{"id":2179,"date":"2019-03-06T13:37:58","date_gmt":"2019-03-06T13:37:58","guid":{"rendered":""},"modified":"2019-03-06T21:38:46","modified_gmt":"2019-03-06T13:38:46","slug":"%e7%ae%80%e5%8d%95%e7%9a%84%e9%80%86%e5%8f%98%e5%99%a8%e7%94%b5%e8%b7%af%e5%9b%be%e5%8f%8apwm%e9%80%86%e5%8f%98%e5%99%a8%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=2179","title":{"rendered":"\u7b80\u5355\u7684\u9006\u53d8\u5668\u7535\u8def\u56fe\u53caPWM\u9006\u53d8\u5668\u5de5\u4f5c\u539f\u7406"},"content":{"rendered":"

\n\t\u968f\u7740\u79d1\u6280\u7684\u5feb\u901f\u53d1\u5c55\uff0c\u9006\u53d8\u5668\u5df2\u7ecf\u8d8a\u6765\u8d8a\u591a\u7684\u51fa\u73b0\u5728\u4eba\u4eec\u7684\u751f\u6d3b\u4e2d\u3002\u76ee\u524d\uff0c\u9006\u53d8\u5668\u7684\u5df2\u7ecf\u5728\u5f88\u591a\u9886\u57df\u5e94\u7528\u5230\uff0c\u6bd4\u5982\u7535\u8111\u3001\u7535\u89c6\u3001\u6d17\u8863\u673a\u3001\u7a7a\u8c03\u3001\u5bb6\u5ead\u5f71\u9662\u3001\u7535\u52a8\u7802\u8f6e\u3001\u7535\u52a8\u5de5\u5177\u3001\u7f1d\u7eab\u673a\u3001\u5f55\u50cf\u673a\u3001\u6309\u6469\u5668\u3001\u98ce\u6247\u3001\u7167\u660e\u7b49\u7b49\u3002\u9006\u53d8\u5668\u662f\u4e00\u79cd\u80fd\u591f\u8fdb\u884c\u7535\u80fd\u8f6c\u6362\u7684\u5668\u4ef6\uff0c\u5f53\u8f93\u5165\u7684\u662f\u76f4\u6d41\u7535\u662f\uff0c\u8f93\u51fa\u5c31\u4f1a\u53d8\u6210\u4ea4\u6d41\u7535\uff0c\u800c\u4e14\u4e00\u822c\u662f\u4e3a220v50HZ\u6b63\u5f26\u6216\u65b9\u6ce2\u3002\u5b83\u4e0e\u5e94\u6025\u7535\u6e90\u7684\u5de5\u4f5c\u539f\u7406\u662f\u76f8\u53cd\u7684\uff0c\u9006\u53d8\u5668\u4e00\u822c\u7531\u63a7\u5236\u903b\u8f91\u3001\u6ee4\u6ce2\u7535\u8def\u548c\u9006\u53d8\u6865\u7ec4\u6210\u3002\u672c\u6587\u5c06\u9996\u5148\u4ecb\u7ecd\u4e8c\u6781\u7ba1\u5728\u9006\u53d8\u5668\u4e2d\u7684\u5e94\u7528\uff0c\u7136\u540e\u7ed3\u5408\u4e00\u79cd\u7b80\u5355\u7684\u9006\u53d8\u5668\u7535\u8def\u56fe\uff0c\u5177\u4f53\u5206\u6790PWM\u9006\u53d8\u5668\u7684\u5de5\u4f5c\u539f\u7406\u3002<\/p>\n

\n\t\u3000\u3000\u4e8c\u6781\u7ba1\u5728\u9006\u53d8\u5668\u4e2d\u7684\u5e94\u7528<\/strong><\/p>\n

