摘要
设计一种新颖的独立式应急照明系统.以PIC16F876微处理器为核心,采用变压整流/逆变电路复用结构,具有并网能馈方式的自动维护性定时放电等功能.介绍了主要部分的结构、工作原理、PWM恒流充电及SPWM逆变控制算法.结果表明:该系统减小了日常维护的强度,提高了电能利用率,保障了设备在应急状态下更高的可靠性,具有实际应用价值.
The novel freestanding emergency lighting system is designed. The system bases on PIC16F876 microprocessor and adopts multiplexing structure of variation voltage rectifier/inverter circuit. It has the function of auto maintenance time discharge with energy fed infinite bus. This paper introduces the main structure of system, principle, PWM constant current charge and SPWM inverter control Algorithm. Experiment results show that the system can decrease strength of routine maintenance, improve the utilization of power energy, ensure the higher reliability in the status of emergency and have practical values.
出处
《西安工业大学学报》
CAS
2008年第1期58-61,85,共5页
Journal of Xi’an Technological University
关键词
应急照明
蓄电池
恒流充电
并网能馈
维护性放电
emergency lighting
battery
constant current charge
energy fed infinite bus
maintenance discharge
