{"id":75970,"date":"2026-02-13T17:05:36","date_gmt":"2026-02-13T09:05:36","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/75970.html"},"modified":"2026-02-13T17:05:36","modified_gmt":"2026-02-13T09:05:36","slug":"%e5%b5%8c%e5%85%a5%e5%bc%8f%e7%b3%bb%e7%bb%9f%e4%b8%ad%e7%9a%84%e4%bf%a1%e5%8f%b7%e9%93%be%e8%ae%be%e8%ae%a1%ef%bc%9apwm%e5%a6%82%e4%bd%95%e9%a9%b1%e5%8a%a8420ma%e5%b7%a5%e4%b8%9a%e6%a0%87%e5%87%86","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/75970.html","title":{"rendered":"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3"},"content":{"rendered":"<h2>\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1&#xff1a;PWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3<\/h2>\n<p>\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u4e0e\u8fc7\u7a0b\u63a7\u5236\u9886\u57df&#xff0c;4~20mA\u7535\u6d41\u73af\u4f5c\u4e3a\u4e00\u79cd\u7ecf\u5178\u4e14\u53ef\u9760\u7684\u4fe1\u53f7\u4f20\u8f93\u6807\u51c6&#xff0c;\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4f20\u611f\u5668\u3001\u6267\u884c\u5668\u548c\u63a7\u5236\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u3002\u5176\u4f18\u52bf\u5728\u4e8e\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u3001\u4f20\u8f93\u8ddd\u79bb\u8fdc&#xff0c;\u4e14\u80fd\u591f\u901a\u8fc7\u7535\u6d41\u503c\u540c\u65f6\u4f20\u9012\u4fe1\u53f7\u548c\u4f9b\u7535\u3002\u7136\u800c&#xff0c;\u5982\u4f55\u5c06\u5fae\u63a7\u5236\u5668\u751f\u6210\u7684PWM\u4fe1\u53f7\u9ad8\u6548\u3001\u7cbe\u786e\u5730\u8f6c\u6362\u4e3a\u7a33\u5b9a\u76844~20mA\u7535\u6d41\u8f93\u51fa&#xff0c;\u662f\u8bb8\u591a\u786c\u4ef6\u5de5\u7a0b\u5e08\u548c\u7cfb\u7edf\u67b6\u6784\u5e08\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u5fc5\u987b\u9762\u5bf9\u7684\u6838\u5fc3\u95ee\u9898\u3002\u672c\u6587\u5c06\u4ece\u7cfb\u7edf\u7ea7\u4fe1\u53f7\u94fe\u8bbe\u8ba1\u7684\u89d2\u5ea6&#xff0c;\u6df1\u5165\u5206\u6790PWM\u5230\u7535\u6d41\u8f93\u51fa\u7684\u5b8c\u6574\u8f6c\u6362\u94fe\u8def&#xff0c;\u63a2\u8ba8\u5173\u952e\u5668\u4ef6\u7684\u9009\u578b\u4e0e\u914d\u7f6e&#xff0c;\u5e76\u5206\u4eab\u5b9e\u9645\u5de5\u4e1a\u5e94\u7528\u4e2d\u7684\u8bbe\u8ba1\u6743\u8861\u4e0e\u4f18\u5316\u7b56\u7565\u3002<\/p>\n<h3>1. \u7cfb\u7edf\u67b6\u6784\u4e0e\u4fe1\u53f7\u94fe\u5206\u6790<\/h3>\n<p>\u5de5\u4e1a\u73af\u5883\u4e2d\u7684\u4fe1\u53f7\u4f20\u8f93\u5f80\u5f80\u9762\u4e34\u7535\u78c1\u5e72\u6270\u3001\u957f\u8ddd\u79bb\u4f20\u8f93\u548c\u6076\u52a3\u5de5\u51b5\u7b49\u6311\u6218\u30024~20mA\u7535\u6d41\u73af\u4e4b\u6240\u4ee5\u6210\u4e3a\u5de5\u4e1a\u6807\u51c6&#xff0c;\u662f\u56e0\u4e3a\u5176\u91c7\u7528\u7535\u6d41\u4fe1\u53f7\u800c\u975e\u7535\u538b\u4fe1\u53f7\u8fdb\u884c\u4f20\u8f93&#xff0c;\u6709\u6548\u964d\u4f4e\u4e86\u7ebf\u8def\u7535\u963b\u548c\u7535\u78c1\u5e72\u6270\u5bf9\u4fe1\u53f7\u8d28\u91cf\u7684\u5f71\u54cd\u3002\u540c\u65f6&#xff0c;4mA\u7684\u201c\u6d3b\u96f6\u201d\u8bbe\u8ba1\u65e2\u80fd\u591f\u533a\u5206\u4fe1\u53f7\u65ad\u7ebf\u6545\u969c&#xff08;0mA&#xff09;&#xff0c;\u53c8\u53ef\u4ee5\u4e3a\u73b0\u573a\u8bbe\u5907\u63d0\u4f9b\u6700\u5c0f\u5de5\u4f5c\u7535\u6d41\u3002<\/p>\n<p>\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d&#xff0c;\u5fae\u63a7\u5236\u5668&#xff08;\u5982STM32\u7cfb\u5217&#xff09;\u901a\u5e38\u901a\u8fc7PWM&#xff08;\u8109\u51b2\u5bbd\u5ea6\u8c03\u5236&#xff09;\u4fe1\u53f7\u6765\u6a21\u62df\u6a21\u62df\u91cf\u8f93\u51fa\u3002PWM\u4fe1\u53f7\u662f\u4e00\u79cd\u6570\u5b57\u4fe1\u53f7&#xff0c;\u901a\u8fc7\u8c03\u6574\u5360\u7a7a\u6bd4\u6765\u7b49\u6548\u6a21\u62df\u7535\u538b\u503c\u3002\u7136\u800c&#xff0c;\u76f4\u63a5\u5c06PWM\u4fe1\u53f7\u8f6c\u6362\u4e3a4~20mA\u7535\u6d41\u8f93\u51fa\u9700\u8981\u7ecf\u8fc7\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u4fe1\u53f7\u94fe&#xff1a;<\/p>\n<p>\u4f20\u611f\u5668\u4fe1\u53f7 \u2192 \u5fae\u63a7\u5236\u5668(ADC) \u2192 \u6570\u636e\u5904\u7406 \u2192 PWM\u751f\u6210 \u2192 \u7535\u6d41\u8f6c\u6362 \u2192 4~20mA\u8f93\u51fa<\/p>\n<p>\u8fd9\u4e2a\u4fe1\u53f7\u94fe\u4e2d&#xff0c;PWM\u5230\u7535\u6d41\u7684\u8f6c\u6362\u73af\u8282\u5c24\u4e3a\u5173\u952e&#xff0c;\u5b83\u9700\u8981\u89e3\u51b3\u4ee5\u4e0b\u6838\u5fc3\u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>PWM\u4fe1\u53f7\u7684\u5e73\u6ed1\u6ee4\u6ce2\u548c\u7535\u5e73\u8f6c\u6362<\/li>\n<li>\u7535\u538b\u5230\u7535\u6d41\u7684\u7ebf\u6027\u8f6c\u6362<\/li>\n<li>\u8f93\u51fa\u7535\u6d41\u7684\u7cbe\u786e\u63a7\u5236\u548c\u7a33\u5b9a\u6027\u4fdd\u969c<\/li>\n<li>\u5de5\u4e1a\u73af\u5883\u4e2d\u7684\u6297\u5e72\u6270\u8bbe\u8ba1<\/li>\n<\/ul>\n<h3>2. \u5173\u952e\u5668\u4ef6\u9009\u578b\u4e0e\u7279\u6027\u5206\u6790<\/h3>\n<h4>2.1 \u5fae\u63a7\u5236\u5668\u7684PWM\u6a21\u5757\u8003\u91cf<\/h4>\n<p>STM32\u7cfb\u5217\u5fae\u63a7\u5236\u5668\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u9ad8\u7ea7\u5b9a\u65f6\u5668&#xff0c;\u80fd\u591f\u751f\u6210\u9ad8\u5206\u8fa8\u7387\u3001\u9ad8\u7cbe\u5ea6\u7684PWM\u4fe1\u53f7\u3002\u4e0d\u540c\u7cfb\u5217\u7684STM32\u5728PWM\u6027\u80fd\u4e0a\u5b58\u5728\u663e\u8457\u5dee\u5f02&#xff1a;<\/p>\n<table>\n<tr>\u578b\u53f7\u7cfb\u5217\u5b9a\u65f6\u5668\u5206\u8fa8\u7387\u6700\u5927\u9891\u7387\u4e92\u8865\u8f93\u51fa\u6b7b\u533a\u63d2\u5165\u9002\u7528\u573a\u666f<\/tr>\n<tbody>\n<tr>\n<td>STM32F1<\/td>\n<td>16\u4f4d<\/td>\n<td>72MHz<\/td>\n<td>\u6709\u9650\u652f\u6301<\/td>\n<td>\u57fa\u7840\u652f\u6301<\/td>\n<td>\u6210\u672c\u654f\u611f\u578b\u5e94\u7528<\/td>\n<\/tr>\n<tr>\n<td>STM32F4<\/td>\n<td>32\u4f4d<\/td>\n<td>168MHz<\/td>\n<td>\u5168\u9762\u652f\u6301<\/td>\n<td>\u9ad8\u7ea7\u652f\u6301<\/td>\n<td>\u9ad8\u6027\u80fd\u5de5\u4e1a\u63a7\u5236<\/td>\n<\/tr>\n<tr>\n<td>STM32G0<\/td>\n<td>16\u4f4d<\/td>\n<td>64MHz<\/td>\n<td>\u652f\u6301<\/td>\n<td>\u652f\u6301<\/td>\n<td>\u4f4e\u529f\u8017\u5e94\u7528<\/td>\n<\/tr>\n<tr>\n<td>STM32H7<\/td>\n<td>32\u4f4d<\/td>\n<td>480MHz<\/td>\n<td>\u5168\u9762\u652f\u6301<\/td>\n<td>\u9ad8\u7ea7\u652f\u6301<\/td>\n<td>\u6781\u9ad8\u6027\u80fd\u9700\u6c42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5bf9\u4e8e4~20mA\u8f93\u51fa\u5e94\u7528&#xff0c;PWM\u7684\u5206\u8fa8\u7387\u76f4\u63a5\u51b3\u5b9a\u4e86\u6700\u7ec8\u7535\u6d41\u8f93\u51fa\u7684\u7cbe\u5ea6\u3002\u4ee516\u4f4d\u5206\u8fa8\u7387\u4e3a\u4f8b&#xff0c;\u7406\u8bba\u4e0a\u53ef\u4ee5\u5b9e\u73b065536\u4e2a\u79bb\u6563\u7535\u5e73&#xff0c;\u8fdc\u9ad8\u4e8e\u901a\u5e38\u5de5\u4e1a\u5e94\u7528\u6240\u9700\u7684\u7cbe\u5ea6\u8981\u6c42\u3002\u4f46\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d&#xff0c;\u8fd8\u9700\u8981\u8003\u8651PWM\u9891\u7387\u7684\u9009\u62e9\u2014\u2014\u8fc7\u9ad8\u7684\u9891\u7387\u4f1a\u589e\u52a0\u8f6c\u6362\u7535\u8def\u7684\u590d\u6742\u5ea6&#xff0c;\u800c\u8fc7\u4f4e\u7684\u9891\u7387\u5219\u53ef\u80fd\u5bfc\u81f4\u8f93\u51fa\u7eb9\u6ce2\u8fc7\u5927\u3002<\/p>\n<p>\u8bbe\u8ba1\u63d0\u793a&#xff1a;\u5728\u9009\u62e9PWM\u9891\u7387\u65f6&#xff0c;\u9700\u8981\u6743\u8861\u8f6c\u6362\u7535\u8def\u7684\u590d\u6742\u5ea6\u4e0e\u8f93\u51fa\u7eb9\u6ce2\u8981\u6c42\u3002\u901a\u5e38\u5efa\u8bae\u9009\u62e91-10kHz\u8303\u56f4\u5185\u7684PWM\u9891\u7387&#xff0c;\u8fd9\u4e2a\u8303\u56f4\u65e2\u80fd\u4fdd\u8bc1\u826f\u597d\u7684\u6ee4\u6ce2\u6548\u679c&#xff0c;\u53c8\u4e0d\u4f1a\u5bf9\u8f6c\u6362\u7535\u8def\u63d0\u51fa\u8fc7\u9ad8\u8981\u6c42\u3002<\/p>\n<h4>2.2 