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Saboda tsadar aiki da tsawon rayuwar injin, ingantaccen dabarun sarrafa zafin injin yana da matukar mahimmanci.Wannan labarin ya ƙirƙiri dabarun sarrafa zafi don induction Motors don samar da ingantacciyar karko da haɓaka inganci.Bugu da ƙari, an yi nazari mai zurfi na wallafe-wallafen kan hanyoyin kwantar da injin.A matsayin babban sakamako, ana ba da lissafin thermal na injin asynchronous mai sanyaya mai ƙarfi mai ƙarfi, la'akari da sanannen matsalar rarraba zafi.Bugu da kari, wannan binciken yana ba da shawarar haɗaɗɗiyar hanya tare da dabarun sanyaya biyu ko fiye don saduwa da buƙatun yanzu.Nazarin lambobi na samfurin injin asynchronous mai sanyaya iska mai nauyin 100 kW da ingantaccen tsarin kula da thermal na injin guda ɗaya, inda aka sami babban haɓakar ingancin injin ta hanyar haɗaɗɗen sanyaya iska da tsarin sanyaya ruwa mai hade. za'ayi.An yi nazarin tsarin sanyayawar iska da mai sanyaya ruwa ta amfani da SolidWorks 2017 da ANSYS Fluent 2021 iri.Ruwan ruwa daban-daban guda uku (5 L/min, 10 L/min, da 15 L/min) an yi nazari akan induction injin sanyaya iska na al'ada kuma an tabbatar da su ta amfani da albarkatun da aka buga.Binciken ya nuna cewa don nau'ikan kwarara daban-daban (5 L / min, 10 L / min da 15 L / min bi da bi) mun sami raguwar zafin jiki daidai da 2.94%, 4.79% da 7.69%.Don haka, sakamakon ya nuna cewa injin shigar da na'urar na iya rage yawan zafin jiki yadda ya kamata idan aka kwatanta da injin shigar da iska mai sanyaya.
Motar lantarki ɗaya ce daga cikin mahimman abubuwan ƙirƙira na kimiyyar injiniyan zamani.Ana amfani da injinan lantarki a cikin komai daga kayan gida zuwa abubuwan hawa, gami da masana'antar kera motoci da sararin samaniya.A cikin 'yan shekarun nan, shahararren induction Motors (AM) ya karu saboda yawan karfin farawa, kyakkyawar kulawar sauri da matsakaicin nauyin nauyi (Fig. 1).Induction Motors ba wai kawai ke sa fitulun hasken ku su haskaka ba, suna sarrafa yawancin na'urori a cikin gidan ku, daga buroshin hakori zuwa Tesla na ku.Ƙarfin injina a cikin IM ana ƙirƙira shi ta hanyar tuntuɓar filin maganadisu na stator da windings na rotor.Bugu da kari, IM wani zaɓi ne mai yuwuwa saboda ƙarancin wadataccen ƙarfe na ƙasa.Koyaya, babban hasara na AD shine cewa rayuwarsu da ingancin su suna da matukar damuwa ga zafin jiki.Induction Motors suna cinye kusan kashi 40% na wutar lantarki a duniya, wanda ya kamata mu yi tunanin cewa sarrafa amfani da wutar lantarki na waɗannan inji yana da mahimmanci.
Ƙididdigar Arrhenius ta bayyana cewa kowane 10 ° C ya tashi a yanayin zafin aiki, rayuwar injin gabaɗaya ya ragu.Sabili da haka, don tabbatar da aminci da ƙara yawan kayan aiki na na'ura, ya zama dole a kula da kula da zafin jiki na hawan jini.A baya, an yi watsi da nazarin thermal kuma masu zanen motoci sun yi la'akari da matsalar kawai a gefe, bisa ga ƙwarewar ƙira ko wasu sauye-sauye masu girma irin su girma na yau da kullum, da dai sauransu Wadannan hanyoyin suna haifar da aikace-aikacen manyan iyakokin aminci don mafi muni. yanayin yanayin zafi, yana haifar da karuwa a girman inji kuma saboda haka karuwar farashi.
