Y Potentiometer vs Rheostat
Potentiometer thiab rheostat yog ob yam khoom siv hauv hluav taws xob. Potentiometer tsis yog tsuas yog siv los ua cov khoom siv hluav taws xob nkaus xwb tab sis kuj yog lub ntsuas ntsuas. Ib qho rheostat yog siv los hloov qhov tsis kam ntawm ib lub voj voog. Ob qho khoom siv no yog siv rau hauv ob qho tib si kev sim thiab kev lag luam. Hauv tsab xov xwm no, peb yuav tham txog dab tsi potentiometer thiab rheostat yog, lawv cov ntsiab lus, kev siv ntawm potentiometers thiab rheostats, qhov zoo sib xws ntawm lawv, thiab thaum kawg qhov txawv ntawm potentiometer thiab rheostat.
Potentiometer
Potentiometer tau piav qhia raws li cov khoom siv hauv hluav taws xob thiab ntsuas ntsuas ib yam nkaus. Lub potentiometer yog siv los ntsuas qhov muaj peev xwm (voltage) ntawm lub voj voog. Cov no tau dav siv nyob rau hauv lub chaw soj nstuam ua ntej qhov kev taw qhia lub txav coil thiab digital voltmeters.
Muaj plaub hom potentiometers hu ua qhov tam sim no potentiometers, tsis tu ncua potentiometers, microvolt potentiometers, thiab thermocouple potentiometers. Potentiometers yog siv los ua qhov sib faib hluav taws xob hauv hluav taws xob. Nws yog peb lub davhlau ya nyob twg resister nrog zawv zawg kev sib cuag uas tsim tau qhov ntsuas hluav taws xob hloov tau. Lub potentiometer muaj cov khoom tiv thaiv, zawv zawg sib cuag (wiper) txav raws cov khoom tiv thaiv, cov khoom siv hluav taws xob ntawm txhua qhov kawg ntawm cov khoom thiab cov vaj tsev uas muaj cov khoom siv thiab cov wiper. Lub ntsiab tiv thaiv ntawm lub potentiometer feem ntau yog ua los ntawm graphite.
Muaj ob hom potentiometers siv hauv cov khoom siv hluav taws xob hu ua linear taper potentiometers thiab logarithmic potentiometers. Potentiometers yog siv rau hauv kev tswj lub suab rau kev tswj cov khoom siv suab, hloov suab nrov, zaus attenuation thiab lwm yam ntxwv ntawm lub suab teeb liab. Hauv TV, lawv tau siv yav dhau los los tswj cov duab ci, qhov sib piv thiab xim teb.
Rheostat
Rheostats feem ntau yog siv los sib txawv ntawm qhov kev tawm tsam hauv ib lub voj voog. Nws yog ob lub davhlau ya nyob twg hloov pauv tau resistor. Muaj ob txoj hauv kev los txhim kho rheostat. Ib tug yog winding ib tug kuj hlau nyob ib ncig ntawm ib tug semicircular insulator nrog lub wiper zawv zawg los ntawm ib tug tig ntawm cov hlau mus rau lub tom ntej no. Lwm txoj hauv kev yog winding ib qho hluav taws xob tiv thaiv ntawm lub tog raj kheej uas tsis muaj cua sov, nrog lub slider ua los ntawm ntau tus ntiv tes hlau uas tuav maj mam mus rau ib feem me me ntawm cov lem ntawm cov hlau tsis kam.
Cov rheostats no yog siv rau hauv DC tsav tsav, hluav taws xob vuam tswj, lossis hauv kev tswj rau cov tshuab hluav taws xob. Muaj lwm hom rheostat uas yog hu ua kua lossis ntsev dej rheostat. Lawv tau siv dav los ntawm cov tshuab hluav taws xob sib dhos vim tias lawv muaj lub zog sib koom ua ke.
Y Potentiometer vs Rheostat
