{"id":28274,"date":"2025-10-10T09:01:52","date_gmt":"2025-10-10T01:01:52","guid":{"rendered":"https:\/\/techclass.wfjydl.com\/?p=28274"},"modified":"2026-09-29T16:17:26","modified_gmt":"2026-09-29T08:17:26","slug":"%e4%bb%80%e4%b9%88%e6%98%af%e6%88%b4%e7%bb%b4%e5%8d%97%e5%ae%9a%e7%90%86%ef%bc%9f-%e7%9b%b4%e6%b5%81%e7%94%b5%e8%b7%af%e7%9a%84%e7%94%b5%e8%b7%af%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/si\/s-si\/10-s-si\/24741","title":{"rendered":"\u4ec0\u4e48\u662f\u6234\u7ef4\u5357\u5b9a\u7406\uff1f\u2014\u76f4\u6d41\u7535\u8def\u7684\u7535\u8def\u5206\u6790"},"content":{"rendered":"\\(\\)\n<p>\u6234\u7ef4\u5357\u5b9a\u7406\uff08Thevenin&#8217;s 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loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-28278\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf1.png\" alt=\"\u6234\u7ef4\u5357\u5b9a\u7406\u6982\u8ff0\" width=\"759\" height=\"427\" \/><\/p>\n<h2 id=\"toc2\">\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u4e3b\u8981\u8981\u7d20<\/h2>\n<p>\u5b66\u4e60\u6234\u7ef4\u5357\u5b9a\u7406\u65f6\uff0c\u7406\u89e3\u6234\u7ef4\u5357\u7535\u538b\uff08\\(V_{Th}\\)\uff09\u548c\u6234\u7ef4\u5357\u7535\u963b\uff08\\(R_{Th}\\)\uff09\u7684\u542b\u4e49\u975e\u5e38\u91cd\u8981\u3002\u8fd9\u4e24\u4e2a\u8981\u7d20\u662f\u201c\u5c06\u590d\u6742\u7684\u7535\u8def\u7b80\u5316\u4e3a\u4e00\u4e2a\u7535\u538b\u6e90\u548c\u4e00\u4e2a\u4e32\u8054\u7535\u963b\u201d\u65f6\u7684\u6838\u5fc3\u90e8\u5206\u3002\u53ea\u8981\u6d4b\u91cf\u5f00\u8def\u7535\u538b\uff0c\u79fb\u9664\u72ec\u7acb\u7535\u6e90\u540e\u8ba1\u7b97\u7b49\u6548\u7535\u963b\uff0c\u5c31\u80fd\u8f7b\u677e\u63a8\u5bfc\u51fa\u6700\u540e\u63a5\u5165\u8d1f\u8f7d\u65f6\u7684\u7535\u6d41\u548c\u7535\u538b\u3002\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u5bf9\u6234\u7ef4\u5357\u7535\u538b\u3001\u6234\u7ef4\u5357\u7535\u963b\u4ee5\u53ca\u542b\u6709\u8d1f\u8f7d\u7535\u963b\u7684\u7535\u8def\u5206\u6790\u8fdb\u884c\u68b3\u7406\u4ecb\u7ecd\u3002<\/p>\n<h3 id=\"toc3\">\u5f00\u8def\u7535\u538b\uff1a\u4ec0\u4e48\u662f\u6234\u7ef4\u5357\u7535\u538b\uff08V<sub>Th<\/sub>\uff09\uff1f<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-28279 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf2.png\" alt=\"\u6234\u7ef4\u5357\u7535\u538b\u7684\u6c42\u89e3\u65b9\u6cd5\" width=\"669\" height=\"376\" \/><\/p>\n<p>\u6234\u7ef4\u5357\u7535\u538b\uff08\\(V_{Th}\\)\uff09\u662f\u6307\u5728\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u7b49\u6548\u7535\u8def\u4e2d\u8868\u5f81\u4e3a\u201c\u4e00\u4e2a\u7535\u538b\u6e90\u201d\u7684\u6570\u503c\u3002\u901a\u5e38\uff0c\u5728\u5c06\u76ee\u6807\u7684\u4e8c\u7aef\u7f51\u7edc\u8bbe\u4e3a\u5f00\u8def\uff08\u79fb\u9664\u8d1f\u8f7d\u7535\u963b\u4f7f\u5176\u4e3a\u65e0\u8d1f\u8f7d\uff09\u7684\u72b6\u6001\u4e0b\uff0c\u901a\u8fc7\u6d4b\u91cf\u6216\u8ba1\u7b97\u4e8c\u7aef\u7f51\u7edc\u95f4\u4ea7\u751f\u7684\u7535\u538b\uff0c\u5373\u53ef\u5f97\u5230\\(V_{Th}\\)\u3002\u4f46\u5f53\u4ec5\u5305\u542b\u53d7\u63a7\u6e90\u65f6\uff0c\u5f00\u8def\u7535\u538b\u53ef\u80fd\u4e3a\u96f6\uff0c\u56e0\u6b64\u9700\u89c6\u60c5\u51b5\u91c7\u7528\u6d4b\u8bd5\u7535\u6e90\u6cd5\u7b49\u65b9\u6cd5\u6765\u6c42\u51fa\u51c6\u786e\u7684\\(V_{Th}\\)\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u79fb\u9664\u8d1f\u8f7d\u7535\u963b\u540e\uff0c\u4e8c\u7aef\u7f51\u7edc\u5f00\u8def\u65f6\u4ea7\u751f\u7684\u5f00\u8def\u7535\u538b\u5373\u4e3a\u6234\u7ef4\u5357\u7535\u538b\u3002\u5176\u6c42\u89e3\u6b65\u9aa4\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<ol class=\"ordered-list\">\n<li>\u79fb\u9664\u8d1f\u8f7d\u7535\u963b\u7b49\u5916\u90e8\u7535\u8def\n<ul>\n<li>\u4fdd\u6301\u4e8c\u7aef\u7f51\u7edc\u4ee5\u5916\u7684\u90e8\u5206\u4e0d\u53d8\uff0c\u79fb\u9664\u76ee\u6807\u8d1f\u8f7d\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5728\u7535\u538b\u548c\u7535\u963b\u4fdd\u6301\u4e0d\u53d8\u7684\u60c5\u51b5\u4e0b\uff0c\u901a\u8fc7\u6b27\u59c6\u5b9a\u5f8b\u6216\u57fa\u5c14\u970d\u592b\u5b9a\u5f8b\u7b49\u8ba1\u7b97\u79fb\u9664\u540e\u4e8c\u7aef\u7f51\u7edc\u7684\u5f00\u8def\u7535\u538b\u3002<\/li>\n<\/ol>\n<p>\u5982\u6b64\uff0c\u5373\u4f7f\u5728\u79fb\u9664\u8d1f\u8f7d\u7684\u72b6\u6001\u4e0b\uff0c\u4e8c\u7aef\u7f51\u7edc\u95f4\u4ea7\u751f\u7684\u7535\u538b\u4ecd\u80fd\u4ee5\\(V_{Th}\\)\u7684\u5f62\u5f0f\u83b7\u5f97\uff0c\u8be5\u503c\u5373\u5bf9\u5e94\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u4e2d\u7684\u201c\u4e00\u4e2a\u7535\u538b\u6e90\u201d\u3002<\/p>\n<p>\u5373\u4f7f\u5728\u591a\u4e2a\u7535\u6e90\u4e32\u8054\u6216\u5e76\u8054\u7684\u7535\u8def\u4e2d\uff0c\u6709\u65f6\u4ec5\u89c2\u5bdf\u76ee\u6807\u7684\u4e8c\u7aef\u7f51\u7edc\u5c31\u80fd\u6d4b\u91cf\u51fa\u6052\u5b9a\u7535\u538b\u3002\u5bf9\u4e8e\u7ebf\u6027\u7535\u8def\uff0c\u53ef\u4ee5\u5229\u7528\u53e0\u52a0\u539f\u7406\u6216\u7b80\u5355\u7684\u5206\u538b\u539f\u7406\u7b49\u8fdb\u884c\u8ba1\u7b97\u3002\u53e6\u5916\uff0c\u901a\u8fc7\u9075\u5faa\u201c\u5bfb\u627e\u5f00\u8def\u7535\u538b\u201d\u8fd9\u79cd\u76f4\u63a5\u7684\u65b9\u6cd5\uff0c\u5373\u4f7f\u539f\u59cb\u7535\u8def\u590d\u6742\uff0c\u4e5f\u4f1a\u53d8\u5f97\u66f4\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n<h3 id=\"toc4\">\u6234\u7ef4\u5357\u7535\u963b\uff08RTh\uff09\u7684\u6c42\u89e3\u65b9\u6cd5<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-28280\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf3.png\" alt=\"\u6234\u7ef4\u5357\u7535\u963b\u7684\u6c42\u89e3\u65b9\u6cd5\" width=\"596\" height=\"335\" \/><\/p>\n<p>\u6234\u7ef4\u5357\u7535\u963b\uff08\\(R_{Th}\\)\uff09\u662f\u4e0e\u6234\u7ef4\u5357\u7535\u538b\uff08\\(V_{Th}\\)\uff09\u540c\u7b49\u91cd\u8981\u7684\u53c2\u6570\uff0c\u5b83\u6982\u62ec\u4e86\u4ece\u5916\u90e8\u770b\u5230\u7684\u7535\u8def\u4e2d\u7684\u7535\u963b\u5206\u91cf\u3002\u5982\u679c\u53ea\u6709\u72ec\u7acb\u7535\u6e90\uff0c\u5219\u53ea\u9700\u5c06\u201c\u7406\u60f3\u7535\u538b\u6e90\u89c6\u4e3a\u77ed\u8def\uff0c\u7406\u60f3\u7535\u6d41\u6e90\u89c6\u4e3a\u5f00\u8def\u201d\uff0c\u518d\u5c06\u5269\u4f59\u7535\u963b\u8fdb\u884c\u4e32\u5e76\u8054\u5408\u6210\u5373\u53ef\u6c42\u5f97\u3002\u4f46\u662f\uff0c\u5f53\u7535\u8def\u4e2d\u53ea\u5305\u542b\u53d7\u63a7\u6e90\u65f6\uff0c\u5219\u9700\u8981\u5728\u4e8c\u7aef\u7f51\u7edc\u65bd\u52a0\u6d4b\u8bd5\u7535\u6e90\uff0c\u518d\u6839\u636e\u5176\u7535\u538b\u548c\u7535\u6d41\u7684\u6bd4\u503c\u63a8\u5bfc\u51fa\\(R_{Th}\\)\u3002<br \/>\n\u6362\u53e5\u8bdd\u8bf4\uff0c\\(R_{Th}\\)\u6982\u62ec\u4e86\u7535\u8def\u5185\u90e8\u7535\u963b\u5143\u4ef6\u7684\u8fde\u63a5\u65b9\u5f0f\uff0c\u8868\u5f81\u4ece\u5916\u90e8\u7aef\u53e3\u770b\u53bb\u65f6\u7684\u7b49\u6548\u7535\u963b\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u57fa\u4e8e\u4e00\u822c\u7ebf\u6027\u7535\u8def\u7406\u8bba\u7684\u5178\u578b\u6b65\u9aa4\uff0c\\(R_{Th}\\)\u7535\u8def\u7406\u8bba\u7684\u6807\u51c6\u601d\u8def\u5982\u4e0b\uff1a<\/p>\n<ol class=\"ordered-list\">\n<li>\u79fb\u9664\u72ec\u7acb\u7535\u6e90\n<ul>\n<li>\u7406\u60f3\u7535\u538b\u6e90 \u2192 \u77ed\u8def\uff08short\uff09<\/li>\n<li>\u7406\u60f3\u7535\u6d41\u6e90 \u2192 \u5f00\u8def\uff08open\uff09<br \/>\n\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u5c06\u7535\u8def\u8f6c\u6362\u4e3a\u72ec\u7acb\u7535\u6e90\u5bf9\u7535\u963b\u503c\u6ca1\u6709\u5f71\u54cd\u7684\u5f62\u5f0f\u3002<br \/>\n\u4f46\u82e5\u5b58\u5728\u53d7\u63a7\u6e90\uff08\u5982\u7535\u538b\u63a7\u5236\u548c\u7535\u6d41\u63a7\u5236\u7b49\uff09\uff0c\u5219\u9700\u4fdd\u7559\u539f\u6837\uff0c\u5e76\u91c7\u7528\u6d4b\u8bd5\u7535\u6e90\u6cd5\uff08\u4f8b\u5982\uff1a\u63a5\u5165\u6d4b\u8bd5\u7535\u538b\u6e90\u540e\u6d4b\u91cf\u6d41\u8fc7\u7684\u7535\u6d41\uff0c\u518d\u901a\u8fc7\u516c\u5f0f\\(R = V \/ I\\)\u8ba1\u7b97\uff09\u7b49\u65b9\u6cd5\u6765\u63a8\u5bfc\u51fa\u7535\u963b\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u786e\u5b9a\u4e8c\u7aef\u7f51\u7edc\u95f4\u5448\u73b0\u7684\u7535\u963b\u503c\n<ul>\n<li>\u901a\u5e38\u91c7\u7528\u4e32\u5e76\u8054\u7b49\u65b9\u5f0f\u5bf9\u7535\u8def\u4e2d\u5269\u4f59\u7684\u7535\u963b\u5143\u4ef6\u8fdb\u884c\u5408\u6210\u540e\u8ba1\u7b97\u3002<\/li>\n<li>\u5f53\u5305\u542b\u53d7\u63a7\u6e90\u65f6\uff0c\u5219\u9700\u4f7f\u7528\u6d4b\u8bd5\u7535\u6e90\u6cd5\u7b49\u65b9\u6cd5\uff0c\u6765\u786e\u5b9a\u4e8c\u7aef\u7f51\u7edc\u95f4\u7684\u7b49\u6548\u7535\u963b\\(R_{Th}\\)\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u7531\u6b64\u6c42\u5f97\u7684\\(R_{Th}\\)\u53ef\u79f0\u4e3a\u662f\u5c06\u7535\u8def\u4e2d\u6240\u6709\u7535\u963b\u4ee5\u4f55\u79cd\u65b9\u5f0f\u7ec4\u5408\u4ee5\u53ca\u5982\u4f55\u5bf9\u5916\u90e8\u5448\u73b0\u8fdb\u884c\u6574\u5408\u540e\u7684\u6570\u503c\u3002\u5373\u4f7f\u7535\u8def\u5185\u90e8\u5f88\u590d\u6742\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5c06\u7406\u60f3\u7535\u538b\u6e90\u89c6\u4e3a\u77ed\u8def\u7b49\u6b65\u9aa4\u5c06\u5176\u7b80\u5316\u4e3a\u7b80\u6d01\u7684\u4e32\u8054\u6216\u5e76\u8054\u5f62\u5f0f\u3002\u6700\u7ec8\uff0c\u6211\u4eec\u4ec5\u9700\u901a\u8fc7\u4e00\u4e2a\\(R_{Th}\\)\u7535\u963b\u503c\uff0c\u5c31\u80fd\u6982\u62ec\u6574\u4e2a\u7535\u8def\u4e2d\u7684\u7535\u963b\u7ec4\u5408\u3002<\/p>\n<h3 id=\"toc5\">\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u4e2d\u7535\u6d41\u548c\u7535\u538b\u7684\u6c42\u89e3\u65b9\u6cd5\uff08\u8fde\u63a5\u8d1f\u8f7d\u65f6\uff09<\/h3>\n<p>\u4e00\u65e6\u83b7\u5f97\u4e86\\(V_{Th}\\)\u548c\\(R_{Th}\\)\uff0c\u53ea\u9700\u5c06\u5176\u89c6\u4e3a\u4e0e\u8d1f\u8f7d\u7535\u963b\uff08\\(R_L\\)\uff09\u7684\u4e32\u8054\u7535\u8def\u7b80\u5355\u5904\u7406\u5373\u53ef\uff0c\u4ece\u800c\u4f7f\u6574\u4e2a\u7535\u8def\u7684\u5206\u6790\u53d8\u5f97\u5341\u5206\u8f7b\u677e\u3002\u901a\u5e38\u53ef\u4ee5\u7528\u4ee5\u4e0b\u516c\u5f0f\u8868\u793a\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(I_L=\\displaystyle \\frac{V_{Th}}{R_{Th}+R_L}\\)<\/span><\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_L=I_L\u00d7R_L\\)<\/span><\/p>\n<p>\u8fd9\u91cc\u7684\\(I_L\\)\u662f\u6d41\u8fc7\u8d1f\u8f7d\u7535\u963b\u7684\u7535\u6d41\uff0c\\(V_L\\)\u662f\u65bd\u52a0\u5728\u8d1f\u8f7d\u7535\u963b\u4e0a\u7684\u7535\u538b\u3002\u5373\u4f7f\u539f\u59cb\u7535\u8def\u5f88\u590d\u6742\uff0c\uff08\u53ea\u8981\u662f\u7ebf\u6027\u7535\u8def\uff09\u5728\u786e\u5b9a\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u7684\\(V_{Th}\\)\u548c\\(R_{Th}\\)\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u50cf\u4e0a\u9762\u8fd9\u6837\u975e\u5e38\u8f7b\u677e\u5730\u6c42\u51fa\u8d1f\u8f7d\u7684\u7535\u6d41\u548c\u7535\u538b\u3002\u8fd9\u4e0d\u4ec5\u51cf\u8f7b\u4e86\u8ba1\u7b97\u8d1f\u62c5\uff0c\u800c\u4e14\u56e0\u5176\u53ef\u88ab\u89c6\u4e3a\u201c\u4e00\u4e2a\u5927\u7535\u6e90+\u4e00\u4e2a\u7535\u963b\u201d\uff0c\u4ece\u800c\u66f4\u6613\u4e8e\u7406\u89e3\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-28281 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf4.png\" alt=\"\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u4e2d\u7535\u6d41\u548c\u7535\u538b\u7684\u6c42\u89e3\u65b9\u6cd5\" width=\"619\" height=\"348\" \/><\/p>\n<h2 id=\"toc6\">\u8fd0\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u5206\u6790\u7684\u6b65\u9aa4<\/h2>\n<p>\u5728\u5b9e\u9645\u7535\u8def\u4e2d\u5e94\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u65f6\uff0c\u6b63\u786e\u9075\u5faa\u57fa\u672c\u6b65\u9aa4\u975e\u5e38\u91cd\u8981\u3002\u9996\u5148\u8981\u786e\u5b9a\u5c06\u54ea\u4e2a\u4e8c\u7aef\u7f51\u7edc\u65ad\u5f00\u4f5c\u4e3a\u5206\u6790\u5bf9\u8c61\uff0c\u7136\u540e\u4e86\u89e3\u6c42\u53d6\u8be5\u4e8c\u7aef\u7f51\u7edc\u5f00\u8def\u7535\u538b\uff08\u6234\u7ef4\u5357\u7535\u538b\uff09\u548c\u7b49\u6548\u7535\u963b\uff08\u6234\u7ef4\u5357\u7535\u963b\uff09\u7684\u6b65\u9aa4\uff0c\u8fd9\u6837\u5373\u4f7f\u770b\u4f3c\u590d\u6742\u7684\u76f4\u6d41\u7535\u8def\u5206\u6790\u4e5f\u4f1a\u53d8\u5f97\u683c\u5916\u6e05\u6670\u6613\u61c2\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u6839\u636e\u7535\u8def\u7ed3\u6784\u548c\u7aef\u53e3\u7684\u9009\u62e9\u65b9\u5f0f\uff0c\u5177\u4f53\u7684\u5206\u6790\u6b65\u9aa4\u53ef\u80fd\u4f1a\u6709\u6240\u4e0d\u540c\u3002\u4f8b\u5982\uff0c\u6839\u636e\u53d7\u63a7\u6e90\u7684\u5904\u7406\u65b9\u6cd5\u4ee5\u53ca\u5982\u4f55\u5c06\u7535\u8def\u7279\u5b9a\u90e8\u5206\u201c\u9690\u5f62\u201d\u7b49\uff0c\u5f00\u8def\u7535\u538b\u548c\u7b49\u6548\u7535\u963b\u7684\u8ba1\u7b97\u6b65\u9aa4\u53ef\u80fd\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u56e0\u6b64\u4e0d\u80fd\u4e00\u6982\u800c\u8bba\u5730\u65ad\u8a00\u201c\u65e0\u8bba\u9009\u62e9\u54ea\u4e2a\u7aef\u53e3\uff0c\u6b65\u9aa4\u90fd\u5b8c\u5168\u76f8\u540c\u201d\u3002<br \/>\n\u5c3d\u7ba1\u5982\u6b64\uff0c\u6234\u7ef4\u5357\u5b9a\u7406\u6240\u63ed\u793a\u7684\u6838\u5fc3\u6b65\u9aa4\u662f\u4e0d\u53d8\u7684\u3002<\/p>\n<ul class=\"unordered-list noindent\">\n<li>\u8ba1\u7b97\u4e8c\u7aef\u7f51\u7edc\u5f00\u8def\u65f6\u7684\u7535\u538b\uff08\u6234\u7ef4\u5357\u7535\u538b\uff09<\/li>\n<li>\u5982\u679c\u542b\u6709\u72ec\u7acb\u7535\u6e90\uff0c\u5219\u5c06\u7406\u60f3\u7535\u538b\u6e90\u77ed\u8def\uff0c\u5e76\u5c06\u7406\u60f3\u7535\u6d41\u6e90\u5f00\u8def\uff0c\u6c42\u51fa\u4e8c\u7aef\u7f51\u7edc\u7684\u7b49\u6548\u7535\u963b\uff08\u6234\u7ef4\u5357\u7535\u963b\uff09<\/li>\n<li>\u5982\u679c\u5305\u542b\u53d7\u63a7\u6e90\uff0c\u5219\u5c06\u5176\u4fdd\u7559\u5728\u7535\u8def\u4e2d\uff0c\u5e76\u4f7f\u7528\u6d4b\u8bd5\u7535\u6e90\u6cd5\u7b49\u65b9\u6cd5\u8ba1\u7b97\u7b49\u6548\u7535\u963b\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u9075\u5faa\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u53ef\u4ee5\u4e86\u89e3\u4ece\u5916\u90e8\u770b\u53bb\u65f6\u7535\u8def\u53ef\u4ee5\u88ab\u7b49\u6548\u4e3a\u600e\u6837\u7684\u5355\u4e00\u7535\u538b\u6e90+\u4e32\u8054\u7535\u963b\u3002<\/p>\n<p>\u4e0b\u9762\uff0c\u6211\u4eec\u901a\u8fc7\u5b9e\u9645\u6b65\u9aa4\u548c\u6570\u503c\u4f8b\u9898\u6765\u4ecb\u7ecd\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u5e94\u7528\u6d41\u7a0b\u3002\u7531\u4e8e\u7aef\u53e3\u7684\u9009\u62e9\u65b9\u5f0f\u4f1a\u6539\u53d8\u5f85\u5206\u6790\u7684\u5b50\u7535\u8def\uff0c\u56e0\u6b64\u5728\u8fdb\u884c\u5177\u4f53\u7684\u624b\u52a8\u8ba1\u7b97\u6216\u4eff\u771f\u65f6\uff0c\u8bf7\u4ed4\u7ec6\u8ffd\u8e2a\u6bcf\u4e2a\u6b65\u9aa4\u7684\u7535\u8def\u53d8\u5316\u3002<\/p>\n<h3 id=\"toc7\">\u7ebf\u6027\u7535\u8def\u65f6\u7684\u524d\u63d0\u548c\u8981\u70b9<\/h3>\n<p>\u6234\u7ef4\u5357\u5b9a\u7406\u5728\u7406\u8bba\u4e0a\u9002\u7528\u4e8e\u201c\u4e0d\u5305\u542b\u975e\u7ebf\u6027\u5143\u4ef6\uff08\u6216\u5373\u4f7f\u5305\u542b\u4e5f\u4ec5\u9650\u4e8e\u7ebf\u6027\u5de5\u4f5c\u533a\uff09\u7684\u7535\u8def\u201d\u3002\u56e0\u6b64\uff0c\u4e25\u683c\u6765\u8bf4\u4e0d\u80fd\u9002\u7528\u4e8e\u5305\u542b\u4e8c\u6781\u7ba1\u548c\u6676\u4f53\u7ba1\u7b49\u975e\u7ebf\u6027\u5143\u4ef6\u7684\u7535\u8def\u3002\u4f46\u662f\uff0c\u5728\u4e00\u4e9b\u5de5\u7a0b\u5b9e\u8df5\u548c\u5206\u6790\u4e2d\uff0c\u6709\u65f6\u4f1a\u201c\u5728\u5de5\u4f5c\u70b9\u9644\u8fd1\u901a\u8fc7\u5c0f\u4fe1\u53f7\u6a21\u578b\u8fdb\u884c\u7ebf\u6027\u5316\u201d\uff0c\u4ece\u800c\u8fd1\u4f3c\u5730\u5e94\u7528\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u3002\u7136\u800c\uff0c\u8fd9\u662f\u8d85\u51fa\u539f\u7406\u9002\u7528\u8303\u56f4\u7684\u201c\u8fd1\u4f3c\u201d\uff0c\u5e76\u975e\u8868\u793a\u6234\u7ef4\u5357\u5b9a\u7406\u672c\u8eab\u53ef\u4ee5\u76f4\u63a5\u9002\u7528\u4e8e\u975e\u7ebf\u6027\u7535\u8def\u3002<\/p>\n<p>\u5bf9\u4e8e\u76f4\u6d41\u7535\u8def\uff0c\u7ebf\u5708\u548c\u7535\u5bb9\u5668\u5728\u7a33\u6001\u4e0b\u5e38\u88ab\u89c6\u4e3a\u77ed\u8def\u6216\u5f00\u8def\uff0c\u8fd9\u4f7f\u5f97\u6234\u7ef4\u5357\u5b9a\u7406\u66f4\u5bb9\u6613\u5e94\u7528\u3002\u4f8b\u5982\uff0c\u5728\u7a33\u6001\u4e0b\uff0c\u7535\u5bb9\u5668\u53ef\u89c6\u4e3a\u5f00\u8def\uff0c\u7ebf\u5708\u53ef\u89c6\u4e3a\u5bfc\u7ebf\uff0c\u6b64\u65f6\u53ea\u9700\u5173\u6ce8\u7535\u963b\u548c\u7535\u6e90\uff0c\u4ece\u800c\u4f7f\u5206\u6790\u6b65\u9aa4\u66f4\u6613\u4e8e\u68b3\u7406\u3002\u4f46\u662f\uff0c\u5f53\u9700\u8981\u8003\u8651\u77ac\u6001\u73b0\u8c61\u6216\u4ea4\u6d41\u5206\u91cf\u65f6\uff0c\u9700\u8981\u7406\u89e3\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u9002\u7528\u8303\u56f4\u3002<\/p>\n<h3 id=\"toc8\">\u6234\u7ef4\u5357\u5b9a\u7406\u5206\u6790\u6b65\u9aa4\u603b\u7ed3<\/h3>\n<p>\u5728\u6234\u7ef4\u5357\u5b9a\u7406\u4e2d\uff0c\u4efb\u610f\u7ebf\u6027\u7535\u8def\u5747\u53ef\u66ff\u6362\u4e3a\u201c\u6234\u7ef4\u5357\u7535\u538b\uff08\\(V_{Th}\\)\uff09\u201d\u548c\u201c\u6234\u7ef4\u5357\u7535\u963b\uff08\\(R_{Th}\\)\uff09\u201d\u7684\u4e32\u8054\u8fde\u63a5\u3002\u8fd9\u6837\uff0c\u5373\u4f7f\u7535\u8def\u5f88\u590d\u6742\uff0c\u4e5f\u80fd\u8f7b\u677e\u5904\u7406\u4ece\u5916\u90e8\u770b\u53bb\u7684\u7535\u538b\u548c\u7535\u6d41\u7279\u6027\u3002<\/p>\n<p>\u6807\u51c6\u7684\u5206\u6790\u6d41\u7a0b\u5982\u4e0b\u6240\u793a\uff0c\u4f46\u8bf7\u6ce8\u610f\uff0c\u5982\u679c\u7535\u8def\u4e2d\u5305\u542b\u53d7\u63a7\u6e90\u6216\u5177\u6709\u7279\u6b8a\u7684\u7535\u8def\u7ed3\u6784\u65f6\uff0c\u53ef\u80fd\u65e0\u6cd5\u76f4\u63a5\u5e94\u7528\u4ee5\u4e0b\u6b65\u9aa4\u3002<\/p>\n<ol