Akwai nau'ikan bincike na thermal iri biyu: binciken da'irar dunƙule da hanyoyin lambobi.Babban fa'idar hanyoyin nazari shine ikon yin lissafin da sauri da daidai.Koyaya, dole ne a yi ƙoƙari sosai don ayyana da'irori tare da isassun daidaito don kwaikwayi hanyoyin zafi.A gefe guda kuma, hanyoyin ƙididdiga sun kasu kusan zuwa ƙididdige ƙimar ruwa mai ƙima (CFD) da kuma structural thermal analysis (STA), dukansu suna amfani da bincike mai iyaka (FEA).Amfanin bincike na lambobi shine cewa yana ba ku damar yin ƙira ga lissafin na'urar.Koyaya, saitin tsarin da lissafi na iya zama da wahala wasu lokuta.Labarin kimiyya da aka tattauna a ƙasa an zaɓen misalan bincike na thermal da electromagnetic na induction iri-iri na zamani.Waɗannan labaran sun sa marubutan suyi nazarin yanayin zafi a cikin injinan da ba a daidaita su ba da hanyoyin sanyaya su.
Pil-Wan Han1 ya tsunduma cikin bincike na thermal da electromagnetic na MI.Ana amfani da hanyar binciken da'ira mai dunƙulewa don nazarin yanayin zafi, kuma ana amfani da hanyar ƙwaƙƙwalwar lokaci mai iyaka don nazarin lantarki.Domin samar da kariya mai yawa na thermal a cikin kowane aikace-aikacen masana'antu, dole ne a ƙididdige yawan zafin jiki na iska mai ƙarfi.Ahmed et al.2 ya ba da shawarar samfurin cibiyar sadarwar zafi mafi girma bisa la'akari mai zurfi na thermal da thermodynamic.Haɓaka hanyoyin ƙirar thermal don dalilai na kariyar zafin masana'antu suna fa'ida daga hanyoyin nazari da kuma la'akari da sigogin thermal.
Nair et al.3 sun yi amfani da ƙididdigar haɗin gwiwa na 39 kW IM da 3D ƙididdiga na thermal analysis don tsinkaya rarrabawar thermal a cikin injin lantarki.Ying et al.4 sun yi nazarin fan-sanyi cikakken rufewa (TEFC) IMs tare da ƙimar zafin jiki na 3D.Moon et al.5 yayi nazarin kaddarorin zafin zafi na IM TEFC ta amfani da CFD.An ba da samfurin canjin motar LPTN ta Todd et al.6.Ana amfani da bayanan zazzabi na gwaji tare da ƙididdige yanayin zafi da aka samo daga ƙirar LPTN da aka tsara.Peter et al.7 sunyi amfani da CFD don nazarin yanayin iska wanda ke shafar yanayin zafi na injin lantarki.
Cabral et al8 ya ba da shawarar samfurin zafi mai sauƙi na IM wanda a cikinsa aka sami zafin injin ɗin ta amfani da ma'aunin zafi na Silinda.Nategh et al.9 sun yi nazarin tsarin motsa jiki na motsa jiki ta hanyar amfani da CFD don gwada daidaiton abubuwan da aka inganta.Don haka, ana iya amfani da nazarin ƙididdiga da na gwaji don kwaikwayi nazarin zafin jiki na induction motors, duba fig.2.
Yinye et al.10 sun ba da shawarar ƙira don haɓaka gudanarwar thermal ta hanyar amfani da kaddarorin thermal na yau da kullun na daidaitattun kayan da tushen gama gari na asarar ɓangaren injin.Marco et al.11 ya gabatar da ma'auni don tsara tsarin sanyaya da jaket na ruwa don kayan aikin injin ta amfani da nau'ikan CFD da LPTN.Yaohui et al.12 yana ba da jagororin daban-daban don zaɓar hanyar sanyaya mai dacewa da kimanta aiki a farkon tsarin ƙira.Nell et al.13 sun ba da shawarar yin amfani da ƙira don siminti na lantarki-mafi-zafi mai haɗe-haɗe don ƙayyadaddun ƙimar ƙima, matakin daki-daki da ikon lissafi don matsalar multiphysics.Jean et al.14 da Kim et al.15 sunyi nazarin rarraba zafin jiki na injin induction mai sanyaya iska ta amfani da filin FEM na 3D.Yi ƙididdige bayanan shigarwa ta amfani da 3D eddy nazarin filin halin yanzu don nemo asarar Joule da amfani da su don nazarin zafi.
