{"id":9522,"date":"2022-09-05T16:13:23","date_gmt":"2022-09-05T08:13:23","guid":{"rendered":"http:\/\/www.szryc.com\/?p=9522"},"modified":"2022-09-05T16:13:23","modified_gmt":"2022-09-05T08:13:23","slug":"%e5%8f%8d%e6%bf%80%e5%bc%8f%e8%bd%ac%e6%8d%a2%e5%99%a8%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86%e5%8f%8a%e6%8b%93%e6%89%91%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=9522","title":{"rendered":"\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u7684\u5de5\u4f5c\u539f\u7406\u53ca\u62d3\u6251\u7ed3\u6784"},"content":{"rendered":"

\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668(Flyback Converte<\/u>r)\u7684\u8bbe\u8ba1\u7c7b\u4f3c\u4e8e70\u5e74\u524d\u7684\u5f00\u5173<\/u>\u6a21\u5f0f\u7535\u6e90<\/u>\uff0c\u53ef\u4ee5\u6267\u884c\u4efb\u4f55\u7c7b\u578b\u7684\u8f6c\u6362\uff0c\u4f8b\u5982AC-DC\u548cDC-DC\u3002\u53cd\u6fc0\u5f0f\u7684\u8bbe\u8ba1\u4e3a\u6700\u65e9\u57281930\u5e74\u4ee3\u81f31940\u5e74\u4ee3\u5f00\u53d1\u7528\u4e8e\u901a\u4fe1\u7684\u7535\u89c6\u63d0\u4f9b\u4e86\u4f18\u52bf\u3002<\/p>\n

\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u4f7f\u7528\u7684\u662f\u975e\u7ebf\u6027\u5f00\u5173\u7535\u6e90\u6982\u5ff5\uff0c\u4e0e\u975e\u53cd\u6fc0\u5f0f\u8bbe\u8ba1\u76f8\u6bd4\uff0c\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u5b58\u50a8\u78c1\u80fd\u5e76\u5145\u5f53\u7535\u611f\u5668<\/u>\u3002\u672c\u6587\u7b80\u5355\u4ecb\u7ecd\u4e0b\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u5de5\u4f5c\u539f\u7406\u548c\u7535\u8def<\/u>\u7c7b\u578b\u3002<\/p>\n

\u57fa\u672c\u6982\u5ff5<\/p>\n

\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u4e5f\u79f0\u4e4b\u4e3a\u7535\u6e90\u8f6c\u6362\u5668\uff0c\u5b83\u5c06\u4ea4\u6d41\u7535\u8f6c\u6362\u4e3a\u76f4\u6d41\u7535\uff0c\u5e76\u5728\u8f93\u5165\u548c\u8f93\u51fa\u4e4b\u95f4\u8fdb\u884c\u7535\u6d41\u9694\u79bb\u3002\u5b83\u5728\u7535\u6d41\u6d41\u8fc7\u7535\u8def\u65f6\u50a8\u5b58\u80fd\u91cf\uff0c\u5e76\u5728\u65ad\u7535\u65f6\u91ca\u653e\u80fd\u91cf\u3002\u5b83\u4f7f\u7528\u4e86\u4e00\u4e2a\u76f8\u4e92\u8026\u5408<\/u>\u7684\u7535\u611f<\/u>\u5668\uff0c\u5e76\u7528\u4f5c\u964d\u538b\u6216\u5347\u538b\u53d8\u538b\u5668\u7684\u9694\u79bb\u5f00\u5173\u8f6c\u6362\u5668\u3002<\/p>\n

\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u53ef\u4ee5\u63a7\u5236\u548c\u8c03\u8282\u5177\u6709\u5bbd\u8f93\u5165\u7535\u538b\u8303\u56f4\u7684\u591a\u4e2a\u8f93\u51fa\u7535\u538b\u3002\u4e0e\u5176\u4ed6\u5f00\u5173\u6a21\u5f0f\u7535\u6e90\u7535\u8def\u76f8\u6bd4\uff0c\u8bbe\u8ba1\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u6240\u9700\u7684\u7ec4\u4ef6\u5f88\u5c11\u3002\u53cd\u6fc0\u8fd9\u4e2a\u8bcd\u88ab\u79f0\u4e3a\u8bbe\u8ba1\u4e2d\u4f7f\u7528\u7684\u5f00\u5173\u7684\u201c\u5f00\/\u5173\u201d\u52a8\u4f5c\u3002<\/p>\n

