新型无接触电能传输系统的稳定性分析

建立了无接触电磁耦合结构的互感模型，对新型无接触电能传输系统引入了初级电源端口的等效负载阻抗及零相角谐振频率的概念，并对新型无接触电能传输系统采用各种初、次级补偿拓扑所带来的频率控制问题进行了深入的研究，经研究得知：为了使输出功率达到最大，初级零相角谐振频率须等于次级谐振频率；要保证系统的稳定、高效运行，零相角谐振频率必须是唯一的。文中还通过次级品质因数与无接触电磁结构的耦合系数给出了系统的稳定运行边界条件。仿真研究表明：当次级谐振回路的品质因数满足由电磁结构耦合系数所决定的表达式时，就可以保证系统稳定、高效地运行。

STABILITY ANALYSIS OF THE NEW CONTACTLESS POWER DELIVERY SYSTEM

Mutual inductance model of the contactless electromagnetic structure has been established. Deep investigation has been done about the frequency control problems in the system with different compensation topology by introducing the equivalent load impedance and zero phase resonant frequency. To make the output power the maximum, the zero phase frequency must be equal to the secondary resonant frequency and it must be exclusive to guarantee the stable and efficient operation of the system. The stable operation boundary conditions of the system have been given by the secondary quality factor, and the coupling coefficient, which is determined only by the geometrical structure and performance parameters of the magnetic structure. The simulation results show when the secondary quality factor meets the expression determined by the coupling coefficient, the system can operate stably and efficiently.