Research on Constant Voltage Output Control of WPT System Based on Multi‐Parameter Identification

ABSTRACT Dynamic wireless power supply technology provides a convenient way for the energy supply of underwater vehicles. In order to solve the problem of constant voltage undercharging caused by mutual inductance fluctuation caused by water flow fluctuation and load fluctuation in the charging process, this paper proposes a constant voltage charging output control method of the wireless power transmission system based on multi‐parameter identification. Firstly, the mutual inductance and load can be identified at the same time only by measuring the current information of one channel, and the accuracy is above 97% and 96%, respectively. At the same time, according to the identification results, the constant voltage control method of fast calculation of the conduction angle is adopted, and the output voltage fluctuation of the control system can be controlled within 3% without adding additional devices.