摘要
为提高松耦合感应电能传输系统的传输能力,对系统的核心部件——分离式变压器的结构特点及参数进行研究。在分析松耦合变压器的互感等效电路模型的基础上,对电路的开路输出电压、励磁电流等变量进行分析,建立其与自感系数、互感系数、耦合系数等结构参数的关系,并分析了电路的阻抗特性与传输效率。通过仿真与实验,研究了系统的变量与磁芯间隙、系统频率之间的关系。为提高分离式变压器的耦合系数,对3种磁芯线圈结构进行参数测量,获得变压器的最优结构。仿真与实验结果表明,磁芯间隙不仅降低了线圈的耦合系数,且降低了励磁电感,需通过提高系统工作频率来抑制励磁电流,提高系统传输效率;通过优化磁芯线圈结构及磁芯间隙可提高系统传输能力和稳定性。
To improve the transmission capability of IPT（Inductive Power Transmission） system,the structure and parameters of separated transformer ,the key part of system, are investigated. Based on the analysis of its equivalent mutual circuit model ,some of its variables, such as open- circuit output voltage and magnetizing current,are explored. Its relationship with the structural parameters is established,such as self-inductance,mutual inductance and coupling coefficient. Its impedance characteristic and transmission efficiency are analyzed. The relationships among system variable ,magnetic core gap and system frequency are researched by simulation and experiment. To improve the coupling coefficient of separated trans- former,the structural parameters are measured for three kinds of magnetic core windings to obtain the optimal structure. Results of experiment and simulation show that,the core gap decreases both the magnetizing inductance and the coupling coefficient. The operating frequency should be increased to limit the magnetizing current and improve the transmission efficiency. The system capability and stabi- lity can be improved by optimizing the magnetic core winding structure and the core gap.
出处
《电力自动化设备》
EI
CSCD
北大核心
2009年第9期141-144,共4页
Electric Power Automation Equipment
基金
国家自然科学基金重点资助项目(50575157)~~
关键词
感应电能传输
电磁感应
分离式变压器
耦合系数
励磁电感
inductive power transfer
electromagnetic induction
separated transformer
coupling coefficient
magnetizing inductance
