一种实现功率信息双传输的半导体激光器驱动电源

A Driving Power Supply of Semiconductor Laser for Simultaneous Transmission of Power and Information

介绍了一种应用于中小型侦察无人机背景下的激光能量传输系统中的半导体激光器驱动电源实现功率和信息同时传输的方法。具体分析了如何在激光器恒流驱动的基础上叠加脉冲电流以确保驱动电源在传递功率的同时还可以传递指令信号。通过采用恒流变换器和双向变换器的并联结构,在保证系统效率最大的基础上使得双向变换器的电感电流可以较快地跟踪信号。双向变换器选择最简单的Buck/Boost产生所需的正、负脉冲电流,以通信信号为电流基准,采用电压环和电流环双环控制,使得双向变换器的输出电流能根据带有指令信息的通信信号而变化。最后搭建了一台原理样机验证了该方法的可行性。

This paper introduced a method to deliver power and information for the semi- conductor laser driving power supply of laser energy transmission system s applied in middle-size and small-size spy planes. It analyzed how to superpose the pulse current onto the constant current to transmit power and instruction signal simultaneously. By the parallel structure of the constant-current converter and the bidirectional converter, the inductor current of the bidirectional converter can quickly trace the instruction while maintaining the maximum efficiency. The bidirectional converter chose the simple buck/boost topology to generate the needed positive or negative pulse current, and taken the communicational signal as reference, applied voltage loop and current loop control strategy to change the output current as the signal changed. At last, a prototype was built in the lab which validated the theoretical analysis and the feasibility of the method.