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</script> <script type="text/javascript"> var OBJ_TITLE = "导致高频å˜åŽ‹å™¨åç£çš„原因有哪äº?"; var OBJ_ID = "222"; var MARK = "news"; var ARR_AD_MARK = ["news_detail_1", "news_detail_2", "news_detail_3"]; var SID = "0001,0002,0006"; //æƒé™ID var AUTHORITY_ID = ""; </script> <script src="/JS/Cls_jsPage.js"></script> <!--content:start--> <div class="content"> <div class="plc2"> 当å‰ä½ç½®ï¼?a href="/">首页</a> » <a href="/news/">资讯中心</a> » <a href="/News/News-0001,0002,0006.shtml"> 晨飞资讯</a> » <a href="/Article/helps-42131446321_1.html">导致高频å˜åŽ‹å™¨åç£çš„原因有哪äº?</a></div> <div class="list4nr"> <div class="n_info_con" id="printableview"> <h3> 导致高频å˜åŽ‹å™¨åç£çš„原因有哪äº?</h3> <div class="info_con_tit"> <div class="info_con_tit"> <div class="n_tit"> <span>文章出处ï¼?a href=""><a href="http://cfdz.nsw888.com">深圳市晨飞电å­æœ‰é™å…¬å?/a></a></span><span>网责任编辑：<a href="http://cfdz.nsw888.com">NSW</a></span><span>作者：<a href="http://cfdz.nsw888.com">NSW</a></span><span>人气ï¼?span id="cntrHits">-</span></span><span>å‘表时间ï¼?013-06-09 14:45:00</span> <div class="newchang"> <!-- JiaThis Button BEGIN --> <div id="ckepop"> <a href="http://www.jiathis.com/share/?uid=899792" class="jiathis jiathis_txt jtico jtico_jiathis" target="_blank">分享到：</a> <a class="jiathis_button_qzone">QQ空间</a> <a class="jiathis_button_tsina"> 新浪微åš</a> <a class="jiathis_button_tqq">腾讯微åš</a> <a class="jiathis_button_tsohu">æœç‹å¾®åš</a> <a class="jiathis_button_t163">网易微åš</a> <a class="jiathis_button_tools_1"></a><a class="jiathis_button_tools_2"></a> </div> <script type="text/javascript"> var jiathis_config = { "data_track_clickback": true };</script> <script type="text/javascript" src="http://v2.jiathis.com/code/jia.js?uid=899792" charset="utf-8"></script> <!