nkhani

      Kusintha mphamvuZopereka zimagwiritsidwa ntchito kwambiri popanga ndi moyo, ndipo ndizofunikira kwambiri pakupanga zinthu zamagetsi.Mphamvu yosinthira ndi yaying'ono, yopepuka komanso yothandiza, koma kodi muyenera kudziwa bwino magetsi osinthira?Nkhaniyi ifotokoza tanthauzo la kusintha magetsi komanso mfundo yosinthira magetsi mwatsatanetsatane kuti ikuthandizireni bwino kusintha magetsi.
Choyamba, kodi magetsi osinthira ndi chiyani.
Kusintha kwamagetsi ndiko kugwiritsa ntchito zida zosinthira (monga machubu a elekitironi, ma transistors ammunda, thyristor thyristors, etc.), malinga ndi loop yowongolera, zida zosinthira zimalumikizidwa mosalekeza ndikuzimitsidwa.
Mphamvu yosinthira imagwirizana ndi mphamvu yamagetsi.Pulagi yake yolumikizira nthawi yomweyo imatembenuza chowongolera cha AC kukhala magetsi a DC, kenako, mothandizidwa ndi ma frequency a frequency resonant circuit, amagwiritsa ntchito chosinthira magetsi kuti azitha kuyendetsa mphamvu ya AC kuti apange mafunde apamwamba kwambiri. .Mothandizidwa ndi inductor (transformer coil), magetsi otsika otsika kwambiri a DC amatuluka.Chifukwa mafotokozedwe apakati a thiransifoma ndi osagwirizana ndi mita lalikulu la mphamvu yotulutsa, kukweza pafupipafupi, kumachepetsa pachimake cha thiransifoma.Izi zitha kuchepetsa kwambiri thiransifoma ndikuchepetsa kulemera konse ndi kuchuluka kwamagetsi.Ndipo, chifukwa nthawi yomweyo imagwiritsa ntchito DC, magetsi amtundu uwu ndi abwino kwambiri kuposa magetsi opangira magetsi.Izi zimapulumutsa mphamvu zamagetsi ndipo motero zimatchuka kwambiri ndi ife.Koma ilinso ndi zolakwika.Njira yosinthira magetsi ndiyovuta, kukonza ndizovuta, komanso kuyipitsa kwa chilengedwe kwa dera loperekera magetsi ndikovuta kwambiri.Mphamvu zamagetsi zimakhala zaphokoso, ndipo zimakhala zovuta kugwiritsa ntchito mabwalo amagetsi opanda phokoso.
Mphamvu zamagetsi zofananira poyamba zimachepetsa matalikidwe a voteji ya AC molingana ndi thiransifoma, kenako ndikupeza magetsi amtundu umodzi wa DC molingana ndi rectifier rectifier circuit rectifier, kenako ndikupeza magetsi a DC okhala ndi voteji yaying'ono malinga ndi kusefa.Kuti mukwaniritse bwino mphamvu yamagetsi ya DC yolondola kwambiri, ndikofunikira kupanga chubu cha Zener molingana ndi dera loyendetsedwa ndi magetsi.
Chachiwiri, mfundo yosinthira magetsi.
Njira yonse yogwirira ntchito yosinthira magetsi ndiyosavuta kumvetsetsa.Mu liniya magetsi, pangani linanena bungwe mphamvu chubu netiweki ntchito.Mosiyana ndi magetsi oyendera mizere, magetsi osinthira a PWM amasunga machubu amagetsi otuluka ndi kuzimitsa.Pazigawo ziwirizi, kuchulukitsa kwa volt-ampere komwe kumawonjezeredwa pa chubu chamagetsi ndikochepa kwambiri (voltage ndi yotsika ndipo yapano ndi yayikulu ikazimitsidwa; voteji ndi yayikulu ndipo yapano ndi yaying'ono ikazimitsidwa. ) / volt-ampere pa chipangizo chamagetsi chamagetsi Kuchulukitsa kwa ma curve odziwika ndikuwonongeka kwa zida zotulutsa mphamvu za semiconductor.
