Answer / farha

Armature reaction for a dc generator:
Consists of 2 cases:1. when generator is operated without
load and 2. when generator is operated on load.

When generator is operated on no load only main flux(due to
poles) is produced.Now when load is applied,flux cuts
through the air gap and produces a counter flux due to
presence of armature.This flux caused by the presence of
armature distorts the main field flux,hence shifting the
magnetic neutral axis in the direction of rotation of the
generator.This causes heat loss.For a motor, the direction
of shifting of Magnetic Neutral axis is oposite to the
direction of rotation.
Since this loss occurs due to action of armature, it is
known as armature reaction.

Answer / sanjay kumar

reaction between armature flux and main field flux

main flux will be weak(less) with armature reaction which
is responsible for low efficiency.

Answer / tushar gawas

The effect of armature flux on main flux is called as
armature reaction.the armature flux cuts the main flux
hence an E.M.F is indunced in armature conductor which
causes rotation of motor.

Answer / rakesh kumar

well armauture reaction is the effect of armature flux on
the main field flux , the effect of armature reaction in a
dc machine is cross magnetising that is to distort the main
field flux and if the effect of saturation is taken into
account then it leads to demagnetisation as well. in case
of a dc motor the armature flux the flux at the leading
pole tips are weakened while it is strenghtened at the
trailing pole tips .

Answer / azhagu

The current flow through the armature conductor, the
armature produced flux. This armature flux oppose the main
field flux (supply flux).so main field flux is reduce. THis
effect is called armature reaction.

Answer / george

armature reaction is the reaction which is the effect of the
magnetic filled set up by armature current on the
distribution of flux under main poles of a generator.

Answer / brown

Why is't that induction don't
flows in currents

Answer / sumantkumar

It is the effect produced by armature flux upon the distribution of the flux under the main pole is called as armature reaction.
OR
The effect of armature flux on main flux is called as armature reaction

Answer / ansh kohli

armature reaction is the effect of
magnetic flux set up by armature
current upon the distribution of
flux under the main poles.

Answer / akhil

armature reaction is the effect of armature flux on main flux.all current carrying conductors produces magnetic field.the magnetic field produced by the current in the armature affect the flux pattern and distort the main flux and distortion causes a shift in the neutral plane. it will affect commutation

WHAT IS A BASIC DIFFERENCE BETWEEN THYRISTOR,TRIAC AND A DIAC.AND WHAT R THERE APPLICATIONS?

5 Answers   Petronas, TCS,

what are the compensations considered while designing a transmmision line.

1 Answers  

Is ground earthing required for neutral conductor of a prime mover ie DG set?

1 Answers  

Why transformer, generator, ups rating kva?

2 Answers  

What is percent age of scrap of wires as per IE Rule Clause No in wiring for House and Industrial wiring ?

3 Answers  

what is the role of MPU in DG set

1 Answers   Weltech Engineering,

What is the basic principle of welding process?

0 Answers  

some ac motor's direction get change dueto ghanging input to the ac drives.(say ryb to rby). but some motor direction remains the same when phase sequence is changed fromdive side. can anybody guide me?

1 Answers  

Please mention available current rating for MCB,RCCB,MCCB in the market or any website

1 Answers   ETCO,

Electrical Design specifications

1 Answers   Sabic,

What kind of socket shall be provided for window type air conditioner with cooling capacity upto 18000 BTU/hr

0 Answers  

In CT, burden is 15 VA and protection 5P20,CT ratio is 100:1 then what would be the knee point voltage ?

2 Answers   ERL,