非接触电能传输的效率及频率分叉现象研究

非接触感应电能传输方式可广泛应用于医疗、石油、矿山、水下设备、军事等领域，有着十分广阔的前景。基于电磁耦合技术和电力电子技术的非接触感应电能传输系统，通过采用一、二次侧可分离的变压器，将电能从电源侧经气隙传递给一个或多个负载，避免了电能传输过程中的裸露导体和接触火花。传输效率是非接触电能传输系统研究的一个热点，本文通过理论分析和公式推导，详细论述了串联谐振逆变器二次侧并联补偿电容对系统效率的影响，提出了最佳并联补偿电容选择方案。同时对不同并联补偿电容变化时的谐振频率分叉现象进行了研究，实验证明基于这种方法选择的并联补偿电容能使系统传输效率显著增大。

STUDY ON THE FREQUENCY BIFURACTING PHENOMENON OF A CONTACT-LESS POWER TRANSMISSION SYSTEM

A contact-less power transmission system is applied widely in many fields, such as medical treatment, petroleum, mine, underwater equipments and military affairs, and have a very extensively future. The powder transmitting system based on the contact-less power transmission of the electromagnetic coupling technology and power electronics, which use the transformer whose primary and secondary side are both detachable and avoids the phenomenon of the exposed conductor and spark which appears in the power transmitting procedure transmits the power from the main side to single load or multiple-load. The transmission efficiency is one of the system research focuses. This paper particularly discusses the affection of the parallel compensate capacitor in the secondary side of series resonance converter to system efficiency by theoretical analysis and formulation deduction, and brings forward the optimum project of shunt compensate capacitor. Meanwhile this paper does study the Frequency Bifurcating Phenomenon with the changes of different shunt compensate capacitor, the experiment proves that the shunt compensate capacitor chosen in this method will greatly increase the system transmission efficiency.