CAJ | 학술논문

本文提出了Buck电路用作LED驱动的主电路连接方式。在对各种电流控制模式进行分析的基础上，引入固定导通时间（COT）控制模式，保留滞环控制优点的同时能有效解决滞环控制的频率变化问题。对其稳态和动态性能进行分析，获得了良好稳态精度和动态性能。并采用电力电子专用仿真软件PSIM（6．0版）对Buck变换器LED驱动电路进行了仿真。
본문제출료Buck전로용작LED구동적주전로련접방식。재대각충전류공제모식진행분석적기출상，인입고정도통시간（COT）공제모식，보류체배공제우점적동시능유효해결체배공제적빈솔변화문제。대기은태화동태성능진행분석，획득료량호은태정도화동태성능。병채용전력전자전용방진연건PSIM（6．0판）대Buck변환기LED구동전로진행료방진。
This article proposes to use Buck LED driver circuit as the main circuit connection. On the basis of an analysis of various types of current control modes, fixed-time （COT） control mode is introduced, which retains advantages of hysterics control and solves the frequency change of hysterics control effectively as well. Through analysis of its steady-state and dynamic performance, the system can gain a good steady state accuracy and dynamic performance. By the use of dedicated power electronic simulation software PSIM （version 6.0）, the Buck converter LED drive circuit is simulated.