\u6709\u5f88\u591a\u670b\u53cb\u7ecf\u5e38\u53d7\u5230\u653e\u5927\u5668\u7684\u300c\u7535\u6d41\u58f0\u300d\u56f0\u6270\uff0c\u5927\u90e8\u4efd\u670b\u53cb\u90fd\u8ba4\u4e3a\u7535\u6d41\u58f0\u662f\u56e0\u4e3a\u63a5\u5730\u4e0d\u826f\u6240\u81f4\uff0c\u4e8e\u662f\u4fbf\u52aa\u529b\u628a\u653e\u5927\u5668\u7684\u5916\u58f3\u63a5\u5730\uff0c\u751a\u81f3\u628a\u6574\u4e2a\u653e\u5927\u5668\u7528\u91d1\u5c5e\u7f69\u5b50\u5c4f\u853d\uff0c\u4f46\u7535\u6d41\u58f0\u4f9d\u65e7\uff0c\u82e6\u65e0\u5bf9\u7b56\u2026\u2026<\/p>\n
<\/p>\n
\u5404\u4eba\u5bf9\u300c\u7535\u6d41\u58f0\u300d\u5b9a\u4e49\u4e0d\u4e00\uff0c\u5148\u8981\u627e\u51fa\u4f60\u9047\u4e0a\u54ea\u4e00\u79cd\u300c\u7535\u6d41\u58f0\u300d\u3002<\/p>\n
\u8d85\u8fc7\u4e00\u534a\u7684\u60c5\u51b5\u4e0b\uff0c\u90fd\u4e0d\u662f\u63a5\u5730\u51fa\u4e86\u95ee\u9898\u3002\u300c\u7535\u6d41\u58f0\u300d\u66f4\u52a0\u4e0d\u662f\u7531\u9759\u7535\u5f15\u8d77\u3002<\/p>\n
\u4f46\u7efc\u89c2\u4e0d\u540c\u670b\u53cb\u7684\u63cf\u8ff0\uff0c\u300c\u7535\u6d41\u58f0\u300d\u90fd\u662f\uff1a<\/p>\n
\u25cf \u8fde\u7eed\u4e0d\u65ad\u7684\u566a\u97f3<\/p>\n
\u25cf \u566a\u97f3\u7684\u54cd\u5ea6\u9887\u4e3a\u7a33\u5b9a<\/p>\n
\u25cf \u901a\u5e38\u90fd\u662f\u4f4e\u9891\u566a\u97f3<\/p>\n
\u7efc\u5408\u5404\u65b9\u670b\u53cb\u7684\u906d\u9047\uff0c\u300c\u7535\u6d41\u58f0\u300d\u53ef\u7b3c\u7edf\u5f52\u7eb3\u4e3a\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\u5f15\u81f4\uff1a<\/p>\n
\u7535\u6e90\u6d9f\u6ce2\u566a\u97f3 (Ripple noise) \uff0c\u5373\u4ea4\u6d41\u554d\u58f0 (Humming)<\/p>\n
\u611f\u5e94\u566a\u58f0 (Pick-up noise) \u5305\u62ec\u4eba\u4f53\u62fe\u6ce2\u566a\u58f0 (Body pick-up)<\/p>\n
\u7ebf\u8def\u677f\u8d70\u7ebf (Layout) \u6216\u63a5\u5730\u5e03\u5c40 (Grounding topology)<\/p>\n
\u4e0d\u826f\u5730\u7ebf\u566a\u97f3 (Ground noise) \u53ca\u5faa\u73af\u63a5\u5730 (Ground loop)<\/p>\n
\u673a\u5185\u5e03\u7ebf\u53ca\u5c4f\u853d\u7b56\u7565\u4e0d\u826f (Bad wiring and shielding strategy)<\/p>\n
\u4ea4\u6d41\u554d\u58f0<\/p>\n
