1、滤波器设计资料李建昌于05-25-1999 未校對 (1) EMI CIRCUIT (EMI CIRCUIT 如附圖)A .(1) 常模,雜訊 80KHZ截止頻率執行增益衰減取C:(3300PF)NOT 7:FO:CUR OFF FREQUENCY L1=17.8UH取20UH SHEETION TO T=4*8*2 TOROIDAL CORES , CORE MATERIAL SELECTION TO. TDKH5A AL =800(NH/N) 1) L1 & L2 UNDER常模 NOISE GAIN-UNDER START OF FREQUENCY 80KHz 2) 及可令XC1= 0.
2、22u F/250VACB . LINE FILTER為12(MH) .CY=3300PF求CUT OFF FREQUENCY 頻率增加10倍 GAIN UNDER 40( dB).C . NOT 7:A.P:ACROSS AREA PRODUCT T1 : EE-25*10. LINE FILTER BOBBIN : EE-25(YW-020)(臥式) a. A.P=AE*ACW =0.40000 CM*0.79cm=0.399cmA.P b. J=AP.KJ 0.399*593 KJ=593(CORE結構系數 60) =237 A/cm SHECTION TO =27AWG=0.4 d.
3、CORE MATERIAL TDKH5A TOKIN5000H TONMTA2D3 BMS=4100(60) B.R=1000(60) B=4100-1000=3100 3100(G)=0.31(TEALSE )可利用之 Flux density B1=1/2B=1550(G)=0.155(TESLA) BOBBIN A (CW) = 4.5*4.75=21.375CM M=0.213CM BOBBIN =1.213CM 使用0.4,可以滿110 TURN 令所須L值12MH T=1000*1200UH/330060.3T 62T 12MH之造成能量 W=1/2L I =1/2 12*10 H
4、8 (0.31) =1/2 12000*10UH*(310MA)=0.576UJf. EE-25 COLE H7A所能佔者存之能量:故EE-25 CORE所能存於之能量於60時=2.576UJ電路之能量=0.5UJ可接受R4:為X CAPACITOR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=0.22UF C2=0.1UF C=0.22UF+0.1UF=0.32UF R41.5M/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-R2POUT
5、=50W EFF.=70% PIN=50W/0.7=71.42W2) WORST CASE USED WITH 230 VAC 50HZ+-3HZ (47HZ-53HZ)之條件1) WIN =PIN/F=71.42/50HZ=1.04284 JOULES (WATTED SECONDS) WORST CASE USED :110VAC 60HZ+-3HZ(57HZ-63HZ)2) WIN=PIN/F=71.42/60HZ=1.19 JOULES (WATTED SECONDS)3) FOR 230VAC(50HZ) BRIGE FULL WAVE OPERATION :WIN/2=1/2CIN
6、 (VPK VMIN) 因FOR 230VAC OPERATION RANGE FROM 180VAC TO 264VAC 所其方程式 如方程式程(1)a. CIN=1.04284*10 JULES/380(V)-204(V)=53.62*10UF取68UF或 50 (SDT)b. CHARGING PULES WIDTH FROM EQUATION : TC=2F/ cos(Vi min/Vi max)令 F:50HZ cos 90 =1 VI(min)=180 AC(V) VI(max)=264 VACPEAK CHARING CAMENT FPOWEQUEATION ICHG=C(VMA
7、X-VIMIN) TC令C=53.62*10 F VMAX=264VAC VIMIN=180VAC TC=2.164MSCHARGING PEAK CURRENT c. RMS CHARGING CURRENT FROM EQUATIONAL : TC2F=2.614*10 *2* 50=0.2164AICHG=ICHG-IPK=ICHG TC/T-ICHG (TC 2/T)ICHG=ICHG TC.2F-(TC2F)ICHG=2.082 0.2164-(0.2164)=0.858A(三)FOR VOLTAGE DOUBLER OPERATION 115V(60HZ) LINE:1) W/2
8、= 1/2 C1 (VCPK-VCMIN) NOT CIN THE SERIES CAMBINATION OF C1 AND C2 EQUALS 68UF OR 50UF2) CHARGING PULES WIDTH FROM EQUATIONAL = VA =VCIPK COS (2 ftc) 令=3.1416 COS 90=1 3) CHARGING PEAK CARRENT Q=ICHGT=CV ICHG=C(VPK-VMIN)/TCICHG=127(132-90)/1.806*10=2.953A4) RMS CARRENT IN EACH CAPCACITOR IS :ICHG =IP
