In order to avoid adding redundant switching devices and additional passive components in the coupling mechanism of the inductive wireless power transmission system,and to reduce the switching loss of the fully-controlled switching devices when the system operates at high frequency and high power,proposes a closed-loop control method based on the improved ZVT Buck circuit is proposed to achieve the constant current and constant voltage charging of the battery.By analyzing the working mode of the improved ZVT Buck circuit and designing the circuit parameters,it is ensured that the DC-DC converter works in a soft switching state during the whole charging process.Finally,an experimental platform with a charging current of 35 A and a charging voltage of 370 V was built to verify the feasibility of the method,this method is simple in control and reducing the complexity of the system circuit structure,and the transmission efficiency is relatively high.The method can meet the requirements of constant curr-ent and constant voltage charging.
关键词
感应式无线电能传输/改进型ZVTBuck电路/恒流恒压充电/软开关
Key words
inductive wireless power transfer/improved ZVT Buck circuit/constant current and constant voltage charging/soft switch
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