A Wireless-Power-Transfer-Based Three-Phase PMSM Drive System With Matrix Converter

Wireless power transfer system has played an important role in rail transit, industrial production, and daily life. This article proposes a wireless power transfer permanent-magnet synchronous motor (WPT-PMSM) drive system based on the matrix converter (MC). The direct conversion of low-frequency ac and high-frequency ac is realized without dc link by using MC. The dual LCC compensation network is designed for better performance. In addition, a new control method has been proposed for the proposed WPT-PMSM drive to operate stably. In particular, the bidirectional power flow is achieved with the proposed WTP-PMSM drive and related control scheme. Through the mathematical modeling, the coordinated control of power converters on both sides of the coupling coil is achieved and the reactive power of the LCC compensation network is eliminated. The experiments on a 1 kW and 85 kHz laboratory prototype of the WPT-PMSM drive are presented to verify the feasibility and effectiveness of the proposed system.