鎽� 瑕侊細鏈枃寰炲皬淇¤櫉(h脿o)鐨勮搴︿締(l谩i)鐪嬮€氶亷(gu貌)灏�(du矛)鍙嶉鐠�(hu谩n)璺敞鍏ヤ竴鎿惧嫊(d貌ng)淇¤櫉(h脿o)灏�(du矛)鏁村€�(g猫)鐢�(ch菐n)鍝侀€犳垚鐨勫奖闊�锛屼締(l谩i)琛￠噺鐢�(ch菐n)鍝佺殑绌�(w臎n)瀹氭€�锛屽啀鍒╃敤鐠�(hu谩n)璺垎鏋愬剙妾㈡脯(c猫)鐠�(hu谩n)璺仛瀹氶噺鐨勫垎鏋�锛屽叾绲�(ji茅)鏋滀互渚夸簬鏃ュ悗宸ヤ綔鐨勬敼閫�(j矛n)锛屽緸鑰屾彁楂樼敘(ch菐n)鍝佺殑鍙潬鎬�銆� 闂�(gu膩n)閸佃锛氬弽楗嬬挵(hu谩n)璺�銆佸付瀵�銆佺浉浣嶈閲�銆佸鐩婅閲�銆佺┅(w臎n)瀹氭€�

a mearurement of swtich power supply based on FRA

abstract: THIS article describes the affection to the whole product, which is because of injecting a perturbation signal into feedback loop,to evaluate the stability,then by the use the frequency response analyzer equepiment gets an accurate result,and the result is used for improvement ,as well as improve the products鈥� reliablity. keywords: feedback loop bandwidth phase margin gain margin stablity 闅ㄨ憲闆诲瓙锛岃嚜鎺�锛岃埅澶╋紝閫氳▕锛岄啱(y墨)鐧傚櫒姊扮瓑鎶€琛�(sh霉)涓嶆柗鍚戞繁搴﹀拰寤ｅ害鐨勭櫦(f膩)灞曪紝鍕�(sh矛)蹇呰姹傜偤鍏朵緵闆荤殑闆绘簮瑕佹湁鏇撮珮鐨勭┅(w臎n)瀹氭€�锛屽嵆涓嶅儏瑕佹湁濂界殑绶氭€ц(di脿o)绡€(ji茅)鐜�銆佽矤(f霉)杓夎(di脿o)绡€(ji茅)鐜囬倓瑕佹湁蹇€熺殑鍕�(d貌ng)鎱�(t脿i)璨�(f霉)杓夐熆鎳�(y墨ng)銆傝€岄€欎簺鍥犵礌閮藉拰鎺у埗鐠�(hu谩n)璺湁闂�(gu膩n)锛屾帶鍒剁挵(hu谩n)璺竴鑸伐浣滃湪璨�(f霉)鍙嶉鐙€鎱�(t脿i)锛岀ū涔嬬偤闆诲璨�(f霉)鍙嶉銆傚鏋滆畩鎻涘櫒涓矑鏈夌敤鍒板弽楗嬫帶鍒剁挵(hu谩n)璺紙鍗充笅鍦�1涓璈閮ㄥ垎锛�锛屽叾鍌抽仦鍑芥暩(sh霉)涓€鑸偤 