Kev ua haujlwm ntawm capacitor
Tso lus
1. Bypass
Bypass capacitors yog lub zog cia khoom siv uas muab lub zog rau cov khoom siv hauv zos, uas tuaj yeem ua homogenize cov zis ntawm qhov ntsuas hluav taws xob thiab txo cov kev xav tau ntawm kev thauj khoom. Zoo li lub roj teeb me me, lub bypass capacitor tuaj yeem raug them thiab tawm mus rau hauv lub cuab yeej. Yuav kom txo qis impedance, lub bypass capacitor yuav tsum nyob ze li sai tau rau lub hwj chim mov tus pin thiab av tus pin ntawm lub load ntaus ntawv. Qhov no tuaj yeem tiv thaiv kev nce siab hauv av thiab suab nrov los ntawm cov khoom siv ntau dhau. Lub peev xwm hauv av yog qhov poob qis thaum qhov kev sib txuas hauv av dhau los ntawm qhov loj tam sim no burr.
2. Decoupling
Decoupling, tseem hu ua decoupling. Los ntawm qhov kev xav hauv Circuit Court, nws yog ib txwm ua tau kom paub qhov txawv ntawm qhov chaw ntawm lub tsav thiab lub load uas tau tsav. Yog hais tias lub load capacitance kuj loj heev, tsav Circuit Court yuav tsum tau them thiab tso tawm lub capacitance kom tiav lub teeb liab dhia. Thaum cov ntug nce siab yog qhov ntxhab, qhov tam sim no kuj loj, yog li cov tsav tam sim no yuav nqus tau ntau lub zog tam sim no. Vim lub inductance thiab tsis kam nyob rau hauv Circuit Court (tshwj xeeb tshaj yog cov inductance ntawm lub nti pin, nws yuav tsim ib tug rebound), qhov tam sim no yeej yog ib hom suab nrov piv rau ib txwm tej yam kev mob, Nws cuam tshuam rau lub cev ua hauj lwm ntawm lub yav dhau los theem, uas yog. hu ua "coupling".
Decoupling capacitors ua raws li "roj teeb" kom tau raws li cov kev hloov pauv hauv kev tsav tsheb tam sim no thiab zam kev cuam tshuam kev sib txuas.
Ua ke bypass capacitance thiab decoupling capacitance yuav yooj yim to taub. Lub bypass capacitor yog decoupled tiag tiag, tab sis lub bypass capacitor feem ntau yog hais txog high-frequency bypass, uas muab ib tug tsawg impedance leakage txoj kev rau high-frequency switching suab nrov. Lub high-frequency bypass capacitance yog feem ntau me me, thiab feem ntau yog coj raws li 0.1 raws li resonant zaus μ F, 0.01 μ F, thiab lwm yam; Lub peev xwm ntawm decoupling capacitor feem ntau loj, tej zaum 10 μ F los yog ntau dua, txiav txim siab raws li qhov kev faib tawm hauv Circuit Court thiab qhov sib txawv ntawm cov tsav tam sim no. Bypass yog hais txog kev siv qhov cuam tshuam hauv cov teeb liab tawm tswv yim raws li cov khoom siv lim, thaum decoupling hais txog kev siv qhov cuam tshuam hauv cov teeb liab tso zis raws li cov khoom siv lim kom tsis txhob cuam tshuam cov teeb liab rov qab mus rau lub zog hluav taws xob. Qhov no yuav tsum yog lawv qhov sib txawv tseem ceeb.
3. Lim
Raws li kev xav (xav tias qhov capacitance yog ntshiab), qhov loj dua qhov capacitance, qhov me me ntawm impedance, thiab qhov ntau zaus ntawm qhov kev nkag. Tab sis ua tau ntau tshaj 1 μ Lub peev xwm ntawm F feem ntau yog electrolytic, nrog rau cov inductance loj, yog li cov impedance nce thaum zaus siab. Qee lub sij hawm nws tuaj yeem pom tau tias lub tshuab hluav taws xob loj electrolytic txuas nrog rau qhov sib npaug nrog lub capacitor me me. Lub sijhawm no, lub capacitor loj txuas nrog rau qhov tsawg zaus, thiab lub capacitor me me txuas nrog lub siab zaus. Lub luag hauj lwm ntawm capacitance yog kom dhau qhov siab tsis kam qis, dhau qhov siab zaus tsis kam qis. Qhov loj dua qhov capacitance, qhov yooj yim dua nws dhau ntawm qhov tsawg zaus. Tshwj xeeb yog siv nyob rau hauv filtering, loj capacitance (1000 μ F) Lim tsawg zaus, me me capacitance (20pF) lim siab zaus. Qee cov netizens tau pom tseeb piv cov lim capacitor rau "pas dej". Txij li thaum qhov hluav taws xob ntawm ob qho kawg ntawm lub capacitor tsis hloov pauv tam sim ntawd, nws tuaj yeem pom tias qhov siab dua lub teeb liab zaus, qhov ntau dua qhov attenuation. Nws tuaj yeem hais meej meej tias lub capacitor zoo li lub pas dej, uas tsis ua rau muaj kev hloov pauv ntawm cov dej ntim vim qhov sib ntxiv lossis evaporation ntawm ob peb tee dej. Nws converts ib tug hloov nyob rau hauv voltage mus rau ib tug hloov nyob rau hauv tam sim no. Qhov ntau zaus, qhov siab dua qhov tam sim no, yog li buffering qhov voltage. Filtering yog cov txheej txheem ntawm kev them nyiaj thiab tso tawm.
4. Lub zog cia
Lub zog khaws cia capacitor sau cov nqi hluav taws xob los ntawm lub tshuab hluav taws xob thiab xa cov hluav taws xob khaws cia mus rau qhov chaw tso zis hluav taws xob ntawm cov khoom siv hluav taws xob los ntawm cov hlau lead converter. Qhov ntsuas hluav taws xob yog 40 txog 450VDC, thiab tus nqi capacitance yog 220 rau 150 000 μ Aluminium electrolytic capacitors ntawm F (xws li B43504 lossis B43505 los ntawm EPCOS) feem ntau siv. Nyob ntawm cov kev xav tau ntawm cov khoom siv hluav taws xob sib txawv, cov cuab yeej siv qee zaum yuav nyob rau hauv series, parallel, los yog kev sib txuas ntawm no. Rau cov khoom siv hluav taws xob uas muaj lub zog ntau dua 10 KW, lub tank loj zoo li cov kauv davhlau ya nyob twg capacitors feem ntau yog siv.