CP7121\u7535\u6d41\u8f6c\u6362\u82af\u7247\u6df1\u5165\u89e3\u6790<\/h4>\n<p>CP7121\u662f\u4e00\u6b3e\u4e13\u4e3aPWM\u8f6c4~20mA\u8bbe\u8ba1\u7684\u96c6\u6210\u82af\u7247&#xff0c;\u5176\u5185\u90e8\u7ed3\u6784\u5305\u542b\u4e86\u7535\u538b\u57fa\u51c6\u3001\u8fd0\u7b97\u653e\u5927\u5668\u3001\u7535\u6d41\u653e\u5927\u5668\u548c\u4fdd\u62a4\u7535\u8def\u7b49\u591a\u4e2a\u529f\u80fd\u6a21\u5757\u3002\u8be5\u82af\u7247\u7684\u4e3b\u8981\u7279\u6027\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u9ad8\u7ebf\u6027\u5ea6&#xff1a;\u5178\u578b\u503c0.01%\u7684\u7ebf\u6027\u5ea6\u786e\u4fdd\u4e86\u8f93\u5165PWM\u5360\u7a7a\u6bd4\u4e0e\u8f93\u51fa\u7535\u6d41\u4e4b\u95f4\u7684\u7cbe\u786e\u5bf9\u5e94\u5173\u7cfb<\/li>\n<li>\u5185\u7f6e\u6ee4\u6ce2&#xff1a;\u82af\u7247\u5185\u90e8\u96c6\u6210\u4e86\u4f4e\u901a\u6ee4\u6ce2\u7f51\u7edc&#xff0c;\u51cf\u5c11\u4e86\u5916\u90e8\u5143\u4ef6\u6570\u91cf<\/li>\n<li>\u5bbd\u7535\u6e90\u8303\u56f4&#xff1a;\u652f\u630112-36V\u7684\u5bbd\u7535\u6e90\u8f93\u5165&#xff0c;\u9002\u5e94\u5de5\u4e1a\u73af\u5883\u4e2d\u7684\u7535\u538b\u6ce2\u52a8<\/li>\n<li>\u8fc7\u8f7d\u4fdd\u62a4&#xff1a;\u5185\u7f6e\u8fc7\u6d41\u548c\u8fc7\u70ed\u4fdd\u62a4\u529f\u80fd&#xff0c;\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u53ef\u9760\u6027<\/li>\n<\/ul>\n<p>CP7121\u7684\u5de5\u4f5c\u539f\u7406\u662f\u57fa\u4e8e\u4e00\u4e2a\u7cbe\u5bc6\u7684\u7535\u538b-\u7535\u6d41\u8f6c\u6362\u5668\u3002PWM\u4fe1\u53f7\u7ecf\u8fc7RC\u6ee4\u6ce2\u540e\u5f97\u5230\u7684\u6a21\u62df\u7535\u538b&#xff0c;\u88ab\u8f6c\u6362\u4e3a\u76f8\u5e94\u7684\u8f93\u51fa\u7535\u6d41\u3002\u82af\u7247\u5185\u90e8\u7684\u57fa\u51c6\u7535\u538b\u6e90\u786e\u4fdd\u4e86\u8f6c\u6362\u5173\u7cfb\u7684\u7a33\u5b9a\u6027&#xff0c;\u800c\u53cd\u9988\u673a\u5236\u5219\u4fdd\u8bc1\u4e86\u8f93\u51fa\u7535\u6d41\u4e0d\u53d7\u8d1f\u8f7d\u7535\u963b\u53d8\u5316\u7684\u5f71\u54cd\u3002<\/p>\n<h3>3. \u786c\u4ef6\u7535\u8def\u8bbe\u8ba1\u5b9e\u8df5<\/h3>\n<h4>3.1 \u5916\u56f4\u7535\u8def\u7b80\u5316\u8bbe\u8ba1<\/h4>\n<p>\u867d\u7136CP7121\u5927\u5e45\u7b80\u5316\u4e86PWM\u52304~20mA\u7684\u8f6c\u6362\u7535\u8def&#xff0c;\u4f46\u4ecd\u9700\u8981\u7cbe\u5fc3\u8bbe\u8ba1\u5916\u56f4\u7535\u8def\u4ee5\u786e\u4fdd\u6700\u4f73\u6027\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5178\u578b\u5e94\u7528\u7535\u8def\u7684\u5143\u4ef6\u9009\u578b\u5efa\u8bae&#xff1a;<\/p>\n<p>\/\/ PWM\u6ee4\u6ce2\u7535\u8def\u8ba1\u7b97\u793a\u4f8b<br \/>\n#define PWM_FREQUENCY 10000    \/\/ PWM\u9891\u738710kHz<br \/>\n#define CUTOFF_FREQUENCY 100   \/\/ \u622a\u6b62\u9891\u7387100Hz<\/p>\n<p>\/\/ \u8ba1\u7b97\u6ee4\u6ce2\u7535\u963b\u548c\u7535\u5bb9\u503c<br \/>\nfloat R_filter &#061; 10000;        \/\/ 10k\u03a9\u7535\u963b<br \/>\nfloat C_filter &#061; 1\/(2 * 3.1416 * R_filter * CUTOFF_FREQUENCY);<br \/>\nprintf(&#034;\u63a8\u8350\u6ee4\u6ce2\u7535\u5bb9\u503c: %.2f uF&#034;, C_filter * 1000000);<\/p>\n<p>\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d&#xff0c;\u6ee4\u6ce2\u7535\u8def\u7684\u8bbe\u8ba1\u9700\u8981\u7efc\u5408\u8003\u8651\u54cd\u5e94\u901f\u5ea6\u548c\u7eb9\u6ce2\u6291\u5236\u3002\u8f83\u4f4e\u7684\u622a\u6b62\u9891\u7387\u6709\u5229\u4e8e\u6291\u5236\u7eb9\u6ce2&#xff0c;\u4f46\u4f1a\u964d\u4f4e\u7cfb\u7edf\u7684\u54cd\u5e94\u901f\u5ea6\u3002\u5bf9\u4e8e\u5927\u591a\u6570\u5de5\u4e1a\u8fc7\u7a0b\u63a7\u5236\u5e94\u7528&#xff0c;100-500Hz\u7684\u622a\u6b62\u9891\u7387\u662f\u4e00\u4e2a\u5408\u7406\u7684\u6298\u4e2d\u9009\u62e9\u3002<\/p>\n<p>\u5173\u952e\u5916\u56f4\u5143\u4ef6\u9009\u578b\u6307\u5357&#xff1a;<\/p>\n<li>\u6ee4\u6ce2\u7535\u963b&#xff1a;\u9009\u62e9\u6e29\u5ea6\u7cfb\u6570\u4f4e&#xff08;\u00b150ppm\/\u00b0C\u4ee5\u4e0