计及系统性能提升的谐振式无线充电开关器件死区优化
Dead Time Optimization for Switching Device of Resonant Wireless Charging System Considering Performance Enhancement
-
摘要: 针对双边LCC谐振式无线充电的逆变器金属氧化物半导体场效应晶体管(MOSFET)死区时间设置影响传输功率及效率的问题,提出了一种适用于其拓扑结构的死区优化设计方法。首先建立了双边LCC谐振式无线充电系统的数学描述,并简述其运行模态,推导出次级侧补偿电容与输入感性阻抗的量化规律。然后据此提出了一种死区时间优化设计方法,以实现与无线充电系统特性密切相关的逆变器软开关。最后,搭建了一套实验平台,实验结果表明,此优化设计方法可确保逆变器运行完全实现软开关,提高了无线电能传输功率及效率。Abstract: Aiming at the influence of dead time setting on transfer power rating and efficiency of the inverter of double-sided LCC resonant wireless charging transfer（WPT）system,a dead time optimization method for metal-oxide-semiconductor field effect transistor（MOSFET）soft switching is proposed.First,the mathematical description of the double-sided LCC resonant wireless charging system is established,and the operating mode is briefly analyzed as well.The quantitative characteristic is deduced that the secondary side compensation capacitor can be adjusted to ensure that the circuit is inductive.And a dead time optimization design method is proposed to realize zero voltage switching（ZVS）of the inverter that is closely related to the performance of the WPT system.Finally,aprototype is built.The experimental results verify that dead time calculated by this optimized method can ensure the soft switching of the inverter MOSFET,and promote the wireless power transmission power and efficiency.
下载:
