A Constant Current Control Strategy for Transmitter of Three-phase Dynamic Wireless Power Transmission System to Suppress Input Voltage Fluctuation

For the problem that the input voltage of power supply side of electric vehicle dynamic wireless power transmission system fluctuating, causing the transmitter current to change and the voltage of receiver to be unstable. This paper analyzes the relationship between the rectified output voltage of input side, inverter circuit duty cycle and transmitter current. According to the relationship, a constant current control strategy for transmitter current is proposed, which is realized by adjusting the inverter circuit duty cycle accordingly by detecting the input side rectified output voltage. This paper constructs a three-phase dynamic wireless power transmission system simulation model and experimental system. Simulation and experimental results show that the method is effective and easy to implement.