Control strategy of integrated charger base on split-winding switched reluctance motor drive

This paper presents a control strategy of integrated switched reluctance motor(SRM) base on split-winding method. A novel SRM converter topology which integrated driving mode and battery charger are proposed in EV application. Due to integrate the winding of motor, the boost inductance is limited by the phase winding of the motor, so the performance of the integrated battery charger is cut down. In the proposed integrated motor drive, a novel converter topology and split-winding method are used to reduce the inductance and resistor of boost inductance and obtain high performance. Compared with conventional asymmetric converter, a relay and two thyristors are added in the proposed circuit. This topology can be rebuilt as a bridgeless buck-boost battery charger to satisfy the battery charging requirement. The split-winding design of SRM is analyzed in magnetic field by finite element method. The symmetrical magnetic field of the split-winding of phase A and B is easy to product the zero torque in battery charger mode. The operational modes of two functions are introduced in detail. The control strategy of proposed drive is suggested to more stable working. Some simulation results are done to verify the performance of proposed converters.