Tuning Method Based T-model for LCC/S Compensated IPT System with Constant Current Output Characteristics

Recently, inductive power transfer (IPT) systems have experienced a rapid development and applied in many applications due to its advantages of safety and convenience for transferring energy without physical contact. In this paper, a new tuning method for LCC/S compensated topology is proposed based the T-model of loosely coupled transformer (LCT). With the proposed tuning method, the good constant current output characteristics under zero phase angle condition can be easily achieved with high design freedom. Besides, due to the good capability of the high-order harmonic suppression, the output current will be less likely to operate in discontinuous mode (DCM) comparing to the conventional LCL/LCL and LCC/LCC compensated topologies. And the fluctuation of the constant output current can be reduced. The basic analysis of the proposed method is given. The parameters design process is elaborated. Both simulation model and a 1kW experimental prototype are designed and built. The simulation results and the experimental results verify the good performance of the proposed method.