{"id":259,"date":"2017-11-19T08:15:47","date_gmt":"2017-11-19T08:15:47","guid":{"rendered":""},"modified":"2017-11-19T16:16:35","modified_gmt":"2017-11-19T08:16:35","slug":"%e7%bb%ad%e6%b5%81%e4%ba%8c%e6%9e%81%e7%ae%a1%e7%9a%84%e7%89%b9%e6%80%a7%e5%8f%8a%e4%bd%9c%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=259","title":{"rendered":"\u7eed\u6d41\u4e8c\u6781\u7ba1\u7684\u7279\u6027\u53ca\u4f5c\u7528"},"content":{"rendered":"

\n\t  \u5feb\u6062\u590d\u4e8c\u6781\u7ba1\u4e3b\u8981\u7528\u4f5c\u7eed\u6d41\u4e8c\u6781\u7ba1\uff0c\u4e0e\u5feb\u901f\u5f00\u5173\u4e09\u6781\u7ba1\u5e76\u8054\u540e\u9762\u5e26\u611f\u6027\u8d1f\u8f7d\uff0c\u5982Buck\uff0cBoost\u53d8\u6362\u5668\u7684\u7535\u611f\u3001\u53d8\u538b\u5668\u548c\u7535\u673a\uff0c\u8fd9\u4e9b\u7535\u8def\u5927\u90e8\u5206\u662f\u7528\u6052\u8109\u8109\u5bbd\u8c03\u5236\u63a7\u5236\uff0c\u611f\u6027\u8d1f\u8f7d\u51b3\u5b9a\u4e86\u6d41\u8fc7\u7eed\u6d41\u4e8c\u6781\u7ba1\u7684\u7535\u6d41\u662f\u8fde\u7eed\u7684\uff0c\u4e09\u6781\u7ba1\u5f00\u901a\u65f6\uff0c\u7eed\u6d41\u652f\u8def\u8981\u622a\u6b62\u4ee5\u9632\u77ed\u8def\uff0c\u4e0b\u9762\u4f8b\u5b50\u7ed9\u51fa\u4e86\u4e09\u6781\u7ba1\u4e0e\u7eed\u6d41\u4e8c\u6781\u7ba1\u7684\u76f8\u4e92\u4f5c\u7528\u3002

\n\t  \u56fe1\u662f\u7b80\u5316\u7684Buck\u7535\u8def\u3002\u5176\u8f93\u51fa\u7535\u538bVout<\/sub>\u4f4e\u4e8e\u8f93\u5165\u7535\u538bVin\u3002\u56fe2\u662fT1<\/sub>\u7684\u63a7\u5236\u4fe1\u53f7\u548cT1<\/sub>\uff0cD1<\/sub>\u7684\u7535\u538b\u3001\u7535\u6d41\u6ce2\u5f62\u3002\u6709\u6e90\u5668\u4ef6T1<\/sub>\uff0cD1<\/sub>\u7684\u5f00\u901a\u5173\u65ad\u76f8\u4f4d\u5982\u4e0b\uff1a

\n\t  T0<\/sub>\u65f6\u523bT1<\/sub>\u6709\u5f00\u901a\u4fe1\u53f7\u3002\u8f93\u5165\u7535\u538bVin<\/sub>\u52a0\u5728L\uff0cCout<\/sub>\u7684\u4e32\u8054\u652f\u8def\uff0c\u4f7fiL<\/sub>\u7ebf\u6027\u589e\u52a0\u3002\u7535\u611fL\u548cVout<\/sub>\u51b3\u5b9a\u7535\u6d41\uff0c\u8fc7\u4e00\u6bb5\u65f6\u95f4\u540e\u63a7\u5236\u5668\u4f7fT1<\/sub>\u5173\u65ad\uff0c\u5728\u65ad\u7eed\u5de5\u4f5c\u65f6\uff0c\u7535\u611fL\u50a8\u80fd(W=0.5LiL2<\/sub>)\u901a\u8fc7\u7eed\u6d41\u652f\u8def\u4f20\u9001\u5230Cout<\/sub>\u3002

\n\t  \u5728t2<\/sub>\u65f6\u523bT1<\/sub>\u518d\u6b21\u5f00\u901a\uff0c\u6574\u4e2a\u8fc7\u7a0b\u91cd\u590d\u3002

