\n\tLED\u7535\u6e90\u7535\u78c1\u5e72\u6270\uff0c\u5de5\u7a0b\u5e08\u8981\u8003\u8651\u7684\u4e3b\u8981\u65b9\u9762\u6709\uff1a\u7535\u8def<\/u>\u63aa\u65bd\u3001EMI\u6ee4\u6ce2\u3001\u5143\u5668\u4ef6\u9009\u62e9\u3001\u5c4f\u853d\u548c\u5370\u5236\u7535\u8def\u677f\u6297\u5e72\u6270\u8bbe\u8ba1\u7b49\u3002<\/p>\n
\n\t\u5bf9\u4e8e\u8bbe\u8ba1LED\u7535\u6e90\u7684\u5de5\u7a0b\u5e08\u6765\u8bf4\uff0c\u7535\u78c1\u5e72\u6270\u95ee\u9898\u662f\u4e00\u76f4\u5b58\u5728\u4e8e\u8bbe\u8ba1\u4e2d\u7684\u4e00\u4e2a\u5173\u952e\u95ee\u9898\u3002\u5982\u4f55\u80fd\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff1f\u6211\u4eec\u5148\u6765\u770b\u770b\u5f71\u54cd\u7535\u78c1\u517c\u5bb9\u7684\u51e0\u4e2a\u56e0\u7d20\u3002<\/p>\n
\n\t\u4e00 \u5f71\u54cdEMC\u7684\u51e0\u4e2a\u56e0\u7d20<\/p>\n
\n\t(1)\u9a71\u52a8\u7535\u6e90\u7684\u7535\u8def\u7ed3\u6784<\/p>\n
\n\t\u6700\u521d\u7684LED\u7535\u6e90\u5c31\u662f\u7ebf\u6027\u7535\u6e90\uff0c\u4f46\u662f\u7ebf\u6027\u7535\u6e90\u5728\u5de5\u4f5c\u65f6\u4f1a\u4ee5\u53d1\u70ed\u7684\u5f62\u5f0f\u635f\u8017\u5927\u91cf\u80fd\u91cf\u3002\u7ebf\u6027\u7535\u6e90\u7684\u5de5\u4f5c\u65b9\u5f0f\uff0c\u4f7f\u4ed6\u4ece\u9ad8\u538b\u53d8\u4f4e\u538b\u5fc5\u987b\u6709\u5c06\u538b\u88c5\u7f6e\uff0c\u4e00\u822c\u7684\u90fd\u662f\u53d8\u538b\u5668<\/u>\uff0c\u518d\u7ecf\u8fc7\u6574\u6d41\u8f93\u51fa\u76f4\u6d41\u7535\u538b\u3002\u867d\u7136\u7b28\u91cd\uff0c\u53d1\u70ed\u91cf\u5927\uff0c\u4f18\u70b9\u662f\uff0c\u5bf9\u5916\u5e72\u6270\u5c0f\uff0c\u7535\u78c1\u5e72\u6270\u5c0f\uff0c\u4e5f\u5bb9\u6613\u89e3\u51b3\u3002<\/p>\n
\n\t\u800c\u73b0\u5728\u4f7f\u7528\u6bd4\u8f83\u591a\u7684LED\u5f00\u5173\u7535\u6e90<\/u>\uff0c\u90fd\u662f\u4ee5 PWM\u5f62\u5f0f\u7684LED\u9a71\u52a8\u7535\u6e90\u662f\u8ba9\u529f\u7387\u6676\u4f53\u7ba1<\/u>\u5de5\u4f5c\u5728\u5bfc\u901a\u548c\u5173\u65ad\u72b6\u6001\u3002\u5728\u5bfc\u901a\u65f6\uff0c\u7535\u538b\u4f4e\uff0c\u7535\u6d41\u5927;\u5173\u65ad\u65f6\uff0c\u7535\u538b\u9ad8\uff0c\u7535\u6d41\u5c0f\uff0c\u56e0\u6b64\u529f\u7387\u534a\u5bfc\u4f53\u5668\u4ef6\u4e0a\u6240\u4ea7\u751f\u7684\u635f\u8017\u4e5f\u5f88\u5c0f\u3002\u7f3a\u70b9\u6bd4\u8f83\u660e\u663e\u7684\u662f\uff0c\u7535\u78c1\u5e72\u6270(EMI)\u4e5f\u66f4\u4e25\u91cd\u3002<\/p>\n
