Answer / samir

dc series motor

Answer / mrityunjoy

dc series motor

reason:- In trains there are many comartments full of
passengers,so during the starting it requires high starting
torque and in dc series motor torque T proportional to Ia
square and Ia=If,so if the motor started without any load
then the armature current will be very high which may
damage the motor.

Answer / rajesh.b.jadav

d.c series motor as it has a high starting torque
characteristics

Answer / dipsmita das.

dc series motor.

Answer / srikrishna

kongrates 2 all.. hu said dc series motor.

since the starting torque is very high, obviously this motor
is widely used for traction purposes..

the ratings of komn dc series mtr used for traction is,,

750v dc
650A
the gear ratio is 63:17
each locomotive (train engine)consists 6 such motors.
for more details on this topik kontakt me on mail id

Answer / glinto francis

dc series motor becouse high starting torque.this type of
motor is suitable for traction purpose.

Answer / sanjay dalvi

Dc series motor is used because it have characteristic of
HIGH STARTING TORQUE IT PICKS UP LOAD WITH CONSTANT SPEED.

Answer / ipsa

obviously d.c series motor used in train,hoist,conveyer etc
due to its high starting torque.

Answer / k.prakashchandra

Series motor while starting is OK. But how to vary the speed
while running ? Is change over to shunt connection done ?

Answer / ramasamyseenu

in the engine side it uses two dc series motor and one 3phase induction motor and the purpose of dc motor is to give high starting current and to make the locomotive to move and to overcome the inertia offered during motion. The purpose of dc series motor is also to perform regenerative braking with 3phase induction motor. The purpose of three phase induction motor is to operate the engine in constant speed.
The motors which are connected below the train compartments are dc series motor it also complements the motion of train from rest thus by reducing load on the train.

can we install LT panel & HT panel in one room?

1 Answers  

Differenciate between circuit wiring and sub main wiring with illustrations

0 Answers   MU,

In the diesel generator if there is an AVR (auto voltage regulator) gone faulty, in this condition is there any way to generate the voltage from the alternator? I need a brief explanation can you please help somebody

1 Answers   Vodafone,

when we should use Central Battery system and UPS system and why? in other words, what are the differences between the two systems?

1 Answers  

Dear all i want to know SEWA Electrical Supervisor Licence test Previous Year Questions ? If any body know please send to me zohairaukllah@yahoo.com

0 Answers  

Explain the operation of variable frequency transformer?

0 Answers  

define the non synchoronism of synchoronous machine in general g or m??

0 Answers  

Relative synchronous generator

1 Answers  

How do i right a ladder diagram that has 1 actuator that performs a full stroke followed by a half stroke

0 Answers   Tata Motors,

Hi Everyone ! My Name is Hakim ullah khan please i need formula of Cable Rating because i want to calculate by self without check any Table Chart... Thank you.....

0 Answers  

We have 800KW motor operating at 6600Volt,50 Hz supply.During 1st startup it tripped on overcurrent trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad was set on .94 initially.then we set at 0.97 and then it started fine.i dont understand why it tripped first?What are the protections which comes in picture during starting ?

6 Answers  

How to model "to find the cube root of the given number" in Matlab Simulink ?

1 Answers