Mayank's Presentation on d.c. Motor

8/10/2019 Mayank's Presentation on d.c. Motor

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ACKNOWLEDGEMENT

I VIVEK SINGH standard XII of since section T!eoso"!ica# Inter Co##e$eEta%a! is $en&ine#' t!an(f to M' teac!er )a! D&*e' for !is !e#" and a*#e $&idance

%!ic! I recei+ed for t!e co,"#etion of t!e "ro-ect D.C.MOTO).

I a, a#so t!an(f to t!e "rinci"a# /,' co0st&dents and "arents %!o !a+e a#%a's$i+en ,e t!eir s&""ort %!ic! %as of i,,ense !e#" to%ards t!e co,#etion of t!e "ro-ect.


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CERTIFICATE

T!is is to cerif' t!at VIVEK SINGH !as *een $i+en t!is o""ort&nit' to %or( on t!is

To"ic D.C.MOTO) it is fact&a# t!at !e carried o&t t!is "!'sics "ro-ect &nder t!e

$&idance of o&r "!'sics teac!er Mr.)AH1L D12E3. I !encefort! a""ro+ed t!e "ro-ect

as ,ateria# fact&a# for t!e "ro-ect.

Dr.S1NIL 4ANDE3 Mr. )AH1L D12E354rinci"a#6 54.G.T.6 4!'sics

E7a,iner8s Si$nat&re I


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INT)OD1CTION

T!e "!eno,ena# "ro#iferation of e#ectricit' of d&rin$ t!e recent decades !as s,oot!ened

o&r dai#' #ife.T!ere are so ,an' e9&i",ent#i(e D.C Motor D.C.$enerator A.C.$eneratoretc. W!ic! ,a(e o&r #ife co,forta*#e and eas'. A## t!e de+e#o",ent direct#' or indirect#'

*ased on e#ectrification of t!e &nit. Wit! t!e de+e#o",ent and constr&ction in &r*an and

rar areas t!e needs of t!is e9&i",ent are reai:ed ,ore.

D.C. ,otor is a de+ice %!ic! con+erts e#ectrica# ener$' into ,enica# ener$'.Hence in

a*sence of A.C. "o%er s&""#' D.C.Motor %i## *e +er' &sefTo r&n %ater "&," or to

r&n t!e ,ac!iner' in atta ,a(in$ etc. T!e D.C. Motor is +er' si,i#ar to a D.C. Generator

in constr&ction *&t t!eir f&nctionare different .T!e f&nction of a ,otor is to de+e#o" at%istin$ effort or a tor9e %!en s&""#ied %it! D.C.e#ectrica# ener$' %!i#e t!e f&nction

of $enerate+o#ta$e %!en ar,at&re is ,o+ed t!ro&$! a fie#d.


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AIM; To constr&ct a D.C. Motor.

COM4ONENTS; 5IELD

5?6 SLI4)INGS5@6 2)1SHES

56 2ATTE)3

4)INCI4LE;It is *ased &"on t!e fact t!at %!en a c&rrent carr'in$ cond&ctor

is "#aced in t!e ,a$netic fie#d it tends to,o+e at ri$!t an$#es to t!e ,a$netic #ines offorce d&e to tor9e e7"erienced *' t!e coi# in ,a$netic fie#d. T!e direction of ,otion is

fo&nd *' >#e,in$ #eft !and re.

>LEMING8S LE>T HAND )1LE; It state t!at if t!e fore fin$er

centra# fin$er and t!e t!&,* are stretc!ed ,at&a##' "er"endicar to eac! ot!er s&c! t!at

t!e fore fin$er "oints in t!e direction of ,a$netic fie#d526 and t!e centra# fin$er in t!edirection of c&rrent5I6 t!en t!&,*s "oints in t!e direction of force5>6 e7"erienced *' t!e

cond&cter.