class=\"ordered-list\">\n<li>\u786e\u5b9a\u7535\u8def\u7684\u4e8c\u7aef\u7f51\u7edc\n<ul>\n<li>\u660e\u786e\u9700\u8981\u7b49\u6548\u66ff\u6362\u7684\u76ee\u6807\uff0c\u4f8b\u5982\u8d1f\u8f7d\u6216\u6d4b\u91cf\u5bf9\u8c61\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u79fb\u9664\u8d1f\u8f7d\uff0c\u6c42\u53d6\u4e8c\u7aef\u7f51\u7edc\u7684\u5f00\u8def\u7535\u538b\uff08\\(VOC\\)\uff09\n<ul>\n<li>\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u8be5\u5f00\u8def\u7535\u538b\u5373\u4e3a\u6234\u7ef4\u5357\u7535\u538b\uff08\\(V_{Th}\\)\uff09\u3002<\/li>\n<li>\u4f46\u662f\uff0c\u6839\u636e\u53d7\u63a7\u6e90\u6216\u7535\u8def\u7ed3\u6784\u7684\u4e0d\u540c\uff0c\u4ec5\u901a\u8fc7\u7b80\u5355\u5730\u79fb\u9664\u8d1f\u8f7d\u53ef\u80fd\u65e0\u6cd5\u51c6\u786e\u8ba1\u7b97\u51fa\\(V_{Th}\\)\u3002\u5fc5\u8981\u65f6\u9700\u91c7\u53d6\u63d2\u5165\u6d4b\u8bd5\u7535\u6e90\u5e76\u8ba1\u7b97\u7535\u538b\u548c\u7535\u6d41\u7b49\u9644\u52a0\u6b65\u9aa4\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u79fb\u9664\u7535\u8def\u4e2d\u7684\u72ec\u7acb\u7535\u6e90\uff0c\u6c42\u53d6\u4e8c\u7aef\u7f51\u7edc\u7684\u7b49\u6548\u7535\u963b\uff08\\(R_{Th}\\)\uff09\n<ul>\n<li>\u7406\u60f3\u7535\u538b\u6e90\u2192\u77ed\u8def\uff08\u89c6\u4e3a\u77ed\u8def\uff09<\/li>\n<li>\u7406\u60f3\u7535\u6d41\u6e90\u2192\u5f00\u8def\uff08\u89c6\u4e3a\u5f00\u8def\uff09<\/li>\n<li>\u6709\u53d7\u63a7\u6e90\u65f6\uff0c\u5c06\u5176\u4fdd\u7559\uff0c\u5e76\u4f7f\u7528\u6d4b\u8bd5\u7535\u6e90\u6cd5\u7b49\u65b9\u6cd5\u8ba1\u7b97\u7535\u963b\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5c06\u6c42\u5f97\u7684\\(V_{Th}\\)\u548c\\(R_{Th}\\)\u7ed8\u5236\u4e3a\u4e32\u8054\u7684\u7b49\u6548\u7535\u8def\n<ul>\n<li>\u6b64\u65f6\uff0c\u4ece\u5916\u90e8\u770b\u53bb\u7684\u7535\u8def\u53ef\u4ee5\u89c6\u4e3a\u201c\u7406\u60f3\u7535\u538b\u6e90\\(V_{Th}\\)\u201d\u548c\u201c\u7535\u963b\\(R_{Th}\\)\u201d\u7ec4\u6210\u7684\u4e32\u8054\u7535\u8def\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u91cd\u65b0\u63a5\u5165\u5df2\u79fb\u9664\u7684\u8d1f\u8f7d\u7535\u963b\uff08\\(R_L\\)\uff09\uff0c\u5e76\u4f5c\u4e3a\u7b80\u5355\u7684\u4e32\u8054\u7535\u8def\u8fdb\u884c\u8ba1\u7b97\n<ul>\n<li>\u968f\u540e\u8fdb\u884c\u5e38\u89c4\u7684\u4e32\u8054\u7535\u8def\u5206\u6790\uff0c\u6c42\u51fa\u7535\u6d41\u548c\u7aef\u53e3\u7535\u538b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-28282 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf5.png\" alt=\"\u8fd0\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u5206\u6790\u7684\u6b65\u9aa4\" width=\"695\" height=\"391\" \/><\/p>\n<p>\u8981\u70b9\u548c\u6ce8\u610f\u4e8b\u9879<\/p>\n<ul class=\"unordered-list\">\n<li>\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5f00\u8def\u7535\u538b\u76f4\u63a5\u6210\u4e3a\u6234\u7ef4\u5357\u7535\u538b\n<ul>\n<li>\u5982\u679c\u7535\u8def\u4ec5\u7531\u72ec\u7acb\u7535\u6e90\u7ec4\u6210\uff0c\u5219\u79fb\u9664\u8d1f\u8f7d\u65f6\u7684\u7aef\u53e3\u7535\u538b\uff08\\(VOC\\)\uff09\u5373\u4e3a\u6234\u7ef4\u5357\u7535\u538b\uff08\\(V_{Th}\\)\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5b58\u5728\u53d7\u63a7\u6e90\u6216\u7279\u6b8a\u7535\u8def\u65f6\u7684\u6ce8\u610f\u4e8b\u9879\n<ul>\n<li>\u6839\u636e\u7535\u8def\u7684\u4e0d\u540c\uff0c\u6709\u65f6\u4e0d\u80fd\u7b80\u5355\u5730\u5c06\u8d1f\u8f7d\u79fb\u9664\u72b6\u6001\u4e0b\u7684\u7535\u538b\u89c6\u4e3a\\(V_{Th}\\)\u3002<\/li>\n<li>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u5728\u7aef\u53e3\u4e0a\u63a5\u5165\u6d4b\u8bd5\u7535\u6e90\u6765\u5206\u6790\u7535\u6d41\u548c\u7535\u538b\uff0c\u4ee5\u51c6\u786e\u8ba1\u7b97\u51fa\\(V_{Th}\\)\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u7535\u963b\u7684\u5408\u6210\uff08\\(R_{Th}\\)\uff09\n<ul>\n<li>\u79fb\u9664\u72ec\u7acb\u7535\u6e90\uff08\u5c06\u7535\u538b\u6e90\u89c6\u4e3a\u77ed\u8def\uff0c\u7535\u6d41\u6e90\u89c6\u4e3a\u5f00\u8def\uff09\u540e\uff0c\u5c06\u5269\u4f59\u7684\u7535\u963b\u8fdb\u884c\u4e32\u5e76\u8054\u5408\u6210\u6765\u6c42\u53d6\u3002<\/li>\n<li>\u542b\u6709\u53d7\u63a7\u6e90\u65f6\u901a\u5e38\u91c7\u7528\u6d4b\u8bd5\u7535\u6e90\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u51c6\u786e\u9075\u5faa\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u53ef\u4ee5\u83b7\u5f97\u57fa\u4e8e\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u7b49\u6548\u7535\u8def\u3002\u9700\u8981\u7279\u522b\u6ce8\u610f\u7684\u662f\uff0c\u6839\u636e\u7535\u8def\u7279\u6027\u7684\u4e0d\u540c\uff0c\u53ef\u80fd\u5b58\u5728\u5f00\u8def\u7535\u538b\u4e0d\u76f4\u63a5\u7b49\u540c\u4e8e\u6234\u7ef4\u5357\u7535\u538b\u7684\u60c5\u51b5\uff0c\u56e0\u6b64\u9700\u6839\u636e\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u6765\u6c42\u51fa\\(V_{Th}\\)\u548c\\(R_{Th}\\)\u3002<\/p>\n<h3 id=\"toc9\">\u542b\u6709\u591a\u7535\u963b\u7684\u5177\u4f53\u5b9e\u4f8b<\/h3>\n<p>\u8fd9\u91cc\u6211\u4eec\u5c06\u4ee5\u4e00\u4e2a\u5177\u4f53\u7684\u76f4\u6d41\u7535\u8def\u5b9e\u4f8b\u6765\u6f14\u793a\u5982\u4f55\u5e94\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u8fdb\u884c\u7b80\u5316\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u7535\u8def\u8bbe\u7f6e\u5982\u4e0b\uff1a<\/p>\n<ul class=\"unordered-list\">\n<li>\u7535\u6e90\uff1a\u76f4\u6d4112V<\/li>\n<li>\u7535\u963b\uff1a\\(R_1\\)=6\u03a9\u3001\\(R_2\\)=3\u03a9\u3001\\(R_3\\)=2\u03a9<\/li>\n<li>\u8fde\u63a5\uff1a\u4ece\u7535\u6e90\u6b63\u6781\u4f9d\u6b21\u7ecf\u8fc7\\(R_1\\)\uff0c\u968f\u540e\\(R_2\\)\u548c\\(R_3\\)\u5e76\u8054\u540e\u8fde\u63a5\u81f3\u5730\u7aef\u3002\u540c\u65f6\uff0c\u5728\u8282\u70b9A\uff08\\(R_1\\)\u8f93\u51fa\u7aef\uff09\u4e0e\u63a5\u5730\u7aef\u4e4b\u95f4\uff0c\u4ee5\u53ef\u79fb\u9664\u7684\u5f62\u5f0f\u8fde\u63a5\u8d1f\u8f7d\u7535\u963b\\(R_L\\)\u3002<\/li>\n<\/ul>\n<p>\u4ec5\u901a\u8fc7\u6587\u5b57\u63cf\u8ff0\u53ef\u80fd\u96be\u4ee5\u5f62\u6210\u76f4\u89c2\u5370\u8c61\uff0c\u4f46\u8981\u70b9\u5728\u4e8e\u8bbe\u60f3\u8fd9\u6837\u4e00\u79cd\u7ed3\u6784\uff0c\u5373\u201c\u5728\\(R_1\\)\u4e4b\u540e\u662f\\(R_2\\)\u548c\\(R_3\\)\u7684\u5e76\u8054\uff0c\u5e76\u5728\u59cb\u7ec8\u8fde\u63a5\u5230\u63a5\u5730\u7aef\u7684\u4f4d\u7f6e\u53ef\u4ee5\u5e76\u8054\u6dfb\u52a0\u8d1f\u8f7d\\(R_L\\)\u201d\u3002<\/p>\n<p>\u6b64\u65f6\uff0c\u82e5\u8981\u8ba1\u7b97\u51fa\u79fb\u9664\u8d1f\u8f7d\\(R_L\\)\u540e\u4e8c\u7aef\u7f51\u7edc\u7684\u5f00\u8def\u7535\u538b\uff08\u8282\u70b9A-GND\u4e4b\u95f4\u7684\u7535\u538b\uff09\uff0c\u7531\u4e8e\u5e76\u8054\u7684\\(R_2\\)\u548c\\(R_3\\)\u8fde\u63a5\u5230\u63a5\u5730\u7aef\uff0c\u56e0\u6b64\u5176\u7535\u6d41\u4e3a\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(I_L=\\displaystyle \\frac{12V}{R_1+(R_2\\|R_3)}\\)<\/span><\/p>\n<p>\u8282\u70b9A\u7684\u7535\u538b\u7531\u5206\u538b\u51b3\u5b9a\u3002\u5b9e\u9645\u7684\u7535\u538b\u8ba1\u7b97\u5982\u4e0b\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(R_2\\|R_3=\\displaystyle \\frac{3\u00d72}{3+2}=1.2\u03a9\\)<\/span><\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(I_L=\\displaystyle \\frac{12}{6+1.2}=\\displaystyle \\frac{12}{7.2}\u22481.6667A\\)<\/span><\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{Th}=I_L\u00d7(R_2\\|R_3)=2.0V\\)<\/span><\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u5c06\u7535\u6e90\u89c6\u4e3a\u77ed\u8def\uff0c\u5728\u8ba1\u7b97\u7b49\u6548\u7535\u963b\u65f6\uff0c\u9700\u786e\u8ba4\\(R_1\\)\u548c\u5e76\u8054\u7684\\(R_2\\),\\(R_3\\)\u7684\u7ec4\u5408\u540e\u518d\u8ba1\u7b97\\(R_{Th}\\)\uff08\u5982\u679c\u6ca1\u6709\u53d7\u63a7\u6e90\uff0c\u901a\u5e38\u53ef\u4ee5\u7528\u4e32\u5e76\u8054\u516c\u5f0f\u8f7b\u677e\u5408\u6210\uff09\u3002<br \/>\n\u5177\u4f53\u8ba1\u7b97\u5982\u4e0b\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(R_{Th}=R_1\\|R_2\\|R_3=1\u03a9\\)<\/span><\/p>\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u53ef\u5f52\u7eb3\u5f97\u51fa\u5982\u4e0b\u6240\u793a\u7684\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\uff1a<\/p>\n<p>\\(V_{Th}\\) = 2V, \\(R_{Th}\\) = 1\u03a9<\/p>\n<p>\u6700\u540e\uff0c\u5c06\u8d1f\u8f7d\\(R_L\\)\u6062\u590d\u539f\u72b6\uff0c\u4f5c\u4e3a\u4e32\u8054\u7535\u8def\uff0c\u901a\u8fc7\u4ee5\u4e0b\u516c\u5f0f\u6c42\u51fa\u7535\u6d41\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(I_L=\\displaystyle \\frac{V_{Th}}{R_{Th}+R_L}=\\displaystyle \\frac{2}{1+R_L}\\)<\/span><\/p>\n<p>\u7531\u6b64\u4fbf\u53ef\u8f7b\u677e\u5f97\u51fa\u6d41\u8fc7\u8d1f\u8f7d\u7535\u963b\u7684\u7535\u6d41\u503c\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-30807\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u3010\u56fe\u7247\u4fee\u6539\u3011\u30c6\u30d6\u30ca\u30f3\u306e\u5b9a\u7406\u3068\u306f\uff08\u4ec0\u4e48\u662f\u6234\u7ef4\u5357\u5b9a\u7406\uff09.png\" alt=\"\" width=\"700\" height=\"394\" \/><\/p>\n<h2 id=\"toc10\">\u6234\u7ef4\u5357\u5b9a\u7406\u548c\u6700\u5927\u529f\u7387\u4f20\u8f93<\/h2>\n<p>\u901a\u8fc7\u6234\u7ef4\u5357\u5b9a\u7406\u83b7\u5f97\u7b49\u6548\u7535\u8def\u540e\uff0c\u5f80\u5f80\u4f1a\u4ea7\u751f\u201c\u5e0c\u671b\u5c06\u53ef\u63d0\u4f9b\u7ed9\u8d1f\u8f7d\u7684\u529f\u7387\u5b9e\u73b0\u6700\u5927\u5316\u201d\u7684\u60f3\u6cd5\uff0c\u8fd9\u5c31\u662f\u6700\u5927\u529f\u7387\u4f20\u8f93\u5b9a\u7406\uff0c\u5e38\u4e0e\u6234\u7ef4\u5357\u5b9a\u7406\u5e76\u5217\u8ba8\u8bba\u3002\u8fd9\u4e0d\u4ec5\u51cf\u8f7b\u4e86\u8ba1\u7b97\u8d1f\u62c5\uff0c\u800c\u4e14\u56e0\u5176\u53ef\u88ab\u89c6\u4e3a\u201c\u4e00\u4e2a\u5927\u7535\u6e90+\u4e00\u4e2a\u7535\u963b\u201d\uff0c\u4ece\u800c\u66f4\u6613\u4e8e\u76f4\u89c2\u7406\u89e3\u3002\u53e6\u5916\uff0c\u8fd9\u8fd8\u5f15\u51fa\u4e86\u4e00\u4e2a\u91cd\u8981\u7684\u8bbe\u8ba1\u51c6\u5219\uff1a\u5f53\u8d1f\u8f7d\u7535\u963b\u8bbe\u7f6e\u4e3a\u7b49\u4e8e\\(R_{Th}\\)\u65f6\uff0c\u8d1f\u8f7d\u529f\u7387\u8fbe\u5230\u6700\u5927\uff08\u6700\u5927\u529f\u7387\u4f20\u8f93\uff09\u3002<\/p>\n<h3 id=\"toc11\">\u6700\u5927\u529f\u7387\u4f20\u8f93\u6982\u8ff0<\/h3>\n<p>\u6700\u5927\u529f\u7387\u4f20\u8f93\u5b9a\u7406\u662f\u6307\uff0c\u5f53\u8d1f\u8f7d\u7535\u963b\\(R_L\\)\u7b49\u4e8e\u6234\u7ef4\u5357\u7535\u963b\\(R_{Th}\\)\u65f6\uff0c\u8d1f\u8f7d\u83b7\u5f97\u7684\u529f\u7387\u8fbe\u5230\u6700\u5927\u3002\u56de\u60f3\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u53ef\u77e5\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(P_L=I_L^2 R_L=\\left(\\displaystyle \\frac{V_{Th}}{R_{Th}+R_L}\\right)^2 R_L\\)<\/span><\/p>\n<p>\u4e0a\u8ff0\u516c\u5f0f\u6700\u5927\u5316\u7684\u6761\u4ef6\u4e3a\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(R_L=R_{Th}\\)<\/span><\/p>\n<p>\u8fd9\u4e0e\u97f3\u9891\u653e\u5927\u5668\u6216\u5929\u7ebf\u8bbe\u8ba1\u7b49\u9886\u57df\u4e2d\u7684\u7406\u5ff5\u606f\u606f\u76f8\u5173\uff0c\u5373\u5982\u679c\u8d1f\u8f7d\u548c\u5185\u90e8\u7535\u963b\u76f8\u7b49\uff0c\u529f\u7387\u5c31\u80fd\u6709\u6548\u5730\u4f20\u8f93\u5230\u8d1f\u8f7d\u7aef\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-28284 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf7.png\" alt=\"\u6234\u7ef4\u5357\u5b9a\u7406\u548c\u6700\u5927\u529f\u7387\u4f20\u8f93\" width=\"635\" height=\"357\" \/><\/p>\n<h3 id=\"toc12\">\u5b9e\u9645\u5e94\u7528\u548c\u6ce8\u610f\u4e8b\u9879<\/h3>\n<p>\u5f53\u8ffd\u6c42\u6700\u5927\u529f\u7387\u4f20\u8f93\u65f6\uff0c\u867d\u7136\u53ef\u4ee5\u589e\u5927\u8d1f\u8f7d\u7aef\u7684\u529f\u7387\uff0c\u4f46\u6574\u4e2a\u7535\u8def\u7684\u7535\u6d41\u548c\u529f\u8017\u4e5f\u4f1a\u589e\u52a0\u3002\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d\uff0c\u9700\u8981\u7efc\u5408\u8003\u8651\u6761\u4ef6\u3001\u6548\u7387\u3001\u70ed\u8bbe\u8ba1\u4ee5\u53ca\u5143\u5668\u4ef6\u7684\u5bb9\u8bb8\u8303\u56f4\u6765\u8bc4\u4f30\u662f\u5426\u8981\u91c7\u7528\u7406\u60f3\u7684\\(R_{Th}\\) = \\(R_L\\)\u3002\u7136\u800c\uff0c\u5728\u7406\u89e3\u7535\u8def\u7406\u8bba\u65f6\uff0c\u8be5\u5b9a\u7406\u5bf9\u4e8e\u4e86\u89e3\u6234\u7ef4\u5357\u7535\u963b\u5982\u4f55\u5f71\u54cd\u8d1f\u8f7d\u7aef\u662f\u975e\u5e38\u6709\u7528\u7684\u3002<\/p>\n<h2 id=\"toc13\">\u6234\u7ef4\u5357\u5b9a\u7406\u4e0e\u5176\u4ed6\u7535\u8def\u7406\u8bba\u7684\u5173\u7cfb<\/h2>\n<p>\u7eb5\u89c2\u7535\u8def\u7406\u8bba\uff0c\u6234\u7ef4\u5357\u5b9a\u7406\u7edd\u975e\u5b64\u7acb\u7684\u5b58\u5728\u3002\u8bfa\u987f\u5b9a\u7406\u4e0e\u6234\u7ef4\u5357\u5b9a\u7406\u4e92\u4e3a\u5bf9\u5076\u5173\u7cfb\uff0c\u4e8c\u8005\u5e38\u4e0e\u53e0\u52a0\u539f\u7406\u548c\u57fa\u5c14\u970d\u592b\u5b9a\u5f8b\uff08KCL\u548cKVL\uff09\u7b49\u57fa\u672c\u539f\u7406\u7ed3\u5408\u4f7f\u7528\u3002\u672c\u8282\u6211\u4eec\u5c06\u63a2\u7a76\u6234\u7ef4\u5357\u5b9a\u7406\u4e0e\u5176\u4ed6\u4ee3\u8868\u6027\u7406\u8bba\u4e4b\u95f4\u7684\u5173\u8054\u6027\u3002<\/p>\n<h3 