A cikin jerin da'irarKayan lantarki na DC, halin yanzu a kowane batu iri ɗaya ne, kuma kewayawa yana buƙatar yin aiki tare da m halin yanzu.Matukar ana sarrafa abin da ke gudana ta bangaren guda ɗaya a cikin jerin da'irar, ana iya samun ci gaba da fitarwa na yanzu da muke sarrafawa.
Ƙaƙwalwar kewayawa mai sauƙi na yanzu, yawanci ana amfani dashi a aikace-aikace tare da ƙananan wuta da ƙananan buƙatu.A wasu aikace-aikace, wannan da'ira ba ta da ƙarfi, kamar: lokacin da ƙarfin shigarwar ya kasance 1V kuma abin shigar yana 30A.
Wannan buƙatun ba zai iya ba da garantin aikin kwata-kwata ba, kuma ba shi da matuƙar dacewa da kewaye don daidaita yanayin fitarwa.
Ɗayan da'irori na yau da kullum da aka fi amfani da su, irin wannan kewaye yana da sauƙi don samun daidaitattun ƙididdiga na yanzu, R3 shine resistor samfurin, kuma VREF sigina ce da aka bayar.
Ka'idar aiki na kewaye ita ce, an ba da siginar VREF: Lokacin da ƙarfin lantarki akan R3 ya kasa da VREF, wato, -IN na OP07 ya kasa da + IN, an ƙara fitowar OP07, don haka MOS ya karu. kuma halin yanzu na R3 ya karu;
Lokacin da ƙarfin lantarki akan R3 ya fi VREF girma, -IN ya fi + IN, kuma OP07 yana rage fitarwa, wanda kuma yana rage yawan abin da ke kan R3, ta yadda za'a iya kiyaye da'irar a kan ƙimar da aka ba da ita akai-akai, wanda kuma yana gane halin yanzu akai-akai. aiki;
Lokacin da aka ba da VREF shine 10mV kuma R3 shine 0.01 ohm, madaidaicin halin yanzu na kewaye shine 1A, ana iya canza ƙimar halin yanzu ta canza VREF, ana iya daidaita VREF ta potentiometer ko ana iya amfani da guntu DAC don sarrafawa. shigar da MCU,
Za'a iya daidaita fitarwar halin yanzu da hannu ta amfani da potentiometer.Idan an yi amfani da shigarwar DAC, za a iya gane nauyin lantarki na yau da kullum mai sarrafa na dijital.Kafaffen shimfidar wuri
Saita kafaffen faɗi da tsayi akan mashin kayan aiki.Za a iya saita bango don haɗawa.Yana iya daidaita hoton bangon baya da rubutu da yin samfuri na kanku.
Tabbatar da simintin kewayawa:
Wutar lantarki na dindindin
Sauƙaƙe madaurin wutar lantarki, kawai amfani da Zener diode.
Wutar shigar da wutar lantarki yana iyakance ga 10V, kuma madaurin wutar lantarki na yau da kullun yana da matukar amfani idan aka yi amfani da shi don gwada caja.Za mu iya sannu a hankali daidaita ƙarfin lantarki don gwada martani daban-daban na caja.
Ana rarraba wutar lantarki akan bututun MOS ta R3 da R2 kuma an aika zuwa amplifier mai aiki IN+ don kwatanta da ƙimar da aka bayar.Kamar yadda aka nuna a cikin adadi, lokacin da potentiometer ya kasance a 10%, IN- shine 1V, to, ƙarfin lantarki akan bututun MOS ya kamata ya zama 2V.
Da'irar juriya akai-akai
Don aikin juriya akai-akai, a cikin wasu ƙididdiga masu sarrafawakayan lantarki, Ba a keɓance keɓance na musamman ba, amma ana ƙididdige na yanzu ta hanyar ƙarfin shigarwar da MCU ta gano bisa tsarin da'ira na yau da kullun, don cimma manufar aikin juriya akai-akai.
Misali, lokacin da juriya akai-akai shine 10 ohms, kuma MCU ta gano cewa ƙarfin shigarwar shine 20V, zai sarrafa abin da ake fitarwa ya zama 2A.
Koyaya, wannan hanyar tana da jinkirin amsawa kuma ta dace kawai don lokatai inda shigarwar ta canza sannu a hankali kuma buƙatun ba su da yawa.Ƙwararrun juriya akai-akaikayan lantarkiana gane su ta hanyar hardware.
Da'irar wutar lantarki
Ayyukan wuta na dindindin Yawancinkayan lantarkiana aiwatar da su ta hanyar da'ira na yau da kullun.Ka'idar ita ce MCU tana ƙididdige fitarwar halin yanzu bisa ga ƙimar ƙarfin da aka saita bayan ƙaddamar da ƙarfin shigarwar.
Lokacin aikawa: Oktoba-19-2022
