{"id":1219,"date":"2018-10-26T10:13:34","date_gmt":"2018-10-26T10:13:34","guid":{"rendered":""},"modified":"2018-10-26T18:14:06","modified_gmt":"2018-10-26T10:14:06","slug":"%e5%8f%8c%e6%9e%81%e6%80%a7pwm%e5%8e%9f%e7%90%86%e5%9b%be%e5%88%86%e6%9e%90+%e5%8f%8c%e6%9e%81%e6%80%a7pwm%e5%ba%94%e7%94%a8%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=1219","title":{"rendered":"\u53cc\u6781\u6027pwm\u539f\u7406\u56fe\u5206\u6790 \u53cc\u6781\u6027pwm\u5e94\u7528\u8be6\u89e3"},"content":{"rendered":"

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\n\t\u3000\u3000\u53cc\u6781\u6027pwm\u539f\u7406<\/h2>\n

\n\t\u3000\u3000PWM\uff08Pulse Widt<\/u>h Modulati<\/u>on\uff09\u63a7\u5236\u5c31\u662f\u5bf9\u8109\u51b2\u7684\u5bbd\u5ea6\u8fdb\u884c\u8c03\u5236\u7684\u6280\u672f\u3002\u5373\u901a\u8fc7\u5bf9\u4e00\u7cfb\u5217\u8109\u51b2\u7684\u5bbd\u5ea6\u8fdb\u884c\u8c03\u5236\uff0c\u6765\u7b49\u6548\u5730\u83b7\u5f97\u6240\u9700\u8981\u7684\u6ce2\u5f62\u3002PWM\u63a7\u5236\u6280\u672f\u5728\u9006\u53d8\u7535\u8def\u4e2d\u7684\u5e94\u7528\u6700\u4e3a\u5e7f\u6cdb\uff0c\u5bf9\u9006\u53d8\u7535\u8def\u7684\u5f71\u54cd\u4e5f\u6700\u4e3a\u6df1\u523b\uff0cPWM\u63a7\u5236\u6280\u672f\u5728\u9006\u53d8\u7535\u8def\u4e2d\u7684\u5e94\u7528\u4e5f\u6700\u5177\u4ee3\u8868\u6027\u3002 <\/p>\n

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\n\t\u3000\u3000\"\u53cc\u6781\u6027pwm\u539f\u7406\u56fe\u5206\u6790<\/p>\n

\n\t\u3000\u3000SPWM\u65b9\u6cd5\u7684\u57fa\u672c\u539f\u7406<\/h2>\n

\n\t\u3000\u3000\u5177\u6709\u7b49\u5e45\u548c\u6b63\u5f26\u5bbd\u5ea6\u7684PWM\u6ce2\u88ab\u79f0\u4e3aSPWM\uff08\u6b63\u5f26PWM\uff09\u6ce2\u5f62\u3002\u5b83<\/p>\n

\n\t\u3000\u3000\u5982\u56fe1.1.2\u6240\u793a\uff0c\u901a\u8fc7\u5c06\u6b63\u5f26\u534a\u6ce2\u5206\u6210N\u4e2a\u76f8\u7b49\u7684\u90e8\u5206\uff0c\u6b63\u5f26\u534a\u6ce2\u53ef\u4ee5\u770b\u4f5c\u662f\u7531N\u4e2a\u8109\u51b2\u5e8f\u5217\u7ec4\u6210\u7684\u6ce2\u5f62\uff0c\u8fd9\u4e9b\u8109\u51b2\u5e8f\u5217\u7684\u8109\u51b2\u5bbd\u5ea6\u7b49\u4e8eN\/\uff0c\u4f46\u5e45\u5ea6\u4e0d\u540c\uff0c\u5e76\u4e14\u8109\u51b2\u7684\u9876\u90e8\u4e0d\u662f\u6c34\u5e73\u7ebf\u3002\uff0c\u800c\u662f\u6b63\u5f26\u66f2\u7ebf\u3002\u5982\u679c\u8fd9\u4e9b\u8109\u51b2\u5e8f\u5217\u88ab\u76f8\u540c\u6570\u91cf\u7684\u7b49\u5e45\u548c\u4e0d\u7b49\u5bbd\u7684\u77e9\u5f62\u8109\u51b2\u4ee3\u66ff\uff0c\u5219\u77e9\u5f62\u8109\u51b2\u7684\u4e2d\u70b9\u4e0e\u4e2d\u70b9\u7684\u76f8\u5e94\u6b63\u5f26\u90e8\u5206\u91cd\u5408\uff0c\u5e76\u4e14\u77e9\u5f62\u8109\u51b2\u7684\u9762\u79ef\u548c\u76f8\u5e94\u7684\u6b63\u5f26\u90e8\u5206\u76f8\u7b49\u3002\u56fe\u4e2d\u6240\u793a\u7684\u77e9\u5f62\u8109\u51b2\u5e8f\u5217\u79f0\u4e3aSPWM\u6ce2\u5f62\u3002<\/p>\n

