Ndeapi mamiriro ekushandisa eMOSFETs?

MOSFETs anoshandiswa zvakanyanya mumaseketi eanalogi uye edhijitari uye ane hukama zvakanyanya nehupenyu hwedu.Zvakanakira zveMOSFET ndezvekuti: dhiraivha yedhiraivha iri nyore.MOSFETs inoda dhiraivha shoma ikozvino kupfuura BJTs, uye kazhinji inogona kufambiswa zvakananga neCMOS kana yakavhurika muunganidzi. TTL mutyairi maseketi. Chechipiri, maMOSFET anochinja nekukurumidza uye anogona kushanda nekumhanya kwepamusoro nekuti hapana chekuchengeta mhedzisiro. Uye zvakare, maMOSFET haana yechipiri kuparara kutadza michina. Iyo yakakwirira tembiricha, kazhinji iyo yakasimba kutsungirira, inoderedza mukana wekuputsika kwekupisa, asiwo mune yakafara tembiricha siyana kuti ipe zvirinani kuita.MOSFETs yakashandiswa munhamba huru yezvikumbiro, mumagetsi evatengi, zvigadzirwa zveindasitiri, electromechanical. midziyo, mafoni akangwara uye zvimwe zvinotakurika zvemagetsi zvigadzirwa zvemagetsi zvinogona kuwanikwa kwese.

MOSFET application kesi kuongororwa

1, Kuchinja magetsi ekushandisa

Netsanangudzo, iyi application inoda kuti MOSFETs iite uye ivhare nguva nenguva. Panguva imwecheteyo, kune akawanda ematologies anogona kushandiswa kushandura magetsi, senge DC-DC magetsi emagetsi anowanzo shandiswa mune yekutanga buck convert inotsamira pamaMOSFET maviri kuti aite switching basa, idzi switch dzakachinjika muinductor kuchengetedza. simba, uye wozovhura simba kumutoro. Parizvino, vagadziri vanowanzo sarudza ma frequency mumazana ekHz uye kunyangwe pamusoro pe1MHz, nekuda kwekuti iyo yakakwira frequency, idiki uye yakareruka iyo magineti zvikamu. Yechipiri yakakosha MOSFET paramita mukuchinja magetsi inosanganisira inobuda capacitance, chikumbaridzo voltage, gedhi impedance uye avalanche simba.

2, motor control application

Motor control applications ndeimwe nzvimbo yekushandisa yemagetsiMOSFETs. Yakajairika hafu-bhiriji kutonga maseketi anoshandisa maviri MOSFETs (yakazara-bhiriji inoshandisa ina), asi maviri MOSFETs kure nenguva (nguva yekufa) akaenzana. Kune iyi application, iyo reverse kudzoreredza nguva (trr) yakakosha. Paunenge uchidzora inductive mutoro (senge mota inotenderera), dunhu rekutonga rinochinja MOSFET mubhiriji redunhu kuenda kune iyo off state, panguva iyo imwe switch mubhiriji redunhu kwechinguva inodzosera iripo kuburikidza nemuviri diode muMOSFET. Nokudaro, ikozvino inotenderera zvakare uye inoramba ichisimbisa motokari. Kana MOSFET yekutanga ichiita zvakare, mutero wakachengetwa mune imwe MOSFET diode inofanira kubviswa uye kuburitswa kuburikidza neMOSFET yekutanga. Uku kurasikirwa kwesimba, saka iyo ipfupi trr, idiki kurasikirwa.

3, zvikumbiro zvemotokari

Iko kushandiswa kwesimba MOSFETs mumotokari kunyorera kwakakura nekukurumidza mumakore makumi maviri apfuura. SimbaMOSFETinosarudzwa nekuti inokwanisa kumira kwenguva pfupi yakakwira-voltage phenomena inokonzerwa neyakajairwa mota dzemagetsi masisitimu, senge load shedding uye kamwe kamwe shanduko musimba rehurongwa, uye pasuru yayo iri nyore, kunyanya kushandisa TO220 uye TO247 mapakeji. Panguva imwecheteyo, zvikumbiro zvakaita semahwindo emagetsi, jekiseni remafuta, wiper dzinopindirana, uye kudzora rwendo zvishoma nezvishoma zviri kuita zvakajairika mumotokari zhinji, uye midziyo yemagetsi yakafanana inodiwa mukugadzira. Munguva iyi, simba remotokari MOSFETs rakashanduka semotor, solenoids, uye majekiseni emafuta zvakawedzera kufarirwa.

