{"id":10112,"date":"2025-11-24T23:45:28","date_gmt":"2025-11-24T23:45:28","guid":{"rendered":"https:\/\/www.besterpcba.com\/?p=10112"},"modified":"2025-11-24T23:45:28","modified_gmt":"2025-11-24T23:45:28","slug":"heavy-copper-thermal-reliefs","status":"publish","type":"post","link":"https:\/\/www.besterpcba.com\/zh_hk\/%e9%87%8d%e9%8a%85%e7%86%b1%e7%87%99%e9%98%b2%e8%ad%b7\/","title":{"rendered":"\u91cd\u9285\u71b1\u7de9\u89e3\uff1a\u5b89\u57f9\u8207\u710a\u6599\u4e4b\u9593\u7684\u6230\u722d"},"content":{"rendered":"<p>\u4f60\u82b1\u4e86\u6578\u9031\u5728\u4f48\u5c40\u4e0a\u3002\u539f\u7406\u5716\u5df2\u9a57\u8b49\uff0cAltium\u4e2d\u7684DRC\u6e05\u9664\uff0c\u96fb\u6e90\u5c64\u662f\u5de8\u5927\u76843oz\u9285\u677f\uff0c\u88ab\u8a2d\u8a08\u70ba\u53ef\u627f\u8f09100\u5b89\u57f9\u800c\u4e0d\u51fa\u554f\u984c\u3002\u5728\u87a2\u5e55\u4e0a\uff0c\u770b\u8d77\u4f86\u50cf\u662f\u4e00\u500b\u4f4e\u963b\u6297\u5e03\u7dda\u7684\u5091\u4f5c\u3002\u7db2\u7d61\u5df2\u5b8c\u5168\u9023\u63a5\uff0c\u7a7a\u7dda\u5df2\u6d88\u9664\uff0c\u6a21\u64ec\u986f\u793a\u51fa\u4e00\u689d\u6f02\u4eae\u7684\u3001\u51b7\u85cd\u8272\u7684\u96fb\u6d41\u8def\u5f91\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.besterpcba.com\/wp-content\/uploads\/2025\/11\/pcb-layout-thermal-simulation.jpg\" alt=\"\u4e00\u500b\u96fb\u8166\u87a2\u5e55\u986f\u793a\u8a2d\u8a08\u4e2d\u7684PCB\u4f48\u5c40\uff0c\u71b1\u6a21\u64ec\u758a\u52a0\u5728\u4e00\u500b\u5927\u578b\u96fb\u6e90\u5c64\u4e0a\uff0c\u5448\u73fe\u51b7\u8272\u8abf\u7684\u5747\u52fb\u85cd\u8272\u3002\" title=\"\u5177\u6709\u71b1\u6a21\u64ec\u7684PCB\u4f48\u5c40\"\/><figcaption class=\"wp-element-caption\">\u5728\u87a2\u5e55\u4e0a\uff0c\u76f4\u9023\u96fb\u6e90\u5c64\u4f3c\u4e4e\u662f\u4e00\u689d\u5b8c\u7f8e\u7684\u4f4e\u963b\u6297\u96fb\u6d41\u8def\u5f91\u3002<\/figcaption><\/figure><\/div>\n\n\n<p>\u7136\u5f8c\u96fb\u8def\u677f\u5f9e\u751f\u7522\u5ee0\u8fd4\u56de\uff0c\u5b83\u5011\u8b8a\u6210\u78da\u982d\u3002<\/p>\n\n\n\n<p>\u9023\u63a5\u5668\u812b\u843d\u662f\u56e0\u70ba\u710a\u9ede\u51b7\u537b\u4e14\u9846\u7c92\u72c0\u3002\u96fb\u6e90\u5834\u6548\u61c9\u6676\u9ad4\u7ba1\u5728\u73fe\u5834\u5931\u6548\uff0c\u56e0\u70ba\u5b83\u5011\u5f9e\u672a\u771f\u6b63\u6fd5\u6f64\u5230\u710a\u76e4\uff0c\u9020\u6210\u9ad8\u963b\u6297\u63a5\u89f8\u9ede\uff0c\u4e26\u9010\u6f38\u5347\u6eab\u6700\u7d42\u7834\u88c2\u3002\u4f60\u6c92\u6709\u8a2d\u8a08\u96fb\u8def\uff0c\u4f60\u8a2d\u8a08\u7684\u662f\u4e00\u500b\u6574\u9ad4\u5438\u6536\u56de\u6d41\u7210\u6240\u6709\u71b1\u80fd\u7684\u6563\u71b1\u5668\u3002<\/p>\n\n\