滤波器设计资料.docx
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滤波器设计资料.docx
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滤波器设计资料
李建昌于05-25-1999未校對
(1)EMICIRCUIT(EMICIRCUIT如附圖)
A.
(1)常模,雜訊80KHZ截止頻率執行增益衰減取C:
(3300PF)
NOT7:
FO:
CUROFFFREQUENCY
L1=17.8UH→取20UH
SHEETIONTOT=4*8*2TOROIDALCORES,COREMATERIALSELECTIONTO.
TDK→H5AAL=800(NH/N)
1)L1&L2UNDER常模NOISE–GAIN-UNDER–STARTOFFREQUENCY80KHz
2)及可令XC1=0.22uF/250VAC
B.
LINEFILTER為12(MH).CY=3300PF求CUTOFFFREQUENCY
★頻率增加10倍GAINUNDER40(dB).
C.
NOT7:
A.P:
ACROSSAREAPRODUCT
T1:
EE-25*10.LINEFILTER
BOBBIN:
EE-25(YW-020)(臥式)
a.A.P=AE*ACW
=0.40000CM*0.79cm=0.399cm→A.P
b.J=AP.KJ∵0.399*593KJ=593(CORE結構系數60℃)
=237A/cm
SHECTIONTO=27AWG=0.4Φ
d.COREMATERIAL
TDK→H5ATOKIN→5000HTONMTA→2D3
BMS=4100(60℃)B.R=1000(60℃)
B=4100-1000=31003100(G)=0.31(TEALSE)可利用之Fluxdensity
B1=1/2△B=1550(G)=0.155(TESLA)
BOBBINA(CW)=4.5*4.75=21.375CMM=0.213CM
BOBBIN=1.213CM使用0.4Φ,可以滿110TURN
令所須L值12MHT=1000*1200UH/3300≒60.3T→62T
12MH之造成能量
W=1/2LI=1/212*10H8(0.31)=1/212000*10UH*(310MA)=0.576UJ
f.EE-25COLEH7A所能佔者存之能量:
故EE-25CORE所能存於之能量於60℃時=2.576UJ
電路之能量=0.5UJ可接受
R4:
為XCAPACITOR電容器放電路往之用
依據VED–0806與IEC-380之Discharge放電R4可由下式求得
R=T/2.21C
令C1=0.22UFC2=0.1UFC=0.22UF+0.1UF=0.32UF
R4→1.5MΩ/1/4W
(─)輸入電流濾波電路(如附圖)
1)設計以下各COMPONENT規格值F1,TR1,BD1,C5-C6,R1-R2
POUT=50WEFF.=70%PIN=50W/0.7=71.42W
2)WORSTCASEUSEDWITH230VAC50HZ+-3HZ(47HZ-53HZ)之條件
1)WIN=PIN/F=71.42/50HZ=1.04284JOULES(WATTED–SECONDS)
WORSTCASEUSED:
110VAC60HZ+-3HZ(57HZ-63HZ)
2)WIN=PIN/F=71.42/60HZ=1.19JOULES(WATTED–SECONDS)
3)FOR230VAC(50HZ)BRIGEFULL–WAVEOPERATION:
WIN/2=1/2CIN(VPK–VMIN)
因FOR230VACOPERATIONRANGEFROM180VACTO264VAC所其方程式
如方程式程
(1)
a.CIN=1.04284*10JULES/380(V)-204(V)=53.62*10UF取68UF或50(SDT)
b.CHARGINGPULESWIDTHFROMEQUATION:
TC=2πF/cos(Vimin/Vimax)
令F:
50HZcos90∘=1VI(min)=180AC(V)VI(max)=264VAC
PEAKCHARINGCAMENTFPOW
EQUEATIONICHG=C(VMAX-VIMIN)
TC
令C=53.62*10FVMAX=264VACVIMIN=180VACTC=2.164MS
CHARGINGPEAKCURRENT
c.RMSCHARGINGCURRENTFROMEQUATIONAL:
TC2F=2.614*10*2*50=0.2164A
ICHG=ICHG-IPK=ICHGTC/T-ICHG(TC2/T)
ICHG=ICHGTC.2F-(TC2F)
ICHG=2.0820.2164-(0.2164)=0.858A
(三)FORVOLTAGEDOUBLEROPERATION115V(60HZ)LINE:
1)
W/2=1/2C1(VCPK-VCMIN)
NOTCINTHESERIESCAMBINATIONOFC1ANDC2EQUALS68UFOR50UF
2)CHARGINGPULESWIDTHFROMEQUATIONAL=VA=VCIPKCOS(2πftc)
令π=3.1416COS90=1
