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Assignment No o2
Te 9 ihe ase aalvackal es ~ of clechiic_breakin | eacere
mechanical breaking -2—————____—— 7
> Advantages i= ——
~~ @ BieckicGroaking
any _snakching —as_—comp:
chee Spes
is_mare_smooth—and_withouk
ared tn the othes ——
roaintenance,
tn absence of brake shass:
ea due
@ Higher efficiency.
the Kinebi 2p. tential nexgy
beacuse in mregens: hive
i crolura back.
(@ che _elechie braking —allow he —daive
cpexale- at highe “peed and _al _havier
loads:
@ xthere 1¢_no-po Sbilily nf-failure af elechs
beraking nyskena dlue 4 “heal-_as incase
of mechanical Jbrraking-
2 1G at _provide- "eid beeing of Acad
campared. _to- mechanical —brekeg-
____ motors
and —costing--—__——
@_Smai\_weight 4+size.—
bua) ep plain “pynamie- Greaking operation. eoith
7 ronedtenshies—
_of follocaing- _ dative +
@ scanned with OKEN Scanner—=This_is_sel_up_of dhe. _dynamic Breaking i
~————arbeostalic baking of de—shunl_mei*
A_Sppt__gwilch_svi__has been. used ky
—_Selecl_mode_ of. operation as either tig,
02 Baaking.. x
Breaking Mode i=
~Toa_inifiate the —breaki ng—ithe shia 8
Rs lfered_tn_the breaking position. E
Breali
—_
gels.
~—__terersed ag. Compared esith camakure. tii
. direction in the Newmal lead. -
~————=“Therefone the _ dliceckion_of_b-ralin —torgue—
st “Produced iy the. —m ctor_due be this “anal
1 tumernt ts_exackty Seles the_opposihe _diredion-
te —airectinn “ef amkehan nema
‘ Se= & = Wau ~ kvow
ei | Rot Revie ats “Rat
@ scanned with OKEN Scanner—h. 8 wilh the diagram Speed torque chairackemitic
Se —— ~
= eeeplaincledhte teal ng—of_de _Senes_rnotor—
= Comm 3) A cry fe
— Pah \ hit _)
hy
BG, BB?
a — cs fa,
and _onmabyne_tdindings ~are_cannecked
in series acmss the de Supply. Lbag'
power
|= ota dynamic brealcing _tmode the
| te diseannarked & breaking nesishn
Nal connected in sucha _eoay thet fi 1d
_exrent _Cantinuns te fom in sam
The painciple ‘ ak
discussed for the -ather shoo dypes_ofde
rooter + Speest. 2
“+ age sbaaling, “| Breaking initialed
mea eS
4 Cini dt
a Tt nag 2
monk.
reed 7 7
error
Bring SN mglor _
ue stops Croteng)
Disadvantnges t= ——_____—
~The disadvantage —o £ dynaric_breakieg ielbal oe
a ange power grid *gel_d jpiated in extemal _
scesistance_-This_ Power —i. jusl_tpasled in
7
scanned with OKEN Scannerare 4). Beplato Regeneralive breaking — of de Shug
motor draw. speedtorgque
== Neral moder” .
tt = ——
om co AL eS
Suppy
paige el Oj.
ete, — ~
Regenerative Breaking :~
=the load cause the speed of the mi,
———__4m increase ahave the nammal
Nigher - than the upply. rvallage
ed Sea eee
ee as_shoon 4 power rehire back fram 4th:
-ormakire to pe Soince- Thu. mabyr_nad
ada genenalor. : im
aaa Ge Sy aoe
LC oo f
= ohenewer_genoralen is lnaded ih speed
| —olecrease,__ cree
ies pele at gpcamlien
‘
so ing_ttmabe —
____brreaking—parcess eff
fRecbive, ——
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j
i—.
motoring torque
hall
hen Fed _seperabelly _pe_me toy dade ——
1 Gx Je.
a mAng—2ngle
behneen _=spe:
——> A
| EI 2 Feld unconbrolled
| - ar_| pe
+ 1 :
aan deg Convertor [|
ees
_ Gut Explai OW opexation of si angle _phase—fully con!