\u7ed3\u6784\u8bbe\u8ba1<\/p>\n

\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u8bbe\u8ba1\u975e\u5e38\u7b80\u5355\uff0c\u5305\u542b\u53cd\u6fc0\u5f0f\u53d8\u538b\u5668<\/u>\u3001\u5f00\u5173\u3001\u6574\u6d41\u5668\u3001\u6ee4\u6ce2\u5668<\/u>\u7b49\u7535\u6c14\u5143\u4ef6\uff0c\u4ee5\u53ca\u9a71\u52a8\u5f00\u5173\u548c\u5b9e\u73b0\u8c03\u8282\u7684\u63a7\u5236\u88c5\u7f6e\u3002\u5176\u7535\u8def\u8bbe\u8ba1<\/u>\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"poYBAGMVqMmAOfdVAAAbcvS-1zQ725\"<\/p>\n

\u5f00\u5173\u7528\u4e8e\u63a5\u901a\u548c\u5173\u65ad\u521d\u7ea7\u7535\u8def\uff0c\u53ef\u4ee5\u4f7f\u53d8\u538b\u5668\u78c1\u5316\u6216\u9000\u78c1\u3002\u6765\u81ea\u63a7\u5236\u5668\u7684PWM\u4fe1\u53f7\u63a7\u5236\u5f00\u5173\u7684\u64cd\u4f5c\u3002\u5728\u5927\u591a\u6570\u53cd\u6fc0\u53d8\u538b\u5668\u8bbe\u8ba1\u4e2d\uff0cFET\u3001MOSFET<\/u>\u6216\u57fa\u672c\u6676\u4f53\u7ba1<\/u>\u7528\u4f5c\u5f00\u5173\u3002<\/p>\n

\u6574\u6d41\u5668\u5bf9\u6b21\u7ea7\u7ed5\u7ec4\u7684\u7535\u538b\u8fdb\u884c\u6574\u6d41\u4ee5\u83b7\u5f97\u8109\u52a8\u76f4\u6d41\u8f93\u51fa\uff0c\u5e76\u5c06\u8d1f\u8f7d\u4e0e\u53d8\u538b\u5668\u7684\u6b21\u7ea7\u7ed5\u7ec4\u65ad\u5f00\u3002\u7535\u5bb9\u5668<\/u>\u8fc7\u6ee4\u6574\u6d41\u5668\u8f93\u51fa\u7535\u538b\u5e76\u6839\u636e\u6240\u9700\u5e94\u7528\u589e\u52a0\u76f4\u6d41\u8f93\u51fa\u7535\u5e73\u3002<\/p>\n

\u53cd\u6fc0\u53d8\u538b\u5668\u7528\u4f5c\u5b58\u50a8\u78c1\u80fd\u7684\u7535\u611f\u5668\uff0c\u5b83\u88ab\u8bbe\u8ba1\u4e3a\u4e00\u4e2a\u53cc\u8026\u5408\u7535\u611f\u5668\uff0c\u7528\u4f5c\u521d\u7ea7\u548c\u6b21\u7ea7\u7ed5\u7ec4\uff0c\u5e76\u4e14\u4ee5\u63a5\u8fd150KHz\u7684\u9ad8\u9891\u7387\u5de5\u4f5c\u3002<\/p>\n

\u5173\u7cfb\u5f0f\u63a8\u5bfc<\/p>\n

\u6709\u5fc5\u8981\u8003\u8651\u531d\u6570\u6bd4\u3001\u5360\u7a7a\u6bd4\u4ee5\u53ca\u521d\u7ea7\u548c\u6b21\u7ea7\u7ed5\u7ec4\u7535\u6d41<\/u>\u7684\u53cd\u6fc0\u8f6c\u6362\u5668\u5173\u7cfb\u5f0f\u8ba1\u7b97\u3002\u56e0\u4e3a\u531d\u6570\u6bd4\u53ef\u80fd\u4f1a\u5f71\u54cd\u6d41\u7ecf\u521d\u7ea7\u548c\u6b21\u7ea7\u7ed5\u7ec4\u7684\u7535\u6d41\u4ee5\u53ca\u5360\u7a7a\u6bd4\u3002\u5f53\u531d\u6570\u6bd4\u9ad8\u65f6\uff0c\u5360\u7a7a\u6bd4\u4e5f\u53d8\u9ad8\uff0c\u901a\u8fc7\u521d\u7ea7\u548c\u6b21\u7ea7\u7ed5\u7ec4\u7684\u7535\u6d41\u51cf\u5c0f\u3002<\/p>\n