\n\t\u3000\u3000\u5728\u5bb6\u7535\u5e94\u7528\u4e2d\uff0c\u6700\u4e3b\u8981\u7684\u5c31\u662f\u9ad8\u6548\u7387\u548c\u8282\u80fd\uff0c\u4e09\u76f8\u65e0\u5237\u76f4\u6d41\u7535\u673a\u6b63\u662f\u56e0\u4e3a\u5177\u6709\u6548\u7387\u9ad8\u3001\u5c3a\u5bf8\u5c0f\u7684\u4f18\u70b9\uff0c\u88ab\u5e7f\u6cdb\u7684\u5e94\u7528\u5728\u5bb6\u7535\u8bbe\u5907\u53ca\u5176\u4ed6\u5f88\u591a\u5e94\u7528\u4e2d\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u7531\u4e8e\u8fd8\u5c06\u673a\u68b0\u6362\u5411\u88c5\u7f6e\u66ff\u6362\u6210\u7535\u5b50\u6362\u5411\u5668\uff0c\u4e09\u76f8\u65e0\u5237\u7535\u673a\u8fdb\u800c\u88ab\u8ba4\u4e3a\u53ef\u9760\u6027\u6bd4\u539f\u6765\u66f4\u9ad8\u4e86\u3002<\/strong><\/p>\n

\n\t<\/strong><\/p>\n

\n\t\u3000\u3000\u6807\u51c6\u7684\u4e09\u76f8\u529f\u7387\u7ea7(power stage)\u88ab\u7528\u6765\u9a71\u52a8\u4e00\u4e2a\u4e09\u76f8\u65e0\u5237\u76f4\u6d41\u7535\u673a\uff0c\u5982\u56fe1\u6240\u793a\u3002\u529f\u7387\u7ea7\u4ea7\u751f\u4e00\u4e2a\u7535\u573a\uff0c\u4e3a\u4e86\u4f7f\u7535\u673a\u5f88\u597d\u5730\u5de5\u4f5c\uff0c\u8fd9\u4e2a\u7535\u573a\u5fc5\u987b\u4fdd\u6301\u4e0e\u8f6c\u5b50\u78c1\u573a\u4e4b\u95f4\u7684\u89d2\u5ea6\u63a5\u8fd1 90°\u3002\u516d\u6b65\u5e8f\u5217\u63a7\u5236\u4ea7\u751f6\u4e2a\u5b9a\u5b50\u78c1\u573a\u5411\u91cf\uff0c\u8fd9\u4e9b\u5411\u91cf\u5fc5\u987b\u5728\u4e00\u4e2a\u6307\u5b9a\u7684\u8f6c\u5b50\u4f4d\u7f6e\u4e0b\u6539\u53d8\u3002\u970d\u5c14\u6548\u5e94\u4f20\u611f\u5668\u626b\u63cf\u8f6c\u5b50\u7684\u4f4d\u7f6e\u3002\u4e3a\u4e86\u5411\u8f6c\u5b50\u63d0\u4f9b6\u4e2a\u6b65\u8fdb\u7535\u6d41\uff0c\u529f\u7387\u7ea7\u5229\u75286\u4e2a\u53ef\u4ee5\u6309\u4e0d\u540c\u7684\u7279\u5b9a\u5e8f\u5217\u5207\u6362\u7684\u529f\u7387MOSFET\u3002\u4e0b\u9762\u89e3\u91ca\u4e00\u4e2a\u5e38\u7528\u7684\u5207\u6362\u6a21\u5f0f\uff0c\u53ef\u63d0\u4f9b6\u4e2a\u6b65\u8fdb\u7535\u6d41\u3002<\/strong><\/p>\n