-- JiaThis Button END --> </div> </div> </div> </div> <div id="cntrBody"> <p>　　åœ?strong>高频å˜åŽ‹å™?/strong>的使用中普é存在这样一个问é¢?-åç£.åç£ä¸¥é‡æ—¶ä¼šå¯¼è‡´å˜åŽ‹å™¨ç£å¿ƒå•å‘饱和，致使原边绕组瞬时过æµï¼ŒæŸæ¯åŠŸçŽ‡å™¨ä»¶ã€‚å› æ­¤è¦é‡‡å–相应的åç£æŠ‘制措施æ¥ä¿è¯å˜åŽ‹å™¨å¤„于对称平衡è¿è¡ŒçŠ¶æ€ã€‚在实际应用中导致高频å˜åŽ‹å™¨åç£çš„原因主è¦æœ‰ä»¥ä¸‹å‡ ç§ï¼?/p> <p>　　1.功率管中器件通æ€åŽ‹é™å­˜åœ¨å·®å¼‚。如å›?1 中开关管M1ã€M2 的压é™ä¸ç­‰ã€‚这将导致加在å˜åŽ‹å™¨åŽŸè¾¹ç»•ç»„上的电压波形正ã€è´Ÿå¹…值ä¸ç­‰ã€?/p> <p>　　2.两路驱动信å·ä¼ è¾“过程中的延迟ä¸åŒï¼ŒåŠŸçŽ‡å™¨ä»¶è‡ªèº«å¼€å…³é€Ÿåº¦ä¸Šå­˜åœ¨å·®å¼‚。这将导致å˜åŽ‹å™¨ç»•ç»„上的电压波形正ã€è´Ÿè„‰å®½ä¸ç­‰ã€?/p> <p>　　3.由滤波电感的滤波作用使两个二次侧绕组电æµæœ€å¤§å€¼å·®åˆ«è¾ƒå°ï¼Œæ¯ä¸ªäºŒæ¬¡ç»•ç»„与相应一次绕组的ç£åŠ¨åŠ¿å—到牵制。（æ¯ä¸ªäºŒæ¬¡ç»•ç»„ç£åŠ¨åŠ¿æŽ¥è¿‘于两个一次绕组ç£åŠ¨åŠ¿çš„å¹³å‡å€¼ï¼‰ã€?/p> <p>　　4.推挽电路的全部时间都被强制ç®ä½ï¼Œæ²¡æœ‰åƒå•ç«¯ç”µè·¯é‚£æ ·çš„负电压é¢ç§¯è‡ªåŠ¨å’Œæ­£ç”µåŽ‹é¢ç§¯ç›¸å¹³è¡¡çš„时间上和电压上的自由度ã€?/p> <p>　　以上四ç§åŽŸå› å¯¼è‡´åœ¨åŽŸè¾¹ç»•ç»„æ­£ã€å两个方å‘激励时，相应的ä¼ç§’é¢ç§¯ä¸ç›¸ç­‰ï¼Œæ­¤æ—¶å˜åŽ‹å™¨å¤„于ä¸å¹³è¡¡è¿è¡ŒçŠ¶æ€ï¼Œç£å¿ƒçš„工作ç£åŒ–曲线ä¸å†å¯¹äºŽåŽŸç‚¹å¯¹ç§°ã€‚由于å˜åŽ‹å™¨çš„原边等效电抗对直æµåˆ†é‡åªå‘ˆçŽ°ç”µé˜»ç‰¹æ€§ï¼Œè€ŒåŽŸè¾¹ç»•ç»„的内阻一般都很å°ï¼Œå› æ­¤åŽŸè¾¹ç”µåŽ‹ä¸­å¾ˆå°çš„ç›´æµåˆ†é‡å°±ä¼šåœ¨ç»•ç»„中形æˆå¾ˆå¤§çš„ç›´æµæ¿€ç£ç£åŠ¿ï¼Œè¯¥ç›´æµç£åŠ¿ä¸Žäº¤æµç£åŠ¿ä¸€èµ·å…±åŒä½œç”¨åœ¨å˜åŽ‹å™¨åŽŸè¾¹ç»•ç»„中，原边绕组电æµä¸å¹³è¡¡ï¼Œå°±ä¼šå¯¼è‡´å˜åŽ‹å™¨ç£å¿ƒçš„工作ç£åŒ–曲线产生å移，ä¸å†å¯¹äºŽåŽŸç‚¹å¯¹ç§°ï¼Œå³æ‰€è°“å˜åŽ‹å™¨ç£å¿ƒå‡ºçŽ°äº†åç£çŽ°è±¡ã€‚当åç£ä¸¥é‡åˆ°ä¸€å®šç¨‹åº¦ï¼Œç£å¿ƒå·¥ä½œå°†è¿›å…¥å•å‘饱和区，此时ç£å¿ƒçš„导ç£çŽ‡å°†æ€¥å‰§ä¸‹é™ï¼Œå˜åŽ‹å™¨åŽŸè¾¹ç­‰æ•ˆç”µæ„Ÿè¿…速å‡å°‘，回路电æµçž¬é—´ä¸Šå‡ï¼Œæœ€ç»ˆå¯¼è‡´åŠŸçŽ‡ç®¡çƒ§æ¯ã€?br />  </p> </div> <div class="apage" id="showfenye"> <!--资讯分页:start--> <script type="text/javascript"> var pagecont=1; 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