\u4ea4\u6d41\u554d\u58f0\u7684\u6210\u56e0\u662f\u7535\u6e90\u6ee4\u6ce2\u5668\u8bbe\u8ba1\u4e0d\u5f53\uff0c\u751a\u6216\u5077\u5de5\u51cf\u6599\uff0c\u5bfc\u81f4\u5e02\u7535\u7684\u4ea4\u6d41\u7535\u8baf\u53f7\u6709\u4e00\u90e8\u4efd\u6e9c\u8fdb\u4e86\u653e\u5927\u5668\u3002\u8fd9\u79cd\u7535\u6d41\u58f0\u7684\u7279\u8272\u662f\u9891\u7387\u5f88\u4f4e\uff0c\u5927\u90e8\u4efd\u60c5\u51b5\u4e0b\u90fd\u5f88\u5fae\u5f31\uff0c\u8981\u628a\u8033\u6735\u8d34\u7740\u626c\u58f0\u5668\u624d\u542c\u5230\uff0c\u800c\u4e14\u5373\u4f7f\u628a\u97f3\u91cf\u8c03\u5230\u6700\u4f4e\uff0c\u566a\u97f3\u4f9d\u7136\u5b58\u5728\u3002<\/p>\n
\u6ee4\u6ce2\u7535\u5bb9 (\u6c34\u5858)\uff0c\u9664\u4e86\u5bb9\u91cf\u6108\u5927\u6108\u597d\u5916\uff0c\u5176\u7b49\u6548\u4e32\u8054\u7535\u963b (ESR) \u4e5f\u662f\u6108\u5c0f\u6108\u597d!\u8fd9\u662f\u7535\u6d41\u58f0\u4e2d\u6700\u5e38\u89c1\u7684\u4e00\u79cd\u3002\u4e00\u822c\u60c5\u51b5\u4e0b\u4e00\u4e9b\u5e73\u4ef7\u7684\u5c71\u5be8\u653e\u5927\u5668\u8f83\u6613\u9047\u5230\u8fd9\u79cd\u60c5\u51b5\uff0c\u53cd\u800c DIY \u7684\u653e\u5927\u5668\u8f83\u5c11\u9047\u4e0a\u8fd9\u95ee\u9898\uff0c\u4e3a\u751a\u4e48\u5462?\u56e0\u4e3a\u8fd9\u79cd\u7535\u6d41\u58f0\u6700\u666e\u904d\u7684\u6210\u56e0\u662f\u7535\u6e90\u6ee4\u6ce2\u5668\u7528\u6599\u4e0d\u8db3\uff0c\u6ee4\u6ce2\u7535\u5bb9\u5668\u7684\u5bb9\u91cf\u4e0d\u8db3\uff0c\u4e00\u4e9b\u5e73\u4ef7\u4ea7\u54c1\u56e0\u4e3a\u541d\u556c\u4e8e\u6602\u8d35\u7684\u5927\u5bb9\u91cf\u7535\u5bb9\u5668 (\u4fd7\u79f0\u6c34\u5858)\uff0c\u6240\u4ee5\u6bd4 DIY \u653e\u5927\u5668\u66f4\u5bb9\u6613\u51fa\u73b0\u95ee\u9898(\u56e0\u4e3a\u4e00\u822c\u4eba DIY \u90fd\u4f1a\u4e0d\u60dc\u5de5\u672c)\u3002<\/p>\n
\u5982\u4f55\u89e3\u51b3\u8fd9\u79cd\u7535\u6d41\u58f0?\u90a3\u8981\u770b\u770b\u4f60\u7684\u653e\u5927\u5668\u662f\u4f7f\u7528\u5916\u7f6e\u8fd8\u662f\u5185\u7f6e\u53d8\u538b\u5668(\u706b\u725b)\uff0c\u5982\u679c\u662f\u4f7f\u7528\u5185\u7f6e\u53d8\u538b\u5668\uff0c\u60c5\u51b5\u8f83\u4e3a\u590d\u6742\uff0c\u9700\u8981\u628a\u6c34\u5858\u6362\u4e0a\u66f4\u5927\u5bb9\u503c\u7684\u7535\u5bb9\u5668\uff0c\u751a\u81f3\u589e\u52a0\u7535\u5bb9\u5668\u7684\u6570\u76ee\uff0c\u6570\u53ea\u7535\u5bb9\u5668\u5e76\u8054\u65f6\u5176\u5bb9\u503c\u4f1a\u76f8\u52a0\uff0c\u4f46\u8fd9\u79cd\u65b9\u6cd5\u4f1a\u53d7\u5230\u673a\u5185\u7a7a\u95f4\u6240\u9650\uff0c\u9700\u8981\u968f\u673a\u5e94\u53d8\u3002<\/p>\n