\u7531\u4e8e\u7535\u8def\u4e2d\u4f7f\u7528\u7684\u53d8\u538b\u5668\u662f\u5b9a\u5236\u7c7b\u578b\uff0c\u56e0\u6b64\u76ee\u524d\u4e0d\u53ef\u80fd\u83b7\u5f97\u5177\u6709\u531d\u6570\u6bd4\u7684\u5b8c\u7f8e\u53d8\u538b\u5668\u3002\u6240\u4ee5\uff0c\u901a\u8fc7\u9009\u62e9\u5177\u6709\u6240\u9700\u989d\u5b9a\u503c\u4e14\u66f4\u63a5\u8fd1\u6240\u9700\u989d\u5b9a\u503c\u7684\u53d8\u538b\u5668\uff0c\u53ef\u4ee5\u8865\u507f\u7535\u538b\u548c\u8f93\u51fa\u7684\u5dee\u5f02\u3002<\/p>\n

\u6b64\u5916\uff0c\u8fd8\u5e94\u8be5\u8003\u8651\u5176\u5b83\u53c2\u6570\uff0c\u4f8b\u6838\u5fc3\u6750\u6599\u3001\u6c14\u9699\u7684\u5f71\u54cd\u548c\u6781\u5316\u3002\u4e0b\u9762\u8ba8\u8bba\u901a\u8fc7\u8003\u8651\u5f00\u5173\u4f4d\u7f6e\u7684\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u5173\u7cfb\u5f0f\u8ba1\u7b97\u3002<\/p>\n

1\u3001\u5f53\u5f00\u5173\u6253\u5f00\u65f6\uff1a<\/p>\n

Vin \u2013 VL \u2013 Vs = 0\u3002<\/p>\n

\u5728\u7406\u60f3\u6761\u4ef6\u4e0b\uff0cVs = 0(\u7535\u538b\u964d)\uff0c\u90a3\u4e48Vin \u2013 VL = 0\u3001VL = Lp di\/dt\u3001di = (VL \/ Lp) x dt\u3002<\/p>\n

\u7531\u4e8eVL = Vin\uff0c\u6240\u4ee5di = (Vin \/ Lp) x dt\u3002<\/p>\n

\u901a\u8fc7\u5728\u4e24\u8fb9\u5e94\u7528\u96c6\u6210\uff0c\u53ef\u4ee5\u5f97\u5230\u521d\u7ea7\u7ed5\u7ec4\u4e0a\u7684\u7535\u6d41\u4e3a\uff1aIpri =( Vin. \/Lp )Ton\u3002<\/p>\n

\u521d\u7ea7\u7ed5\u7ec4\u4e2d\u5b58\u50a8\u7684\u603b\u80fd\u91cf\u4e3a\uff1aEpri = \u00bd Ipri 2 X Lp\u3002<\/p>\n

\u5176\u4e2dVin=\u8f93\u5165\u7535\u538b\u3001Lp=\u521d\u7ea7\u7ed5\u7ec4\u7684\u7535\u611f\u6216\u521d\u7ea7\u7535\u611f\u3001Ton=\u5f00\u5173\u6253\u5f00\u7684\u65f6\u95f4\u3002<\/p>\n

2\u3001\u5f53\u5f00\u5173\u5173\u95ed\u65f6\uff1a<\/p>\n

VL(\u6b21\u7ea7) \u2013 VD \u2013 Vout = 0\u3002<\/p>\n

\u5728\u7406\u60f3\u6761\u4ef6\u4e0b\uff0c\u4e8c\u6781\u7ba1<\/u>\u7535\u538b\u964d\u4e3a\u96f6\uff0c\u6240\u4ee5VL(\u6b21\u7ea7)\u2013 Vout = 0\uff0cVL(\u6b21\u7ea7)= Vout\uff0cVL = Ls di\/dt\uff0cdi = (VL \u6b21\u7ea7 \/ Ls) \/ dt\u3002<\/p>\n