9、KCHG tcf-tcfTCF=1.806*10 *60=0.108ICHG=2.953 0.108-(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/V dt C=INPUT FILTER CAPACITOR dt=AC LINE DUTY CYCLE *1/2=8.3MSC=0.22/30*8.3*10(S)=60UF取68UF STD PRODUCT 2)耐壓值=INPUT 90AC* 2*1.2(dEC)=152VDC 115VAC*2*1.2(dEC)=195VDC 132VAC *2 *1.2(d
10、EC)=223VDC 耐壓值變動RAMG 152 VDC 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(SDT LEVEL)/IAC) *C (六) 1)TR1:限制於瞬間開機(POWER,ON)時所產生之 INRUSH CARRENT,當無 TR1時所產生之INRUSH CARRENT 為如下所示:(若以115VAC之考慮對象)則 如下方程式所述: I. ( INRUSH CARENT )=VMAX*J2/RI 令(1)VMAX 132 (2)RI=WIRE RESISTOR + CAPACIT
11、OR (ESR) =WIRE RESISTOR1 =CAPACITOR ESR 0.12 (ESR 之產生是於INRUSH CHANGE CURRENT TC 該時間 非50HZ及60HZ) 詳細請參考 OSCILLOR DESIGER SEMINAR ) II. (INRUSH CARRENT)=132*2/1.12=166.65(A) 166.645A瞬間之產生.極可能破壞切換開關或POWER MOSFET 2)令LY-88 S.P.S INRUSH CARRENT 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
12、R(電阻值)=132*2/25A=7.46 I(電流值)=ICAG TC.F-TCF TC.F=1.086*10 (S)*60(HZ) =2.953A 0.108-(0.108) =0.108 =0.9165A- 取DOUBLER(2A) =IPKCHG=2.953A 故TR1 取 RATING 2A /7 (七)R1 RT2 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) FOR THE (FULL WACVE )115VACCHARGE TIME +DISCHARGE TIME =16.6MSVC (NOM)=VC (MIN)1-(E
13、XP-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)FOR THE (FULL WAVE ) 230VAC :CHARGE +DISCHARGE=20MSV (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)ITEM 1115V 230V DOUBLER BRIDGERMS LINE VOLTAGE (VAC) 9 0V-132V 180V-264
14、VACPEAK LINE VOLTAGE (VRK) 127V-186(V) 254V-373.2(V)INPUT CAPACITOR, CIN 63.5UF 53.6UFDOUBLER CAPACITOR, C1 C2 127UF 104UFCHARGE TIME ,TC 1.086US 2.164MSPEAK CHARGE CARRENT,ICHATPK 2.953A 2.081ARMS AC CHARGE CARRENT ICHG 0.9165A 0.858A2) 1. F1 1.5A/250VAC*12. TR1 2A/7*13. D1 D4 1.5A/400V*44. C1 C2 1
15、00UF/200V*25. 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=25 RMIN=1.25 I=1A=25%a. +12v 2A(MAX) , 0.2A(MIN) ,RMAX=60 ,RMIN=6 I=0.5A=25%c. -12v 0.6A(MAX) 0.1A(MIN) RMAX=120 RMIN=20 I=0.15Ad. D (MAX)=0.36 0(MIN)=0.2 1/F=TS=10*10 (S) I=25%=0.25NOT1 D(MIN)=VIN(MIN).DMAX/VIN(MAX)=214*0.36/404=0.2(US)NOT2 DOFF=(1-0.2)/FS=0.8/100*10=8(US)NOT3 I=IO(MAX)*0.25 例+5V
copyright@ 2008-2022 冰豆网网站版权所有
经营许可证编号:鄂ICP备2022015515号-1