Hub Switching Power Supply Circuit Diagram
Raws li pom nyob rau hauv daim duab, cov nqi hluav taws xob siv hluav taws xob los ntawm C1, NF1 thiab lwm yam khoom ntawm lub lim network los lim tawm cov clutter siab, ntxiv rau tag nrho-bridge Circuit Court tsim ntawm D1 thiab D4. Rectified DC pulsating voltage lim los ntawm c2, txog 300V DC voltage ntawm ob qho kawg ntawm c2, qhov voltage tag nrho txoj kev los ntawm kev hloov pauv hloov T1 (1)-(2) winding ntxiv rau lub raj hloov Q1 D-ncej, lwm txoj kev los ntawm tus pib resistor R2 ntxiv rau U1 (KA3842AN) ntawm (7) ko taw, thaum them lub C7, thaum lub charger voltage ntawm lub C7 ntawm lub siab tshaj los yog sib npaug rau 12V, lub U1 sab hauv 5V siv voltage yog tsim thiab oscillator pib ua hauj lwm.
R6, c4 rau lub oscillator sab nraud Rc lub sijhawm, nws cov kev txwv txiav txim siab oscillation zaus ntawm U1. (4) ko taw ntawm sawtooth yoj amplified los ntawm lub sab hauv shaping, los ntawm (6) ko taw ntawm U1 tso zis lub luag hauj lwm voj voog adjustable excitation mem tes, ua ke los ntawm R4, D6, ntxiv rau G-ncej ntawm Q1. Q1 ntws tam sim no ID ~ s los ntawm T1 (1) a (2) winding electromagnetic induction, ua ke los ntawm T1, los ntawm T1 (3) a (4) winding induced mem tes voltage, rectified los ntawm D9, R13 tam sim no limiting, c7 filtering yog kuj ntxiv rau (7) ko taw ntawm u1, muab u1 nrog rau kev khiav hauj lwm voltage yuav tsum tau rau ib txwm ua hauj lwm, u1 mus rau hauv ib txwm ua hauj lwm. xeev.
Voltage regulator Circuit Court
Lub voltage regulator Circuit Court feem ntau yog tsim los ntawm U2 (PC817), U3 (KA431) thiab u1 (2) ko taw ib feem ntawm lub circuit. Vim tias lub zog tseem ceeb ntawm lub hub yog 3.3v fais fab mov.
Yog li ntawd, qhov ntsuas qhov ntsuas hluav taws xob tau txais los ntawm 3.3V cov zis ntawm lub zog hloov hluav taws xob. Thaum qhov hluav taws xob hluav taws xob nce los yog thaum lub nra hnyav dua, qhov tso zis hluav taws xob yog khi kom nce. 3.3V los ntawm R16 rau U2's (1) a (2) ko taw ntawm qhov hluav taws xob kuj nce, u3's (3) taw ntawm qhov muaj peev xwm nce, vim qhov tseeb regulator u3's (1) ko taw ntawm qhov voltage yog tas li, yog li qhov kev hloov no thaum kawg ua rau qhov ntws los ntawm u2's (1) a (2) taw ntawm qhov tam sim no nce, lub teeb pom kev sab hauv lub teeb pom kev hauv lub u2 ci ntsa iab, kom lub (4) a (3) taw ntawm qhov tsis kam sab hauv, u1 ( 4) a (3) taw ntawm qhov kev tiv thaiv sab hauv txo qis, u1 (4) a (3) taw ntawm kev tiv thaiv sab hauv nce, u1 (3) taw ntawm kev tiv thaiv sab hauv txo, u1 (3) ko taw ntawm kev tiv thaiv sab hauv txo, u1 (3) ko taw ntawm kev tiv thaiv sab hauv txo qis, u1 (4) taw ntawm qhov kev tiv thaiv sab hauv txo, u1 (3) taw ntawm kev tiv thaiv sab hauv nce. Internal tsis kam txo, u1's (8) feet 5v siv voltage los ntawm u2's (4) a (3) ko taw rau u1's (2) ko taw ntawm qhov voltage nce, thaum qhov voltage ntau dua los yog sib npaug rau 2.5v sab hauv trigger flip-flop ua ntej . Tom qab kev tswj hwm sab hauv, lub voj voog ua haujlwm ntawm cov zis mem tes ntawm (6) ko taw ntawm u1 txo qis, Q1 raws sij hawm luv luv, thiab T1 lub zog cia txo. Cov zis voltage ntawm switching fais fab mov txo; conversely, cov txheej txheem tswj yog qhov opposite ntawm cov saum toj no. Yog li, tag nrho cov khoom siv hluav taws xob hloov pauv ua haujlwm nyob rau hauv kev tswj hwm qhov hluav taws xob tswj lub xeev.
Kev tiv thaiv Circuit Court
NT1 yog qhov ntsuas kub tsis zoo coefficient thermistor, uas tuaj yeem cuam tshuam qhov cuam tshuam tam sim no ntawm cov hluav taws xob rectifier Circuit Court ntawm lub zog hloov hluav taws xob thaum lub sijhawm ua kom muaj zog, thiab tiv thaiv D1-D1 los ntawm qhov hluav taws xob tam sim no.
VR2 yog ib qho kev tiv thaiv tshaj-voltage varistor. VR2 yog ib qho kev tiv thaiv tshaj-voltage varistor, uas tuaj yeem nqus tau cov mem tes sai sai ntawm cov hluav taws xob siab hauv cov khoom siv hluav taws xob, thiab R3, c3 thiab D7 yog qhov sib nqus pulse nqus tes hauj lwm. R12 yog qhov txwv tam sim no ntawm Q1, thaum lub zog hloov hluav taws xob ntau dhau, qhov ntws tam sim no Id-s ntawm Q1 yog khi kom nce, thiab qhov hluav taws xob poob ntawm R12 nce, thiab qhov hluav taws xob ntxiv rau (3) ko taw ntawm u1 los ntawm R7 kuj nce. Thaum qhov hluav taws xob ntawm qhov taw no Ntau dua lossis sib npaug rau 1v, U1 sab hauv tam sim no sib piv ua rau flip-flop. Kev quab yuam kaw nws (6) taw ntawm cov khoom siv mem tes, Q1 txiav tawm sai sai, yog li zam Q1 los ntawm kev puas tsuaj overcurrent.
Hauv kev hloov hluav taws xob hloov hluav taws xob muaj kev tiv thaiv overvoltage Circuit Court los ntawm ZD1, Q2, Q3 thiab lwm yam khoom. Thaum lub zog hloov hluav taws xob tso tawm qhov hluav taws xob hloov pauv hloov pauv hloov pauv siab, ZD1 ncej luv luv rau hauv av, Q3 qhov kev coj tsis zoo vim yog B-ncej muaj peev xwm rub-down. Cov lus pom zoo no. Thiab ua 02 ntxiv saturation conduction. Yog li ntawd, 02, Q3 Circuit Court yog sib npaug rau unidirectional silicon tswj Circuit Court. Ib zaug ua rau conduction yuav nyob rau hauv ib lub xeev xauv, kom txog rau thaum lub hwj chim tsis ua hauj lwm rau recharge. q2 conduction, R201 yuav u2 (2) ko taw voltage ncaj qha luv luv rau hauv av, tswj los ntawm u2, u1, kom lub zog hloov pauv sai sai txiav tawm.
