Galimotoyo imasweka mwachangu, ndipo inverter ikuchita ngati chiwanda?Werengani chinsinsi pakati pa injini ndi inverter m'nkhani imodzi!
Anthu ambiri apeza chodabwitsa cha inverter kuwonongeka kwa injini.Mwachitsanzo, mu fakitale yopopa madzi, m'zaka ziwiri zapitazi, ogwiritsa ntchito nthawi zambiri amanena kuti mpope wamadzi unawonongeka panthawi ya chitsimikizo.M’mbuyomu, ubwino wa zinthu za fakitale ya mpope unali wodalirika kwambiri.Pambuyo pofufuza, zidapezeka kuti mapampu amadzi owonongekawa onse amayendetsedwa ndi otembenuza pafupipafupi.
Kutuluka kwa ma frequency converter kwabweretsa zatsopano pakuwongolera makina opangira mafakitale komanso kupulumutsa mphamvu zamagalimoto.Kupanga kwa mafakitale sikungasiyanitsidwe ndi otembenuza pafupipafupi.Ngakhale m'moyo watsiku ndi tsiku, ma elevator ndi ma inverter air conditioners akhala ofunika kwambiri.Otembenuza pafupipafupi ayamba kulowa m'mbali zonse zakupanga ndi moyo.Komabe, kutembenuza pafupipafupi kumabweretsanso zovuta zambiri zomwe sizinachitikepo, zomwe kuwonongeka kwa injini ndi chimodzi mwazinthu zomwe zimachitika kwambiri.
Anthu ambiri apeza chodabwitsa cha inverter kuwonongeka kwa injini.Mwachitsanzo, mu fakitale yopopa madzi, m'zaka ziwiri zapitazi, ogwiritsa ntchito nthawi zambiri amanena kuti mpope wamadzi unawonongeka panthawi ya chitsimikizo.M’mbuyomu, ubwino wa zinthu za fakitale ya mpope unali wodalirika kwambiri.Pambuyo pofufuza, zidapezeka kuti mapampu amadzi owonongekawa onse amayendetsedwa ndi otembenuza pafupipafupi.
Ngakhale chodabwitsa chakuti chosinthira pafupipafupi chimawononga mota chakopa chidwi kwambiri, anthu sakudziwabe momwe zimachitikira izi, osasiyanso momwe angapewere.Cholinga cha nkhaniyi ndikuthetsa chisokonezo ichi.
Kuwonongeka kwa inverter kwa injini
Kuwonongeka kwa inverter ku injini kumaphatikizapo mbali ziwiri, kuwonongeka kwa mafunde a stator ndi kuwonongeka kwa chotengera, monga momwe tawonetsera pa Chithunzi 1. Kuwonongeka kotereku kumachitika mkati mwa masabata angapo mpaka miyezi khumi, ndipo nthawi yeniyeni imadalira. pa mtundu wa inverter, mtundu wa mota, mphamvu ya mota, kuchuluka kwa chonyamulira cha inverter, kutalika kwa chingwe pakati pa inverter ndi mota, komanso kutentha kozungulira.Zinthu zambiri zimagwirizana.Kuwonongeka koyambirira kwa injini kumabweretsa kuwonongeka kwakukulu kwachuma pakupanga bizinesi.Kutayika kotereku sikungotengera mtengo wokonza ndikusinthanso magalimoto, koma koposa zonse, kuwonongeka kwachuma komwe kumachitika chifukwa chakuyimitsidwa kosayembekezereka.Chifukwa chake, mukamagwiritsa ntchito chosinthira pafupipafupi kuti muyendetse mota, chidwi chokwanira chiyenera kuperekedwa ku vuto la kuwonongeka kwagalimoto.
Kuwonongeka kwa inverter kwa injini
Kusiyana pakati pa inverter drive ndi mafakitale frequency drive
Kuti mumvetsetse chifukwa chomwe ma frequency motors amatha kuwonongeka ngati inverter drive, choyamba mumvetsetse kusiyana pakati pa voteji ya inverter driven motor ndi mphamvu yamagetsi yamagetsi.Kenako phunzirani momwe kusiyana uku kungakhudzire injini.
