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<p> <span style="font-size: 16px">开关电æºå˜åŽ‹å™¨å®ƒè·Ÿä¸€èˆ¬çš„å™¨ä»¶æ˜¯ä¸€æ ·çš„ï¼Œåœ¨åº”æ€¥å·¥ä½œçš„æ—¶å€™èƒ½å¤Ÿå°†å¤šä¸ªå˜åŽ‹å™¨åœ¨ä¸€å®šçš„æ¡ä»¶ä¸‹è¿›è¡Œä¸²è”使用。å˜åŽ‹å™¨åŠŸçŽ‡æ»¡è¶³è¦æ±‚的时候，而没有åˆé€‚的电压的è¯ã€‚å¯ä»¥å°†ä¸¤ä¸ªæˆ–者是多个å˜åŽ‹å™¨ä¸²è”使用。倘若在电压满足的æ¡ä»¶ä¸‹ï¼Œä½†æ˜¯å˜åŽ‹å™¨çš„功率åˆä¸å¤Ÿæ—¶ï¼Œä¹Ÿå¯ä»¥å°†ä¸¤ä¸ªæˆ–者是多个å˜åŽ‹å™¨å¹¶è”使用，以满足电路供电è¦æ±‚ã€?/span></p>
<p> </p>
<p><span style="font-size: 16px">　　</span><strong><a href="http://www.chenfeipower.com/product/"><span style="font-size: 16px">开关电æºå˜åŽ‹å™¨</span></a></strong><span style="font-size: 16px">是由电感线圈构æˆçš„，所以完全éµå¾ªç”µæ„Ÿå™¨çš„è¿ç®—规则，å¯ä»¥æŠŠç”µæºå˜åŽ‹å™¨åˆçº§ä¸²è”，也å¯ä»¥åœ¨è¾“出的次级串è”，现将四ç§æƒ…况分别介ç»å¦‚下：</span></p>
<p> </p>
<p><span style="font-size: 16px">　　1.电æºå˜åŽ‹å™¨çš„次级串è”ã€?电æºå˜åŽ‹å™¨çš„次级串è”是在å•ä¸ªåŠŸçŽ‡æ»¡è¶³æƒ…况ä¸?而次级输出电压ä¸æ»¡è¶³æ—¶å°†ä¸¤ä¸ªæˆ–多个å˜åŽ‹å™¨çš„组åˆã€‚如两个å˜åŽ‹å™¨çš„åˆçº§è¾“å…¥ä¸?20V,次级输出ä¸?8Væ—?如è¦ç»™è´Ÿè½½ä¾›33V电压,则å¯ä»¥å°†ä¸¤ä¸ªå˜åŽ‹å™¨çš„次级串è”èµ·æ¥åº”用。电æºå˜åŽ‹å™¨çš„次级串è”也是很容易çš?ä¸åŒçš„次级输出åªè¦ä¿è¯å•ä¸ªå˜åŽ‹å™¨åŠŸçŽ‡çš„æ¡ä»¶ä¸‹ä¹Ÿæ˜¯å¯ä»¥å°†å…¶æ¬¡çº§ä¸²è”应用的。在ç†æƒ³çŠ¶å†µä¸‹å¤šä¸ªå˜åŽ‹å™¨çš„åˆçº§è¾“入电压相åŒæ—¶,总输出计算å¼ä¸ºï¼šVæ€?Våˆå•/(V1æ¬?V2æ¬?……Vnæ¬?ã€?/span></p>
<p> </p>
<p><span style="font-size: 16px">　　2.å˜åŽ‹å™¨çš„åˆçº§å¹¶è”。这ç§æƒ…况是我们生活ä¸å¸¸è§çš„实例,多个ä¸åŒä¾›ç”µçš„è€å¼å½©ç”µä¸çš„é¥æŽ§å˜åŽ‹å™¨å’Œä¸»å˜åŽ‹å™¨(电æºå¼€å…³å˜åŽ‹å™¨)å‡å±žäºŽå˜åŽ‹å™¨åˆçº§çš„并è”ã€?/span></p>
<p> </p>
