Answer / sandippatel2310

all indian trains run at 25 kv ac. only in mumbai church
gate area d.c system is still in use.
Lights and fans run at 110V DC system through batteries
under the coaches.
Locomotive uses DC series motor, 25KV is stepped down by
transformer and converted to DC by rectifiers inside the
locomotive itself.
Induction motor not used
DC series motors are used as they have high starting torque.

Answer / sharan dilip

dc shunt motor are never used for traction.
it has drooping characteristics of Torque Vs Speed hence dc
shunt motor is not employed.
The characteristics of dc series motor suits best for that
application. its better if you observe the characteristics
of dc series motor.

Answer / kans

25000v ac system,bt rectifier unit inside loco, dc series
motor is there.

Answer / y.hari kishore babu

Trains opreating voltage is 25 KV, DC series motors are used
in traction. All lights, Fans are operated at 110VdC supply.

Answer / veer thakur

All the fans and tube light of train are started on 110 v dc dupply and use universal motor in the fan

Answer / sharan dilip

Its good question.
But for a motor the mechanical characteristics (T Vs N) are
concentrated.and even though the if the load increases the
speed would decreases for shunt motor.But in the case of dc
series motor both armature current and field current are
same and at much higher loads also the torque can be maintained.
For dc series motor we operate in such a circumstances such
that at constant torque and variable speed.

Answer / ganeshkumar1453

but in torques and speed characteristics of d.c series motor is parabolicly decreases na .y we should see the characterisitc between torque n speed

Answer / ganeshkumar1453

Sir Sandip patel
u have D.C seies motor is used in locomotive . Can u explain what is locomotive.More over D.C series motor is used as boosters,it cannot maintain constant speed na.So D.C shunt motor is used na please reply.
any one can rpy...

Answer / ganeshkumar1453

Above question continuation
y d.c seried motor in train.trains r driven by D.C shunt motor right at what voltage

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