摘要
本文提出了一种新颖的恒流多路输出技术方案,该方案采用一个稳压电源给并联的多路开关电源供电,采用数字控制方法控制多路开关管的迟滞电流以实现恒流,用于中小功率LED的驱动。本文就其中一路恒流源的环路控制进行设计,用状态空间平均法对主功率电路建模,根据设计要求求得补偿环路的传递函数,并利用双线性变换法将其从S域离散到Z域,由此获得数字控制参数。
This paper presents a novel technical scheme of multi-output constant current power supply, in which a voltage source is connected parallel multiplex switching power supply, the hysteretic current of multiplex switching is controlled by digital method. It is available to drive moderate and small power LED. In the paper, the loop control of one constant current power supply is designed, using State-Space Averaging Method to model the main circuit, seeking the transfer function of the compensation loop circuit based on the design requirement, which is diseretized from the S domain to Z domain by the Tustin method, thereby obtaining digital control parameters.
出处
《照明工程学报》
2013年第1期124-128,共5页
China Illuminating Engineering Journal
关键词
LED
变频控制
状态空间平均法
数学模型
数字补偿器
LED
variable-frequency control
state-space averaging method
mathematic model
digital compensator
