Yuav ua li cas xaiv lub tso zis lim capacitor ntawm switching fais fab mov
Lub ESR ntawm lub capacitor yog qhov sib npaug series tsis kam lossis impedance ntawm lub capacitor.
Ib qho zoo tagnrho capacitor tsis muaj qhov tsis kam. Txawm li cas los xij, hauv kev muaj tiag, txhua tus capacitor muaj qhov tsis kam, thiab tus nqi tiv thaiv no muaj feem xyuam nrog cov ntaub ntawv thiab cov qauv uas ua rau lub capacitor. Hauv kev hloov hluav taws xob siv tshuab ua ntej daim ntawv thov loj, kev siv cov khoom siv hluav taws xob sib txuas, cov khoom siv hluav taws xob hluav taws xob ua haujlwm nyob rau hauv lub xeev tsis tshua muaj DC, los ntawm kev lim dej thiab rectification Circuit Court hloov AC rau DC. tam sim no. Nyob rau hauv qhov tsawg-frequency DC fais fab mov, lub capacitance ntawm lub peev xwm ntawm lub filtering nyhuv plays lub luag hauj lwm txiav txim, lub series impedance ntawm lub capacitor yuav ignored. Txawm li cas los xij, qhov ua tau zoo ntawm cov khoom siv hluav taws xob tsawg tsawg Qhov tsis zoo ntawm cov ntim loj yog qhov pom tseeb heev.
Vim muaj kev vam meej ntawm kev siv tshuab hluav taws xob, nyob rau hauv ob lub xyoo dhau los, qhov kev loj hlob zuj zus ntawm high-frequency switching power supply technology ntawm pulse width modulation, uas zoo heev txhim kho kev hloov pauv ntawm lub hwj huam mov, tab sis kuj txo qhov ntim ntawm lub hwj huam mov. . Lub ntim ntawm lub hwj chim mov. Qhov siab dua qhov kev khiav hauj lwm zaus ntawm kev hloov hluav taws xob, qhov me me ntawm cov khoom siv hluav taws xob. Kev khiav hauj lwm zaus ntawm kev hloov hluav taws xob sib txawv ntawm kaum ntawm KHz mus rau ntau MHz. Nyob rau hauv lub switching fais fab mov, ESR ntawm lub capacitor ncaj qha cuam tshuam cov nyhuv ntawm lub capacitor, uas yog ib qho tseem ceeb tshaj lub peev xwm ntawm lub capacitor, qhov tseeb, lub capacitance ntawm lub capacitor peb tham txog yog feem ntau ntsuas ntawm 120Hz ntsuas tus nqi. , thaum lub sij hawm ua hauj lwm zaus nce, lub peev xwm capacitance yuav sharply txo, los yog txawm tsis ua si lub luag hauj lwm ntawm capacitance txhua. Feem ntau, koj yuav tsum xaiv cov capacitors nrog ESR me me. Ntawm ntau hom capacitors, electrolytic capacitors feem ntau muaj ESR loj tshaj plaws, tantalum capacitors qhov zoo tshaj plaws tom ntej, thiab ceramic capacitors zoo tshaj plaws. Tau kawg, txawm tias qhov tseeb, txawm tias ntawm cov khoom siv hluav taws xob electrolytic, muaj cov khoom siv hluav taws xob zoo tib yam thiab qis ESR electrolytic capacitor. Tsawg ESR electrolytic capacitor yuav tsum tau siv rau kev hloov hluav taws xob tso zis lim dej. Hauv kev txij nkawm Hauv kev saib xyuas, yog tias koj siv cov khoom siv hluav taws xob zoo tib yam los hloov cov ESR electrolytic capacitors qis, qhov hloov hluav taws xob tuaj yeem ua haujlwm rau lub sijhawm luv luv, tab sis lub neej yeej tsis ntev. Tsis tau txais nws txoj cai, lub capacitor yuav sai sai
Vim tias qhov poob loj dhau thiab tawg lossis tawg, yog li kev hloov ntawm cov capacitors yuav tsum tau ceev faj. Tib lub peev xwm thiab tib lub zog tiv taus hluav taws xob electrolytic capacitors, qhov loj ntawm ESR feem ntau me me. Tib lub peev xwm Tib lub peev xwm electrolytic capacitors nrog sib txawv withstand voltages, withstand voltage siab nyhav me me ESR. Tib lub zog ntawm tib lub peev xwm ntawm cov capacitors, 105 degrees dua li 85 degrees ESR yog me dua. Tau kawg, qhov no tsis yog Tsis Txaus Siab, rau tib lub chaw tsim khoom ntawm tib lub tshuab electrolytic capacitors, yeej muaj tseeb.
