Kugwedezeka ndi phokoso la injini yamagetsi yokhazikika
Phunziro pa Mphamvu ya Stator Electromagnetic Force
Phokoso la ma electromagnetic la stator mu mota limakhudzidwa makamaka ndi zinthu ziwiri, mphamvu yamagetsi yamagetsi yamagetsi komanso kuyankha kwamapangidwe ndi ma radiation acoustic omwe amachititsidwa ndi mphamvu yofananira. Ndemanga ya kafukufukuyu.
Pulofesa ZQZhu wa ku yunivesite ya Sheffield, UK, etc. ntchito kusanthula njira kuphunzira mphamvu maginito ndi phokoso la okhazikika maginito galimoto stator, ongoyerekeza kuphunzira mphamvu maginito mphamvu ya okhazikika maginito brushless galimoto, ndi kugwedezeka kwa okhazikika. magnet brushless DC motor yokhala ndi mitengo 10 ndi mipata 9. Phokoso limaphunziridwa, ubale wapakati pa mphamvu yamagetsi yamagetsi ndi kukula kwa dzino la stator umawerengedwa mozama, ndipo ubale pakati pa torque ripple ndi zotsatira zokhathamiritsa za kugwedezeka ndi phokoso zimawunikidwa.Pulofesa Tang Renyuan ndi Song Zhihuan ochokera ku Shenyang University of Technology adapereka njira yowunikira yathunthu yophunzirira mphamvu yamagetsi yamagetsi ndi ma harmonics mu injini yokhazikika ya maginito, yomwe idapereka chithandizo chamalingaliro pakufufuza kopitilira muyeso wa chiphunzitso chaphokoso cha injini yamagetsi yokhazikika.Gwero la phokoso la electromagnetic vibration limawunikidwa mozungulira maginito okhazikika a synchronous motor omwe amayendetsedwa ndi sine wave ndi frequency converter, mawonekedwe amtundu wamagetsi amagetsi, mphamvu yamagetsi yanthawi zonse ndi phokoso lakunjenjemera limawerengedwa, komanso chifukwa cha torque. ripple akuwunikidwa. Ma torque pulsation adayesedwera ndikutsimikiziridwa moyesera pogwiritsa ntchito Element, ndipo ma torque pulsation pansi pamikhalidwe yosiyana ya slot-pole fit, komanso zotsatira za kutalika kwa mpweya, pole arc coefficient, chamfered angle, ndi slot wide pa torque pulsation adawunikidwa. .Ma electromagnetic radial Force ndi tangential force model, ndi kuyerekezera kofananirako kumachitika, mphamvu yamagetsi yamagetsi ndi kuyankha kwa phokoso la vibration zimawunikidwa pama frequency domain ndipo mtundu wama radiation amawunikidwa, ndipo kuyerekezera kofananira ndi kafukufuku woyeserera kumachitika. Zikunenedwa kuti njira zazikulu za maginito okhazikika a motor stator akuwonetsedwa pachithunzichi.
Njira yayikulu yamagetsi okhazikika amagetsi
Ukadaulo wokhathamiritsa ma motor body structureKuthamanga kwakukulu kwa maginito mugalimoto kumalowa mumpata wa mpweya kwambiri, ndikupanga mphamvu zowunikira pa stator ndi rotor, zomwe zimayambitsa kugwedezeka kwamagetsi ndi phokoso.Panthawi imodzimodziyo, imapanga kamphindi kakang'ono ndi mphamvu ya axial, kuchititsa kugwedezeka kwa tangential ndi kugwedezeka kwa axial.Nthawi zambiri, monga ma asymmetric motors kapena ma single-phase motors, kugwedezeka komwe kumapangidwa kumakhala kwakukulu kwambiri, ndipo ndikosavuta kupangitsa kuti ziwiya zolumikizidwa ndi mota ziwonekere, zomwe zimapangitsa kuti phokoso likhale lowala.Kuti muwerengere phokoso lamagetsi, ndikusanthula ndikuwongolera phokosoli, ndikofunikira kudziwa komwe akuchokera, komwe ndi mphamvu yamagetsi yomwe imapanga kugwedezeka ndi phokoso.Pachifukwa ichi, kuwunika kwa mafunde amagetsi amagetsi kumachitika kudzera pakuwunika kwa maginito a mpweya.Kungoganiza kuti maginito kachulukidwe mafunde opangidwa ndi stator ndi, ndi maginito flux kachulukidwe wave.opangidwa ndi rotor ndi, ndiye gulu lawo la maginito kachulukidwe kachulukidwe mafunde mu mpweya kusiyana akhoza kufotokozedwa motere:
Zinthu monga ma stator ndi rotor slotting, kugawa kozungulira, kusokoneza kwa ma waveform panopa, kusinthasintha kwa mpweya-gap permeance, rotor eccentricity, ndi kusalinganika komweko kungayambitse kusinthika kwa makina ndiyeno kugwedezeka. Ma harmonics a mlengalenga, ma harmonics a nthawi, ma harmonics a slot, ma eccentricity harmonics ndi maginito a maginito a mphamvu ya magnetomotive onse amapanga ma harmonics apamwamba a mphamvu ndi torque. Makamaka ma radial force wave mu mota ya AC, imagwira ntchito pa stator ndi rotor ya mota nthawi yomweyo ndikupanga kupotoza kwa maginito.Mawonekedwe a stator-frame ndi rotor-casing ndiye gwero lalikulu la radiation yamagalimoto.Ngati mphamvu ya radial ili pafupi kapena yofanana ndi ma frequency achilengedwe a stator-base system, resonance idzachitika, zomwe zingayambitse kupindika kwa motor stator system ndikupanga kugwedezeka ndi phokoso lamayimbidwe.Nthawi zambiri,Phokoso la magnetostrictive lomwe limabwera chifukwa cha kutsika kwa 2f, mphamvu yama radial yapamwamba kwambiri ndiyosavomerezeka (f ndiye kuchuluka kwa injini, p ndi kuchuluka kwa mawiri awiri amoto). Komabe, mphamvu ya radial yopangidwa ndi magnetostriction imatha kufika pafupifupi 50% ya mphamvu yozungulira yomwe imapangitsidwa ndi mphamvu yamagetsi yamagetsi.Kwa injini yoyendetsedwa ndi inverter, chifukwa cha kukhalapo kwa ma harmonics anthawi yayitali pamayendedwe ake a stator, ma harmonics amapangira ma torque owonjezera, omwe nthawi zambiri amakhala okulirapo kuposa ma torque othamanga omwe amapangidwa ndi ma harmonics amlengalenga. chachikulu.Kuphatikiza apo, ma voltage ripple opangidwa ndi rectifier unit amaperekedwanso ku inverter kudzera mudera lapakati, zomwe zimapangitsa mtundu wina wa pulsating torque.Pankhani ya phokoso lamagetsi lamagetsi okhazikika a maginito synchronous motor, mphamvu ya Maxwell ndi mphamvu yamagetsi ndizomwe zimayambitsa kugwedezeka kwagalimoto ndi phokoso.
Makhalidwe a motor stator vibrationPhokoso lamagetsi lamagetsi la mota silimangogwirizana ndi kuchuluka kwa ma frequency, dongosolo ndi matalikidwe a mphamvu yamagetsi yamagetsi yopangidwa ndi mpweya wamagetsi, komanso yokhudzana ndi momwe chilengedwe chimapangidwira.Phokoso la electromagnetic limapangidwa makamaka ndi kugwedezeka kwa motor stator ndi casing.Chifukwa chake, kulosera ma frequency achilengedwe a stator kudzera m'njira zongoyerekeza kapena zofananira pasadakhale, ndikudodometsa ma frequency a electromagnetic mphamvu ndi ma frequency achilengedwe a stator, ndi njira yabwino yochepetsera phokoso lamagetsi.Pamene mafupipafupi a mphamvu yamagetsi yamagetsi amafanana kapena pafupi ndi maulendo achilengedwe a dongosolo linalake la stator, resonance idzayamba.Panthawiyi, ngakhale matalikidwe a mafunde amphamvu a radial si aakulu, amachititsa kugwedezeka kwakukulu kwa stator, potero kumapanga phokoso lalikulu lamagetsi.Kwa phokoso lagalimoto, chinthu chofunikira kwambiri ndikuwerenga mitundu yachilengedwe yokhala ndi kugwedezeka kwa ma radial monga chachikulu, dongosolo la axial ndi zero, ndipo mawonekedwe amtundu wa malo ali pansi pa dongosolo lachisanu ndi chimodzi, monga momwe tawonetsera pachithunzichi.
Fomu ya Stator vibration
Mukasanthula mawonekedwe a kugwedezeka kwa mota, chifukwa cha kuchepa kwa mawonekedwe amtundu komanso kuchuluka kwa mota stator, zitha kunyalanyazidwa.Kuchepetsa kwachipangidwe ndiko kuchepetsa kugwedezeka kwafupipafupi pafupi ndi nthawi ya resonant pogwiritsa ntchito njira yochepetsera mphamvu, monga momwe zasonyezedwera, ndipo zimangoganiziridwa pokhapokha kapena pafupi ndi ma frequency a resonant.
damping zotsatira
Pambuyo powonjezera ma windings ku stator, pamwamba pa ma windings muzitsulo zachitsulo zimayikidwa ndi varnish, mapepala otetezera, varnish ndi waya wamkuwa amamangiriridwa wina ndi mzake, ndipo pepala lotetezera muzitsulo limamangiriridwa kwambiri ndi mano. wa chuma core.Chifukwa chake, mapindikidwe olowera m'malo amakhala ndi kuuma kwina kwapakati pachitsulo ndipo sangathe kuwonedwa ngati misa yowonjezera.Njira yotsirizira ikagwiritsidwa ntchito powunikira, ndikofunikira kupeza magawo omwe amawonetsa zinthu zosiyanasiyana zamakina malinga ndi zomwe ma windings ali mu cogging.Pakukhazikitsa ndondomekoyi, yesetsani kuwonetsetsa kuti utoto woviika ukhale wabwino, onjezerani kugwedezeka kwa mafunde a koyilo, kuwongolera kulimba kwa mafunde ndi pachimake chachitsulo, onjezerani kulimba kwa mawonekedwe agalimoto, onjezerani ma frequency achilengedwe kuti mupewe. resonance, kuchepetsa kugwedezeka matalikidwe, ndi kuchepetsa mafunde electromagnetic. phokoso.Mafupipafupi achilengedwe a stator atapanikizidwa mu casing ndi zosiyana ndi zapakati pa stator imodzi. Chophimbacho chikhoza kusintha kwambiri maulendo olimba a mawonekedwe a stator, makamaka maulendo otsika olimba. Kuwonjezeka kwa malo ogwiritsira ntchito liwiro lozungulira kumawonjezera vuto la kupewa resonance pamapangidwe amoto.Popanga galimotoyo, zovuta za chipolopolocho ziyenera kuchepetsedwa, ndipo mafupipafupi achilengedwe a kamangidwe ka galimotoyo akhoza kuonjezedwa mwa kuonjezera makulidwe a chipolopolocho kuti apewe kuchitika kwa resonance.Kuphatikiza apo, ndikofunikira kukhazikitsa mgwirizano wolumikizana pakati pa stator core ndi casing mukamagwiritsa ntchito kuyerekezera kwazinthu zomaliza.
Electromagnetic Analysis of MotorsMonga chizindikiro chofunikira pamapangidwe amagetsi a mota, kachulukidwe ka maginito nthawi zambiri amatha kuwonetsa momwe galimotoyo imagwirira ntchito.Choncho, choyamba timachotsa ndikuyang'ana kuchuluka kwa maginito, choyamba ndikutsimikizira kulondola kwa kayeseleledwe, ndipo chachiwiri ndikupereka maziko otsatiridwa ndi mphamvu yamagetsi yamagetsi.Chithunzi chojambulidwa chamtambo cha maginito champhamvu chikuwonetsedwa pachithunzi chotsatirachi.
Zitha kuwoneka kuchokera pa mapu amtambo kuti mphamvu ya maginito pamalo a mlatho wodzipatula wa maginito ndi apamwamba kwambiri kuposa malo olowera a BH curve ya stator ndi rotor core, yomwe imatha kusewera bwino maginito kudzipatula.
Air gap flux density curveChotsani kachulukidwe ka maginito a mpweya wagalimoto ndi malo a dzino, jambulani popindika, ndipo mutha kuwona zikhulupiriro zamphamvu yamagetsi yamagetsi ndi kachulukidwe ka mano. Kuchuluka kwa maginito a dzino ndi mtunda wina kuchokera kumalo opangira zinthu, zomwe zimaganiziridwa kuti zimayamba chifukwa cha kutayika kwakukulu kwachitsulo pamene galimotoyo imapangidwa mothamanga kwambiri.
Kusanthula kwa Magalimoto a ModalKutengera mtundu wamagalimoto ndi gululi, tanthauzirani zinthuzo, tanthauzirani pachimake cha stator ngati chitsulo chomangika, ndikutanthauzira kuti casingyo ndi aluminiyamu, ndikusanthula modali pagalimoto yonse.Njira yonse yagalimoto imapezedwa monga momwe tawonetsera pachithunzichi.
mawonekedwe amtundu woyamba
mawonekedwe amtundu wachiwiri
mawonekedwe amtundu wachitatu
Kusanthula kwamphamvu yamagetsiMayankho amtundu wa mota amawunikidwa, ndipo zotsatira za kuthamanga kwa vibration pama liwiro osiyanasiyana zikuwonetsedwa pachithunzi pansipa.
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