摘要
针对脉冲跨周期调制(PSM)开关DC-DC变换器输出电压纹波较大的问题,该文提出一种新型的自适应占空比跨周期(ADPS)控制方法。在ADPS控制的变换器中,轻载下,每个周期变换器控制脉冲的占空比与该周期开始时输出电压与参考电压误差的平方根近似成正比:负载越轻,变换器的输出电压纹波越小。研究表明,ADPS控制的DC-DC变换器不仅具有比PSM控制的变换器更低的输出电压纹波,同时具有优异的鲁棒性和瞬态响应能力。
Considering the issue of the large output voltage ripple of Pulse Skip Modulation （PSM） controlled switching DC-DC converter, a novel control technique named Pulse Skip with Adaptive Duty ratio （ADPS） is proposed in this paper. In ADPS converter with light load, the duty ratio of control pulse of each switching cycle is approximately proportional to the square root of the voltage error between the reference voltage and the output voltage at the beginning of the switching cycle. Also, the lighter the load is, the smaller the ripple is. The experimental results show that ADPS converter not only has lower output voltage ripple than PSM converter, but also has excellent control robustness and transient performance.
出处
《电子与信息学报》
EI
CSCD
北大核心
2014年第9期2265-2271,共7页
Journal of Electronics & Information Technology
基金
国家自然科学基金(61274027)
高等学校博士学科点专项科研基金(20120185110005)资助课题
关键词
DC-DC变换器
集成电路
控制技术
自适应占空比跨周期
电流断续模式
输出电压纹波
DC-DC converter
Integrated circuit
Control technique
Pulse Skip with Adaptive Duty ratio （ADPS）
Discontinuous conduction mode
Output voltage ripple
