{"id":9251,"date":"2022-06-13T15:14:03","date_gmt":"2022-06-13T07:14:03","guid":{"rendered":"http:\/\/www.szryc.com\/?p=9251"},"modified":"2022-06-13T15:14:03","modified_gmt":"2022-06-13T07:14:03","slug":"%e5%82%85%e9%87%8c%e5%8f%b6%e5%8f%98%e6%8d%a2%e4%b8%8epwm%e8%b0%83%e5%88%b6%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=9251","title":{"rendered":"\u5085\u91cc\u53f6\u53d8\u6362\u4e0ePWM\u8c03\u5236\u5e94\u7528"},"content":{"rendered":"

\u5085\u91cc\u53f6\u53d8\u6362\u7684\u63d0\u51fa\u8ba9\u4eba\u4eec\u770b\u95ee\u9898\u7684\u89d2\u5ea6\u4ece\u65f6\u57df\u53d8\u6210\u4e86\u9891\u57df\uff0c\u591a\u4e86\u4e00\u4e2a\u7ef4\u5ea6\u3002\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362\u7b97\u6cd5\u7684\u63d0\u51fa\u666e\u53ca\u4e86\u5085\u91cc\u53f6\u53d8\u6362\u5728\u5de5\u7a0b\u9886\u57df\u7684\u5e94\u7528\uff0c\u5728\u79d1\u5b66\u8ba1\u7b97\u548c\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u7b49\u9886\u57df\uff0c\u79bb\u6563\u5085\u91cc\u53f6\u53d8\u6362\uff08DFT\uff09\u81f3\u4eca\u4f9d\u7136\u662f\u975e\u5e38\u6709\u6548\u7684\u5de5\u5177<\/u>\u4e4b\u4e00\u3002<\/p>\n

1. \u5085\u91cc\u53f6\u53d8\u6362<\/p>\n

\u5085\u91cc\u53f6\u53d8\u6362\u7684\u7269\u7406\u610f\u4e49\u662f\u628a\u65f6\u57df\u590d\u6742\u7684\u4fe1\u53f7\u5728\u9891\u8c31\u4e2d\u5206\u89e3\u51fa\u6765\uff0c\u65f6\u57df\u65e0\u6cd5\u786e\u5b9a\u4fe1\u53f7\u6709\u54ea\u4e9b\u9891\u7387\uff0c\u4f46\u662f\u5728\u9891\u57df\u4e0a\u770b\u5c31\u975e\u5e38\u6e05\u6670\u3002<\/p>\n

\u6bd4\u5982\u4e0b\u56fe\uff0c\u4fe1\u53f7y\u542b\u67090.9v@25Hz\u30010.4V@250Hz\u30010.6V@412Hz\u7684\u4e09\u79cd\u9891\u7387\u6210\u5206\uff0c\u5728\u65f6\u57df\u5355\u5355\u770b\u6ce2\u5f62\u7684\u8bdd\u5c31\u6bd4\u8f83\u96be\u533a\u5206\u51fa\u8fd9\u4e09\u79cd\u9891\u7387\u3002<\/p>\n

y = 0.9*sin\uff082*pi<\/u>*25*t\uff09 + 0.4*sin\uff082*pi*250*t\uff09 + 0.6*sin\uff082*pi*412*t\uff09;<\/p>\n

\"poYBAGKgWXOAQUDOAADN26U2e5Y983\"<\/p>\n

\u4f46\u662f\u7ecf\u8fc7\u5085\u91cc\u53f6\u53d8\u6362\u4ee5\u540e\uff0c\u5728\u9891\u57df\u770b\uff0c\u5c31\u975e\u5e38\u6e05\u6670\u4e86\u3002\u4e09\u79cd\u4fe1\u53f7\u9891\u7387\u4ee5\u53ca\u5e45\u503c\u8dc3\u7136\u7eb8\u4e0a\u3002<\/p>\n

\"pYYBAGKgWYWAIB8NAABnqLjsz9k085\"<\/p>\n

\u53ef\u4ee5\u5f97\u5230\u539f\u59cbmatlab<\/u>\u4ee3\u7801<\/p>\n

\u5085\u91cc\u53f6\u53d8\u6362\u5728\u6211\u4eec\u5de5\u7a0b\u5e94\u7528\u4e2d\u7684\u5730\u4f4d\u6c38\u5782\u4e0d\u673d\uff0c\u672c\u6587\u4e3e\u4f8b\u4ecb\u7ecd\u4e0bFFT<\/u>\u4e0ePWM\u7684\u5e94\u7528\u3002<\/p>\n

2. PWM\u4fe1\u53f7<\/p>\n

PWM\u662f\u8109\u51b2\u5bbd\u5ea6\u8c03\u5236\u7684\u610f\u601d\uff0c\u5360\u7a7a\u6bd4D\u662f\u9ad8\u7535\u5e73\u6301\u7eed\u7684\u65f6\u95f4\/\u5468\u671f\uff0c\u5360\u7a7a\u6bd4\u8d8a\u5c0f\uff0cPWM\u4fe1\u53f7\u8d8a\u7a84\uff1b\u53cd\u4e4b\uff0cPWM\u4fe1\u53f7\u5c31\u8d8a\u5bbd\u3002<\/p>\n

