{"id":10021203,"date":"2026-01-21T11:02:21","date_gmt":"2026-01-21T03:02:21","guid":{"rendered":"https:\/\/itmax.cn\/?p=10021203"},"modified":"2026-01-21T11:02:21","modified_gmt":"2026-01-21T03:02:21","slug":"%e4%bb%80%e4%b9%88%e6%98%af%e4%b8%89%e6%9e%81%e7%ae%a1%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10021203","title":{"rendered":"\u4ec0\u4e48\u662f\u4e09\u6781\u7ba1\uff1f"},"content":{"rendered":"<p>\u5927\u5bb6\u597d\uff0c\u6211\u662f\u826f\u8bb8<\/p>\n<p>\u8bf4\u5230\u4e09\u6781\u7ba1\uff0c\u53ef\u80fd\u5f88\u591a\u521a\u5165\u95e8\u7684\u670b\u53cb\u4f1a\u89c9\u5f97\u8fd9\u4e2a\u540d\u5b57\u6709\u70b9\u964c\u751f\uff0c\u4f46\u5982\u679c\u4f60\u63a5\u89e6\u8fc7\u7535\u5b50\u7535\u8def\u6216\u8005\u5d4c\u5165\u5f0f\u5f00\u53d1\uff0c\u90a3\u4f60\u4e00\u5b9a\u89c1\u8fc7\u5b83\u7684\u8eab\u5f71\u3002<\/p>\n<p>\u4e09\u6781\u7ba1\u53ef\u4ee5\u8bf4\u662f\u7535\u5b50\u4e16\u754c\u91cc\u6700\u57fa\u7840\u3001\u6700\u91cd\u8981\u7684\u5143\u5668\u4ef6\u4e4b\u4e00\uff0c\u51e0\u4e4e\u6240\u6709\u7684\u7535\u5b50\u8bbe\u5907\u91cc\u90fd\u80fd\u627e\u5230\u5b83\u7684\u8e2a\u8ff9\u3002<\/p>\n<p>\u4eca\u5929\u54b1\u4eec\u5c31\u6765\u804a\u804a\u4e09\u6781\u7ba1\u5230\u5e95\u662f\u4ec0\u4e48\uff0c\u5b83\u6709\u4ec0\u4e48\u7528\uff0c\u4ee5\u53ca\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u6211\u4eec\u8be5\u600e\u4e48\u4f7f\u7528\u5b83\u3002<\/p>\n<h2>1. \u4e09\u6781\u7ba1\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<h3>1.1 \u4e09\u6781\u7ba1\u662f\u4ec0\u4e48<\/h3>\n<p>\u4e09\u6781\u7ba1\uff0c\u5168\u79f0\u53eb\u505a&#8221;\u534a\u5bfc\u4f53\u4e09\u6781\u7ba1&#8221;\uff0c\u82f1\u6587\u540d\u662f Transistor\uff0c\u6709\u65f6\u5019\u4e5f\u53eb\u505a\u6676\u4f53\u7ba1\u3002<\/p>\n<p>\u4ece\u540d\u5b57\u5c31\u80fd\u770b\u51fa\u6765\uff0c\u5b83\u6709\u4e09\u4e2a\u7535\u6781\uff0c\u8fd9\u4e5f\u662f&#8221;\u4e09\u6781\u7ba1&#8221;\u540d\u5b57\u7684\u7531\u6765\u3002<\/p>\n<p>\u8fd9\u4e09\u4e2a\u7535\u6781\u5206\u522b\u53eb\u505a\uff1a\u57fa\u6781\uff08Base\uff0c\u7b80\u79f0 B\uff09\u3001\u96c6\u7535\u6781\uff08Collector\uff0c\u7b80\u79f0 C\uff09\u548c\u53d1\u5c04\u6781\uff08Emitter\uff0c\u7b80\u79f0 E\uff09\u3002<\/p>\n<p>\u4e09\u6781\u7ba1\u672c\u8d28\u4e0a\u662f\u4e00\u79cd\u534a\u5bfc\u4f53\u5668\u4ef6\uff0c\u5b83\u662f\u7531\u4e24\u4e2a PN \u7ed3\u7ec4\u6210\u7684\u3002\u6839\u636e\u8fd9\u4e24\u4e2a PN \u7ed3\u7684\u6392\u5217\u65b9\u5f0f\u4e0d\u540c\uff0c\u4e09\u6781\u7ba1\u53ef\u4ee5\u5206\u4e3a NPN \u578b\u548c PNP \u578b\u4e24\u79cd\u3002<\/p>\n<p>NPN \u578b\u5c31\u662f\u4e2d\u95f4\u662f P \u578b\u534a\u5bfc\u4f53\uff0c\u4e24\u8fb9\u662f