基于单周电流峰值控制的金卤灯电子镇流器  

A Novel Electronic Ballast for HID Lamps based on Peak Current Control Strategy with Single Cycle Control

作　　者：左壮[1] 张相军[1] 徐殿国[1] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《电力电子技术》2007年第10期44-46,共3页Power Electronics

摘　　要：提出了一种基于半桥双Buck结构的两级低频方波金卤灯电子镇流器。前级为功率因数校正电路;后级双Buck电路为金卤灯提供150Hz低频方波电流,有效地避免了声共振的发生。单周电流峰值控制策略的采用,克服了逆变电路换向期间的电流过冲问题;AVR照明专用单片机的运用,保证了控制策略的实现,并且简化了控制电路。通过70W金卤灯电子镇流器的样机实验,验证了电路及控制策略的可行性。This paper presents a low-cost low-frequency square-wave digital electronic ballast for high density discharge （HID） lamps.A highly efficient and reliable topology-dual Buck half-bridge inverter （DBI） was adopted to supply the lamp with low-frequency square-wave positive and negative current avoiding acoustic resonances.The constant bus voltage was provided by the front end PFC stage.The DBI was controlled to operate under ZVS condition and the problem of excessive inductor current during low-frequency reversal transient was solved by single cycle control.The AVR special microcontroller for HID ballast was used to raise control performance and simplified the control circuit.The presented circuit is verified with experimental resuhs.A prototype of 70W digital HID ballast has been built with the whole efficiency of 92%.

关 键 词：照明 镇流器 控制/高强度气体放电灯 

分 类 号：TM923.61[电气工程—电力电子与电力传动]