Zomangamanga Zoyambira za DC Electronic Loads

M'magawo angapo aDC electronic load, panopa pa mfundo iliyonse ndi yofanana, ndipo dera liyenera kugwira ntchito nthawi zonse.Malingana ngati zomwe zikuchitika mu gawo limodzi zimayendetsedwa mumayendedwe a mndandanda, nthawi zonse zomwe timazilamulira zimatha kutheka.

Dongosolo losavuta lokhazikika, lomwe nthawi zambiri limagwiritsidwa ntchito ndi mphamvu zochepa komanso zofunikira zochepa.M'zinthu zina, dera ili ndi lopanda mphamvu, monga: pamene magetsi olowera ndi 1V ndipo magetsi ndi 30A,

Chofunikira ichi sichingatsimikizire ntchitoyo konse, ndipo sikoyenera kwambiri kuti dera lisinthe zomwe zikuchitika.

Chimodzi mwazinthu zomwe zimagwiritsidwa ntchito nthawi zonse, dera lotereli ndi losavuta kupeza zokhazikika komanso zolondola pakalipano, R3 ndi sampling resistor, ndipo VREF ndi chizindikiro choperekedwa.

Mfundo yoyendetsera dera ndi, kupatsidwa chizindikiro cha VREF: Pamene voteji pa R3 ili yochepa kuposa VREF, ndiye kuti, -IN ya OP07 ndi yochepa kuposa + IN, kutulutsa kwa OP07 kumawonjezeka, kotero kuti MOS ikuwonjezeka. ndipo panopa R3 yawonjezeka;

Pamene voteji pa R3 ndi wamkulu kuposa VREF, -IN ndi wamkulu kuposa + IN, ndipo OP07 amachepetsa linanena bungwe, amenenso amachepetsa panopa pa R3, kotero kuti dera potsiriza anakhalabe pa mtengo nthawi zonse, amenenso amazindikira nthawi zonse panopa. ntchito;

Pamene VREF yoperekedwa ndi 10mV ndi R3 ndi 0.01 ohm, nthawi zonse ya dera ndi 1A, mtengo wamakono ukhoza kusinthidwa mwa kusintha VREF, VREF ikhoza kusinthidwa ndi potentiometer kapena chipangizo cha DAC chingagwiritsidwe ntchito kulamulira. zomwe zaperekedwa ndi MCU,

Zomwe zimatuluka zimatha kusinthidwa pamanja pogwiritsa ntchito potentiometer.Ngati cholowetsa cha DAC chikugwiritsidwa ntchito, katundu wamagetsi woyendetsedwa ndi digito amatha kuzindikirika.Masanjidwe okhazikika

Khazikitsani m'lifupi ndi kutalika kokhazikika pazida.Kumbuyo kumatha kukhazikitsidwa kuti kuphatikizidwe.Ikhoza kugwirizanitsa bwino chithunzi chakumbuyo ndi malemba ndikupanga template yanu.

Kutsimikizira kayeseleledwe kozungulira:

Nthawi zonse ma voltage circuit

Njira yosavuta yosinthira magetsi, ingogwiritsani ntchito Zener diode.

Magetsi olowera amangokhala 10V, ndipo ma voliyumu okhazikika amakhala othandiza kwambiri akamayesa charger.Titha kusintha pang'onopang'ono mphamvu yamagetsi kuyesa mayankho osiyanasiyana a charger.

Mphamvu yamagetsi pa chubu ya MOS imagawidwa ndi R3 ndi R2 ndikutumizidwa ku amplifier IN + kuti ifanane ndi mtengo womwe wapatsidwa.Monga momwe tawonetsera pachithunzichi, pamene potentiometer ili pa 10%, IN- ndi 1V, ndiye kuti magetsi pa chubu cha MOS ayenera kukhala 2V.

Nthawi zonse kukana dera

Pakuti mosalekeza kukana ntchito, ena manambala ankalamulirakatundu wamagetsi, palibe dera lapadera lomwe limapangidwira, koma zamakono zimawerengedwa ndi magetsi olowera omwe amapezeka ndi MCU pamaziko a dera lokhazikika, kuti akwaniritse cholinga cha ntchito yotsutsa nthawi zonse.

Mwachitsanzo, kukana kosalekeza ndi 10 ohms, ndipo MCU imazindikira kuti voliyumu yolowera ndi 20V, imayang'anira kutulutsa kwapano kukhala 2A.

Komabe, njirayi imayankha pang'onopang'ono ndipo ndi yoyenera pazochitika zomwe zolowetsazo zimasintha pang'onopang'ono ndipo zofunikira sizikhala zapamwamba.Professional mosalekeza kukanakatundu wamagetsiamapangidwa ndi hardware.

Nthawi zonse mphamvu yozungulira

Nthawi zonse mphamvu ntchito Kwambirikatundu wamagetsiamatsatiridwa ndi chigawo chanthawi zonse.Mfundo ndi yakuti MCU imawerengera zomwe zimachokera panopa malinga ndi mtengo wamagetsi omwe aikidwa pambuyo poyesa magetsi olowera.