摘要
对于高频高功率两级结构的DC/DC电源系统,其轻载效率和重载效率差异较大,整体效率低。因此,提出了一种基于遗传算法和PID的联合控制的方法,通过优化两级电源系统的控制参数,如相移和死区时间,从而优化整体电源系统效率。该方法可以在不同负载条件下,自适应地优化其相移和死区时间等参数,直到得到可实现的最大效率值,并实现每种负载下的最优控制参数。通过搭建MATLAB-simulink仿真平台,仿真了1MHz,425V/24V,1440W的两级DC/DC变换器的效率优化结果。该控制方法使级联变换器平均效率提高了1.5%以上,为实际工程中的应用提出了一种新的可能性。
For the high frequency and high power two-stage DC/DC power supply system,the light load efficiency and heavy load efficiency are different,and the overall efficiency is low. Therefore,a joint control method based on genetic algorithm and PID is proposed to optimize the overall power system efficiency by optimizing the control parameters of the twolevel power system,such as phase shift and dead zone time. Under different load conditions,this method can optimize the phase shift and dead zone time,until the maximum efficiency value can be achieved,and the optimal control parameters under each load can be realized. The simulation efficiency optimization results of the two stage DC/DC converters of 1 MHz,425 V/24 V and 1,440 W are simulated by constructing the MATLAB-simulink simulation platform. The control method improves the average efficiency of the cascade converter by more than 1.5 %,which brings forward a new possibility for practical application.
作者
吴媛
钱钦松
孙伟锋
WU Yuan;QIAN Qin-song;SUN Wei-feng(National ASIC Centre in Southeast University,Nangjing 210096,China)
出处
《通信电源技术》
2019年第6期58-62,共5页
Telecom Power Technology
