Design of IPT charging system based on improved ZVT Buck circuit
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.
inductive wireless power transferimproved ZVT Buck circuitconstant current and constant voltage chargingsoft switch
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维普
