采用非接触电流相位互感器的自激式非接触谐振变换器  

Self-oscillating Contactless Resonant Converter With Phase Detection Contactless Current Transformer

作　　者：严开沁[1] 陈乾宏[1] 侯佳[1] 任小永[1] 曹玲玲[1] 阮新波[1] 

机构地区：[1]江苏省新能源发电与电能变换重点实验室(南京航空航天大学),江苏省南京市210016

出　　处：《中国电机工程学报》2014年第24期3991-3999,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51077069);江苏省自然科学基金项目(BK2009372);高等学校博士学科点专项科研基金(20103218110013)~~

摘　　要：自激控制方法由于控制方法简单、对系统参数变化响应速度快,在非接触供电系统中存在广阔的应用前景。该文由完全补偿条件下非接触变换器中逆变器电压与副边电流同相的特殊关系,引入转移阻抗的概念,分析并提出适用于串/串补偿非接触谐振变换器的自激控制方法。为在变换器原边实现副边电流相位的检测,保证变参数条件下检测的准确性和快速性,提出测试绕组短路的非接触电流相位互感器。此外,为保证自激控制的准确,对非接触电流相位互感器及控制回路中寄生参数造成的相位延迟进行分析和补偿。最后,制作完成一台60 W的采用非接触电流相位互感器的自激式非接触谐振变换器。实验结果表明,非接触电流相位互感器能够准确检测副边电流相位并反馈至原边,自激控制方法则可以通过检测副边电流过零点控制逆变器开关管,使得变换器在变参数条件下自动工作在电压增益恒定的频率点。设计的动态实验也证明了所述自激控制方法能在一周期内响应变换器参数变化。Owing to the simplicity and rapidly response, self-oscillating control strategy is of great potential in contactless power transmission. Considering the characteristics of a fully compensated contactless resonant converter （CRC）, the conception of transfer impedance was introduced, and a self-oscillating control strategy was proposed for serial/serial （S/S） compensated CRC. To provide passive current phase detection solution for self-oscillating contactless resonant converter （SOCRC）, a secondary winding shorted current transformer, called phase detection contactless current transformer （PDCCT） was proposed. Moreover, the time delay in both PDCCT and control circuitry were studied and compensated. Finally, a 60W SOCRC with PDCCT was fabricated. The experimental results verify that the proposed PDCCT can detect the secondary current and feedback to the primary side accurately. And with self-oscillating control strategy, which offers the driver signals for the inverter by detecting secondary current phase, constant voltage gain can be achieved. A dynamic test circuit is also designed and the experimental results show that SOCRC can response to parameter changes in a switching period.

关 键 词：非接触电能传输 串 串补偿 自激控制 非接触电流相位互感器 动态响应 

分 类 号：TM46[电气工程—电器]