\u7531\u4e8e\u8fd9\u4e2a\u566a\u97f3\u7684\u9891\u7387\u5f88\u4f4e(100Hz)\uff0c\u800c\u4e14\u901a\u5e38\u90fd\u5f88\u8f7b\u5fae\uff0c\u82e5\u78b0\u4e0a\u5c0f\u53e3\u5f84\u7684\u626c\u58f0\u5668\uff0c\u8fd9\u4e9b\u5ec9\u4ef7\u653e\u5927\u5668\u5f80\u5f80\u53ef\u4ee5\u8499\u6df7\u8fc7\u5173\uff0c\u4e0d\u8fc7\u60f3\u68c0\u6d4b\u7535\u6e90\u6d9f\u6ce2\u566a\u97f3\uff0c\u6709\u4e00 \u4e2a\u5f88\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u53ea\u8981\u5728\u653e\u5927\u5668\u5f00\u542f\u65f6\u7528\u624b\u6478\u4e00\u6478\u4f4e\u9891\u5355\u5143\u7684\u9707\u819c\uff0c\u82e5\u5728\u65e0\u8baf\u53f7\u6216\u97f3\u91cf\u8c03\u5230\u6700\u4f4e\u65f6\u4ecd\u611f\u53d7\u5230\u626c\u58f0\u5668\u7684\u9707\u819c\u9707\u52a8\uff0c\u8fd9\u4fbf\u662f\u4e00\u4e2a\u5f88\u660e\u663e\u7684\u4ea4\u6d41\u554d\u58f0\u7684\u8bc1 \u636e\u3002<\/p>\n
\u5982\u679c\u662f\u7528\u5916\u7f6e\u53d8\u538b\u5668(\u4f8b\u5982\u4e00\u822c\u8ff7\u4f60\u653e\u5927\u5668)\uff0c\u5f53\u7136\u4ee5\u4e0a\u7684\u65b9\u6cd5\u90fd\u9002\u7528\uff0c\u4f46\u6709\u53e6\u4e00\u4e2a\u66f4\u7b80\u5355\u7684\u505a\u6cd5\u2500\u2500\u6362\u4e0a\u4e00\u4e2a\u5f00\u5173\u5f0f\u7535\u6e90\u53d8\u538b\u5668(SMPS) \uff0c\u95ee\u9898\u4fbf\u4f1a\u8fce\u5203\u800c\u89e3!<\/p>\n
\u5f88\u60ca\u8bb6\u5427!\u9996\u5148\u5f00\u5173\u7535\u6e90\u7684\u97f3\u8d28\u662f\u4e0d\u662f\u5f88\u5dee\uff0c\u4f46\u662f\u5355\u5c31\u89e3\u51b3\u4ea4\u6d41\u554d\u58f0\uff0c\u5f00\u5173\u5f0f\u6e90\u53d8\u538b\u5668\u7684\u786e\u6709\u7acb\u7aff\u89c1\u5f71\u4e4b\u6548\u3002(\u5f53\u7136\u4f7f\u7528\u5f00\u5173\u7535\u6e90\u53ef\u80fd\u4f1a\u8bf1\u53d1\u53e6\u4e00\u95ee\u9898\uff0c\u5f80\u540e\u6709\u673a\u4f1a\u518d\u8be6\u7ec6\u63a2\u8ba8\u3002)<\/p>\n
\u539f\u7406\uff1a<\/p>\n
