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High Performance PI Current Controller for a Switched Reluctance Motor

  • Ashoornejad, A. (Dept. of Electrical and Computer Engineering of Isfahan University of Technology) ;
  • Rashidi, A. (Dept. of Electrical and Computer Engineering of Isfahan University of Technology) ;
  • Saghaeian-nejad, S.M. (Dept. of Electrical and Computer Engineering of Isfahan University of Technology) ;
  • Ahn, Jin-Woo (Dept. of Mechatronics Engineering, Kyungsung University)
  • Received : 2014.09.08
  • Accepted : 2014.10.15
  • Published : 2014.12.01

Abstract

The most common current controller for the Switched Reluctance Motor (SRM) is the hysteresis controller. This method, however, suffers from such drawbacks as variable switching frequency, consequent audible noise and high current ripple. These disadvantages make this controlling method undesirable for many applications. The alternative solution is the PI controller. Since the fixed gain PI current controller can only be optimized for one operating point, and on the other hand, SR motor is highly nonlinear, PI controller gain should be adjusted according to incremental inductance. This paper presents a novel method for PI current controller gain adaptation which is simple and yields a good performance. The proposed controller has been implemented on a test bench using a eZdsp F28335 board. The performance of the current controller has been investigated in both simulation and experimental tests using a four-phase 8/6 4KW SRM drive system.

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