• 豆搜网 > EMI / EMC設計講座(三)傳導式EMI的測量技術
  • EMI / EMC設計講座(三)傳導式EMI的測量技術

    免费下载 下载此文档 文档格式:DOC   更新时间:2012-07-21   下载次数:0   点击次数:1

    EMI / EMC瑷▓璎涘骇锛堜笁锛夊偝灏庡紡EMI鐨勬脯閲忔妧琛?/span>

    浜庡渤銆屽偝灏庡紡锛坈onducted锛塃MI銆嶆槸鎸囬儴鍒嗙殑闆荤锛堝皠闋伙級鑳介噺閫忛亷澶栭儴绾滅窔锛坈able锛夈侀浕婧愮窔銆両/O浜掗d粙闈紝褰㈡垚銆屽偝灏庢尝锛坧docsou.comn wave锛夈嶈鍌抽佸嚭鍘汇傛湰鏂囧皣瑾槑灏勯牷鑳介噺缍撶敱闆绘簮绶氬偝閫佹檪锛屾墍鐢㈢敓鐨勩屽偝灏庡紡闆滆▕銆嶅皪PCB鐨勫奖闊匡紝浠ュ強濡備綍娓噺銆屽偝灏庡紡EMI銆嶅拰FCC銆丆ISPR鐨凟MI闄愬埗瑕忓畾銆?/span>

    宸ā鍜屽叡妯¢洔瑷?/span>銆屽偝灏庡紡EMI銆嶅彲浠ュ垎鎴愬叐椤烇細宸ā锛?/span>Differential mode锛?/span>DM锛夊拰鍏辨ā锛?/docsou.common mode锛?/docsou.com锛夈傚樊妯′篃绋变綔銆屽皪绋辨ā寮忥紙symmetric mode锛夈嶆垨銆屾甯告ā寮忥紙normal mode锛夈嶏紱鑰屽叡妯′篃绋变綔銆屼笉灏嶇ū妯″紡锛?/span>asymmetric mode锛夈嶆垨銆屾帴鍦版穿婕忔ā寮忥紙ground docsou.come mode锛夈嶃?/span>鐢?/span>EMI鐢㈢敓鐨勯洔瑷婁篃鍒嗘垚鍏╅锛氬樊妯¢洔瑷婂拰鍏辨ā闆滆▕銆傜啊瑷涔嬶紝宸ā闆滆▕鏄暥鍏╂闆绘簮渚涙噳绶氳矾鐨勯浕娴佹柟鍚戜簰鐐虹浉鍙嶆檪鐧肩敓鐨勶紝濡傚湒1(a)鎵绀恒傝屽叡妯¢洔瑷婃槸鐣舵墍鏈夌殑闆绘簮渚涙噳绶氳矾鐨勯浕娴佹柟鍚戠浉鍚屾檪鐧肩敓鐨勶紝濡傚湒1(b)鎵绀恒備竴鑸岃█锛屽樊妯¤▕铏熼氬父鏄垜鍊戞墍瑕佺殑锛屽洜鐐哄畠鑳芥壙杓夋湁鐢ㄧ殑璩囨枡鎴栬▕铏燂紱鑰屽叡妯¤▕铏燂紙闆滆▕锛夋槸鎴戝戜笉瑕佺殑鍓綔鐢ㄦ垨鏄樊妯¢浕璺殑銆屽壇鐢㈠搧銆嶏紝瀹冩鏄?/span>EMC鐨勬渶澶ч洠椤屻傚緸鍦栦竴涓紝鍙互娓呮鐧肩従锛屽叡妯¢洔瑷婄殑鐧肩敓澶у鏁告槸鍥犵偤銆岄洔鏁i浕瀹癸紙stray docsou.comitor锛夈嶇殑涓嶇暥鎺ュ湴鎵閫犳垚鐨勩傞欎篃鏄偤浣曞叡妯′篃绋变綔銆屾帴鍦版穿婕忔ā寮忋嶇殑鍘熷洜銆?/span>鍦ㄥ湒浜屼腑锛?/span>L鏄屾湁浣滅敤锛?/docsou.comve锛夈嶆垨銆岀浉浣嶏紙docsou.com锛夈嶇殑鎰忔濓紝N鏄屼腑鎬э紙Neutral锛夈嶇殑鎰忔濓紝E鏄屽畨鍏ㄦ帴鍦版垨鎺ュ湴绶氾紙Earth wire锛夈嶇殑鎰忔濓紱EUT鏄屾脯瑭︿腑鐨勮ō鍌欙紙Equipment Under Test锛夈嶄箣鎰忔濄傚湪E涓嬫柟锛屾湁涓鍊嬫帴鍦扮铏燂紝瀹冩槸鎺$敤銆屽湅闅涢浕宸ュ鍝℃渻锛?/docsou.comdocsou.comnal docsou.comdocsou.comn锛?/span>IEC锛夈嶆墍瀹氱京鐨勩屾湁淇濊鐨勬帴鍦帮紙Protective Earth锛夈嶄箣绗﹁櫉锛堝湪鎺ュ湴绶氱殑鍥涢辨湁涓鍊嬪湏褰級锛岃屼笖鏈夋檪鏈冧互銆?/span>PE銆嶄締瑷绘槑銆?/span>DM闆滆▕婧愭槸閫忛亷L鍜?/span>N灏嶅伓绶氾紝渚嗘帹鎸斤紙push and pull锛夐浕娴?/span>Idm銆傚洜鐐烘湁DM闆滆▕婧愮殑瀛樺湪锛屾墍浠ユ矑鏈夐浕娴侀氶亷鎺ュ湴绶氳矾銆傞洔瑷婄殑闆绘祦鏂瑰悜鏄牴鎿氫氦娴侀浕鐨勯辨湡鑰岃畩鍖栫殑銆?