\u7531\u4e8eVL\u6b21\u7ea7=Vout\uff0c\u56e0\u6b64di = Vout \/ Ls) X dt\u3002<\/p>\n

\u901a\u8fc7\u5e94\u7528\u96c6\u6210\uff0c\u53ef\u4ee5\u5f97\u5230\uff1aIsec = (Vsec\/Ls) (T \u2013 Ton)\u3002<\/p>\n

\u8f6c\u79fb\u7684\u603b\u80fd\u91cf\u8868\u793a\u4e3a\uff1aEsec = \u00bd[(Vsec\/Ls). (T \u2013 Ton) ]2. Ls<\/p>\n

\u5176\u4e2dVsec =\u6b21\u7ea7\u7ed5\u7ec4\u4e2d\u7684\u7535\u538b = \u8d1f\u8f7d\u5904\u7684\u603b\u8f93\u51fa\u7535\u538b\u3001Ls=\u6b21\u7ea7\u7ed5\u7ec4\u7684\u7535\u611f\u3001T=pwm\u4fe1\u53f7\u5468\u671f\u3001Ton=\u5f00\u542f\u65f6\u95f4\u3002<\/p>\n

\u5de5\u4f5c\u539f\u7406<\/p>\n

\u4ece\u4e0a\u56fe\u4e2d\u53ef\u4ee5\u5f88\u5bb9\u6613\u77e5\u9053\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u5176\u5de5\u4f5c\u539f\u7406\u57fa\u4e8e\u5f00\u5173\u6a21\u5f0f\u7535\u6e90(SMPS)\u6a21\u5f0f\u3002<\/p>\n

\u5f53\u5f00\u5173\u5904\u4e8eON\u4f4d\u7f6e\u65f6\uff0c\u8f93\u5165\u548c\u8d1f\u8f7d\u4e4b\u95f4\u6ca1\u6709\u80fd\u91cf\u4f20\u8f93\u3002\u603b\u80fd\u91cf\u5c06\u5b58\u50a8\u5728\u7535\u8def\u7684\u521d\u7ea7\u7ed5\u7ec4\u4e2d\u3002\u8fd9\u91cc\u6f0f\u6781\u7535\u538bVd=0\uff0c\u7535\u6d41Ip\u901a\u8fc7\u521d\u7ea7\u7ed5\u7ec4\u3002\u80fd\u91cf\u4ee5\u53d8\u538b\u5668\u78c1\u611f\u7684\u5f62\u5f0f\u5b58\u50a8\uff0c\u7535\u6d41\u968f\u65f6\u95f4\u7ebf\u6027\u589e\u52a0\u3002\u7136\u540e\u4e8c\u6781\u7ba1\u53d8\u4e3a\u53cd\u5411\u504f\u7f6e\uff0c\u6ca1\u6709\u7535\u6d41\u6d41\u5411\u53d8\u538b\u5668\u7684\u6b21\u7ea7\u7ed5\u7ec4\uff0c\u603b\u80fd\u91cf\u5b58\u50a8\u5728\u8f93\u51fa\u7aef\u4f7f\u7528\u7684\u7535\u5bb9<\/u>\u5668\u4e2d\u3002<\/p>\n

\u5f53\u5f00\u5173\u5904\u4e8e\u5173\u95ed\u4f4d\u7f6e\u65f6\uff0c\u7531\u4e8e\u78c1\u573a\u7684\u4f5c\u7528\uff0c\u901a\u8fc7\u6539\u53d8\u53d8\u538b\u5668\u7ed5\u7ec4\u7684\u6781\u6027\uff0c\u80fd\u91cf\u88ab\u4f20\u9012\u5230\u8d1f\u8f7d\uff0c\u6574\u6d41\u7535\u8def\u5f00\u59cb\u5bf9\u7535\u538b\u8fdb\u884c\u6574\u6d41\u3002\u6838\u5fc3\u4e2d\u7684\u603b\u80fd\u91cf\u5c06\u88ab\u8f6c\u79fb\u5230\u8d1f\u8f7d\u5c06\u88ab\u6574\u6d41\uff0c\u5e76\u4e14\u8be5\u8fc7\u7a0b\u5c06\u7ee7\u7eed\uff0c\u76f4\u5230\u6838\u5fc3\u4e2d\u7684\u80fd\u91cf\u8017\u5c3d\u6216\u76f4\u5230\u5f00\u5173\u6253\u5f00\u3002<\/p>\n

