Kev daws teeb meem nrog kev tsim ntawm DC tswj fais fab mov
Tsim ntawm DC Stabilized Power Supply
Kev tsim ntawm peb-theem rectifier transformer muaj xws li: hom kev sib txuas ntawm lub hauv paus thiab theem nrab windings, kev suav ntawm qhov nruab nrab sab nruab nrab, kev suav ntawm thawj thiab theem nrab tam sim no, kev suav thiab kev txiav txim siab ntawm lub peev xwm, thiab kev xaiv ntawm tus qauv qauv. Ntawm lawv, hom kev sib txuas ntawm thawj thiab theem nrab windings thiab kev txiav txim siab ntawm qhov nruab nrab sab voltage yog cov ntsiab lus ntawm peb qhov kev ntsuam xyuas tseem ceeb. Kab lus no yuav siv qhov tsim ntawm peb DC fais fab khoom siv ntawm tus tsav tsheb stepper tsav ua piv txwv los qhia kom meej.
Kev txiav txim siab ntawm qhov nruab nrab sab voltage
Qhov thib ob qhov hluav taws xob tsis yog tsuas yog cuam tshuam nrog lub load voltage (uas yog, DC tswj fais fab mov voltage yuav tsum tau tsim) thiab rectifier Circuit Court, tab sis kuj muaj feem xyuam rau lub voltage stabilizing ntaus ntawv. Rau tus choj rectifier Circuit Court nrog cov kev xav tau siab, siv cov lim capacitor kom ruaj khov rau qhov voltage thiab stabilize qhov hluav taws xob nrog lub zog stabilizer. Rau cov uas tsis tshua muaj kev xav tau, koj tsis tuaj yeem stabilize qhov voltage lossis siv cov capacitors kom stabilize qhov voltage. Raws li pom nyob rau hauv daim duab 1, ntxiv rau 7V qis-voltage tsav yog tsuas yog siv rau theem-xauv. Nws tam sim no me me thiab voltage yog tsawg. Hom fais fab mov thiab siab zaus, loj tam sim no thiab tam sim no hloov pauv tus nqi yuav ua rau siab overvoltage, yog li electrolytic capacitors yuav tsum tau siv los tswj qhov voltage thiab resistors kom txwv tam sim no; ntxiv rau 12V yog siv rau cov khoom siv hluav taws xob ntawm cov khoos phis tawj thiab kev sib txuas ua ke, nrog rau cov tam sim no me me thiab tsis tshua muaj hluav taws xob. Txawm li cas los xij, yuav tsum muaj qhov ruaj khov voltage thiab me me ripple coefficient, yog li cov capacitors thiab peb-terminal regulators yog siv los stabilize qhov voltage hauv ob theem. Rau qhov sib txawv voltage stabilization txoj kev, theem nrab voltage muaj ntau txoj kev txiav txim siab. Hauv txoj kev xav, cov qauv kev suav ntawm peb qhov voltages yog tib yam, uas yog, U2=Ud/2.34 lossis UL=Ud/1.35, thiab suav peb qhov voltages theem nrab Cov voltages yog: 5.2V, 81.5V thiab 8.9V, tab sis cov txiaj ntsig ntawm cov kev suav no tsis haum rau kev xyaum. Yog li ntawd, qee qhov yuav tsum tau txiav txim siab los ntawm cov qauv kev kwv yees engineering. Piv txwv li, peb-theem irreversible rectification system feem ntau siv cov qauv UL=({{20}}.9 ~ 1.{{30}}) ·Ud kwv yees , yog DC sab yog lim los ntawm electrolytic capacitor, qhov nruab nrab tus nqi ntawm cov zis yuav nce, uas feem ntau kwv yees los ntawm cov mis UL=Ud/2½; Yog hais tias lub DC sab yog stabilized los ntawm ib tug capacitor thiab ib tug peb-terminal voltage regulator, thiaj li yuav nthuav cov stability Voltage range, Ud feem ntau yuav tsum tau nce los ntawm 3 ~ 6V, thiab ces kwv yees los ntawm cov mis UL=({ {42}}.9 ~ 1.0) · Ud. Peb qhov hluav taws xob theem nrab yog li txiav txim siab yog: UL7=0.9 ×7=6.3V, UL110=110/2½=78V, UL12=16 × 0. {43}}.4V.
1. Qhov thib ob piv txwv tam sim no suav thiab kev txiav txim siab muaj peev xwm
Qhov thib ob tam sim no yuav tsum tau txiav txim siab raws li qhov loj ntawm lub load tam sim no thiab lub rectifier Circuit Court. Nyob rau hauv daim duab 1, peb-theem choj rectifier Circuit Court yog siv, thiab cov txiaj ntsig zoo ntawm peb theem nrab tam sim no tau txais los ntawm kev siv cov qauv I2=(2/3)½Id: 3.26 A, 6.5A, 1.63A , koj tau txais 3 theem nrab voltages thiab tam sim no. Raws li lub hauv paus ntsiab lus hais tias lub zog thawj thiab theem nrab ntawm transformer yog kwv yees li qhov sib npaug, thawj qhov tam sim no I1=1.45A tuaj yeem tau, lub peev xwm ntawm transformer yog S=953VA, thiab cov qauv transformer yog xaiv raws li 1.5kVA.