T!e re !as *een i##&strated in fi$.

df B Id# 7 2


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CI)C1IT DETAIL

IELD ;

It is &sa&a#' a stron$ "er,anent !a+in$ conca+e "o#es. T!e ar,at&reIs rotate *et%een t!e t%o "o#es of ,a$net so t!at t!e a7is of ar,at&re is "er"endicar

to t!e fie#ds #ines.

?. 2)1SHES;

>#e7i*#e ,eta##ic "ieces52


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@. SLI4 )INGS;

T!e #eads fro, t!e ar,s of ar,at&re are connect to t!e t%o rin$s )<

)= se"erate#'. As t!e ar,at&re and !ence t!e #eads rotate t!e rin$s )< )= a#sorotatea*o&t t!e a7is . T!is !e#"s to rotation of t!e coi#.

CI)C1IT DIG)AM;


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TO)1E 4)OD1CTION AT DI>>E)ENT 4OSITION

O> THE COIL;

S&""ose t!at t!e rectan$ar coi# A2CD !a+in$ /n8 t&rns is of #en$t! /#8 5AD or 2C6.

Let /28 *e t!e stren$t! of t!e ,a$netic fie#d d&e to ,a$net.Initia##' 5*efore "assin$ c&rrent 6 t!e "#ane of coi# is "ara##e# to t!e ,a$netic fie#d. W!en

c&rrent is "assed t!ro&$! t!e coi# force act on a## t!e ar,s of t!e coi# . T!e force on ar,

DA and 2C *ein$ e9&a# and o""osite canc#e t!e effect of eac! ot!er .If c&rrent is "assed

in t!e direction DC2A >orce on ar, A2 B n2i# 5&"%ard6

>orce on ar, CD B n2i# 5do%n%ard6


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T!e t%o foce are e9&a# and o""osite and !ence constit&te a tor9&e t!e coi# rotate inc#oc(%ise direction i.e. fro, #eft to ri$!t as s!on fi$5a6. %!en t!e coi# *eco,e +ertica#

T!e tor( $ose to :ero *eca&se t!e "er"endicar distance *et%een t!e #ines of action of

t!e force is :ero as s!o%n in fi$ 5*6 so coi# %i## not rotate.

Ho%e+er d&e to t!e inertia t!e ar,at&re is carried t!e +ertica# "osition. As it !a""en t!es#i" rin$ )< co,e in contact %it! *r&s!es 2= %!i#e t!e s#i" rin$ )= contact %it! 2< d&e

to t!is direction of c&rrent is reser+ed fro, A2CD.


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Since t!e direction of ,otion of ar,s A2 and CD $ets re+ersed 5ear#ier ar, AM ,o+e &"and CD do%n *&t no% A2 ,o+es do%n and CD &"6 t!e direction of rotation re,ains

&nc!an$ed #eadin$ to t!e &nidirectiona# ,otion of t!e ar,at&re %it!o&t interr&"tion

ta(es "#ace.

S4EED O> THE MOTO);

T!e rate of c!an$e of ,otion is ca##ed its s"eed. S"eed of

,otor de"ends t!e +o#ta$e a""#ied at ar,at&re ter,ina#s *&t +aries in+erse#' as t!e

,a$netic f#&7.

S"eed BVO

O0n&,*er of #ines of force

Hence !i$!er t!e +o#ta$e a""#ied t!e ,ore 9&ic(#' t!e ,otor %i## r&n *&t stron$ert!e fie#d t!e #ess 9&ic(#' t!e ,otor %i## rotate .

2ACK E.M.>. ;

T!e ar,at&re of a ,otor contin&o&s#' rotates inside t!e ,a$netic fie#d as

t!e ,a$netic f#&7 #in(ed %it! t!e ar,at&re c!an$e d&rin$ its rotation an ind&ce e.,.f.sa' e is "rod&ce in t!e ar,at&re. Accordin$ to Len:8s #a% t!is ind&ce e.,.f. t!e a""#ied

*atter' e.,.f. and it is ca##ed. If E is a""#ied *atter' e.,.f. and ) is t!e resistance of t!e

ar,at&re t!en t!e c&rrent t!ro&$! t!e ar,at&re is $i+en *'0

IBeffecti+e e.,.f.resistance of t!e ar,at&reBE0e)


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E>>INCIENC3 O> AN ELECT)IC MOTO);T!e efficienc' of a ,otor decrease *ot!

d&e to "rod&ction of *ac( e.,.f. and t!e "rod&ction of !eat in t!e ar,at&re coi#. T!e

efficienc' of an e#ectric ,otor is defined as t!e ratio of t!e o&t"&t "o%er to t!e in"&t"o%er .