n\n<p>\u9019\u662f\u96fb\u6e90PCB\u8a2d\u8a08\u7684\u6839\u672c\u77db\u76fe\u3002\u70ba\u4e86\u79fb\u52d5\u5927\u91cf\u96fb\u6d41\u6240\u9700\u7684\u9285\u5e7e\u4f55\u5f62\u72c0\uff0c\u5e38\u5e38\u4e5f\u662f\u963b\u7919\u53ef\u9760\u710a\u9ede\u7684\u5e7e\u4f55\u5f62\u72c0\u3002\u7269\u7406\u5b78\u4e26\u4e0d\u5728\u4e4e\u4f60\u7684\u7db2\u8868\u9023\u63a5\u3002\u5982\u679c\u4f60\u4e0d\u80fd\u8b93\u710a\u6599\u6d41\u52d5\uff0c\u4f60\u5c31\u6c92\u6709\u96fb\u8def\u677f\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"the-thermodynamics-of-a-brick\">\u78da\u7684\u71b1\u529b\u5b78<\/h2>\n\n\n<p>\u505c\u6b62\u50cf\u96fb\u6c23\u5de5\u7a0b\u5e2b\u4e00\u6a23\u601d\u8003\uff0c\u958b\u59cb\u50cf\u8655\u7406\u71b1\u6d41\u7684\u6c34\u7ba1\u5de5\u4e00\u6a23\u601d\u8003\u3002\u7576\u4f60\u5c07\u5143\u4ef6\u710a\u76e4\u76f4\u63a5\u653e\u5728\u4e00\u500b\u5927\u578b\u9285\u5c64\uff08\u5c24\u5176\u662f2oz\u30013oz\u6216\u66f4\u91cd\u7684\uff09\u4e0a\u6642\uff0c\u4f60\u5c31\u662f\u5728\u5c07\u4e00\u500b\u5c0f\u7684\u7194\u878d\u91d1\u5c6c\u6c60\u8207\u4e00\u500b\u5de8\u5927\u7684\u71b1\u5132\u5b58\u5eab\u76f8\u9023\u63a5\u3002<\/p>\n\n\n\n<p>\u7576\u56de\u6d41\u7210\u6216\u70d9\u9435\u89f8\u78b0\u5230\u8a72\u710a\u76e4\uff0c\u5b83\u6703\u8a66\u5716\u5c07\u5c40\u90e8\u6eab\u5ea6\u63d0\u9ad8\u5230\u710a\u6599\u7684\u7194\u9ede\u2014\u2014\u901a\u5e38\u70ba\u7d04217\u00b0C\uff08SAC305\uff09\u3002\u7136\u800c\uff0c\u9285\u662f\u500b\u512a\u79c0\u7684\u5c0e\u9ad4\u3002\u90a3\u500b\u5de8\u5927\u7684\u63a5\u5730\u5c64\u50cf\u9ad8\u901f\u516c\u8def\u4e00\u6a23\uff0c\u8fc5\u901f\u5c07\u71b1\u80fd\u5f9e\u710a\u76e4\u5f15\u8d70\uff0c\u9060\u6bd4\u71b1\u6e90\u80fd\u63d0\u4f9b\u7684\u5feb\u3002\u9019\u5c31\u50cf\u7528\u6d88\u9632\u6c34\u7ba1\u704c\u6eff\u4e00\u500b\u6876\uff0c\u6c34\u5f9e\u5e95\u90e8\u6392\u51fa\u3002\u4f60\u53ef\u4ee5\u628a\u70d9\u9435\u6eab\u5ea6\u8abf\u5230450\u00b0C\uff0c\u4f46\u4ecd\u53ef\u80fd\u640d\u58de\u9285\u8207FR-4\u4e4b\u9593\u7684\u9ecf\u5408\u5291\uff0c\u4f46\u6c92\u95dc\u4fc2\u3002\u71b1\u91cf\u4e0d\u6703\u505c\u7559\u5728\u710a\u9ede\uff0c\u800c\u662f\u64f4\u6563\u5230\u6574\u500b\u5c64\u677f\u4e2d\u3002<\/p>\n\n\n\n<p>\u7d50\u679c\u5c31\u662f\"\u51b7\u710a\"\u3002\u710a\u6599\u53ef\u80fd\u5728\u5143\u4ef6\u5f15\u8173\u4e0a\u878d\u5316\uff0c\u4f46\u4e00\u89f8\u78b0\u5230\u9285\u710a\u76e4\u5c31\u6703\u51dd\u56fa\u3002\u5b83\u50cf\u6c34\u9280\u73e0\u4e00\u6a23\u805a\u96c6\u5728\u8868\u9762\uff0c\u800c\u4e0d\u662f\u6d41\u52d5\u6210\u70ba\u5e73\u6ed1\u7684\u89d2\u5ea6\u3002\u7576\u6280\u8853\u54e1\u8a66\u5716\u7528\u70d9\u9435\u56fa\u5b9a\uff0c\u6301\u7e8c\u52a0\u71b145\u79d2\u6642\uff0c\u901a\u5e38\u53ea\u662f\u4ee4\u710a\u76e4\u5206\u5c64\u6216\u71d2\u6389\u52a9\u710a\u5291\uff0c\u5c0e\u81f4\u710a\u63a5\u4e0d\u826f\u3002\u4eba\u5011\u5e38\u8cac\u602a\u5de5\u5177\uff0c\u8a8d\u70ba\u9700\u8981\u66f4\u9ad8\u74e6\u6578\u7684\u70d9\u9435\uff0c\u4f46\u5373\u4f7f\u662fMetcal