Kodi pali kusiyana kotani pakati pa inverter overload ndi overcurrent?Kuchulukirachulukira ndi lingaliro la nthawi, zomwe zikutanthauza kuti katunduyo amaposa katundu wowerengedwa ndi angapo angapo mu nthawi yopitilira.Lingaliro lofunika kwambiri la kulemetsa ndi nthawi yopitilira.Mwachitsanzo, kuchulukirachulukira kwa ma frequency converter ndi 160% kwa mphindi imodzi, ndiye kuti, palibe vuto kuti katunduyo amafika nthawi 1.6 kuchuluka kwa mphindi imodzi mosalekeza.Ngati katunduyo atakhala wocheperako mwadzidzidzi mumasekondi a 59, ndiye kuti alamu yodzaza kwambiri sidzayamba.Pokhapokha masekondi 60, alamu yodzaza kwambiri idzayambika.Overcurrent ndi lingaliro lachulukidwe, lomwe limatanthawuza kuti kangati katunduyo amaposa katundu woyengedwa mwadzidzidzi.Nthawi ya overcurrent ndi yaifupi kwambiri, ndipo kuchulukitsa kumakhala kwakukulu kwambiri, nthawi zambiri kuposa khumi kapena kambirimbiri.Mwachitsanzo, pamene galimoto ikuyenda, shaft yamagetsi imatsekedwa mwadzidzidzi, ndiye kuti mphamvu ya galimotoyo idzakwera mofulumira m'kanthawi kochepa, zomwe zimayambitsa kulephera kwakukulu.
Kuchulukirachulukira komanso kuchulukirachulukira ndiye zolakwika zofala kwambiri za otembenuza pafupipafupi.Kuti tisiyanitse ngati ma frequency converter akudutsa-pakali pano kapena akudutsa mochulukira, choyamba tiyenera kumveketsa kusiyana pakati pawo.Nthawi zambiri, kuchulukitsitsa kuyeneranso kukhala kopitilira apo, koma chifukwa chiyani chosinthira pafupipafupi chiyenera kulekanitsa chapano ndi chochulukira?Pali kusiyana kwakukulu kuwiri: (1) zinthu zoteteza zosiyanasiyana Overcurrent makamaka ntchito kuteteza pafupipafupi Converter, pamene overload makamaka ntchito kuteteza galimoto.Chifukwa mphamvu ya ma frequency converter nthawi zina imafunika kuonjezedwa ndi giya limodzi kapena magiya awiri kuposa mphamvu ya mota, pakadali pano, mota ikadzaza, chosinthira pafupipafupi sichimapitilira.Kutetezedwa kochulukira kumayendetsedwa ndi ntchito yamagetsi yoteteza kutentha mkati mwa ma frequency converter.Ntchito yamagetsi yamagetsi ikakhazikitsidwa, "chiwerengero chakugwiritsa ntchito pano" chiyenera kukhazikitsidwa molondola, ndiye kuti, kuchuluka kwa chiwongolero chamagetsi ovotera ndi ma frequency osinthira: IM%=IMN*100 % I/IM Kumene, im% -current magwiritsidwe chiŵerengero;IMN--yovotera mphamvu yamagalimoto, a;IN— ovotera ma frequency converter, a.(2) Kusintha kwazomwe zikuchitika pano ndi kosiyana Kutetezedwa kwa katundu wambiri kumachitika pogwira ntchito pamakina opangira, ndipo kusintha kwa di/dt komweko nthawi zambiri kumakhala kochepa;Kuchulukirachulukira kupatula kulemetsa nthawi zambiri kumakhala mwadzidzidzi, ndipo kusintha kwa di/dt komweko nthawi zambiri kumakhala kwakukulu.(3) Chitetezo chochulukirapo chimakhala ndi nthawi yosiyana.Kuteteza mochulukira kumalepheretsa injini kuti isatenthedwe, chifukwa chake imakhala ndi mawonekedwe a "nthawi yosiyana" yofanana ndi relay yamafuta.Izi zikutanthauza kuti, ngati sizili zambiri kuposa momwe zimakhalira panopa, nthawi yovomerezeka yovomerezeka ikhoza kukhala yaitali, koma ngati ili yochulukirapo, nthawi yovomerezeka idzafupikitsidwa.Kuonjezera apo, pamene mafupipafupi amachepetsa, kutentha kwa injini kumakhala koipitsitsa.Chifukwa chake, pakuchulukira komweku kwa 50%, kutsika kwafupipafupi, kumachepetsa nthawi yovomerezeka yovomerezeka.
