Mazhinji mapurojekiti einjiniya einjiniya anopedzwa pabhodhi regomba, asi pane chiitiko chekubatanidza netsaona materminal akanaka uye asina kunaka emagetsi, izvo zvinotungamira kune akawanda emagetsi zvikamu zvinopisa, uye kunyangwe bhodhi rose rinoparadzwa, uye rinofanirwa kusungirirwa zvakare, handizivi kuti ndeipi nzira yakanaka yekuigadzirisa?
Chokutanga pane zvose, kusava nehanya hakudzivisiki, kunyange zvazvo kuri kungosiyanisa zvakanaka uye zvisina kunaka waya mbiri, tsvuku uye dema, inogona kuvharwa kamwe chete, hatingaiti zvikanganiso; Kubatana gumi hakuzokanganise, asi chiuru? Zvakadini ne10 000? Panguva ino zvakaoma kutaura, nekuda kwekusava nehanya kwedu, kunotungamirira kune zvimwe zvikamu zvemagetsi uye machipisi akapiswa kunze, chikonzero chikuru ndechokuti ikozvino yakawandisa mumiriri zvikamu zvakaputsika, saka tinofanira kutora matanho kudzivirira reverse kubatana.
Kune nzira dzinotevera dzinowanzo shandiswa:
01 diode akatevedzana mhando anti-reverse kudzivirira wedunhu
Diode yekumberi yakabatana munhevedzano pane yakanaka simba rekuisa kuti ishandise zvizere maitiro eiyo diode yekumberi conduction uye reverse cutoff. Mumamiriro ezvinhu akajairika, iyo yechipiri chubhu inoitisa uye bhodhi redunhu rinoshanda.
Apo simba rinogadziriswa, diode inogurwa, simba remagetsi harigoni kuumba loop, uye bhodhi redunhu harishandi, iro rinogona kudzivirira zvinobudirira dambudziko remagetsi.
02 Rectifier bhiriji mhando anti-reverse kudzivirira wedunhu
Shandisa bhiriji rekugadziridza kuti uchinje iyo yekuisa simba kuita isiri-polar yekuisa, ingave iyo magetsi yakabatana kana kudzoserwa kumashure, bhodhi rinoshanda zvakajairika.
Kana iyo silicon diode ine kudonhedzwa kwemhepo inosvika 0.6 ~ 0.8V, iyo germanium diode inewo dhizaini inodonha inosvika 0.2 ~ 0.4V, kana kudonha kwekumanikidza kwakanyanya, chubhu yeMOS inogona kushandiswa kurapa anti-reaction, kudonhedza kudonhedza kweMOS chubhu kudiki kwazvo, kusvika kune mashoma milliohm, uye kudonha kunenge kusingagoneki.
03 MOS chubhu inopesana-reverse kudzivirira wedunhu
MOS chubhu nekuda kwekuvandudzwa kwemaitiro, ayo ega uye zvimwe zvinhu, kuitisa kwayo kwemukati kushomeka kudiki, mazhinji ari milliohm nhanho, kana kunyange madiki, kuitira kuti redunhu voltage donhwe, kurasikirwa kwemagetsi kunokonzerwa nedunhu kunonyanya kudiki, kana kutoregeredza, saka sarudza MOS chubhu kuchengetedza dunhu inzira inokurudzirwa.
1) NMOS dziviriro
Sezvinoratidzwa pazasi: Panguva yekuvheneka simba, iyo parasitic diode yeMOS chubhu inobatidzwa, uye sisitimu inoumba loop. Iko kugona kweiyo sosi S ndeye 0.6V, nepo kugona kwegedhi G iri Vbat. Mhepo yekuvhura yeMOS chubhu yakanyanyisa: Ugs = Vbat-Vs, gedhi rakakwira, ds yeNMOS iripo, diode yeparasitic ipfupi-inotenderera, uye sisitimu inoumba loop kuburikidza ne ds kupinda kweNMOS.
Kana simba rekushandisa rakashandurwa, iyo-voltage yeNMOS ndeye 0, iyo NMOS inogurwa, diode yeparasitic inodzoserwa, uye dunhu rinobviswa, nokudaro rinogadzira kudzivirira.
2) PMOS dziviriro
Sezvinoratidzwa pazasi: Panguva yekuvheneka simba, iyo parasitic diode yeMOS chubhu inobatidzwa, uye sisitimu inoumba loop. Izvo zvingave zvechitubu S ndezveVbat-0.6V, nepo mukana wegedhi G ndeye 0. Mhepo yekuvhura yeMOS tube yakanyanyisa: Ugs = 0 - (Vbat-0.6), gedhi rinoita seyakaderera, ds ye PMOS iripo, diode yeparasitic ipfupi-inotenderera, uye hurongwa hunoumba chiuno chePMOS.
Kana simba remagetsi richishandurwa, iyo-voltage yeNMOS yakakura kudarika 0, PMOS inogurwa, diode yeparasitic inodzoserwa, uye dunhu rinobviswa, nokudaro rinogadzira kudzivirira.
Ongorora: NMOS machubhu tambo ds kune iyo yakaipa electrode, PMOS machubhu tambo ds kune yakanaka electrode, uye iyo parasitic diode kutungamira yakananga kune yakanyatso kubatanidza yazvino nzira.
Kupinda kweiyo D uye S matanda eMOS chubhu: kazhinji kana iyo MOS chubhu ine N chiteshi ichishandiswa, ikozvino kazhinji inopinda kubva paD danda uye inoyerera ichibuda kubva paS, uye PMOS inopinda uye D inobuda kubva paS pole, uye zvinopesana ichokwadi kana ikashandiswa mudunhu iri, iyo voltage mamiriro eMOS chubhu inosangana kuburikidza nekuitisa kweparasitic diode.
Iyo MOS chubhu ichabatidzwa zvizere sekureba kwakakodzera voltage yakamiswa pakati peG neS pole. Mushure mekuitisa, zvinoita senge switch yakavharwa pakati peD neS, uye yazvino ndiyo yakafanana kuramba kubva kuD kuenda kuS kana S kuenda kuD.
Mumashandisirwo anoshanda, iyo G pole inowanzobatanidzwa neanopikisa, uye kuitira kudzivirira iyo MOS chubhu kuti isaputswe, voltage regulator diode inogona zvakare kuwedzerwa. A capacitor yakabatanidzwa mukuenderana kune divider ine nyoro-yekutanga maitiro. Panguva iyo ikozvino inotanga kuyerera, iyo capacitor inobhadharwa uye voltage yeG pole inovakwa zvishoma nezvishoma.
Kune PMOS, kana ichienzaniswa neNOMS, Vgs inodiwa kuti ive yakakura kudarika chikumbaridzo voltage. Nekuti magetsi ekuvhura anogona kuve 0, mutsauko wekumanikidza pakati peDS hauna hombe, iyo inobatsira kupfuura NMOS.
04 Fuse dziviriro
Zvigadzirwa zvakawanda zvemagetsi zvinowanzoitika zvinogona kuonekwa mushure mokuzarura chikamu chemagetsi nefiyuzi, mumagetsi emagetsi anodzoserwa shure, kune pfupi pfupi munharaunda yedunhu nekuda kwekukura kukuru, uye ipapo fiyuzi inoputika, inoita basa rekudzivirira dunhu, asi nzira iyi kugadzirisa uye kutsiva kunonyanya kunetsa.
Nguva yekutumira: Jul-08-2023