鍏朵腑G鐐鸿几鍏ユ烤娉�銆佸姛鐜囪畩鎻�銆佹暣娴佹烤娉㈤儴鍒嗙瓑鍥犳暩(sh霉)鐨勪箻绌嶏紙鍥�?y脿n)妲犻寚姒�?j铆)鑱�(li谩n)鐨勫舰寮忥紝鎵€浠ユ湰鏂囦腑浠ョ附鐨勪箻绌嶅洜瀛怗渚�(l谩i)琛ㄧず锛�锛屽彲浠ョ湅鍑鸿几鍑洪毃钁楄几鍏ョ殑璁婂寲鑰屾垚绶氭€х殑璁婂寲锛屼絾鏄敱浜庢暣娴併€佹烤娉㈢恫(w菐ng)绲�(lu貌)鍦ㄦ暣鍊�(g猫)鏅�(sh铆)鍩熺殑闈炵窔鎬�锛屽(sh铆)闅涗笂閫欑ó璁婂寲鎳�(y墨ng)瑭叉槸杩戜技浜庣窔鎬�锛屾墍浠ョ暥(d膩ng)杓稿叆闆诲鏀硅畩鐨勬檪(sh铆)鍊欏苟涓嶈兘寰堝ソ鐨勮捣鍒扮┅(w臎n)澹撶殑浣滅敤锛涘鏋滃弽楗嬬挵(hu谩n)璺ō(sh猫)瑷�(j矛)鐨勪笉濂�锛屽皪(du矛)浜庤矤(f霉)杓夌殑鐬厠(t脿i)鏀硅畩锛岀挵(hu谩n)璺笉鑳藉仛鍑哄強鏅�(sh铆)鎭扮暥(d膩ng)?sh霉)鎭納(di脿o)鏁达紝閭ｄ箞杓稿嚭闆诲鐬枔鏈�(hu矛)鍋忛珮鎴栬€呭亸浣�锛岀敋鑷虫湁鍙兘閫犳垚闆绘簮绯荤当(t菕ng)鐨勬尟钑�锛屽皪(du矛)涓嬩竴绱�(j铆)妲�(g貌u)鎴愭悕澹�銆傛鏅�(sh铆)鑳藉?q奴)螡h(hu谩n)璺脯(c猫)閲忓氨椤緱寰堥噸瑕佷簡锛岄偅涔堢挵(hu谩n)璺儴鍒嗗張鏄€庢ǎ褰遍熆鏁村€�(g猫)鍥炶矾鐨勫憿锛熷弮鑰冮噾鍗囬櫧(y谩ng)鍏徃瀵鎴栬€匒C-DC绯诲垪鐢�(ch菐n)鍝侊紝姝ゆ檪(sh铆)涓嬪湒琛ㄧず鐨勬槸鍙嶉鐠�(hu谩n)璺帶鍒堕儴鍒嗕腑鐨勯亱(y霉n)鏀剧殑鐠�(hu谩n)澧炵泭妯″瀷锛屽叾鍌抽仦鍑芥暩(sh霉)鐐� 鍏朵腑G锛氶枊鐠�(hu谩n)澧炵泭锛孒锛氬弽楗嬬郴鏁�(sh霉)锛孏H锛氱挵(hu谩n)澧炵泭锛堝彲浠ラ€氶亷(gu貌)鍦�1涓帹灏�(d菐o)鐪嬪嚭锛� 涓€銆佺挵(hu谩n)澧炵泭绌�(w臎n)瀹氱殑妯�(bi膩o)婧�(zh菙n)锛� 鐢卞偝閬炲嚱鏁�(sh霉)鏈�锛屽洜?y脿n)姒夌朝绗冮灟鎷坃鐠�(hu谩n)澧炵泭G鏄牷鐜囩殑鍑芥暩(sh霉)锛屾渻(hu矛)闅ㄨ憲闋荤巼鐨勫鍔犺€屾笡灏忥紝鍚屾檪(sh铆)涔熷拰鏀惧ぇ鍣ㄧ殑鐩镐綅鏈夐棞(gu膩n)锛岀暥(d膩ng)GH= -1锛屽墖鍏跺偝閬炲嚱鏁�(sh霉)鐨勫€肩偤鈭�锛屽嵆澧炵泭鏄劇(w煤)绐ぇ鐨勶紝鍙互瑾�(r猫n)鐐轰换鎰忓皬鐨勮几鍏ユ摼鍕�(d貌ng)閮借兘寮曡捣杓稿嚭鐨勭劇(w煤)绐ぇ锛屽鏋滈€欑ó杓稿嚭鐒�(w煤)绐ぇ鐨勪俊铏�(h脿o)鍐嶅弽楗嬪埌鍔熺巼璁婃彌鐠�(hu谩n)绡€(ji茅)锛屽嫝(sh矛)蹇呮渻(hu矛)閫犳垚鏈€鍚庤几鍑虹殑鎸暕锛屾暣鍊�(g猫)绯荤当(t菕ng)鍥犺€屼笉鍐嶇┅(w臎n)澹�銆傛墍浠ヨ(shu艒)鍙互閫氶亷(gu貌)鍒嗘瀽GH鐨勫鐩婂拰鐩镐綅渚�(l谩i)鍒ゆ柗绯荤当(t菕ng)鐨勭┅(w臎n)瀹氭€�銆� 鍙堝洜?y脿n)妤�?d膩ng)GH= -1鏅�(sh铆)鏄尟钑╃殑锛屾墍浠ユ湁鐩哥Щ鈭燝H鏄�180°锛堝洜?y脿n)妯�?f霉)鍙嶉鏈韩灏辨湁180°鐨勭浉绉伙級锛屽洖璺鐩妡GH|=1锛�0dB锛夈€� 鎵€浠ヨ浣块亱(y霉n)鏀剧┅(w臎n)瀹氶渶瑕佹豢瓒充互涓嬫浠讹細1.鐩镐綅姊濅欢灏辨槸瑕佸叾鐩哥Щ瑕佸皬浜�180°锛屽嵆瑕佹湁45搴︿互涓婄殑瑁曢噺锛�2.閭勮婊胯冻澧炵泭姊濅欢鍗宠鏈�12dB浠ヤ笂鐨勮閲忥紱3.