[毕业设计]高频flyback_变压器(偶合电感器)最佳之设计

ORLANDOA1A01高频FLYBACK变压器偶合电感器最佳之设计一前言由于市场日益竞争,如何将产品的价格降低,体积缩小,质量提高变成现今大家所共同努力的目标而在SWITCHPOWERSUPPLY的领域里,变压器是非常重要的一部份,而FLYBACK变压器更在其中占了举足轻重的地位如何将变压器最佳化,就显得额外的重要我们可以从很多SPS书籍中获得FLYBACK变压器的设计方法,虽然不尽相同,却是大同小异就一个设计者的角度来说,设计一个FLYBACK变压器并不难,只要将设计的参数订定,依照书上所写的设计步骤,一个变压器就诞生了,在这变压器诞生的同时,你难道不G1262G5588G11109,这变压器是G2554G1038最佳的变压器G2614G3252G1038在这设计的参数里G17836G19556G15267了不G11842定的G3252G4388G1375如FLYBACK变压器G2033G13435G8991电感G1552参数的订定,你如何G14033G11842定你G2030G5332G3999设计所G17885定的感G1552G4557这G20075变压器是最佳感G1552G2614G7424G7003将G19036G4557设计参数G1582G17839一步的G6518G16764,以G17810G2052变压器的最佳化二变压器设计在G4466G19481设计变压器时,G7389G1016个G2419G2029是G5529G20047G8892G5859G2052的1G9213G2331这是设计变压器最G1039要的G20045目G2656目的,G4445G16280里G7389G16280定变压器的最高G9213G2331,变压器的G9213G2331G19668在G4445G16280的G19492G2058G14551G3272G1881G1375如CLASSA的G13489G4557G9213度不G14033G17241G1781990G101CCLASSB不G14033G17241G17819110G101CG12573G12573,这G18129是我们设计G5529G20047G17993G5502的G1946G20292G13475G8994G5831在这市场上G994G1166竞争,G13475G8994G13783量是不可G6122G13582的,G4600其是变压器G5460G5460是G7438器COST中的G1039要部G2010之一,所以如何将变压器的价格,体积,质量G6496G6581G2052最佳,就是我们所努力的方G25331设计步骤要将变压器最佳化,G19668将不同的参数重G3809G1207G1849计G12651,如G7536G2045G11004EXCEL的方G12255G5347G6122G2045G11004G12255G5219G16833言将G1856G5347写G991来,这G7691将变得很G12628G2345,只要G6925变参数就可得G2052G13479G75361参数的订定在设计变压器之前,G19668G1820G20056定一G1135参数,很多书籍上这G1135参数G18129不同,不同的设计参数,设计G8981G12255G1146不同,现在G19036G4557FLYBACK变压器最常G11004的设计参数G17767G1849电压VIN,G17767G1849的频G10587FS,最大DUTYCYCLEDMAX,G2033G13435G994G8437G13435G3292数G8616N,G2033G13435电感G1552LP,G17767G1998电压VO,G17767G1998最大WOG13459G3292的电G8981G4506度J,最大G11925G17902G4506度BMAX,最大G13481G13459G3252G4388KW2由这G1135设计参数G12651G1998DUTYONG2033G13435G8991G4560G17902的G8616G1375DUTYOFFG8437G13435G8991G4560G17902的G8616G1375G2033G13435G1144G8981电G8981G1552G141IPPG2033G13435电G8981PEAKG1552IPPEAKG2033G13435电G8981RMSG1552IRMSG2033G13435G13459G3292的G13459G5464G158PG8437G13435电G8981PEAKG1552IPPEAKORLANDOA2A32G8437G13435电G8981RMSG1552IRMSG2033G13435G13459G3292的G13459G5464G158SG7389G6940G11925G17347G19766积G994G19093G5527可G13481G19766积的G1068积ACAW在由AWACG17885G6333G17878当的G19093G5527设计参数里G7389G1135是定死的,G1375如VIN,FSIC操作频G10587,DMAXICMAXDUTYCYCLE,VO,WOG7389G1135是依G13475验所定的,G1375如电G8981G4506度JCLASSA自然散热OFFONDD,G2029操作于CCMORLANDOA8A95以此作G1038G2010隔CCMG994DCM若只G6925变LP的G1552,其余G20056定参数固定,将得G2052一LPG994ACAW的关系如G991感G1552愈大,所G19668的变压器愈大3变压器CORE的G17885G6333再G17885G6333CORE之前,G7389几点是G5529G20047G8892G5859G994了解的ICORELOSS的G9213度特性依据G7438器所G16280定的周G9213,当CORE的G9213度上G2331时,我们希望其CORELOSS是随着G9213度而G991降,如此才G8616较不G1262G7389热跑脱的现象发生II当铜损G19093损时,G6940G10587最高III变压器的大小直接影响G2052系统的操作模G5347,所以G5529G20047清楚DCMG994CCM的优G13582点,才G14033G17885G6333G2052最G17878合G19668求的COREIV符合最G13475G8994的G2419G2029也就是说10元G14033符合G16280格G994G19668求决不多花1毛钱VG17885G6333的CORE愈大,G6940G10587不一定愈高,但散热G19766积愈大,G9213G2331G1262愈低若了解以上几点后,依据G19668求G17885定变压器的COREG1375如若在乎的是散热问题,可G17885G6333大一点的COREG2656CORELOSS较小的CORE如MPPCORE若在乎的是体积G2656价格,可以G17885G6333较小G994市场上价格较低的CORE如PC30,PC40,MZ4,EE,EICORE若CORE的大小不知如何G17885G6333,建议G1820G17885G6333符合2倍BOUNDARY感G1552计G12651G1998来ACAW的CORE4变压器最佳化当你G17885定CORE之后,可得知其ACAW的G1552在小于ACAW的G2419G2029G991变动G20056设参数感G1552LPG994电G8981G4506度,也就是G12573于G6925