Cov yam ntxwv ntawm kev ua haujlwm thiab kev xaiv kev xav txog kev hloov cov khoom siv hluav taws xob
Hloov fais fab mov yog ib hom kev siv hluav taws xob uas siv cov cuab yeej hluav taws xob niaj hnub siv hluav taws xob los tswj lub sijhawm sib piv ntawm kev qhib thiab tawm ntawm lub transistor hloov, tswj cov zis hluav taws xob ruaj khov. Kev hloov hluav taws xob feem ntau yog tsim los ntawm pulse width modulation (PWM) tswj IC thiab MOSFET. Lub hauv paus ntsiab lus ua haujlwm ntawm lub zog hloov hluav taws xob yog tias thaum lub caij hloov pauv nyob rau hauv lub xeev qhib, qhov tam sim no hauv Circuit Court tsis tuaj yeem ntws, ua rau xoom voltage thiab lub zog hauv Circuit Court; Thaum lub caij hloov pauv nyob rau hauv lub xeev kaw, tam sim no hauv Circuit Court tuaj yeem ntws, yog li ua rau lub zog thiab lub zog hauv Circuit Court kom ncav cuag qhov tseem ceeb.
Piv nrog rau cov khoom siv hluav taws xob linear, tus nqi ntawm ob qho tib si hloov khoom siv hluav taws xob nce ntxiv nrog kev nce ntawm cov khoom siv hluav taws xob, tab sis lawv qhov kev loj hlob txawv. Tus nqi ntawm cov khoom siv hluav taws xob linear yog qhov tseeb siab dua li ntawm qhov hloov hluav taws xob ntawm qhov chaw tso zis hluav taws xob, uas yog hu ua tus nqi thim rov qab. Nrog rau kev txhim kho thiab kev tsim kho tshiab ntawm hluav taws xob hluav taws xob thev naus laus zis, thev naus laus zis ntawm kev hloov pauv cov khoom siv hluav taws xob tas li, thiab qhov kev hloov pauv ntawm tus nqi no tau nce zuj zus mus rau qhov tso zis hluav taws xob qis kawg, muab qhov chaw dav dav rau kev hloov cov khoom siv hluav taws xob.
Cov yam ntxwv ua haujlwm ntawm kev hloov hluav taws xob hloov hluav taws xob:
1. Me me thiab lub teeb yuag: Vim tsis muaj lub zog zaus transformers, lub ntim thiab qhov hnyav tsuas yog 20-30% ntawm cov khoom siv hluav taws xob.
2. Kev siv hluav taws xob tsawg thiab kev ua haujlwm siab: Fais fab transistors ua haujlwm nyob rau hauv lub xeev hloov, yog li lub zog noj ntawm lub transistor yog tsawg thiab kev hloov dua siab tshiab yog siab, feem ntau 60-70%, thaum linear fais fab mov tsuas muaj 30-40%.
3. Cov qauv yooj yim, kev ntseeg siab: yooj yim los tswj, thiab tam sim no ripple tus nqi tuaj yeem ua tiav tau yooj yim ntawm qib qis.
Qhov zoo ntawm lub zog hloov hluav taws xob yog tias nws tuaj yeem tswj tau lub zog hloov pauv sai thiab yooj yim, thiab tuaj yeem txuag hluav taws xob zoo. Qhov tsis zoo yog tias cov khoom siv hluav taws xob hloov pauv muaj lub neej luv luv thiab yooj yim cuam tshuam los ntawm lwm yam xws li av noo, kub, thiab lwm yam.
Kev xaiv ntawm Switching Power Supply:
1) Xaiv qhov tsim nyog input voltage specifications;
2) Xaiv cov khoom siv hluav taws xob zoo: Txhawm rau kom ntev lub neej ntawm cov khoom siv hluav taws xob, koj tuaj yeem xaiv tus qauv nrog 30% nce hauv cov zis hluav taws xob.
3) Xav txog cov yam ntxwv ntawm kev thauj khoom: Yog tias lub tsheb thauj khoom yog lub cev muaj zog, lub teeb lub teeb, lossis lub peev xwm thauj khoom, thaum lub sijhawm tam sim no siab thaum siv hluav taws xob, lub zog tsim nyog yuav tsum raug xaiv kom tsis txhob muaj ntau dhau. Yog hais tias lub load yog lub cev muaj zog, voltage backfilling yuav tsum tau txiav txim siab thaum kaw.
4) Nws yog ib qho tsim nyog los txiav txim siab qhov chaw ua haujlwm kub ntawm cov khoom siv hluav taws xob thiab seb puas muaj cov khoom siv cua txias ntxiv. Hauv cov khoom siv hluav taws xob uas muaj qhov kub thiab txias heev, nws yog ib qho tsim nyog los txo qhov tso zis. Lub derating nkhaus ntawm cov zis fais fab nrog kev hwm rau ambient kub.
5) Xaiv txhua txoj haujlwm raws li daim ntawv thov
6) Xaiv cov cai tswj kev nyab xeeb thiab cov ntawv pov thawj electromagnetic compatibility (EMC).
Cov khoom siv hluav taws xob hloov pauv muaj ntau yam kev siv, suav nrog cov khoom siv hauv tsev, khoos phis tawj, khoom siv hluav taws xob, tsheb hluav taws xob, thiab lwm yam.
