thermal stress. This study is undertaken using a coupled nonlinear modeling approach, combining magnetostatic finite-element analysis with time-domain circuit simulation. The results are compared with measurements performed on an SR generator designed for a prototype exhaust gas energy recovery system, showing overall good agreement.

[1]  T.J.E. Miller,et al.  Nonlinear theory of the switched reluctance motor for rapid computer-aided design , 1990 .

[2]  J. Corda,et al.  Variable-speed switched reluctance motors , 1980 .

[3]  D. Howe,et al.  Dynamic model of a switched reluctance machine for use in a SABER based vehicular system simulation , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[4]  F. Soares,et al.  Simulation of a 6/4 switched reluctance motor based on Matlab/Simulink environment , 2001 .

[5]  G. Bertotti,et al.  Physical interpretation of eddy current losses in ferromagnetic materials. I. Theoretical considerations , 1985 .

[6]  D. Howe,et al.  Modelling and Testing of a Turbo-generator System for Exhaust Gas Energy Recovery , 2007, 2007 IEEE Vehicle Power and Propulsion Conference.

[7]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .

[8]  Timothy J. E. Miller.  Switched reluctance machines , 2004 .

[9]  P. Biringer,et al.  A simple method of estimating the minor loop hysteresis loss in thin laminations , 1978 .

[10]  Yoichi Hayashi,et al.  A new approach to calculating core losses in the SRM , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[11]  Kais Atallah,et al.  The calculation of iron losses in brushless permanent magnet dc motors , 1994 .

[12]  Geraint W. Jewell,et al.  Design of a High Speed Switched Reluctance Machine for Automotive Turbo-Generator Applications , 1999 .