\n\t(2)\u5f00\u5173\u9891\u7387<\/p>\n
\n\tLED\u7535\u6e90\u7684\u7535\u78c1\u517c\u5bb9\u51fa\u73b0\u95ee\u9898\u4e00\u822c\u662f\u5f00\u5173\u7535\u8def\u7684\u7535\u6e90\u4e2d\u3002\u800c\u5f00\u5173\u7535\u8def\u662f\u5f00\u5173\u7535\u6e90\u7684\u4e3b\u8981\u5e72\u6270\u6e90\u4e4b\u4e00\u3002<\/p>\n
\n\t\u5f00\u5173\u7535\u8def\u662fLED\u9a71\u52a8\u7535\u6e90\u7684\u6838\u5fc3\uff0c\u5f00\u5173\u7535\u8def\u4e3b\u8981\u7531\u5f00\u5173\u7ba1\u548c\u9ad8\u9891\u53d8\u538b\u5668<\/u>\u7ec4\u6210\u3002\u5b83\u4ea7\u751f\u7684du\/dt\u5177\u6709\u8f83\u5927\u5e45\u5ea6\u7684\u8109\u51b2\uff0c\u9891\u5e26\u8f83\u5bbd\u4e14\u8c10\u6ce2\u4e30\u5bcc\u3002<\/p>\n
\n\t\u8fd9\u79cd\u9ad8\u9891\u8109\u51b2\u5e72\u6270\u4ea7\u751f\u7684\u4e3b\u8981\u539f\u56e0\u662f\uff1a\u5f00\u5173\u7ba1\u8d1f\u8f7d\u4e3a\u9ad8\u9891\u53d8\u538b\u5668\u521d\u7ea7\u7ebf\u5708\uff0c\u662f\u611f\u6027\u8d1f\u8f7d\u3002<\/p>\n
\n\t![\"\u5982\u4f55\u89e3\u51b3LED\u7535\u6e90\u4e2d\u7684\u7535\u78c1\u5e72\u6270\u95ee\u9898\"](\"http:\/\/www.szryc.com\/uploads\/allimg\/190408\/2136053027-0.png\")
<\/p>\n
\n\t\u56fe1\uff1a\u5f00\u5173\u8109\u51b2\u5c16\u5cf0\u7684\u4ea7\u751f<\/p>\n
\n\t\u5bfc\u901a\u77ac\u95f4\uff0c\u521d\u7ea7\u7ebf\u5708\u4ea7\u751f\u5f88\u5927\u7684\u6d8c\u6d41\uff0c\u5e76\u5728\u521d\u7ea7\u7ebf\u5708\u7684\u4e24\u7aef\u51fa\u73b0\u8f83\u9ad8\u7684\u6d6a\u6d8c\u5c16\u5cf0\u7535\u538b;\u65ad\u5f00\u77ac\u95f4\uff0c\u7531\u4e8e\u521d\u7ea7\u7ebf\u5708\u7684\u6f0f\u78c1\u901a\uff0c\u81f4\u4f7f\u90e8\u5206\u80fd\u91cf\u6ca1\u6709\u4ece\u4e00\u6b21\u7ebf\u5708\u4f20\u8f93\u5230\u4e8c\u6b21\u7ebf\u5708\uff0c\u7535\u8def\u4e2d\u5f62\u6210\u5e26\u6709\u5c16\u5cf0\u7684\u8870\u51cf\u632f\u8361\uff0c\u53e0\u52a0\u5728\u5173\u65ad\u7535\u538b\u4e0a\uff0c\u5f62\u6210\u5173\u65ad\u7535\u538b\u5c16\u5cf0\u3002<\/p>\n
\n\t\u9ad8\u9891\u8109\u51b2\u4ea7\u751f\u66f4\u591a\u7684\u53d1\u5c04\uff0c\u5468\u671f\u6027\u4fe1\u53f7\u4ea7\u751f\u66f4\u591a\u7684\u53d1\u5c04\u3002\u5728LED\u7535\u6e90\u7cfb\u7edf\u4e2d\uff0c\u5f00\u5173\u7535\u8def\u4ea7\u751f\u7535\u6d41\u5c16\u5cf0\u4fe1\u53f7\uff0c\u800c\u5f53\u8d1f\u8f7d\u7535\u6d41\u53d8\u5316\u65f6\u4e5f\u4f1a\u4ea7\u751f\u7535\u6d41\u5c16\u5cf0\u4fe1\u53f7\u3002\u8fd9\u5c31\u7535\u78c1\u5e72\u6270\u6839\u6e90\u4e4b\u4e00\u3002<\/p>\n
