Research On Key Technologies Of Inductive Coupled Power Transfer System

Inductive Coupled Power Transfer (ICPT) has attracted wider and wider spread attention recently as an emerging research field. This techonoly is based on electromagnetic induction, power electronics and modern control theory. It makes contactless energy transfer become true. Besides convenient and quick charging for electronic devices, ICPT can be widely used for charging in many areas including transportation, medical, industry and so on.This paper introduces the operation principle of ICPT and analyses the key technologies of it. Based on the mathematical model of full-bridge phase-shift topology, it analyses the circuit in detail and get a general idea for circuit design. Through the analysis of converter topology, this system use the full-bridge topology. Moreover, it analyses the resonant compensation network and derive the output power, resonant capacitor and equivalent circuit impendance to simulate some part of them.This paper analyses the magnetic and core structure of detachable transformer according to its features, and choose the core material as well. In addition, it research the coupling efficiency for kinds of location of windings and the gap. Based on the mutual inductance model, it makes model for the detachable transformer and calculate the circuit. The paper also simulate the effect of various parameters to the transfer efficiency.This paper designs a new phase-shift half-control circuit based on the operation principle of phase-shift control using HIP4081. In addition, it uses a simple logic gates to generate phase-shift signal. The paper designs the circuit parameters including transformer, rectifier, MOSFET, filter capacitor and inductance. Small signal model and its equivalent circuit are derived by using switching network average model method. The corresponding transfer function are derived from them. The paper then simulate the model in frequency, and designs the compensate network based on the model.This paper proposes the whole ciucuit design based on primary and secondary compensation, detachable transformer and feedback control method. It simulate every part of the circuit to verify it. Based on the practical ciucuit, the paper analyses the effect of transfer efficiency in contactless energy transfer system. At last, make the actual switch power (48V in,12V out) design and meet the requirements basically.