id=\"toc14\">\u8bfa\u987f\u5b9a\u7406<\/h3>\n<p>\u8bfa\u987f\u5b9a\u7406\u4e3b\u5f20\u201c\u4efb\u4f55\u7ebf\u6027\u7535\u8def\u90fd\u53ef\u4ee5\u7528\u4e00\u4e2a\u7535\u6d41\u6e90\u548c\u4e00\u4e2a\u5e76\u8054\u7535\u963b\u6765\u7b49\u6548\u8868\u793a\u201d\u3002\u4e0e\u6234\u7ef4\u5357\u7684\u201c\u7535\u538b\u6e90+\u4e32\u8054\u7535\u963b\u201d\u76f8\u5bf9\u5e94\uff0c\u8bfa\u987f\u91c7\u7528\u7684\u662f\u201c\u7535\u6d41\u6e90+\u5e76\u8054\u7535\u963b\u201d\u3002\u8fd9\u4e24\u4e2a\u5b9a\u7406\u53ef\u4ee5\u901a\u8fc7\u4e0b\u5f0f\u8868\u793a\u7684\u5173\u7cfb\u5b9e\u73b0\u76f8\u4e92\u8f6c\u6362\u3002<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(I_N=\\displaystyle \\frac{V_{Th}}{R_{Th}}\\)<\/span><\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u5df2\u77e5\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u7684\\(V_{Th}\\)\u548c\\(R_{Th}\\)\uff0c\u5c31\u53ef\u4ee5\u5c06\u7535\u6e90\u66ff\u6362\u4e3a\u7535\u6d41\u6e90\\(I_N\\)\uff0c\u5e76\u8f6c\u6362\u4e3a\u4e0e\\(R_{Th}\\)\u5e76\u8054\u8fde\u63a5\u7684\u5f62\u5f0f\u3002\u5176\u4e2d\u54ea\u79cd\u5f62\u5f0f\u66f4\u5bb9\u6613\u5904\u7406\uff0c\u53d6\u51b3\u4e8e\u7535\u8def\u7684\u5206\u652f\u65b9\u6cd5\u548c\u8bbe\u8ba1\u8005\u7684\u504f\u597d\u3002<\/p>\n<h3 id=\"toc15\">\u8f6c\u6362\u4e3a\u8bfa\u987f\u7b49\u6548\u7535\u8def<\/h3>\n<p>\u5982\u679c\u5df2\u7ecf\u77e5\u9053\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\uff0c\u7531\u6b64\u8f6c\u6362\u5230\u8bfa\u987f\u7b49\u6548\u7535\u8def\u5c06\u975e\u5e38\u7b80\u5355\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u5b58\u5728\u5982\u4e0b\u6240\u793a\u7684\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\uff1a<\/p>\n<p>\\(V_{Th}\\)\u548c\u4e32\u8054\u7684\\(R_{Th}\\)<\/p>\n<p>\u82e5\u8981\u5c06\u5176\u8f6c\u6362\u4e3a\u8bfa\u987f\u5f62\u5f0f\uff08\u7535\u6d41\u6e90\\(I_N\\)\u548c\u5e76\u8054\u7684\\(R_N\\)\uff09\uff0c\u9996\u5148\u9700\u8981\u8ba1\u7b97\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(I_N=\\displaystyle \\frac{V_{Th}}{R_{Th}}\\)<\/span><\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u53ea\u9700\u5c06\u963b\u503c\u4e0e\\(R_{Th}\\)\u76f8\u540c\u7684\u7535\u963b\\(R_N\\)\u4e0e\u7535\u6d41\u6e90\\(I_N\\)\u5e76\u8054\u8fde\u63a5\u5373\u53ef\u5b8c\u6210\u8f6c\u6362\u3002\u5728\u5904\u7406\u591a\u4e2a\u8d1f\u8f7d\u5e76\u8054\u8fde\u63a5\u7684\u7535\u8def\u65f6\uff0c\u91c7\u7528\u8bfa\u987f\u5f62\u5f0f\u53ef\u80fd\u66f4\u5177\u4f18\u52bf\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-28285 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf8.png\" alt=\"\u8f6c\u6362\u4e3a\u8bfa\u987f\u7b49\u6548\u7535\u8def\" width=\"645\" height=\"363\" \/><\/p>\n<h3 id=\"toc16\">\u53e0\u52a0\u539f\u7406\u548c\u57fa\u5c14\u970d\u592b\u5b9a\u5f8b<\/h3>\n<p>\u6234\u7ef4\u5357\u5b9a\u7406\u5728\u7535\u8def\u5206\u6790\u4e2d\u662f\u4e0e\u53e0\u52a0\u539f\u7406\u548c\u57fa\u5c14\u970d\u592b\u5b9a\u5f8b\uff08KCL\u548cKVL\uff09\u7d27\u5bc6\u5173\u8054\u7684\u5206\u6790\u65b9\u6cd5\u3002\u8fd9\u4e9b\u5b9a\u7406\u867d\u7136\u662f\u5404\u81ea\u72ec\u7acb\u7684\u57fa\u672c\u539f\u7406\uff0c\u4f46\u5728\u7535\u8def\u5206\u6790\u4e2d\u5e38\u5e38\u76f8\u4e92\u8865\u5145\uff0c\u4ee5\u4e0d\u53ef\u5206\u5272\u7684\u5f62\u5f0f\u88ab\u7efc\u5408\u8fd0\u7528\u3002<\/p>\n<ul class=\"unordered-list\">\n<li>\u53e0\u52a0\u539f\u7406<br \/>\n\u5229\u7528\u5c06\u591a\u4e2a\u72ec\u7acb\u7535\u6e90\u5206\u522b\u5355\u72ec\u4f5c\u7528\u65f6\u7684\u54cd\u5e94\u53e0\u52a0\u8d77\u6765\uff0c\u5373\u53ef\u83b7\u5f97\u7535\u8def\u6574\u4f53\u54cd\u5e94\u7684\u7ebf\u6027\u7535\u8def\u7279\u6709\u6027\u8d28\u3002<\/li>\n<li>\u57fa\u5c14\u970d\u592b\u5b9a\u5f8b\uff08KCL\u548cKVL\uff09<br \/>\nKCL\uff08\u7535\u6d41\u5b9a\u5f8b\uff09\uff1a\u5728\u7535\u8def\u4e2d\u7684\u4efb\u610f\u8282\u70b9\u4e0a\uff0c\u6d41\u5165\u7535\u6d41\u7684\u603b\u548c\u4e0e\u6d41\u51fa\u7535\u6d41\u7684\u603b\u548c\u76f8\u7b49<br \/>\nKVL\uff08\u7535\u538b\u5b9a\u5f8b\uff09\uff1a\u5728\u4efb\u610f\u95ed\u5408\u56de\u8def\u4e2d\uff0c\u7535\u538b\u4e0a\u5347\u548c\u4e0b\u964d\u7684\u603b\u548c\u4e3a\u96f6<\/li>\n<\/ul>\n<p>\u8fd0\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u65f6\uff0c\u7ecf\u5e38\u9700\u8981\u501f\u52a9\u53e0\u52a0\u539f\u7406\u8ba1\u7b97\u5f00\u8def\u7535\u538b\uff0c\u6216\u8005\u901a\u8fc7KCL\u6216KVL\u8fdb\u884c\u79fb\u9664\u53d7\u63a7\u6e90\u540e\u7684\u7535\u963b\u5408\u6210\u3002\u901a\u8fc7\u8fd9\u4e9b\u57fa\u672c\u5b9a\u5f8b\u7406\u6e05\u7535\u8def\u5185\u7684\u7535\u538b\u548c\u7535\u6d41\u540e\uff0c\u6700\u7ec8\u5c06\u5176\u6982\u62ec\u4e3a\u201c\u4e00\u4e2a\u7535\u6e90+\u4e00\u4e2a\u7535\u963b\u201d\u7684\u5f62\u5f0f\uff0c\u8fd9\u5c31\u662f\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"toc17\">\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u5177\u4f53\u5e94\u7528\u5b9e\u4f8b\uff08DC\u7535\u8def\uff09<\/h2>\n<p>\u4e86\u89e3\u6234\u7ef4\u5357\u5b9a\u7406\u5728\u5b9e\u9645\u7535\u8def\u8bbe\u8ba1\u6216\u5206\u6790\u4e2d\u7684\u5177\u4f53\u5e94\u7528\uff0c\u53ef\u4ee5\u52a0\u6df1\u5bf9\u5176\u7684\u7406\u89e3\u3002\u5728\u7535\u6e90\u7535\u8def\u3001\u4f20\u611f\u5668\u7535\u8def\u3001\u7535\u673a\u6216\u52a0\u70ed\u5668\u7684\u9a71\u52a8\u7535\u8def\u7b49\u573a\u666f\u4e2d\uff0c\u8be5\u5b9a\u7406\u5177\u6709\u5c06\u590d\u6742\u90e8\u5206\u8fdb\u884c\u7b80\u5316\u7684\u4f18\u52bf\u3002\u4e0b\u9762\u5c06\u56f4\u7ed5\u76f4\u6d41\u7535\u8def\u5217\u4e3e\u51e0\u4e2a\u6848\u4f8b\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-28286 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf9.png\" alt=\"\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u5177\u4f53\u5e94\u7528\u5b9e\u4f8b\" width=\"656\" height=\"369\" \/><\/p>\n<h3 