1. Kev txiav txim siab ntawm hom kev sib txuas ntawm qhov thib ob winding
Peb-theem transformer windings tuaj yeem txuas nrog lub hnub qub lossis delta zoo li xav tau. Peb-theem rectification circuits feem ntau yog siv rau high-power rectification (uas yog, lub hwj chim load yog siab tshaj 4kW), thiab cov transformers feem ntau txuas rau ob hom: Y / Δ thiab Δ / Y. Kev sib txuas Δ / Y tuaj yeem ua rau cov kab hluav taws xob tam sim no muaj ob kauj ruam, uas yog ze rau ntawm sine yoj, thiab kev sib haum xeeb me me, thiab kev siv hluav taws xob tswj tau ntau dua; Y / Δ kev sib txuas tuaj yeem muab ib-theem AC lub zog, txo qhov thib ob Winding tam sim no feem ntau yog siv rau hauv high-power diode rectifier circuits; rau me me-fais fab peb-theem transformers, nws yog qee zaum txuas rau hauv Y / Y hom, txawm hais tias txoj kev sib txuas no yuav qhia txog kev sib haum xeeb rau daim phiaj hluav taws xob. Tab sis tom qab tag nrho, nws lub zog me me thiab nws qhov cuam tshuam me me. Hauv luv luv, thaum xaiv, peb yuav tsum tsis tsuas yog xav txog qhov cuam tshuam ntawm daim phiaj hluav taws xob, tab sis kuj txo qis qhov winding tam sim no thiab txo cov cua ntsawj ntshab theem. Nyob rau hauv daim duab 1, 7V thiab 12V tam sim no kuj me me, qhov hluav taws xob tsawg, thiab txoj kev sib txuas hnub qub raug xaiv; 110V tam sim no loj, thiab qhov hluav taws xob tsis siab dhau, thiab txoj kev sib txuas Δ-shaped yog xaiv, uas tuaj yeem txo qhov tam sim no hauv winding, txo txoj kab uas hla ntawm winding hlau, thiab txuas qhov ntev ntawm winding. Kev pab lub neej; Txawm hais tias cov kab hluav taws xob ntawm cov thawj winding yog siab (380V), lub peev xwm transformer tsuas yog 2kW, thiab cov thawj tam sim no yog 1.45A, yog li lub hnub qub kev sib txuas txoj kev tuaj yeem txo qhov voltage ntawm winding thiab rwb thaiv tsev ntawm winding.
Rectifier Circuit Court tsim
Peb-theem rectifier Circuit Court feem ntau muaj peb-theem ib nrab-yoj rectifier circuit thiab peb-theem choj rectifier circuit. Txij li thaum cov zis nruab nrab voltage ntawm peb-theem choj rectifier Circuit Court yog siab, qhov voltage ripple me me, thiab qhov zoo tshaj plaws yog siab, tus choj rectifier Circuit Court feem ntau siv. Kev xaiv ntawm hom diode ntawm tus choj caj npab yog txiav txim siab los ntawm nws qhov ntsuas hluav taws xob thiab ntsuas tam sim no, thiab qhov ntsuas tam sim no thiab qhov hluav taws xob yog txiav txim siab los ntawm qhov nruab nrab load tam sim no thiab voltage. Cov mis laij lej yog: ID=(1/3)½·Id, ID(AV)=ID / 1.57, UDn=(1 ~ 2) 2½·U2, tus qauv ntawm lub rectifier tuaj yeem txiav txim siab los ntawm kev txheeb xyuas phau ntawv diode nrog ID (AV) thiab UDn.