3)CHARGINGPEAKCARRENT△Q=ICHG△T=C△VICHG=C(VPK-VMIN)/TC
ICHG=127(132-90)/1.806*10=2.953A
4)RMSCARRENTINEACHCAPCACITORIS:
ICHG=IPKCHGtcf-tcf
TCF=1.806*10*60=0.108
ICHG=2.9530.108-(0.108)=0.9165A
(此電流值,亦流經Q1(MOSFET))
(四)
1)P=E.I△I=71.5/320V=0.22A
C=△I/△VdtC=INPUTFILTERCAPACITOR
dt=ACLINEDUTYCYCLE*1/2=8.3MS
C=0.22/△30*8.3*10(S)=60UF→取68UFSTDPRODUCT
2)耐壓值=INPUT90AC*2*1.2(dEC)=152VDC
115VAC*2*1.2(dEC)=195VDC
132VAC*2*1.2(dEC)=223VDC
耐壓值變動RAMG152VDC–223VDC
取200WV其可耐壓之範圍200WV*1.2(dEC)=240WV
(五)HOLE–UP–TIME之考量:
T=V(IN)-VC(SDTLEVEL)/IAC)*C
(六)
1)TR1:
限制於瞬間開機(POWER,ON)時所產生之INRUSHCARRENT,當無
TR1時所產生之INRUSHCARRENT為如下所示:
(若以115VAC之考慮對象)則
如下方程式所述:
I.(INRUSHCARENT)=VMAX*J2/RI
令
(1)VMAX132
(2)RI=WIRERESISTOR+CAPACITOR(ESR)
=WIRERESISTOR≒1Ω
=CAPACITORESR≒0.12Ω
(ESR之產生是於INRUSHCHANGECURRENTTC該時間非50HZ及60HZ)
詳細請參考OSCILLORDESIGERSEMINAR)
II.(INRUSHCARRENT)=132*2/1.12Ω=166.65(A)
166.645A瞬間之產生.極可能破壞切換開關或POWERMOSFET
2)令LY-88S.P.SINRUSHCARRENT低於25A(P-PK)則如下所示:
備註:
是必須考所使用之TRANSISTOR之瞬間所承受之瞬間電流量而定.,非某一特定值
R(電阻值)=132*2/25A=7.46Ω
I(電流值)=ICAGTC.F-TCFTC.F=1.086*10(S)*60(HZ)
=2.953A0.108-(0.108)=0.108
=0.9165A-取DOUBLER(2A)=IPKCHG=2.953A
故TR1取RATING2A/7Ω
(七)R1RT2為平衡電阻)
1)目的:
取得C1,C2所CHARGE之能量
取得C1,C2之平滑VCC電壓
2)FORTHE(FULLWACVE)115VAC
CHARGETIME+DISCHARGETIME=16.6MS
VC(NOM)=VC(MIN){1-(EXP-T/R.C)}
VC(NOM)=85V(MIN){1-(EXP-16.6MS/100*10*R)
R2=R1=160K
功率LOSS=(187)/160K=0.1(W)
FORTHE(FULLWAVE)230VAC:
CHARGE+DISCHARGE=20MS
V(NOM)=VC(MIN){1-(EXP-I/R*C)}
286(V)=254(V){1-(EXP-I/R*C)}
R2=R1=156K
功率LOSS=(202)/156K=6.25(W)
(八)
1)
ITEM1115V230V
DOUBLERBRIDGE
RMSLINEVOLTAGE(VAC)90V-132V180V-264VAC
PEAKLINEVOLTAGE(VRK)127V-186(V)254V-373.2(V)
INPUTCAPACITOR,CIN63.5UF53.6UF
DOUBLERCAPACITOR,C1C2127UF104UF
CHARGETIME,TC1.086US2.164MS
PEAKCHARGECARRENT,ICHATPK2.953A2.081A
RMSACCHARGECARRENTICHG0.9165A0.858A
2)
1.F1→1.5A/250VAC*1
2.TR1→2A/7Ω*1
3.D1–D4→1.5A/400V*4
4.C1–C2→100UF/200V*2
5.R1,R2→160K/1/2W*2
(A)計算+5V+12V–12(V)共同之CHOKE
條牛如下:
(電路附圖)
a.+5v→–4A(MAX)0.2(MIN)RMAX=25ΩRMIN=1.25Ω
△I=1A=25%
a.+12v→2A(MAX),0.2A(MIN),RMAX=60Ω,RMIN=6Ω
△I=0.5A=25%
c.-12v→0.6A(MAX)0.1A(MIN)RMAX=120ΩRMIN=20Ω△I=0.15A
d.D(MAX)=0.360(MIN)=0.21/F=TS=10*10(S)△I=25%=0.25
NOT1D(MIN)=VIN(MIN).DMAX/VIN(MAX)=214*0.36/404=0.2(US)
NOT2DOFF=(1-0.2)/FS=0.8/100*10=8(US)
NOT3△I=IO(MAX)*0.25例+5V
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