Mapurojekiti mazhinji einjiniya emagetsi anopedzwa pabhodhi regomba, asi pane chiitiko chekubatanidza netsaona zviteshi zvakanaka uye zvisina kunaka zvemagetsi, izvo zvinotungamira kune zvakawanda zvemagetsi zvinopisa, uye kunyangwe bhodhi rose rinoparadzwa, uye rinofanira kuve welded zvakare, handizive 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 1,000? Zvakadini ne10 000? Panguva ino zvakaoma kutaura, nekuda kwekusava nehanya kwedu, zvichitungamirira kune zvimwe zvikamu zvemagetsi uye machipisi zvakapiswa, chikonzero chikuru ndechekuti ikozvino yakawandisa mumiriri zvikamu zvakaputsika, saka tinofanira kutora matanho ekudzivirira reverse connection. .
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 iine kudonhedza kwe 0.6 ~ 0.8V, iyo germanium diode inewo kudonhedza kudonhedza kunosvika 0.2 ~ 0.4V, kana kudonhedza kudonha kwakakurisa, iyo MOS chubhu inogona kushandiswa kurapa-anti-reaction. kudonha kwekumanikidza kweMOS chubhu idiki kwazvo, kusvika kune mashoma miliohm, uye kudonha kwekumanikidza kunenge kusingaite.
03 MOS chubhu inopesana-reverse kudzivirira wedunhu
MOS chubhu nekuda kwekuvandudzwa kwemaitiro, zvivakwa zvayo uye zvimwe zvinhu, kuita kwayo kwemukati kuramba kudiki, mazhinji ari milliohm nhanho, kana kunyange idiki, zvekuti kudonha kwemagetsi edunhu, kurasikirwa kwesimba kunokonzerwa nedunhu kunonyanya kudiki, kana kusingakodzeri. , 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. Iko kukwanisa kweiyo S inenge yeVbat-0.6V, nepo kukwanisa kwegedhi G iri 0. Mhepo yekuzarura yeMOS tube yakanyanyisa: Ugs = 0 - (Vbat-0.6), gedhi rinoita seyakaderera. , iyo ds yePMOS iripo, iyo parasitic diode ipfupi-inotenderera, uye sisitimu inoumba loop kuburikidza ne ds kuwana kwePMOS.
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.
Kuwanikwa 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 kuS. danda, uye zvakapesana ndezvechokwadi pazvinoshandiswa 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
Zvizhinji zvinowanzoitika zvemagetsi zvigadzirwa zvinogona kuonekwa mushure mekuvhura chikamu chemagetsi ne fuse, mumagetsi emagetsi anodzoserwa, kune pfupi pfupi mudenderedzwa nekuda kwekukura kukuru, uye ipapo fuse inoputika, inoita basa mukudzivirira redunhu, asi nzira iyi kugadzirisa uye kutsiva kunonyanya kunetsa.
Nguva yekutumira: Jul-10-2023