Mapangidwe oyambira osinthira pafupipafupi akuwonetsedwa mu Chithunzi 2, kuphatikiza magawo awiri, rectifier circuit ndi inverter circuit.Dera lowongoleranso ndi gawo lotulutsa magetsi la DC lomwe limapangidwa ndi ma diode wamba ndi ma capacitor osefera, ndipo inverter yozungulira imatembenuza magetsi a DC kukhala ma pulse wide modulated voltage waveform (PWM voltage).Chifukwa chake, mawonekedwe amagetsi amagetsi oyendetsedwa ndi inverter ndi mawonekedwe a pulse okhala ndi m'lifupi mwake, m'malo mwa sine wave voltage waveform.Kuyendetsa mota ndi pulse voltage ndiye gwero la kuwonongeka kwa injiniyo mosavuta.
Njira ya Inverter Damage Motor Stator Winding
Pamene mphamvu yamagetsi imaperekedwa pa chingwe, ngati kusokonezeka kwa chingwe sikukugwirizana ndi kusokoneza kwa katundu, kulingalira kudzachitika kumapeto kwa katundu.Chotsatira cha kusinkhasinkha ndikuti mafunde a zochitika ndi mafunde owonetseredwa amapangidwa pamwamba kuti apange magetsi apamwamba.Kukula kwake kumatha kufika kuwirikiza kawiri ma voliyumu amabasi a DC kwambiri, omwe amakhala pafupifupi katatu kuchuluka kwa voliyumu ya inverter, monga momwe tawonetsera pa Chithunzi 3. Mpweya wopitilira muyeso umawonjezeredwa ku koyilo ya motor stator, kuchititsa kugwedezeka kwamagetsi kwa koyilo. , ndipo kugwedezeka kwamagetsi pafupipafupi kumapangitsa injiniyo kulephera msanga.
Galimoto yoyendetsedwa ndi ma frequency converter ikakhudzidwa ndi kuchuluka kwamagetsi, moyo wake weniweni umakhudzana ndi zinthu zambiri, kuphatikiza kutentha, kuipitsidwa, kugwedezeka, magetsi, ma frequency onyamula, komanso njira yotsekera ma coil.
Kukwera kwa ma frequency onyamulira a inverter, kuyandikira kwa ma waveform apano ndikuyandikira kwa sine wave, komwe kumachepetsa kutentha kwa injini ndikutalikitsa moyo wa inverter.Komabe, ma frequency onyamula okwera amatanthawuza kuti kuchuluka kwa ma spike voltages opangidwa pa sekondi imodzi ndikokulirapo, ndipo kuchuluka kwazomwe zimagwedezeka pamagalimoto ndikwambiri.Chithunzi 4 chikuwonetsa moyo wotsekemera ngati ntchito ya kutalika kwa chingwe ndi ma frequency onyamula.Zitha kuwoneka kuchokera pazithunzi kuti chingwe cha 200-foot, pamene mafupipafupi onyamulira akuwonjezeka kuchokera ku 3kHz mpaka 12kHz (kusintha kwa 4 nthawi), moyo wa kusungunula umachepa kuchokera pa maola 80,000 mpaka maola 20,000 (kusiyana kwa 4 nthawi).
Mphamvu ya Carrier Frequency pa Insulation
Kutentha kwapamwamba kwa injini, kufupikitsa moyo wa kusungunula, monga momwe tawonetsera pa Chithunzi 5, pamene kutentha kumakwera kufika 75 ° C, moyo wa galimotoyo ndi 50% yokha.Kwa mota yoyendetsedwa ndi inverter, popeza voteji ya PWM imakhala ndi zigawo zochulukirapo, kutentha kwagalimoto kumakhala kokwera kwambiri kuposa komwe kumayendera ma frequency voltage drive.
Njira ya Inverter Damage Motor Bearing
Chifukwa chomwe ma frequency converter amawonongera kunyamula kwa mota ndikuti pali pakali pano ikuyenda pamayendedwe, ndipo pakali pano pali kulumikizana kwapakatikati.Dongosolo lolumikizana lapakati lipanga arc, ndipo arc imawotcha.
Pali zifukwa ziwiri zazikulu zomwe zikuyenda mumayendedwe agalimoto ya AC.Choyamba, mphamvu yamagetsi yomwe imapangidwa chifukwa cha kusalinganika kwa mphamvu yamagetsi yamagetsi yamkati, ndipo chachiwiri, njira yapano yapanthawiyi yobwera chifukwa cha kusokera kwamagetsi.
