Siv Digital Oscilloscope los ntsuas qhov hloov pauv hluav taws xob
Cov khoom siv hluav taws xob tuaj yeem muaj ntau hom thiab ntau thiab tsawg, los ntawm cov khoom siv hluav taws xob analog mus rau cov khoom siv hluav taws xob hloov pauv tau zoo. Lawv txhua tus ntsib qhov chaw ua haujlwm nyuaj thiab muaj zog. Cov khoom siv thauj khoom thiab kev xav tau tuaj yeem hloov pauv sai sai. Txawm tias "txhua hnub" hloov cov khoom siv hluav taws xob yuav tsum muaj peev xwm tiv taus qhov siab tshaj plaws uas nyob deb tshaj lawv cov kev khiav hauj lwm nruab nrab. Cov kws tsim qauv tsim cov khoom siv hluav taws xob lossis cov tshuab uas yuav siv cov khoom siv hluav taws xob yuav tsum nkag siab tias cov khoom siv hluav taws xob ua haujlwm li cas hauv cov xwm txheej zoo li qub nrog rau cov xwm txheej phem tshaj plaws.
Yav dhau los, tus cwj pwm ntawm tus cwj pwm ntawm lub hwj huam mov txhais tau tias ntsuas quiescent tam sim no thiab voltage nrog ib tug digital multimeter thiab ua rau mob siab rau suav nrog lub laij lej lossis PC. Niaj hnub no, feem ntau engineers tig mus rau oscilloscopes raws li lawv nyiam lub zog ntsuas platform. Niaj hnub nimno oscilloscopes tuaj yeem nruab nrog kev ntsuas hluav taws xob sib xyaw thiab kev tshuaj ntsuam xyuas software, ua kom yooj yim teeb tsa thiab ua kom ntsuas qhov ntsuas tau yooj yim dua. Cov neeg siv tuaj yeem hloov kho qhov tseem ceeb, suav nrog, thiab pom cov txiaj ntsig hauv vib nas this, tsis yog cov ntaub ntawv nyoos xwb.
Cov teeb meem tsim khoom siv hluav taws xob thiab lawv cov kev ntsuas ntsuas
Qhov zoo tshaj plaws, txhua qhov khoom siv hluav taws xob yuav tsum coj zoo li tus qauv lej uas nws tau tsim. Tab sis nyob rau hauv lub ntiaj teb no tiag tiag, cov khoom muaj qhov tsis xws luag, kev thauj khoom tuaj yeem hloov pauv, cov khoom siv hluav taws xob tuaj yeem cuam tshuam, thiab kev hloov pauv ib puag ncig tuaj yeem hloov pauv kev ua haujlwm. Tsis tas li ntawd, kev hloov pauv kev ua tau zoo thiab cov nqi xav tau kuj ua rau lub zog tsim hluav taws xob ntau dua. Xav txog cov lus nug no:
Muaj pes tsawg watts ntawm lub zog tuaj yeem ua kom muaj zog tshaj nws lub zog? Nws yuav kav ntev npaum li cas? Lub tshuab hluav taws xob puas muaj cua sov ntau npaum li cas? Yuav ua li cas thaum nws overheats? Nws xav tau cua txias npaum li cas? Yuav ua li cas thaum lub load tam sim no nce ho? Cov cuab yeej puas tuaj yeem tswj xyuas cov zis hluav taws xob? Lub hwj chim mov teb li cas rau ib qho luv luv Circuit Court ntawm cov zis? Yuav ua li cas tshwm sim thaum lub input voltage ntawm lub hwj chim mov hloov?
Cov neeg tsim qauv yuav tsum tsim cov khoom siv hluav taws xob uas siv qhov chaw tsawg dua, txo cov cua sov, txo cov nqi tsim khoom, thiab ua tau raws li EMI / EMC cov qauv nruj dua. Tsuas yog ib qho kev ntsuas nruj heev tuaj yeem ua rau cov engineers ua tiav cov hom phiaj no.