\u6211\u4eec\u7528\u7684\u5e02\u7535\u4e3a\u4ea4\u6d41\u7535\uff0c\u4f46\u662f\u653e\u5927\u5668\u5fc5\u987b\u4ee5\u76f4\u6d41\u7535\u64cd\u4f5c\uff0c\u6240\u4ee5\u7535\u6e90\u53d8\u538b\u5668(\u706b\u725b)\u9664\u4e86\u8d1f\u8d23\u628a 220V \u7684\u7535\u538b\u5347\/\u964d\u81f3\u5408\u9002\u7684\u7535\u538b\u4e4b\u5916\uff0c\u8fd8\u62c5\u4efb\u7740\u628a\u4ea4\u6d41\u7535\u8f6c\u53d8\u6210\u76f4\u6d41\u7535\u7684\u89d2\u8272\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u53eb\u300c\u6574\u6d41\u300d\u3002\u5728\u653e\u5927\u5668\u5185\u6700\u5e38\u89c1\u7684\u6574\u6d41\u65b9\u5f0f\u4e3a\u300c\u6865\u5f0f\u6574\u6d41\u300d\uff0c\u6865\u5f0f\u6574\u6d41\u4f1a\u628a\u5e02\u7535 \u7684\u4ea4\u6d41\u7535\u53d8\u6210\u53d8\u5316\u4e0d\u5b9a\u7684\u76f4\u6d41\u7535\uff0c\u6280\u672f\u4e00\u70b9\u6765\u8bf4\uff0c\u8fd9\u662f\u4e00\u4e2a\u5305\u542b\u7740 50Hz x 2 = 100Hz \u4ea4\u6d41\u8baf\u53f7\u7684\u76f4\u6d41\u7535\u6e90\uff0c\u6211\u4eec\u79f0\u4e4b\u4e4b\u4e3a\u300c\u6d9f\u6ce2\u300d\uff0c\u800c\u8fd9\u4e2a 100Hz \u7684\u6d9f\u6ce2\u82e5\u672a\u80fd\u6e05\u9664\u6389\uff0c\u4fbf\u4f1a\u8ba9\u5b83\u6e9c\u5230\u626c\u58f0\u5668\uff0c\u5f62\u6210\u566a\u97f3\uff0c\u7531\u4e8e\u8fd9\u4e9b\u6d9f\u6ce2\u7684\u9891\u7387\u90fd\u5f88\u4f4e\uff0c\u6240\u4ee5\u9700\u8981\u5f88\u5927\u5bb9\u91cf\u7684\u6ee4\u6ce2\u7535\u5bb9 (\u6c34\u5858) \u6765\u628a\u5176\u5438\u6389\u3002<\/p>\n
\u4e3a\u4f55\u5f00\u5173\u5f0f\u7535\u6e90\u53d8\u538b\u5668\u53ef\u89e3\u51b3\u4ea4\u6d41\u554d\u58f0?\u56e0\u4e3a\u5f00\u5173\u7535\u6e90\u7684\u64cd\u4f5c\u9891\u7387\u5e76\u4e0d\u662f 50Hz \u6216 60Hz\uff0c\u800c\u662f\u52a8\u8f84\u8fc7\u5341\u4e07Hz\uff0c\u6108\u9ad8\u9891\u7684\u6d9f\u6ce2\u6108\u6613\u88ab\u6c34\u5858\u5438\u6536 (\u4f46\u592a\u9ad8\u53c8\u53cd\u800c\u5438\u4e0d\u6389)\uff0c\u51b5\u4e14\u5b83\u7684\u64cd\u4f5c\u9891\u7387\u8fdc\u8d85\u4e8e\u8033\u6735\u53ca\u626c\u58f0\u5668\u7684\u5de5\u4f5c\u8303\u56f4\uff0c\u6240\u4ee5\u7535\u6e90\u7684\u6d9f\u6ce2\u566a\u97f3\u4e00\u4e0d\u80fd\u5728\u626c\u58f0\u5668\u4e0a\u518d\u751f (\u9891\u7387\u592a\u9ad8)\uff0c\u4e8c\u66f4\u4e0d\u80fd\u88ab\u8033\u6735\u63a5\u6536\u518d\u4f20\u5230\u5927\u8111 (\u90fd\u662f\u9891\u7387\u592a\u9ad8)\uff0c\u90a3\u53c8\u4f55\u6765\u566a\u97f3?<\/p>\n
\u5176\u4ed6\u6210\u56e0\uff1a<\/p>\n
1. \u6ee4\u6ce2\u7535\u5bb9\u5931\u6548(\u4fd7\u79f0\u5e72\u5858)<\/p>\n
