Qhov ceev ntawm lub tsheb tsav lub cev muaj zog yog feem ntau kuj dav, tab sis tsis ntev los no kuv tau los mus rau hauv kev sib cuag nrog ib tug engineering tsheb project thiab xav tias cov neeg siv khoom xav tau heev.Nws tsis yooj yim los hais cov ntaub ntawv tshwj xeeb ntawm no.Feem ntau hais lus, lub zog ntsuas yog ob peb puas kilowatts, qhov ntsuas ceev yog n(N), thiab qhov siab tshaj plaws n(max) ntawm lub zog tas li yog li 3.6 npaug ntawm n(N);lub cev muaj zog tsis raug ntsuas ntawm qhov siab tshaj plaws.lub zog, uas tsis tau tham hauv kab lus no.
Txoj kev niaj zaus yog txhawm rau txhawm rau ntsuas qhov nrawm kom tsim nyog, kom qhov ntau ntawm lub zog tsis tu ncua ua me me.Qhov tsis zoo yog tias qhov hluav taws xob ntawm qhov ntsuas qhov ntsuas qhov tseem ceeb txo qis thiab qhov tam sim no loj dua;Txawm li cas los xij, txiav txim siab tias tam sim no ntawm lub tsheb yog siab dua ntawm qhov ceev thiab siab torque, nws yog feem ntau lees txais los hloov qhov ntsuas ceev taw tes li no.Txawm li cas los xij, tej zaum nws yuav yog qhov kev lag luam lub cev muaj zog heev.Tus neeg siv khoom xav kom qhov tam sim no yuav tsum tsis txhob hloov pauv thoob plaws hauv lub zog tas li, yog li peb yuav tsum xav txog lwm txoj hauv kev.
Thawj qhov uas los rau hauv siab yog tias txij li lub zog tso zis tsis tuaj yeem ncav cuag lub zog ntsuas tom qab tshaj qhov siab tshaj plaws ceev n(max) ntawm lub zog tas li, ces peb txo lub zog ntsuas kom tsim nyog, thiab n(max) yuav nce (nws xav tias me ntsis zoo li NBA superstar "tsis tuaj yeem tuav tsuas yog koom nrog", lossis txij li koj ua tsis tiav qhov kev xeem nrog 58 cov ntsiab lus, tom qab ntawd teeb tsa txoj kab dhau los ntawm 50 cov ntsiab lus), qhov no yog txhawm rau ua kom lub peev xwm ntawm lub cev muaj zog los txhim kho lub peev xwm ceev.Piv txwv li, yog tias peb tsim lub 100kW lub cev muaj zog, thiab tom qab ntawd kos lub zog ntsuas raws li 50kW, puas yuav tsis muaj lub zog tas li yuav txhim kho tau zoo?Yog tias 100kW tuaj yeem tshaj qhov nrawm ntawm 2 zaug, nws tsis muaj teeb meem kom dhau qhov nrawm ntawm tsawg kawg 3 zaug ntawm 50kW.
Tau kawg, lub tswv yim no tsuas yog nyob hauv qhov kev xav xwb.Txhua leej txhua tus paub tias lub ntim ntawm cov motors siv nyob rau hauv lub tsheb yog heev txwv, thiab yuav luag tsis muaj chaw rau siab zog, thiab tus nqi tswj kuj tseem ceeb heev.Yog li txoj kev no tseem tsis tuaj yeem daws qhov teeb meem tiag tiag.
Cia peb xav txog qhov point inflection no txhais li cas.Ntawm n(max), lub zog siab tshaj plaws yog lub zog ntsuas, uas yog, qhov siab tshaj plaws torque ntau k(T) = 1.0;Yog tias k(T)> 1.0 ntawm qhov taw tes ceev, nws txhais tau hais tias nws muaj peev xwm nthuav tawm lub zog tas li.Yog li nws puas muaj tseeb tias qhov loj dua k(T) yog, qhov muaj zog ntawm qhov nrawm nrawm dua?Ntev npaum li qhov k(T) ntawm qhov taw tes n(N) ntawm qhov ntsuas ceev tau tsim loj txaus, puas tuaj yeem ua kom lub zog ceev ceev ntawm 3.6 npaug txaus siab?
Thaum qhov hluav taws xob tau txiav txim siab, yog tias qhov xau reactance tseem tsis hloov pauv, qhov siab tshaj plaws torque yog inversely proportional rau qhov ceev, thiab qhov siab tshaj plaws torque txo qis raws li qhov ceev nce;qhov tseeb, qhov xau reactance kuj hloov nrog ceev, uas yuav tau tham tom qab.