Poyerekeza ndi liniya magetsi, ndi wololera ntchito ulalo wa PWM kusintha magetsi anamaliza malinga ndi inverter, ndi DC voteji kuti alowetse amadulidwa mu umodzi pulse voteji amene matalikidwe mtengo ndi wofanana athandizira voteji matalikidwe mtengo. .
Chachitatu, ubwino ndi kuipa kwa kusintha magetsi:
Ubwino wapadera wosinthira magetsi: kukula kwakung'ono, kulemera kopepuka (voliyumu ndi kulemera kwathunthu ndi 20-30% yokha yamagetsi amagetsi), kuyendetsa bwino kwambiri (nthawi zambiri 60 ~ 70%, pomwe magetsi amzere ndi 30 ~ 40% okha). , Anti-Wamphamvu kusokoneza mphamvu, lonse linanena bungwe voteji kuphimba, modular mapangidwe.
Zowonongeka zenizeni za magetsi osinthira: chifukwa chowongolera chowongolera chimayambitsa ma voliyumu apamwamba kwambiri, chimakhudzanso malo ozungulira.Kutetezedwa bwino ndi kuyika pansi kuyenera kusamalidwa.
Mphamvu ya AC imatha kudutsa pokonzanso kuti ipeze mphamvu ya DC.Monga aliyense akudziwa, chifukwa cha kusintha kwa magetsi a AC ndi katundu wamakono, magetsi a DC omwe amapezeka pambuyo pokonzanso nthawi zambiri amayambitsa kusintha kwa 20% mpaka 40%.Kuti mukhale ndi magetsi okhazikika a DC, onetsetsani kuti mukugwiritsa ntchito dera loyendera magetsi kuti mumalize zener chubu.Malinga ndi njira zosiyanasiyana zomalizitsira, magetsi owongolera ma chubu amatha kugawidwa m'mitundu itatu: magetsi owongolera machubu amagetsi, magetsi oyendetsedwa ndi gawo loyang'anira magetsi ndikusintha magetsi owongolera chubu.Kusintha magetsi kumatanthawuza chitukuko cha chitetezo cha chilengedwe chobiriwira komanso magetsi abwino kwambiri.
Chachinayi, mavuto wamba posankha kusintha magetsi.
(1) Sankhani mtundu woyenera wa voteji;
(2) Sankhani mphamvu yotulutsa yoyenera.Kuti muwonjezere bwino moyo wamagetsi, mutha kusankha chitsanzo chokhala ndi mphamvu yopitilira 30%.
(3) Poganizira za katundu.Ngati katunduyo ndi injini, babu kapena capacitor katundu, ndipo panopa ndi yaikulu panthawi yogwira ntchito, magetsi oyenera ayenera kusankhidwa kuti ateteze katunduyo.Ngati katunduyo ndi mota, kutembenuka kwamagetsi pakuyimitsa kuyenera kuganiziridwa.
(4) Kuphatikiza apo, kutentha kwamagetsi kwamagetsi komanso ngati kuli ndi zida zoziziritsira zowonjezera zowonjezera ziyenera kuganiziridwanso.Kuchuluka kwa mphamvu yozindikira kutentha kuyenera kuchepetsa kutulutsa.Mpweya wochepetsera kutentha.
(5) Ntchito zosiyanasiyana ziyenera kusankhidwa malinga ndi ntchito:
Ntchito zosamalira: Kutetezedwa kwa Voltage (OVP), Kuteteza Kutentha (OTP), Kutetezedwa Kupitilira Voltage (OLP), ndi zina.
Ntchito zogwiritsira ntchito: ntchito ya chizindikiro cha data (kugawa mphamvu kwanthawi zonse, kugawa mphamvu kosavomerezeka), ntchito yoyang'anira kutali, ntchito yowunikira, ntchito yolumikizira yofananira, ndi zina zambiri.
Zapadera: Power Factor Correction (PFC), Continuous Power (UPS)
Sankhani zofunikira zachitetezo ndi chitsimikiziro cha EMC performance (EMC).