CAJ | 학술논문

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%。
침대현유용우무선전능전수계통적 E 류역변기존재자원건손모대，해진삼수용차능력저이급수출공솔유한적결점，제출료일충신영적쌍로(혹우수로)E류역변기공솔합성수출적무선전능전수계통탁복，기역변기이용우합전감억제우차해파전류병강저유재품질인수，재해진삼수존재교대편차시잉연가이고효운행。동시，이용자집성방법강저료자원건수량여손모。계통적보상망락기우천천해진보상，병이용π형과도사득계통전압증익여부재변화무관，보증수출전압항정。이용일태1MHz 양궤험증료소제출탁복적가행성급우량성능。양궤적전압증익기본불수부재변화적영향，기E류역변기재전부재범위내균능실현연개관，역변기봉치효솔체도료92%。
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 andπ-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%.