\n\t  \u4e8c\u6781\u7ba1\u7684\u5f00\u5173\u8fc7\u7a0b\u53ef\u5206\u4e3a\u56db\u90e8\u5206:

\n\t  A.T1<\/sub>\u5bfc\u901a\u65f6\u4e8c\u6781\u7ba1\u963b\u65ad;

\n\t  B.\u963b\u65ad\u5230\u5bfc\u901a\u65f6\u95f4\uff1b\u5f00\u901a\uff1b

\n\t  C.T1<\/sub>\u5173\u65ad\uff0c\u4e8c\u6781\u7ba1\u5bfc\u901a\uff1b

\n\t  D.\u5bfc\u901a\u5230\u5173\u65ad\u77ac\u95f4\uff1b\u5173\u65ad\u3002<\/span><\/p>\n\n\n\n\n
\n\t\t\t\t\"\u56fe1 <\/span><\/td>\n\n\t\t\t\t\"\u56fe2 <\/span><\/td>\n<\/tr>\n
\n\t\t\t\t\u56fe1 Buck\u53d8\u6362\u5668\u7535\u8def\u56fe<\/span><\/td>\n\n\t\t\t\t\u56fe2 T1<\/sub>\u7684\u63a7\u5236\u4fe1\u53f7\u548cT1<\/sub>\uff0cD1<\/sub>\u7684\u7535\u538b\u3001\u7535\u6d41\u6ce2\u5f62<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 

\n  A.<\/strong> \u963b\u65ad<\/strong>

\n  MOFET\u5bfc\u901a\u65f6\uff0c\u4e8c\u6781\u7ba1\u4e24\u7aef\u7684\u53cd\u538b\u662fVin<\/sub>\u3002\u4e0e\u6240\u6709\u7684\u534a\u5bfc\u4f53\u4e00\u6837\uff0c\u4e8c\u6781\u7ba1\u7684\u9633\u6781\u5230\u9634\u6781\u6709\u4e00\u4e2a\u5c0f\u7535\u6d41(\u8010\u7535\u6d41IR<\/sub>)\uff0c\u6f0f\u7535\u6d41\u7531\u963b\u65ad\u7535\u538b\uff0c\u4e8c\u6781\u7ba1\u82af\u7247\u5de5\u4f5c\u6e29\u5ea6\u548c\u4e8c\u6781\u7ba1\u5236\u4f5c\u6280\u672f\u51b3\u5b9a\u3002\u53cd\u5411\u7535\u538b\u5bfc\u81f4\u7684\u603b\u529f\u7387\u635f\u8017\u662f\uff1a<\/span><\/p>\n

\n\tPSP<\/sub>=VIN<\/sub>·IR<\/sub><\/span><\/div>\n

 

\n  B.<\/strong> \u5f00\u901a<\/strong>

\n  \u4e09\u6781\u7ba1T1<\/sub>\u5173\u65ad\u77ac\u95f4\uff0c\u7535\u611f\u7535\u6d41iL<\/sub>\u4fdd\u6301\u4e0d\u53d8\u3002\u4e8c\u6781\u7ba1\u4e24\u7aef\u7535\u538b\u9010\u6e10\u51cf\u5c0f\uff0c\u7535\u6d41\u9010\u6e10\u4e0a\u5347\u3002D1<\/sub>\u7684\u7535\u6d41\u4e0a\u5347\u65f6\u95f4\u7b49\u4e8eT1<\/sub>\u7684\u7535\u6d41\u4e0b\u964d\u65f6\u95f4\u3002\u5173\u65ad\u65f6\u5728pn\u7ed3\u5b58\u50a8\u7684\u5927\u91cf\u7535\u8377\u88ab\u8f7d\u6d41\u5b50\u5e26\u8d70\uff0c\u4f7f\u5f97\u7535\u6d41\u4e0a\u5347\u65f6pn\u7ed3\u7684\u7535\u963b\u51cf\u5c0f\uff0c\u4e8c\u6781\u7ba1\u5f00\u901a\u65f6\u6709\u7535\u538b\u5c16\u5cf0\uff0c\u7531\u82af\u7247\u6e29\u5ea6\u3001-diF<\/sub>\/dt\u548c\u82af\u7247\u5de5\u827a\u51b3\u5b9a\u3002