Michel et al.16 idan aka kwatanta na al'ada centrifugal magoya bayan sanyaya tare da axial magoya na daban-daban kayayyaki ta hanyar simulations da gwaje-gwaje.Ɗaya daga cikin waɗannan ƙira ya sami ƙanƙanta amma gagarumin ingantattun ingantattun injunan injuna yayin kiyaye yanayin zafin aiki iri ɗaya.
Lu et al.17 sun yi amfani da hanyar da'irar maganadisu daidai gwargwado a hade tare da samfurin Boglietti don kimanta asarar baƙin ƙarfe akan mashin induction.Marubutan sun ɗauka cewa rarraba juzu'in maganadisu a kowane ɓangaren giciye a cikin injin ɗin ya zama iri ɗaya.Sun kwatanta hanyarsu tare da sakamakon bincike mai iyaka da samfuran gwaji.Ana iya amfani da wannan hanyar don tantance bayanan MI, amma daidaitonta yana da iyaka.
18 yana gabatar da hanyoyi daban-daban don nazarin filin lantarki na injin induction na layi.Daga cikin su, an bayyana hanyoyin da ake ƙididdige hasarar wutar lantarki a cikin layin dogo masu amsawa da kuma hanyoyin tsinkayar hauhawar zafin jiki na induction induction.Ana iya amfani da waɗannan hanyoyin don haɓaka haɓakar canjin makamashi na induction induction na layi.
Zabdur et al.19 sun binciki aikin jakunkunan sanyaya ta amfani da hanyar lambobi masu girma uku.Jaket ɗin sanyaya yana amfani da ruwa a matsayin babban tushen sanyaya don IM mai hawa uku, wanda ke da mahimmanci ga iko da matsakaicin yanayin zafi da ake buƙata don yin famfo.Rippel et al.20 sun ƙirƙira sabon tsarin kula da tsarin sanyaya ruwa mai suna transverse laminated sanyaya, wanda refrigerant ke gudana ta hanyar kunkuntar yankuna da aka kafa ta ramuka a tsakanin juna.Deriszade et al.21 ta gwaji ta bincikar sanyaya na'urorin motsa jiki a cikin masana'antar kera motoci ta amfani da cakuda ethylene glycol da ruwa.Yi kimanta aikin gaurayawan gaurayawan daban-daban tare da CFD da 3D nazarin ruwa mai ruɗani.Wani binciken kwaikwayo na Boopathi et al.22 ya nuna cewa yawan zafin jiki na injuna masu sanyaya ruwa (17-124 ° C) ya fi ƙanƙanta fiye da na injin sanyaya iska (104-250 ° C).Matsakaicin zafin jiki na injin da aka sanyaya ruwa aluminium yana raguwa da 50.4%, kuma matsakaicin zafin jiki na PA6GF30 mai sanyaya ruwa ya ragu da 48.4%.Bezukov et al.23 sun kimanta tasirin sikelin sikelin akan yanayin zafi na bangon injin tare da tsarin sanyaya ruwa.Nazarin ya nuna cewa fim din oxide mai kauri na 1.5 mm yana rage zafi da kashi 30%, yana kara yawan man fetur kuma yana rage karfin injin.
Tanguy et al.24 sun gudanar da gwaje-gwaje tare da nau'o'in kwarara daban-daban, yanayin mai, saurin juyawa da yanayin allura don injin lantarki ta amfani da mai mai mai sanyaya.An kafa dangantaka mai ƙarfi tsakanin ƙimar kwarara da ingantaccen sanyaya gabaɗaya.Ha et al.25 sun ba da shawarar yin amfani da nozzles drip a matsayin nozzles don rarraba fim ɗin mai a ko'ina da haɓaka ingancin sanyaya injin.
Nandi et al.26 sun yi nazarin tasirin bututun zafi mai siffa L akan aikin injin da kula da thermal.Ana shigar da ɓangaren bututu mai zafi a cikin kwandon motar ko kuma an binne shi a cikin mashin ɗin, kuma ana shigar da ɓangaren na'urar da sanyaya ta hanyar ruwa ko iska.Bellettre et al.27 yayi nazarin tsarin kwantar da ruwa mai ƙarfi na PCM don madaidaicin motar motsa jiki.PCM tana zubar da kawunan masu jujjuyawa, yana rage zafin zafi ta wurin adana makamashin zafi na latent.
