Comparison of Electromagnetic Perturbations and Commutation Losses between Self-Switching and PWM Mode of Current Control in a Switched Reluctance Motor.

In a previous paper we have shown the interest of the bilifilar winding in SRM feed by low voltage (automotive application). The interest is the minimization of switche number and of silicon area. In this paper, we propose to continue the study of a new control method with this feeding process structure (with one swich per phase). This method minimizes electromagnetic perturbations (by reducing gradient), commutation losses of switches and allows the use of standard diodes instead of fast recovery diodes. We will compare this new control method mode with the PWM one. We will show, for example, at the same average torque value, that switching commutation losses are notably lower than in PWM control and that total losses of the motor -converter set remains constant.