Step response optimization method of switched reluctance motor

Abstract

PurposeThe purpose of this paper is to present a method of modeling the variable reluctance stepper motor using the time‐stepping finite element technique. The proposed model is used to minimize the step response overshoots considering the stator and rotor tooth geometry.Design/methodology/approachA strongly coupled field‐circuit model considering magnetic nonlinearity of the stepper motor is presented. As the main contribution, the Nelder‐Mead method of the motor geometry optimization that minimize the step response overshoots and positioning error is proposed.FindingsThe proposed method can be applied to obtain the optimal tooth/pole geometry of the stepper motor which is efficient to perform the possibly accurate positioning.Originality/valueThe paper examines the application of the presented optimization method to minimize the positioning error of the four‐phased variable reluctance stepper motor.