Kuthamanga kwafupipafupi kwa ma frequency converter Pakali pano kugwedezeka kwa inverter kumagawidwa kukhala vuto laling'ono, kugwedezeka panthawi yogwira ntchito ndi kuyendayenda panthawi yothamanga ndi kutsika, ndi zina zotero. panthawi yogwira ntchito, koma ngati iyambiranso pambuyo pa kukonzanso, nthawi zambiri imayenda mofulumira pamene liwiro likukwera.(b) Ili ndi mawotchi akuluakulu, koma otembenuza pafupipafupi amatha kuchita chitetezo popanda kuwonongeka.Chifukwa chitetezo chimayenda mwachangu kwambiri, zimakhala zovuta kuziwona zomwe zikuchitika.(2) Chiweruzo ndi kasamalidwe Chinthu choyamba ndicho kuweruza ngati pali dera lalifupi.Pofuna kuwongolera chigamulo, voltmeter ikhoza kulumikizidwa ku mbali yolowera pambuyo pokonzanso komanso musanayambe kuyambiranso.Mukayambiranso, potentiometer idzatembenuka pang'onopang'ono kuchokera ku zero, ndipo nthawi yomweyo, tcherani khutu ku voltmeter.Ngati ma frequency otulutsa a inverter amayenda atangokwera, ndipo pointer ya voltmeter ikuwonetsa zizindikiro zobwerera ku "0" nthawi yomweyo, zikutanthauza kuti kumapeto kwa inverter kwafupikitsidwa kapena kukhazikika.Gawo lachiwiri ndikuweruza ngati inverter ndi yofupikitsidwa mkati kapena kunja.Panthawiyi, kulumikizana kumapeto kwa chosinthira pafupipafupi kuyenera kulumikizidwa, ndiyeno potentiometer iyenera kutembenuzidwa kuti ionjezere pafupipafupi.Ngati imayendabe, zikutanthauza kuti chosinthira pafupipafupi chimakhala chachifupi;Ngati sichikuyendanso, zikutanthauza kuti pali kagawo kakang'ono kunja kwa ma frequency converter.Yang'anani mzere kuchokera pa frequency converter kupita ku mota ndi mota yokha.2, katundu wopepuka wopitilira muyeso ndi wopepuka kwambiri, koma kudumpha mopitilira muyeso: Ichi ndi chodabwitsa cha kusinthasintha kwa liwiro la liwiro.Mumayendedwe owongolera a V / F, pali vuto lodziwika bwino: kusakhazikika kwamagetsi amagetsi amagetsi panthawi yogwira ntchito.Chifukwa chachikulu chagona: Mukathamanga pafupipafupi, kuti muyendetse katundu wolemetsa, kubwezeredwa kwa torque kumafunika nthawi zambiri (ndiko kuti, kukonza chiŵerengero cha U / f, chomwe chimatchedwanso torque boost).Machulukitsidwe a motor maginito circuit amasintha ndi katundu.Izi pa-panopa ulendo chifukwa machulukitsidwe wa galimoto maginito dera makamaka zimachitika pafupipafupi otsika ndi katundu kuwala.Yankho: Sinthani chiŵerengero cha U/f mobwerezabwereza.3, overcurrent overcurrent: (1) Zolakwitsa Makina ena opanga amawonjezera katundu mwadzidzidzi panthawi yogwira ntchito, kapena "kukakamira".Kuthamanga kwa galimoto kumatsika kwambiri chifukwa cha kusasunthika kwa lamba, panopa kumawonjezeka kwambiri, ndipo chitetezo cholemetsa chimakhala chochedwa kwambiri, zomwe zimapangitsa kuti pakhale kugwedezeka.(2) Njira yothetsera (a) Choyamba, fufuzani ngati makinawo ali ndi vuto, ndipo ngati alipo, konzani makinawo.(b) Ngati kuchulukitsitsa kumeneku ndi chinthu chodziwika bwino pakupanga, choyamba ganizirani ngati chiŵerengero cha kufala pakati pa galimoto ndi katundu chikhoza kuwonjezeka?Kuchulukitsa moyenera kuchulukana kwapatsiku kumatha kuchepetsa torque yolimbana ndi shaft yamoto ndikupewa kusasunthika kwa lamba.Ngati chiŵerengero chotumizira sichikhoza kuwonjezeka, mphamvu ya injini ndi ma frequency converter iyenera kuwonjezeredwa.4. Pakalipano panthawi yothamanga kapena kutsika: Izi zimayambitsidwa ndi kuthamanga kwambiri kapena kutsika, ndipo njira zomwe zingatengedwe ndi izi: (1) Wonjezerani nthawi yowonjezera (kuchepetsa).Choyamba, mvetsetsani ngati amaloledwa kuwonjezera nthawi yowonjezereka kapena yochepetsera molingana ndi zofunikira za kupanga.Ngati iloledwa, imatha kukulitsidwa.(2) Fotokozerani molondola kuthamangitsidwa (kuchepetsa) kudzipangira nokha (kupewa kosungira) ntchito The inverter ili ndi ntchito yodzipangira (yoteteza ku khola) yowonjezereka panthawi yothamanga ndi kuchepetsa.Pamene kukwera (kugwa) panopa kuposa preset chapamwamba malire panopa, kukwera (kugwa) liwiro idzaimitsidwa, ndiyeno kukwera (kugwa) liwiro adzapitirira pamene panopa akutsikira pansi pa mtengo anapereka.
