The ad lamp-box controller is designed in consideration that ordinary urban ad lights usually remain lit through the night and a specially assigned staff needs to be on duty to control their switches.It can be automat...The ad lamp-box controller is designed in consideration that ordinary urban ad lights usually remain lit through the night and a specially assigned staff needs to be on duty to control their switches.It can be automatically controlled with a photo resistance testing the day and night as well as a CD4060 chip controlling the length of time interval between switching the ad lamp-boxes on and off.In this way,both energy and labor can be saved with the controller.It is matching with the target of"constructing a conservation-minded society"in our country and deserves to be promoted in market with its practical significance.展开更多
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...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。展开更多
A new scheme of automotive high intensity discharge(HID) lamps with electronic ballasts is proposed. The design of the proposed ballast and some experimental results are presented. The proposed scheme is consisted of ...A new scheme of automotive high intensity discharge(HID) lamps with electronic ballasts is proposed. The design of the proposed ballast and some experimental results are presented. The proposed scheme is consisted of the high frequency DC-DC converter and the low frequency DC-AC inverter. This system separates the input voltage of the ignitor from DC link voltage using auxiliary winding, then it could use the lower voltage rating power devices for HID lamp ballast system and reduce the size of HID lamp ballast. The proposed ballast controller using micro-controller unit(MCU) controls the frequency to operate the DC-DC converter in critical conduction mode, which reduces the noise of the circuit and improves the efficiency by 2%~4%.展开更多
基金supported by the Doctor Subject Foundation of the Gansu Natural Science Foundation of China(1107RJ-ZA170)
文摘The ad lamp-box controller is designed in consideration that ordinary urban ad lights usually remain lit through the night and a specially assigned staff needs to be on duty to control their switches.It can be automatically controlled with a photo resistance testing the day and night as well as a CD4060 chip controlling the length of time interval between switching the ad lamp-boxes on and off.In this way,both energy and labor can be saved with the controller.It is matching with the target of"constructing a conservation-minded society"in our country and deserves to be promoted in market with its practical significance.
文摘为解决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。
文摘A new scheme of automotive high intensity discharge(HID) lamps with electronic ballasts is proposed. The design of the proposed ballast and some experimental results are presented. The proposed scheme is consisted of the high frequency DC-DC converter and the low frequency DC-AC inverter. This system separates the input voltage of the ignitor from DC link voltage using auxiliary winding, then it could use the lower voltage rating power devices for HID lamp ballast system and reduce the size of HID lamp ballast. The proposed ballast controller using micro-controller unit(MCU) controls the frequency to operate the DC-DC converter in critical conduction mode, which reduces the noise of the circuit and improves the efficiency by 2%~4%.