Don haka, ana kimanta aikin motar da zafin jiki ta amfani da dabarun sanyaya daban-daban, duba fig.3. Wadannan da'irori masu sanyaya an tsara su don sarrafa zafin jiki na windings, faranti, kawuna, maganadisu, gawa da faranti na ƙarshe.
An san tsarin sanyaya ruwa don ingantaccen canja wurin zafi.Duk da haka, yin famfo coolant a kusa da injin yana cinye makamashi mai yawa, wanda ke rage ƙarfin ƙarfin injin ɗin.Tsarin sanyaya iska, a gefe guda, hanya ce da ake amfani da ita sosai saboda ƙarancin farashi da sauƙi na haɓakawa.Koyaya, har yanzu ba shi da inganci fiye da tsarin sanyaya ruwa.Ana buƙatar hanyar haɗin kai wanda zai iya haɗawa da babban aikin canja wurin zafi na tsarin mai sanyaya ruwa tare da ƙananan farashi na tsarin sanyaya iska ba tare da amfani da ƙarin makamashi ba.
Wannan labarin ya lissafa kuma yayi nazarin asarar zafi a cikin AD.An yi bayanin tsarin wannan matsala, da dumama da sanyaya injin induction, a cikin Sashin Induction Motors ta hanyar dabarun sanyaya.Asarar zafi na ainihin motsin induction yana juyawa zuwa zafi.Sabili da haka, wannan labarin yana magana ne game da hanyar canja wurin zafi a cikin injin ta hanyar gudanarwa da tilastawa.Samfuran thermal na IM ta amfani da ma'auni na ci gaba, Navier-Stokes/momentum equations and energy equations an ruwaito.Masu binciken sunyi nazari na nazari da ƙididdige yawan zafin jiki na IM don ƙididdige yawan zafin jiki na iska na stator don kawai manufar sarrafa tsarin zafin jiki na motar lantarki.Wannan labarin yana mayar da hankali kan nazarin thermal na IMs mai sanyaya iska da kuma nazarin zafin jiki na haɗaɗɗen iska mai sanyaya da ruwa mai sanyaya IMs ta amfani da ƙirar CAD da ANSYS Fluent simulation.Kuma abubuwan da ake amfani da su na thermal na haɓaka ingantacciyar ƙirar ƙirar iska da tsarin sanyaya ruwa an yi nazari sosai.Kamar yadda aka ambata a sama, takaddun da aka jera a nan ba taƙaice ba ne na yanayin fasaha a fagen abubuwan yanayi na thermal da sanyaya injin induction, amma suna nuna matsaloli da yawa waɗanda ke buƙatar warwarewa don tabbatar da ingantaccen aiki na injin induction. .
Ana rarraba asarar zafi zuwa asarar tagulla, asarar ƙarfe da gogayya / asarar injina.
Asarar tagulla shine sakamakon dumama Joule saboda tsayayyar mai gudanarwa kuma ana iya ƙididdige shi azaman 10.28:
inda q̇g shine zafi da aka samar, I da Ve sune ainihin halin yanzu da ƙarfin lantarki, bi da bi, kuma Re shine juriyar jan karfe.
Asarar baƙin ƙarfe, wanda kuma aka sani da asarar parasitic, shine babban nau'in asara na biyu wanda ke haifar da ɓarna da asara a halin yanzu a cikin AM, galibi yakan haifar da filin maganadisu mai bambanta lokaci.Ana ƙididdige su ta hanyar tsawaita equation na Steinmetz, wanda za'a iya la'akari da ƙididdige ƙididdigewa ko madaidaici dangane da yanayin aiki10,28,29.
inda Khn shine ma'aunin asarar hysteresis wanda aka samo daga ainihin hasarar hasarar, Ken shine ma'aunin hasara na yau da kullun, N shine ma'anar jituwa, Bn da f sune mafi girman juzu'i da yawan tashin hankali mara sinusoidal, bi da bi.Za a iya sauƙaƙe ma'aunin da ke sama kamar haka10,29:
Daga cikin su, K1 da K2 sune ainihin asarar hasara da hasara na yanzu (qec), asarar hysteresis (qh), da ƙari mai yawa (qex), bi da bi.