\n\t(3)\u63a5\u5730<\/p>\n
\n\t\u5728\u6240\u6709EMC\u9898\u76ee\u4e2d\uff0c\u4e3b\u8981\u9898\u76ee\u662f\u4e0d\u9002\u5f53\u7684\u63a5\u5730\u5f15\u8d77\u7684\u3002\u6709\u4e09\u79cd\u4fe1\u53f7\u63a5\u5730\u65b9\u6cd5\uff1a\u5355\u70b9\u3001\u591a\u70b9\u548c\u6df7\u5408\u3002\u5728\u5f00\u5173\u7535\u8def\u9891\u7387\u4f4e\u4e8e1MHz\u65f6\uff0c\u53ef\u91c7\u7528\u5355\u70b9\u63a5\u5730\u65b9\u6cd5\uff0c\u4f46\u4e0d\u9002\u5b9c\u9ad8\u9891;\u5728\u9ad8\u9891\u5e94\u7528\u4e2d\uff0c\u6700\u597d\u91c7\u7528\u591a\u70b9\u63a5\u5730\u3002\u6df7\u5408\u63a5\u5730\u662f\u4f4e\u9891\u7528\u5355\u70b9\u63a5\u5730\uff0c\u800c\u9ad8\u9891\u7528\u591a\u70b9\u63a5\u5730\u7684\u65b9\u6cd5\u3002\u5730\u7ebf\u5e03\u5c40\u662f\u5173\u952e\uff0c\u9ad8\u9891\u6570\u5b57\u7535\u8def\u548c\u4f4e\u7535\u5e73\u6a21\u62df\u7535\u8def<\/u>\u7684\u63a5\u5730\u7535\u8def\u5c3d\u4e0d\u80fd\u6df7\u5408\u3002<\/p>\n
\n\t(4)PCB<\/u>\u8bbe\u8ba1<\/p>\n
\n\t\u9002\u5f53\u7684\u5370\u5237\u7535\u8def\u677f(PCB)\u5e03\u7ebf\u5bf9\u9632\u6b62EMI\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002<\/p>\n
\n\t(5)\u667a\u80fdLED\u7535\u6e90\u7684\u590d\u4f4d\u7535\u8def\u8bbe\u8ba1<\/p>\n
\n\t\u5728LED\u7535\u6e90\u4e2d\uff0c\u6709\u4e0d\u5c11\u667a\u80fdLED\u7535\u6e90\u91c7\u7528\u5355\u7247\u673a<\/u>\u63a7\u5236\uff0c\u5e76\u4e14\u6709\u7684LED\u7535\u6e90\u91c7\u7528\u5355\u7247\u673a\u63a7\u5236\u5f00\u5173\u7535\u8def\u7684\u5360\u7a7a\u6bd4\uff0c\u5355\u7247\u673a\u7684\u770b\u95e8\u72d7<\/u>\u7cfb\u7edf\u5bf9\u6574\u4e2aLED\u7535\u6e90\u7684\u8fd0\u884c\u8d77\u7740\u7279\u522b\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u7531\u4e8e\u6240\u6709\u7684\u5e72\u6270\u6e90\u4e0d\u53ef\u80fd\u5168\u90e8\u88ab\u9694\u79bb\u6216\u5f80\u9664\uff0c\u4e00\u65e6\u8fdb\u8fdbCPU<\/u>\u5e72\u6270\u7a0b\u5e8f\u7684\u6b63\u5e38\u8fd0\u884c\uff0c\u90a3\u4e48\u590d\u4f4d\u7cfb\u7edf\u7ed3\u5408\u8f6f\u4ef6\u5904\u7406\u63aa\u65bd\u5c31\u6210\u4e86\u4e00\u9053\u6709\u6548\u7684\u7ea0\u9519\u9632\u5fa1\u7684\u5c4f\u969c\u4e86\u3002\u5e38\u7528\u7684\u590d\u4f4d\u7cfb\u7edf\u6709\u4ee5\u4e0b\u4e24\u79cd\uff1a<\/p>\n
