Wireless Charging System of Inspection Robot under Primary Self-Adaption Current Control

Wireless charging series-series compensation is one of the common compensation network. Due to the temperature drift of capacitor and the change of coil self-inductance at different relative positions, the resonant cavity will change. Therefore, the transmission efficiency and power stability of the system will be affected. This paper aims to improve the stability of wireless charging output. Firstly, the wireless charging series-series compensation network model is established, and the influence of resonant cavity and load on the system output characteristics is analyzed. Then, a self-adaption primary current control method is proposed. Finally, the simulation and experimental results proved that this control method can make the system have stable output characteristics.