大功率半导体激光器越来越成为主力光源, 针对传统的开关型电源半桥或全桥变换器电流的动态响应速度及控制精度问题, 根据激光加工中快速开关的要求, 使用了ZVS软开关技术及端采用同步倍流整流, 从而达到减耗高效以及对负载电压的自适应能力的目的, 同时采用一种基于最优算法的极点配置控制实现电压和电流的精准调节。整个系统使用闭环负反馈回路控制, 系统软件仿真采用SIMULINK环境, 调控简便。研究结果表明, 控制精度高达0.1%, 并在0.1 s内完成回路响应。当实验负载RL＞0.48 Ω时, 变换器输出为恒流特性; 满载(50 A/24 V)输出时, 电源效率超过90%, 纹波系数小于1%。采取同步整流具有高于二极管整流的效率。

High-power semiconductor laser device has become the main optical source. Due to issues of the dynamic response speed and control accuracy of the current from traditional switching mode power supply with half-bridge or full-bridge converter currents. According to the requirements of fast switching in laser processing, ZVS soft-switching technology and synchronous double current rectifier are adopted to achieve the purpose of high efficiency and adaptive to load voltage. At the same time, a pole-based configuration control based on the optimal algorithm is used to achieve precise adjustment of voltage and current. The whole system employs closed-loop negative feedback loop control, with system software simulation in SIMULINK environment, which is simply regulated. The results show that the control accuracy can reach 0.1%, and loop response time is completed within 0.1 s. When the experimental load RL＞0.48 Ω, the converter output is constant current. When at full load output (50 A/24 V), the power supply efficiency exceeds 90%, ripple factor is less than 1%. Taking synchronous rectifier has higher efficiency than diode rectifier.