Outer loop controller design of a switched reluctance motor driven system

Abstract

The development of an outer loop PID controller, feed-forward controller and the combination of both PID and feed-forward controller for a switched reluctance motor (SRM) drive is presented in this paper. A small signal model of the SRM is derived to linearize the overall control system. The PID and feed-forward controllers are developed from the linear controls theory. The PID controlled SRM drive causes the motor to dither during position hold due to the strong nonlinear properties of the system. A new controller described in this paper combines the use of PID and feed-forward controls. The use of the feed-forward path helps avoid the dithering and reduce the acoustic noise in the SRM.