摘要
提出1种并联型开关线性复合结构的半导体激光器(laser diode,LD)驱动电源及其相应的控制策略。由于激光能量传输系统中LD驱动电源一般采用线性电源来满足其对输入电流低纹波的要求,而在大功率能量传输的场合,线性电源效率较低,限制了激光传能系统的发展和应用,故用高效率的开关电源代替传统的线性电源作为驱动电源。为补偿开关电源的输出电流纹波,采用高线性度的线性放大器与开关电源并联来抑制电源的输出电流纹波。为保证电源效率,开关电源采样线性放大器的输出电流并将其限制在0附近波动,以此提供绝大部分的负载功率。为保证电源输出电流的低纹波,线性放大器直接采样电源的输出电流来抑制开关电流纹波。此外,为实现良好的补偿效果,还对其电流环路进行了理论分析和设计。最后搭建了1台原理样机,通过实验使得电源的输出电流纹波减少了95%,为输出电流的1.2%。
In this paper,a switch-linear hybrid LD power supply with low current ripple is proposed.The high power laser diode（LD）is employed in the high intensity laser power beaming（HILPB）system.Normally,the tranditional linear power supply is used to power the LD for its characteristic of low current ripple.However,the efficiency of the linear power supply is quite low,which limit the perfermance of an employed HILPB system in the high power wireless power tranfer field.The buck converter,with current controlled feature,provides the most part of the load power.The linear amplifer,which controls the output current of the LD power supply,tracks the current ripple of the buck converter.To effectively eliminate the current ripple,the current loop of the linear amplifer is theoretical analyzed and designed.At last,aprototype,with 95%current ripple reduced,is built in the lab.The experimental results verify the theoretical analysis and the feasibility of the method.
出处
《中国科技论文》
北大核心
2017年第11期1252-1256,共5页
China Sciencepaper
基金
国家自然科学基金资助项目(51377080)
江苏省自然科学基金杰出青年基金资助项目(BK20130036)
高等学校博士学科点专项科研基金资助项目(133218110015)
江苏省六大高峰人才计划资助项目(2014-DZXX-017)