\"poYBAGKgWZqAYwBgAAFWYDdEhpA432\"<\/p>\n

\u5bf9\u4e8e\u4e0a\u9762\u5e45\u5ea6\u4e3a1V\uff0c1Khz\uff0c\u5360\u7a7a\u6bd4\u4e3a10%\u7684PWM\u6ce2\u5f62\uff0c\u8fdb\u884c\u5085\u91cc\u53f6\u53d8\u6362\u540e\uff0c\u53ef\u4ee5\u770b\u5230\u5728\u76f4\u6d41\u5904\u7684\u7535\u538b\u5e45\u503c\u4e3a0.0996V\uff0c\u57281Khz\u5904\u7684\u5e45\u503c\u4e3a0.196V\uff0c\u57282Khz\u3002\u3002\u3002\u3002\u3002\u4ee5\u6b64\u7c7b\u63a8\uff0c\u5165\u4e0b\u56fe\u6240\u793a\uff0cPWM\u4fe1\u53f7\u662f\u7531\u65e0\u6570\u4e2a\u4e0d\u540c\u9891\u7387\u7684\u6b63\u5f26\u4fe1\u53f7\u7ec4\u6210\u7684\uff0c\u8fd9\u662fFFT\u7ed9\u6211\u4eec\u7684\u7ed3\u8bba\u3002<\/p>\n

\"pYYBAGKgWbGAa_tAAAG3UIZMOH0156\"<\/p>\n

\u6211\u4eec\u589e\u52a0PWM\u7684\u5360\u7a7a\u6bd4\u523050%\uff0c\u4e5f\u5c31\u662f\u53d8\u6210\u65b9\u6ce2\u4fe1\u53f7\uff0c\u5085\u91cc\u53f6\u53d8\u6362\u5982\u4e0b\uff0c\u76f4\u6d41\u5e45\u503c\u589e\u52a0\u52300.5V\uff0c1Khz\u5e45\u503c\u589e\u52a0\u52300.637V\uff0c\u53ef\u89c1\u76f8\u6bd4\u4e8e10%\u5360\u7a7a\u6bd4\uff0c\u4f4e\u9891\u4fe1\u53f7\u5e45\u503c\u589e\u52a0\u3002<\/p>\n

\"poYBAGKgWc6AQZjRAAH11jU-fVU768\"<\/p>\n

\u6211\u4eec\u7ee7\u7eed\u589e\u52a0\u5360\u7a7a\u6bd4\u523090%\uff0c\u4f4e\u9891\u76f4\u6d41\u6210\u5206\u7ee7\u7eed\u589e\u52a0\uff0c\u63a5\u8fd10.9V\u3002<\/p>\n

\"poYBAGKgWfaAW_yyAAIEv3rfPhI832\"<\/p>\n

\u8ba9\u6211\u4eec\u8fde\u7eed\u7684\u770b\u4e0b\u968f\u7740PWM\u5360\u7a7a\u6bd4\u7684\u589e\u52a0\uff0c\u76f4\u6d41\u6210\u5206\u4e5f\u9010\u6e10\u589e\u52a0\u7684\u8fc7\u7a0b\uff0c\u7ea2\u7ebf\u6ce2\u5f62\u662f\u8f93\u5165\u7684PWM\u4fe1\u53f7\uff0c\u84dd\u8272\u6ce2\u5f62\u662f\u6ee4\u6ce2\u540e\u7684\u4fe1\u53f7\uff0c\u4ee5\u4f4e\u9891\u4e3a\u4e3b\u3002<\/p>\n

\"pYYBAGKgWgaAHQGPAAJkhPJFVxs057\"<\/p>\n

\u753b\u51faDC\u76f4\u6d41\u5e45\u503c\u968f\u5360\u7a7a\u6bd4\u7684\u53d8\u5316\u5982\u4e0b\uff0c\u53ef\u4ee5\u660e\u663e\u770b\u5230\u5360\u7a7a\u6bd4\u8d8a\u9ad8\uff0c\u76f4\u6d41\u5e45\u503c\u5c31\u8d8a\u591a\u3002<\/p>\n

\"poYBAGKgWhqAdPBqAACXjBhWsc0475\"<\/p>\n

PWM\u4e0d\u540c\u5360\u7a7a\u6bd4\uff0c\u5728\u9891\u7387\u4e0a\u4f1a\u6709\u4e0d\u540c\u7684\u9891\u7387\u4fe1\u606f\uff0c\u6211\u4eec\u53ef\u4ee5\u628a\u6211\u4eec\u7684\u4fe1\u606f\u8c03\u5236\u5230PWM\u4fe1\u53f7\u7684\u8109\u5bbd\u4e0a\uff0c\u8fd9\u5c31\u662fPWM\u8c03\u5236\u7684\u57fa\u672c\u539f\u7406\u3002<\/p>\n