Ulendo wodzaza ndi ma frequency converter Motor imatha kuzungulira, koma kuthamanga kwapano kumaposa mtengo wake, womwe umatchedwa overload.Zomwe zimachitikira pakuchulukirako ndikuti ngakhale zapano zimaposa mtengo wovotera, kukula kwake sikuli kwakukulu, ndipo nthawi zambiri sikupanga mphamvu yayikulu.1, chifukwa chachikulu chochulukitsira (1) Katundu wamakina ndi wolemetsa kwambiri.Chofunikira chachikulu chazochulukira ndikuti injiniyo imatulutsa kutentha, komwe kungapezeke powerenga zomwe zikuchitika pazenera.(2) Kusalinganika kwamagetsi a magawo atatu kumapangitsa kuthamanga kwa gawo linalake kukhala lalikulu kwambiri, zomwe zimatsogolera kukuchulukirachulukira, komwe kumadziwika ndi kutentha kosakwanira kwa mota, komwe sikungapezeke powerenga kuthamanga kwamagetsi kuchokera pachiwonetsero. chophimba (chifukwa chophimba chowonetsera chimangowonetsa gawo limodzi lapano).(3) Kusokonekera, gawo lodziwikiratu lomwe lili mkati mwa inverter limalephera, ndipo chizindikiro chapano chomwe chapezeka ndi chachikulu kwambiri, zomwe zimapangitsa kuti zidutse.2. Njira yoyendera (1) Onani ngati galimotoyo ikutentha.Ngati kutentha kwa injini sikukukwera, choyamba, yang'anani ngati ntchito yamagetsi yamagetsi yamagetsi yosinthira ma frequency imakonzedweratu bwino.Ngati chosinthira pafupipafupi chikadali ndi zochulukirapo, mtengo wokhazikitsidwa kale wachitetezo chamagetsi chamagetsi uyenera kumasuka.Ngati kutentha kwa injini kuli kokwera kwambiri ndipo kuchulukirako kuli kwachilendo, zikutanthauza kuti galimotoyo yadzaza.Panthawiyi, choyamba tiyenera kuwonjezera chiŵerengero chotumizira moyenera kuti tichepetse katundu pa shaft yamoto.Ngati chitha kuchulukitsidwa, onjezerani chiŵerengero chotumizira.Ngati chiŵerengero chopatsirana sichingawonjezeke, mphamvu ya injini iyenera kuwonjezeka.(2) Onani ngati voteji ya magawo atatu pa mbali ya injini ndi yokwanira.Ngati voteji ya magawo atatu kumbali yamagalimoto ndi yosagwirizana, fufuzani ngati voteji ya magawo atatu kumapeto kwa ma frequency converter ndi oyenerera.Ngati ilinso yosagwirizana, vuto limakhala mkati mwa frequency converter.Ngati voteji kumapeto linanena bungwe la pafupipafupi Converter ndi moyenera, vuto lili mu mzere kuchokera pafupipafupi Converter kwa galimoto.Yang'anani ngati zomangira za ma terminals onse zathina.Ngati pali zolumikizira kapena zida zina zamagetsi pakati pa ma frequency converter ndi mota, fufuzani ngati ma terminals a zida zamagetsi zoyenera ali olimba komanso ngati zolumikizana nazo ndizabwino.Ngati voteji ya magawo atatu pa mbali ya galimoto ili yoyenera, muyenera kudziwa kuchuluka kwa ntchito pamene mukugwedeza: Ngati mafupipafupi ogwira ntchito ndi otsika ndipo kuwongolera vekitala (kapena palibe kuwongolera vekitala) kumagwiritsidwa ntchito, chiŵerengero cha U / f chiyenera kuchepetsedwa choyamba.Ngati katunduyo amathabe kuyendetsedwa pambuyo pa kuchepetsedwa, zikutanthauza kuti chiŵerengero choyambirira cha U / f ndichokwera kwambiri ndipo nsonga yamtengo wapatali yamtengo wapatali ndi yaikulu kwambiri, kotero kuti panopa ikhoza kuchepetsedwa mwa kuchepetsa chiwerengero cha U / f.Ngati palibe katundu wokhazikika pambuyo pochepetsa, tiyenera kuganizira kuwonjezera mphamvu ya inverter;Ngati inverter ili ndi ntchito yowongolera vekitala, njira yowongolera vekitala iyenera kutengedwa.
Chodzikanira: Nkhaniyi idapangidwanso kuchokera pa netiweki, ndipo zomwe zili m'nkhaniyi ndikungophunzira komanso kulumikizana.Netiweki ya kompresa salowerera ndale ku malingaliro omwe ali m'nkhaniyi.Ufulu wa nkhaniyo ndi wa wolemba woyambirira komanso nsanja.Ngati pali kuphwanya kulikonse, chonde lemberani kuti muchotse.