Kev daws teeb meem ntawm lub teeb load howling ntawm switching fais fab mov
Hloov fais fab mov yog ib hom khoom siv hluav taws xob ntau zaus uas tuaj yeem hloov pauv tam sim no mus rau qhov tam sim no ncaj qha. Hauv kev txhim kho thiab kev siv hluav taws xob hluav taws xob thev naus laus zis, nws tau siv dav hauv ntau yam khoom siv hluav taws xob, xws li khoos phis tawj, khoom siv sib txuas lus, kev tswj hwm kev lag luam thiab cov khoom siv hauv tsev. Txawm li cas los xij, cov khoom siv hluav taws xob hloov pauv yuav tawm suab nrov nrov hu ua "howling" thaum nws ua haujlwm, uas cuam tshuam rau kev siv thiab lub neej ntawm cov khoom siv. Tshwj xeeb tshaj yog thaum switching fais fab mov nyob rau hauv lub teeb load, lub suab nrov yog pom tseeb. Daim ntawv no yuav qhia meej txog qhov ua rau lub teeb-load howling ntawm switching fais fab mov thiab yuav daws tau li cas.
Ua ntej, qhov ua rau lub teeb load howling
Thaum lub zog hloov hluav taws xob ua haujlwm, nws cov zis hluav taws xob yuav hloov nrog kev hloov pauv ntawm qhov loj me. Nyob rau hauv ib txwm muaj xwm txheej, thaum lub load tam sim no nyob rau ntawm tag nrho cov load, cov zis voltage yog kuj ruaj khov. Txawm li cas los xij, thaum lub sijhawm thauj khoom tam sim no nyob rau hauv lub teeb ntawm lub teeb, cov zis hluav taws xob yuav hloov pauv, ua rau lub tshuab hluav taws xob muaj suab nrov. Qhov no yog vim hais tias cov ntsiab lus hloov pauv tsis tuaj yeem hloov pauv tag nrho nyob rau hauv lub teeb load, uas ua rau kom muaj kev sib haum xeeb nyob rau hauv waveform ntawm switching fais fab mov, ua rau lub suab nrov dua.
Thib ob, kev daws teeb meem rau lub teeb load howling txoj kev
(A) optimize tus tsim ntawm switching fais fab mov
Optimizing tus tsim ntawm switching fais fab mov yog ib txoj kev zoo los txo lub teeb load howling. Hauv kev tsim, qhov tso zis voltage ntau ntawm kev hloov hluav taws xob yuav tsum tau teeb tsa kom tsim nyog, qhov tsim nyog resonant capacitor yuav tsum raug xaiv, thiab qee qhov damping lossis filtering circuits yuav tsum tau ntxiv los tiv thaiv cov tiam ntawm kev sib haum xeeb lossis txo cov suab nrov.
1. Teem lub tso zis voltage ntau ntawm switching fais fab mov.
Hauv kev tsim cov khoom siv hluav taws xob hloov hluav taws xob, hloov cov tswj hluav taws xob thiab cov tswj hluav taws xob yuav tsum tau siv, thiab kev hloov pauv ntawm cov zis hluav taws xob yuav tsum tau teeb tsa kom tsim nyog, uas tuaj yeem txo cov suab nrov. Feem ntau, thaum ntxiv regulators, yuav tsum tau them nyiaj mloog mus rau kev tiv thaiv tsis zoo load zoo thiab pov tseg ntawm load voltage.
2. Xaiv qhov tsim nyog resonant capacitor.
Thaum lub switching converter switches, lub switching tube yuav tsum tau them thiab tawm tam sim ntawd, uas yuav tsim ib tug loj tus naj npawb ntawm high-frequency signals nyob rau hauv lub zaus spectrum ntawm lub switching raj. Nyob rau lub sijhawm no, tsim nyog resonant capacitors yuav tsum tau siv rau high-frequency filtering, thiaj li tsis txhob muaj teeb meem xws li flashing teeb thiab thaiv suab nrov los ntawm high-frequency suab.
3. Ntxiv damping lossis filtering Circuit Court.
Ntxiv damping lossis filtering Circuit Court nyob rau hauv switching fais fab mov tuaj yeem txo lub suab nrov ntawm lub teeb load howling. Damping Circuit Court feem ntau yog tsim nyog rau kev ua haujlwm lub teeb ua haujlwm ib txwm muaj, thiab lim Circuit Court yog ib txoj hauv kev zoo dua rau kev hloov hluav taws xob siv hauv lub teeb load. Lub lim dej muaj xws li lub voj voog qis qis uas muaj LC, los yog siv txoj kev sib txuas ntawm AC fais fab mov inductance los txo cov suab nrov ntawm kev hloov hluav taws xob.
(2) Optimize lub hwj huam mov layout
Kev ua kom zoo ntawm cov khoom siv hluav taws xob kuj yog ib qho tseem ceeb los daws qhov teeb meem ntawm lub teeb. Txawm hais tias lub suab nrov tuaj yeem txo qis hauv kev tsim thiab tsim cov khoom siv hluav taws xob hloov hluav taws xob, lwm yam yuav tsum tau txiav txim siab los xyuas kom meej qhov kev ua haujlwm ntawm kev hloov hluav taws xob thiab txo cov suab nrov. Lub sijhawm no, kev ua kom zoo ntawm cov khoom siv hluav taws xob yuav yog qhov tseem ceeb heev.
1. Txo qhov ntev ntawm cov kab rhiab heev
Thaum npaj cov kab hluav taws xob, qhov ntev ntawm cov kab rhiab yuav tsum raug txo kom ntau li ntau tau los tiv thaiv kev cuam tshuam ntawm sab nraud electromagnetic cuam tshuam (EMI). Cov kab hluav taws xob no tuaj yeem suav nrog kev tswj xyuas cov khoom siv hloov pauv, cov khoom siv hluav taws xob tso tawm hluav taws xob, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob.
2. Ua tib zoo mloog cov teeb liab hauv av
Rau qee qhov kev thov tshwj xeeb, qee lub teeb liab kis tau tus mob thiab cov kab ua haujlwm yuav tsum tau ua hauv av. Txhawm rau txo cov suab nrov ntawm lub teeb-load howling, cov teeb liab hauv av yuav tsum tau muab cais tawm ntawm lub zog hauv av kom tsis txhob muaj kev cuam tshuam ntawm qhov chaw hauv av ntawm cov kab sib kis.
(C) txhim kho lub zog load
Txhim kho fais fab mov load yog ib txoj hauv kev zoo los daws qhov teeb meem ntawm lub teeb load howling. High-power load los yog tsim nyog them Circuit Court yuav siv tau los txhim kho lub hwj chim mov load nyob rau hauv lub teeb load. Thaum lub load tam sim no nyob rau hauv qhov tsawg kawg nkaus los yog lub teeb load lub xeev, nws yog ib tug zoo txoj kev siv high-power load. Vim hais tias nyob rau hauv siab load tam sim no, lub impedance ntawm lub hwj chim mov load yog tsawg, thiab kev hloov thiab stability ntawm lub hwj chim mov yog zoo; Txawm li cas los xij, nyob rau hauv lub teeb load tam sim no, lub load impedance nce, kev hloov peev xwm ntawm lub hwj chim mov tsis muaj zog thiab lub suab nrov nce. Lub staggered Circuit Court tuaj yeem txo qhov kev hloov pauv ntawm cov khoom siv hluav taws xob thiab txhim kho cov xwm txheej hauv qab lub teeb, yog li txo cov suab nrov.
