摘要
设计了一种耦合电感的循环级联方法来实现多相逆变之间的电流平衡,并分析了耦合电感参数对系统性能的影响;对多相并联下系统主要的功率损耗进行了分析,以解释在大输出电流条件下多相系统具有较低损耗的原因,开发了6相D类半桥逆变并联的原型机对系统性能进行验证。实验表明该方法能够将相间电流不平衡控制在较好的范围之内。使用2个外边长90 cm×70 cm的4圈的平面矩形螺旋线圈,在距离20 cm时进行无线电能传输。当接收端整流桥后的6.87Ω负载上获得15 k W的功率时,测得发送端直流输入到接收端直流负载的DC-DC效率为94.7%。
To balance the currents between multiphase inverters,a cyclic cascade method of coupled inductors is proposed,and the influences of coupled inductor parameters on system performances are analyzed.Main power loss components are analyzed,and the reason why multiphase systems with high output current have low loss is illustrated.Meanwhile,a prototype with 6-phase half-bridge parallel inverters is developed.Experimental results show that the proposed topology can suppress the unbalance current to a low level.Two 4-turns planar sinusoid rectangular coils,whose outer dimension is 90 cm×70 cm,are employed to transfer wireless power at the distance of 20 cm.When the receiving power of the 6.87 Ωload after the rectifier-bridge is 15 kW,the DC-DC efficiency of DC load is up to 94.7 %.
出处
《电力自动化设备》
EI
CSCD
北大核心
2017年第11期194-200,共7页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51677139)
国家科技支撑计划项目(2015BAG07B00)~~
关键词
无线电能传输
半桥逆变器
多相并联
损耗模型
不平衡电流
wireless power transfer
half-bridge inverter
multiphase parallel
power loss model
unbalanced current