\n\t\u2460\u5916\u90e8\u590d\u4f4d\u7cfb\u7edf\u3002\u5916\u90e8"\u770b\u95e8\u72d7"\u7535\u8def\u53ef\u4ee5\u81ea\u5df1\u8bbe\u8ba1\u4e5f\u53ef\u4ee5\u7528\u4e13\u95e8\u7684"\u770b\u95e8\u72d7"\u82af\u7247\u6765\u642d\u5efa\u3002\u8fd9\u6837\uff0c\u5047\u5982\u7a0b\u5e8f\u7cfb\u7edf\u9677\u8fdb\u4e00\u4e2a\u6b7b\u5faa\u73af\uff0c\u800c\u8be5\u5faa\u73af\u4e2d\u6070\u5de7\u6709\u7740"\u5582\u72d7"\u4fe1\u53f7\u7684\u8bdd\uff0c\u90a3\u4e48\u8be5\u590d\u4f4d\u7535\u8def\u5c31\u65e0\u6cd5\u5b9e\u73b0\u5b83\u7684\u5e94\u6709\u7684\u529f\u80fd\u4e86\u3002<\/p>\n
\n\t\u2461\u73b0\u5728\u8d8a\u6765\u8d8a\u591a\u7684LED\u7535\u6e90\u90fd\u5e26\u6709\u81ea\u5df1\u7684\u7247\u4e0a\u590d\u4f4d\u7cfb\u7edf\uff0c\u8fd9\u6837\u7528\u6237\u5c31\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u4f7f\u7528\u5176\u5185\u90e8\u7684\u590d\u4f4d\u5b9a\u65f6\u5668<\/u>\u4e86\uff0c\u4f46\u662f\uff0c\u6709\u4e9b\u667a\u80fdLED\u7535\u6e90\u7684\u63a7\u5236\u7535\u8def\u590d\u4f4d\u6307\u4ee4\u592a\u8fc7\u4e8e\u7b80\u5355\uff0c\u8fd9\u6837\u4e5f\u4f1a\u5b58\u5728\u8c61\u4e0a\u8ff0\u6b7b\u5faa\u73af\u90a3\u6837\u7684"\u5582\u72d7"\u6307\u4ee4\uff0c\u4f7f\u5176\u5931\u5f80\u76d1\u63a7\u4f5c\u7528\u3002<\/p>\n
\n\t\u4e8c \u5bf9\u5e72\u6270\u63aa\u65bd\u7684\u786c\u4ef6\u5904\u7406\u65b9\u6cd5<\/p>\n
\n\t\u8981\u89e3\u51b3LED\u9a71\u52a8\u7535\u6e90\u7684\u7535\u78c1\u5e72\u6270\u95ee\u9898\uff0c\u53ef\u4ece\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u5165\u624b\uff1a<\/p>\n
\n\t1.\u51cf\u5c11\u5f00\u5173\u7535\u6e90\u672c\u8eab\u7684\u5e72\u6270<\/p>\n
\n\t\u2460\u8f6f\u5f00\u5173\u6280\u672f\uff1a\u5728\u539f\u6709\u7684\u786c\u5f00\u5173\u7535\u8def\u4e2d\u589e\u52a0\u7535\u611f<\/u>\u548c\u7535\u5bb9<\/u>\u5143\u4ef6\uff0c\u5229\u7528\u7535\u611f\u548c\u7535\u5bb9\u7684\u8c10\u632f\uff0c\u964d\u4f4e\u5f00\u5173\u8fc7\u7a0b\u4e2d\u7684du\/dt\u548cdi\/dt\uff0c\u4f7f\u5f00\u5173\u5668\u4ef6\u5f00\u901a\u65f6\u7535\u538b\u7684\u4e0b\u964d\u5148\u4e8e\u7535\u6d41\u7684\u4e0a\u5347\uff0c\u6216\u5173\u65ad\u65f6\u7535\u6d41\u7684\u4e0b\u964d\u5148\u4e8e\u7535\u538b\u7684\u4e0a\u5347\uff0c\u6765\u6d88\u9664\u7535\u538b\u548c\u7535\u6d41\u7684\u91cd\u53e0\u3002<\/p>\n
