Section' ME4#*A# Date $er+or!ed' )anuar& #, #01Date Su%!itted' *e%ruar& 1, #01nstructor' Engr. Christian . $ao
Data and Results
a%le #.1 2 DC otor $arts and Co!ponents
DC Rotor Assembly with Labeled Parts
Identifed Parts and Component
Co!!utator
Ar!ature Core
Ar!ature Coil
*ield inding
Ar!ature inding
Function / Purpose
t seres as recti5er and collects the current generated in ar!ature conductors. he ar!ature is %uilt up o+ thin la!inated circular steel dis6 +or reducing edg& current losses. t is responsi%le +or cutting 7u or !otion. he& are usuall& !ade o+ copper. *ield coils are +or!er 9ound placed on each pole. t is usuall& a +or!er 9ound copper coils 9hich rest in ar!ature slots.
Sha+t
A rotating !achine ele!ent used to trans!it po9er.
Ale
A sha+t around 9hich 9here it rotates.
a%le #.# 2 DC Stator $arts and Co!ponents
DC Stator Assembly with Labeled Parts
Identifed Parts and Components :o6e
Function / Purpose
Seres as support or outer coering.
;rushes and ;earings
t collects the current +ro! the co!!utator.
$ole Coil
t seres as conductor to spread out the 7u in air gap uni+or!l&.
$ole Shoe
t carries out 5eld 9indings and supports 5eld coil.
utside dia!eter o+ stator?s &o6e ring nside dia!eter o+ stator?s &o6e ring Air gap ength o+ stator?s +ra!e hic6ness o+ stator?s &o6e ring
nit $cs. !! ! teeth !! !! !! %ars units !! !! !! !! !! !! !! !! units
#.4 2 Su!!ar& o+ Design Calculation
Stator!s "o#e $hic#ness @Do2Di/# B t :o6e Do B :o6e Di B
1-.4 !! 214.0 !! =.4 !!
t B @=.4/# !! t B 3.= !!
Interpretation o& Data and Results
Air %ap @pole2Drotor/# B Air gap B t Distance o+ pole +aces B 84.33 !! otor Dia!eter B 2 =8.8 !! . .3 !! t B @.3/# !! t B #.=- !!
he electrical !achine li6e !otor or generator, consist o+ t9o %asic electrical parts. he constant changes and process help the 9hole c&cle to %e +unctional. he rotor and stator are the t9o %asic parts that consisted %& other co!ponents. Each co!ponent has the purpose to 9ithstand the 7o9 o+ current to %e a%le produce a !agnetic 7u.
Conclusion there+ore conclude that the co!!utator acts as !echanical recti5er. Co!!utator is the onl& part that diers +ro! the generator and !otor. ;e+ore the inention o+ se!i2conductors recti5cation at high currents inole serious losses.
Question(s) and Answer(s):
.1 Discuss the operating principle o+ !echanical recti5er. .# A +our2pole !otor has an ar!ature haing #=- conductors. Each pole +ace is designed and constructed 9ith # s(uare inches 9ith 7u densit& o+ 4=00 lines per s(uare inch. + the ar!ature current is designed at = a!peres and the construction o+ 9indings is # parallel paths, eri+& the tor(ue in this !otor. .3 During the operation o+ DC !otor and DC generator, eplain ho9 rotor and stator 9or6s. .4 he car o+ ight ail9a& ransit @ is propelled %& --0 olt DC !otor connected to DC +eeder lines o+ recti5er station. he car is re(uired to eert a tractie eort o+ 4006g at a elocit& o+ 06!/hr. o9 !uch the current 9ill %e dra9n +ro! the +eeder lines i+ the oerall eFcienc& o+ !otor and 7&9heel is -GH @
TECHNOLOGICAL INSTITUTE OF THE PHILIPPINES
1338 Arlegui St., Quiapo, Manila
EE 004 / DC and AC Machineries Eperi!ent " 1 $reli!