\n\t\u3000\u3000\"\u53cc\u6781\u6027pwm\u539f\u7406\u56fe\u5206\u6790<\/p>\n

\n\t\u3000\u3000\u53cc\u6781\u6027pwm\u63a7\u5236\u65b9\u5f0f<\/h2>\n

\n\t\u3000\u3000a\uff09\u5728ru\u7684\u534a\u4e2a\u5468\u671f\u5185\uff0c\u4e09\u89d2\u6ce2\u8f7d\u6ce2\u6709\u6b63\u6709\u8d1f\uff0c\u6240\u5f97\u7684PWM\u6ce2\u4e5f\u6709\u6b63\u6709\u8d1f\uff0c\u5728ru\u7684\u4e00\u4e2a\u5468\u671f\u5185\uff0c\u8f93\u51fa\u7684PWM\u6ce2\u53ea\u6709±dU\u4e24\u79cd\u7535\u5e73\u3002 <\/p>\n

\n\t\u3000\u3000b\uff09\u5728ru\u7684\u6b63\u8d1f\u534a\u5468\uff0c\u5bf9\u5404\u4e2a\u5f00\u5173\u5668\u4ef6\u7684\u63a7\u5236\u89c4\u5f8b\u76f8\u540c\u3002\u5f53ru\u300bcu\u65f6\uff0c1V\u548c4<\/p>\n

\n\t\u3000\u3000V\u5bfc\u901a\uff0c2V\u548c3V\u5173\u65ad\uff0c\u8fd9\u65f6\u5982\u679coi\u300b0\uff0c\u52191V\u548c4V\u5bfc\u901a\uff0c\u5982\u679coi\u300a0\uff0c\u52191VD\u548c4VD\u5bfc\u901a\uff0c\u4f46\u4e0d\u7ba1\u90a3\u79cd\u60c5\u51b5\u90fd\u662fou=dU\u3002\u5f53ru\u300acu\u65f6\uff0c2V\u548c3V\u5bfc\u901a\uff0c1V\u548c4V\u5173\u65ad\uff0c\u8fd9\u65f6\u5982\u679coi\u300a0\uff0c\u52192V\u548c3V\u5bfc\u901a\uff0c\u5982\u679coi\u300b0\uff0c\u52192VD\u548c3VD\u5bfc\u901a\uff0c\u4f46\u662f\u4e0d\u7ba1\u54ea\u79cd\u60c5\u51b5\u90fd\u662fou= -dU\u3002<\/p>\n

\n\t\u3000\u3000\"\u53cc\u6781\u6027pwm\u539f\u7406\u56fe\u5206\u6790<\/p>\n

\n\t\u3000\u3000\u53cc\u6781\u6027PWM\u6a21\u5f0f<\/strong><\/p>\n

\n\t\u3000\u3000\u53cc\u6781\u6027PWM\u63a7\u5236\u6a21\u5f0f\u91c7\u7528\u7684\u662f\u6b63\u8d1f\u4ea4\u53d8\u7684\u53cc\u6781\u6027\u4e09\u89d2\u8f7d\u6ce2ut\u4e0e\u8c03\u5236\u6ce2ur\uff0c\u5982\u56fe6.3\u6240\u793a\uff0c\u53ef\u901a\u8fc7ut\u4e0eur\uff0c\u7684\u6bd4\u8f83\u76f4\u63a5\u5f97\u5230\u53cc\u6781\u6027\u7684PWM\u8109\u51b2\uff0c\u800c\u4e0d\u9700\u8981\u5012\u76f8\u7535\u8def\u3002<\/p>\n

\n\t\u3000\u3000\"\u53cc\u6781\u6027pwm\u539f\u7406\u56fe\u5206\u6790<\/p>\n

\n\t\u3000\u3000\u4e0e\u5355\u6781\u6027\u6a21\u5f0f\u76f8\u6bd4\uff0c\u53cc\u6781\u6027PWM\u6a21\u5f0f\u63a7\u5236\u7535\u8def\u548c\u4e3b\u7535\u8def\u6bd4\u8f83\u7b80\u5355\uff0c\u7136\u800c\u5bf9\u6bd4\u56fe6.2\uff08d\uff09\u548c\u56fe6.3\uff08b\uff09\u53ef\u770b\u51fa\uff0c\u5355\u6781\u6027PWM\u6a21\u5f0f\u8981\u6bd4\u53cc\u6781\u6027PWM\u6a21\u5f0f\u8f93\u51fa\u7535\u538b\u4e2d\u3001\u9ad8\u6b21\u8c10\u6ce2\u5206\u91cf\u5c0f\u5f97\u591a\uff0c\u8fd9\u662f\u5355\u6781\u6027\u6a21\u5f0f\u7684\u4e00\u4e2a\u4f18\u70b9\u3002<\/p>\n

