https://knightli.com/zh-tw/tags/%E9%9B%BB%E6%BA%90%E9%81%B8%E5%9E%8B/ Recent content in 電源選型 on KnightLi的博客 Hugo -- gohugo.io zh-tw Wed, 27 Apr 2022 00:00:00 +0000 https://knightli.com/zh-tw/2022/04/27/%E9%9A%94%E9%9B%A2%E9%9B%BB%E6%BA%90-%E9%9D%9E%E9%9A%94%E9%9B%A2%E9%9B%BB%E6%BA%90-%E5%84%AA%E7%BC%BA%E9%BB%9E/ Wed, 27 Apr 2022 00:00:00 +0000 https://knightli.com/zh-tw/2022/04/27/%E9%9A%94%E9%9B%A2%E9%9B%BB%E6%BA%90-%E9%9D%9E%E9%9A%94%E9%9B%A2%E9%9B%BB%E6%BA%90-%E5%84%AA%E7%BC%BA%E9%BB%9E/ <h2 id="電源隔離與非隔離的概念">電源隔離與非隔離的概念 </h2><p>電源的隔離與非隔離，主要是針對開關電源而言，業內比較通用的看法是：</p> <ol> <li> <p>非隔離電源：輸入和輸出之間有直接的電流迴路，例如，輸入和輸出之間是共地的。 <img src="https://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://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://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="非隔離電源" class="gallery-image" data-flex-grow="235" data-flex-basis="564px" ></p> </li> <li> <p>隔離電源：電源的輸入迴路和輸出迴路之間沒有直接的電氣連接，輸入和輸出之間是絕緣的高阻態，沒有電流迴路 <img src="https://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://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://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="隔離電源" class="gallery-image" data-flex-grow="197" data-flex-basis="473px" ></p> </li> </ol> <h2 id="如何從實物區分">如何從實物區分 </h2><p><img src="https://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://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://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="非隔離電源" class="gallery-image" data-flex-grow="116" data-flex-basis="279px" ><br> <img src="https://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://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://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="隔離電源" class="gallery-image" data-flex-grow="122" data-flex-basis="292px" ></p> <h2 id="隔離和非隔離電源的主要差別">隔離和非隔離電源的主要差別： </h2><ul> <li>隔離模塊的可靠性高，但成本高，效率差點。</li> <li>非隔離模塊的結構很簡單，成本低，效率高，安全性能差。</li> </ul> <h2 id="隔離電源與非隔離電源的優缺點">隔離電源與非隔離電源的優缺點 </h2><p><img src="https://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://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://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="優缺點" class="gallery-image" data-flex-grow="165" data-flex-basis="397px" ></p> <h2 id="隔離與非隔離電源的應用場合">隔離與非隔離電源的應用場合 </h2><ol> <li>系統前級的電源，為提高抗干擾性能，保證可靠性，一般用隔離電源；</li> <li>電路板內的IC或部分電路供電，從性價比和體積出發，優先選用非隔離的方案；</li> <li>對安全有要求的場合，如需接市電的AC-DC，或醫療用的電源，為保證人身的安全，必須用隔離電源，有些場合還必須用加強隔離的電源；</li> <li>對於遠程工業通信的供電，為有效降低地電勢差和導線耦合干擾的影響，一般用隔離電源為每個通信節點單獨供電；</li> <li>對於採用電池供電，對續航力要求嚴苛的場合，採用非隔離供電。</li> </ol>