鎶€琛撻牷閬�

濞撳〒宸ユキ(y猫)
鎮ㄧ従(xi脿n)鍦ㄧ殑浣嶇疆锛� 涓湅鍌冲嫊缍�(w菐ng) > 鎶€琛撻牷閬� > 鎶€琛撶櫨绉� > 涓€绋柊鍨嬬殑骞惰伅(li谩n)闁嬮棞闆绘簮鐨勫潎娴佹柟娉�

涓€绋柊鍨嬬殑骞惰伅(li谩n)闁嬮棞闆绘簮鐨勫潎娴佹柟娉�

鏅傞枔锛�2008-11-19 13:49:00渚嗘簮锛歠enghy

灏庤獮锛�?鏈枃鎻愬嚭浜嗕竴绋柊鍨嬬殑銆佹柟渚跨殑銆佺劇鎼嶇殑闆绘祦閲囨ǎ鏂规硶锛屽苟鍦ㄩ€欑ó闆绘祦妾㈡脯鏂规硶鐨勫熀绀庝笂瀵︾従(xi脿n)浜嗗苟鑱�(li谩n)绯荤当(t菕ng)鐨勫潎娴�銆�
鍦ㄥぇ鍔熺巼DC/DC闁嬮棞闆绘簮涓�,鐐轰簡鐛插緱鏇村ぇ鐨勫姛鐜�锛岀壒鍒ユ槸鐐轰簡寰楀埌澶ч浕娴佹檪锛岀稉(j墨ng)甯搁噰鐢∟鍊嬪柈鍏冨苟鑱�(li谩n)鐨勬柟娉�銆傚鍊嬪柈鍏冨苟鑱�(li谩n)鍏锋湁楂樺彲闈犳€�锛屽苟鑳藉鐝�(xi脿n)闆昏矾妯″妯欐簴鍖栫瓑鍎�(y艒u)榛�銆傜劧鑰屽湪骞惰伅(li谩n)涓亣鍒扮殑涓昏鍟忛灏辨槸闆绘祦涓嶅潎锛岀壒鍒ュ湪鍔犻噸璨犺級鏅傦紝鏈冨紩璧疯純鐐哄毚閲嶇殑鍚庢灉銆傛櫘閫氱殑鍧囨祦鏂规硶鏄噰鍙栫崹绔嬬殑PWM鎺у埗鍣ㄧ殑鍚勫€嬫ā濉�锛岄€氶亷闆绘祦閲囨ǎ鍙嶉鍒癙WM鎺у埗鍣ㄧ殑寮曡叧FB鎴栬€呭紩鑵矯OMP锛屽嵆鍙嶉閬嬫斁鐨勮几鍏ユ垨鑰呰几鍑鸿叧渚嗚(di脿o)绡€(ji茅)杓稿嚭闆诲锛屽緸鑰岄仈鍒板潎娴佺殑鐩殑銆傞’鐒讹紝闆绘祦閲囨ǎ鏄竴鍊嬮棞閸靛晱椤岋細鐢ㄩ浕闃婚噰妯�锛屾悕鑰楁瘮杓冨ぇ锛岄浕娴佹斁澶у悗鐣歌畩姣旇純澶�锛涚敤闆绘祦鍌虫劅鍣ㄦ垚鏈珮锛涚敤闆绘祦浜掓劅鍣ㄩ噰妯d笉鏄緢鏂逛究锛屽悓鏅傛渻浣块浕娴佸け鐪�銆傛湰鏂囨彁鍑轰簡涓€绋柊鍨嬬殑銆佹柟渚跨殑銆佺劇鎼嶇殑闆绘祦閲囨ǎ鏂规硶锛屽苟鍦ㄩ€欑ó闆绘祦妾㈡脯鏂规硶鐨勫熀绀庝笂瀵︾従(xi脿n)浜嗗苟鑱�(li谩n)绯荤当(t菕ng)鐨勫潎娴併€� 1涓€绋柊鐨勯浕娴侀噰妯f柟娉� 濡傚墠鎵€杩�锛屽湪鍧囨祦绯荤当(t菕ng)涓竴浜涘偝绲�(t菕ng)鐨勯浕娴侀噰妯f柟娉曢兘鎴栧鎴栧皯鏈変簺缂洪粸銆傝€屾湰鏂囨彁鍑虹殑閫欑ó鏂扮殑闆绘祦閲囨ǎ鏂规硶锛屾棦绨″柈鏂逛究锛屽張娌掓湁鎼嶈€椼€� 涓嬮潰浠ュ湒1鎵€绀虹殑Buck闆昏矾鐐轰緥锛岃鏄庨€欑ó鏂扮殑闆绘祦妾㈡脯鏂规硶鐨勫師鐞嗗拰鎳夌敤銆�
鍦�1绨″柈闆绘祦妾㈡脯闆昏矾
闆绘祦妾㈡脯闆昏矾鐢变竴鍊嬬啊鍠殑RC缍�(w菐ng)绲$祫鎴�锛岃ō娴侀亷L鐨勯浕娴佺偤iL锛屾祦閬嶤鐨勯浕娴佺偤iC锛孡鍏╃鐨勯浕澹撶偤vL锛岃几鍑洪浕澹撶偤vo锛孋涓婇浕澹撶偤vC锛屽墖鏈� vL锛媔LR1锛媣o=vc锛媔CR锛�1锛� 灏嶅紡锛�1锛夊湪涓€鍊嬮枊闂滃懆鏈熸眰骞冲潎鍊煎緱 VL锛婭LR1锛媀o=VC锛婭CR锛�2锛� 寮忎腑锛歏L鏄浕鎰熶笂鐨勯浕澹撳湪涓€鍊嬮枊闂滃懆鏈熺殑骞冲潎鍊�锛岄’鐒禫L=0锛� Vo鐐鸿几鍑洪浕澹撳钩鍧囧€�锛� IL闆绘劅闆绘祦骞冲潎鍊�锛岀瓑浜庤矤杓夐浕娴両Load锛� IC鏄浕瀹瑰湪涓€鍊嬮枊闂滃懆鏈熷収(n猫i)鍏呮斁闆婚浕娴佺殑骞冲潎鍊硷紝椤劧IC=0锛� R1鐐洪浕鎰熺殑绛夋晥涓茶伅(li谩n)闆婚樆锛圗SR锛�銆� 浜庢槸寮忥紙2锛夊彲鍖栫偤 ILR1锛媀o=VC锛�3锛� IL=ILoad=锛圴C锛峍o锛�/R1锛�4锛� 鎵€浠�锛岃妾㈡脯璨犺級闆绘祦鍙婇浕鎰熼浕娴佺殑澶у皬锛屽彧瑕佹娓琑C缍�(w菐ng)绲¢浕瀹逛笂鐨勯浕澹撶殑澶у皬灏辫浜�锛岄€欑ó鏂规硶鍙互寰堟柟渚裤€佺啊鏄�銆佹矑鏈夋悕鑰楀湴灏嶉浕娴侀€茶閲囨ǎ銆� 2 鍩轰簬鏂扮殑闆绘祦閲囨ǎ鏂规硶鐨勫潎娴佸師鐞� 浠ュ叐璺苟鑱�(li谩n)Buck闆昏矾鐐轰緥锛屽鍦�2鎵€绀�銆�
鍦�2鐢≧C缍�(w菐ng)绲$啊鏄撴娓浕娴�
鐢卞紡锛�3锛夌煡锛� VC1=IL1R1锛媀oVC2=IL2R2锛媀o 寮忎腑锛歏C1銆乂C2鍒嗗垾鐐篊1鍜孋2涓婇浕澹撶殑骞冲潎鍊�锛� IL1銆両L2鍒嗗垾鏄疞1鍜孡2涓婃祦閬庨浕娴佺殑骞冲潎鍊�锛屼害鍗冲叐璺几鍑洪浕娴佸钩鍧囧€�锛� R1鍙奟2鏄烤娉㈤浕鎰熺殑绛夋晥涓茶伅(li谩n)闆婚樆锛岀暥鍦ㄥ伐钘濅笂瑷▓骞惰伅(li谩n)闆绘簮姣忚矾杓稿嚭闆绘劅鍩烘湰涓婁竴妯f檪锛屽彲浠ヨ獚鐐篟1=R2銆� 鍥犳锛岃鎺у埗鍏╄矾闆绘祦鍧囨祦锛屽嵆瑕佹眰IL1=IL2锛屼簬鏄紝鍙鎺у埗VC1=VC2灏辫浜�銆傛墍浠ワ紝闆诲C1鍙奀2涓婄殑闆诲VC1鍜孷C2鍙互浠h〃鍏╄矾闆绘祦IL1鍙奍L2澶у皬锛屽彲鐢ㄤ締閫茶鍧囨祦鎺у埗銆� 閫欐ǎ锛屼究鍙緱鍒板鍦�3鎵€绀虹殑鎺у埗妗嗗湒銆�
鍦�3鍏╄矾Buck骞惰伅(li谩n)鍧囨祦绯荤当(t菕ng)妗嗗湒
3甯哥敤鍧囨祦鏂规硶鐨勫垎鏋愭瘮杓� 闁嬮棞闆绘簮骞惰伅(li谩n)绯荤当(t菕ng)甯哥敤鐨勫潎娴佹柟娉曟湁浠ヤ笅骞剧ó銆� 杓稿嚭闃绘姉娉曞嵆Droop锛堜笅鍨�锛屽偩鏂滐級娉曡(di脿o)绡€(ji茅)闁嬮棞璁婃彌鍣ㄧ殑澶栫壒鎬у偩鏂滃害锛堝嵆瑾�(di脿o)绡€(ji茅)杓稿嚭闃绘姉锛�锛屼互閬斿埌骞惰伅(li谩n)妯″鎺ヨ繎鍧囨祦鐨勭洰鐨勩€傞€欑ó鏂规硶鏄竴绋啊鍠殑澶ц嚧鍧囨祦鐨勬柟娉�锛岀簿搴︽瘮杓冧綆銆� 涓诲緸娉曢仼鐢ㄤ簬闆绘祦鍨嬫帶鍒剁殑骞惰伅(li谩n)闁嬮棞闆绘簮绯荤当(t菕ng)涓�銆傞€欑ó鍧囨祦绯荤当(t菕ng)涓湁闆诲鎺у埗鍜岄浕娴佹帶鍒讹紝褰㈡垚闆欓枆鐠�(hu谩n)鎺у埗绯荤当(t菕ng)銆傞€欑ó鏂规硶瑕佹眰姣忓€嬫ā濉婇枔鏈夐€氳▕锛屾墍浠ヤ娇绯荤当(t菕ng)寰╅洔鍖栵紝骞朵笖鐣朵富妯″澶辨晥鏅�锛屾暣鍊嬮浕婧愮郴绲�(t菕ng)渚夸笉鑳藉伐浣溿€� 骞冲潎鍊煎潎娴佹瘡鍊嬪苟鑱�(li谩n)妯″鐨勯浕娴佹斁澶у櫒杓稿嚭绔帴涓€鍊嬬浉鍚岀殑闆婚樆鍒颁竴姊濆叕鍏辨瘝绶氫笂锛屽舰鎴愬钩鍧囧€兼瘝绶氥€傜暥鏌愭ā濉婇浕澹撴瘮姣嶇窔闆诲楂樻檪锛岃几鍑洪浕澹撲笅闄�锛屽弽涔嬩害鐒�銆� 鏈€澶у€煎潎娴佹硶鍜屽钩鍧囧€煎潎娴佹硶鐩镐技锛屽崁(q奴)鍒ュ彧鏄瘡璺浕娴侀€氶亷涓€鍊嬩簩妤电閫e埌涓€姊濆叕鍏辨瘝绶氫笂銆傞€欑ó鏂规硶鍏跺璩�(zh矛)鏄竴绋€滄皯涓诲潎娴佲€濇柟娉�锛岄浕娴佹渶澶х殑閭e€嬫ā濉婅嚜鍕曟垚鐐轰富妯″锛屽叾浠栨ā濉婄偤寰炴ā濉婏紝寰炶€屸€滆嚜鍕曚富寰炴帶鍒垛€�銆� 骞冲潎鍊煎潎娴佸拰鏈€澶у€煎潎娴佹硶鐨勫潎娴佹瘝绶氭柗闁嬫垨鑰呴枊璺兘涓嶆渻褰遍熆鍚勫€嬮浕婧愭ā濉婄崹绔嬪伐浣滐紝骞朵笖鏄嚜鍕曞潎娴佹柟娉�锛屽潎娴佺簿搴︽瘮杓冮珮銆� 鍦�4鐐哄父瑕嬪潎娴佹柟娉曠殑鍘熺悊鍦�銆傚鏋滃潎娴佹瘝绶氭槸骞惰伅(li谩n)妯″闆绘祦鐨勫钩鍧囧€�锛屽墖鏄钩鍧囧€煎潎娴佹硶锛涘鏋滄槸骞惰伅(li谩n)妯″闆绘祦鐨勬渶澶у€�锛屽墖鏄渶澶у€煎潎娴佹硶锛涘鏋滃潎娴佹瘝绶氭槸骞惰伅(li谩n)妯″涓殑涓绘ā濉婄殑闆绘祦锛屽墖灏辨槸涓诲緸鍧囨祦娉�銆備絾鏄�锛屽湪閫欎簺鍧囨祦鏂规硶涓紝姣忓€嬫ā濉婇兘闇€瑕佹湁涓€濂楃崹绔嬬殑PWM鎺у埗鐠�(hu谩n)銆�
鍦�4甯哥敤鐨勫潎娴佹柟娉�
4鏂扮殑鍧囨祦鏂规 鏈枃鎻愬嚭鐨勬柟妗堟槸鍩轰簬鍓嶆墍杩扮殑姣忚矾鍔犱竴鍊嬬啊鍠殑RC缍�(w菐ng)绲℃娓叾鍒嗛厤鐨勯浕娴佸ぇ灏�銆傞浕瀹笴鍏╃鐨勯浕澹撳钩鍧囧€煎氨鍙互琛ㄥ緛閫欒矾妯″鐨勯浕娴佸ぇ灏忥紝鎵€浠�锛屽皪绯荤当(t菕ng)閫茶鍧囨祦鎺у埗灏辨槸灏嶅悇璺疪C缍�(w菐ng)绲涓婇浕澹撻€茶鍧囧銆傚叾鍧囨祦鍘熺悊鍦栧鍦�5鎵€绀�銆�
鍦�5骞惰伅(li谩n)鍏╄矾Buck闆昏矾鐨勫潎娴佺郴绲�(t菕ng)
鍦�5涓細Vbus鐐哄潎娴佹瘝绶氶浕澹擄紱 Vref鐐鸿几鍑洪浕澹撳弮鑰冨€�锛� Vs鐐鸿几鍑洪浕澹撶殑閲囨ǎ鍊�銆� 鍏跺伐浣滃師鐞嗗拰閬庣▼濡備笅锛� 閫氶亷妾㈡脯RC缍�(w菐ng)绲′腑C鍏╃鐨勯浕澹擄紝浣滅偤闆绘祦淇¤櫉锛屽咕璺浕娴佷俊铏燂紙鏈緥鍙湁鍏╄矾锛夐€氶亷涓€鍊嬬浉鍚岀殑闆婚樆灏卞緱鍒颁簡骞冲潎鍊煎潎娴佹瘝绶氾紝骞冲潎鍊煎潎娴佹瘝绶氶浕澹撳€艰垏璨犺級鏈夐棞锛岃〃寰佽矤杓夐浕娴佺殑澶у皬銆� 鐒跺悗灏囨瘡璺噰妯d締鐨勯浕娴佷俊铏熻垏姣嶇窔闆诲姣旇純锛屽緱鍒拌宸俊铏�锛屽幓淇杓稿嚭闆诲鍙冭€冧俊铏燂紝寰炶€屽皪PWM鎺у埗鍣ㄧ殑鍗犵┖姣旇几鍑洪€茶寰(di脿o)锛岄仈鍒板潎娴佸拰绌�(w臎n)澹撶殑鐩殑銆� 5 瀵︽脯绲�(ji茅)鏋� 妯f鏄竴鑷篋C5V杓稿叆锛�2V/40A杓稿嚭鐨�4璺疊uck骞惰伅(li谩n)鐨勯枊闂滈浕婧�锛屽伐浣滈牷鐜囩偤200kHz锛屽付涓婃豢杓夐€茶娓噺姣忎竴璺浕娴佽几鍑�锛屽潎娴佹晥鏋滃ソ锛岃宸湪2锛呬互涓�锛岄浕婧愯几鍑虹┅(w臎n)瀹氥€傜暥杓稿嚭闆绘祦瓒婂ぇ锛屽嵆澶у姛鐜囧苟鑱�(li谩n)鐨勯浕婧愮郴绲�(t菕ng)涓紝鍧囨祦鏁堟灉瓒婂ソ銆� 6绲�(ji茅)瑾� 鏈枃閫氶亷灏嶅父鐢ㄧ殑闆绘祦妾㈡脯鏂规硶鑸囧潎娴佹帶鍒剁殑鍒嗘瀽鐮旂┒锛屾彁鍑轰簡鐢ㄤ竴鍊婻C缍�(w菐ng)绲℃娓浕婧愯几鍑洪浕娴佺殑鏂规硶锛屽苟鍦ㄩ€欑ó闆绘祦妾㈡脯鏂规硶鐨勫熀绀庝笂绲﹀嚭浜嗕竴绋啊鍠殑骞惰伅(li谩n)绯荤当(t菕ng)鍧囨祦鐨勬柟妗�銆傞€欑ó鏂规浣块浕娴佹娓緢鏂逛究锛岃兘楂樻晥鐜囥€佷綆鎴愭湰銆佺啊鍠€佹柟渚垮湴瀵︾従(xi脿n)骞惰伅(li谩n)绯荤当(t菕ng)鐨勫潎娴�銆�

妯欑敖锛�

榛炶磰

鍒嗕韩鍒帮細

涓婁竴绡囷細鍩轰簬MATLAB鐨勯琛屾ā鎿櫒鎿嶇副...

涓嬩竴绡囷細寰兘WIN-V63鐭㈤噺鎺у埗璁婇牷鍣ㄥ湪...

涓湅鍌冲嫊缍�(w菐ng)鐗堟瑠鑸囧厤璨伈鏄庯細鍑℃湰缍�(w菐ng)娉ㄦ槑[渚嗘簮锛氫腑鍦嬪偝鍕曠恫(w菐ng)]鐨勬墍鏈夋枃瀛椼€佸湒鐗�銆侀煶瑕栧拰瑕栭牷鏂囦欢锛岀増娆婂潎鐐轰腑鍦嬪偝鍕曠恫(w菐ng)(www.wangxinlc.cn)鐛ㄥ鎵€鏈�銆傚闇€杞�(zhu菐n)杓夎珛鑸�0755-82949061鑱�(li谩n)绯汇€備换浣曞獟楂�銆佺恫(w菐ng)绔欐垨鍊嬩汉杞�(zhu菐n)杓変娇鐢ㄦ檪闋堟敞鏄庝締婧愨€滀腑鍦嬪偝鍕曠恫(w菐ng)鈥濓紝閬曞弽鑰呮湰缍�(w菐ng)灏囪拷绌跺叾娉曞緥璨换銆�

鏈恫(w菐ng)杞�(zhu菐n)杓夊苟娉ㄦ槑鍏朵粬渚嗘簮鐨勭ǹ浠�锛屽潎渚嗚嚜浜掕伅(li谩n)缍�(w菐ng)鎴栨キ(y猫)鍏�(n猫i)鎶曠ǹ浜哄+锛岀増娆婂爆浜庡師鐗堟瑠浜�銆傝綁(zhu菐n)杓夎珛淇濈暀绋夸欢渚嗘簮鍙婁綔鑰咃紝绂佹鎿呰嚜绡℃敼锛岄仌鑰呰嚜璨犵増娆婃硶寰嬭铂浠�銆�

缍�(w菐ng)绔欑啊浠�|鏈冨摗鏈嶅嫏|鑱�(li谩n)绯绘柟寮�|骞姪淇℃伅|鐗堟瑠淇℃伅|缍�(w菐ng)绔欏湴鍦�|鍙嬫儏閺堟帴|娉曞緥鏀寔|鎰忚鍙嶉|sitemap

鍌冲嫊缍�(w菐ng)-宸ユキ(y猫)鑷嫊鍖栬垏鏅鸿兘鍒堕€犵殑鍏ㄥ獟楂斺€滀簰鑱�(li谩n)缍�(w菐ng)+鈥濆壍(chu脿ng)鏂版湇鍕欏钩鑷�

缍�(w菐ng)绔欏鏈�鏈嶅嫏鍜ㄨ閲囪臣鍜ㄨ濯掗珨鍚堜綔

Chuandong.com Copyright ?2005 - 2025 锛孉ll Rights Reserved 娣卞湷甯傚ェ缇庡ぇ鍞愬唬鍛婃湁闄愬叕鍙� 鐗堟瑠鎵€鏈�
绮礗CP鍌� 14004826铏� | 鐕熸キ(y猫)鍩�(zh铆)鐓ц瓑鏇� | 涓嶈壇淇℃伅鑸夊牨涓績 | 绮靛叕缍�(w菐ng)瀹夊倷 44030402000946铏