Mphamvu ya maginito mkati mwa injini yabwino ya AC induction motor ndi yofanana.Pamene mafunde a ma windings a magawo atatu ali ofanana ndipo magawo amasiyana ndi 120 °, palibe magetsi omwe adzapangitsidwa pa shaft ya galimoto.Pamene kutulutsa kwamagetsi kwa PWM ndi inverter kumapangitsa kuti maginito mkati mwa mota akhale asymmetrical, voteji imapangitsidwa pa shaft.Mtundu wamagetsi ndi 10 ~ 30V, womwe umagwirizana ndi magetsi oyendetsa.Kukwera kwamagetsi oyendetsa galimoto, kumapangitsanso mphamvu yamagetsi pa shaft.apamwamba.Pamene mtengo wa voteji uwu umaposa mphamvu ya dielectric ya mafuta odzola muzitsulo, njira yamakono imapangidwa.Panthawi ina pozungulira shaft, kutsekemera kwa mafuta opaka mafuta kumayimitsanso mphamvuyi.Njirayi ikufanana ndi njira yozimitsa yosinthira makina.Pochita izi, arc idzapangidwa, yomwe idzawombera pamwamba pa shaft, mpira, ndi shaft mbale, kupanga maenje.Ngati palibe kugwedezeka kwakunja, ma dimples ang'onoang'ono sadzakhala ndi mphamvu zambiri, koma ngati pali kugwedezeka kwakunja, ma grooves amapangidwa, omwe amakhudza kwambiri ntchito ya galimoto.
Kuphatikiza apo, zoyeserera zawonetsa kuti voteji pa shaft imagwirizananso ndi kuchuluka kwamphamvu kwamagetsi otulutsa a inverter.Kutsika kwapang'onopang'ono kofunikira, kumapangitsanso mphamvu yamagetsi pa shaft komanso kuwonongeka kwakukulu.
Kumayambiriro kwa ntchito yamoto, pamene kutentha kwa mafuta odzola kumakhala kochepa, mtundu wamakono ndi 5-200mA, kachitidwe kakang'ono kotereku sikungawononge kubereka.Komabe, injini ikathamanga kwa nthawi, pamene kutentha kwa mafuta odzola kumawonjezeka, chiwombankhanga chamakono chidzafika 5-10A, zomwe zingayambitse flashover ndikupanga maenje ang'onoang'ono pamwamba pa zigawozo.
Chitetezo cha ma motor stator windings
Kutalika kwa chingwe kupitilira mamita 30, zosinthira ma frequency amakono mosapeweka zimatulutsa ma spikes amagetsi kumapeto kwa mota, kufupikitsa moyo wagalimoto.Pali malingaliro awiri oletsa kuwonongeka kwa injini.Imodzi ndikugwiritsa ntchito mota yokhala ndi zotchingira zopindika kwambiri komanso mphamvu ya dielectric (yomwe nthawi zambiri imatchedwa variable frequency motor), ndipo ina ndikuchitapo kanthu kuti muchepetse mphamvu yamagetsi.Muyeso wakale ndi woyenera kuma projekiti omwe angomangidwa kumene, ndipo muyeso womaliza ndi woyenera kusintha ma mota omwe alipo.
Masiku ano, njira zodzitetezera zamagalimoto zomwe zimagwiritsidwa ntchito kwambiri ndi izi:
1) Ikani riyakitala kumapeto kwa ma frequency converter: Muyezo uwu ndi womwe umagwiritsidwa ntchito kwambiri, koma ziyenera kudziwidwa kuti njirayi imakhala ndi zotsatirapo pa zingwe zazifupi (pansi pa 30 metres), koma nthawi zina zotsatira zake sizoyenera. , monga momwe chithunzi 6 (c ) chikusonyezedwa.
2) Ikani fyuluta ya dv/dt kumapeto kwa ma frequency converter: Muyeso uwu ndi woyenera nthawi zomwe kutalika kwa chingwe kumakhala kosakwana 300 metres, ndipo mtengo wake ndi wokwera pang'ono kuposa wa reactor, koma zotsatira zake zakhala. bwino kwambiri, monga momwe tawonetsera pa Chithunzi 6 (d) .
