Backstepping Control of a Switched Reluctance Motor with Inter-Turn Short-Circuit

Abstract

Improving the behavior of speed control in electric vehicles is currently a major challenge for re- searchers and engineers. For this study, we chose the context of a Switched Reluctance Motor (6/4 SRM) used in a hybrid Electric Vehicle with Extended Range (EREV). Speed regulation is an essential feature on long-distance trip. Speed regulators of backstepping type are very effective in this context given the non- linear nature of switched reluctance motors. The esti- mation of non-linear quantities, flux and inductance, uses Legendre polynomials. The control strategy uses four regulators, one for speed and three for stator cur- rents. It is based on the Torque Sharing Function (TSF) and the Torque Inverse Model (TIM). Our sim- ulation consists of studying the behavior of this type of control when an Inter-Turn Short-Circuit (ITSC) fault appears on one of the phases of the 6/4 SRM. In this paper, we are interested in temporal behavior of phasic currents and we will show the interest of these quanti- ties as fault indicators allowing the real time diagnosis of this type of controller-machine.