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mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"><strong><span style="font-size:12.0pt;font-family:宋体; mso-bidi-font-family:宋体;mso-font-kerning:0pt"><a href="http://www.chenfeipower.com">高频å˜åŽ‹å™?/a></span></strong><span style="font-size:12.0pt;font-family:宋体; mso-bidi-font-family:宋体;mso-font-kerning:0pt">的两ç§åŸºæœ¬ç»•法:顺åºç»•法和三明治绕法。顺åºç»•法一般的å•输出电æºï¼Œå˜åŽ‹å™¨åˆ†ä¸?span lang="EN-US">3</span>个绕组,åˆçº§ç»•组<span lang="EN-US">Np,</span>次级绕组<span lang="EN-US">Ns,</span>辅助电æºç»•组<span lang="EN-US">Nb</span>ï¼Œç»•åˆ¶çš„é¡ºåºæ˜¯ï¼š<span lang="EN-US">Np--Ns--Nb</span>。此ç§ç»•法工艺简å•,易于控制ç£èŠ¯çš„å„ç§å‚æ•°ï¼Œä¸€è‡´æ€§è¾ƒå¥½ï¼Œç»•çº¿æˆæœ¬ä½Žï¼Œé€‚用于大批é‡çš„ç”Ÿäº§ï¼Œä½†æ¼æ„Ÿç¨å¤§ï¼Œè€Œè€¦åˆç”µå®¹å°ï¼Œ<span lang="EN-US">EMI</span>æ¯”è¾ƒå¥½æ•…é€‚ç”¨äºŽå¯¹æ¼æ„Ÿä¸æ•感的å°åŠŸçŽ‡åœºåˆï¼Œä¸€èˆ¬åŠŸçŽ‡å°äº?span lang="EN-US">30~40W</span>的电æºä¸­æ™®é实用这ç§ç»•法ã€?/span></p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"> </p> <p style="margin-bottom: 12pt; text-align: center;" class="MsoNormal"><img width="316" height="316" title="ER40高频å˜åŽ‹å™¨ç«‹å¼? alt="ER40高频å˜åŽ‹å™¨ç«‹å¼? src="http://www.chenfeipower.com/UploadFiles/Product/20120703160354_67923.jpg" /></p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"> </p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"><span style="font-size:12.0pt;font-family:宋体; mso-bidi-font-family:宋体;mso-font-kerning:0pt">三明治绕法在电æºå˜åŽ‹å™¨çš„åˆ¶ä½œè¿‡ç¨‹ä¸­æ˜¯ä¸€ç§æ¯”较常è§çš„基础绕法。由于被夹在中间的绕组ä¸åŒï¼Œä¸‰æ˜Žæ²»åˆåˆ†ä¸ºä¸¤ç§ç»•法,å³åˆçº§å¤¹æ¬¡çº§ï¼Œæ¬¡çº§å¤¹åˆçº§ã€‚䏋颿ˆ‘们æ¥åˆ†åˆ«ä»‹ç»ã€?span lang="EN-US"><br /> <br /> </span>首先我们æ¥çœ‹ç¬¬ä¸€ç§å¸¸è§çš„高频电æºå˜åŽ‹å™¨ç»•æ³•ï¼Œå³åˆçº§å¤¹æ¬¡çº§çš„绕法。这ç§ç»•法在平时的实际æ“作过程中也被å«åšåˆçº§å¹³å‡ç»•法ï¼?<span lang="EN-US"><br /> </span>在使用这ç§åˆçº§å¹³å‡ç»•法进行电æºå˜åŽ‹å™¨çš„ç»•åˆ¶æ—¶ï¼Œå…¶å…·ä½“ç»•åˆ¶è¿‡ç¨‹å¦‚ä¸Šå›¾æ‰€å±•ç¤ºçš„æ ·å­ï¼Œæ“作顺åºä¸?span lang="EN-US">Np/2-Ns-Np/2-Nb</span>ã€?/span></p> <p align="left" style="margin-bottom:12.0pt;text-align:left; mso-pagination:widow-orphan" class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt; font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:0pt"><br /> </span><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体; mso-font-kerning:0pt">æŽ¥ä¸‹æ¥æˆ‘们æ¥çœ‹ä¸€ä¸‹é«˜é¢‘电æºå˜åŽ‹å™¨çš„ç¬¬äºŒç§ä¸‰æ˜Žæ²»ç»•法,次级夹åˆçº§çš„绕法。这一绕法有时候也被å«åšæ¬¡çº§å¹³å‡ç»•法,其绕制原ç†å›¾å¦‚下图图<span lang="EN-US">2</span>所示,当使用这一 绕制方法进行电æºå˜åŽ‹å™¨çš„ç»•åˆ¶æ—¶ï¼Œç»•åˆ¶é¡ºåºä¸?span lang="EN-US">Ns/2-Np-Ns/2-Nb</span>ã€‚å½“è¾“å‡ºæ˜¯ä½ŽåŽ‹å¤§ç”µæµæ—¶ï¼Œä¸€èˆ¬é‡‡ç”¨æ­¤ç§ç»•法居多ã€?/span></p> <p style="text-indent:21.0pt" class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning: 0pt">1</span><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family: 宋体;mso-font-kerning:0pt">ã€ä¸‰æ˜Žæ²»ç»•法å¯ä»¥å‡å°‘å˜åŽ‹å™¨çš„æ¼æ„Ÿï¼Œè€Œå‡å°‘æ¼æ„Ÿå¸¦æ¥çš„好处是电压尖峰会é™ä½Žï¼Œä½¿<span lang="EN-US">MOSFET</span>的电压应力é™ä½?/span></p> <p style="text-indent:21.0pt" class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning: 0pt">2</span><span style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family: 宋体;mso-font-kerning:0pt">ã€æ”¹å–?span lang="EN-US">EMI</span>:由<span lang="EN-US">MOSFET</span>与散热片引起的共模干扰电æµä¹Ÿå¯ä»¥é™ä½Žï¼Œä»Žè€Œæ”¹å–?span lang="EN-US">EMI;</span>由于在åˆçº§ä¸­é—´åŠ å…¥äº†ä¸€ä¸ªæ¬¡çº§ç»•ç»„ï¼Œæ‰€ä»¥å‡å°‘了å˜åދ噍åˆçº§çš„层间分布电容,而层间电容的å‡å°‘,就会使电路中的寄生振è¡å‡å°‘ï¼ŒåŒæ ·å¯ä»¥é™ä½?span lang="EN-US">MOSFET</span>与次级整æµç®¡çš„电压电æµåº”力,改善<span lang="EN-US">EMI</span>ã€?/span><span lang="EN-US" style="font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning: 0pt"><br type="_moz" /> </span></p> <p style="text-indent:21.0pt" class="MsoNormal"> </p> <p align="left" style="margin-bottom:12.0pt;text-align:left; 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