摘要
为使不同阻值的负载在充电时都能维持较高效率,提出在负载端接入双管buck-boost变换器,通过调节变换器占空比使等效负载阻值始终等于系统最优负载阻值,实现最大效率追踪。同时设定期望输出功率,根据不同的负载阻值计算出对应的输出电压并给到控制器作为参考电压,通过闭环移相控制调节逆变器的移相角,稳定地输出对应电压,从而实现恒功率控制。仿真结果表明,当负载阻值在10~40Ω变化时,系统传输效率均能维持在85%且稳定输出4 200 W的功率。
In order to maintain high transmission efficiency when different loads are being charged, a dual-switch buck-boost conventer is proposed at the load end. By adjusting the duty cycle of the converter, the equivalent load resistance can be always equal to the optimal load resistance to achieve maximum efficiency. And the expected output power value is set, the corresponding output voltage according to different load resistance is calculated sending to the controller as a reference voltage, the phase shift angle of the inverter is adjusted through closed-loop phase shift control, and output the corresponding voltage stably realizing constant power control.The simulation shows that the transmission efficiency remains constant at 85% and the output power remains constant at 4 200 W when the load resistance varys between 10~40 Ω.
作者
付光杰
毛远志
FU Guangjie;MAO Yuanzhi(School of Electrical Information and Engineering,Northeast Petroleum University,Daqing 163318,China)
出处
《吉林大学学报（信息科学版）》
CAS
2022年第5期727-733,共7页
Journal of Jilin University（Information Science Edition）
基金
国家自然科学基金资助项目(51474069)。
