新型无接触电能传输系统多负载解耦控制研究

利用无接触感应耦合电能传输系统互感数学模型,研究了多负载时系统的功率传输问题.提出了一种解耦控制策略,在能量拾取侧中增加一个Boost电路.在负载轻载时,以较低开关频率控制Boost电路中功率开关管的通断.当功率开关管关断时,系统向负载传输功率;当功率开关管导通时,系统屏蔽副边负载,实现原边线圈与副边线圈的解耦控制.针对系统有无Boost电路分别进行了PSpice仿真分析.理论分析与仿真结果表明,该控制方法能在多负载系统的单一负载轻载时实现副边线圈与原边线圈的电磁解耦,为多负载无接触感应耦合电能传输系统的稳定运行提供保障.

Research on the Decoupling Control of Contactless Power Transfer System with Multiple Loads

This paper investigated the power transmission of contactless inductive coupled power transfer system with multiple loads by utilizing its mutual inductance model.Adding a boost circuit to the pick up side,a decoupling control strategy was proposed.Power switch of boost circuit was switched on and off with low frequency for light load.Power was transferred to load while power switch was off.While power switch was on,the pick up coil was screened,and the decoupling between the first side and the secondary side was achieved.PSpice simulation was carried out separately with and without boost circuit.Theoretical analysis and simulation results showed that the strategy achieved electromagnetic decoupling between the first side and secondary side of multiple loads system for one or more light loads,and stable operation was ensured.