Tsim kev lim dej thiab voltage stabilizing circuit
1), lim Circuit Court thiab xaiv ntaus ntawv
Lub rectifier lim Circuit Court feem ntau muaj lim circuits xws li capacitors, inductors, thiab RC. Inductive filtering yog paub los ntawm kev siv cov inductance los tsim counter electromotive quab yuam rau lub pulsating tam sim no thiab cuam tshuam qhov kev hloov tam sim no. Qhov loj dua qhov inductance, qhov zoo dua qhov kev lim dej. Nws feem ntau yog siv nyob rau hauv qhov chaw uas lub load tam sim no loj thiab cov kev xav tau lim tsis siab. RC lim Circuit Court yog lub lim dej siv los ntawm kev sib txuas cov resistors thiab capacitors. Txij li thaum lub resistor yuav txo ib feem ntawm DC voltage, DC tso zis voltage yuav txo, yog li nws tsuas yog haum rau me me tam sim no circuits. Capacitor filtering yog siv cov kev them nqi thiab tawm cov nyhuv ntawm lub capacitor los ua kom cov zis voltage ruaj khov, thiab qhov voltage amplitude nce, cov nyhuv filtering yog zoo, thiab nws yog haum rau ntau yam rectifying circuits. Kev xaiv ntawm lub lim capacitor feem ntau yog kev txiav txim siab ntawm hom, muaj peev xwm thiab tiv taus tus nqi hluav taws xob. Feem ntau siv rectifier lim capacitors suav nrog txhuas electrolytic, tantalum electrolytic, polyester, thiab monolithic capacitors. Aluminium electrolytic capacitors muaj cov xau loj tam sim no, tsis tshua muaj hluav taws xob thiab kev ua haujlwm kub (txog li 70 degree), tab sis muaj peev xwm loj; tantalum electrolytic capacitors muaj me me tam sim no, siab zog tiv taus thiab kev khiav hauj lwm kub dua li txhuas electrolytic capacitors, thiab feem ntau yog siv rau ntau dua qhov chaw; polyester capacitors muaj cov rwb thaiv tsev loj, tsis muaj kev poob qis, kev khiav hauj lwm kub (txog li 55 degree), muaj peev xwm me me, tab sis siab tiv taus voltage; monolithic capacitors tuaj yeem ua rau me me thiab siab nyob rau hauv qhov hluav taws xob. Qhov kev ua tau zoo thiab thermal kev ua tau zoo yog qhov ruaj khov, tab sis lub peev xwm me me. Feem ntau, thaum lub rectified tso zis tam sim no loj, electrolytic capacitors yuav tsum tau siv los lim thiab stabilize qhov voltage; Yog tias cov zis tam sim no me me, cov khoom siv hluav taws xob zoo tib yam lossis electrolytic capacitors tuaj yeem siv rau lim. Yog hais tias lub DC tso zis voltage muaj ripple coefficient yuav tsum tau los yog nyob rau hauv thiaj li yuav tiv thaiv lub high-frequency suab nrov, siv electrolytic capacitors Nws yog zoo dua mus siv nyob rau hauv parallel nrog me me-capacity tsis-polar capacitors: me me-capacity capacitors tuaj yeem lim tawm cov kev txiav txim siab zoo. nyob rau hauv pulsating DC, thiab electrolytic capacitors tuaj yeem lim tawm cov khoom loj-tsawg zaus, thiab qhov voltage stabilization ntau qhov dav thiab cov nyhuv zoo. Lub rectification thiab filtering Circuit Court tsis xav tau ntau lub peev xwm thiab withstand voltage ntawm lub capacitor. Feem ntau, lub peev xwm ntawm lub capacitor yog kwv yees raws li cov zis tam sim no. Yog tias cov zis tam sim no loj, lub peev xwm yuav loj; yog tias qhov tam sim no me me, lub peev xwm yuav me me. Txawm li cas los xij, yog tias lub peev xwm loj dhau, qhov tso zis hluav taws xob tus nqi yuav raug txo, thiab yog tias nws tsawg dhau, qhov voltage ripple yuav loj thiab tsis ruaj khov. Xa mus rau Table 1 txhawm rau txiav txim siab lub peev xwm. Tus nqi hluav taws xob tiv thaiv feem ntau yog 1.5 mus rau 2 npaug ntawm qhov ua haujlwm voltage ntawm qhov txuas txuas.
2), voltage regulator Circuit Court thiab xaiv ntaus ntawv
Muaj ob hom voltage stabilizing circuits: discrete tivthaiv voltage stabilizing Circuit Court thiab integrated voltage stabilizing Circuit Court, uas integrated voltage stabilizing Circuit Court yog tsuas yog siv rau rectifying Circuit Court nrog tsawg voltage thiab me me tam sim no. . Thaum xaiv, koj yuav tsum xub txiav txim siab txog cov koob, seb nws puas yog lub zog zoo lossis lub zog tsis zoo, txawm tias nws tuaj yeem hloov kho lossis kho, thiab tom qab ntawd xaiv cov qauv tshwj xeeb raws li nws qhov ntsuas hluav taws xob thiab ntsuas tam sim no; Nyob rau tib lub sijhawm, thaum lub zog stabilizer txuas nrog lub rectifier Circuit Court, qee cov khoom tiv thaiv, xws li txuas lub diode ntawm I / O davhlau ya nyob twg los tiv thaiv luv luv Circuit Court ntawm input davhlau ya nyob twg, txuas ib lub me me capacitor ntawm lub input davhlau ya nyob twg thiab hauv av, tuaj yeem txwv cov input voltage amplitude, thiab lwm yam.
Kev tsim ntawm DC fais fab mov yog qhov yooj yim hauv txoj kev xav, tab sis kev tshuaj xyuas ntxiv, kev tshawb fawb, kev coj ua thiab cov ntsiab lus xav tau hauv kev tsim engineering tshwj xeeb.