MOSFETs anoshandiswa mumidziyo yemotokari inovhara huwandu hwakawanda hwemagetsi, mafungu, uye-kupokana. Mota dzinodzora zvigadziriso zvebhiriji zvigadziriso uchishandisa 30V uye 40V yekuputsa magetsi modhi, 60V zvishandiso zvinoshandiswa kutyaira mitoro uko kamwe kamwe kurodha kurodha uye kusimuka kwekutanga mamiriro kunofanirwa kudzorwa, uye 75V tekinoroji inodiwa kana indasitiri chiyero ichichinjirwa kune 42V bhatiri masisitimu. Midziyo yepamusoro yekubatsira magetsi inoda kushandiswa kwemamodhiyo e100V kusvika ku150V, uye midziyo yeMOSFET iri pamusoro pe400V inoshandiswa mumayuniti emutyairi weinjini uye maseketi ekudzora emarambi emusoro ane simba guru (HID).

Motokari MOSFET dhiraivha madhiri anotangira pa2A kusvika pamusoro pe100A, ine-kupikisa kubva pa2mΩ kusvika pa100mΩ. Mitoro yeMOSFET inosanganisira mota, mavharuvhu, marambi, zvinhu zvinodziya, capacitive piezoelectric assemblies uye DC/DC magetsi. Kuchinja ma frequency anowanzo kubva pa10kHz kuenda pa100kHz, ine caveat yekuti mota control haina kukodzera kushandura ma frequency ari pamusoro pe20kHz. Zvimwe zvinonyanya kudiwa kuita kweUIS, mamiriro ekushanda pajoinction tembiricha (-40 madhigirii kusvika 175 madhigirii, dzimwe nguva kusvika 200 madhigirii) uye kuvimbika kwakanyanya kupfuura hupenyu hwemotokari.

4, mwenje we LED uye mwenje mutyairi

Mukugadzirwa kwemarambi e LED uye marambi anowanzo shandisa MOSFET, ye LED inogara iripo mutyairi, kazhinji inoshandisa NMOS. simba MOSFET uye bipolar transistor inowanzosiyana. Iro gedhi capacitance yakakura. Iyo capacitor inoda kubhadhariswa isati yaitwa. Kana iyo capacitor voltage ichipfuura chikumbaridzo voltage, iyo MOSFET inotanga kuitisa. Naizvozvo, zvakakosha kucherechedza panguva yekugadzira kuti mutoro wemutyairi wegedhi unofanirwa kuve wakakura zvakakwana kuti uve nechokwadi chekuti kubhadharisa kweiyo yakaenzana gedhi capacitance (CEI) inopedzwa mukati menguva inodiwa nehurongwa.

Iyo yekumhanyisa yekumhanyisa yeMOSFET inotsamira zvakanyanya pakuchaja uye kuburitsa kweiyo yekuisa capacitance. Kunyangwe mushandisi asingakwanise kudzikisa kukosha kweCin, asi anogona kuderedza kukosha kwegedhi dhiraivha loop chiratidzo chemukati kuramba Rs, nekudaro kuderedza gedhi loop kuchaja uye kuburitsa nguva isingachinjiki, kukurumidza kukurumidza kushandura, iyo general IC drive kugona. rinonyanya kuratidzwa pano, tinoti sarudzo yeMOSFETinoreva kune yekunze MOSFET drive inogara-yazvino ICs. yakavakirwa-mukati MOSFET ICs haidi kutariswa. Kazhinji kutaura, iyo yekunze MOSFET inozotariswa kune yazvino inodarika 1A. Kuti uwane yakakura uye inochinjika simba re LED, iyo yekunze MOSFET ndiyo chete nzira yekusarudza iyo IC inoda kufambiswa nekugona kwakakodzera, uye iyo MOSFET yekupinza capacitance ndiyo yakakosha parameter.