绌胯秺闋荤巼鎸�20dB/Dec闁夊悎銆傜浉闂�(gu膩n)瑙ｉ噵涓嬫枃绲﹀嚭銆� 浜�銆丅ode鍦栫殑鍩虹(ch菙)锛� 鐢变笂鏂囩煡鎴戝€戝彲浠ラ€氶亷(gu貌)鐠�(hu谩n)澧炵泭GH鐨勯牷鐜囩壒鎬т締(l谩i)鍒ゆ柗绯荤当(t菕ng)鐨勭┅(w臎n)瀹氭€э紝鑰屽洖璺鐩妡GH|浠ュ強鍥炶矾鐩镐綅宸垹GH鐨勯牷鐜囩壒鎬у彲浠ョ敤Bode鍦栵紙瑕嬪湒2锛変締(l谩i)琛ㄧず锛屽苟涓旂郴绲�(t菕ng)鐨勭┅(w臎n)瀹氭€у彲浠ラ€氶亷(gu貌)Bode鍦栦腑鐨勭浉浣嶈閲忥紙phase margin锛� ,澧炵泭瑁曢噺锛坓ain margin锛�锛岀┛瓒婇牷鐜囷紙crossover frequency锛変締(l谩i)琛￠噺銆傚叾涓� 鐩镐綅瑁曢噺锛坧hase margin锛夋槸鎸囷細鍦ㄩ牷鐜�-鐩镐綅鏇茬窔涓婏紝鐣�(d膩ng)鐠�(hu谩n)璺鐩婄偤鍠綅澧炵泭鏅�(sh铆)瀵�(sh铆)闅涚浉浣嶅欢閬茶垏360deg 闁撶殑宸€�锛屼互搴︼紙deg锛夌偤鍠綅琛ㄧず锛岃鍦�2銆� 澧炵泭瑁曢噺锛坓ain margin锛夋槸鎸�: 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鏈枃寰炲弽楗嬬挵(hu谩n)璺敞鍏ユ摼鍕�(d貌ng)淇¤櫉(h脿o)鐨勮搴︿締(l谩i)鍙嶆槧闁嬮棞(gu膩n)闆绘簮绌�(w臎n)瀹氭€�锛岀郸鍑虹┅(w臎n)瀹氭€х殑妯�(bi膩o)婧�(zh菙n)锛孊ode鍦栫殑瑾�(r猫n)璀�(sh铆)锛孎(xi脿n)RA鐨勪娇鐢ㄥ寘鎷摼鍕�(d貌ng)淇¤櫉(h脿o)鐨勬敞鍏ャ€佺挵(hu谩n)璺壒鎬х殑娓�(c猫)閲�锛屼互鍙婂(sh铆)椹�(y脿n)绲�(ji茅)鏋滅殑绨�(ji菐n)鍠垎鏋愶紝鏈€鍚庢彁鍑洪渶瑕佹洿鏀圭殑鍦版柟銆傜暥(d膩ng)鐒剁郴绲�(t菕ng)鐨勭┅(w臎n)瀹氭€т篃鍙互鐢辨檪(sh铆)鍩熺殑鏂瑰紡渚�(l谩i)鍋氬畾鎬х殑鍒嗘瀽锛屼絾鏄€氶亷(gu貌)闋荤巼闊挎噳(y墨ng)鍒嗘瀽鍎€鍗诲彲浠ュ湪闋荤巼鍩熶笂瀹氶噺鐨勬眰鍑�锛屽緸鑰屽皪(du矛)绯荤当(t菕ng)鐨勬€ц兘鍋氬嚭鏇寸洿瑙€鐨勫垽鏂枫€� 鍙冭€冩枃鐛�(xi脿n)锛� [1]锛氥€婇亱(y霉n)绠楁斁澶у櫒鐨勭┅(w臎n)瀹氭€с€婽im Green 寰峰窞鍎€鍣ㄥ叕鍙�. [2]锛氥€婃脯(c猫)閲忛枊闂�(gu膩n)闆绘簮闁夌挵(hu谩n)鍙嶉?l谩i)鎲�?y墨ng)銆婯en Salz Clarke-Hess閫氫俊鐮旂┒鍏徃. [3]锛氥€奆requency response analyzer銆媔nstruction NF Corporation. [4]锛氥€奡mall-signal analysis and control design of isolated power supplies with opt coupler feedback銆媃uri Panov and Milan Jovanovich . Power electronic laboratory Delta corporation.