Yuav ua li cas kom txo tau lub ripple ntawm switching fais fab mov?
Raws li kev ua haujlwm siab thiab kev ua haujlwm siab, kev hloov hluav taws xob tau siv dav hauv ntau yam khoom siv hluav taws xob. Txawm li cas los xij, vim yog lub zog hloov pauv hauv cov txheej txheem ntawm cov khoom siv hluav taws xob, yuav ua rau qee qhov ripple, txawm hais tias qhov ripple no yuav tsis muaj kev cuam tshuam ncaj qha rau cov khoom siv hluav taws xob, tab sis rau qee cov khoom siv hluav taws xob, ripple tsis tuaj yeem tsis quav ntsej kiag li. Yog li ntawd, txo qhov ripple ntawm kev hloov pauv hluav taws xob tau dhau los ua qhov teeb meem uas yuav tsum tau them sai sai rau.
Yog li, yuav ua li cas hloov hluav taws xob txo ripple? Daim ntawv no yuav qhia peb txoj hauv kev nthuav dav: kev lim dej, kev siv thev naus laus zis thiab kev tswj hwm thev naus laus zis.
1. Lim tshuab
Lim tshuab yog ib txoj hauv kev siv ntau tshaj plaws los txo cov ripple hauv kev hloov hluav taws xob. Los ntawm kev txuas lub lim capacitor thiab lim inductor nyob rau hauv series ntawm qhov kawg ntawm cov khoom siv hluav taws xob hloov pauv, lub siab zaus ripple ntawm qhov kawg ntawm cov khoom siv hluav taws xob hloov pauv tuaj yeem lim tau zoo. Cov nram qab no yuav tsum tau them nyiaj mloog mus rau hauv filtering technology:
(1) Xaiv qhov tsim nyog lim capacitors thiab inductors.
Xaiv qhov tsim nyog lim capacitors thiab inductors yog qhov tseem ceeb ntawm kev lim dej. Feem ntau hais lus, lub lim capacitor yuav tsum muaj lub peev xwm txaus kom nws tuaj yeem ua tau zoo thiab tso tawm, yog li txo qhov ripple. Lub lim inductor yuav tsum muaj inductance txaus kom nws tuaj yeem tsim rov qab electromotive quab yuam thaum cov zis tam sim no hloov, yog li tshem tawm ripple.
(2) Optimize lub lim circuit
Nyob rau hauv lub lim lim, kev npaj thiab kev sib txuas ntawm lim capacitor thiab lim inductor yuav cuam tshuam rau cov nyhuv lim. Yog li ntawd, peb yuav tsum optimize lub lim circuit kom tshem tawm cov ripple ntau npaum li sai tau.
(3) Ntsuam xyuas cov nyhuv lim dej
Thaum kawg, peb yuav tsum tau ntsuas qhov kev lim dej kom ntseeg tau tias cov zis ripple ntawm kev hloov fais fab mov yog tswj tau zoo.
2. Modulation technology
Modulation thev naus laus zis yog lwm txoj hauv kev siv los txo ripple hauv kev hloov hluav taws xob. Feem ntau, peb siv PWM modulator los tsim kom muaj kev tswj tau ripple ntawm cov zis. Qhov zaus ntawm qhov ripple no yuav tsum siab tshaj qhov kev txiav tawm zaus ntawm lub lim dej ripple, yog li tag nrho cov ripples, nrog rau cov tsim los ntawm lub modulator, yuav raug tshem tawm los ntawm lub lim. Modulation thev naus laus zis muaj cov hauv qab no los saib xyuas:
(1) Xaiv qhov tsim nyog modulation zaus
Lub modulation zaus yuav tsum siab txaus kom lub lim tau zoo lim cov ripple. Tsis tas li ntawd, qhov kev hloov pauv zaus yuav tsum tsis txhob siab dhau, txwv tsis pub nws yuav ua rau muaj kev siv hluav taws xob ntau dhau thiab EMI cuam tshuam.
(2) Optimizing PWM modulator
Optimizing PWM modulator tuaj yeem txhim kho qhov kev hloov kho kom raug thiab ua haujlwm tau zoo, kom tau txais txiaj ntsig zoo ntawm kev txo qis ripple.
(3) Kev ntsuam xyuas cov nyhuv modulation
Thaum kawg, nws yog ib qho tsim nyog los soj ntsuam cov nyhuv modulation kom paub meej tias cov ripple filtering ntawm kev hloov fais fab mov yog tswj tau zoo.
3. Tswj thev naus laus zis
Tswj thev naus laus zis yog ib txoj hauv kev tshiab los txo cov ripple los ntawm kev hloov pauv kev ua haujlwm ntawm kev hloov hluav taws xob. Cov thev naus laus zis no yuav tsum tau siv qee qhov kev tswj hwm qib siab kom txo tau cov zis tawm los ntawm kev hloov pauv zaus, hloov lub luag haujlwm piv thiab lwm yam tsis muaj kev hloov pauv hluav taws xob. Control technology muaj cov nram qab no yam uas yuav tsum xyuam xim rau:
(1) Hloov kev tswj hwm zaus
Switching zaus tswj tuaj yeem hloov qhov ua haujlwm zaus ntawm kev hloov hluav taws xob, yog li kho cov zis tam sim no thiab qhov hluav taws xob ntawm kev hloov hluav taws xob nyob rau hauv kev ua haujlwm sib txawv. Cov thev naus laus zis no feem ntau yuav tsum tau siv qee qhov kev tswj hwm kev tswj hwm qib siab thiab cov tswj hwm digital siab.
(2) Kev tswj ntawm kev hloov lub luag haujlwm piv
Kev tswj lub luag haujlwm hloov pauv tuaj yeem hloov pauv lub luag haujlwm piv ntawm kev hloov hluav taws xob, yog li kho qhov tam sim no thiab qhov hluav taws xob ntawm qhov tso zis kawg. Cov thev naus laus zis no yuav tsum tau siv qee qhov kev tswj hwm txoj hauv kev, xws li PID maub los, thiab lwm yam, thiab nws xav tau kev tswj hwm digital kom paub txog nws.
(3) Ntsuam xyuas cov nyhuv tswj
Thaum kawg, nws yog ib qho tsim nyog los ntsuas qhov kev tswj xyuas kom ntseeg tau tias lub ripple filtering ntawm switching fais fab mov yog tswj tau zoo.
