望远镜用大功率智能开关电源控制系统设计

Study of intelligent high power switching power source system used in the telescope shaft drive power system

根据望远镜轴系驱动电源的特性设计了基于脉宽调制(PWM)控制芯片和IGBT模块的大功率智能开关电源。主电路拓扑为全桥逆变电路,次级为全波整流电路,并采用智能接口将开关电源与上位机直接相连,同时还有输出短路、过流、过温、过压和欠压保护电路,大大简化了系统的设计,提高了系统工作的可靠性。对控制环路进行了详细的分析和设计,开关电源的输出电压连续可调,可满足不同规格的望远镜轴系驱动电源的要求。最后通过实验验证了系统设计的有效性。

The intelligent high power switching power source used in the telescope shaft drive power system is designed based on pulse width modulation （PWM） control chip SG2525 and IGBT module. The full-bridge inverter circuit and the full-wave rectifier circuit are used in the main circuit, in addition, the switching power is connected to the computer through an intelligent interface, at the same time, short circuit, over current, over temperature and lower voltage protection circuits greatly simplify the design of the system and improved the reliability of the system. The switching power＇s control circuit is analysed and designed in detail, the out- put voltage can be adjusted continuously to satisfy some different specification motor. The validity of system is also verified by experiment .