Sao
\esthe pater _chrcil foro fill cary
fr 4 deo —steperally excited_molnx_and
“waveform for go and go’ are Sheen
= “The _oxerage armature. roltage —Eo— either
_ positive oa negative —clepending— on the value
ete gee poing oe glee _and_allews_the_operahisn
—___4n take —place—tn fixst—oa_fourth quadsant—
_open.alinn!: eae
—___ @peckifrer_made..C4<30")_*_maloring——-——_—
the toave form forthe _qreclifienoperalion
Ct cg) the. thyaishor 1_and_82 condi:
Con 6 re
p= es 2m Co. =
Prec
Te for xa <40° a is ave.
@ scanned with OKEN ScannerSTavevsian_ mode (295): Reg enexati
nee Ascexrage _ovrmabure dbage fa f
neg dhive
“Tf mate's back eme CER) Peversed by,
—————-frewersing field excitations the machine
will -hehave as o 4 generator and will
feed powen ahadk. ty po Lup ply
= Th) is kn
(On _a: nenabice — boreal —
~———+1f_demoloy. |
S feoag. angle of, -ormidare consoles —
eee ~A>Jo*
Bas) Eel | -Geplain. Bites oporahie “of ae oe
ata ole . —Oc:mahee die ith
Pee SG ea bette pian
cherasbeniets.c :
SA chopper Can “puadace Q_variahle de—
T
@ scanned with OKEN Scannera ef the de maton bo scan its Ss peed.
io chopper based
ye de
mnotocrr res —_
e Nde is —applied
ab the input of a chappe -Afixed —
dco voltage i applied aomss the
field winding ‘eockor, to__panduce
a mabed field —cuement-
(= A vaniable axmature volt 19.2 denived
Speed 7
fora the choy peac—thal_can he nage red
class: In ale to implement the
armature + wolkage Control
=Tergue = peed “characteris S__are ag
Follow + . a a
discontinuos ermelure ¢
Vl t= uly cycle,
X ——ceokinuss armmahure
- "These bype of
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124A 41 coa.npreSeperally ercile,) :
dc motor has _an__amimahure oresishe,
motor is_ cbnblled try _chopp ens
quency__of 51 00 Hz. and so UNC ya),
: by
of 990 v- caleulabe 4 hhe—duby cation oy 1.
| Bur = 86 vik ~—© - :
co
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Gort Taka : i
1 = 86 + Cn-8 x2)
Pee ee
bid Vas D%Vde—
- ot bt Vo - 143
| Vie 220
1
D 20-69u%
SSS
Que 1) A Qony, 81S apm [so A de pescably exciled
: pootor hos an armabure ae ET) 06.
2... i} ig -fed_frorn_single —phose
crecti fren: enith Ac uae of g207_, SoH:
Assume Continuse Conduction , Cal culake
1y Foring angle fox_araled_malnr torque of
Goa-cpm
2) motor peed fora elect eraled_toapue.
—— Given + . z
N= 200 volt =
N = 84S~ eeprm_
=a enabled) =152 8
Ld fins commenter derisce =
“Ns = 990%
f= sD}
Ra = 0:06 2
ry 2 G00 wpm
~ Kg = 160°
te fads: ) oy ak “Tebed 41s
5 Na _ak “Traled diatas)6e" Bes”
|
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ee fal n= Svo 299 20. a
cee rox ka dn
coe 4 fr & kab hy oe
— for ND
coe Ep N z
eae “- £51 = _sdo x 19)
185 7
pase G1 = lle voit ener
ae he value of a: oubput ty oF the fu) tn
——__= | Canes pending bVew
see Naeem ed + Ta crated) Ra
cee =l6e+ Csoxooe) +
sau Nat_= 13066 wolk £
— 2N2x220 . Cp Ay = 130-66
—, ae
— 198 a =1\s0-66 ee
poe al X12 Cos Co-6e)
ere eens tse TE a
ae Beene
—___ vse oe x 220, qe ee eee eeeceeec eee
é ‘ etl:
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Eun =-186 + (isp xo-n6)
= -I47 solt
oS
we know +hab
co Ee, = he
ooo Er nN
Me = Se xn
£5
i =NW9X gas
ig}
We = 310-9 apm |
| a,
—————————
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