新型恒定一次侧电流无接触电能传输系统的建模与优化(英文)

Modeling and Optimizing of a New Contactless ICPT System With Constant Primary Winding Current

提出一种新型无接触式感应耦合电能传输系统(inductively coupled power transfer,ICPT),系统一次侧线圈与电感/电容/电容所组成的谐振槽谐振、二次侧线圈与补偿电容并联谐振。利用互感理论,分别建立相互分离的原边等效电路模型和负载等效电路模型,采用正弦交流分析法对其等效电路模型进行分析,获得谐振槽电容及电感元件的参数计算公式,导出系统向负载传输功率及输出电压的计算表达式,并对谐振槽元件参数进行优化设计,以便减小装置体积,降低成本。额定频率下系统一次侧线圈电流保持恒定而与负载大小无关,保证电能由电源向负载的稳定传输。同时谐振槽输入电流随负载的减小而减小,提高系统的部分负载能效值。PSpice仿真实验验证该系统的上述优点。

A new contactless inductively coupled power transfer （ICPT） system was proposed in this paper. The primary coil was tuned with an inductor/capacitor/capacitor （LCC） resonant tank, and the second coil was parallel tuned with a compensation capacitor. Based the pick-up load equivalent equivalent model were derived on mutual inductance theorem, model and primary circuit separately. With sinusoidal AC analysis, closed-form expressions of circuit elements in the resonant tank were deduced and equations about output power and voltage were derived too. The LCC resonant tank elements were optimized in the design for minimizing the size and lowering the cost. Constant primary winding current independent of load level is inherent in the proposed system so that power could be transmitted from power source to load in a stable manner, Superior part-load efficiency is another virtue in the proposed system, for the input current of the resonant tank is decreased with the decrescence of load. PSpice simulations are provided to illustrate the superiority of the proposed system.