\n\t\u3000\u3000\u5355\u6781\u6027\u8c03\u5236\u65b9\u5f0f\u7684\u7279\u70b9\u662f\u5728\u4e00\u4e2a\u5f00\u5173\u5468\u671f\u5185\u4e24\u53ea\u529f\u7387\u7ba1\u4ee5\u8f83\u9ad8\u7684\u5f00\u5173\u9891\u7387\u4e92\u8865\u5f00\u5173\uff0c\u4fdd\u8bc1\u53ef\u4ee5\u5f97\u5230\u7406\u60f3\u7684\u6b63\u5f26\u8f93\u51fa\u7535\u538b\uff1a\u53e6\u4e24\u53ea\u529f\u7387\u7ba1\u4ee5\u8f83\u4f4e\u7684\u8f93\u51fa\u7535\u538b\u57fa\u6ce2\u9891\u7387\u5de5\u4f5c\uff0c\u4ece\u800c\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u51cf\u5c0f\u4e86\u5f00\u5173\u635f\u8017\u3002\u4f46\u53c8\u4e0d\u662f\u56fa\u5b9a\u5176\u4e2d\u4e00\u4e2a\u6865\u81c2\u59cb\u7ec8\u4e3a\u4f4e\u9891\uff08\u8f93\u51fa\u57fa\u9891\uff09\uff0c\u53e6\u4e00\u4e2a\u6865\u81c2\u59cb\u7ec8\u4e3a\u9ad8\u9891\uff3b\u8f7d\u6ce2\u9891\u7387\uff09\uff0c\u800c\u662f\u6bcf\u534a\u4e2a\u8f93\u51fa\u7535\u538b\u5468\u671f\u5207\u6362\u5de5\u4f5c\uff0c\u5373\u540c\u4e00\u4e2a\u6865\u81c2\u5728\u524d\u534a\u4e2a\u5468\u671f\u5de5\u4f5c\u5728\u4f4e\u9891\uff0c\u800c\u5728\u540e\u534a\u5468\u5219\u5de5\u4f5c\u5728\u9ad8\u9891\uff0c\u8fd9\u6837\u53ef\u4ee5\u4f7f\u4e24\u4e2a\u6865\u81c2\u7684\u529f\u7387\u7ba1\u5de5\u4f5c\u72b6\u6001\u5747\u8861\uff0c\u5bf9\u4e8e\u9009\u7528\u540c\u6837\u7684\u529f\u7387\u7ba1\u65f6\uff0c\u4f7f\u5176\u4f7f\u7528\u5bff\u547d\u5747\u8861\uff0c\u5bf9\u589e\u52a0\u53ef\u9760\u6027\u6709\u5229\u3002<\/p>\n

\n\t\u3000\u3000\u53cc\u6781\u6027\u8c03\u5236\u65b9\u5f0f\u7684\u7279\u70b9\u662f4\u4e2a\u529f\u7387\u7ba1\u90fd\u5de5\u4f5c\u5728\u8f83\u9ad8\u9891\u7387\uff08\u8f7d\u6ce2\u9891\u7387\uff09\uff0c\u867d\u7136\u80fd\u5f97\u5230\u6b63\u5f26\u8f93\u51fa\u7535\u538b\u6ce2\u5f62\uff0c\u4f46\u5176\u4ee3\u4ef7\u662f\u4ea7\u751f\u4e86\u8f83\u5927\u7684\u5f00\u5173\u635f\u8017\u3002<\/p>\n

\n\t\u3000\u3000\u53cc\u6781\u6027pwm\u539f\u7406\u56fe\u5206\u6790<\/h2>\n

\n\t\u3000\u3000\"\"<\/p>\n

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\n\t\u3000\u3000\"\u53cc\u6781\u6027pwm\u539f\u7406\u56fe\u5206\u6790<\/p>\n

\n\t\u3000\u3000\u5bf9\u8f93\u51fa\u7684\u4ea4\u6d41\u7535\u538b\u548c\u4ea4\u6d41\u7535\u6d41\u8fdb\u884cFFT\u5206\u6790\uff0c\u53ef\u5f97\u9891\u8c31\u56fe\u5982\u56fe2.2\uff082\uff09\uff08a\uff09\u548c2.2\uff082\uff09\uff08b\uff09\u6240\u793a\u3002\u57fa\u6ce2\u5e45\u503c\u589e\u52a0\u5230299V\u3002\u5176\u8c10\u6ce2\u7279\u6027\u4e5f\u6709\u8f83\u5927\u53d8\u5316\uff0c15\u6b21\u8c10\u6ce2\u660e\u663e\u964d\u4f4e\uff0c\u53ea\u6709\u57fa\u6ce2\u768459.81%\uff0c\u4f4613\u6b21\u8c10\u6ce2\u6709\u6240\u589e\u5927\uff0cTHD\u4e3a100.28%\u4ea4\u6d41\u7535\u6d41\u7684THD\u4e5f\u964d\u4f4e\u52309.91%\u3002 <\/p>\n

\n\t\u3000\u3000\uff083\uff09\u5f53m=1\uff0cfc=1500HZ\u65f6\uff0c \u8f93\u51fa\u4ea4\u6d41\u7535\u538b\u3001\u4ea4\u6d41\u7535\u6d41\u548c\u76f4\u6d41\u7535\u6d41\u4eff\u771f\u6ce2\u5f62\u56fe\u5982\u56fe2.2\uff083\uff09\u6240\u793a\u3002<\/p>\n

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