Yawan iska da asarar gogayya sune manyan abubuwan da ke haifar da asarar injina a cikin IM.Asarar iska da gogayya sune 10,
A cikin dabara, n shine saurin juyawa, Kfb shine madaidaicin asarar gogayya, D shine diamita na waje na rotor, l tsayin rotor, G shine nauyin rotor 10.
Hanyar farko don canja wurin zafi a cikin injin shine ta hanyar sarrafawa da dumama ciki, kamar yadda aka ƙaddara ta Poisson equation30 da aka yi amfani da wannan misali:
A lokacin aiki, bayan wani lokaci a lokacin da motar ta kai tsaye, za a iya ƙididdige zafin da ake samu ta hanyar dumama yanayin zafi mai tsayi.Saboda haka, ana iya ɗauka cewa ana gudanar da tafiyar da cikin injin tare da sakin zafi na ciki.
Canja wurin zafi tsakanin fins da yanayin da ke kewaye ana la'akari da tilasta juzu'i, lokacin da aka tilasta ruwa ya motsa zuwa wani yanki ta hanyar waje.Ana iya bayyana juzu'i kamar 30:
inda h shine madaidaicin canja wuri mai zafi (W/m2 K), A shine filin sararin samaniya, kuma ΔT shine bambancin zafin jiki tsakanin yanayin canja wuri mai zafi da refrigerant perpendicular zuwa saman.Lambar Nusselt (Nu) shine ma'auni na rabo na convective da conductive zafi canja wuri perpendicular zuwa iyaka da aka zaba bisa ga halaye na laminar da m kwarara.Bisa ga ƙwaƙƙwaran hanyar, adadin Nusselt na kwararar tashin hankali yawanci ana haɗa shi da lambar Reynolds da lambar Prandtl, wanda aka bayyana azaman 30:
inda h shine ma'aunin canja wurin zafi (W/m2 K), l shine tsayin halayen, λ shine ma'aunin zafin jiki na ruwa (W/m K), kuma lambar Prandtl (Pr) shine ma'auni na rabon Matsakaicin saurin yaɗawa zuwa diffusivity na thermal (ko sauri da kauri na ƙarshen iyakar zafi), wanda aka ayyana da 30:
inda k da cp sune ma'aunin zafin jiki da takamaiman ƙarfin zafi na ruwa, bi da bi.Gabaɗaya, iska da ruwa sune mafi yawan na'urorin sanyaya ga injinan lantarki.Ana nuna kaddarorin ruwa na iska da ruwa a yanayin zafi a cikin Tebur 1.
Samfuran thermal na IM ya dogara ne akan zato masu zuwa: 3D tsayayyen yanayi, kwararar tashin hankali, iska shine iskar gas mai kyau, raɗaɗi mara kyau, ruwan Newtonian, ruwa mara ƙarfi, yanayin rashin zamewa, da kaddarorin dindindin.Don haka, ana amfani da ma'auni masu zuwa don cika dokokin kiyaye yawan jama'a, kuzari, da kuzari a yankin ruwa.
