【摘要】 介绍了一种单片机数字控制车用前照明高强度气体放电灯(high intensity discharge,HID)电子镇流器。镇流器系统主要由高频DC/DC开关电源、DC/AC逆变器、高压启动电路和单片机控制电路组成。它通过单片机软件编程,实现精确的数字控制,确保HID灯启动复杂的时序控制和恒功率控制过程,而且可以很好地处理各种故障模式,具有输入过压/欠压保护,输入反接保护,输出短路、开路保护等功能。更多还原

【Abstract】 A ballast system for automotive high intensity discharge(HID) lamp is proposed.The system consists of high frequency DC-DC converter,DC-AC inverter, high voltage ignitor and a microcontroller unit(MCU).The proposed ballast controls the complex start-up process and constant power process by programming on the microcontroller.The ballast features such functions as failure protection,line undervolage,line over-voltage,output short circuit and output disconnection protections.更多还原