摘要
针对现有用于无线电能传输系统的E类逆变器存在磁元件损耗大,谐振参数容差能力低以及输出功率有限的缺点,提出了一种新颖的双路(或偶数路)E类逆变器功率合成输出的无线电能传输系统拓扑,其逆变器利用耦合电感抑制偶次谐波电流并降低有载品质因数,在谐振参数存在较大偏差时仍然可以高效运行。同时,利用磁集成方法降低了磁元件数量与损耗。系统的补偿网络基于串串谐振补偿,并利用π型跨导使得系统电压增益与负载变化无关,保证输出电压恒定。利用一台1MHz样机验证了所提出拓扑的可行性及优良性能。样机的电压增益基本不受负载变化的影响,其E类逆变器在全负载范围内均能实现软开关,逆变器峰值效率达到了92%。
For the problems with traditional class E inverters, such as higher inductor losses, more sensitive to the resonant parameters and lower power limitation, a novel topology with dual（or even） class E inverters and power combination for wireless power transfer（WPT） applications was proposed. Coupled inductors were proposed to suppress the even-order harmonics currents and reduce loaded quality factor, so that the inverters can still work normally and high efficiently even with large deviations of resonant parameters. And magnetic integration of coupled inductors was proposed to reduce the numbers and losses of the magnetics. Series-series resonance compensation scheme was used for WPT system and π-type（CLC） transconductance was used to ensure the constant output voltage and independence of voltage gain to the loads. A prototype with 1MHz operation frequency was designed and built to verify the feasibility and high performances of the proposed topology and to show that the voltage gain characteristics are independent with the loads and soft switching could be achieved at whole load ranges. The peak efficiency of the inverter reaches 92%.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第21期5577-5584,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51407032)
福建省教育厅科研项目(JA14046)
福州大学科技发展基金(2013-XY-3)~~
关键词
无线电能传输
E类逆变器
有载品质因数
谐振耦合
耦合电感
wireless power transfer（WPT）
class E inverter
loaded quality factor
resonant coupling
coupling inductor