\n\t\u3000\u3000MOSFET Q1\u3001Q3\u548cQ5\u9ad8\u9891(HF)\u5207\u6362\uff0cQ2\u3001Q4\u548cQ6\u4f4e\u9891(LF)\u5207\u6362\u3002\u5f53\u4e00\u4e2a\u4f4e\u9891MOSFET\u5904\u4e8e\u5f00\u72b6\u6001\uff0c\u800c\u4e14\u4e00\u4e2a\u9ad8\u9891MOSFET \u5904\u4e8e\u5207\u6362\u72b6\u6001\u65f6\uff0c\u5c31\u4f1a\u4ea7\u751f\u4e00\u4e2a\u529f\u7387\u7ea7\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u6b65\u9aa41) \u529f\u7387\u7ea7\u540c\u65f6\u7ed9\u4e24\u4e2a\u76f8\u4f4d\u4f9b\u7535\uff0c\u800c\u5bf9\u7b2c\u4e09\u4e2a\u76f8\u4f4d\u672a\u4f9b\u7535\u3002\u5047\u8bbe\u4f9b\u7535\u76f8\u4f4d\u4e3aL1\u3001L2\uff0cL3\u672a\u4f9b\u7535\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cMOSFET Q1\u548cQ2\u5904\u4e8e\u5bfc\u901a\u72b6\u6001\uff0c\u7535\u6d41\u6d41\u7ecfQ1\u3001L1\u3001L2\u548cQ4\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u6b65\u9aa42) MOSFET Q1\u5173\u65ad\u3002\u56e0\u4e3a\u7535\u611f\u4e0d\u80fd\u7a81\u7136\u4e2d\u65ad\u7535\u6d41\uff0c\u5b83\u4f1a\u4ea7\u751f\u989d\u5916\u7535\u538b\uff0c\u76f4\u5230\u4f53\u4e8c\u6781\u7ba1D2\u88ab\u76f4\u63a5\u504f\u7f6e\uff0c\u5e76\u5141\u8bb8\u7eed\u6d41\u7535\u6d41\u6d41\u8fc7\u3002\u7eed\u6d41\u7535\u6d41\u7684\u8def\u5f84\u4e3aD2\u3001L1\u3001L2\u548cQ4\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u6b65\u9aa43) Q1\u6253\u5f00\uff0c\u4f53\u4e8c\u6781\u7ba1D2\u7a81\u7136\u53cd\u504f\u7f6e\u3002Q1\u4e0a\u603b\u7684\u7535\u6d41\u4e3a\u4f9b\u7535\u7535\u6d41\u4e0e\u4e8c\u6781\u7ba1D2\u4e0a\u7684\u6062\u590d\u7535\u6d41\u4e4b\u548c\u3002<\/strong><\/p>\n

\n\t <\/p>\n

\n\t\u3000\u3000\u663e\u793a\u51fa\u5176\u4e2d\u7684\u4f53-\u6f0f\u4e8c\u6781\u7ba1\u3002\u7535\u6d41\u6d41\u5165\u5230\u4f53-\u6f0f\u4e8c\u6781\u7ba1D2(\u89c1\u56fe1)\uff0c\u8be5\u4e8c\u6781\u7ba1\u88ab\u6b63\u5411\u504f\u7f6e\uff0c\u5c11\u6570\u8f7d\u6d41\u5b50\u6ce8\u5165\u5230\u4e8c\u6781\u7ba1\u7684\u533a\u548cP\u533a\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u5f53MOSFET Q1\u5bfc\u901a\u65f6\uff0c\u4e8c\u6781\u7ba1D2\u88ab\u53cd\u5411\u504f\u7f6e\uff0c N\u533a\u7684\u5c11\u6570\u8f7d\u6d41\u5b50\u8fdb\u5165P+\u4f53\u533a\uff0c\u53cd\u4e4b\u4ea6\u7136\u3002\u8fd9\u79cd\u5feb\u901f\u8f6c\u79fb\u5bfc\u81f4\u5927\u91cf\u7684\u7535\u6d41\u6d41\u7ecf\u4e8c\u6781\u7ba1\uff0c\u4eceN-epi\u5230P+\u533a\uff0c\u5373\u4ece\u6f0f\u6781\u5230\u6e90\u6781\u3002\u7535\u611fL1\u5bf9\u4e8e\u6d41\u7ecfQ2\u548cQ1\u7684\u5c16\u5cf0\u7535\u6d41\u8868\u73b0\u51fa\u9ad8\u963b\u6297\u3002Q1\u8868\u73b0\u51fa\u989d\u5916\u7684\u7535\u6d41\u5c16\u5cf0\uff0c\u589e\u52a0\u4e86\u5728\u5bfc\u901a\u671f\u95f4\u7684\u5f00\u5173\u635f\u8017\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u4e3a\u6539\u5584\u5728\u8fd9\u4e9b\u7279\u6b8a\u5e94\u7528\u4e2d\u4f53\u4e8c\u6781\u7ba1\u7684\u6027\u80fd\uff0c\u7814\u53d1\u4eba\u5458\u5f00\u53d1\u51fa\u5177\u6709\u5feb\u901f\u4f53\u4e8c\u6781\u7ba1\u6062\u590d\u7279\u6027MOSFET\u3002\u5f53\u4e8c\u6781\u7ba1\u5bfc\u901a\u540e\u88ab\u53cd\u5411\u504f\u7f6e\uff0c\u53cd\u5411\u6062\u590d\u5cf0\u503c\u7535\u6d41Irrm\u8f83\u5c0f\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u7ed3\u5408\u4e00\u79cd\u7b80\u5355\u7684\u9006\u53d8\u5668\u7535\u8def\u56fe\u5206\u6790PWM\u9006\u53d8\u5668\u7535\u8def\u7684\u5de5\u4f5c\u539f\u7406<\/strong><\/p>\n