A cikin al'amuran gabaɗaya, ma'auni na kiyaye yawan jama'a daidai yake da magudanar ruwa zuwa cikin tantanin halitta tare da ruwa, wanda aka ƙaddara ta dabara:
Bisa ga doka ta biyu ta Newton, adadin canjin motsin barbashi na ruwa daidai yake da jimillar dakarun da ke aiki da shi, kuma ana iya rubuta ma'aunin kiyaye lokaci gabaɗaya ta hanyar vector kamar:
Sharuɗɗan ∇p, ∇∙τij, da ρg a cikin lissafin da ke sama suna wakiltar matsi, danko, da nauyi, bi da bi.Kafofin watsa labarai masu sanyaya (iska, ruwa, mai, da sauransu) waɗanda aka yi amfani da su azaman masu sanyaya a cikin injina galibi ana ɗaukar su Newtonian.Ƙididdigar da aka nuna anan kawai sun haɗa da alaƙar layi tsakanin damuwa mai ƙarfi da saurin saurin gudu (ƙimar ƙima) daidai gwargwado ga jagorar jus.Idan aka yi la'akari da danko akai-akai da tsayayyen kwarara, ana iya canza lissafin (12) zuwa 31:
A bisa ka'idar farko ta thermodynamics, yawan canjin kuzarin da ke cikin ruwa ya yi daidai da jimlar yawan zafin da ake samu daga ɗigon ruwa da kuma wutar lantarki ta hanyar ruwan barbashi.Don kwararar danko mai matsewa na Newtonian, ana iya bayyana ma'aunin kiyaye makamashi kamar31:
inda Cp shine ƙarfin zafi a matsa lamba akai-akai, kuma kalmar ∇ ∙ (k∇T) tana da alaƙa da haɓakar thermal ta hanyar iyakar tantanin halitta, inda k ke nuna yanayin zafi.Ana yin la'akari da juyar da makamashin injina zuwa zafi cikin sharuddan \ (\ varnothing \) (watau aikin ɓarnawar danko) kuma an bayyana shi da:
Inda \(\rho \) ke da yawa na ruwa, \(\mu \) shine dankowar ruwa, u, v da w sune yuwuwar alkiblar x, y, z na saurin ruwa, bi da bi.Wannan kalmar tana bayyana jujjuyawar makamashin inji zuwa makamashin thermal kuma ana iya yin watsi da ita domin yana da mahimmanci kawai lokacin da ɗanƙoƙin ruwan ya yi girma sosai kuma saurin saurin ruwan ya yi girma sosai.A cikin yanayin tsayayyen kwarara, ƙayyadaddun ƙayyadaddun zafi da ƙayyadaddun yanayin zafi, ana daidaita ma'aunin makamashi kamar haka:
Ana warware waɗannan ma'auni na asali don kwararar laminar a cikin tsarin haɗin gwiwar Cartesian.Koyaya, kamar sauran matsalolin fasaha da yawa, aikin injinan lantarki yana da alaƙa da haɓakar tashin hankali.Saboda haka, waɗannan ma'auni an canza su don samar da hanyar maƙasudin Reynolds Navier-Stokes (RANS) don yin ƙirar turbulence.
A cikin wannan aikin, an zaɓi shirin ANSYS FLUENT 2021 don ƙirar CFD tare da daidaitattun yanayin iyaka, kamar samfurin da aka yi la'akari: injin asynchronous tare da sanyaya iska tare da damar 100 kW, diamita na rotor 80.80 mm, diamita. na stator 83.56 mm (na ciki) da 190 mm (na waje), wani rata na iska na 1.38 mm, jimlar tsawon 234 mm, adadin , kauri daga cikin hakarkarinsa 3 mm..
Ana shigo da samfurin injin mai sanyaya iska na SolidWorks cikin ANSYS Fluent kuma a kwaikwayi.Bugu da ƙari, ana bincika sakamakon da aka samu don tabbatar da daidaiton simintin da aka yi.Bugu da ƙari, an ƙirƙira ƙirar IM mai sanyaya iska da ruwa ta amfani da software na SolidWorks 2017 kuma an kwaikwayi ta ta amfani da software na ANSYS Fluent 2021 (Hoto 4).
Zane da girman wannan ƙirar an yi wahayi zuwa ga Siemens 1LA9 aluminium jerin kuma an tsara su a cikin SolidWorks 2017. An ɗan gyara ƙirar don dacewa da buƙatun software na simintin.Gyara samfuran CAD ta hanyar cire sassan da ba'a so, cire fillet, chamfers, da ƙari yayin yin ƙira tare da ANSYS Workbench 2021.
Ƙirƙirar ƙira shine jaket na ruwa, wanda aka ƙaddara tsawonsa daga sakamakon kwaikwayo na samfurin farko.An yi wasu canje-canje ga simintin jaket ɗin ruwa don samun sakamako mafi kyau yayin amfani da kugu a ANSYS.Ana nuna sassa daban-daban na IM a fig.5 a-f.
(A).Rotor core da IM shaft.(b) IM stator core.(c) IM stator winding.(d) Firam na waje na MI.(e) Jaket ɗin ruwa na IM.f) hade da iska da ruwa sanyaya model IM.