3) Ikani fyuluta ya sine wave pakutulutsa kwa ma frequency converter: muyeso uwu ndiye wabwino kwambiri.Chifukwa apa, PWM pulse voltage imasinthidwa kukhala sine wave voltage, galimotoyo imagwira ntchito mofanana ndi mphamvu yamagetsi yamagetsi, ndipo vuto la nsonga yamagetsi yathetsedwa kwathunthu (mosasamala kanthu kuti chingwecho chili chotalika bwanji, padzakhala palibe magetsi apamwamba).
4) Ikani chotsitsa chamagetsi pachimake pakati pa chingwe ndi mota: kuipa kwa miyeso yam'mbuyomu ndikuti mphamvu yagalimoto ikakhala yayikulu, chowongolera kapena fyuluta imakhala ndi voliyumu yayikulu ndi kulemera kwake, ndipo mtengo wake ndi wofanana. apamwamba.Kuphatikiza apo, riyakitala Zonse zosefera ndi zosefera zipangitsa kutsika kwamagetsi kwina, komwe kungakhudze ma torque agalimoto.Kugwiritsa ntchito inverter peak voltage absorber kumatha kuthana ndi zofooka izi.SVA spike voltage absorber yopangidwa ndi 706 ya Second Academy of Aerospace Science and Industry Corporation imagwiritsa ntchito ukadaulo wapamwamba wamagetsi amagetsi ndi ukadaulo wowongolera mwanzeru, ndipo ndi chida choyenera kuthetsa kuwonongeka kwa magalimoto.Kuphatikiza apo, SVA spike absorber imateteza mayendedwe a mota.
Spike voltage absorber ndi mtundu watsopano wa chipangizo choteteza magalimoto.Lumikizani malo olowera mphamvu zamagalimoto molumikizana.
1) Dongosolo lodziwikiratu nsonga yamagetsi limazindikira matalikidwe amagetsi pamagetsi amagetsi munthawi yeniyeni;
2) Pamene kukula kwa voteji wapezeka kupyola malire oikika, lamulirani nsonga yotchinga mphamvu dera kuti kuyamwa mphamvu ya nsonga voteji;
3) Mphamvu ya nsonga yamagetsi ikadzadza ndi nsonga yamphamvu kwambiri, valavu yowongolera mphamvu yamphamvu imatsegulidwa, kotero kuti mphamvu yayikulu mu buffer imatulutsidwa muchotengera champhamvu, ndipo mphamvu yamagetsi imasinthidwa kukhala kutentha. mphamvu;
4) Wowunikira kutentha amayang'anira kutentha kwa nsonga yamphamvu yamphamvu.Kutentha kukakhala kokwera kwambiri, valavu yowongolera mphamvu yamphamvu imatsekedwa bwino kuti ichepetse kuyamwa kwamphamvu (pansi pamalingaliro owonetsetsa kuti galimotoyo imatetezedwa), kuti muteteze nsonga yamagetsi kuti isatenthe kwambiri ndikuwononga.kuwonongeka;
5) Ntchito yonyamula mayamwidwe apano ndikuyamwa mphamvu ndikuteteza mphamvu yamagalimoto.
Poyerekeza ndi fyuluta yomwe tatchulayi ya du/dt, fyuluta ya sine wave ndi njira zina zotetezera ma mota, choyikira pachimake chimakhala ndi zabwino zazikulu zazing'ono, mtengo wotsika, komanso kukhazikitsa kosavuta (kuyika kofananira).Makamaka pa nkhani ya mphamvu yapamwamba, ubwino wa nsonga zamtengo wapatali pamtengo, voliyumu, ndi kulemera kwake ndizodziwika kwambiri.Kuonjezera apo, popeza imayikidwa mofanana, sipadzakhala kutsika kwa magetsi, ndipo padzakhala kutsika kwa magetsi pa du / dt fyuluta ndi sine wave fyuluta, ndi kutsika kwa magetsi kwa sine wave fyuluta pafupi ndi 10. %, zomwe zipangitsa kuti torque ya injini ichepetse.
Chodzikanira: Nkhaniyi idapangidwanso kuchokera pa intaneti.Zomwe zili m'nkhaniyi ndi zophunzirira komanso kulumikizana kokha.Air Compressor Network salowerera ndale pamalingaliro omwe ali m'nkhaniyi.Ufulu wa nkhaniyo ndi wa wolemba woyambirira komanso nsanja.Ngati pali kuphwanya kulikonse, chonde lemberani kuti mufufute