b&#xff09;\u3001\u7cbe\u5ea6\u9ad8&#xff08;\u00b11%&#xff09;\u7684\u91d1\u5c5e\u819c\u7535\u963b<\/li>\n<li>\u6ee4\u6ce2\u7535\u5bb9&#xff1a;\u4f7f\u7528X7R\u6216X5R\u4ecb\u8d28\u7684\u9676\u74f7\u7535\u5bb9&#xff0c;\u6ce8\u610f\u76f4\u6d41\u504f\u538b\u7279\u6027\u5bf9\u5b9e\u9645\u5bb9\u503c\u7684\u5f71\u54cd<\/li>\n<li>\u65c1\u8def\u7535\u5bb9&#xff1a;\u5728CP7121\u7684\u7535\u6e90\u5f15\u811a\u9644\u8fd1\u653e\u7f6e100nF\u548c10\u03bcF\u7684\u7535\u5bb9&#xff0c;\u6291\u5236\u7535\u6e90\u566a\u58f0<\/li>\n<li>\u4fdd\u62a4\u5143\u4ef6&#xff1a;\u5728\u8f93\u51fa\u7aef\u6dfb\u52a0TVS\u7ba1\u548c\u81ea\u6062\u590d\u4fdd\u9669\u4e1d&#xff0c;\u9632\u6b62\u8fc7\u538b\u548c\u8fc7\u6d41\u635f\u574f<\/li>\n<h4>3.2 PCB\u5e03\u5c40\u4e0e\u6297\u5e72\u6270\u63aa\u65bd<\/h4>\n<p>\u5de5\u4e1a\u73af\u5883\u4e2d\u7684\u7535\u78c1\u5e72\u6270\u53ef\u80fd\u4e25\u91cd\u5f71\u54cd4~20mA\u4fe1\u53f7\u7684\u51c6\u786e\u6027\u3002\u4ee5\u4e0bPCB\u5e03\u5c40\u5b9e\u8df5\u80fd\u591f\u663e\u8457\u63d0\u9ad8\u7cfb\u7edf\u7684\u6297\u5e72\u6270\u80fd\u529b&#xff1a;<\/p>\n<ul>\n<li>\u5730\u5e73\u9762\u8bbe\u8ba1&#xff1a;\u91c7\u7528\u5b8c\u6574\u5730\u5e73\u9762&#xff0c;\u4e3a\u9ad8\u9891\u566a\u58f0\u63d0\u4f9b\u4f4e\u963b\u6297\u56de\u6d41\u8def\u5f84<\/li>\n<li>\u4fe1\u53f7\u5206\u79bb&#xff1a;\u5c06\u6570\u5b57\u90e8\u5206&#xff08;MCU&#xff09;\u4e0e\u6a21\u62df\u90e8\u5206&#xff08;CP7121&#xff09;\u7269\u7406\u5206\u79bb&#xff0c;\u907f\u514d\u6570\u5b57\u566a\u58f0\u8026\u5408\u5230\u6a21\u62df\u7535\u8def<\/li>\n<li>\u7535\u6e90\u53bb\u8026&#xff1a;\u5728\u6bcf\u4e2a\u7535\u6e90\u5f15\u811a\u9644\u8fd1\u653e\u7f6e\u53bb\u8026\u7535\u5bb9&#xff0c;\u5c3d\u53ef\u80fd\u9760\u8fd1\u5f15\u811a\u653e\u7f6e<\/li>\n<li>\u5c4f\u853d\u63aa\u65bd&#xff1a;\u5bf9\u654f\u611f\u6a21\u62df\u7535\u8def\u4f7f\u7528\u5c4f\u853d\u7f69\u6216\u5c4f\u853d\u5c42&#xff0c;\u9632\u6b62\u5916\u90e8\u5e72\u6270<\/li>\n<\/ul>\n<p>\u91cd\u8981\u6ce8\u610f\u4e8b\u9879&#xff1a;\u5728\u4e8c\u7ebf\u52364~20mA\u7cfb\u7edf\u4e2d&#xff0c;\u540c\u4e00\u4e2a\u73af\u8def\u65e2\u4f20\u8f93\u4fe1\u53f7\u53c8\u63d0\u4f9b\u7535\u6e90\u3002\u8fd9\u610f\u5473\u7740\u5fc5\u987b\u4ed4\u7ec6\u8003\u8651\u7535\u8def\u7684\u529f\u8017\u9884\u7b97&#xff0c;\u786e\u4fdd\u57284mA\u65f6\u4ecd\u6709\u8db3\u591f\u7684\u5de5\u4f5c\u7535\u6d41\u3002<\/p>\n<h3>4. \u8f6f\u4ef6\u5b9e\u73b0\u4e0e\u6821\u51c6\u7b56\u7565<\/h3>\n<h4>4.1 STM32 PWM\u914d\u7f6e\u4f18\u5316<\/h4>\n<p>STM32\u7684\u5b9a\u65f6\u5668\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684PWM\u751f\u6210\u529f\u80fd&#xff0c;\u901a\u8fc7\u5408\u7406\u914d\u7f6e\u53ef\u4ee5\u5b9e\u73b0\u6781\u9ad8\u7684\u7cbe\u5ea6\u548c\u7a33\u5b9a\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u9488\u5bf94~20mA\u5e94\u7528\u4f18\u5316\u7684PWM\u914d\u7f6e\u793a\u4f8b&#xff1a;<\/p>\n<p>\/\/ \u9ad8\u7ea7PWM\u914d\u7f6e\u793a\u4f8b<br \/>\nvoid PWM_Init_Advanced(void)<br \/>\n{<br \/>\n    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;<br \/>\n    TIM_OCInitTypeDef TIM_OCInitStructure;<\/p>\n<p>    \/\/ \u65f6\u949f\u914d\u7f6e<br \/>\n    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);<br \/>\n    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);<\/p>\n<p>    \/\/ GPIO\u914d\u7f6e<br \/>\n    GPIO_InitStructure.GPIO_Pin &#061; GPIO_Pin_0;<br \/>\n    GPIO_InitStructure.GPIO_Mode &#061; GPIO_Mode_AF_PP;<br \/>\n    GPIO_InitStructure.GPIO_Speed &#061; GPIO_Speed_50MHz;<br \/>\n    GPIO_Init(GPIOA, &amp;GPIO_InitStructure);<\/p>\n<p>    \/\/ \u65f6\u57fa\u914d\u7f6e<br \/>\n    TIM_TimeBaseStructure.TIM_Period &#061; 21999;        \/\/ \u81ea\u52a8\u91cd\u8f7d\u503c<br \/>\n    