MX-500\u914d\u4e0a\u91cd\u578b\u9435\u5634\uff0c\u4e5f\u7121\u6cd5\u5c0d\u62974oz\u7684\u9285\u5c64\uff0c\u9664\u975e\u5f97\u5230\u5e6b\u52a9\u3002\u71b1\u8cea\u91cf\u5728\u6bcf\u6b21\u90fd\u7372\u52dd\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"the-direct-connect-myth\">\"\u76f4\u9023\"\u795e\u8a71<\/h2>\n\n\n<p>\u5728\u96fb\u529b\u96fb\u5b50\u9818\u57df\u4e2d\u6d41\u50b3\u7684\u6301\u7e8c\u795e\u8a71\u8072\u7a31\u9ad8\u96fb\u6d41\u8def\u5f91 <em>\u5fc5\u9808<\/em> 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<em>\u63a5\u53d7<\/em> \u5747\u52fb\u52a0\u71b1\u3002\u9664\u975e\u4f60\u505a\u5c04\u983b\u5de5\u4f5c\uff0c\u963b\u6297\u4e0d\u9023\u7e8c\u662f\u95dc\u9375\uff0c\u6216\u8005\u8655\u7406\u7684\u8108\u885d\u96fb\u6d41\u9ad8\u5230\u6703\u77ac\u9593\u84b8\u767c\u6389\u4e00\u500b\u8f3b\u689d\uff0c\u5426\u5247\u5728\u96fb\u6e90\u5c64\u4e0a\u7684\u76f4\u63a5\u9023\u63a5\u901a\u5e38\u662f\u4e00\u500b\u507d\u88dd\u6210\u512a\u5316\u7684\u8a2d\u8a08\u7f3a\u9677\u3002<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"calculating-the-compromise\">\u6298\u8877\u65b9\u6848\u7684\u8a08\u7b97<\/h2>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/www.besterpcba.com\/wp-content\/uploads\/2025\/11\/pcb-thermal-relief-spokes-closeup.jpg\" alt=\"\u4e00\u5f35\u7da0\u8272\u96fb\u8def\u677f\u7684\u5b8f\u89c0\u7167\u7247\uff0c\u986f\u793a\u4e00\u500b\u5143\u4ef6\u710a\u76e4\u9023\u63a5\u5230\u4e00\u500b\u5927\u578b\u9285\u5e73\u9762\uff0c\u901a\u904e\u56db\u6839\u7c97\u9285\u8fae\u5b50\uff0c\u50cf\u4e00\u500b\u8eca\u8f2a\u3002\" title=\"PCB\u71b1\u89e3\u653e\u7684\u7279\u5beb\"\/><figcaption 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alt=\"\u4e00\u540d\u96fb\u5b50\u6280\u8853\u4eba\u54e1\u5728\u96fb\u5b50\u5de5\u4f5c\u53f0\u4e0a\u4f7f\u7528\u710a\u63a5\u5de5\u5177\uff0c\u710a\u5728\u653e\u5728\u9810\u71b1\u7528\u7684\u5c0f\u71b1\u677f\u4e0a\u7684\u96fb\u8def\u677f\u4e0a\u3002\" title=\"\u6280\u8853\u4eba\u54e1\u91cd\u5de5\u4e00\u500b\u56f0\u96e3\u7684PCB\"\/><figcaption 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copper thermal reliefs that actually allow solder 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