全数字无线电能传输频率跟踪控制方法  

All-digital wireless power transmission frequency tracking control method

作　　者：张欣[1] 倪豪 褚志齐 李方洲 李春智 ZHANG Xin;NI Hao;CHU Zhi-qi;LI Fang-zhou;LI Chun-zhi(Tianjin Key Laboratory of Electrical Equipment Intelligent Control,Tiangong University,Tianjin 300384,China)

机构地区：[1]天津工业大学天津市电气装备智能控制重点实验室,天津300387

出　　处：《电机与控制学报》2022年第2期131-141,共11页Electric Machines and Control

基　　金：国家自然科学基金(51577131,52077153);天津市自然科学基金(20JCYBJC00190);天津市研究生科研创新项目(2020YJSS001)。

摘　　要：针对无线电能传输过程中传输功率和传输效率问题,考虑到频率失谐控制策略,通过分析全数字锁相环的结构和数学模型,改进了传统的全数字锁相环,基于FPGA设计一种具有动态分频和动态时滞功能的自适应模值全数字锁相环,并提出一种全数字频率跟踪控制方法。为保证系统工作效率,设计的全数字锁相环可以对系统阻抗角进行控制,使系统在不同工况下都呈弱感性,确保了功率开关管工作在ZVS软开关状态。利用FPGA实现了电压电流频率和相位跟踪,搭建了一台输出功率1 kW,工作频率和阻抗角可调的实验样机,验证了理论分析的正确性。仿真和实验结果表明,该方法显著提高了无线电能传输功率和传输效率,提升了系统工作的稳定性。Aiming at the problems of transmitted power and transmission efficiency in the process of wireless energy transmission and considering the frequency detuning control strategy,the traditional all digital phase locked loop is improved by analyzing the structure and mathematical model of the all digital phase locked loop,and an adaptive mode valued all digital phase locked loop with dynamic frequency division and dynamic time lag is designed based on FPGA.To ensure the efficiency of the system,the designed all digital phase locked loop can control the impedance angle of the system,which makes the system weakly inductive under different operating conditions and ensures that the power switching tubes operate in ZVS soft switching state.The voltage and current frequency and phase tracking were realized by FPGA,and an experimental prototype with 1 kW output power and adjustable operating frequency and impedance angle was built to verify the correctness of the theoretical analysis.The simulation and experimental results show that the method significantly improves the wireless energy transmission power and transmission efficiency,and enhances the stability of the system operation.

关 键 词：感应耦合无线电能传输 频率跟踪 全数字锁相环 传输效率 弱感性 ZVS 

分 类 号：TM724[电气工程—电力系统及自动化]