TIM_TimeBaseStructure.TIM_Prescaler &#061; 71;        \/\/ \u9884\u5206\u9891\u5668<br \/>\n    TIM_TimeBaseStructure.TIM_ClockDivision &#061; 0;<br \/>\n    TIM_TimeBaseStructure.TIM_CounterMode &#061; TIM_CounterMode_Up;<br \/>\n    TIM_TimeBaseInit(TIM2, &amp;TIM_TimeBaseStructure);<\/p>\n<p>    \/\/ PWM\u8f93\u51fa\u914d\u7f6e<br \/>\n    TIM_OCInitStructure.TIM_OCMode &#061; TIM_OCMode_PWM1;<br \/>\n    TIM_OCInitStructure.TIM_OutputState &#061; TIM_OutputState_Enable;<br \/>\n    TIM_OCInitStructure.TIM_Pulse &#061; 0;               \/\/ \u521d\u59cb\u5360\u7a7a\u6bd4<br \/>\n    TIM_OCInitStructure.TIM_OCPolarity &#061; TIM_OCPolarity_High;<br \/>\n    TIM_OC1Init(TIM2, &amp;TIM_OCInitStructure);<\/p>\n<p>    \/\/ \u9884\u88c5\u8f7d\u4f7f\u80fd<br \/>\n    TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);<br \/>\n    TIM_ARRPreloadConfig(TIM2, ENABLE);<\/p>\n<p>    \/\/ \u542f\u52a8\u5b9a\u65f6\u5668<br \/>\n    TIM_Cmd(TIM2, ENABLE);<br \/>\n}<\/p>\n<p>\u8fd9\u79cd\u914d\u7f6e\u65b9\u5f0f\u5229\u7528\u4e86STM32\u5b9a\u65f6\u5668\u7684\u9884\u88c5\u8f7d\u529f\u80fd&#xff0c;\u53ef\u4ee5\u5728\u4e0d\u5e72\u6270\u5f53\u524dPWM\u8f93\u51fa\u7684\u60c5\u51b5\u4e0b\u66f4\u65b0\u5360\u7a7a\u6bd4&#xff0c;\u786e\u4fdd\u4e86\u8f93\u51fa\u4fe1\u53f7\u7684\u8fde\u7eed\u6027\u3002<\/p>\n<h4>4.2 \u7cfb\u7edf\u6821\u51c6\u4e0e\u6e29\u5ea6\u8865\u507f<\/h4>\n<p>\u5373\u4f7f\u4f7f\u7528\u9ad8\u7cbe\u5ea6\u5143\u4ef6&#xff0c;\u5b9e\u9645\u7cfb\u7edf\u4e2d\u4ecd\u5b58\u5728\u8bef\u5dee\u6e90&#xff0c;\u9700\u8981\u901a\u8fc7\u6821\u51c6\u6765\u4fdd\u8bc1\u7cbe\u5ea6\u3002\u63a8\u8350\u91c7\u7528\u4e24\u70b9\u6821\u51c6\u6cd5&#xff1a;<\/p>\n<li>\u96f6\u70b9\u6821\u51c6&#xff08;4mA\u70b9&#xff09;&#xff1a;\u8bbe\u7f6ePWM\u8f93\u51fa\u5bf9\u5e944mA\u7684\u5360\u7a7a\u6bd4&#xff0c;\u6d4b\u91cf\u5b9e\u9645\u8f93\u51fa\u7535\u6d41\u5e76\u8ba1\u7b97\u8bef\u5dee<\/li>\n<li>\u6ee1\u91cf\u7a0b\u6821\u51c6&#xff08;20mA\u70b9&#xff09;&#xff1a;\u8bbe\u7f6ePWM\u8f93\u51fa\u5bf9\u5e9420mA\u7684\u5360\u7a7a\u6bd4&#xff0c;\u6d4b\u91cf\u5b9e\u9645\u8f93\u51fa\u7535\u6d41\u5e76\u8ba1\u7b97\u8bef\u5dee<\/li>\n<li>\u7ebf\u6027\u63d2\u503c&#xff1a;\u6839\u636e\u4e24\u70b9\u6821\u51c6\u7ed3\u679c\u8ba1\u7b97\u6bd4\u4f8b\u7cfb\u6570\u548c\u504f\u79fb\u91cf<\/li>\n<p>\u5bf9\u4e8e\u6e29\u5ea6\u53d8\u5316\u8f83\u5927\u7684\u5e94\u7528\u73af\u5883&#xff0c;\u8fd8\u9700\u8981\u5b9e\u65bd\u6e29\u5ea6\u8865\u507f\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u73b0&#xff1a;<\/p>\n<p>\/\/ \u6e29\u5ea6\u8865\u507f\u793a\u4f8b\u4ee3\u7801<br \/>\nfloat TemperatureCompensation(int raw_adc, float temperature)<br \/>\n{<br \/>\n    \/\/ \u57fa\u7840\u8f6c\u6362\u5173\u7cfb<br \/>\n    float base_current &#061; (raw_adc * 16.0f \/ 65535.0f) &#043; 4.0f;<\/p>\n<p>    \/\/ \u6e29\u5ea6\u8865\u507f\u7cfb\u6570&#xff08;\u9700\u6839\u636e\u5b9e\u9645\u6d4b\u91cf\u786e\u5b9a&#xff09;<br \/>\n    float temp_coeff &#061; 0.0005f; \/\/ 0.05%\/\u00b0C<\/p>\n<p>    \/\/ \u53c2\u8003\u6e29\u5ea6&#xff08;\u901a\u5e38\u4e3a25\u00b0C&#xff09;<br \/>\n    float ref_temp &#061; 25.0f;<\/p>\n<p>    \/\/ \u5e94\u7528\u6e29\u5ea6\u8865\u507f<br \/>\n    return base_current * (1 &#043; temp_coeff * (temperature &#8211; ref_temp));<br \/>\n}<\/p>\n<p>\u6821\u51c6\u6570\u636e\u5b58\u50a8\u5efa\u8bae&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528STM32\u7684Flash\u5b58\u50a8\u6821\u51c6\u7cfb\u6570&#xff0c;\u907f\u514d\u6bcf\u6b21\u4e0a\u7535\u91cd\u65b0\u6821\u51c6<\/li>\n<li>\u91c7\u7528CRC\u6821\u9a8c\u786e\u4fdd\u5b58\u50a8\u6570\u636e\u7684\u5b8c\u6574\u6027<\/li>\n<li>\u63d0\u4f9b\u5916\u90e8\u63a5\u53e3\u652f\u6301\u73b0\u573a\u6821\u51c6\u66f4\u65b0<\/li>\n<\/ul>\n<h3>5. \u5b9e\u9645\u5e94\u7528\u6848\u4f8b\u4e0e\u6027\u80fd\u4f18\u5316<\/h3>\n<h4>5.1 \u5de5\u4e1a\u4f20\u611f\u5668\u53d8\u9001\u5668\u8bbe\u8ba1<\/h4>\n<p>\u5728\u5de5\u4e1a\u4f20\u611f\u5668\u53d8\u9001\u5668\u8bbe\u8ba1\u4e2d&#xff0c;4~20mA\u8f93\u51fa\u6a21\u5757\u7684\u6027\u80fd\u76f4\u63a5\u5f71\u54cd\u6574\u4e2a\u6d4b\u91cf\u7cfb\u7edf\u7684\u7cbe\u5ea6\u3002\u4ee5\u538b\u529b\u53d8\u9001\u5668\u4e3a\u4f8b&#xff0c;\u5176\u5178\u578b\u4fe1\u53f7\u94fe\u5982\u4e0b&#xff1a;<\/p>\n<p>\u538b\u529b\u4f20\u611f\u5668 \u2192 \u4fe1\u53f7\u8c03\u7406 \u2192 STM32 ADC \u2192 \u6570\u636e\u5904\u7406 \u2192 PWM\u751f\u6210 \u2192 CP7121 \u2192 4~20mA\u8f93\u51fa<\/p>\n<p>\u5728\u8fd9\u4e2a\u5e94\u7528\u4e2d&#xff0c;\u6211\u4eec\u53d1\u73b0\u51e0\u4e2a\u5173\u952e\u8bbe\u8ba1\u8003\u8651&#xff1a;<\/p>\n<li>\n<p>\u529f\u8017\u4f18\u5316&#xff1a;\u5728\u7535\u6c60\u4f9b\u7535\u7684\u73b0\u573a\u4eea\u8868\u4e2d&#xff0c;\u9700\u8981\u7cbe\u5fc3\u4f18\u5316STM32\u548cCP7121\u7684\u529f\u8017\u3002\u53ef\u4ee5\u4f7f\u7528STM32\u7684\u4f4e\u529f\u8017\u6a21\u5f0f&#xff0c;\u4ec5\u5728\u9700\u8981\u66f4\u65b0\u8f93\u51fa\u65f6\u624d\u5f00\u542fPWM\u548c\u8f6c\u6362\u7535\u8def\u3002<\/p>\n<\/li>\n<li>\n<p>\u54cd\u5e94\u65f6\u95f4&#xff1a;\u8fc7\u7a0b\u63a7\u5236\u5e94\u7528\u901a\u5e38\u8981\u6c42\u5feb\u901f\u7684\u54cd\u5e94\u65f6\u95f4\u3002\u901a\u8fc7\u4f18\u5316\u6ee4\u6ce2\u7535\u8def\u53c2\u6570\u548c\u8f6f\u4ef6\u7b97\u6cd5&#xff0c;\u53ef\u4ee5\u5c06\u6574\u4e2a\u4fe1\u53f7\u94fe\u7684\u54cd\u5e94\u65f6\u95f4\u63a7\u5236\u5728100ms\u4ee5\u5185\u3002<\/p>\n<\/li>\n<li>\n<p>\u6545\u969c\u8bca\u65ad&#xff1a;\u5229\u75284~20mA\u6807\u51c6\u7684\u7279\u70b9&#xff0c;\u53ef\u4ee5\u5b9e\u73b0\u65ad\u7ebf\u68c0\u6d4b&#xff08;\u7535\u6d41&lt;3.6mA&#xff09;\u548c\u4f20\u611f\u5668\u6545\u969c\u6307\u793a&#xff08;\u7535\u6d41&gt;20.5mA&#xff09;\u3002<\/p>\n<\/li>\n<h4>5.2 PLC\u6a21\u62df\u91cf\u8f93\u51fa\u6a21\u5757<\/h4>\n<p>\u5728PLC\u6a21\u62df\u91cf\u8f93\u51fa\u6a21\u5757\u4e2d&#xff0c;\u901a\u5e38\u9700\u8981\u540c\u65f6\u63d0\u4f9b\u591a\u4e2a4~20mA\u8f93\u51fa\u901a\u9053\u3002\u8fd9\u79cd\u60c5\u51b5\u4e0b&#xff0c;\u8bbe\u8ba1\u91cd\u70b9\u8f6c\u5411\u901a\u9053\u95f4\u7684\u4e00\u81f4\u6027\u548c\u9694\u79bb&#xff1a;<\/p>\n<p>\u591a\u901a\u9053\u8bbe\u8ba1\u8003\u8651&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528\u72ec\u7acb\u7684CP7121\u82af\u7247\u4e3a\u6bcf\u4e2a\u901a\u9053\u63d0\u4f9b\u6700\u4f73\u9694\u79bb<\/li>\n<li>\u91c7\u7528\u540c\u6b65\u7684PWM\u751f\u6210\u786e\u4fdd\u591a\u4e2a\u901a\u9053\u540c\u65f6\u66f4\u65b0<\/li>\n<li>\u5171\u4eab\u6821\u51c6\u6570\u636e\u4f46\u4e3a\u6bcf\u4e2a\u901a\u9053\u5b58\u50a8\u72ec\u7acb\u7684\u6821\u6b63\u7cfb\u6570<\/li>\n<\/ul>\n<p>\u5b9e\u8df5\u5fc3\u5f97&#xff1a;\u5728\u591a\u901a\u9053\u8bbe\u8ba1\u4e2d&#xff0c;\u6211\u4eec\u53d1\u73b0\u901a\u9053\u95f4\u7684\u4e32\u6270\u4e3b\u8981\u6765\u81ea\u7535\u6e90\u548c\u5730\u7ebf\u3002\u91c7\u7528\u661f\u578b\u63a5\u5730\u7ed3\u6784\u548c\u72ec\u7acb\u7684\u7535\u6e90\u6ee4\u6ce2\u53ef\u4ee5\u663e\u8457\u6539\u5584\u901a\u9053\u9694\u79bb\u5ea6\u3002<\/p>\n<h4>5.3 \u4f4e\u529f\u8017\u6a21\u5f0f\u4e0b\u7684\u8f93\u51fa\u7a33\u5b9a\u6027<\/h4>\n<p>\u8bb8\u591a\u5de5\u4e1a\u73b0\u573a\u4eea\u8868\u9700\u8981\u652f\u6301\u4f4e\u529f\u8017\u6a21\u5f0f&#xff0c;\u5982\u4f55\u5728\u964d\u4f4e\u529f\u8017\u7684\u540c\u65f6\u4fdd\u6301\u8f93\u51fa\u7a33\u5b9a\u6027\u662f\u4e00\u4e2a\u6311\u6218\u3002\u901a\u8fc7\u4ee5\u4e0b\u63aa\u65bd\u53ef\u4ee5\u5b9e\u73b0\u826f\u597d\u7684\u5e73\u8861&#xff1a;<\/p>\n<li>\u95f4\u6b47\u5de5\u4f5c\u6a21\u5f0f&#xff1a;\u4ec5\u5728\u9700\u8981\u66f4\u65b0\u8f93\u51fa\u65f6\u624d\u5f00\u542fCP7121\u7684\u7535\u6e90&#xff0c;\u5229\u7528\u8f93\u51fa\u7535\u5bb9\u4fdd\u6301\u671f\u95f4\u7684\u7535\u6d41\u7a33\u5b9a<\/li>\n<li>PWM\u9891\u7387\u4f18\u5316&#xff1a;\u5728\u4f4e\u529f\u8017\u6a21\u5f0f\u4e0b\u964d\u4f4ePWM\u9891\u7387&#xff0c;\u51cf\u5c11\u5f00\u5173\u635f\u8017<\/li>\n<li>\u667a\u80fd\u5524\u9192&#xff1a;\u8bbe\u7f6e\u8f93\u51fa\u53d8\u5316\u9608\u503c&#xff0c;\u53ea\u6709\u8d85\u8fc7\u9608\u503c\u65f6\u624d\u66f4\u65b0\u8f93\u51fa&#xff0c;\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u64cd\u4f5c<\/li>\n<p>\u6d4b\u8bd5\u6570\u636e\u663e\u793a&#xff0c;\u901a\u8fc7\u5408\u7406\u7684\u4f4e\u529f\u8017\u8bbe\u8ba1&#xff0c;\u6574\u4e2a\u4fe1\u53f7\u94fe\u7684\u9759\u6001\u529f\u8017\u53ef\u4ee5\u4ece\u5e38\u89c4\u76845mA\u964d\u4f4e\u52301mA\u4ee5\u4e0b&#xff0c;\u540c\u65f6\u4fdd\u6301\u8f93\u51fa\u7535\u6d41\u7684\u7a33\u5b9a\u6027\u5728\u00b10.1%\u4ee5\u5185\u3002<\/p>\n<p>\u5728\u5b9e\u9645\u9879\u76ee\u4e2d&#xff0c;\u8fd9\u79cdPWM\u9a71\u52a84~20mA\u7684\u65b9\u6848\u5df2\u7ecf\u6210\u529f\u5e94\u7528\u4e8e\u591a\u79cd\u5de5\u4e1a\u573a\u666f&#xff0c;\u5305\u62ec\u6e29\u5ea6\u53d8\u9001\u5668\u3001\u6db2\u4f4d\u8ba1\u548c\u6d41\u91cf\u8ba1\u7b49\u3002\u5176\u9ad8\u7cbe\u5ea6\u3001\u4f4e\u6210\u672c\u548c\u826f\u597d\u7684\u53ef\u9760\u6027\u5f97\u5230\u4e86\u73b0\u573a\u9a8c\u8bc1\u3002\u7279\u522b\u662f\u5728\u73af\u5883\u6761\u4ef6\u53d8\u5316\u7684\u573a\u5408&#xff0c;\u901a\u8fc7\u5f15\u5165\u6e29\u5ea6\u8865\u507f\u548c\u5b9a\u671f\u81ea\u6821\u51c6\u673a\u5236&#xff0c;\u7cfb\u7edf\u80fd\u591f\u957f\u671f\u4fdd\u6301\u9ad8\u4e8e0.1\u7ea7\u7684\u7cbe\u5ea6\u7b49\u7ea7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1&#xff1a;PWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3<br \/>\n\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u4e0e\u8fc7\u7a0b\u63a7\u5236\u9886\u57df&#xff0c;4~20mA\u7535\u6d41\u73af\u4f5c\u4e3a\u4e00\u79cd\u7ecf\u5178\u4e14\u53ef\u9760\u7684\u4fe1\u53f7\u4f20\u8f93\u6807\u51c6&#xff0c;\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4f20\u611f\u5668\u3001\u6267\u884c\u5668\u548c\u63a7\u5236\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u3002\u5176\u4f18\u52bf\u5728\u4e8e\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u3001\u4f20\u8f93\u8ddd\u79bb\u8fdc&#xff0c;\u4e14\u80fd\u591f\u901a\u8fc7\u7535\u6d41\u503c\u540c\u65f6\u4f20\u9012\u4fe1\u53f7\u548c\u4f9b\u7535\u3002\u7136\u800c&#xff0c;\u5982\u4f55\u5c06\u5fae\u63a7\u5236\u5668\u751f\u6210\u7684PWM\u4fe1\u53f7\u9ad8\u6548\u3001\u7cbe\u786e\u5730\u8f6c\u6362\u4e3a\u7a33\u5b9a\u76844~20mA\u7535\u6d41\u8f93\u51fa&#xff0c;\u662f\u8bb8\u591a\u786c\u4ef6\u5de5\u7a0b\u5e08\u548c\u7cfb\u7edf\u67b6\u6784\u5e08\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u5fc5\u987b\u9762\u5bf9\u7684<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[8133,7952,7881,217],"topic":[],"class_list":["post-75970","post","type-post","status-publish","format-standard","hentry","category-server","tag-420ma","tag-pwm","tag-7881","tag-stm32"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/75970.