CAJ | 학술논문

在LCD背光源、隧道照明等大功率LED照明领域， LED 驱动电源需实现功率因数校正、输入输出隔离、多路恒流输出功能。为此，该文提出一种包括高频AC/AC变换模块和高频AC/DC变换模块的模块化多路输出LED驱动电源，并主要研究一种输出为高频正弦交流电压的单级高频AC/AC变换器，其内部包括功率因数校正和高频DC/AC变换两个功率变换单元。首先对单级AC/AC变换器的拓扑进行推演，然后分析其工作原理及性能特点。由于功率因数校正单元的工作原理及性能特点在以前的文献中有详细介绍，该文主要描述高频DC/AC变换单元的工作原理，并采用基波分析法对其性能进行分析。最后搭建一台输出功率为100W的单级高频AC/AC变换器实验样机，实验结果表明：在额定输入输出条件下，功率因数达到0.94，直流母线电容电压在全输入输出范围内最高为440V，满足实际应用需求。
재LCD배광원、수도조명등대공솔LED조명영역， LED 구동전원수실현공솔인수교정、수입수출격리、다로항류수출공능。위차，해문제출일충포괄고빈AC/AC변환모괴화고빈AC/DC변환모괴적모괴화다로수출LED구동전원，병주요연구일충수출위고빈정현교류전압적단급고빈AC/AC변환기，기내부포괄공솔인수교정화고빈DC/AC변환량개공솔변환단원。수선대단급AC/AC변환기적탁복진행추연，연후분석기공작원리급성능특점。유우공솔인수교정단원적공작원리급성능특점재이전적문헌중유상세개소，해문주요묘술고빈DC/AC변환단원적공작원리，병채용기파분석법대기성능진행분석。최후탑건일태수출공솔위100W적단급고빈AC/AC변환기실험양궤，실험결과표명：재액정수입수출조건하，공솔인수체도0.94，직류모선전용전압재전수입수출범위내최고위440V，만족실제응용수구。
In many high power applications, such as large scale LCD panel backlighting, tunnel lighting, etc, LED driver should realize the following three functions at least: power factor correction, input and output electrical isolation, and multiple constant current outputs. A modular multi-channel LED driver composed of high frequency AC/AC module and high frequency AC/DC modules was proposed. The main topic of this paper is a kind of single stage high frequency AC/AC converter with high frequency sinusoidal ac output voltage, which consists of two power conversion cells: power factor correction cell and high frequency DC/AC conversion cell. Firstly, the topology deduction of the single stage AC/AC converter was performed. Secondly, its operation principle was introduced. Since the operation theory and characteristics of the power factor correction cell have been analyzed completely in the previous publications, the main focus of this paper is the high frequency DC/AC conversion cell. The operation theory of the high frequency DC/AC conversion cell was described in detail and characteristics were analyzed based on the fundamental analysis method. Finally, a 100W prototype was built to verify the correction of the analysis. The measured power factor is 0.94 with normal input and output and the highest DC bus voltage is 440V in the whole input and output ranges, which meets the practical applications.