\n  \u6b63\u5411\u7535\u538b\u5c16\u5cf0\u4e0e\u53cd\u5411\u7535\u538b\u76f8\u6bd4\u5f88\u5c0f(<50V)\uff0c\u5e94\u7528\u65f6\u4e0d\u5f71\u54cd\u4e8c\u6781\u7ba1\u7684\u5de5\u4f5c(\u56fe7\u4e2d\u7684D1<\/sub>\u6ce2\u5f62)\u3002\u4f46\u662f\u4e8c\u6781\u7ba1\u7684\u5f00\u901a\u7535\u538b\u5c16\u5cf0\u589e\u52a0\u4e86\u4e09\u6781\u7ba1\u7684\u7535\u538b\u5e94\u529b\u548c\u5173\u65ad\u635f\u8017\u3002

\n  \u7535\u538b\u5c16\u5cf0VFR<\/sub>\u51b3\u5b9a\u4e86\u4e8c\u6781\u7ba1\u7684\u5f00\u901a\u634c\u8017\u3002\u8fd9\u4e9b\u635f\u8017\u968f\u5f00\u5173\u9891\u7387\u7ebf\u6027\u589e\u52a0\u3002

\n 

\n  C.<\/strong> \u901a\u6001<\/strong>

\n  \u4e00\u4e14\u5f00\u901a\u8fc7\u7a0b\u7ed3\u675f\u3002\u4e8c\u6781\u7ba1\u5bfc\u901a\u6b63\u5411\u7535\u6d41lF<\/sub>\uff0cpn\u7ed3\u7684\u95e8\u9650\u7535\u538b\u548c\u534a\u5bfc\u4f53\u7684\u7535\u963b\u51b3\u5b9a\u6b63\u5411\u538b\u964dVF<\/sub>\u3002\u8fd9\u4e2a\u7535\u538b\u7531\u82af\u7247\u6e29\u5ea6\u3001\u6b63\u5411\u7535\u6d41IF<\/sub>\u548c\u5236\u9020\u5de5\u827a\u51b3\u5b9a\u3002

\n  \u5229\u7528\u6570\u636e\u624b\u518c\u4e2d\u7684VTO<\/sub>\u548crT<\/sub>\u53ef\u4ee5\u8ba1\u7b97\u6b63\u5411\u538b\u964d\u548c\u901a\u6001\u635f\u8017\u3002

\n  \u56fe3\u6240\u793a\u6b63\u5411\u538b\u964d\u7684\u7b80\u5316\u6a21\u578b\u662f\uff1a<\/span><\/p>\n

\n\tVF<\/sub>=rT<\/sub>·IF<\/sub>+VTO<\/sub><\/span><\/div>\n

\u76f8\u5e94\u7684\u901a\u6001\u635f\u8017\u662f\uff1a<\/span><\/p>\n

\n\t\"\u8ba1\u7b97\u516c\u5f0f\" <\/span><\/div>\n

  \u8ba1\u7b97\u51fa\u6765\u7684\u635f\u8017\u53ea\u662f\u8fd1\u4f3c\u503c\uff0c\u56e0\u4e3aVT<\/sub>O<\/sub>\u548crT<\/sub>\u968f\u6e29\u5ea6\u53d8\u5316\uff0c\u800c\u7ed9\u51fa\u7684\u53ea\u662f\u5728\u4e00\u5b9a\u6e29\u5ea6\u4e0b(TVJM<\/sub>\u7684\u53c2\u8003\u503c\u3002<\/span><\/p>\n

\n\t\"\u56fe3 <\/span><\/div>\n
\n\t\u56fe3 \u5178\u578b\u7684\u6b63\u5411\u538b\u964dVF<\/sub>\u4e0e\u5176\u7b80\u5316\u6a21\u578bVTO<\/sub>+IF<\/sub>·rT<\/sub>\u7684\u5173\u7cfb<\/span><\/div>\n

 

