High-Efficiency Contactless Power Transfer System for Electric Vehicle Battery Charging Application
High-Efficiency Contactless Power Transfer System for Electric Vehicle Battery Charging Application
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DOI：
10.1109/jestpe.2014.2339279
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发表时间：
2015-03
影响因子：
5.5
通讯作者：
Cong Zheng;J. Lai;Rui Chen;William Eric Faraci;Zaka Ullah Zahid;Bin Gu;Lanhua Zhang;G. Lisi
中科院分区：
文献类型：
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作者：
Cong Zheng;J. Lai;Rui Chen;William Eric Faraci;Zaka Ullah Zahid;Bin Gu;Lanhua Zhang;G. Lisi
提出了一种用于电动汽车电池的非接触式充电系统。该系统由三部分组成：1)高频电源来自调频全桥逆变器；2)在初级和次级绕组均采用串联谐振电容器的松耦合变压器；3)整流输出电路，采用全桥二极管整流器。通过精心选择的补偿网络参数，可以确保电动汽车电池充电过程中所有初级开关的零电压开关，从而允许使用低导通状态电阻功率mosfet实现高频操作和系统效率。利用有限元分析软件对松耦合变压器的设计进行了仿真验证。对于4kw硬件样机，在4 cm气隙和8 cm气隙条件下，dc-dc效率峰值分别达到98%和96.6%。在电子负载和自制电动汽车上对样机进行了测试，验证了恒流和恒压控制及其转换的性能。
In this paper, a contactless charging system for an electric vehicle (EV) battery is proposed. The system consists of three parts: 1) a high-frequency power supply from a full-bridge inverter with frequency modulation; 2) a loosely coupled transformer that utilizes series resonant capacitors for both the primary and secondary windings; and 3) a rectification output circuit that uses a full-bridge diode rectifier. With carefully selected compensation network parameters, zero-voltage switching can be ensured for all the primary switches within the full range of an EV battery charging procedure, which allows the use of low ON-state resistance power MOSFETs to achieve high-frequency operation and system efficiency. The design of loosely coupled transformer is simulated and verified by finite element analysis software. For a 4-kW hardware prototype, the peak dc-dc efficiency reaches 98% and 96.6% under 4- and 8-cm air gap conditions, respectively. The prototype was tested with an electronic load and a home-modified EV to verify the performance of constant current and constant voltage control and their transitions.