用于感应式非接触励磁系统的CLC补偿拓扑研究

Research on CLC compensation topology for inductive contactless excitation system

在感应式非接触电能传输(ICPT)系统中,为了解决负载变化影响电路输出电流以及输入阻抗角的问题,提出一种新型的T型结构的CLC补偿拓扑,并将其与串联补偿组合形成CLC-串联型补偿结构。依据基尔霍夫定律分析了CLC补偿同时实现全负载变化范围内的输出恒流特性和零输入相位角(ZPA)特性的约束条件;推导出了针对上述约束条件的谐振网络参数设计方法;分析了系统的频率稳定性,并求出了使系统频率稳定的负载边界条件;定量地讨论了使逆变桥开关管实现零电压开关(ZVS)的谐振参数调整方法。仿真和实验结果验证了CLC补偿电路具有恒流特性和ZPA特性;当负载电阻值小于使系统稳定的负载边界值时,系统可以保持频率稳定;单独调节补偿电容容值C 1可以实现逆变器开关管的ZVS。

In inductive contactless power transfer system,a T-type CLC compensation structure is proposed to solve the problem of load variation affecting output current and input impedance angle of circuit.A CLC-S compensation structure was formed by combining CLC compensation and series compensation structures.The constraint conditions of output constant current characteristic and zero phase angle(ZPA)characteristic of CLC compensation in the full load range were analyzed according to Kirchhoff’s Law.The design method of resonant network parameters for the above constraint conditions was deduced.The frequency stability of the system and the load boundary conditions for the frequency stability of the system were obtained.The resonant parameters adjustment method for realizing zero voltage switching(ZVS)was discussed.The simulation and experimental results verify that the CLC compensation circuit has the characteristics of constant current and ZPA;when the load resistance value is less than the load boundary value which makes the system stable,the system can keep the frequency stable;the ZVS of the inverter switch can be realized by adjusting capacitance C 1 separately。