\n  D<\/strong>. <\/strong>\u5173\u65ad<\/strong>

\n  \u4e0e\u901a\u6001\u7279\u6027\u4e0d\u540c\uff0c\u9ad8\u9891\u5e94\u7528\u65f6\u4e8c\u6781\u7ba1\u7684\u9009\u62e9\u662f\u5426\u5408\u9002\u4e3b\u8981\u53d6\u51b3\u4e8e\u5173\u65ad\u7279\u6027\u7684\u53c2\u6570\uff0c\u4e09\u6781\u7ba1\u5f00\u901a\u65f6\uff0c\u7535\u6d41IF<\/sub>\u7684\u53d8\u5316\u7387\u7b49\u4e8e\u4e09\u6781\u7ba1\u7535\u6d41\u4e0a\u5347\u7387di\/dt\u3002\u5982\u679c\u4f7f\u7528MOSFET\u6216IGBT\uff0c\u5176-diF<\/sub>\/dt\u5f88\u5bb9\u6613\u8d85\u8fc71000A\/μs\u3002\u524d\u9762\u63d0\u5230\uff0c\u4e8c\u6781\u7ba1\u6062\u590d\u963b\u65ad\u80fd\u529b\u524d\u5fc5\u987b\u53bb\u9664\u901a\u6001\u65f6\u5b58\u50a8\u5728pn\u7ed3\u7684\u8f7d\u6d41\u5b50\u3002\u8fd9\u5c31\u4f1a\u4ea7\u751f\u53cd\u5411\u6062\u590d\u7535\u6d41\uff0c\u5176\u6ce2\u5f62\u53d6\u51b3\u4e8e\u82af\u7247\u6e29\u5ea6\u3001\u6b63\u5411\u7535\u6d41IF<\/sub>\uff0c-diF<\/sub>\/dt\u548c\u5236\u9020\u5de5\u827a\u3002

\n  \u56fe4\u662f\u6b63\u5411\u7279\u6027\u76f8\u540c\u7684\u91d1\u63ba\u6742\u548c\u94c2\u63ba\u6742\u5916\u5ef6\u578b\u4e8c\u6781\u7ba1\u4e0d\u540c\u6e29\u5ea6\u4e0b\u7684\u53cd\u5411\u6062\u590d\u7535\u6d41\u3002<\/span>
<\/p>\n\n\n\n\n
\n\t\t\t\t\"\u91d1\u63ba\u6742\u4e8c\u6781\u7ba1\" <\/span><\/td>\n\n\t\t\t\t\"\u94c2\u63ba\u6742\u4e8c\u6781\u7ba1\" <\/span><\/td>\n<\/tr>\n
\n\t\t\t\t\u56fe4 \u5728TVJ<\/sub>=25\u2103\u548c125\u2103\u65f6\u4e24FRED\u4e8c\u6781\u7ba1\u7684\u53cd\u5411\u6062\u590d\u7535\u6d41\u548c\u7535\u538b<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 

\n  \u76f8\u540c\u6e29\u5ea6\u4e0b\u4e0d\u540c\u5236\u9020\u5de5\u827a\u7684\u4e8c\u6781\u7ba1\u7684\u53cd\u5411\u6062\u590d\u7279\u6027\u660e\u663e\u4e0d\u540c\u3002

\n  \u94c2\u63ba\u6742\u4e8c\u6781\u7ba1\u53cd\u5411\u6062\u590d\u7535\u6d41\u7684\u51cf\u5c0f\u901f\u5ea6\u5f88\u5feb(\u56fe5(b))\uff0c\u53ef\u63a7\u5c11\u6570\u8f7d\u6d41\u5b50\u7684\u91d1\u63ba\u6742\u4e8c\u6781\u7ba1\u7684\u6062\u590d\u7279\u6027\u8f83\u8f6f(\u56fe5(a))\u3002

