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!!电气性能参数:额定输入电压:168354VV;(N1)输出8路:15/0.15VA+(3路)(N2,N3,N4);15/0.3VA;(N5)反馈:16V/0.2A;(N6)输出功率:13.5W预计效率:%75输入功率:18W最大占空比:38.0maxD工作频率:100kHz工作模式CCM(连续模式)主要器件参数计算:变压器设计1.确定铁芯材料和型号选用软磁铁氧体JP3,EE型铁芯,根据式(6-1)确定铁芯型号。8111max1102jKNIKBNTUSQCON8maxmax102jKKBTPCONo=58213.5100.4510742.860.7510.3400=40.18cm(6-1)式(6-1)中,S为铁芯截面积(2cm)、Q为铁芯窗口面积(2cm)。JP3的饱和磁感应强度kGSBs1.5,考虑到高温时sB会下降,选定工作最大磁感应强度GSBBsm260021;设在ONT期间铁芯磁感应强度的变化量为B,工作磁感应强度为B,CCM模式时铁芯工作于第三种工作状态,电流临界连续时输出功率maxmin61ooPP,则GSBKBBBBm26006712,GSB57.2228,GSKBB86.7422,kHzfs100,sTs10,maxmax4.5ONsTDTs,最大输出功率max13.5oPW,效率75%。取铁填充系数1cK,窗口利用系数3.0K,导线电流密度2/400cmAj。选用EF22/15型铁芯,该铁芯的25.75.70.3249CSSDCcm(6-2)2216.25.711.31.18652BCQEcm(6-3)440.390.18SQcmcm2.绕组计算(1)计算电感电流临界连续时原边电感min1L22262minmax1min6min168(4.510)0.75952622(1/6)13.51010iONoSUTLHPT(6-4)(2)计算铁芯上所开气隙的长度6028280.413.510102102(1/6)0.750.32492228.5710oSCPTKSB0.042cm(气息只可增大以保证输出功率,但气息最好不要大于1毫米)(3)计算原边绕组匝数6881109526100.04210103130.40.3249CLNS(6-6)(4)计算匝比,确定各副边绕组匝数1121314152=NnnnnNmaxminmax024.51688.87()()5.5(150.5)ONiONDTUTTUUmaxmin11656max4.51688.09()()5.517ONiONDTUNnNTTUoU各副边绕组的匝数为:123451231335.38.87NNNNNn,取35匝。重新计算原边匝数18.8735310.45N,取310匝161631038.38.09NNn,取38匝。(5)根据1N来校核原边绕组电感22'88101min3100.40.324910100.042CNSL9337H计算值9526H重新校对:N1=320匝N2=N3=N4=N5=36匝N6=40匝22'88101min3200.40.324910100.042CNSL9949H计算值9526H(6-8)计算各副边绕组的电感2''''8202min3min4min5min10CNSLLLL28360.40.324910125.920.042H(6-9)2'8606min10155.46CNSLH(6)计算变压器原副边绕组电流有效值储能变压器原副边电感电流波形如图6-2所示。原副边磁化电流为:maxmin1min1'ONiTLUI661684.5109949100.076A(6-10)22345'2min()(1)oDSUUDTIIIIL664.55.510125.92100.2A(6-11)同理计算得,60.608IA。原副边电流峰值为:1minmax1'112121IUTTPIIIiONop6613.5101010.0764.5101680.7520.278A(6-12)022342112pppIIIIID0.1510.20.552=0.37A0552112pIIID0.310.20.552=0.646A0662112pIIID0.668A(6-13)原副边电流有效值为SDTSSdttDTIITI021min11)(1)31(211121IIIIDPP1I1I'1IP1I)a(2I2I'2IP2I)b(图6-2储能变压器原副边电感电流波形2210.45(0.2780.2780.0760.076)0.163A(6-14)2222235222211(1)()0.550.370.370.20.233PPIIIDIIII=0.2A5I)31)(1(255525IIIIDPP=0.41A6I)31)(1(266626IIIIDPP=0.3A(7)确定原副边导线线径和股数取导线电流密度2/400cmAj,根据jIS可得,原副边导线截面积为210.0004Scm,22340.0005SSScm,250.001025Scm,260.00075Scm,考虑到高频集肤效应,开关频率为kHzFs100时,铜导线的穿透深度△为mm2078.0101058104100222367(6-16)因此所选线径不能超过mm4157.0,选用0.21dmm的导线,其截面积为0.0347mm2,1N并绕根数=0.04/0.0347=1.15根,取1根;234NNN,并绕根数=0.05/0.0347=1.44根,取2根;5N并绕根数=0.1025/0.0347=2.9根,取3根;6N并绕根数=0.075/0.0347=2.2根,取2根(8)校核窗口系数10110.0347320320.034736130.034736120.034740118.65iiiSNKQ=0.210.3采用分层绕组绕制,订做4个
本文标题:电气性能参数
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