Fannonin da aka ɗora da shaft ɗin yana ba da iska mai ɗorewa na 10 m/s da zafin jiki na 30 ° C a saman fins.An zaɓi ƙimar ƙimar da bazuwar dangane da ƙarfin hawan jini da aka bincika a cikin wannan labarin, wanda ya fi wanda aka nuna a cikin wallafe-wallafe.Yankin zafi ya haɗa da rotor, stator, stator windings da sanduna keji na rotor.Abubuwan stator da rotor sune karfe, iska da sandunan keji sune jan karfe, firam da hakarkarin su ne aluminum.Zafin da ake samu a waɗannan wuraren yana faruwa ne saboda abubuwan da suka faru na lantarki, kamar dumama Joule lokacin da wani waje na waje ke wucewa ta hanyar coil na jan karfe, da kuma canje-canje a filin maganadisu.An ɗauko ƙimar sakin zafi na sassa daban-daban daga wallafe-wallafe daban-daban da ake samu don 100 kW IM.
Haɗaɗɗen iska mai sanyaya da ruwa mai sanyaya IMs, ban da abubuwan da ke sama, sun haɗa da jaket na ruwa, wanda aka bincika ikon canja wurin zafi da buƙatun wutar lantarki don nau'ikan ruwa daban-daban (5 l / min, 10 l / min). da 15 l/min).An zaɓi wannan bawul ɗin azaman mafi ƙarancin bawul, tunda sakamakon bai canza mahimmanci ba don gudana a ƙasa 5 L / min.Bugu da ƙari, an zaɓi ƙimar 15 L / min a matsayin matsakaicin darajar, tun lokacin da wutar lantarki ta karu sosai duk da cewa yawan zafin jiki ya ci gaba da faduwa.
An shigo da samfuran IM iri-iri zuwa cikin ANSYS Fluent kuma an ƙara gyara ta ta amfani da ANSYS Design Modeler.Bugu da ari, an gina wani akwati mai siffar akwati tare da girman 0.3 × 0.3 × 0.5 m a kusa da AD don nazarin motsin iska a kusa da injin da kuma nazarin cire zafi a cikin yanayi.An yi irin wannan nazarce-nazarce don haɗaɗɗun iska da IMs masu sanyaya ruwa.
An tsara ƙirar IM ta amfani da hanyoyin ƙididdige CFD da FEM.An gina raga a cikin CFD don raba yanki zuwa takamaiman adadin abubuwan gyara don nemo mafita.Ana amfani da ragar tetrahedral tare da girman nau'ikan nau'ikan da suka dace don haɗaɗɗun juzu'i na abubuwan injin.Dukkan musaya an cika su da yadudduka 10 don samun ingantattun sakamakon canja wurin zafi na saman.Ana nuna lissafin grid na samfuran MI guda biyu a cikin siffa.6 a, ba.
Ma'aunin makamashi yana ba ku damar yin nazarin canjin zafi a wurare daban-daban na injin.An zaɓi samfurin tashin hankali na K-epsilon tare da daidaitattun ayyukan bango don yin ƙima a kusa da farfajiyar waje.Samfurin yana la'akari da makamashin motsa jiki (Ek) da kuma ɓarnawar tashin hankali (epsilon).An zaɓi Copper, aluminum, karfe, iska da ruwa don daidaitattun kaddarorin su don amfani a aikace-aikacen su daban-daban.Ana ba da ƙimar zafi mai zafi (duba Table 2) azaman shigarwar, kuma an saita yanayin yankin baturi daban-daban zuwa 15, 17, 28, 32. An saita saurin iska akan yanayin motar zuwa 10 m / s don samfuran motoci biyu, kuma a cikin Bugu da ƙari, an yi la'akari da adadin ruwa guda uku don jaket na ruwa (5 l / min, 10 l / min da 15 l / min).Don mafi girman daidaito, ragowar duk ma'auni an saita daidai da 1 × 10–6.Zaɓi hanya mai sauƙi (hanya mai sauƙi don matsin lamba) Algorithm don magance daidaito na tsakiya (NS).Bayan an gama ƙaddamar da haɗin gwiwar, saitin zai gudana sau 500, kamar yadda aka nuna a hoto na 7.
Lokacin aikawa: Yuli-24-2023