CAJ | 학술논문

设计了一种采用新型数字控制方法的原边反馈反激式LED恒流驱动电源。该电源电路运用拐点检测法测量副边电路放电时间,运用增量式PID算法调节恒流和功率因数,实现对电路的精确恒流控制和保持较高的功率因数。通过分析其控制原理,给出设计流程,最终基于FPGA实现控制,进行了样机设计和算法验证。实验结果表明所提出电路全工作范围内恒流精度达到6%,功率因数高于0.97,整机效率超过80%。本电路结构简单,控制精度高,具有较高的实用价值。
설계료일충채용신형수자공제방법적원변반궤반격식LED항류구동전원。해전원전로운용괴점검측법측량부변전로방전시간,운용증량식PID산법조절항류화공솔인수,실현대전로적정학항류공제화보지교고적공솔인수。통과분석기공제원리,급출설계류정,최종기우FPGA실현공제,진행료양궤설계화산법험증。실험결과표명소제출전로전공작범위내항류정도체도6%,공솔인수고우0.97,정궤효솔초과80%。본전로결구간단,공제정도고,구유교고적실용개치。
A new primary side feedback flyback digital control LED driver is presented, using corner detection to measure the discharge time of secondary circuit and achieving accurate constant output current and high power factor by increment PID. Through analysis with the control principal,the detailed design process is provided and the control based on FPGA is finally realized. The design of the prototype machine and the verification of algorithm are also carried out. The experiment results show that the accuracy of constant current has reached 6% and power factor correction exceeds 0.97 and the efficiency is up to 80%. The circuit is simple and has high control precision. It is of highly practical value.