id=\"toc18\">\u7535\u6e90\u7535\u8def\u4e2d\u7684\u8d1f\u8f7d\u53d8\u52a8\u5206\u6790<\/h3>\n<p>\u5f53\u5728\u7535\u6e90\u5355\u5143\u4e0a\u8fde\u63a5\u4e0d\u540c\u963b\u503c\u548c\u5668\u4ef6\uff0c\u5e76\u7531\u6b64\u60f3\u8981\u8c03\u67e5\u7535\u538b\u548c\u7535\u6d41\u5982\u4f55\u53d8\u5316\u65f6\uff0c\u5373\u4f7f\u7535\u6e90\u5185\u90e8\u7684\u7ed3\u6784\u975e\u5e38\u590d\u6742\uff0c\u901a\u5e38\u4e5f\u53ef\u4ee5\u4ec5\u901a\u8fc7\u89c2\u5bdf\u4e8c\u7aef\u7f51\u7edc\u5f97\u5230\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u3002\u8fd9\u6837\uff0c\u65e0\u8bba\u8d1f\u8f7d\u5982\u4f55\u53d8\u5316\uff0c\u53ea\u8981\\(V_{Th}\\)\u548c\\(R_{Th}\\)\u4fdd\u6301\u6052\u5b9a\uff0c\u5c31\u80fd\u8f7b\u677e\u8ba1\u7b97\u51fa\u8d1f\u8f7d\u7535\u6d41\u548c\u7aef\u53e3\u7535\u538b\u3002\u8fd9\u79cd\u505a\u6cd5\u7684\u4f18\u52bf\u5728\u4e8e\u80fd\u591f\u987a\u5229\u5730\u5b8c\u6210\u7535\u6e90\u8bbe\u8ba1\u7684\u9a8c\u8bc1\u548c\u8bc4\u4f30\u3002<\/p>\n<h3 id=\"toc19\">\u4f20\u611f\u5668\u7535\u8def\u548c\u6267\u884c\u5668\u7535\u8def\u7684\u7b80\u5316<\/h3>\n<p>\u90e8\u5206\u4f20\u611f\u5668\u548c\u6267\u884c\u5668\uff08\u4f8b\u5982\uff1a\u7535\u963b\u53d8\u5316\u578b\u3001\u53cc\u7ebf\u5f0f\u7b49\uff09\u53ef\u88ab\u89c6\u4e3a\u4e8c\u7aef\u5668\u4ef6\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u5c31\u53ef\u4ee5\u8fd0\u7528\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u8f7b\u677e\u5efa\u6a21\u5176\u8f93\u5165\u8f93\u51fa\u7279\u6027\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5177\u5907\u591a\u7aef\u53e3\u7684\u590d\u6742\u4f20\u611f\u5668\uff08\u4f8b\u5982\u8d85\u58f0\u6ce2\u4f20\u611f\u5668\u548cIC\u5185\u7f6e\u578b\u4f20\u611f\u5668\uff09\u9700\u8981\u591a\u6761\u4fe1\u53f7\u7ebf\u548c\u7535\u6e90\u7ebf\uff0c\u4e0d\u4e00\u5b9a\u80fd\u7528\u4e8c\u7aef\u5668\u4ef6\u5efa\u6a21\u3002\u5b9e\u9645\u8bbe\u8ba1\u65f6\uff0c\u9700\u8981\u6839\u636e\u6bcf\u4e2a\u4f20\u611f\u5668\u7684\u5185\u90e8\u7ed3\u6784\u548c\u7aef\u53e3\u6570\u91cf\u6765\u9009\u62e9\u5206\u6790\u65b9\u6cd5\u3002<\/p>\n<h3 id=\"toc20\">DC\u7535\u673a\u548c\u52a0\u70ed\u5668\u7684\u9a71\u52a8\u7535\u8def<\/h3>\n<p>DC\u7535\u673a\u548c\u52a0\u70ed\u5668\u770b\u4f3c\u7b80\u5355\uff0c\u4f46\u5176\u8d1f\u8f7d\u7279\u6027\u4f1a\u968f\u6e29\u5ea6\u548c\u8f6c\u901f\u7b49\u800c\u53d8\u5316\u3002\u5373\u4fbf\u5982\u6b64\uff0c\u5728\u7279\u5b9a\u5de5\u4f5c\u70b9\u9644\u8fd1\uff0c\u53ef\u4ee5\u5c06\u5176\u5185\u90e8\u8fd1\u4f3c\u4e3a\u201c\u7b49\u6548\u7535\u6e90+\u4e32\u8054\u7535\u963b\u201d\u7684\u5f62\u5f0f\uff0c\u5e76\u4e14\u53ef\u4ee5\u6839\u636e\u8d1f\u8f7d\u6761\u4ef6\u8ba1\u7b97\u6d41\u8fc7\u7684\u7535\u6d41\u91cf\u3002\u5373\u4f7f\u7535\u673a\u662f\u975e\u7ebf\u6027\u7684\uff0c\u4f46\u5728\u7279\u5b9a\u8303\u56f4\u5185\u6234\u7ef4\u5357\u8fd1\u4f3c\u4ecd\u53ef\u80fd\u9002\u7528\u3002<\/p>\n<h2 id=\"toc21\">\u53ef\u9760\u8fd0\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u8981\u70b9<\/h2>\n<p>\u8fd0\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u8fdb\u884c\u5206\u6790\u5927\u5927\u5730\u7b80\u5316\u4e86\u7535\u8def\uff0c\u4f46\u5b9e\u9645\u7535\u8def\u4e2d\u53ef\u80fd\u6df7\u6709\u53d7\u63a7\u6e90\u3001\u975e\u7ebf\u6027\u5143\u4ef6\u548c\u5bc4\u751f\u53c2\u6570\u7b49\u3002\u5982\u679c\u9519\u8bef\u5224\u65ad\u4e86\u7406\u60f3\u5316\u7684\u7a0b\u5ea6\u6216\u6821\u6b63\u7684\u5fc5\u8981\u6027\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0e\u7406\u8bba\u503c\u4ea7\u751f\u4e25\u91cd\u504f\u5dee\u3002\u672c\u8282\u603b\u7ed3\u4e86\u8fd0\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u65f6\u9700\u5173\u6ce8\u7684\u8981\u70b9\u3002<\/p>\n<h3 id=\"toc22\">\u53d7\u63a7\u6e90\u7684\u5904\u7406<\/h3>\n<p>\u67d0\u4e9b\u7535\u8def\u53ef\u80fd\u5305\u542b\u7535\u538b\u63a7\u5236\u7535\u6d41\u6e90\u6216\u7535\u538b\u63a7\u5236\u7535\u538b\u6e90\u7b49\u53d7\u63a7\u6e90\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4ec5\u7b80\u5355\u5730\u201c\u5c06\u72ec\u7acb\u7535\u538b\u6e90\u77ed\u8def\u201d\u548c\u201c\u5c06\u72ec\u7acb\u7535\u6d41\u6e90\u5f00\u8def\u201d\u53ef\u80fd\u65e0\u6cd5\u8ba1\u7b97\u51fa\\(R_{Th}\\)\u3002\u8fd9\u65f6\u901a\u5e38\u4f1a\u91c7\u7528\u201c\u6d4b\u8bd5\u7535\u6e90\u6cd5\u201d\u3002\u5728\u4e8c\u7aef\u7f51\u7edc\u4e4b\u95f4\u63d2\u5165\u865a\u62df\u7684\u7535\u538b\u6e90\uff08\u6216\u7535\u6d41\u6e90\uff09\uff0c\u5206\u6790\u6b64\u65f6\u7684\u7535\u6d41\uff08\u6216\u7535\u538b\uff09\uff0c\u5e76\u901a\u8fc7\u6bd4\u503c\u63a8\u5bfc\u51fa\\(R_{Th}\\)\u3002\u5176\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ul class=\"unordered-list\">\n<li>\u65bd\u52a0\u6d4b\u8bd5\u7535\u538b\\(V_{test}\\)\u65f6\u7684\u7535\u6d41\\(I_{test}\\)<\/li>\n<li>\u7531\u6b64\u5f97\u51fa\\(R_{Th}\\) = \\(V_{test}\\) \/ \\(I_{test}\\)<\/li>\n<\/ul>\n<p>\u53ea\u8981\u7535\u8def\u4fdd\u6301\u7ebf\u6027\uff0c\u5373\u4f7f\u6709\u53d7\u63a7\u6e90\u4e5f\u80fd\u51c6\u786e\u8ba1\u7b97\u51fa\u7b49\u6548\u7535\u963b\u3002<\/p>\n<h3 id=\"toc23\">\u77ac\u6001\u73b0\u8c61\u548c\u9ad8\u9891\u9886\u57df<\/h3>\n<p>\u6234\u7ef4\u5357\u5b9a\u7406\u4e5f\u53ef\u4ee5\u5e94\u7528\u4e8eAC\u548c\u77ac\u6001\u5206\u6790\uff0c\u4f46\u82e5\u5b58\u5728\u7ebf\u5708\u6216\u7535\u5bb9\u5668\u7b49\u9891\u7387\u654f\u611f\u5143\u4ef6\u65f6\uff0c\u9700\u8981\u8003\u8651\u5176\u963b\u6297\u548c\u76f8\u4f4d\u3002\u6b64\u5916\uff0c\u5728\u9ad8\u9891\u73af\u5883\u4e0b\uff0c\u5bc4\u751f\u7535\u5bb9\u548c\u5bc4\u751f\u7535\u611f\u4e5f\u4e0d\u5bb9\u5ffd\u89c6\uff0c\u6b64\u65f6\u65e0\u6cd5\u7528\u7b80\u5355\u7684\u201c\u7535\u963b\u201d\u8fd9\u4e00\u4e2a\u503c\u6765\u8868\u5f81\u3002\u56e0\u6b64\uff0c\u5728\u4ea4\u6d41\u548cs\u57df\u5206\u6790\u4e2d\uff0c\u9700\u8981\u5c06\u6234\u7ef4\u5357\u7535\u963b\u6269\u5c55\u4e3a\u5305\u542b\u7535\u6297\u7b49\u7684\u201c\u6234\u7ef4\u5357\u963b\u6297\u201d\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<p>\u5728\u76f4\u6d41\u8303\u56f4\u5185\u65e0\u9700\u8003\u8651\u8fd9\u4e9b\uff0c\u56e0\u6b64\u53ef\u4ee5\u8f7b\u677e\u5e94\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u3002\u4f46\u662f\uff0c\u5f53\u5904\u7406\u7535\u673a\u8fd9\u6837\u7684\u65f6\u53d8\u8d1f\u8f7d\u65f6\uff0c\u5fc5\u987b\u6839\u636e\u76ee\u7684\u8c28\u614e\u5224\u65ad\u5176\u6240\u9700\u7684\u7406\u60f3\u5316\u7a0b\u5ea6\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-28287 