\n\t\u2461\u5f00\u5173\u9891\u7387\u8c03\u5236\u6280\u672f\uff1a\u901a\u8fc7\u8c03\u5236\u5f00\u5173\u9891\u7387fc\uff0c\u628a\u96c6\u4e2d\u5728fc\u53ca\u5176\u8c10\u6ce22fc\u30013fc…\u4e0a\u7684\u80fd\u91cf\u5206\u6563\u5230\u5b83\u4eec\u5468\u56f4\u7684\u9891\u5e26\u4e0a\uff0c\u4ee5\u964d\u4f4e\u5404\u4e2a\u9891\u70b9\u4e0a\u7684EMI\u5e45\u503c\u3002<\/p>\n
\n\t\u2462\u5143\u5668\u4ef6\u7684\u9009\u62e9\uff1a\u9009\u62e9\u4e0d\u6613\u4ea7\u751f\u566a\u58f0\u3001\u4e0d\u6613\u4f20\u5bfc\u548c\u8f90\u5c04\u566a\u58f0\u7684\u5143\u5668\u4ef6\u3002\u901a\u5e38\u7279\u522b\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u4e8c\u6781\u7ba1<\/u>\u548c\u53d8\u538b\u5668\u7b49\u7ed5\u7ec4\u7c7b\u5143\u5668\u4ef6\u7684\u9009\u7528\u3002\u53cd\u5411\u6062\u590d\u7535\u6d41\u5c0f\u3001\u6062\u590d\u65f6\u95f4\u77ed\u7684\u5feb\u901f\u6062\u590d\u4e8c\u6781\u7ba1\u662f\u5f00\u5173\u7535\u6e90\u9ad8\u9891\u6574\u6d41\u90e8\u5206\u7684\u7406\u60f3\u5668\u4ef6\u3002<\/p>\n
\n\t\u2463 \u5408\u7406\u4f7f\u7528\u7535\u78c1\u5e72\u6270\u6ee4\u6ce2\u5668<\/u>\uff1aEMI\u6ee4\u6ce2\u5668\u7684\u4e3b\u8981\u76ee\u7684\u4e4b\u4e00\uff0c\u7535\u7f51\u566a\u58f0\u662f\u7535\u78c1\u5e72\u6270\u7684\u4e00\u79cd\uff0c\u5b83\u5c5e\u4e8e\u5c04\u9891\u5e72\u6270(RFI),\u5176\u4f20\u5bfc\u566a\u58f0\u7684\u9891\u8c31\u5927\u81f4\u4e3a10KHz~30MHz\uff0c\u6700\u9ad8\u53ef\u8fbe150MHz\u3002<\/p>\n
\n\t\u5728\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u5dee\u6a21\u5e72\u6270\u5e45\u5ea6\u5c0f\uff0c\u9891\u7387\u4f4e\uff0c\u6240\u9020\u6210\u7684\u5e72\u6270\u8f83\u5c0f;\u5171\u6a21\u5e72\u6270\u5e45\u5ea6\u5927\uff0c\u9891\u7387\u9ad8\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u5bfc\u7ebf\u4ea7\u751f\u8f90\u5c04\uff0c\u6240\u9020\u6210\u7684\u5e72\u6270\u8f83\u5927\u3002\u6b32\u524a\u5f31\u4f20\u5bfc\u5e72\u6270\uff0c\u6700\u6709\u6548\u7684\u65b9\u6cd5\u5c31\u662f\u5728\u5f00\u5173\u7535\u6e90\u8f93\u5165\u548c\u8f93\u51fa\u7535\u8def\u4e2d\u52a0\u88c5\u7535\u78c1\u5e72\u6270\u6ee4\u6ce2\u5668\u3002<\/p>\n
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