Redundancy and Fault-Tolerant Design of Rotational MIMO Wireless Power Transfer System

Wireless power transfer (WPT) technology provides a new energy transmission solution, which completely removes the shackles of wires. Although the magnetic coupler of the WPT system has a high degree of integration, it can still avoid power fluctuation and even system failure in long-term work. In this paper, some early works of redundancy and fault-tolerant design in WPT systems are reviewed, and a kind of redundancy and fault-tolerant design method of the rotational wireless power transfer system is proposed. Both passive and active fault-tolerant control (FTC) methods for the WPT system were put forward at the same time. Two redundant coil structures of the magnetic coupler are designed by magnetic and circuit fault tolerance method of the multi-input multi-output (MIMO) WPT system. By monitoring real-time electromagnetic parameters, the fluctuation and fault of the WPT system can be quickly diagnosed and removed, and the derating operation state can be realized in time.