Txoj kev txhim kho kev ntseeg tau ntawm kev hloov hluav taws xob

Ob qhov zoo uas yog qhov tseem ceeb rau qhov zoo ntawm cov khoom siv hluav taws xob - technical thiab kev ntseeg tau. Raws li cov khoom siv hluav taws xob muaj kev vam meej, cov qib kev ua tiav ntawm ob qho tib si cuam tshuam rau cov khoom zoo. Raws li ib qho tseem ceeb ntawm cov khoom siv hluav taws xob, kev ntseeg siab ntawm lub zog hluav taws xob txiav txim siab kev nyab xeeb ntawm tag nrho cov system. Hloov cov khoom siv hluav taws xob tau siv dav hauv ntau qhov chaw vim lawv qhov me me thiab ua haujlwm siab. Txawm li cas los xij, yuav ua li cas txhawm rau txhim kho kev ntseeg tau ntawm kev hloov cov khoom siv hluav taws xob yog lub tshuab hluav taws xob hluav taws xob. Ib qho kev hloov pauv tseem ceeb hauv kev sib tw.

1. Electromagnetic compatibility (EMC) tsim tshuab

Cov khoom siv hluav taws xob hloov pauv feem ntau siv cov tshuab pulse width modulation (PWM) . Lub pulse waveform yog duab plaub, thiab nws qhov nce thiab ntog npoo muaj ntau cov khoom sib haum xeeb. Tsis tas li ntawd, qhov rov qab rov qab ntawm qhov tso zis rectifier kuj tseem ua rau muaj kev cuam tshuam electromagnetic (EMI), uas yog lub zog. Cov yam ntxwv tsis zoo ntawm kev ntseeg siab ua rau electromagnetic compatibility ntawm qhov system yog ib qho teeb meem tseem ceeb. Muaj peb yam tsim nyog rau kev tsim hluav taws xob cuam tshuam: cuam tshuam qhov chaw, qhov nruab nrab kis tau tus mob, rhiab tau txais, thiab EMC tsim yog los rhuav tshem ib qho ntawm peb yam mob.

Rau cov khoom siv hluav taws xob hloov pauv, qhov cuam tshuam qhov cuam tshuam feem ntau yog suppressed, thiab qhov cuam tshuam qhov chaw yog concentrated nyob rau hauv switching circuit thiab cov zis rectifier circuit. Cov thev naus laus zis siv suav nrog kev siv tshuab lim dej, kev teeb tsa thiab kev siv thev naus laus zis, thev naus laus zis tiv thaiv, thev naus laus zis hauv av, thiab tshuab sealing.

2, cov khoom siv fais fab kev ntseeg tau thermal tsim tshuab

Cov kws tshaj lij tau taw qhia tias ntxiv rau qhov kev ntxhov siab ntawm hluav taws xob, qhov kub thiab txias yog ib qho tseem ceeb tshaj plaws cuam tshuam rau kev ntseeg ntawm cov khoom siv. Kev txheeb xyuas qhia tau tias txhua txhua 2 degree nce hauv qhov kub thiab txias ntawm cov khoom siv hluav taws xob, qhov kev ntseeg tau txo qis los ntawm 10; Thaum qhov kub siab tshaj 50 degree, lub neej nce tsuas yog 25 1/6 ntawm degree . Vim muaj kev cuam tshuam ntawm qhov kub thiab txias, nws yog ib qho tsim nyog yuav tsum tau siv cov kev ntsuas los txwv qhov kub thiab txias ntawm lub chassis thiab cov khoom siv - thermal tsim. Lub hauv paus ntsiab lus ntawm kev tsim thermal yog los txo cov cua sov tsim, uas yog, xaiv cov kev tswj kom zoo dua qub thiab cov thev naus laus zis, xws li kev hloov pauv hloov tshuab, synchronous rectification technology, thiab lwm yam, ntxiv rau, xaiv cov khoom siv hluav taws xob tsawg, txo tus lej. ntawm cov khoom siv hluav taws xob tsim hluav taws xob, thiab nce qhov dav ntawm txoj kab ntxhib ua rau kom muaj txiaj ntsig ntawm cov khoom siv hluav taws xob. Qhov thib ob yog los txhim kho cov cua sov dissipation, uas yog, kev siv cov conduction, hluav taws xob, convection thev naus laus zis los hloov cov cua sov, suav nrog kev tsim hluav taws xob, cua txias (natural convection thiab yuam cua txias) tsim, kua txias (dej, roj) tsim, thermoelectric cua txias tsim, cua sov yeeb nkab Tsim thiab lwm yam. Kev quab yuam cua txias cua sov dissipation yog ntau tshaj kaum lub sij hawm loj dua ntuj cua txias, tab sis nws yog ib qho tsim nyog yuav tsum tau nce lub kiv cua, kiv cua fais fab mov, interlocking ntaus ntawv, thiab lwm yam. Nyob rau hauv tus tsim, lub tshav kub dissipation txoj kev yuav tsum tau xaiv raws li qhov tseeb qhov teeb meem.