\n\t<\/strong><\/p>\n

\n\t\u3000\u3000\u7535\u963bR2\u548c\u7535\u5bb9C1\u5957\u96c6\u6210\u7535\u8def\u5185\u90e8\u632f\u8361\u5668\u7684\u9891\u7387\u3002\u9884\u8bbeR1\u53ef\u7528\u4e8e\u632f\u8361\u5668\u7684\u9891\u7387\u8fdb\u884c\u5fae\u8c03\u300214\u811a\u548c11\u811aIC\u5185\u90e8\u9a71\u52a8\u6676\u4f53\u7ba1\u7684\u53d1\u5c04\u6781\u7ec8\u7aef\u3002\u7684\u9a71\u52a8\u6676\u4f53\u7ba1(\u5f15\u811a13\u548c12)\u7684\u96c6\u7535\u6781\u7ec8\u7aef\u8fde\u63a5\u5728\u4e00\u8d77\uff0c\u5e76\u8fde\u63a5\u52308 V\u8f68(7808\u8f93\u51fa)\u3002\u53ef\u5728IC\u7684\u5f15\u811a14\u548c15\u4e24\u4e2a180\u5ea6\uff0c\u6dd8\u6c7050\u8d6b\u5179\u8109\u51b2\u5217\u8f66\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u8fd9\u4e9b\u4fe1\u53f7\u9a71\u52a8\u5668\u5728\u968f\u540e\u7684\u6676\u4f53\u7ba1\u9636\u6bb5\u3002\u5f5314\u811a\u7684\u4fe1\u53f7\u4e3a\u9ad8\u7535\u5e73\uff0c\u6676\u4f53\u7ba1Q2\u63a5\u901a\uff0c\u5c31\u8fd9\u53cd\u8fc7\u6765\u53c8\u4f7f\u6676\u4f53\u7ba1Q4\uff0cQ5\uff0cQ6\u70b9\u4ece\u76ee\u524d\u7684+12 V\u7535\u6e90(\u7535\u6c60)\u8fde\u63a5\u6d41\u4e00\u4e2a\u901a\u8fc7\u7684\u4e0a\u534a\u90e8\u5206(\u4e0e\u6807\u7b7e\u7684\u6807\u8bb0)\u53d8\u538b\u5668(T1)\u4e2d\uff0c\u5c0f\u5b66\u901a\u8fc7\u6676\u4f53\u7ba1Q4\uff0cQ5\u548cQ6\u6c47\u5230\u5730\u9762\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u56e0\u6b64\u8bf1\u5bfc\u53d8\u538b\u5668\u4e8c\u6b21\u7535\u538b(\u7531\u4e8e\u7535\u78c1\u611f\u5e94)\uff0c\u8fd9\u4e2a\u7535\u538b220V\u8f93\u51fa\u6ce2\u5f62\u7684\u4e0a\u534a\u5468\u671f\u3002\u5728\u6b64\u671f\u95f4\uff0c11\u811a\u4f4e\uff0c\u5176\u6210\u529f\u7684\u9636\u6bb5\u5c06\u5904\u4e8e\u975e\u6d3b\u52a8\u72b6\u6001\u3002\u5f53IC\u5f15\u811a 11\u4e91\u9ad8\u7684\u7b2c\u4e09\u5b63\u5ea6\u7ed3\u679cQ7\u7684\u83b7\u53d6\u548c\u4ea4\u6362\uff0cQ8\u548cQ9\u5c06\u88ab\u6253\u5f00\u3002\u4ece+12 V\u7535\u6e90\u901a\u8fc7\u53d8\u538b\u5668\u7684\u521d\u7ea7\u4e0b\u534a\u90e8\u548c\u6c47\u5230\u5730\u9762\u901a\u8fc7\u6676\u4f53\u7ba1\u7684Q7\uff0cQ8\uff0cQ9\uff0c\u4ee5\u53ca\u7531\u6b64\u4ea7\u751f\u7684\u7535\u538b\uff0c\u5728T2\u6b21\u7ea7\u8bf1\u5bfc\u6709\u52a9\u4e8e\u7684\u4e0b\u534a\u90e8\u5468\u671f(\u6807\u7b7e\u4e0a\u6807\u660e)\u7535\u6d41\u6d41 220V\u8f93\u51fa\u6ce2\u5f62\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u9006\u53d8\u7535\u8def\u7684\u8f93\u51fa\u7535\u538b\u8c03\u8282\u90e8\u5206\u7684\u5de5\u4f5c\u539f\u7406<\/strong><\/p>\n