    闆绘簮渚涙噳闆昏矾鎵鎻愪緵鐨勫熀鏈殑浜ゆ祦宸ヤ綔闆绘祦锛屽湪鏈唱涓婁篃鏄樊妯$殑銆傚洜鐐哄畠娴侀?/span>L鎴?/span>N绶氳矾锛屼甫閫忛亷L鎴?/span>N绶氳矾闆㈤枊銆備笉閬庯紝鍦ㄥ湒浜屼腑鐨勫樊妯¢浕娴佷甫娌掓湁鍖呭惈閫欏嬮浕娴併傞欐槸鍥犵偤宸ヤ綔闆绘祦闆栫劧鏄樊妯$殑锛屼絾瀹冧笉鏄洔瑷娿傚彟涓鏂归潰锛屽皪涓鍊嬮浕娴佹簮锛堣▕铏熸簮锛夎岃█锛岃嫢瀹冪殑鍩烘湰闋荤巼鏄浕婧愰牷鐜囷紙docsou.comequency锛夌殑鍏╁?/span>----100鎴?/span>120Hz锛屽畠瀵﹁唱涓婁粛鏄爆鏂笺岀洿娴佺殑銆嶏紝鑰屼笖涓嶆槸闆滆▕锛涘嵆浣垮畠鐨勮娉㈤牷鐜囷紝瓒呴亷浜嗘婧栫殑鍌冲皫寮?/span>EMI涔嬮檺鍒剁瘎鍦嶏紙150 kHz to 30 MHz锛夈傜劧鑰岋紝蹇呴爤娉ㄦ剰鐨勬槸锛屽伐浣滈浕娴佷粛鐒朵繚鐣欐湁鐩存祦鍋忓鐨勮兘閲忥紝姝ゅ亸澹撴槸鎻愪緵绲︽烤娉㈡姉娴佺窔鍦堬紙filter choke锛変娇鐢紝鍥犳閫欐渻鍤撮噸褰遍熆EMI婵炬尝鍣ㄧ殑鏁堣兘銆傞欐檪锛岀暥浣跨敤澶栭儴鐨勯浕娴佹帰閲濅締閲忔脯鏁告摎鏅傦紝寰堝彲鑳藉洜姝ら犳垚娓噺瑾ゅ樊銆?/span>

    CM闆滆▕婧愭湁鎺ュ湴锛岃屼笖L鍜?/span>N绶氳矾鍏锋湁鐩稿悓鐨勯樆鎶?/span>Z銆傚洜姝わ紝瀹冮﹨鍕曠浉鍚屽ぇ灏忕殑闆昏矾閫氶亷L鍜?/span>N绶氳矾銆備笉閬庯紝閫欐槸鍋囪ō鍏╄呯殑闃绘姉澶у皬鐩哥瓑銆傚彲浠ユ竻妤氬湴瑙瀵熷嚭锛屽亣浣块洐鏂圭殑闃绘姉涓嶅潎琛★紙docsou.comnced锛夛紝銆屼笉灏嶇ū鐨勩嶅叡妯¢浕娴佸皣鍒嗕綀鍦?/span>L鍜?/span>N绶氳矾涓娿傞欎技涔庢槸銆岀敤瑭炰笉鐣躲嶆垨鑸囧師瀹氱京涓嶇锛屽洜鐐?/docsou.com鏈締鍙堢ū浣溿屼笉灏嶇ū妯″紡銆嶃傜偤浜嗛伩鍏嶆贩娣嗭紝姝ゆ檪鐨勬ā寮忔噳瑭茬ū浣溿岄潪灏嶇ū锛?/span>nonsymmetric锛夋ā寮忋嶏紝濂藉拰銆屼笉灏嶇ū妯″紡銆嶅仛鍗鍒嗐傚湪澶у鏁哥殑闆绘簮渚涙噳闆昏矾涓紝鍦ㄩ欏嬫ā寮忎笅鎵鐧煎嚭鐨?/span>EMI鏄渶澶氱殑銆?/span> 

    下一页

  • 下载地址 (推荐使用迅雷下载地址,速度快,支持断点续传)
  • 免费下载 DOC格式下载