N \u578b\u534a\u5bfc\u4f53\uff1bPNP \u578b\u5219\u76f8\u53cd\uff0c\u4e2d\u95f4\u662f N \u578b\u534a\u5bfc\u4f53\uff0c\u4e24\u8fb9\u662f P \u578b\u534a\u5bfc\u4f53\u3002<\/p>\n<p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cNPN \u578b\u4e09\u6781\u7ba1\u4f7f\u7528\u5f97\u66f4\u591a\u4e00\u4e9b\u3002<\/p>\n<h3>1.2 \u4e09\u6781\u7ba1\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n<p>\u4e09\u6781\u7ba1\u6700\u795e\u5947\u7684\u5730\u65b9\u5728\u4e8e\uff0c\u5b83\u53ef\u4ee5\u7528\u4e00\u4e2a\u5f88\u5c0f\u7684\u7535\u6d41\u53bb\u63a7\u5236\u4e00\u4e2a\u5f88\u5927\u7684\u7535\u6d41\u3002<\/p>\n<p>\u5177\u4f53\u6765\u8bf4\uff0c\u5c31\u662f\u901a\u8fc7\u63a7\u5236\u57fa\u6781\u548c\u53d1\u5c04\u6781\u4e4b\u95f4\u7684\u7535\u6d41\uff08\u57fa\u6781\u7535\u6d41\uff0c\u8bb0\u4f5cIB\u200b\uff09\uff0c\u6765\u63a7\u5236\u96c6\u7535\u6781\u548c\u53d1\u5c04\u6781\u4e4b\u95f4\u7684\u7535\u6d41\uff08\u96c6\u7535\u6781\u7535\u6d41\uff0c\u8bb0\u4f5cIC\uff09\u3002<\/p>\n<p>\u8fd9\u4e2a\u8fc7\u7a0b\u5c31\u50cf\u662f\u7528\u4e00\u4e2a\u5c0f\u6c34\u9f99\u5934\u53bb\u63a7\u5236\u4e00\u4e2a\u5927\u6c34\u9f99\u5934\u7684\u5f00\u5173\u4e00\u6837\u3002<\/p>\n<p>\u8fd9\u91cc\u6709\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u53c2\u6570\uff0c\u53eb\u505a\u7535\u6d41\u653e\u5927\u500d\u6570\uff0c\u7528\u5e0c\u814a\u5b57\u6bcd\u03b2\uff08\u8d1d\u5854\uff09\u6765\u8868\u793a\u3002\u8fd9\u4e2a\u03b2\u503c\u8868\u793a\u7684\u662f\u96c6\u7535\u6781\u7535\u6d41\u548c\u57fa\u6781\u7535\u6d41\u7684\u6bd4\u503c\uff0c\u4e5f\u5c31\u662f\uff1a<\/p>\n<p>$$<br \/>\n\/beta = \/frac{I_C}{I_B}<br \/>\n$$<\/p>\n<p>\u4e00\u822c\u6765\u8bf4\uff0c\u666e\u901a\u4e09\u6781\u7ba1\u7684\u03b2\u503c\u5728\u51e0\u5341\u5230\u51e0\u767e\u4e4b\u95f4\u3002<\/p>\n<p>\u6bd4\u5982\u8bf4\uff0c\u5982\u679c\u4e00\u4e2a\u4e09\u6781\u7ba1\u7684\u03b2\u503c\u662f 100\uff0c\u90a3\u4e48\u5f53\u57fa\u6781\u7535\u6d41\u662f 1mA \u7684\u65f6\u5019\uff0c\u96c6\u7535\u6781\u7535\u6d41\u5c31\u53ef\u4ee5\u8fbe\u5230 100mA\u3002\u8fd9\u5c31\u662f\u4e09\u6781\u7ba1\u7684\u653e\u5927\u4f5c\u7528\u3002<\/p>\n<h3>1.3 \u4e09\u6781\u7ba1\u7684\u4e09\u79cd\u5de5\u4f5c\u72b6\u6001<\/h3>\n<p>\u4e09\u6781\u7ba1\u5728\u7535\u8def\u4e2d\u6709\u4e09\u79cd\u57fa\u672c\u7684\u5de5\u4f5c\u72b6\u6001\uff1a\u622a\u6b62\u72b6\u6001\u3001\u653e\u5927\u72b6\u6001\u548c\u9971\u548c\u72b6\u6001\u3002<\/p>\n<p><strong>\u622a\u6b62\u72b6\u6001<\/strong>\uff1a\u5f53\u57fa\u6781\u7535\u6d41\u4e3a\u96f6\u6216\u8005\u5f88\u5c0f\u7684\u65f6\u5019\uff0c\u4e09\u6781\u7ba1\u5c31\u5904\u4e8e\u622a\u6b62\u72b6\u6001\