摘要
针对传统大功率交流LED控制策略中未能解决的分段导通能量不平衡问题,本文提出了一种基于LED发光能量均衡的分段导通控制策略。该策略在保留原有的高功率因数/低谐波的基础上,根据每一段LED的开通和关断时间加以算法优化,从而保证在一个交流周期内分段LED的发光能量严格相等,延长了LED灯具的实际使用寿命。给出了原理分析和设计原则,实验样机证明了该新颖控制策略的有效性。
To overcome the energy unbalancing issue exhibiting in the conventional high power AC LED control strategies, this paper proposed a novel control strategy based on the energy balancing of each LED segments when powered on. While inherited the high PF/low THD merits as like its ancestor, this proposed control method can assure an equal power among each LED segment theoretically throughout an entire AC period, based on the optimum algorithm for conducting time, and which can lengthen the lifespan for the LED luminaire. Principle analysis and design considerations were given and an experimental prototype verified the validity.
作者
陈威
刘冬
叶少士
Chen Wei1 Liu Dong1 Ye Shaoshi2(1. Zhejiang Insigma United Engineering Co., Ltd, Hangzhou 310051; 2. Nokia Networks, Hangzhou 31005)
出处
《电气技术》
2018年第2期46-48,53,共4页
Electrical Engineering
基金
国家高技术研究发展计划项目(863计划)(2013AA03A117)
