基于平均电流控制的恒功率控制电路设计  

Design of constant power control circuit based on average current control

作　　者：王江 王斌[1] 郭磊 WANG Jiang;WANG Bin;GUO Lei(College of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Wuxi Leiyue Optoelectronics Co.,Ltd.,Wuxi 214200,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065 [2]无锡磊玥光电有限公司,江苏无锡214200

出　　处：《现代电子技术》2024年第12期1-7,共7页Modern Electronics Technique

基　　金：国家自然科学基金项目(62001074);重庆市研究生科研创新项目(CYS22443)

摘　　要：为解决HID灯的老化及灯的伏安特性变化引起的功率漂移问题,基于Buck降压变换器的平均电流控制模式,设计并制作了一款具有恒功率控制能力的数字控制电子镇流器驱动电路,包含两个控制环路:内电流环路用于维持稳定驱动,外功率环路用于维持灯在其使用期间的功率恒定,并根据Buck降压变换器DCM模式下的小信号模型,以PI算法作为数字补偿器,完成补偿环路设计,保证电路输出稳定性。为抑制声共振,该电路结构采用三级式结构的电子镇流器,以低频方波驱动。设计和测试结果表明,该电子镇流器驱动电路可实现450 W的恒功率控制,误差值小于3%。该电子镇流器驱动电路结构简单,可靠性高,可适用于450 W HID灯驱动。In order to improve the power drift problem caused by the aging of HID(high intensity discharge)lamps and the changes in their volt ampere characteristics,a digital controlled electronic ballast drive circuit with constant power control capability is designed and fabricated based on the average current control mode of Buck buck converter.It includes two control loops:the inner current loop is used to maintain stable driving,and the outer power loop is used to maintain a constant power of the lamp during its use.Based on the small signal model of the Buck buck converter in DCM mode,the PI algorithm is used as a digital compensator to complete the compensation loop design and ensure the stability of the circuit output.The three-level electronic ballast driven by low-frequency square wave is used in the circuit structure to suppress acoustic resonance.The design and testing results show that the driving circuit of the electronic ballast can realize a constant power control of 450 W,with an error value less than 3%.The electronic ballast has a simple driving circuit structure,high reliability,and can be used for driving 450W HID lamps.

关 键 词：电子镇流器 高强度气体放电(HID)灯 恒功率控制 平均电流控制 数字控制 降压变换器 声共振 

分 类 号：TN722.75-34[电子电信—电路与系统] TM923.61[电气工程—电力电子与电力传动]