谐振式无线电能传输系统恒功率输出特性研究  

Constant power output characteristics of resonant wireless power transmission system

作　　者：魏金成 廖师师 邱晓初 雷洪成 罗乐 谢邱虹 WEI Jincheng;LIAO Shishi;QIU Xiaochu;LEI Hongcheng;LUO Le;XIE Qiuhong(College of Electrical and Electronic Information,Xihua University,Chengdu 610039,China)

机构地区：[1]西华大学电气与电子信息学院,四川成都610039

出　　处：《电力工程技术》2022年第3期231-236,共6页Electric Power Engineering Technology

基　　金：四川省重点研发计划资助项目(2021YFG0204)。

摘　　要：在无线充电过程中,电池阻值的变化会引起输出功率的波动,从而减短电池寿命,影响充电安全。针对磁耦合谐振式无线电能传输变负载系统,通常是在接收端加入控制电路使输出功率稳定,但这增加了用电设备的体积。因此,文中提出了基于反射阻抗原理的2种恒功率控制策略:Sepic电路恒功率输出控制策略和移相控制恒功率输出控制策略。首先分析了负载电阻对输出功率的影响;然后分别推导了Sepic电路驱动信号的占空比、移相控制中驱动信号的移相角与输出功率的关系,给出了恒功率控制策略的原理;最后通过Matlab/Simulink搭建仿真模型,验证了文中理论分析及所提控制策略的正确性。仿真结果表明,2种控制策略均能有效实现恒功率输出。In the process of wireless charging,the fluctuation of output power is caused by the change of battery resistance,which shortens the battery life and affects the safety of charging.For the magnetic coupling resonance type wireless power transmission variable load system,the control circuit is usually added at the receiving end to stabilize the output power,but it expands the volume of the electrical equipment.Therefore,two constant power control strategies based on the principle of reflected impedance are proposed in the article,namely Sepic circuit constant power output control strategy and phase shift control constant power output control strategy.Firstly,the influence of load resistance on the output power is analyzed.Secondly,the relationship between the duty cycle of the Sepic circuit drive signal and the output power,and the relationship between the phase shift angle of the drive signal and the output power in the phase shift control are deduced respectively.The principle of the constant power control strategy in the article is given.Finally,a simulation model is built through Matlab/Simulink to verify the correctness of the theoretical analysis and the proposed control strategies.The simulation results show that both control strategies can effectively achieve constant power output.

关 键 词：磁耦合谐振 无线电能传输 恒功率 Sepic电路 移相控制 移相角 

分 类 号：TM724[电气工程—电力系统及自动化]