摘要
E类功率放大器和E类全波整流器具有软开关特性且拓扑结构简单的特点,广泛应用于兆赫兹感应式无线电能传输系统中。传统的E类变换器在宽负载条件下不能维持软开关性能,使得系统传输效率下降。针对此问题,建立了考虑线圈内阻的LCC-S型补偿网络的数学模型,分析了E类全波整流器二极管并联电容的大小在宽负载条件下对其输入阻抗的影响,在保证E类全波整流器功率输出能力条件下,以系统传输效率为优化目标,采用遗传算法对发射侧补偿电容和接收侧补偿电容以及E类全波整流器二极管的并联电容进行优化设计。为验证设计方法的有效性,在ADS中搭建了精准仿真模型,仿真结果表明,在10~100Ω负载范围内系统传输效率维持在84%以上,最大输出功率达到45 W,为兆赫兹感应式无线电能传输系统在宽负载变化下仍能保持高传输效率提供了一种实用的设计方法。
The class E power amplifier(PA) and class E rectifier are widely used in MHz inductive wireless power transfer(WPT) system due to their soft-switching characteristics and simple topology. The traditional Class E2 DCDC converter cannot maintain the soft-switching performance under wide load variation, which reduces the system transfer efficiency. Accordingly, a mathematical model of the LCC-S compensation network considering the internal resistance of the coil is established, and the influence of the shunt diodes capacitor on the input impedance of class E full-wave rectifiers is analyzed under wide load conditions. The compensation capacitors and the diode parallel capacitors are optimized respectively by the genetic algorithm under the condition of ensuring the power output capability of the class E full-wave rectifier. In order to verify the effectiveness of the design method, an accurate simulation model is built in ADS. The system transfer efficiency is above 84% with the maximum output power of 45 W in the 10~100 Ω load range. A practical design method is provided for the MHz inductive wireless power transfer system to maintain high transfer efficiency under wide load variation.
作者
朱学贵
齐东阳
周阳
余文超
ZHU Xuegui;QI Dongyang;ZHOU Yang;YU Wenchao(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)
出处
《电气应用》
2022年第10期67-75,共9页
Electrotechnical Application
基金
重庆市教委科学技术研究项目(KJZDK202100102)。
关键词
无线电能传输
E类全波整流器
宽负载变化
补偿电容优化
wireless power transfer(WPT)
class E full-wave rectifier
wide load variation
compensation capacitor optimization
