基于PI闭环控制的BUCK电路仿真研究：关键波形分析与参数探讨，开关频率90kHz,基于PI闭环控制的BUCK电路仿真研究：90kHz开关频率下的关键节点波形分析,BUCK电路的仿真，simulink
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基于PI闭环控制的BUCK电路仿真研究：关键波形分析与参数探讨，开关频率90kHz,基于PI闭环控制的BUCK电路仿真研究：90kHz开关频率下的关键节点波形分析,BUCK电路的仿真，simulink仿真采用PI闭环方式进行控制。了解BUCK变器的基本原理，并对BUCK变器进行仿真，研究其控制方式与及其基本功能，观察关键节点的波形。输入电压12V，输出电压1.2V，使用PI闭环进行调节，开关频率为90kHz。各个部分参数如下所示。,BUCK电路仿真; Simulink仿真; PI闭环控制; BUCK变换器基本原理; 关键节点波形; 输入电压12V; 输出电压1.2V; 开关频率90kHz,基于PI闭环控制的BUCK变换器仿真研究 <link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/90434228/2/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/90434228/bg1.jpg"/><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">**BUCK<span class="_"> </span><span class="ff2">电路的仿真与<span class="_ _0"> </span></span>PI<span class="_ _0"> </span><span class="ff2">闭环控制方式研究</span>**</div><div class="t m0 x1 h2 y2 ff2 fs0 fc0 sc0 ls0 ws0">一、引言</div><div class="t m0 x1 h2 y3 ff1 fs0 fc0 sc0 ls0 ws0">BUCK<span class="_"> </span><span class="ff2">变换器是<span class="_ _1"></span>一种直<span class="_ _1"></span>流</span>-<span class="ff2">直<span class="_ _1"></span>流转<span class="_ _1"></span>换器，<span class="_ _1"></span>广泛应<span class="_ _1"></span>用于各<span class="_ _1"></span>种电子<span class="_ _1"></span>设备中<span class="_ _1"></span>。为了<span class="_ _1"></span>更好<span class="_ _1"></span>地理解<span class="_ _1"></span>其工</span></div><div class="t m0 x1 h2 y4 ff2 fs0 fc0 sc0 ls0 ws0">作原理和控制方式，<span class="_ _2"></span>本文通过<span class="_ _0"> </span><span class="ff1">Simulink<span class="_"> </span></span>仿真软件对<span class="_ _0"> </span><span class="ff1">BUCK<span class="_"> </span></span>电路进行仿真研究，<span class="_ _2"></span>特别关注采用</div><div class="t m0 x1 h2 y5 ff1 fs0 fc0 sc0 ls0 ws0">PI<span class="_ _0"> </span><span class="ff2">闭环方式进行控制的情况。</span></div><div class="t m0 x1 h2 y6 ff2 fs0 fc0 sc0 ls0 ws0">二、<span class="ff1">BUCK<span class="_ _0"> </span></span>变换器的基本原理</div><div class="t m0 x1 h2 y7 ff1 fs0 fc0 sc0 ls0 ws0">BUCK<span class="_ _0"> </span><span class="ff2">变换器的基本原理是通过控制开关管的通断，<span class="_ _3"></span>将输入的直流电压转换为输出电压。<span class="_ _4"></span>当</span></div><div class="t m0 x1 h2 y8 ff2 fs0 fc0 sc0 ls0 ws0">开关管导通时，电感储存能量<span class="_ _2"></span>；<span class="_ _2"></span>当开关管断开时，电感释放能量并通过二极管或同步整流管</div><div class="t m0 x1 h2 y9 ff2 fs0 fc0 sc0 ls0 ws0">对输出电容充电，从而实现对输出电压的调节。</div><div class="t m0 x1 h2 ya ff2 fs0 fc0 sc0 ls0 ws0">三、仿真环境与模型构建</div><div class="t m0 x1 h2 yb ff2 fs0 fc0 sc0 ls0 ws0">在<span class="_ _0"> </span><span class="ff1">Simulink<span class="_"> </span></span>仿真软件中，<span class="_ _5"></span>我们首先需要构建<span class="_ _0"> </span><span class="ff1">BU<span class="_ _1"></span>CK<span class="_ _0"> </span></span>电路的模型。<span class="_ _5"></span>模型中包含电感、<span class="_ _5"></span>电容、<span class="_ _5"></span>开</div><div class="t m0 x1 h2 yc ff2 fs0 fc0 sc0 ls0 ws0">关管、二<span class="_ _1"></span>极管等关<span class="_ _1"></span>键元件。输<span class="_ _1"></span>入电压设<span class="_ _1"></span>定为<span class="_ _6"> </span><span class="ff1">12V</span>，输出<span class="_ _1"></span>电压设定<span class="_ _1"></span>为<span class="_ _6"> </span><span class="ff1">1.2V</span>，开关频<span class="_ _1"></span>率设定为</div><div class="t m0 x1 h2 yd ff1 fs0 fc0 sc0 ls0 ws0">90kHz<span class="ff2">。</span></div><div class="t m0 x1 h2 ye ff2 fs0 fc0 sc0 ls0 ws0">四、<span class="ff1">PI<span class="_ _0"> </span></span>闭环控制方式的实现</div><div class="t m0 x1 h2 yf ff1 fs0 fc0 sc0 ls0 ws0">PI<span class="_ _0"> </span><span class="ff2">闭环控制方式是一种常见的电压控制方式，通过比例</span>-<span class="ff2">积分控制器对输出电压进行实时调</span></div><div class="t m0 x1 h2 y10 ff2 fs0 fc0 sc0 ls0 ws0">节。