A Real-Time Positioning Strategy for Dynamic Wireless Power Supply System

In order to avoid the problem that traditional load detection system in dynamic wireless power supply system needs to be idle for a long time and cause a lot of loss, an improved real-time positioning strategy is proposed in this paper to support the switching of the system. Firstly, the magnetic field and mutual inductance of the segmented guide coil are analyzed, and the relationship between mutual inductance and three-dimensional coordinate of load is established. Secondly, the offset of the load perpendicular to the driving direction is calculated from the induced voltage of the sampling coil at the receiving end. The mutual inductance is calculated from the picking voltage of the receiving end, and the displacement of the driving direction is calculated according to the mutual inductance and the offset, so as to determine the coordinate of the load. Finally, it is verified by simulation that the proposed strategy can calculate the relative position of load and guide rail in real time, so as to avoid the no-load loss caused by the long standby of the transmitter due to the load detection, reduce the engineering cost and improve the system efficiency.