aligncenter\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2025\/10\/\u753b\u50cf10.png\" alt=\"\u6234\u7ef4\u5357\u963b\u6297\" width=\"667\" height=\"375\" \/><\/p>\n<p>\u8bf7\u540c\u65f6\u53c2\u9605\u4ee5\u4e0b\u6587\u7ae0\uff1a<br \/>\n<a href=\"https:\/\/techclass.wfjydl.com\/knowledge\/si\/s-si\/08-s-si\/26202\">\u4ec0\u4e48\u662f\u963b\u6297\uff1f\u4e0e\u7535\u963b\u548c\u7535\u6297\u7684\u533a\u522b\u8be6\u89e3<\/a><\/p>\n<h3 id=\"toc24\">\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u5c40\u9650\u6027<\/h3>\n<p>\u6234\u7ef4\u5357\u5b9a\u7406\u867d\u80fd\u6709\u6548<strong>\u7b80\u5316<\/strong>\u7535\u8def\u5206\u6790\uff0c\u4f46\u5728\u4ee5\u4e0b\u573a\u666f\u4e2d\u53ef\u80fd\u65e0\u6cd5\u76f4\u63a5\u5e94\u7528\uff0c\u6216\u9700\u8981\u989d\u5916\u5904\u7406\u3002<\/p>\n<ol class=\"ordered-list\">\n<li><strong>\u975e\u7ebf\u6027\u5143\u4ef6\u548c\u533a\u57df<\/strong>\n<ul>\n<li>\u5bf9\u4e8e\u542b\u6709\u4e8c\u6781\u7ba1\u548c\u6676\u4f53\u7ba1\u7b49\u5f3a\u975e\u7ebf\u6027\u5143\u4ef6\u7684\u7535\u8def\uff0c\u65e0\u6cd5\u76f4\u63a5\u5e94\u7528\u6234\u7ef4\u5357\u5b9a\u7406\u3002<\/li>\n<li>\u6234\u7ef4\u5357\u5b9a\u7406\u662f\u9488\u5bf9\u7ebf\u6027\u7535\u8def\u6210\u7acb\u7684\u5b9a\u7406\uff0c\u56e0\u6b64\u5f53\u5305\u542b\u975e\u7ebf\u6027\u5143\u4ef6\u65f6\uff0c\u9700\u8981\u4f7f\u7528\u5c0f\u4fe1\u53f7\u8fd1\u4f3c\u6216\u5176\u4ed6\u5206\u6790\u65b9\u6cd5\uff08\u4f8b\u5982\uff1a\u5927\u4fe1\u53f7\u5206\u6790\u548cSPICE\u4eff\u771f\u7b49\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9891\u7387\u654f\u611f\u5143\u4ef6<\/strong>\n<ul>\n<li>\u5728\u9664\u7535\u963b\u5916\uff0c\u8fd8\u53d7\u7535\u611f\u548c\u7535\u5bb9\u7b49\u7684\u7535\u6297\u5f71\u54cd\u7684\u9ad8\u9891\u9886\u57df\u6216\u77ac\u6001\u5206\u6790\u4e2d\uff0c\u867d\u7136\u53ef\u4ee5\u5e94\u7528\u6234\u7ef4\u5357\u5b9a\u7406\uff0c\u4f46\u4e5f\u4e0d\u80fd\u5ffd\u7565\u7535\u6297\u3002<\/li>\n<li>\u5904\u7406\u9ad8\u9891\u7535\u8def\u6216\u77ac\u6001\u73b0\u8c61\u65f6\uff0c\u9700\u8981\u8003\u8651\u963b\u6297\u7684\u9891\u7387\u4f9d\u8d56\u6027\u548c\u5bc4\u751f\u5206\u91cf\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5f00\u5173\u7535\u8def\u548c\u52a8\u6001\u5207\u6362<\/strong>\n<ul>\n<li>\u5bf9\u4e8e\u62d3\u6251\u4e0d\u56fa\u5b9a\u7684\u7535\u8def\uff08\u5982PWM\u7b49\uff09\u6216\u7535\u8def\u7ed3\u6784\u4f1a\u968f\u65f6\u95f4\u53d8\u5316\u7684\u60c5\u51b5\uff0c\u6709\u65f6\u5f88\u96be\u7528\u5355\u4e00\u7684\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\u8fdb\u884c\u8868\u5f81\u3002<\/li>\n<li>\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\uff0c\u91c7\u53d6\u9488\u5bf9\u4e0d\u540c\u7684\u5de5\u4f5c\u72b6\u6001\u5207\u6362\u7b49\u6548\u7535\u8def\u8fdb\u884c\u5206\u6790\u7b49\u7b56\u7565\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u53d7\u63a7\u6e90<\/strong>\n<ul>\n<li>\u867d\u7136\u53ef\u4ee5\u91c7\u7528\u6d4b\u8bd5\u7535\u6e90\u6cd5\u5e94\u5bf9\uff0c\u4f46\u5982\u679c\u63a7\u5236\u5173\u7cfb\u590d\u6742\uff0c\u8ba1\u7b97\u8fc7\u7a0b\u6216\u7406\u8bba\u524d\u63d0\u53ef\u80fd\u4f1a\u53d8\u5f97\u7e41\u7410\u3002<\/li>\n<li>\u4f46\u662f\uff0c\u8be5\u65b9\u6cd5\u59cb\u7ec8\u4ee5\u7535\u8def\u5448\u7ebf\u6027\u4e3a\u524d\u63d0\u6761\u4ef6\uff0c\u5982\u679c\u5305\u542b\u975e\u7ebf\u6027\u63a7\u5236\u5143\u4ef6\uff0c\u5219\u9700\u9075\u5faa\u4e0e\u7b2c1.\u9879\u76f8\u540c\u7684\u6ce8\u610f\u4e8b\u9879\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u5b9e\u6d4b\u8bef\u5dee\u548c\u5bb9\u8bb8\u8bef\u5dee<\/strong>\n<ul>\n<li>\u7406\u8bba\u8ba1\u7b97\u7684\\(Th\\)\u548c\\(R_{Th}\\)\u4e0e\u5b9e\u6d4b\u503c\u5e76\u975e\u603b\u662f\u5b8c\u5168\u4e00\u81f4\u7684\u3002<\/li>\n<li>\u7531\u4e8e\u7535\u8def\u5143\u4ef6\u7684\u5236\u9020\u8bef\u5dee\u3001\u8d70\u7ebf\u7535\u963b\u3001\u6d4b\u91cf\u4eea\u5668\u7684\u7cbe\u5ea6\u4ee5\u53ca\u6e29\u5ea6\u53d8\u5316\u7b49\u5f71\u54cd\uff0c\u7406\u8bba\u503c\u4e0e\u5b9e\u6d4b\u503c\u4e4b\u95f4\u53ef\u80fd\u51fa\u73b0\u504f\u5dee\u3002<\/li>\n<li>\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9700\u5728\u8003\u8651\u8fd9\u4e9b\u8bef\u5dee\u56e0\u7d20\u7684\u57fa\u7840\u4e0a\u5e94\u7528\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\uff0c\u6216\u5fc5\u8981\u65f6\u8fdb\u884c\u6821\u6b63\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u5c3d\u7ba1\u5982\u6b64\uff0c\u6234\u7ef4\u5357\u5b9a\u7406\u4f5c\u4e3a\u7535\u8def\u5206\u6790\u7684\u57fa\u7840\u7406\u8bba\u4ecd\u5177\u6709\u91cd\u8981\u4ef7\u503c\u3002\u53ea\u8981\u5728\u8003\u8651\u975e\u7ebf\u6027\u3001\u65f6\u53d8\u548c\u9ad8\u9891\u54cd\u5e94\u7684\u540c\u65f6\uff0c\u5408\u7406\u5224\u65ad\u6234\u7ef4\u5357\u5b9a\u7406\u7684\u5e94\u7528\u8303\u56f4\uff0c\u4ecd\u80fd\u53d1\u6325\u5176\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n<h3 id=\"toc25\">\u4e0e\u5b9e\u6d4b\u7684\u6821\u51c6<\/h3>\n<p>\u901a\u8fc7\u7406\u8bba\u8ba1\u7b97\u6216\u4eff\u771f\u5f97\u51fa\u7684\u6234\u7ef4\u5357\u7b49\u6548\u7535\u8def\uff0c\u4e0e\u5b9e\u6d4b\u7ed3\u679c\u5b58\u5728\u4e00\u5b9a\u5dee\u5f02\u662f\u5e38\u6709\u7684\u4e8b\u3002\u5143\u4ef6\u8bef\u5dee\u3001\u8d70\u7ebf\u7535\u963b\u3001\u63a5\u89e6\u7535\u963b\u548c\u5bc4\u751f\u53c2\u6570\u7b49\u90fd\u4f1a\u5bf9\u5176\u4ea7\u751f\u5f71\u54cd\u3002\u6839\u636e\u5b9e\u6d4b\u7ed3\u679c\uff0c\u4ee5\u201c\u8be5\u7535\u8def\u7684\u6234\u7ef4\u5357\u7535\u538b\u7ea611.8V\uff0c\u6234\u7ef4\u5357\u7535\u963b\u7ea63.1\u03a9\u201d\u7b49\u5f62\u5f0f\u8fdb\u884c\u6821\u6b63\uff0c\u80fd\u591f\u5b9e\u73b0\u66f4\u8d34\u8fd1\u5b9e\u9645\u7684\u8bbe\u8ba1\u548c\u5206\u6790\u3002<\/p>\n<h2 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