在仿<span class="_ _1"></span>真模型中，<span class="_ _1"></span>我们加入<span class="_ _6"> </span><span class="ff1">PI<span class="_"> </span></span>控制器，<span class="_ _1"></span>通过实时采<span class="_ _1"></span>集输出电<span class="_ _1"></span>压并与设定<span class="_ _1"></span>值进行比较<span class="_ _1"></span>，计</div><div class="t m0 x1 h2 y11 ff2 fs0 fc0 sc0 ls0 ws0">算出控制信号，进而调节开关管的通断时间，以达到稳定输出电压的目的。</div><div class="t m0 x1 h2 y12 ff2 fs0 fc0 sc0 ls0 ws0">五、仿真过程与结果分析</div><div class="t m0 x1 h2 y13 ff2 fs0 fc0 sc0 ls0 ws0">在仿真过程中，<span class="_ _5"></span>我们观察了关键节点的波形，<span class="_ _4"></span>包括输入电压、<span class="_ _5"></span>输出电压、<span class="_ _7"></span>电感电流等。<span class="_ _5"></span>通过</div><div class="t m0 x1 h2 y14 ff2 fs0 fc0 sc0 ls0 ws0">调整<span class="_ _6"> </span><span class="ff1">PI<span class="_"> </span></span>控制器的参数<span class="_ _1"></span>，我们可<span class="_ _1"></span>以看到输出<span class="_ _1"></span>电压的稳定<span class="_ _1"></span>性得到明<span class="_ _1"></span>显改善。在<span class="_ _1"></span>多种负载条<span class="_ _1"></span>件下</div><div class="t m0 x1 h2 y15 ff2 fs0 fc0 sc0 ls0 ws0">进行仿<span class="_ _1"></span>真，我<span class="_ _1"></span>们发现<span class="_ _1"></span>采用<span class="_ _6"> </span><span class="ff1">PI<span class="_"> </span></span>闭环控制<span class="_ _1"></span>的<span class="_ _6"> </span><span class="ff1">BUCK<span class="_"> </span></span>电路能够<span class="_ _1"></span>快速响<span class="_ _1"></span>应负载<span class="_ _1"></span>变化，并<span class="_ _1"></span>保持输<span class="_ _1"></span>出电</div><div class="t m0 x1 h2 y16 ff2 fs0 fc0 sc0 ls0 ws0">压的稳定。</div><div class="t m0 x1 h2 y17 ff2 fs0 fc0 sc0 ls0 ws0">六、结论</div><div class="t m0 x1 h2 y18 ff2 fs0 fc0 sc0 ls0 ws0">通过<span class="_ _0"> </span><span class="ff1">Simulink<span class="_"> </span></span>仿真软件对<span class="_ _0"> </span><span class="ff1">BUCK<span class="_"> </span></span>电路进行仿真研究，<span class="_ _8"></span>我们深入了解了<span class="_ _0"> </span><span class="ff1">BUCK<span class="_"> </span></span>变换器的基本原</div><div class="t m0 x1 h2 y19 ff2 fs0 fc0 sc0 ls0 ws0">理和控<span class="_ _1"></span>制方式<span class="_ _1"></span>。采用<span class="_ _6"> </span><span class="ff1">PI<span class="_"> </span></span>闭环<span class="_ _1"></span>控制方式<span class="_ _1"></span>能够有<span class="_ _1"></span>效提高<span class="_ _1"></span>输出电<span class="_ _1"></span>压的稳<span class="_ _1"></span>定性，<span class="_ _1"></span>使<span class="_ _6"> </span><span class="ff1">BUCK<span class="_"> </span></span>电路能够</div><div class="t m0 x1 h2 y1a ff2 fs0 fc0 sc0 ls0 ws0">更好地适应各种负载条件。<span class="_ _4"></span>在未来的电子设备设计和开发中，<span class="_ _4"></span><span class="ff1">BUCK<span class="_"> </span><span class="ff2">电路及其控制方式将发</span></span></div><div class="t m0 x1 h2 y1b ff2 fs0 fc0 sc0 ls0 ws0">挥重要作用。</div><div class="t m0 x1 h2 y1c ff2 fs0 fc0 sc0 ls0 ws0">七、未来展望</div><div class="t m0 x1 h2 y1d ff2 fs0 fc0 sc0 ls0 ws0">随着电子设备的不断发展，<span class="_ _9"></span>对电源管理的要求也越来越高。<span class="_ _9"></span>未来，<span class="_ _9"></span>我们可以进一步研究更先</div><div class="t m0 x1 h2 y1e ff2 fs0 fc0 sc0 ls0 ws0">进的控制算法和优化策略，<span class="_ _5"></span>以提高<span class="_ _0"> </span><span class="ff1">BUCK<span class="_"> </span></span>电路的效率和稳定性。<span class="_ _5"></span>同时，<span class="_ _5"></span>随着新材料和新技术</div></div><div class="pi" data-data='{"ctm":[1.611830,0.000000,0.000000,1.611830,0.000000,0.000000]}'></div></div>