A separately excited dc motor having 2 ohm armature resistsance draws a curren

A separately excited dc motor having 2 ohm armature
resistsance draws a current of 10A and torque developed is
20 Nm under rated field condtion. the speed of the motor
under the rated field condtion , when it is connected to a
100V DC source and delivering 10Nm torque....

Question Posted / sandeep prabha

2 Answers
4461 Views
DRDO, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

A separately excited dc motor having 2 ohm armature resistsance draws a current of 10A and torque ..

Answer / sandeep prabha

any clu... Thanks in advance

Is This Answer Correct ?

4 Yes

0 No

A separately excited dc motor having 2 ohm armature resistsance draws a current of 10A and torque ..

Answer / dharannya

Basic separately excited motor equations are

V=E+Ia*Ra-------------(1)
E=K*W-----------------(2)
T=K*Ia----------------(3)

from the first set of data ie Ra=2, Ia=10 T=20,
and from equation (3)
20=K*10
therefore K=2.

with this knowledge of K
continuing to 2nd set of data ie V=100 and T=10
again from eqn(3) we get Ia as 5A

knowing Ia Ra and V from eqn (1) we get E as 90V

from eqn(2) knowing the values of E and K we obtain w(omega,
ie speed) as 45 rad/sec or 416.67 rpm

Is This Answer Correct ?

1 Yes

2 No

Post New Answer

More Electrical Engineering Interview Questions

please explain how to do 'pole drop test' on generator?

0 Answers

AL=0B9H,bl=75H, ADD AL,BL AL=____________? CF________? OF___________?

0 Answers

How do you select a cable size(cu&Al)for a particular load?

2 Answers

I NEED RRB APTITUDE QUESTIONS AND MODEL PAPER,PLEASE SEND MY E-MAIL joo28_eee@yahoo.co.in

0 Answers

What do you mean by ACB and VCB?

3 Answers L&T,

two parallel conductors are carrying the current in the same direction.which of the following statements is true? (a)there is arepelling force between the conductors (b)the force increases when the distance between the conductors is increased (c)there is an attaracting force between the conductors (d)the force increases when the distance between the conductors is decreased

1 Answers

what does mean ct knee voltage and burden

1 Answers

what is use of mccb.

1 Answers Simplex,

Whats difference between a single phase & a three phase motor?

4 Answers

why motors are rated in hp?

3 Answers

Define liftable weight of a transformer? Does the total weight of transformer include oil weight?

0 Answers

different between highvoltage & lowvoltage source

5 Answers

For more Electrical Engineering Interview Questions Click Here