【摘要】 为了解决感应式无线电能传输(inductive power transmission,IPT)系统容易失谐及功率难控制的问题,提出一种将能量传输过程分为能量注入和自由谐振两种工作模式的变换器拓扑结构,实现电源与谐振网络解耦,避免了电源对系统注入能量的节拍受谐振频率的约束,解决了频率跟踪难和系统失谐的问题.同时在能量注入的工作模式下,提出一种基于模态时间调节的输出功率控制方法.通过调节能量注入时间对输出功率进行控制,实现输出功率控制不受谐振网络的影响,解决了IPT系统输出功率控制难的问题.仿真和实验证明:所提出变换器工作具有合理性和可实现性;输出功率与耦合系数及负载相关性小,可通过控制能量注入时间的长短,独立地对输出功率进行控制.更多还原

【Abstract】 To solve problems of inductive power transmission(IPT) system,such as easy detuning and difficult power control,we propose a converter topology that divides the energy transfer process into two modes of operation including energy injection and free resonance.In this way,the power supply can be decoupled from the resonant network and the rhythm of injected energy is not constrained by the resonant frequency.In the proposed topology,problems of difficult frequency tracking and system detuning are also solved.At the same time,in the working mode of energy injection,an output power control method based on modal time adjustment is proposed.By adjusting the energy injection time to control the output power,the output power control is not affected by the resonant network,and the problem of difficult output power control of the IPT system is solved.The rationality and achievability of the proposed converter are proved by simulations and experiments.The output power is hardly correlated with the coupling coefficient and loads,and the output power can be independently controlled by maneuvering the length of the energy injection time.更多还原