\u7531\u4e8e\u6ee4\u6ce2\u7535\u5bb9\u6210\u672c\u9ad8\u3001\u4f53\u79ef\u5927\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u90fd\u4e0d\u4f1a\u9009\u7528\u8010\u9ad8\u6e29\u7684\u7535\u5bb9\uff0c\u6240\u4ee5\u5728\u53d1\u70ed\u91cf\u9ad8\u7684\u529f\u7387\u653e\u5927\u5668\u4e2d\uff0c\u6c34\u5858\u5f80\u5f80\u4f1a\u662f\u5bff\u547d\u8f83\u77ed\u7684\u96f6\u4ef6\u3002<\/p>\n
2. \u8f93\u51fa\u529f\u7387\u7ba1\u504f\u7f6e\u7535\u6d41\u5931\u8c03<\/p>\n
\u8f93\u51fa\u529f\u7387\u7ba1\u9700\u8981\u5728\u4e00\u5b9a\u7684\u504f\u7f6e\u7535\u6d41\u4e0b\u64cd\u4f5c\uff0c\u82e5\u6b64\u7535\u6d41\u503c\u56e0\u79cd\u79cd\u539f\u56e0\u589e\u52a0\u4e86\uff0c\u5bfc\u81f4\u653e\u5927\u5668\u7684\u9759\u6001\u7535\u6d41\u4e0d\u5bfb\u5e38\u5730\u4e0a\u5347\uff0c\u4e5f\u4f1a\u589e\u52a0\u6c34\u5858\u7684\u8d1f\u8377\uff0c\u4ece\u800c\u52a0\u5f3a\u4e86\u4ea4\u6d41\u554d\u58f0\u3002<\/p>\n
3. \u8baf\u53f7\u5730 (Signal ground) \u4e0e\u5927\u5730 (Earth) \u5373\u5730\u7ebf\u63a5\u4e0a\u4e86\uff0c\u8fd9\u4e2a\u60c5\u51b5\u6211\u4eec\u4f1a\u5728 Ground loop \u90e8\u4efd\u8be6\u7ec6\u5206\u6790\u3002<\/p>\n
4. \u53d8\u538b\u5668\u7684\u7535\u78c1\u5e72\u6270\uff0c\u8fd9\u4e2a\u60c5\u51b5\u4f1a\u5728 Wiring and shielding \u90e8\u4efd\u8be6\u7ec6\u5206\u6790\u3002<\/p>\n
\u5907\u6ce8\uff1a<\/p>\n
\u6ee4\u6ce2\u5668\u7684\u89c4\u6a21\u968f\u7740\u653e\u5927\u5668\u6d88\u8017\u7684\u7535\u6d41\u91cf\u800c\u63d0\u5347\u3002<\/p>\n
\u7532\u7c7b\u653e\u5927\u5668\u56e0\u9700\u8981\u5e9e\u5927\u7684\u9759\u6001\u7535\u6d41\uff0c\u56e0\u800c\u4ee4\u7535\u6e90\u6d9f\u6ce2\u566a\u97f3\u66f4\u6613\u88ab\u5bdf\u89c9\uff0c\u6240\u4ee5\u6ee4\u6ce2\u5668\u7684\u89c4\u6a21\u5f80\u5f80\u5f88\u5927\u3002<\/p>\n
\u7535\u5bb9\u5668\u7684\u7b49\u6548\u4e32\u8054\u7535\u963b (ESR) \u6108\u4f4e\uff0c\u5176\u6ee4\u6ce2\u6027\u80fd\u6108\u4f73\u3002<\/p>\n
\u9664\u4e86\u5e76\u8054\u7535\u5bb9\u5668\u4ee5\u589e\u52a0\u7535\u91cf\u5bb9\uff0c\u4e5f\u53ef\u4ee5\u4e32\u8054\u7535\u611f\u5668\u4f5c LC \u751a\u81f3 Pi \u5f62 (\u03c0) \u6ee4\u6ce2\uff0c\u4f46\u6210\u672c\u8f83\u9ad8\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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