基于谐振变换技术的激光器驱动电源设计

The Design of the Laser Drive Power Supply Based on the Quasi-resonant Converter Technique

近年来,激光器已广泛应用于军事领域,驱动电源是决定激光器整体性能的重要因素。针对大功率机载激光器对驱动电源的要求,采用RLC谐振变换技术及全桥拓扑结构,设计出用恒流源驱动的激光器电源,系统采用恒流源、软启动,限流及限压等保护措施,实现对激光器的有效保护,并采用温度控制电路,对激光器进行温度控制,从而使得电源的输出功率稳定。文中同时给出了输入滤波电路、主电源电路、控制电路及保护电路的原理图。最后,通过实验测试证明了文中所设计的电源具有高稳定性和强干扰能力。

In recent years, laser machine has been widely applied in the military realm. However, the driving power supply is the most important factor that limits the whole performance of the laser machine. According to the request of the great power laser to the drive supply, a new design based on constant current power source is proposed, which includes a RLC quasi - resonant converter technique and a topologic structure of the whole bridge. To achieve the effective protection of laser, a constant current source driver, soft start - up, limit flow and limit electric voltage implement are taken. And, the electric circuit of temperature control is adopted to control the temperature of the laser, which can ensure the stability of output power. In addition, principle figures of the filter circuit, main power supply circuit and protection circuit are included. Finally, the high stability and the strong interference ability of the newly designed power supply are verified through experiments.