改进型自激谐振无线电能传输系统

doi:10.16183/j.cnki.jsjtu.2022.427

摘要/Abstract

摘要：

针对一种自激式谐振无线电能传输(WPT)系统的主功率管驱动能力弱、软开关性能差、开关损耗大等问题,通过分析谐振主电路工作原理,发现问题的根源是两个不可控二极管限制了主功率管驱动电阻值.采用全控型小功率开关管代替二极管提出一种改进型自激谐振电路,通过对电路4种工作模态的理论分析,证实改进型电路主功率管具有较强的驱动能力.为了进一步得到改进型系统的最优参数,综合考虑各参数容限值建立系统非线性规划模型,设计一种混合优化算法,得到系统全局最优解.利用系统仿真及实验样机进行对比验证,结果表明:改进型WPT系统软开关性能优良,开关管温度降低约7 ℃,效率提升约4%.

关键词: 无线电能传输系统, 自激谐振, 参数优化, 非线性规划, 遗传算法

Abstract:

Aimed at the main power tube with problems of weak driving ability, poor soft switching performance, and large switching loss in a self-excited resonant wireless power transmission (WPT) system, an analysis of the working principle of resonant main circuit is conducted, which indicates that the root cause of the problem is that two uncontrollable diodes limit the driving resistance of main power tube. Thereofre, an improved self-excited resonant circuit is proposed by using a fully controlled low power switch instead of the diode. The circuit theoretical analysis of four working modes suggests that the main power tube of the improved circuit has a stronger driving ability. To further obtain the optimal parameters of the improved system, a nonlinear programming model of the system is established by considering the tolerance limit of each parameter, and a hybrid optimization algorithm is designed to obtain the system global optimal solution. A comparison of the results of system simulation and experimental prototype shows that the improved WPT system has an excellent soft switching performance. The temperature of the switch tube is reduced by about 7 ℃, and the efficiency is increased by about 4%.

Key words: wireless power transmission (WPT) system, self-excited resonance, parameter optimization, non-linear programming, genetic algorithm (GA)

中图分类号:

TM724

赵志斌, 骆彬, 唐婷, 王春芳, 孙中华. 改进型自激谐振无线电能传输系统[J]. 上海交通大学学报, 2023, 57(7): 859-867.

ZHAO Zhibin, LUO Bin, TANG Ting, WANG Chunfang, SUN Zhonghua. Improved Self-Excited Resonant Wireless Power Transmission System[J]. Journal of Shanghai Jiao Tong University, 2023, 57(7): 859-867.

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范围	k	f₀/kHz	L_P/μH	L_S/μH	C_P/μF	C_S/μF
下届	0.1	20	10	10	0.1	0.1
上届	0.25	35	100	100	1	1

条件	I_i/A	I_LP/A	I_LS/A	U_CP/V	I_CP/A	U_CS/V
仿真	0.99	7.80	2.06	53.2	8.19	33.1
实验	1.1	8.1	1.9	55.1	8.1	30.2

R_O/Ω	5	7	10	20	40
f₀/kHz	34.1	34.3	34.7	34.4	34.4
U_O/V	18.5	18.9	19.6	19.8	20.1