Optimal Design and Control of a Decoupled Multifrequency Multiphase Wireless Switched Reluctance Motor Drive System
Jun Cai, Bin Li, Adrian David Cheok, Ying Yan, Xin Zhang
Abstract
In this paper, the optimal design and control of a decoupled multi-frequency multi-phase wireless switched reluctance motor (SRM) drive system is presented. In the proposed system, the single or dual phase windings of the SRM can be selectively excited by varying the operating frequencies of the inverter. The overall design procedure of the system topology is presented to achieve the stable operation of the SRM and improve the transmission efficiency. In detail, cross interference can be suppressed with the secondary trap filters, while the primary compensation network is designed to achieve power equalization of the targeted phases and the soft switching of the inverter. Additionally, a dual-state drive method is used to control a single inverter. This method includes a single-frequency half-bridge- driven state and a dual-frequency full-bridge-driven state, which are respectively applied to the single-phase excitation mode (SPEM) and the dual-phase excitation mode (DPEM), thereby reducing voltage ripples during mode switch. Finally, the hybrid excitation strategy, which is integrated with the dual-state drive method, is utilized to switch the excitation modes, thus achieving the overlapped conduction of the windings and commutation control of the SRM. The feasibility of the proposed system is verified via experiments.