摘要
在无线电能传输(WPT)系统中,松耦合变压器的耦合系数直接影响能量的传输效率,为提高变压器耦合系数,对一种绕组混合绕制的非接触变压器进行2D磁场仿真,基于磁场仿真结果,给出该混合绕制松耦合变压器的磁路模型。根据磁力线分布,对初、次级磁通进行区域划分,给出各区域磁阻及耦合系数的量化计算方法。以磁阻及耦合系数表达式作为结构优化依据,提出优化结构。采用优化后的结构,设计了30 V输入、90 W输出的WPT系统,结果表明优化后的绕组混合绕制变压器结构的耦合系数得到增加且传输性能得到有效提升。
In the wireless power transmission(WPT)system,the coupling coefficient of loosely coupled transformer directly affects the energy transmission efficiency.In order to improve the coupling coefficient of the transformer,a 2 D magnetic field simulation is carried out for a kind of contactless transformer with winding hybrid wound.Based on the magnetic field simulation results,the magnetic circuit model of the winding hybrid wound loosely coupled transformer is given.According to the distribution of magnetic field lines,the primary and secondary magnetic flux are divided into several regions,and the quantitative calculation method of the regional magnetic resistance and coupling coefficient is given.According to the expression of magnetic resistance and coupling coefficient,the structure is optimized.Using the optimized structure,an energy transmission system with 30 V input,90 W output is designed.The result shows that the coupling coefficient of the optimized structure is increased and the transmission performance is effectively improved.
作者
王莹莹
周玉斐
刘帅
任家琪
WANG Ying-ying;ZHOU Yu-fei;LIU Shuai;REN Jia-qi(Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)
出处
《电力电子技术》
CSCD
北大核心
2021年第7期30-34,共5页
Power Electronics
基金
中国博士后科学基金(2015M580424)。
关键词
松耦合变压器
混合绕制
磁路模型
耦合系数
loosely coupled transformer
hybrid wound
magnetic circuit model
coupling coefficient
