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在大部分的感应耦合式无线能量传输系统中,为了产生一定频率的谐振电流,逆变器拓扑的开关管工作频率必须与谐振频率相同.但采用高频率高品质因数的谐振网络会使得逆变器开关损耗增加,进而导致系统整体传输效率下降.提出一种脉冲注入型感应耦合式无线能量传输系统拓扑,不仅使得开关频率能够远低于谐振频率,并且将注入能量的大小与开关频率、谐振网络以及负载状况彻底解耦,完全实现离散能量注入功能.在提出的拓扑基础上,叙述了电路的工作模态,建立了描述系统状态变化的微分方程模型,并给出了电路关键参数的设计原则.通过仿真和实验,验证了所提拓扑的可行性和有效性.“,”For most of the inductive power transfer systems,due to the requirement of the resonance current with a certain frequency,the working frequency of inverters needs to be equal to the resonant frequency.However,a high-frequency and high-Q resonant tank may increase the switching loss of inverters,which may cause the decrease of power transfer efficiency for the whole system.This paper proposes a pulse energy injection inverter for inductive power transfer system s,which enables the working frequency of inverter much lower than the resonant frequency.Moreover,the proposed inverter also decouples the energy injection with the working frequency,the resonant tank,and the load to realize the discrete energy injection.Based on the proposed inverter,this paper offers the working modes and a differential equation model to describe the system states.Then some key principles for parameter tuning of this inverter are provided.Through simulations and experiments,it is proved that the proposed inverter is available and effective for inductive power transfer systems.