\n  \u6062\u590d\u7535\u6d41\u51cf\u5c0f\u5f97\u5f88\u5feb\uff0c\u7ebf\u8def\u4e2d\u5206\u5e03\u7535\u611f\u5bfc\u81f4\u7684\u7535\u538b\u5c16\u5cf0\u8d8a\u9ad8\u3002\u5982\u679c\u6700\u5927\u7535\u538b\u8d85\u8fc7\u4e09\u6781\u7ba1\u7684\u8010\u538b\u503c\uff0c\u5c31\u5fc5\u987b\u4f7f\u7528\u5438\u6536\u7535\u8def\u4ee5\u4fdd\u969c\u8bbe\u5907\u7684\u5b89\u5168\u5de5\u4f5c\u3002\u800c\u4e14\u8fc7\u9ad8\u7684du\/dt\u4f1a\u5bfc\u81f4EMI\/RFI\u95ee\u9898\uff0c\u5728RFI\u53d7\u9650\u7684\u5730\u65b9\u8981\u4f7f\u7528\u590d\u6742\u7684\u5c4f\u853d\u3002<\/span>
<\/p>\n\n\n\n\n
\n\t\t\t\t\"\u91d1\u63ba\u6742\u4e8c\u6781\u7ba1 <\/span><\/td>\n\n\t\t\t\t\"\u94c2\u63ba\u6742\u4e8c\u6781\u7ba1 <\/span><\/td>\n<\/tr>\n
\n\t\t\t\t\u56fe5 \u5728TJ<\/sub>=125\u2103\u65f6\u4e0d\u540c-diF<\/sub>\/dt\u7684\u53cd\u5411\u6062\u590d\u7535\u6d41<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 

\n  \u4e8c\u6781\u7ba1\u7684\u53cd\u5411\u6062\u590d\u7535\u6d41\u4e0d\u4ec5\u4f1a\u589e\u52a0\u4e8c\u6781\u7ba1\u7684\u5173\u65ad\u635f\u8017\u3002\u8fd8\u4f1a\u589e\u52a0\u4e09\u6781\u7ba1\u7684\u5f00\u901a\u635f\u8017\uff0c\u56e0\u4e3a\u5b83\u4e5f\u662f\u4e8c\u6781\u7ba1\u7684\u53cd\u5411\u7535\u6d41\u3002\u56fe6(a)\u548c(b)\u8868\u660e\u4e09\u6781\u7ba1\u5f00\u901a\u7535\u6d41\u662f\u7535\u611f\u7535\u6d41\u52a0\u4e0a\u4e8c\u6781\u7ba1\u7684\u53cd\u5411\u6062\u590d\u7535\u6d41\uff0c\u800c\u4e14\u5f00\u901a\u65f6\u95f4\u53d7trr\u5f71\u54cd\u4f1a\u589e\u5927\u3002

\n  \u56fe6(a)\u548c(b)\u91cd\u70b9\u8bf4\u660e\u8f6f\u6062\u590d\u7279\u6027\u65f6\u4f4e\u6062\u590d\u7535\u6d41\u7684\u597d\u5904\u3002\u9996\u5148\uff0c\u8f6f\u6062\u590d\u7279\u6027\u7684\u91d1\u63ba\u6742\u4e8c\u6781\u7ba1\u7684\u7535\u538b\u5c16\u5cf0\u8f83\u5c0f\u548c\u53cd\u5411\u6062\u590d\u7535\u6d41\u8f83\u5c0f\u3002\u56e0\u6b64\u4e8c\u6781\u7ba1\u6709\u4f4e\u5173\u65ad\u635f\u8017\u3002\u5176\u6b21\uff0c\u4f4e\u53cd\u5411\u6062\u590d\u7535\u6d41\u53ef\u51cf\u5c0f\u4e09\u6781\u7ba1\u7684\u5f00\u901a\u635f\u8017\u3002\u56e0\u6b64\uff0c\u4e8c\u6781\u7ba1\u7684\u9009\u62e9\u76f4\u63a5\u51b3\u5b9a\u4e86\u4e24\u4e2a\u5668\u4ef6\u7684\u529f\u7387\u635f\u8017\u3002<\/span>
<\/p>\n\n\n\n\n
\n\t\t\t\t\"\u7eed\u6d41\u4e8c\u6781\u7ba1\u7684\u53cd\u5411\u6062\u590d\u6ce2\u5f62\" <\/span><\/td>\n\n\t\t\t\t\"\u8868\u793a\u53cd\u5411\u6062\u590d\u7535\u6d41\u5f71\u54cd\u7684\u4e09\u6781\u7ba1\u7684\u7535\u6d41\u548c\u7535\u538b\u6ce2\u5f62\" <\/span><\/td>\n<\/tr>\n
\n\t\t\t\t\u56fe6 \u8868\u793a\u53cd\u5411\u6062\u590d\u7535\u6d41\u5f71\u54cd\u7684\u4e09\u6781\u7ba1\u7684\u7535\u6d41\u548c\u7535\u538b\u6ce2\u5f62<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

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