\u53cd\u6fc0\u5f0f\u62d3\u6251\u7ed3\u6784<\/p>\n

\u53cd\u6fc0\u5f0f\u8f6c\u6362\u5668\u62d3\u6251\u7ed3\u6784\u9002\u5e94\u6027\u5f3a\u3001\u7075\u6d3b\u3001\u7b80\u5355\u4e14\u4e3b\u8981\u4f7f\u7528SMPS(\u5f00\u5173\u6a21\u5f0f\u7535\u6e90)\u8bbe\u8ba1\uff0c\u5177\u6709\u826f\u597d\u7684\u6027\u80fd\u7279\u6027\uff0c\u53ef\u4e3a\u8bb8\u591a\u5e94\u7528\u5e26\u6765\u4f18\u52bf\uff0c\u5176\u6027\u80fd\u7279\u5f81\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/p>\n

\"pYYBAGMVqMmAF4umAAAmEVDQ054740\"<\/p>\n

\u4e0a\u8ff0\u6ce2\u5f62\u663e\u793a\u4e86\u53cd\u6fc0\u53d8\u538b\u5668\u521d\u7ea7\u548c\u6b21\u7ea7\u7ed5\u7ec4\u7684\u7a81\u53d8\u548c\u53cd\u5411\u7535\u6d41\u3002\u8f93\u51fa\u7535\u538b\u5c06\u901a\u8fc7\u8c03\u6574\u521d\u7ea7\u7ed5\u7ec4\u5360\u7a7a\u6bd4\u7684\u5f00\/\u5173\u52a8\u4f5c\u6765\u8c03\u8282\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u53cd\u9988\u6765\u9694\u79bb\u8f93\u5165\u548c\u8f93\u51fa\uff0c\u6216\u8005\u5728\u53d8\u538b\u5668\u4e0a\u4f7f\u7528\u989d\u5916\u7684\u7ed5\u7ec4\u3002<\/p>\n

\u53cd\u6fc0\u5f0f\u5f00\u5173\u7535\u6e90<\/u>(SMPS)<\/p>\n

\u53cd\u6fc0\u5f0f\u62d3\u6251SMPS\u8bbe\u8ba1\u8981\u6c42\u66f4\u5c11\u3002\u4e0e\u5176\u4ed6SMPS\u62d3\u6251\u76f8\u6bd4\uff0c\u53cd\u6fc0\u5f0f\u62d3\u6251SMPS\u5728\u7ed9\u5b9a\u529f\u7387\u8303\u56f4\u5185\u7684\u7ec4\u4ef6\uff0c\u53ef\u4ee5\u4e3a\u7ed9\u5b9a\u7684\u4ea4\u6d41\u6216\u76f4\u6d41\u7535\u6e90\u5de5\u4f5c\u3002\u5982\u679c\u8f93\u5165\u6765\u81ea\u4ea4\u6d41\u7535\u6e90\uff0c\u5219\u8f93\u51fa\u7535\u538b\u5c06\u88ab\u5b8c\u5168\u6574\u6d41\u3002\u8fd9\u91ccMOSFET\u7528\u4f5cSMPS\u3002<\/p>\n

SMPS\u53cd\u6fc0\u62d3\u6251\u7684\u8fd0\u884c\u5b8c\u5168\u57fa\u4e8e\u5f00\u5173\u5373MOSFET\u7684\u4f4d\u7f6e\uff0c\u7535\u8def\u56fe\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

\"poYBAGMVqMmABrffAAApVPYS0OI318\"<\/p>\n

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SMPS\u53cd\u6fc0\u5f0f\u53d8\u538b\u5668<\/p>\n

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