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1&#xff1a;PWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3 \u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u4e0e\u8fc7\u7a0b\u63a7\u5236\u9886\u57df&#xff0c;4~20mA\u7535\u6d41\u73af\u4f5c\u4e3a\u4e00\u79cd\u7ecf\u5178\u4e14\u53ef\u9760\u7684\u4fe1\u53f7\u4f20\u8f93\u6807\u51c6&#xff0c;\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4f20\u611f\u5668\u3001\u6267\u884c\u5668\u548c\u63a7\u5236\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u3002\u5176\u4f18\u52bf\u5728\u4e8e\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u3001\u4f20\u8f93\u8ddd\u79bb\u8fdc&#xff0c;\u4e14\u80fd\u591f\u901a\u8fc7\u7535\u6d41\u503c\u540c\u65f6\u4f20\u9012\u4fe1\u53f7\u548c\u4f9b\u7535\u3002\u7136\u800c&#xff0c;\u5982\u4f55\u5c06\u5fae\u63a7\u5236\u5668\u751f\u6210\u7684PWM\u4fe1\u53f7\u9ad8\u6548\u3001\u7cbe\u786e\u5730\u8f6c\u6362\u4e3a\u7a33\u5b9a\u76844~20mA\u7535\u6d41\u8f93\u51fa&#xff0c;\u662f\u8bb8\u591a\u786c\u4ef6\u5de5\u7a0b\u5e08\u548c\u7cfb\u7edf\u67b6\u6784\u5e08\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u5fc5\u987b\u9762\u5bf9\u7684\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/75970.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-13T09:05:36+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/75970.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/75970.html\",\"name\":\"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-02-13T09:05:36+00:00\",\"dateModified\":\"2026-02-13T09:05:36+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/75970.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/75970.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/75970.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/75970.html","og_locale":"zh_CN","og_type":"article","og_title":"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1&#xff1a;PWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3 \u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u4e0e\u8fc7\u7a0b\u63a7\u5236\u9886\u57df&#xff0c;4~20mA\u7535\u6d41\u73af\u4f5c\u4e3a\u4e00\u79cd\u7ecf\u5178\u4e14\u53ef\u9760\u7684\u4fe1\u53f7\u4f20\u8f93\u6807\u51c6&#xff0c;\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u4f20\u611f\u5668\u3001\u6267\u884c\u5668\u548c\u63a7\u5236\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u3002\u5176\u4f18\u52bf\u5728\u4e8e\u6297\u5e72\u6270\u80fd\u529b\u5f3a\u3001\u4f20\u8f93\u8ddd\u79bb\u8fdc&#xff0c;\u4e14\u80fd\u591f\u901a\u8fc7\u7535\u6d41\u503c\u540c\u65f6\u4f20\u9012\u4fe1\u53f7\u548c\u4f9b\u7535\u3002\u7136\u800c&#xff0c;\u5982\u4f55\u5c06\u5fae\u63a7\u5236\u5668\u751f\u6210\u7684PWM\u4fe1\u53f7\u9ad8\u6548\u3001\u7cbe\u786e\u5730\u8f6c\u6362\u4e3a\u7a33\u5b9a\u76844~20mA\u7535\u6d41\u8f93\u51fa&#xff0c;\u662f\u8bb8\u591a\u786c\u4ef6\u5de5\u7a0b\u5e08\u548c\u7cfb\u7edf\u67b6\u6784\u5e08\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u5fc5\u987b\u9762\u5bf9\u7684","og_url":"https:\/\/www.wsisp.com\/helps\/75970.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-02-13T09:05:36+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"3 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/75970.html","url":"https:\/\/www.wsisp.com\/helps\/75970.html","name":"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-02-13T09:05:36+00:00","dateModified":"2026-02-13T09:05:36+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/75970.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/75970.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/75970.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4fe1\u53f7\u94fe\u8bbe\u8ba1\uff1aPWM\u5982\u4f55\u9a71\u52a84~20mA\u5de5\u4e1a\u6807\u51c6\u63a5\u53e3"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/75970","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=75970"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/75970\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=75970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=75970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=75970"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=75970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}