Qhov ntsuas lub zog (torque) ntawm lub cev muaj zog muaj feem cuam tshuam nrog ntau yam xws li qib rwb thaiv tsev thiab cov cua sov dissipation.Feem ntau, qhov siab tshaj plaws torque yog 2 ~ 2.5 npaug ntawm qhov ntsuas torque, uas yog, k (T) ≈2 ~ 2.5.Raws li lub zog muaj peev xwm nce, k (T) yuav txo qis.Thaum lub zog tas li yog khaws cia ntawm qhov ceev n(N) ~ n(max), raws li T = 9550 * P / n, kev sib raug zoo ntawm cov ntsuas torque thiab qhov ceev kuj tseem sib npaug.Yog li, yog tias (nco ntsoov tias qhov no yog qhov kev xav tsis zoo) qhov xau reactance tsis hloov nrog qhov nrawm, qhov siab tshaj plaws torque ntau k (T) tseem tsis hloov.
Qhov tseeb, peb txhua tus paub tias reactance yog sib npaug rau cov khoom ntawm inductance thiab angular tshaj tawm.Tom qab lub cev muaj zog ua tiav, qhov inductance (tshuaj inductance) yuav luag tsis hloov;Lub cev muaj zog ceev nce, thiab cov dej ntws tawm ntawm lub stator thiab rotor nce proportionally, yog li qhov ceev ntawm qhov siab tshaj plaws torque txo yog sai dua li qhov ntsuas torque.Txog n(max), k(T)=1.0.
Ntau ntau tau tham saum toj no, tsuas yog piav qhia tias thaum qhov hluav taws xob tsis tu ncua, cov txheej txheem ntawm kev ua kom nrawm yog cov txheej txheem ntawm kT maj mam txo.Yog tias koj xav ua kom lub zog tsis tu ncua, koj yuav tsum nce k (T) ntawm qhov ntsuas ceev.Qhov piv txwv n(max)/n(N)=3.6 hauv kab lus no tsis txhais hais tias k(T)=3.6 txaus ntawm qhov ntsuas ceev.Vim tias cov cua sib txhuam poob thiab cov tub ntxhais hlau poob ntau dua ntawm kev kub ceev, k (T) ≥3.7 yuav tsum tau.
Qhov siab tshaj plaws torque yog kwv yees li inversely proportional rau cov lej ntawm stator thiab rotor to reactance, uas yog
1. Txo tus naj npawb ntawm cov conductors nyob rau hauv series rau txhua theem ntawm lub stator los yog qhov ntev ntawm cov tub ntxhais hlau yog qhov tseem ceeb heev rau cov to-reactance ntawm stator thiab rotor, thiab yuav tsum tau muab qhov tseem ceeb;
2. Ua kom muaj cov stator slots thiab txo qhov tshwj xeeb leakage permeance ntawm lub stator slots (kawg, harmonics), uas yog zoo rau stator to reactance, tab sis muaj ntau yam kev tsim khoom thiab tej zaum yuav cuam tshuam rau lwm yam kev ua yeeb yam, yog li nws raug pom zoo kom ua. ceev faj;
3. Rau feem ntau lub tawb-hom rotors siv, ua kom cov rotor slots thiab txo qhov tshwj xeeb to permeance ntawm lub rotor (tshwj xeeb tshaj yog cov leakage permeance ntawm lub rotor slots) yog zoo rau lub rotor to reactance thiab yuav siv tau tag nrho.
Rau cov qauv kev suav tshwj xeeb, thov xa mus rau phau ntawv "Motor Design", uas yuav tsis rov hais dua ntawm no.
Qhov nruab nrab thiab siab zog motors feem ntau muaj tsawg dua, thiab kev hloov me ntsis muaj kev cuam tshuam zoo rau kev ua haujlwm, yog li kev kho kom zoo ntawm sab rotor yog qhov ua tau zoo dua.Ntawm qhov tod tes, txhawm rau txo cov kev cuam tshuam ntau zaus ntawm cov tub ntxhais poob, thinner qib high-qib silicon steel nplooj ntawv feem ntau yog siv.
Raws li cov tswv yim tsim qauv saum toj no, tus nqi suav tau mus txog cov neeg siv khoom cov kev xav tau.
PS: Thov txim rau tus nom account watermark npog qee cov ntawv hauv cov qauv.Hmoov zoo, cov qauv no yooj yim nrhiav tau hauv "Electrical Engineering" thiab "Motor Design", Kuv vam tias nws yuav tsis cuam tshuam rau koj kev nyeem ntawv.
Post lub sij hawm: Mar-13-2023