变铜损G994G19093损之间的关系可以得G2052LPG994LOSS之间的关系图如G991当PCU铜损PFEG19093损时,TOTALLOSS接近最低G1552此感G1552正是最佳的G17885G6333ORLANDOA10A116CORELOSSG19093损G994材料特性G7389关,G2058造商G1262提供G2345位G19093损的相关资料,G7389的是G4557照图,G7389的是以G991的G1856G5347NMFEFBKPBG11925G17902G4506度变化量,810FANDVBCPONINMG2656N依材质不同而异CORELOSSPFEVEVECORE的体积COUPLELOSS铜损G994操作频G10587G2656使G11004G13459G5464G7389关,各种G13459G5464的G13459材G18129G1262提供G2345位长度的直G8981电阻G1552,但除了G13459G5464中的标G1946G1552G8981电阻外,G17836存在着由于G1144G8981电G8981集肤G6940应所产生的G13481G13459电阻增量DCACDCRMSCURRRIP220003930120TCRCTRDCDCG1038了减少集肤G6940应所带来的损失,可以使G11004多股G13459,但多股G13459的G13459G5464并非愈小愈好,太多的G4560G13459,层数太多,邻近G6940应所造成的损失G1262增大,甚至大G17819G11004多股G13459所降低的损失由G991列G1856G5347可得知DCRACRFRRFG3252邻近G11925场切割所造成的增量其P,X,FR关系如G991图,其中WDNDX0866PNUMBEROFLAYERORLANDOA10A117NNUMBEROFTURNSDWIREDIAMETERSKINDEPTHWLAYERWIDTH当G12651G1998TOTALLOSSCORELOSSCOUPLELOSS可以G1820G15261由以G991G1856G5347,G12651G1998G5948G11065的G9213G2331,以G2040定是G2554符合G4445G16280的标G1946当G9213G2331G17819高时,G15932G12046G17885的CORE太小,散热G19766积不G3827若G9213G2331很低,G15932G12046可以再将CORE缩小以G17810G2052最G13475G8994之G2419G2029G4466G19481的G9213G2331G1262G8616此G1856G5347G12651G1998的G9213G2331高SLOSSTOTALAPT800WCSAAA34AS散热G15932G19766积2CM一切G18129决定后,就G2109G991G13481G13459的方法若要降低G9443感,最好是G11004G989G7138G8847G13481法,而G1000G13481G13459G4506度要G5191G3355若要G19462G8502EMIG2029可G2164G1849法拉第铜G10627G4439可降低一,G1120G8437G8991的G7446散电G4493G1552,G16765COMMONMODENOISEG994DIFFERENTIALMODENOISE不G7143G13475由变压器的G7446散电G4493G1268G4560G1998G2447,此方法G1262降低G13481G13459G3252G13044KW,G3252此在一G5332G3999就得决定G2164不G2164法拉第铜G10627三G4466G1375设计1参数的订定G7389一G17767G1998PO20W,VO12V的直G8981G17728G6454器,G17767G1849电压G14551G3272G10381860VDC,FS100KHZ,G19668符合G4445G16280CLASSB,J65A/2MM,一G1120G8991G7092G20047G4445G16280间距,不G2164法拉第铜G10627,KW03,BMAX2500G,DMAX048由VIN18V,DMAX048NG17885定G103813BOUNDARY感G1552G1038194UHLP選定為40UHORLANDOA12A1382理论计G12651由设计理论可以G12651G1998G991列的G1552DUTYONG2033G13435G8991G4560G17902的G8616G13750464DUTYOFFG8437G13435G8991G4560G17902的G8616G13750536G2033G13435G1144G8981电G8981G1552G141IPP2321AG2033G13435电G8981PEAKG1552IPPEAK3554AG2033G13435电G8981RMSG1552IRMS1693AG2033G13435G13459G3292的G13459G5464G158P0576MMG8437G13435电G8981PEAKG1552IPPEAK4620AG8437G13435电G8981RMSG1552IRMS2365AG2033G13435G13459G3292的G13459G5464G158S0680MM集肤深度220MM所以G17885G6333G13459G5464044MM的G13459G546402MM多股并G13481,N1G110048条,N2G1100412条022MMG13459G5464并G13481JIS2种G13459材02MMG13459G5464最大G4448成外G5464G1038022MMG7389G6940G11925G17347G19766积G994G19093G5527可G13481G19766积的G1068积ACAW114734MM3CORE的G17885G6333G17885G6333COREEE19,材质PC40,其ACAW1258564MM,CORELOSS在接近100G101C时最低BSAT25G101C5100GBSAT60G101C4500GBSAT100G101C3900GBSAT120G101C3500GAC2282MMAW5522MMVE88953MMG5191G3355G8611G2289长度MLT431MM4变压器的最佳化JIS2种G13459材02MMG13459G5464最大G4560体电阻5772OHM/KMG5049作G9213度90G101C时,最大G4560体电阻736OHM/KMG1207G1849变压器正常操作G991的G17767G1849电压275V,在符合ACAW1258564MM的条件G991,G6925变LPG994J可求得G991列关系图ORLANDOA14A159当LP感G155240UH,N12283,786条并G13481,N21756,1356条并G13481时CORELOSS0288COUPLELOSS0358,TOTALLOSS最低0646W,G1207G1849G991G5347,G12651G1998其G5948G11065G9213G23310612WCSAAA34CAPTSLOSSTOTAL980042,G2474感G1552LP40UH,N122,02MM8条并G13481,N217,02MM14条并G13481四G13479论在G4466G19481设计上,G11004常G5589电