Oscilloscope thiab ntsuas lub zog
Rau cov neeg siv los ua cov kev ntsuas siab bandwidth nrog oscilloscope, kev ntsuas hluav taws xob yuav yooj yim vim lawv qhov zaus tsawg. Qhov tseeb, muaj ntau qhov kev sib tw hauv kev ntsuas hluav taws xob uas cov neeg tsim hluav taws xob high-speed circuit tsis tau ntsib.
Tag nrho cov switchgear yuav nyob rau ntawm high voltage thiab "floating", uas yog, tsis txuas rau hauv av. Lub pulse dav, lub sij hawm, zaus thiab lub luag hauj lwm voj voog ntawm lub teeb liab yuav hloov tag nrho. Lub waveform yuav tsum raug ntes thiab soj ntsuam ncaj ncees kom pom muaj qhov tsis xws luag hauv lub waveform. Qhov no xav tau ntawm oscilloscope. Ntau qhov kev sojntsuam - Kev sojntsuam ib zaug, kev sojntsuam sib txawv, thiab kev sojntsuam tam sim no yog txhua yam yuav tsum tau ua. Cov cuab yeej yuav tsum muaj lub cim xeeb loj los muab qhov chaw kaw cia rau cov txiaj ntsig tau ntev-ntev tsawg zaus. Thiab nws yuav tsum tau ntes cov cim sib txawv nrog qhov sib txawv ntawm qhov sib txawv hauv ib qho kev tau txais.
Basics ntawm switching zog mov
Qhov tseem ceeb ntawm DC lub zog hluav taws xob hauv cov tshuab niaj hnub no feem ntau yog kev hloov hluav taws xob (switching power supply), uas paub zoo txog nws lub peev xwm los daws cov kev hloov pauv. Lub hwj chim teeb liab txoj kev ntawm ib tug raug hloov fais fab mov muaj xws li passive Cheebtsam, active Cheebtsam, thiab sib nqus Cheebtsam. Hloov cov khoom siv hluav taws xob siv ob peb yam lossy raws li qhov ua tau (xws li resistors thiab linear transistors) thiab feem ntau yog siv (tseem ceeb) cov khoom tsis zoo: hloov cov transistors, capacitors thiab cov khoom sib nqus.
Cov khoom siv hluav taws xob hloov hluav taws xob kuj tseem muaj kev tswj hwm, uas suav nrog lub ntsuas pulse width modulation regulator, pulse zaus modulation regulator, thiab lub tswv yim voj 1 thiab lwm yam. Cov seem tswj yuav muaj nws tus kheej lub hwj chim mov. Daim duab 1 yog daim duab qhia yooj yim ntawm kev hloov pauv hluav taws xob, uas qhia txog lub zog hloov pauv, suav nrog cov khoom siv nquag, cov khoom siv tsis zoo thiab cov khoom sib nqus.
Kev siv hluav taws xob hloov hluav taws xob siv hluav taws xob semiconductor hloov khoom siv xws li hlau oxide teb cov nyhuv transistors (MOSFETs) thiab insulated gate bipolar transistors (IGBTs). Cov khoom siv no muaj lub sijhawm hloov luv luv thiab tuaj yeem tiv taus qhov hluav taws xob tsis ruaj khov. Qhov tseem ceeb sib npaug, lawv siv lub zog me me, muaj txiaj ntsig zoo thiab tsim kom muaj cua sov tsawg, txawm tias nyob rau hauv lossis tawm hauv lub xeev. Hloov cov khoom siv txiav txim siab txog qhov loj ntawm kev ua haujlwm tag nrho ntawm lub zog hloov hluav taws xob. Cov kev ntsuas tseem ceeb ntawm cov khoom siv hloov pauv muaj xws li: hloov pauv tsis tau, nruab nrab lub zog poob, thaj chaw ua haujlwm nyab xeeb thiab lwm yam.
