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 the purpose of %impedance for transformer

3 Answers  

Using 11000V/433V,3 ph,50Hz,500 KVA, what is the maximum capacity of motor in KW that can be connected and started at a single moment? Also explain about any calculations and formulas used in deriving the same.

4 Answers  

1.why is +1+1=+2 why cant it be +3 2.Why is +1*-1=-1 why cant it be something else 3.why are the hilly areas more cooler than the ordinary areas?

5 Answers   ThyssenKrupp,

could anybody able 2 send me jindal steels previous papers fr electrical steam....pls send 2 my id if possible....sirisha.shaik@gmail.com

0 Answers  

how to protect motor in dol starter having capacity of 30 hp.40 hp?

0 Answers  

HOW TO REDUCE POWER PLANT AUXILIARY POWER CONSUMPTION?

0 Answers   TATA,

why zero sequence impedance measurement is not applicable for single phase GT

0 Answers  

If the ceiling fan is on slow speed, does it consume less electricity?

2 Answers  

how to decide the rating of the ct for 1500 kva transformer

1 Answers  

why r we using vaccuum circuit breakers in the place of m.o.c.b.

1 Answers  

why voltage ratings of xmission are in 11, 33,66kv and why not 11.5 ,16,19 or any other

2 Answers   HCL,

how to calculate transformer load?

0 Answers   Lanco,