Txoj kev ntsuas kev hloov pauv hluav taws xob nrog Digital Oscilloscope
Cov khoom siv hluav taws xob tuaj yeem muaj ntau hom thiab ntau thiab tsawg, los ntawm cov khoom siv hluav taws xob analog-hom mus rau cov khoom siv hluav taws xob hloov pauv tau zoo. Lawv txhua tus yuav tsum tau 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 ib qho "txhua hnub" hloov hluav taws xob tuaj yeem tiv taus lub sijhawm luv luv tau zoo nyob rau hauv qhov siab tshaj ntawm nws qhov nruab nrab kev ua haujlwm. Cov kws tsim hluav taws xob tsim hluav taws xob lossis hluav taws xob siv hluav taws xob yuav tsum nkag siab tias lub zog hluav taws xob ua haujlwm li cas hauv cov xwm txheej zoo li qub thiab 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 qhov hluav taws xob nrog lub tshuab hluav taws xob digital thiab ua qhov kev ntsuas hnyav nrog lub laij lej lossis PC. Niaj hnub no, feem ntau engineers tig mus rau oscilloscope 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 kev ntsuas 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 qhov kev ntsuas xav tau
Qhov zoo tshaj plaws, txhua qhov khoom siv hluav taws xob yuav tsum coj zoo li tus qauv lej nws tau tsim los rau. Tab sis nyob rau hauv lub ntiaj teb no tiag tiag, cov khoom muaj qhov tsis xws luag, kev thauj khoom tuaj yeem sib txawv, 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 nyuaj rau kev tsim hluav taws xob tsim khoom. Xav txog cov lus nug no:
Muaj pes tsawg watts tuaj yeem ua kom muaj zog tshaj li nws lub zog ntsuas? 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 tau qhov ntsuas qhov tso zis hluav taws xob? Yuav ua li cas lub hwj chim mov cuam tshuam nrog ib tug tuag luv ntawm cov zis? Yuav ua li cas 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 Kev Ntsuas Lub Zog
Rau cov neeg siv los ua cov kev ntsuas siab bandwidth nrog oscilloscope, kev ntsuas hluav taws xob tuaj yeem ua ncaj nraim vim lawv cov zaus qis. Qhov tseeb, muaj ntau qhov kev sib tw hauv kev ntsuas hluav taws xob uas cov neeg tsim qauv ntawm kev kub ceev circuits yeej tsis tau ntsib.
Tag nrho cov switchgear tej zaum yuav muaj hluav taws xob siab thiab "floating", uas yog, tsis txuas nrog hauv av. Lub pulse dav, lub sij hawm, zaus thiab lub luag hauj lwm voj voog ntawm lub teeb liab yuav txawv. Waveforms yuav tsum raug ntes thiab tshuaj xyuas ncaj ncees txhawm rau txheeb xyuas qhov tsis txaus ntseeg hauv lub waveform. Qhov no xav tau ntawm oscilloscope. Ntau Qhov Kev Ntsuas - Ib qho kawg, qhov sib txawv, thiab kev sojntsuam tam sim no yuav tsum tau ua tib lub sijhawm. 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 teeb liab sib txawv nrog qhov sib txawv amplitudes hauv ib qhov tau txais.
Hloov cov khoom siv hluav taws xob hauv paus
Qhov tseem ceeb ntawm DC lub zog hluav taws xob hauv cov tshuab niaj hnub no feem ntau yog qhov hloov hluav taws xob hloov hluav taws xob (switching power supply), uas paub txog nws lub peev xwm los daws cov khoom sib txawv. Lub hwj chim teeb liab txoj kev ntawm ib tug raug switching fais fab mov muaj xws li passive Cheebtsam, active Cheebtsam, thiab sib nqus Cheebtsam. Hloov cov khoom siv hluav taws xob siv tsawg tsawg li ntau tau (xws li resistors thiab linear transistors) thiab feem ntau (zoo tshaj) cov khoom tsis zoo: hloov cov transistors, capacitors, thiab magnetics.
Cov khoom siv hluav taws xob hloov pauv 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 cov khoom siv hluav taws xob hloov hluav taws xob, qhia txog lub zog hloov pauv, suav nrog cov khoom siv nquag, cov khoom siv tsis zoo, thiab cov khoom sib nqus.
Lub tshuab 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 zoo. Qhov tseem ceeb sib npaug, lawv siv lub zog me me hauv ob lub xeev nyob rau hauv thiab tawm, muaj txiaj ntsig zoo thiab ua kom muaj cua sov tsawg. Hloov cov khoom siv feem ntau txiav txim siab tag nrho kev ua haujlwm ntawm lub zog hloov hluav taws xob. Cov kev ntsuas tseem ceeb ntawm cov khoom siv hloov pauv muaj xws li: hloov pauv, qhov nruab nrab lub zog poob, thaj chaw ua haujlwm nyab xeeb, thiab lwm yam.
