If the Brsh of DC motor is shifted by 90 deg, then MNA will shift by --degree.

Categories >> Engineering >> Electrical Engineering
Suggest New Category

If the Brsh of DC motor is shifted by 90 deg, then MNA will
shift by --degree.

Question Posted / sandeep

5 Answers
9922 Views
GATE, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

If the Brsh of DC motor is shifted by 90 deg, then MNA will shift by --degree. ..

Answer / rakesh kumar

mna refers to the axis along which the resultant flux is
0 , which coincides with the geometric neutral axis when no
armature current flows but the flow of armaue current
shifts the 0 flux position or the mna in the direction of
rotation in a generator and opposite to it in a motor ,
ideally the brushes should be along the mna as then it
would be unde the influence of no rotational emf induced
due to earlier pole once the the coil crosses the brush or
undergoes commutation , the shift of brushes has got
nothing to do with the shift of mna that is the mna should
remain at the same position , however for the sparkless
commutation mna shoild be along the brush and hence it
would be good if the mna also gets shifted by 90 .

Is This Answer Correct ?

7 Yes

0 No

If the Brsh of DC motor is shifted by 90 deg, then MNA will shift by --degree. ..

Answer / shailesh jadon

there is no effect of shifting brushes on the mnp . the mnp
basially depends on the position of poles

Is This Answer Correct ?

4 Yes

0 No

If the Brsh of DC motor is shifted by 90 deg, then MNA will shift by --degree. ..

Answer / vinit

i am satisfied with mr .rakesh and want to add the.shifting of
mna depends only on armature current(or load current)then how can be decided that mna has sifted by 90?

Is This Answer Correct ?

0 Yes

1 No

If the Brsh of DC motor is shifted by 90 deg, then MNA will shift by --degree. ..

Answer / sandeep

i expect answer to 90. please justify

Is This Answer Correct ?

2 Yes

4 No

If the Brsh of DC motor is shifted by 90 deg, then MNA will shift by --degree. ..

Answer / m raviteja

mna also shifted to 90 degrees

Is This Answer Correct ?

2 Yes

4 No

Post New Answer

More Electrical Engineering Interview Questions

For DG set,if the loading is increased,does flue gas temperature increases or not?

2 Answers NTPC,

what is the meaning and difference between ELECTRICAL DRAWOUT and MANUAL DRAWOUT?

3 Answers

IN CONTROL SYSTEMS Y WE NEED TO KNOW THE STABILITY OF THE SYSTEM?WHAT IS ITS PRACTICAL USE?

2 Answers

How phase to phase voltage comes 440V.

0 Answers

Dear sir, By which formula u can calculate for a particular kv line there is a range of mw.

0 Answers

Why usually in all electrical equipment taking more current in Y pahse like pumps,compressor,or any other applications

1 Answers

what is the difference between contactors & relay.

2 Answers

cany anyone suggest electrical wesites for providing study materials?

0 Answers

Why we use RYB phase sequence?

3 Answers

If AVR fails in DG set what will be the affect?

17 Answers GoodYear, Hotline Glass, HSL,

What is Goerges phenomina to start SYCHNOUSMOTOR?

1 Answers

how sensors are working?

1 Answers Amazon,

For more Electrical Engineering Interview Questions Click Here