基于改进E类放大器的无线电能传输系统
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摘要
以改进E类放大器作为高频激励源建立完整的磁耦合谐振式无线电能传输(MCR-WPT)系统。根据改进E类放大器的工作原理建立微分方程,并计算出电路参数,结果表明与传统的E类放大器相比,在输出功率相同的情况下,器件需要承受的电压值降低了20%。然后进行仿真并成功实现了改进E类放大器,整个工作频域上效率均在80%以上。对整个无线充电系统建立起4线圈结构的传输系统模型,并分析传输距离对传输功率和效率的影响。最后搭建了完整的MCR-WPT系统,在20 cm远的距离上可以点亮9W的发光二极管(LED)灯泡,传输效率为61%,验证了放大器的有效性和模型的正确性。
An improved class E amplifier as source of magnetically-coupled resonant wireless power transfer(MCRWPT) system is used.Differential equations is established based on working principle of the improved class E amplifier and calculates the result.And the result shows that with the same output power,the voltage stress on switching device is 20%less.Then the improved class E amplifier is emulated and built up,and its efficiency is above 80%on the frequency band.Thirdly,four coil structure model of WPT system is built to analyze the effect of transmission distance on transmission power and efficiency.Finally,a MCR-WPT system,which can light a 9 W lighting emit diode(LED)light over 20 cm with 61%efficiency,is built up to verify the validity of amplifier and model.
An improved class E amplifier as source of magnetically-coupled resonant wireless power transfer(MCRWPT) system is used.Differential equations is established based on working principle of the improved class E amplifier and calculates the result.And the result shows that with the same output power,the voltage stress on switching device is 20%less.Then the improved class E amplifier is emulated and built up,and its efficiency is above 80%on the frequency band.Thirdly,four coil structure model of WPT system is built to analyze the effect of transmission distance on transmission power and efficiency.Finally,a MCR-WPT system,which can light a 9 W lighting emit diode(LED)light over 20 cm with 61%efficiency,is built up to verify the validity of amplifier and model.
引文
[1]赵争鸣,张艺明,陈凯楠.磁耦合谐振式无线电能传输技术新进展[J].中国电机工程学报,2013.33(3):1-13.
[2]宋俊霖,刘宜成.面向便携式电子设备的无线电能传输研究[J].电力电子技术,2014,48(10):64-66.
[3]Suetsugu,Tadashi.Analysis&Design of Class E Amplifier With Shunt Capacitance Nonlinear and Linear Capacitance[J].Circuits and Systems,2004,51(7):1261-1268.
[2]宋俊霖,刘宜成.面向便携式电子设备的无线电能传输研究[J].电力电子技术,2014,48(10):64-66.
[3]Suetsugu,Tadashi.Analysis&Design of Class E Amplifier With Shunt Capacitance Nonlinear and Linear Capacitance[J].Circuits and Systems,2004,51(7):1261-1268.