CAJ | 학술논문

对作者介绍的照明用大功率无桥LED驱动电路的输入交流工频电流波形在设定电路条件后的频谱和谐波含量进行了分析和计算,其结果是,在电路最低工作频率以下的频率范围内基本不存在谐波成分,电路输入电流的总谐波含量THD随最小输入电流脉冲宽度T_0_((min))增大而上升,随电路的输出直流电压与输入交流电压有效值的比U_o/U_i的增大而下降.并指出在电路的输入端需要一个滤波电路,分析了滤波电路的滤波效果,给出了滤波电路的设计方法.
대작자개소적조명용대공솔무교LED구동전로적수입교류공빈전류파형재설정전로조건후적빈보화해파함량진행료분석화계산,기결과시,재전로최저공작빈솔이하적빈솔범위내기본불존재해파성분,전로수입전류적총해파함량THD수최소수입전류맥충관도T_0_((min))증대이상승,수전로적수출직류전압여수입교류전압유효치적비U_o/U_i적증대이하강.병지출재전로적수입단수요일개려파전로,분석료려파전로적려파효과,급출료려파전로적설계방법.
Research on a Fourier analysis of high-power non-bridge LED drive circuit in the illumi-nation use, introduced by the authors, is carried out. Under the given circuit condition, the con-tent of its frequency spectrum and harmonic was analyzed and calculated. The result shows that there almost exists no harmonic in the frequency range below the lowest working frequency of the circuit. THD, the content of the total harmonic of the circuit input current, rises with increase of the minimum input current pulse width T_0_((min)) and lowers with the increase of the effective value ratio of circuit output direct voltage and input alternating voltage U_o/U_i. It indicates that a filter circuit is needed at the input port of the circuit and its filtering effect was analyzed. The design method of the filter circuit is also provided.