3. Hloov cov khoom siv hluav taws xob kev ntseeg siab engineering tsim tshuab

Rau lub hwj chim kho tshuab, nws yog tshwj xeeb tshaj yog hais tias lub harmonic tam sim no ntawm switching fais fab mov pollutes lub hwj chim daim phiaj thiab cuam tshuam nrog rau lwm yam khoom siv network, uas tej zaum yuav ua rau lub nruab nrab tam sim no ntawm peb-theem plaub-xaim system yuav loj heev. , ua rau muaj kev huam yuaj. Qhov kev daws teeb meem dav dav yog los txais yuav Switching fais fab mov nrog fais fab kev kho tshuab.

Nyob rau hauv cov nqe lus ntawm kev tiv thaiv circuits, thiaj li yuav ua rau lub hwj chim mov ua hauj lwm ntseeg tau nyob rau hauv ntau yam hnyav ib puag ncig, ntau yam kev tiv thaiv circuits xws li surge tiv thaiv, overvoltage thiab undervoltage, overload, luv Circuit Court, thiab overheating yuav tsum tau ntxiv thaum lub sij hawm tsim.

Rau qhov kev xaiv ntawm kev tswj lub tswv yim, nws tau taug qab mus rau qhov nruab nrab- thiab lub zog me me. Tam sim no-hom PWM tswj yog ib txoj kev siv dav. Hauv DC-DC converter, cov zis ripple tuaj yeem tswj tau ntawm 10mV, uas yog qhov zoo tshaj rau cov khoom siv hluav taws xob zoo rau kev tswj hluav taws xob. Lub zog hloov tshuab yog txwv los ntawm kev hloov pauv, qhov hloov zaus feem ntau qis dua 350kHz; soft switching thev naus laus zis yog ua kom cov cuab yeej hloov pauv hloov ntawm xoom voltage lossis xoom lub xeev tam sim no, paub txog kev hloov pauv yog xoom, kom qhov hloov zaus tuaj yeem nce mus rau qib megahertz. Cov tshuab no tsuas yog siv rau hauv cov tshuab hluav taws xob siab, uas tsis tshua muaj nyob hauv cov tshuab hluav taws xob tsawg.

Rau lub hwj chim mov hom, nws yog feem ntau muab faib mus rau hauv ib tug centralized fais fab mov system thiab faib fais fab mov. Cov tshuab hluav taws xob niaj hnub siv hluav taws xob feem ntau siv cov khoom siv hluav taws xob faib hluav taws xob kom ua tau raws li cov kev xav tau ntawm cov cuab yeej siv siab.

Txij li cov khoom siv ncaj qha txiav txim siab qhov kev ntseeg siab ntawm cov khoom siv hluav taws xob, kev xaiv cov khoom tseem ceeb tshwj xeeb. Cov khoom tsis ua haujlwm feem ntau yog tsom rau hauv plaub lub ntsiab lus hauv qab no: teeb meem kev tsim khoom zoo, teeb meem kev ntseeg siab ntawm cov cuab yeej, teeb meem tsim, thiab teeb meem poob. Qhov no yuav tsum tau txais kev saib xyuas txaus hauv kev siv.

Rau Circuit Court topology, lub switching fais fab mov feem ntau siv yim hom topologies xws li ib leeg-kawg rau pem hauv ntej hom, ib leeg-kawg flyback hom, ob-tube rau pem hauv ntej hom, ob zaug ib leeg-kawg rau pem hauv ntej hom, ob npaug rau pem hauv ntej hom, thawb-rub hom , ib nrab choj, thiab tag nrho tus choj. Ntawm lawv, kev hloov siab ntawm ob lub raj rau pem hauv ntej-zoo siab, ob chav-zoo siab thiab ib nrab-bridge circuits tsuas yog cov khoom siv hluav taws xob hluav taws xob, thiab nws yog qhov yooj yim los xaiv 600V hloov raj thaum lub 60 derating, thiab muaj. tsis muaj teeb meem ntawm unidirectional polarization saturation. Feem ntau, peb qhov topologies no tau siv dav hauv high voltage input circuits.