Answer / alshaikh

Actually, they have the same principle in the transformer there is no electrical connection between the primary and the secondary (ordinary transformer) and also, in the motor the is no connection between the stator and the motor they depend on the travelling of the magnetic field . In secondary of the transformer is stationary but the rotor is free and it get rotating force magnetic field coming through the air gap

Answer / sethu

This transformer working principle is mutual induction. but motor is self induction or fleming's left hand rule. so this is different to both element

Answer / meetkumar b. patel

in induction motor the placement of winding is so special
and when we give 3 phase voltage with 120 phase difference
in the winding we don't get any rotating magnetic field but
we get 180 direction field for each winding and when we
imagine resultant of this whole three winding we get the
rotating magnetic field

in transformer the placement of winding is not as induction
motor it just have to convert voltages into high or
low............

so both have three phase winding but just the placement and
connection is differ from each other that's y in induction
motor there is a rotating magnetic field and transformer
don't have

Answer / s.suba

In Induction motor, windings are displaced by 120 degree in
space and phase. That is why Induction Motor creates
rotating magnetic field.

Answer / suba

In induction machine the windings are displace by 120 degree
in both phase and space. that is why Induction Motor is rotating

Answer / pugezhenthi.p

In transformer we provide the path [steel] for the
electromagnetic flux. So there is no interaction b/w the
flux. But in Induction Motor there is no separate path for
the magnetic flux. All the three phase fluxes are spread out
to the air gap, at the time only interaction b/w the flues
are possible. The interaction gives total resultant flux,
which is constant magnitude throughout the whole cycle, but
the axis of resultant flux is changes with respect to the
whole cycle. So we call this one as a Rotating Magnetic
Field[RMF].

Answer / rahul shewale

in stator of a 3 phase im windige are placed 120 degree
phase displacements from each othre.each phase produces its
own flux. these fluxes ara not having low reluctance
path.the resultant oo these three fluxes is a rotating
vector.so the flux is called rotating magnrtic flux
in transformer there is low reluctance
path so flux is not rotating

Answer / manoranjan

Because in induction motor there is an air gap whieh makes
the stator flux to rotate in the space but in transformers
rotating flux is not possible since the core act as a low
reluctance path and flux takes that path.

Answer / maheswaran

we know that,in 3 phase every poles has all the three
windings sequentially.. so that in air gap we feel the RMF..

Answer / ashokareddy

Because in induction motor there is an air gap whieh makes
the stator flux to rotate in the space but in transformers
rotating flux is not possible since the core act as a low
reluctance path and flux takes that path.

why doesnt the back emf hold the speed of unloaded series motor?

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