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数字虚拟峰值电压控制Buck变换器分析

Analysis of Buck Converter with Digital Virtual Peak Voltage Control
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摘要 在传统数字峰值电压(DPV)控制的基础上,提出了数字虚拟峰值电压(DVPV)控制算法,采用对称三角前缘(SLT)调制,分析了开关变换器数字虚拟峰值电压控制的稳定性问题。将此控制算法用于Buck变换器中,分析了负载突变时输出电压的瞬态响应。在变换器稳定的前提下,通过增大数字虚拟峰值电压控制参数Ai,与传统改进型数字峰值电压(IDPV)控制相比,进一步减小了负载突变变轻时的电压超调和负载突变变重时的电压跌落,并减小了动态调整时间,瞬态响应性能得到改善。实验结果与理论分析和仿真有很好的一致性,表明了新算法的可行性和优越性。 Based on traditional digital peak voltage (DPV) control, a digital virtual peak voltage (DVPV) control algorithm is proposed. Using SLT (symmetrical triangular leading edge) modulation, the stability of Buck converter with DVPV control is analyzed. Thereafter, the transient response of the output voltage during load stepping is analyzed. By increasing the DVPV control parameter Ai, the overshoot during load stepping-down, the drop during load stepping-up and the dynamic adjustment of time during load stepping can be further reduced comparing with improved traditional digital peak voltage (IDPV) control. Simulation and experiments were carried out to verify it.
作者 王禹玺 马皓
出处 《电工技术学报》 EI CSCD 北大核心 2013年第7期184-190,共7页 Transactions of China Electrotechnical Society
关键词 数字峰值电压控制 数字虚拟峰值电压控制 SLT调制 负载切换 瞬态响应 Digital peak voltage control, digital virtual peak voltage control, SLT modulation, load stepping, dynamic performance
作者简介 王禹玺男,1988年生,博士研究生,主要研究方向为直流直流变换器及其控制策略。 马皓男,1969年生,博士,教授,研究方向为电力电子技术及其应用、电力电子先进控制技术和电力电子系统故障诊断。
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