为了简化半导体激光器电源的电路结构、提升其电能转换效率、实现输出电流的快速动态响应, 采用单管正激变换的并联交错技术, 设计出一种2kW单级变换的开关型直流驱动电源。测试并分析了电源的静态特性、动态特性及电能转换效率。结果表明, 电源的效率高达85%; 输出电流0A~100A的上升、下降时间仅为1ms; 满载100A工作时, 输出电流的纹波系数仅为0.04%。与两级串联结构的半导体激光器电源相比, 电源的效率得以提升, 输出电流的动态响应速度迅速, 满足激光加工的要求。

In order to simplify the structure of laser diode drivers, improve the power conversion efficiency and dynamic response of the output current, a 2kW single-stage switching power supply was developed with interleaved single ended forward conversion. Static characteristics, dynamic characteristics and power conversion efficiency of the laser diode driver were tested and analyzed. The results show that the power conversion efficiency is up to 85%. The rise time and fall time of output current in range of 0A~100A is 1ms. The ripple coefficient of output current is 0.04% when output current is 100A. Compared with laser diode driver with two-level cascade structure, the power conversion efficiency of the power supply was promoted. The dynamic response of output current is so rapid that the power supply meets requirements of laser processing.