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鎮ㄥソ锛屾杩庝締鍒扮董搴浕瀛愬競鍫寸恫(w菐ng) 鐧婚寗 | 鍏嶈不娉ㄥ唺

PWM闆昏矾
闁辫畝锛�16185鏅傞枔锛�2010-12-17 14:02:51

銆�銆�鑴堟矕瀵害璁婅(di脿o)(PWM:Pulse Width Modulation)闆昏矾闄や簡鍙互鐩�(ji膩n)鎺у姛鐜囬浕璺殑杓稿嚭鐙�鎱�(t脿i)涔嬪锛屽悓鏅傞倓鎻愪緵鍔熺巼鍏冧欢鎺у埗淇¤櫉锛屽洜姝ゅ唬娉涙噳(y墨ng)鐢ㄥ湪楂樺姛鐜囪綁(zhu菐n)鎻涙晥鐜囩殑switching 闆绘簮銆侀Μ閬�(d谩)Inverter銆�闊抽熆鐢― 妤靛骞呭櫒銆�DC-DC Converter銆�UPS绛夊悇绋珮鍔熺巼闆昏矾銆�

鎺у埗鍘熺悊

銆�銆�PWM 闆昏矾鍩烘湰鍘熺悊渚濇摎(j霉): 娌栭噺鐩哥瓑鑰屽舰鐙�涓嶅悓鐨勭獎鑴堟矕鍔犲湪鍏锋湁鎱ｆ�х殑鐠�(hu谩n)绡�(ji茅)涓婃檪鍏舵晥鏋滅浉鍚�銆侾WM 鎺у埗鍘熺悊, 灏囨尝褰㈠垎鐐�6 绛変唤, 鍙敱6 鍊嬫柟娉㈢瓑鏁堟浛浠�銆傝剤瀵(di脿o)鍒剁殑鍒嗛鏂规硶鏈夊绋�,濡傚柈妤垫�ц垏闆欐サ鎬�, 鍚屾寮忚垏鐣版寮�, 鐭╁舰娉㈣(di脿o)鍒惰垏姝ｅ鸡娉㈣(di脿o)鍒剁瓑銆傚柈妤垫�WM 鎺у埗娉曟寚鍦ㄥ崐鍊嬪懆鏈熷収(n猫i)杓夋尝鍙湪涓�鍊嬫柟鍚戣畩鎻�, 鎵�寰桺WM 娉㈠舰涔熷彧鍦ㄤ竴鍊嬫柟鍚戣畩鍖�, 鑰岄洐妤垫�WM 鎺у埗娉曞湪鍗婂�嬪懆鏈熷収(n猫i)杓夋尝鍦ㄥ叐鍊嬫柟鍚戣畩鍖�, 鎵�寰桺WM 娉㈠舰涔熷湪鍏╁�嬫柟鍚戣畩鍖�銆傛牴鎿�(j霉)杓夋尝淇¤櫉鍚岃(di脿o)鍒朵俊铏熸槸鍚︿繚鎸佸悓姝�, PWM 鎺у埗鍙堝彲鍒嗙偤鍚屾瑾�(di脿o)鍒跺拰鐣版瑾�(di脿o)鍒�銆傜煩褰㈡尝鑴堝瑾�(di脿o)鍒剁殑鐗归粸鏄几鍑鸿剤瀵垪鏄瓑瀵殑, 鍙兘鎺у埗涓�瀹氭鏁�(sh霉)鐨勮娉�; 姝ｅ鸡娉㈣剤瀵(di脿o)鍒剁殑鐗归粸鏄几鍑鸿剤瀵垪鏄笉绛夊鐨�, 瀵害鎸夋寮﹁(gu墨)寰嬭畩鍖�, 杓稿嚭娉㈠舰鎺ヨ繎姝ｅ鸡娉��傛寮︽尝鑴堝瑾�(di脿o)鍒朵篃鍙玈PWM銆傛牴鎿�(j霉)鎺у埗淇¤櫉鐢�(ch菐n)鐢熻剤瀵槸瑭叉妧琛�(sh霉)鐨勯棞(gu膩n)閸点�傜洰鍓嶅父鐢ㄤ笁瑙掓尝姣旇純娉�銆佹化鐠�(hu谩n)姣旇純娉曞拰绌洪枔闆诲鐭㈤噺娉�銆�

浣滅敤

銆�銆�PWM 闆昏矾涓昏鍔熻兘鏄皣杓稿叆闆诲鐨勬尟骞呰綁(zhu菐n)鎻涙垚瀵害涓�瀹氱殑鑴堟矕锛屾彌鍙ヨ┍瑾畠鏄皣鎸箙璩囨枡杞�(zhu菐n)鎻涙垚鑴堟矕瀵害銆備竴鑸瑂witching 杓稿嚭闆昏矾鍙兘杓稿嚭闆诲鎸箙涓�瀹氱殑淇¤櫉锛岀偤浜嗚几鍑洪浼兼寮︽尝涔嬮闆诲鎸箙璁婂寲鐨勪俊铏�锛屽洜姝ゅ繀闇�灏囬浕澹撴尟骞呰綁(zhu菐n)鎻涙垚鑴堟矕淇¤櫉銆�

銆�銆�楂樺姛鐜囬浕璺垎鍒ョ敱PWM 闆昏矾銆丟ate 椹�(q奴)鍕曢浕璺�銆丼witching 杓稿嚭闆昏矾妲�(g貌u)鎴�锛屽叾涓璓WM 闆昏矾涓昏鍔熻兘鏄娇涓夎娉㈢殑鎸箙鑸囨寚浠や俊铏熼��(j矛n)琛屾瘮杓�锛屽悓鏅傝几鍑哄彲浠ラ﹨(q奴)鍕曞姛鐜嘙OSFET 鐨勬帶鍒朵俊铏�锛岄�忛亷瑭叉帶鍒朵俊铏熸帶鍒跺姛鐜囬浕璺殑杓稿嚭闆诲銆�

鐗归粸

銆�銆�PWM闆昏矾鐨勭壒榛炴槸闋荤巼楂�銆佹晥鐜囬珮銆佸姛鐜囧瘑搴﹂珮銆佸彲闈犳�ч珮銆佺劧鑰岀敱浜庨枊闂�(gu膩n)鍣ㄤ欢宸ヤ綔鍦ㄩ珮闋婚�氭柗鐙�鎱�(t脿i)锛岄珮闋荤殑蹇�熺灛璁婇亷绋嬫湰韬氨鏄竴闆荤楱锋摼婧�锛屽畠鐢�(ch菐n)鐢熺殑EMI淇¤櫉鏈夊緢瀵殑闋荤巼鑼冨湇锛屽張鏈変竴瀹氱殑骞呭害銆傝嫢鎶婇�欑ó闆绘簮鐩存帴鐢ㄤ簬鏁�(sh霉)瀛楄ō(sh猫)鍌�锛屽墖瑷�(sh猫)鍌欑敘(ch菐n)鐢熺殑EMI淇¤櫉鏈冭畩寰楁洿鍔犲挤(qi谩ng)鐑堝拰寰�(f霉)闆�銆�

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