https://www.knightli.com/tags/%E7%94%B5%E6%BA%90%E4%BC%98%E7%BC%BA%E7%82%B9/ Recent content in 电源优缺点 on KnightLi的博客 Hugo -- gohugo.io zh-cn Wed, 27 Apr 2022 00:00:00 +0000 https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/ Wed, 27 Apr 2022 00:00:00 +0000 https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/ <h2 id="电源隔离与非隔离的概念">电源隔离与非隔离的概念 </h2><p>电源的隔离与非隔离，主要是针对开关电源而言，业内比较通用的看法是：</p> <ol> <li> <p>非隔离电源：输入和输出之间有直接的电流回路，例如，输入和输出之间是共地的。 <img src="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/1.jpg" width="480" height="204" srcset="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/1_hu_ef32b0c7ac1c4a6b.jpg 480w, https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/1_hu_26d052d96686d203.jpg 1024w" loading="lazy" alt="非隔离电源" class="gallery-image" data-flex-grow="235" data-flex-basis="564px" ></p> </li> <li> <p>隔离电源：电源的输入回路和输出回路之间没有直接的电气连接，输入和输出之间是绝缘的高阻态，没有电流回路 <img src="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/2.jpg" width="479" height="243" srcset="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/2_hu_73b34a98166dd6d3.jpg 480w, https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/2_hu_3fd9117b2fb8e484.jpg 1024w" loading="lazy" alt="隔离电源" class="gallery-image" data-flex-grow="197" data-flex-basis="473px" ></p> </li> </ol> <h2 id="如何从实物区分">如何从实物区分 </h2><p><img src="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/1.png" width="349" height="300" srcset="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/1_hu_bb2c245cbb673675.png 480w, https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/1_hu_3f349a31cf02c5b3.png 1024w" loading="lazy" alt="非隔离电源" class="gallery-image" data-flex-grow="116" data-flex-basis="279px" ><br> <img src="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/2.png" width="365" height="299" srcset="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/2_hu_4064dee29aa8ffc5.png 480w, https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/2_hu_fea40f052d9c0b95.png 1024w" loading="lazy" alt="隔离电源" class="gallery-image" data-flex-grow="122" data-flex-basis="292px" ></p> <h2 id="隔离和非隔离电源的主要差别">隔离和非隔离电源的主要差别： </h2><ul> <li>隔离模块的可靠性高，但成本高，效率差点。</li> <li>非隔离模块的结构很简单，成本低，效率高，安全性能差。</li> </ul> <h2 id="隔离电源与非隔离电源的优缺点">隔离电源与非隔离电源的优缺点 </h2><p><img src="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/3.png" width="1073" height="648" srcset="https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/3_hu_2ddf9fdef66f35cf.png 480w, https://www.knightli.com/2022/04/27/%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E9%9D%9E%E9%9A%94%E7%A6%BB%E7%94%B5%E6%BA%90-%E4%BC%98%E7%BC%BA%E7%82%B9/3_hu_5750bd481d2f75c6.png 1024w" loading="lazy" alt="优缺点" class="gallery-image" data-flex-grow="165" data-flex-basis="397px" ></p> <h2 id="隔离与非隔离电源的应用场合">隔离与非隔离电源的应用场合 </h2><ol> <li>系统前级的电源，为提高抗干扰性能，保证可靠性，一般用隔离电源；</li> <li>电路板内的IC或部分电路供电，从性价比和体积出发，优先选用非隔离的方案；</li> <li>对安全有要求的场合，如需接市电的AC-DC，或医疗用的电源，为保证人身的安全，必须用隔离电源，有些场合还必须用加强隔离的电源；</li> <li>对于远程工业通信的供电，为有效降低地电势差和导线耦合干扰的影响，一般用隔离电源为每个通信节点单独供电；</li> <li>对于采用电池供电，对续航力要求严苛的场合，采用非隔离供电。</li> </ol>