If the Brsh of DC motor is shifted by 90 deg, then MNA will
shift by --degree.
Answers were Sorted based on User's Feedback
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 |
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 |
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 |
why do we put a transformer on soak before loading it
1.what is the reason for transformer and lightning arrester blast in 33kv system
How can calculate the rating of a servo stabilizer for given a specific load
if you short the any 2phase(R,Y,B),why fuse get blown?
what is the diff between mcb and vcb
what is the difference between mho characteristics and quadrilateral chara in distance protection
What is the technical difference between On delay timer and a Star delta timer?
IF we have 500kva transformer & know the current on HT & LT side, how can we consider for its breaker?
If single phase having 220v so why 3phase is440v.
Who are the manufacturer for Nitrogen based Fire Protectio/explosion prevention for Oil Filled Transformers? India and international both?
what is the working and construction of generator
Why field rheostat is kept in minimum position?