Respuesta :
An induction motor or asynchronous motor is an AC electric powered motor in which the electrical contemporary within the rotor had to produce torque acquired by electromagnetic induction from the magnetic area of the stator winding. An induction motor can therefore be made without electrical connections to the rotor.
Used in nearly every method, induction automobiles are specially utilized in water pumps, kitchen home equipment, fanatics, air conditioners, cars, and commonplace commercial machinery like boiler pumps and compressors.
Induction cars are categorized into two sorts namely single-phase induction motors and 3-section induction motors. As their name indicates, a 1-phase induction motor is attached to a single-segment AC electricity supply whereas the 3-section induction motor may be linked to a 3-section AC energy supply.
Given, supply frequency,
f= 60 Hz
full load speed, Nf= 1725 rpm
number of poles, P = 4
(a) Synchronous speed , Ns=120f/P
=120X60/4
=1800 rpm
(b) We know the formula for Full load-speed
Nf= Ns (1-Sf)
where Sf = full load rotor slip
Nf/Ns = 1-Sf
→ Sf=1- Nf/Ns= 1 -1725/1800
= 0.0416 or 4.16%
Sf = 4.16% or 0.0416
(c) Frequency of rotor, fr = Sff = (0.0416) (60)
fr = 2.496 Hz
=2.496 Hz
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Induction motor ratings are 2.496 HZ.
Given, Supply frequency, f = 60 12
number of poles, P = 4
full load speed, Ne= 1725 rpm
Synchronous speed; No= 1201= 120X60 = 1800 rpm
P = 4
We know the formula for Full load-speed
Ne = N's (1 - Sf)
Where she = full load rotor ship
Ne = 1 - SP
SQ = 1- Ne = 1- 1725 = 0.0416 DY 4-16%
NS = 1800
SQ= 4. 16 % or 0.0416
Frequency of Motor, fy= Sgif = (0.0416) ( 60 ) = 2.496 Hz
fr = 2.496 HZ
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