u3002<\/p>\n<p>\u8fd9\u65f6\u5019\u96c6\u7535\u6781\u7535\u6d41\u4e5f\u57fa\u672c\u4e3a\u96f6\uff0c\u4e09\u6781\u7ba1\u76f8\u5f53\u4e8e\u4e00\u4e2a\u65ad\u5f00\u7684\u5f00\u5173\u3002<\/p>\n<p><strong>\u653e\u5927\u72b6\u6001<\/strong>\uff1a\u5f53\u57fa\u6781\u7535\u6d41\u5728\u4e00\u4e2a\u5408\u9002\u7684\u8303\u56f4\u5185\u65f6\uff0c\u4e09\u6781\u7ba1\u5c31\u5de5\u4f5c\u5728\u653e\u5927\u72b6\u6001\u3002\u8fd9\u65f6\u5019\u96c6\u7535\u6781\u7535\u6d41\u548c\u57fa\u6781\u7535\u6d41\u6210\u6b63\u6bd4\u5173\u7cfb\uff0c\u4e5f\u5c31\u662fIC\u200b=\u03b2\u00d7IB\u3002<\/p>\n<p>\u8fd9\u4e2a\u72b6\u6001\u4e3b\u8981\u7528\u4e8e\u6a21\u62df\u7535\u8def\u4e2d\u7684\u4fe1\u53f7\u653e\u5927\u3002<\/p>\n<p><strong>\u9971\u548c\u72b6\u6001<\/strong>\uff1a\u5f53\u57fa\u6781\u7535\u6d41\u8db3\u591f\u5927\u7684\u65f6\u5019\uff0c\u4e09\u6781\u7ba1\u5c31\u8fdb\u5165\u4e86\u9971\u548c\u72b6\u6001\u3002\u8fd9\u65f6\u5019\u96c6\u7535\u6781\u7535\u6d41\u4e0d\u518d\u968f\u57fa\u6781\u7535\u6d41\u7684\u589e\u52a0\u800c\u589e\u52a0\uff0c\u4e09\u6781\u7ba1\u76f8\u5f53\u4e8e\u4e00\u4e2a\u95ed\u5408\u7684\u5f00\u5173\u3002<\/p>\n<p>\u5728\u6570\u5b57\u7535\u8def\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u8ba9\u4e09\u6781\u7ba1\u5de5\u4f5c\u5728\u9971\u548c\u72b6\u6001\u6216\u622a\u6b62\u72b6\u6001\uff0c\u7528\u6765\u5b9e\u73b0\u5f00\u5173\u529f\u80fd\u3002<\/p>\n<h2>2. \u4e09\u6781\u7ba1\u7684\u5b9e\u9645\u5e94\u7528<\/h2>\n<h3>2.1 \u4e09\u6781\u7ba1\u4f5c\u4e3a\u5f00\u5173\u4f7f\u7528<\/h3>\n<p>\u5728\u5d4c\u5165\u5f0f\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u6700\u5e38\u7528\u4e09\u6781\u7ba1\u6765\u505a\u7684\u4e8b\u60c5\u5c31\u662f\u5f53\u5f00\u5173\u7528\u3002<\/p>\n<p>\u6bd4\u5982\u8bf4\uff0cSTM32 \u7684 GPIO \u53e3\u8f93\u51fa\u7535\u6d41\u4e00\u822c\u53ea\u6709\u51e0\u5341\u6beb\u5b89\uff0c\u5982\u679c\u6211\u4eec\u8981\u9a71\u52a8\u4e00\u4e2a\u9700\u8981\u51e0\u767e\u6beb\u5b89\u7535\u6d41\u7684\u8d1f\u8f7d\uff08\u6bd4\u5982\u7ee7\u7535\u5668\u3001\u7535\u673a\u7b49\uff09\uff0c\u76f4\u63a5\u7528 GPIO \u53e3\u662f\u4e0d\u884c\u7684\uff0c\u8fd9\u65f6\u5019\u5c31\u9700\u8981\u7528\u4e09\u6781\u7ba1\u6765\u505a\u7535\u6d41\u653e\u5927\u3002<\/p>\n<p>\u4e3e\u4e2a\u5177\u4f53\u7684\u4f8b\u5b50\uff0c\u5047\u8bbe\u6211\u4eec\u8981\u7528 STM32 \u63a7\u5236\u4e00\u4e2a 12V \u7684\u7ee7\u7535\u5668\uff0c\u8fd9\u4e2a\u7ee7\u7535\u5668\u7684\u7ebf\u5708\u7535\u6d41\u662f 100mA\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u8bbe\u8ba1\u7535\u8def\uff1a\u7528 STM32 \u7684 GPIO \u53e3\u63a7\u5236\u4e09\u6781\u7ba1\u7684\u57fa\u6781\uff0c\u4e09\u6781\u7ba1\u7684\u96c6\u7535\u6781\u63a5\u7ee7\u7535\u5668\u7ebf\u5708\uff0c\u53d1\u5c04\u6781\u63a5\u5730\u3002<\/p>\n<p>\u5f53 GPIO \u53e3\u8f93\u51fa\u9ad8\u7535\u5e73\u65f6\uff0c\u4e09\u6781\u7ba1\u5bfc\u901a\uff0c\u7ee7\u7535\u5668\u5f97\u7535\u5de5\u4f5c\uff1b\u5f53 GPIO \u53e3\u8f93\u51fa\u4f4e\u7535\u5e73\u65f6\uff0c\u4e09\u6781\u7ba1\u622a\u6b62\uff0c\u7ee7\u7535\u5668\u65ad\u7535\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684 HAL \u5e93\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre><code>\/\/ \u521d\u59cb\u5316GPIO\nvoid Relay_GPIO_Init(void)\n{\n    GPIO_InitTypeDef GPIO_InitStruct = {0};\n    \n    \/\/ \u4f7f\u80fdGPIOA\u65f6\u949f\n    __HAL_RCC_GPIOA_CLK_ENABLE();\n    \n    \/\/ \u914d\u7f6ePA5\u4e3a\u8f93\u51fa\u6a21\u5f0f\n    GPIO_InitStruct.Pin = GPIO_PIN_5;\n    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;  \/\/ \u63a8\u633d\u8f93\u51fa\n    GPIO_InitStruct.Pull = GPIO_NOPULL;\n    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;\n    HAL_GPIO_Init(GPIOA, &amp;GPIO_InitStruct);\n    \n    \/\/ \u521d\u59cb\u72b6\u6001\u8bbe\u4e3a\u4f4e\u7535\u5e73\uff0c\u7ee7\u7535\u5668\u65ad\u7535\n    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);\n}\n\u200b\n\/\/ \u63a7\u5236\u7ee7\u7535\u5668\u5f00\nvoid Relay_On(void)\n{\n    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);\n}\n\u200b\n\/\/ \u63a7\u5236\u7ee7\u7535\u5668\u5173\nvoid Relay_Off(void)\n{\n    HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);\n}<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u9700\u8981\u6ce8\u610f\u51e0\u4e2a\u5173\u952e\u70b9\uff1a\u9996\u5148\u662f\u57fa\u6781\u7535\u963b\u7684\u9009\u62e9\u3002<\/p>\n<p>\u57fa\u6781\u7535\u963b\u592a\u5c0f\u4f1a\u5bfc\u81f4\u57fa\u6781\u7535\u6d41\u8fc7\u5927\uff0c\u53ef\u80fd\u635f\u574f GPIO \u53e3\uff1b\u57fa\u6781\u7535\u963b\u592a\u5927\u5219\u53ef\u80fd\u5bfc\u81f4\u4e09\u6781\u7ba1\u65e0\u6cd5\u5b8c\u5168\u5bfc\u901a\u3002<\/p>\n<p>\u4e00\u822c\u6765\u8bf4\uff0c\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u8ba1\u7b97\uff1a\u5047\u8bbe GPIO \u53e3\u8f93\u51fa\u7535\u538b\u662f 3.3V\uff0c\u4e09\u6781\u7ba1\u7684 BE \u7ed3\u538b\u964d\u7ea6 0.7V\uff0c\u6211\u4eec\u5e0c\u671b\u57fa\u6781\u7535\u6d41\u662f 1mA\uff0c\u90a3\u4e48\u57fa\u6781\u7535\u963b\u5e94\u8be5\u662f\uff1a<\/p>\n<p>$$<br \/>\nR_B = \/frac{3.3V &#8211; 0.7V}{1mA} = 2.6k\/Omega<br \/>\n$$<\/p>\n<p>\u5b9e\u9645\u5e94\u7528\u4e2d\u53ef\u4ee5\u9009\u62e9\u6807\u51c6\u963b\u503c 2.7k\u03a9 \u6216 3k\u03a9\u3002<\/p>\n<h3>2.2 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