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Proiect Masini ElectriceII

MOTORUL ASINCRON

TRIFAZAT

Student: Mirestean Marius-Mihai

An III ET ru!a "#"

Coordonator: $raos Ursu

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I% Cu!rins:

Tema de proiectare............................................................pag.3

Memoriu de proiectare......................................................pag.4

Fisierul cu rezultate din MATLAB....................................pag.5

Caracteristici de functionare..............................................pag.11

Sectiune detaliu crestaturi!...............................................pag.1"

#esen de ga$arit.................................................................pag.1%

Calculul de incalzire...........................................................pag.&'

&

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II% Te&a de !roiectare

Sa se proiecteze un motor asincron trifazat cu rotor in coli(ie in scurtcircuit ) in

constructie cu talpa care sa ai$a urmatoarele caracteristici*

+ puterea nominala * PN ' (( )*+,

+ turatia sincrona * n(' ./0 )r!&,

+ tensiunea nominala * UN' 100 )2,

+ frec(enta nominala * 3N' /0 )45,

+ randament nominal * ,N' 667.)8,

+ factorul de putere * cos9N ' 07.

+ curentul de pornire raportat * -)5=

N

P

I

I

+ cuplul de pornire raportat * 4)&=N

P

M

M

+ cuplul maim raportat * /)&ma.

=

NM

M

+ coneiune stea0

+ clasa de izolatie F dar cresterea temperaturii (a fi corespunzatoare clasei C0

3

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III% Me&oriu de !re5entare

n urma proiectarii au rezultat urmatoarele caracteristici te2nice*

+ randament nominal * ,N' 6;7. )8,

+ factorul de putere * cos9N' 0766

+ cuplul nominal * MN' (1070/)N&,

+ curentul nominal * IN'"(76; )A,

+ curentul de pornire * IP'("70" )A,

+ cuplul de pornire * MP'/("7( )N&,

+ curentul de pornire raportat * "")5=N

P

I

I

0

+ cuplul de pornire raportat * /5)3=N

P

M

M

0

+ cuplul maim raportat * /%)3ma.

=

NM

M

0

4

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I2%Fisierul cu re5ultate din MATLAiles in *mat* format to sa@e results for diffrent speed and @oltage

% Parameters of Clectrical machine%

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oltBoles =1.!!!!!!; % >actor to allow for bolt holes in stator core>W = .!!!!!!; %W >riction and windage loss at full load speed% tator windingsI1=7; %

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slotlpha=!.)(E!; %rad, angle between two stator slotstauslot=)7.(7E; %mm, stator slot pitch at boreslotrea=)(.))1!1-; %mm9slotWindingrea=).(!)-); %mm9, lot area need for windings% tator slot insulationslotFnsul

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8s=.E)1; %mm9 tator current densit+8r=.!!!!!!; %.mm9 6otor current densit+slot>ill=!.(1E(7; % fill factor for stator

% 5agnetic inductiongAma$=!.)(1); %< air0gap magnetic inductions

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s5s=.1; % 5outh of stator slot mm.sh(=!.-; % height of slot mouth mm.slpha=.; % degreessh=!; % in this case as winding fills slot%6otor slots 0 Primar+ dimensions%rlotkew=7; % 6otor skew = 1rlotkew of rotor peripher+rlothape= 3*b*4; % 6otor slot shaper5s=1.; % 5outh of rotor slot mm.rh1=!.;%charge of materials8s=; %mm9 tator current densit+8r=; %mm9 6otor current densit+8endring=(; %mm9 :urrent denssit+ in rotor end ring of rotor cageelsp=1; %km pecificate electric loadsiles in *mat* format to sa@e results for diffrent speed and @oltage

1'

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2% Caracteristici de 3unctionare

11

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1&

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13

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15

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2I% Sectiune =detaliu crestaturi>

1/

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2II% $esen de a?arit

1"

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1%

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1-

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2III% Calcul de incal5ire

artile motorului care se dez(olta caldura sunt* infasurarile pac2etul de tole si lagarele. ierderile de putere care apar in motor la functionarea acestuia in regimul nominal sunt*

+ Cu1 1067.8167790

+ Fe 26.1186620

+ Cu& 992.0925680

+ mec 50.4693280

Calculele au fost realizate in MatLa$

Sec(enta de progam este*%000000000000000disp"*================'erificare termica==============*#%date intrarepcu1=1!7.-177E; %tator windings lossespfe=.11-; %Fron Joss 0 primulpcu=EE.!E-; %6otor windings Josspmec=!.(E)-; %5echanical lossdo=)1.!!!!!!; %diam e$terior al statorului %tator ?2bprim=)11; %din gabarit este *LLLLLLalfao=1(.); %constantakl=).); %se alege ) 0 ),%000000000000000000000000000000000000%calcule

s=pi&do9(s1=sKpi&do&1.7)&bprim&kltc="pcu1KpcuKpfeKpmec#alfao"s1Ks# %temp carcasei fata de mediul ambiant%==============%date intraredeltaa=7.e0; %constantal1=(!.!!!!!!; %lungimea masinii %:ore lengthlambdaa=!.!; %constanta%00000000000000%calculese=pi&do&l1as="pcu1Kpfe#sets=as&deltaalambdaa %incalGirea pach de tole fata de carcasa

tfe=tcKts %incalG pach tole fata de mediu%===================%date intrarebetai=!.e0); %constantalami=!.1; %constantash1=!.!!(E)EE;sw1=!.!1!E;n1=) % nr de sloturi in stator

&'

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%000000000000000000%calculescr="&sh1Kpi&sw1#&l1&n1ai=pcu1scrti=ai&betailami

tcu=tiKtfe %FncalGirea infasurarii statorului fata de mediul ambiant

%==================%partea de @entilatie@= 1 %@iteGa aeruluialfa@=alfao&"1K1.)&sHrt"@##tc1="pcu1KpcuKpfeKpmec#"alfao&sKalfa@&s1# %temp carcasei fata de mediul ambianttfe1=tc1Ktstcu1=tfe1Kti

ezultatele progamului sunt*

6erificare termica

s& -./"/&e7''4

s1 &.'54/e7''/

tc /.-44"e+''5

se 4.4""'e7''5

as '.''&4

ts ".33'4e+''/

tfe "./"""e+''5n1 &3

scr &4".-/%'

ai 4.3'/3

ti '.'1'%

tcu '.'1'%

( 1&

alfa( "%./-"/

tc1 1.31'1e+''5

tfe1 &.'43&e+''5

tcu1 '.'1'%