CAJ | 학술논문

为解决脉冲序列（pulse train，PT）控制开关DC-DC变换器稳态输出电压纹波较大的问题，通过研究较大输出电压纹波的产生机理，提出了一种变脉冲宽度脉冲序列（variable width pulse train，VWPT）控制方法。该方法基于电感电流断续导电模式（discontinuous conduction mode，DCM）Buck变换器，根据负载功率的变化，采用数字控制方式动态调节高、低功率脉冲占空比，得到两个能量差异较小的驱动脉冲，实现对变换器的控制，以获得明显优于PT控制的输出电压纹波特性。实验结果表明，相比于PT控制，VWPT控制可以有效降低变换器的稳态输出电压纹波50％左右。
위해결맥충서렬（pulse train，PT）공제개관DC-DC변환기은태수출전압문파교대적문제，통과연구교대수출전압문파적산생궤리，제출료일충변맥충관도맥충서렬（variable width pulse train，VWPT）공제방법。해방법기우전감전류단속도전모식（discontinuous conduction mode，DCM）Buck변환기，근거부재공솔적변화，채용수자공제방식동태조절고、저공솔맥충점공비，득도량개능량차이교소적구동맥충，실현대변환기적공제，이획득명현우우PT공제적수출전압문파특성。실험결과표명，상비우PT공제，VWPT공제가이유효강저변환기적은태수출전압문파50％좌우。
In order to solve the problem that DC-DC converter switch has a large steady-state output voltage ripple in pulse train (PT)control,a variable width pulse train (VWPT)control method was proposed after analysis of the generating mechanism of large output voltage ripples. The VWPT control method is based on a buck converter operated in discontinuous conduction mode (DCM). According to the load power change,the duty ratios of high and low power pulses can be regulated dynamically by digital control,and then the converter can be controlled by two drive pulses with small energy discrepancy. Thus,the characteristics of output voltage ripple in VWPT control are obviously better than in PT control. The experimental results show that the steady-state output voltage ripple in VWPT control can be reduced about 50% compared with that in PT control.