AC vs DC Voltage
AC thiab DC, tseem hu ua alternating tam sim no thiab ncaj qha tam sim no, yog ob hom kev taw qhia tam sim no. Lub teeb liab AC voltage yog lub teeb liab qhov chaw nyob hauv qab qhov hluav taws xob - lub sij hawm nkhaus yog xoom whereas DC voltage yog unidirectional ntws ntawm hluav taws xob nqi. Hauv tsab xov xwm no, peb yuav tham txog dab tsi AC voltage thiab DC voltage yog, lawv daim ntawv thov, yuav ua li cas AC voltages thiab DC voltages raug tsim, cov ntsiab lus ntawm AC voltages thiab DC voltages, qhov zoo sib xws ntawm ob, thiab thaum kawg qhov txawv ntawm AC. voltage thiab DC voltage.
AC Voltage
Txawm tias, lo lus AC yog ib qho luv luv ntawm Alternating Current, feem ntau yog siv los qhia lo lus " alternating" ib leeg. AC voltages yog qhov hluav taws xob qhov chaw nyob hauv ib lub voj voog yog xoom. AC voltages tuaj yeem siv waveforms xws li sinusoidal, square, saw hniav, daim duab peb sab thiab ntau yam ntaub ntawv. Feem ntau hom AC voltage yog sinusoidal voltage. Cov khoom siv xws li dynamos yog qhov tseem ceeb ntawm AC voltages.
AC voltages muaj nyob rau hauv lub teb chaws hluav taws xob daim phiaj raws li lawv yog ib qho yooj yim los tsim thiab faib. Nikola Tesla yog thawj tus kws tshawb fawb tom qab ua AC kis kab mob. Feem ntau ntawm AC kis kab mob siv 50 Hz lossis 60 Hz cov cim. Hloov tam sim no tau yooj yim tsim nyob rau hauv txhua hom ntawm cov chaw nres tsheb fais fab xws li hydro fais fab nroj tsuag, nuclear fais fab nroj tsuag, thee, diesel, thiab txawm cua fais fab nroj tsuag. Feem ntau ntawm cov khoom siv niaj hnub ua haujlwm nrog AC voltages, tab sis thaum xav tau DC voltage, AC - DC converters siv tau kom tau txais DC voltage.
DC Voltage
DC voltages yog qhov hluav taws xob uas cov nqi taug kev hauv ib qho kev taw qhia nkaus xwb. Txhua qhov qauv hluav taws xob uas muaj qhov tsis yog-zero net cheeb tsam nyob rau hauv qhov hluav taws xob - lub sij hawm nkhaus tuaj yeem txheeb xyuas tau tias yog DC voltage.
DC voltages yog tsim nyob rau hauv cov khoom siv xws li hnub ci vaj huam sib luag, thermocouples thiab roj teeb. Qee cov cuab yeej xav tau DC voltages du heev los ua haujlwm. Cov khoom siv xws li khoos phis tawj siv DC voltages ua haujlwm. Nyob rau hauv rooj plaub uas yuav tsum tau DC voltages, AC – DC adapters (converters) yog siv los ua hauj lwm.
Qhov txawv ntawm AC Voltage thiab DC Voltage yog dab tsi?