<p><span style="font-size: 16px">　　3.å˜åŽ‹å™¨çš„次级并è”。电æºå˜åŽ‹å™¨çš„次级并è”是在å•ä¸ªå˜åŽ‹å™¨æ¬¡çº§è¾“出电压相åŒè€Œå•ä¸ªåŠŸçŽ‡ä¸èƒ½æ»¡è¶³çš„情况下的应用。其应用是将多个å˜åŽ‹å™¨çš„次级电æµå åŠ ,以满足负载的功率需è¦ã€‚电æºå˜åŽ‹å™¨çš„次级并è?å¯ä½¿è¾“出功率为多个å˜åŽ‹å™¨åŠŸçŽ‡ä¹‹å’Œã€‚电æºå˜åŽ‹å™¨çš„串并è”应用是ä¸åˆ†çº¿æ€§ç”µæºç”µè·¯å’Œç”µè·¯çš„。在以å‰çš„线性电æºç”µè·¯ä¸,次级串è”的应用实例更多些,比如电视机ä¸çš„行逆程å˜åŽ‹å™?就是è¿ç”¨äº†å˜åŽ‹å™¨æ¬¡çº§çš„串è”。现在的大功率开关电æºä¸,次级并è”的应用è¦å¤šäº›,如上百瓦的开关电æºä¸å¸¸å°†å˜åŽ‹å™¨çš„次级并è”,以增大功率。电æºå˜åŽ‹å™¨çš„串并è”应用时è¦æ³¨æ„ä»¥ä¸‹å‡ ç‚¹ï¼?/span></p>
<p> </p>
<p><span style="font-size: 16px">　　(1)电æºå˜åŽ‹å™¨åœ¨ä¸²å¹¶è”æ—¶è¦æ³¨æ„å˜åŽ‹å™¨çš„åŒå端,串è”应用时è¦é¡ºä¸²è€Œä¸èƒ½åä¸?并è”使用时è¦åŒå端与åŒå端相å¹?å¦åˆ™å°±ä¼šçƒ§æ¯å˜åŽ‹å™¨ã€?/span></p>
<p> </p>
<p><span style="font-size: 16px">　　(2)以上计算åªæ˜¯ç†æƒ³ç®—法,而实际上在它们串并è”åŽçš„å•ä¸ªå˜åŽ‹å™¨æŸè€—是éžå¸¸å¤§çš„。æ¯ä¸ªç”µæºå˜åŽ‹å™¨çš„次级输出电压会比上å¼è®¡ç®—结果低的ã€?/span></p>
<p> </p>
<p><span style="font-size: 16px">　　(3)ä¸åŒæ¬?/span><span style="font-size: 16px">级输å‡?如è¦å¹¶è”使用,最好在稳压åŽè¿›è¡?且并è”电压是å–å˜åŽ‹å™¨è¾“出ä¸æœ€ä½Žçš„电压值。次级串è”应用时,å¯ä»¥æ˜¯æ¬¡çº§ç›´æŽ¥ä¸²è?也å¯ä»¥åœ¨ç¨³åŽ‹åŽå†ä¸²è”ã€?/span></p>
<p> </p>
<p><span style="font-size: 16px">　　(4)电æºç”µè·¯ä¸çš„共地是必须的。åªæœ‰åœ¨ä¸€ä¸ªå‚考点的æ¡ä»¶ä¸‹æ‰èƒ½è¿›è¡Œç”µä½æ¯”较和电压计算ã€?/span></p>
<p> </p>
<p><span style="font-size: 16px">　　4.电æºå˜åŽ‹å™¨çš„åˆçº§ä¸²è”。在å˜åŽ‹å™¨è®¡ç®—å¼ä¸æœ‰ä¸€ä¸ªå¸¸æ•°N称为åŒæ•°æ¯?它是åˆçº§åŒæ•°ä¸Žæ¬¡çº§åŒæ•°ä¹‹æ¯?åˆæ¬¡çº§ç”µåŽ‹æ¯”关系为N,而åˆæ¬¡çº§ç”µæµæ¯”关系为1/N。而这ç§æƒ…况是在å•ä¸ªå˜åŽ‹å™¨çš„次级电压高于æˆå€ç”¨ç”µå™¨ç”µæºä½¿ç”¨æƒ…况ä¸?å¯ä»¥å°†ä¸¤ä¸ªæˆ–多个å˜åŽ‹å™¨åˆçº§ä¸²è”使用。而如å†å°†ä¸¤ä¸ªæ¬¡çº§ä¸²è”就没有多大使用价值了。在æ¤æƒ…况下,åªè¦ä¿è¯å•ä¸ªå˜åŽ‹å™¨çš„功率è¦æ±‚,则次级输出电压ä¸ä¸€å®šç›¸å?它的输出电压计算为：Vå?(V1æ¬?V2æ¬?……Vnæ¬?/Vnã€?/span></p>
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