\n\t\u3000\u3000\u9006\u53d8\u5668\u8f93\u51fa(T2\u7684\u8f93\u51fa)\u6316\u6398\u70b9\u7684\u6807\u8bb0\u4e3aB\uff0cC\uff0c\u5e76\u63d0\u4f9b\u7ed9\u53d8\u538b\u5668T2\u7684\u4e3b\u3002\u5728\u53d8\u538b\u5668T2\u7684\u4e0b\u964d\u8fd9\u4e2a\u9ad8\u7535\u538b\u7684\u6b65\u9aa4\uff0c\u6865\u6881D5\u6574\u6d41\u5b83\u548c\u8fd9\u4e2a\u7535\u538b(\u5c06\u9006\u53d8\u5668\u7684\u8f93\u51fa\u7535\u538b\u6210\u6b63\u6bd4)\u662f\u63d0\u4f9b\u7684PIN1\u901a\u8fc7\u5965\u8feaR8\uff0cR9\uff0cR16\u548c(\u8be5IC\u7684\u5185\u90e8\u9519\u8bef\u653e\u5927\u5668\u7684\u53cd\u76f8\u8f93\u5165)\u8fd9\u4e2a\u7535\u538b\u4e0e\u5185\u90e8\u53c2\u8003\u7535\u538b\u6bd4\u8f83\u3002<\/strong><\/p>\n

\n\t\u3000\u3000\u6b64\u8bef\u5dee\u7535\u538b\u6210\u6b63\u6bd4\u7684\u8f93\u51fa\u7535\u538b\u6240\u9700\u7684\u503c\u548cIC\u8c03\u8282\u5360\u7a7a\u6bd4\u7684\u9a71\u52a8\u4fe1\u53f7(\u5f15\u811a14\u548c12)\u4e3a\u4e86\u4f7f\u8f93\u51fa\u7535\u538b\u4e3a\u6240\u9700\u7684\u503c\u7684\u53d8\u5316\u3002R9\u7684\u9884\u8bbe\uff0c\u53ef\u7528\u4e8e\u8c03\u8282\u9006\u53d8\u5668\u8f93\u51fa\u7535\u538b\uff0c\u56e0\u4e3a\u5b83\u76f4\u63a5\u63a7\u5236\u53d8\u9891\u5668\u7684\u8f93\u51fa\u7535\u538b\u8bef\u5dee\u653e\u5927\u5668\u90e8\u5206\u7684\u53cd\u9988\u91cf\u3002<\/strong><\/p>\n

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