3. FFT\u4e0ePWM\u7684\u5e94\u7528<\/p>\n

\u90a3\u4e48\u8fd9\u6709\u4ec0\u4e48\u7528\u5462\uff1f\u5229\u7528FFT\u7684\u539f\u7406\uff0c\u5728PWM\u4fe1\u53f7\u540e\u9762\u52a0\u4e00\u4e2a\u4f4e\u901a\u6ee4\u6ce2\u5668<\/u>\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u8c03\u5236PWM\u4fe1\u53f7\u7684\u5360\u7a7a\u6bd4\uff0c\u6765\u4ea7\u751f\u6211\u4eec\u60f3\u8981\u7684\u4e0d\u540c\u5e45\u503c\u7684\u76f4\u6d41\u4fe1\u53f7\u3002<\/p>\n

\u6bd4\u5982\u4f7f\u752810\u03a9\u7535\u963b<\/u>\u3001470uF\u7535\u5bb9<\/u>\u6784\u6210\u622a\u6b62\u9891\u7387\u4e3a33.88Hz\u7684\u4f4e\u901a\u6ee4\u6ce2\u5668\u3002<\/p>\n

\"poYBAGKgWiiAG-XnAAFIzKCNkR0050\"<\/p>\n

\u5728\u5360\u7a7a\u6bd4\u4e3a10%\u65f6\uff0c\u5176\u8f93\u51fa\u662f100mV\u7684\u63a5\u8fd1\u76f4\u6d41\u7684\u4fe1\u53f7\uff0c\u4e0e\u524d\u9762\u5206\u6790\u7ed3\u679c\u4e00\u81f4\u3002<\/p>\n

\"poYBAGKgWjWAf5Y6AAFlt7OJVpo058\"<\/p>\n

\u5360\u7a7a\u6bd4\u589e\u52a0\u523050%\u65f6\uff0c\u5176\u8f93\u51fa\u662f500mV\u7684\u76f4\u6d41\uff0c\u4e0e\u524d\u9762\u5206\u6790\u7ed3\u679c\u4e00\u81f4\u3002<\/p>\n

\"poYBAGKgWkKAHJUqAAGJJcpUSxE503\"<\/p>\n

\u5360\u7a7a\u6bd4\u589e\u52a0\u523090%\u65f6\uff0c\u5176\u8f93\u51fa\u662f900mV\u7684\u76f4\u6d41\uff0c\u4e0e\u524d\u9762\u5206\u6790\u7ed3\u679c\u4e00\u81f4\u3002<\/p>\n

\"pYYBAGKgWlCAaFVwAAGVJx_NXLc979\"<\/p>\n

\u6211\u4eec\u5c31\u662f\u8fd9\u6837\uff0c\u901a\u8fc7\u8c03\u5236PWM\u7684\u5360\u7a7a\u6bd4\uff0c\u8fdb\u800c\u5f97\u5230\u6211\u4eec\u60f3\u8981\u7684\u4e0d\u540c\u5e45\u503c\u7684\u76f4\u6d41\u4fe1\u53f7\uff0c\u672c\u6587\u53ea\u4ee5\u4e00\u9636\u4f4e\u901a\u4e3a\u4f8b\uff0c\u5982\u679c\u9636\u6570\u9ad8\u4e00\u4e9b\uff0c\u6ee4\u6ce2\u6548\u679c\u4f1a\u66f4\u597d\u3002\u8fd9\u4e2a\u539f\u7406\u5c31\u662fFFT\uff0cPWM\u4fe1\u53f7\u5177\u6709\u4e0d\u540c\u9891\u7387\u6210\u5206\uff0c\u5176\u76f4\u6d41\u5e45\u503c\u4e5f\u4e0d\u540c\uff0c\u901a\u8fc7\u4f4e\u901a\u6ee4\u6ce2\u5668\u540e\uff0c\u6291\u5236\u6389\u5176\u4e2d\u7684\u9ad8\u9891\u6210\u5206\uff0c\u5c31\u5269\u4e0b\u4e0d\u540c\u5e45\u503c\u7684\u76f4\u6d41\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5085\u91cc\u53f6\u53d8\u6362\u7684\u63d0\u51fa\u8ba9\u4eba\u4eec\u770b\u95ee\u9898\u7684\u89d2\u5ea6\u4ece\u65f6\u57df\u53d8\u6210\u4e86\u9891\u57df\uff0c\u591a\u4e86\u4e00\u4e2a\u7ef4\u5ea6\u3002\u5feb\u901f\u5085\u91cc\u53f6\u53d8\u6362\u7b97\u6cd5\u7684\u63d0\u51fa\u666e\u53ca\u4e86\u5085\u91cc\u53f6\u53d8\u6362\u5728\u5de5 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"_links":{"self":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/9251"}],"collection":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9251"}],"version-history":[{"count":1,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/9251\/revisions"}],"predecessor-version":[{"id":9265,"href":"http:\/\/www.szryc.com\/index.php?rest_route=\/wp\/v2\/posts\/9251\/revisions\/9265"}],"wp:attachment":[{"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9251"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.szryc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}