A Novel Wireless Switched Reluctance Motor with Improved Current Commutation

The integration of wireless power transfer (WPT) with motor drive yields wireless motor systems that offer exceptional remote operability, enabling features of waterproofing, dustproofing, and maintenance-free operation. Among various motor types, wireless switched reluctance motors (WSRMs) have garnered significant attention due to their simple drive circuits and straightforward operation modes. However, despite these merits, traditional WSRMs have the defect of current commutation, which impedes the effective feedback of energy stored in the winding. This inefficiency results in low performance and narrow load operating capabilities. To address these challenges, this paper introduces a novel WSRM with energy feedback capability by utilizing multi-channel WPT. Initially, the operational mode of conventional WSRMs is examined to demonstrate their constrained speed-load range. Following this, an in-depth analysis of the proposed WSRM system is presented, detailing its circuit architecture, operational dynamics, and load operation capacity. Additionally, closed-loop speed control is proposed to energize the WPT channels based on the motor angle, thereby regulating the winding current and facilitating motor drive. An experimental platform capable of reaching a maximum speed of 1500 rpm and supporting a 1.3 N·m load is constructed to validate the efficacy of the proposed system.