
电流型PWM控制器UC3845及其在弧焊逆变电源中的应用_熊腊森.pdf
3页Èo, 1998 (4) : 17~ 18 , 25 17È@PWM eÅ`Il=3845#¶nIMÈ÷Ï¥¨Cu rre n t M>e PW MËn tr oller UC 3845 and its a'lie ati o n s in Ar e Weldi ng In v ert er¿Ï ØývÐ(430 074)§ æH u az ho n geiv ersity o fien ee & Te ehn o lá¦ÅVXion g l¹se n m-¥K1 x1 È@ÈâPW M eÅ¥ýTð Ø#/+Ä bºÈ@PWM eÅ1 q384 5¶oIMÈ÷Ï¥¨ b1oM:È@PWM¶oIMÈ÷¨[Ab stqct ràhe pri n e iple s a n d eha rae te risti es o f the e ure n t m ed e PW M eon tro ller and the v o ltam ed e PWM eo ntro ller a rc eo n 1Pa red , a n d the a'liea tio n s o f the etir ren t m:e PWM e on tro ller U q3845 ina re we ldi ng in v ert er 15 intro ldu eed in thi s PaWr .Èy w o: e u r e n t m ed e PWM a rc we ldiin v erte r a'liea tio n1ýIMT¶oÈ÷,+Y^ÚÔĶoIMÈ÷^È÷N oZOklþê p¶oÈ÷Ï¥¨?Z bÛ"È ïÈ0/¥áÎ?Zÿq 71q a"î eÅq¥C,v¹wîIM¶oÈ÷ÁÌ"d.KvÄ^ÈýTHÈ÷È^=¥È@|ÀµÐ{ eÅ.L¿V@¹,iOY¤,×çµ bm1ÈâPW M eÅ"dð Ø m2. 2È@PWM eÅÈ@ eÅ^Èâ eÅ¥Ä7?Z¥.ñ"=Èâ eÅ¥{Èâ¥Q eÅs,»9FBñÈ@Q Ì«,ð Ø mÂm2îU bÈ@ eÅ^BñÈâ aÈ@>Ì eÅ"d.=̹È@ eÅÌ,̹Èâ eÅÌ b{Èâ+MÄÁUMÄ,{È@LMÄÁVMÄH.ûöPPV+Ó¥{] b1MÄ bÕ eÅZT V¿ÿñ"d¥ÈâØqÈ@Øq,9 V¿ÿ"d¥§ÿY bm2È@PW M eÅ"dð Ø m2. 3È@Pw M eÅ¥ªÄ18{^M¹®ÈÜ,ÜdÊ{M¹ÚÈÜ,{ eÅÂNÛù¹ýT bPWM|¥6® %ç,/®ÿq 715È@{Èâ] %ç bQ(?TKÅPWM¥] b1Ø«S¶OB50%= bL q384 5¥ýTÔq®4¤¥çHÈER : ,çHȸG!ç,9ØT¹:f= l/ T = 1/0 . 5ºR§: = 1. 8/R :C : a, e qVØÐLl£ü,È@ eÅ µÈâ eÅ V1E¥ªÄ b(l){¦Èâ¥Y y b{¦Èâv| aU@ î#L^ÏñÄ ¥Y7Á 715ÈËÈ@MÄ, ë'QÈ@ eÅí^7$]Å bü£{Èâ¥×ç b7Èâ eÅÏ,_©È^{¦Èâ¥MÄÀµ°¤¥Q,B°1©{Èâ?3Bç¥MĪثz,Bî1©5B10ñýÔÛo?Y{¦Èâ¥MÄ byN,ÈâeÅ¥È÷"dÜÈöy{¦È⥠¶¤Á3v¥UÈ@7Pÿq5åÊ b7È@ eÅ VEç Ë#p?3 b(2)%µ¥ïñ_©È@´eÄV¹^¹,vv4ÚýT V L b®¿=̨°¤¥ÈËÈ@´_©/, V[#H a2ù¹_©§ÿÈ@´,V7L^CV^H, V[¹ 715Mâ b(3)"d×çz,µY y bV eÅ Ø,Èâ eÅ>Ì"d^BñµHq¥=¨×ç"d b7È@PWM eÅ>Ì"d^BñíHq¥B¨×ç"d,"d×çz b]H®¿ÈËÈ@´Ð°@{Ü (´î1,ÈËÈ@ ë'Q{È@MÄ,ÈË¥üþT¨Àµ,yNµY y b(4)µ1îK@T¨,¸^LC!Ti óÈ" ¥ñÈ÷¥ (@i ó b®¿µïñÈ@KÅ¥È@=Ì,ñIM¶oÈ÷i óH,ÄñÈ÷¥ÿ ë¥È@µQ ,òñÈ@µQ "dµM]¥óçÈ@´,yNÈ@1î (s¥ b(5)¶È^e,î' ®,^¿»© b,È@ eÅ9µñ¥Ä,¹ÈË´È@Ð{Ü (È@µµ;ºyÈ@6qv7 V?Á FÄ ?µ© btÄû VYV|a¥n@Í[³ % b3È@PW M eÅËI-U384 5¥'ð Ø1Y{38 45^È@ eÅ{TzØÅ,¾Ë¥îÈâ´¹8 . 4V ,1>ÈâË´¹7 . 6V b1Y3845¥=È^ m#Âm3îU:1Y3845¥ýTð Ø^:ÈâóçÐQ ÈâܵbvT¹ÊKÈâVÐQ È@Ü"ª¥ÈâVBÈ@Ë1 ,ÑVÊKÈâª,¾1 {¹ÚÈÜ,ÂR S(?¥¯ÊR .P{Q¹ÚÈÜ,ÜdÊ{¹®ÈÜ1ÿq5,iûÕÿ°À{(?ÂÊSdʹ¸ b{¹ÚÈÜH,dÊSÔ{®ÈÜ.ÿq 715SÔ1,HW®{z %ç,{/¥]H, R S(?ÝLú)Ô}.°/c oªØ=Rrr/ Crr\. r bC(Bm P1 fþ@Ëm3 Ll=38 4 5=È^ m#mm3Ï,»1^Ê,¤E¸íq[ʵbv¥Ôq+ b»2^Q ,||"ÈâFÀµbvA ,¥QM{¦,Ð]M{¦¥ÈâÉ1 ,Á3µÈâ b»ØÈâl¿I VH, zØÅ)¿ÈýTÿ,3Èâ©¿v¿I VH, PW MÈ@Ë1 ÚÚÈÜ|PW Míi¯Ê,P{1> bÂT#ph>,/BñHÒ|PPW Míi1îÂÊ bl q3845¥{¦!ÂBñ34 V¥×â5, Vµr¹]¸Úâ_¦7/î¥åÊ b4 IX=384 5¶oIMÈ÷Ï¥¨tY38 45¥¶È^e,íq,iO?ª ,î'® b¾Ë{¥Kv] b1¹50 % ,YȨ¿TMÐÏ bm4¹3¨Il{3845 eÅ¥¶oIMÈ÷¥öÈ^,m5^[lr 38 45¹Ï¥ eÅÈ^¤Lð Øem.öÈ^¥{È@|^YV1¦ÖjÈ@.Ë"LC¥ bBB» mD n nV D SvfIE Mml¶oIMÈ÷j:lf^(/25:)25ü^ZoëÐM:LòÄ Ö:J _ , _ , _ b gçQÏBrsin¿aBY <