T!&s

NBo&t"&t "o%erin"&t "o%er

BeE

CONDITION >O) MAXI1M E>>ICIENC3;

It fo##o% t!at efficienc' of a ,otor %i## *e

,a7i,&, if *ac( e.,.f. set &" in t!e ar,at&re is e9&a# to t!e a""#ied *atter' e.,.f. .In t!e

e+ent t!e c&rrent t!ro&$! t!e ar,at&re %i## *e :ero and t!e ,otor %i## not r&n at a## .T!erefore t!e condition for ,a7i&, efficienc' of t!e ,otor is o*tained *' findin$ t!e

condition so t!at t!e o&t"&t "o%er is ,a7i,&,.

No% o&t"&t "o%erBeFI

BeF5E0e6)

T!e o&t"&t "o%er +aries %it! *ac( e.,.f. .T!erefore o&t"&t "o%er %i## *e ,a7i&,

if

eBE=

4)ECA1TION;

5


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!o#d t!e, #i$!t#' a$ainst t!e co,,&tator t!e co,,&tator "#ates %it! fin$ers. W!i#e

!o#din$ t!e, a#%a's "ara##e# s%in$ t!e, aro&nd at different an$#es %!i#e co##ea$&et&rns t!e ar,at&re %it! !is !ands. Note t!e "oint at %!ic! t!e ar,at&re "ic(s &" ,ost

s"eed and t!en set t!e *r&s!es at t!at "oint %it! a #itt#e "atience 'o& are s&re to *e

s&ccessf.

CONCL1SION;

A %or(in$ ,ode# of D.C. Motor !as ,ade.


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2I2LIOG)A4H3

ELECT)ICAL GADGETS.

230 2.K. 2HATIA

=. LA2O)AT)3 MAN1AL IN 4H3SICS. 230).S.MITTAL.

S.SINGHAL

?. MO)DEN8S A2C IN 4H3SICS.

230SATISH K.G14TA

@. >1NDAMENTALS O> 4H3SICS.

230)ESNIK HALLIDA3WALKE)


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CONTENTS

T!is "ro-ect fi#e contains;0

5


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AN

INVERSTIGATORY

PROJECT

ON

PHYSICS


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CONTENTS

This proje! "i#e o$!%i$s&'

()* CERTIFICATE

(+* ACKNOWLEDGEMENT

(,* INTRODUCTION

(-* COMPOSITION OF CEMENT

(.* OTHER TYPE OF CEMENTS

(/* MANUFACTURE OF CEMENT

(0* SETTING OF CEMENTS

(1* SCOPE


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CERTIFICATE

This is !o er!i"2 !h%! 3VIVEK SINGH4 h%s 5ee$ 6i7e$ !his oppor!8$i!2 !o

9or: o$ !his !opi 3SETTING OF CEMENT4 i! is "%!8%# !h%! he %rrie; o8!

!his he


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ACKNOWLEDGEMENT

I 3VIVEK SINGH4 s!%$;%r; @II o" sie$e se!io$ Theosophi%# I$!er

Co##e6e E!%9%h is 6e$8i$e#2 !h%$:"8# !o


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AN

INVESTIGATORY

PROJECT

ON

CHEMISTRY


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INTRODUCTION

Ce


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COMPOSITION OF CEMENT&'

The %7er%6e o


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HIGH ALUMINA CEMENT &'

I! is esse$!i%##2 % %#i8< %#8


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The esse$!i%# r%9 i;e %$; iro$ o>i;e o5!%i$e; "ro

Mayank's Presentation on d.c. Motor

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