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让开关电æºå˜åŽ‹å™¨è¿œç¦»æ‰€å—的干扰</h3>
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<p>其实ï¼?strong><a href="http://www.chenfeipower.com/product/">开关电æºå˜åŽ‹å™¨</a></strong>它å¯ä»¥ç»è¿‡ç£åœºã€ç”µç£æ„Ÿåº”以åŠç”µè·¯å¯¹æ”¾å¤§å™¨æž„æˆå¹²æ‰°ï¼Œæ˜¯æ‰©éŸ³å™¨ä¸æœ€å¤§çš„干扰æºã€‚所以，è¦å¤„ç†å¥½å®ƒçš„作业状况和è¿ç”¨çŽ¯å¢ƒï¼Œæ‰å¹²æœ‰ç”¨åœ°é˜²æ¢ç”±ç”µæºå˜åŽ‹å™¨å‘生的打扰，使扩音器得到优质的音效。下é¢åšä¸€ä¸‹è®¨è®ºã€?/p>
<p>　　1ã€å½“å˜åŽ‹å™¨åˆçº§é˜»æŠ—ç‰äºŽæºç”µé˜»åŒè´Ÿè½½çš„å射电阻的并è”值时，将呈现低频截æ¢ï¼Œå¢žå¤§æºäºŽå˜åŽ‹å™¨çš„噪声，所以电æºå˜åŽ‹å™¨ä¹Ÿå¿…须有满足的电感。但这并ä¸èƒ½æˆä¸ºç›²ç›®åŠ 大å˜åŽ‹å™¨è¾“出功率的ç†ç”±ã€‚由于，å˜åŽ‹å™¨åˆçº§ç”µæ„Ÿæ˜¯éšé“芯ç£é€šå¯†åº¦è€Œæ”¹å˜çš„，次级负载功率å°æ—¶ï¼Œé“芯ç£é€šå¯†åº¦ä¹Ÿä¼šå‡å°ï¼Œä½¿ç”µæ„Ÿé™ä½Žã€‚通常，电æºå˜åŽ‹å™¨çš„功率å¯åœ¨æ¬¡çº§ä¾›ç”µåŠŸçŽ‡çš„1.4—2å€ä¹‹é—´æŒ‘选，对比æ°å½“ã€?/p>
<p>　　2ã€ç”±ç”µæºå˜åŽ‹å™¨å‘生的ç£åœºæ…扰一直是困惑放大器质é‡è¿›æ¥çš„疑问，å³ä¾¿æœ‰çº¯æ´çš„电æºï¼Œæ¥è‡ªå®ƒçš„ç£åœºæ„Ÿåº”也能形æˆæ”¾å¤§å™¨è´¨é‡ä¸¥å³»é™ä½Žã€‚由于ç£å±è”½é˜»éš”罩报价昂æ‰?乃至高过了å˜åŽ‹å™¨è‡ªèº«ï¼Œè¿™ä¹Ÿæ˜¯ä¸€äº›è¿›å£å˜åŽ‹å™¨æŠ¥ä»·å±…高的缘ç”?，通常的国产机器很少è¿ç”¨ç£å±è”½é˜»éš”ç½©å µæˆªå˜åŽ‹å™¨çš„ç£æ…扰，许多仅仅选用简略的é“皮罩阻隔，乃至爽性将å˜åŽ‹å™¨æš´éœ²è£…置，所以就ä¸èƒ½è¿›è¡Œæœ‰ç”¨çš„ç£å±è”½ã€‚国外优质的å˜åŽ‹å™¨å¸¸é€‰ç”¨å¤šå±‚锰游åˆé‡‘和粗铜层相间的布局，把å˜åŽ‹å™¨åŒ…å›´èµ·æ¥ï¼Œä¸€æ–¹é¢ä½¿ç”¨é”°æ¸¸åˆé‡‘高电阻ã€é«˜ç£å¯¼çš„特性进行ç£çŸè·¯ï¼Œå¦ä¸€æ–¹é¢ç»è¿‡é“œå±‚内导致的涡æµå‘生一个与æ…扰ç£åœºç›¸åçš„ç£åœºæŠµæ¶ˆç£æ…æ‰°ï¼Œå› è€Œæžå¤§çš„é™ä½Žäº†å˜åŽ‹å™¨çš„ç£åœºå¤–泄。业余æ¡ä»¶ä¸‹æ˜¯å¾ˆéš¾å¾—到锰游åˆé‡‘罩的，但也å¯ç”¨1.5毫米的软é“æ¿å’Œé“œæ¿åˆ¶æˆå¤šå±‚布局的ç£å±è”½ç½©ã€?/p>
<p>　　3ã€ç”µæºå˜åŽ‹å™¨é™¤äº†ä¸ºæ”¾å¤§å™¨ä¾›ç”µå¤–，还å¯ä»¥å°†æ”¾å¤§å™¨ä¸Žç”µæºå·§åˆèµ·æ¥ï¼Œä½¿ç”µç½‘ä¸çš„æ…扰æºè¿›å…¥æ”¾å¤§å™¨ï¼Œä¸€èµ·ä¹Ÿå°†æ”¾å¤§å™¨å‘生的电压ã€ç”µæµæ”¹å˜å射到电网ä¸ã€‚ä¸ºäº†å µæˆªç»•ç»„é—´çš„é™ç”µåœºåŠå®¹æ€§å·§åˆï¼Œé˜»éš”和共模按æºç”±æ¤å‘生的æ…扰，防æ¢å°†ç”µç½‘或电路ä¸çš„共模电压巧åˆåˆ°æ¬¡çº§æˆ–åˆçº§ä¸åŽ»ï¼Œå¯¹éŸ³å“用电æºå˜åŽ‹å™¨çš„ç»•ç»„åŠ æ³•æ‹‰ç¬¬é™ç”µå±è”½æ˜¯å¾ˆè¦å®³çš„。这ç§å±è”½å¯æ‰€ä»¥å±‚间替æ¢çš„铜箔，也å¯æ‰€ä»¥å®Œå¥½çš„åˆçŠ¶å¸ƒå±€ï¼Œæ€»å½’对绕ç»?尤其是对åˆçº§çš„绕ç»?包围得越多，共模按æºè¶Šå¥½ã€?/p>
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