Synchronous Speed
The rotating magnetic field made by 3 section windings may are made by rotating a permanent magnet’s north and South Pole at synchronous speed, (shown as N and S at the ends of the flux phasors in Figures twenty two.1(b), (c) and (d)). For this reason, it's referred to as a 2-pole system And an induction motor victimization 3 section windings solely is termed a 2-pole induction motor.
If six windings displaced from each other by 60° area unit used, as shown in Figure twenty two.3(a), by drawing the present and resultant magnetic field diagrams at numerous time values,
it should be shown that one cycle of the provision current to the mechanical device windings causes the magnetic field to maneuver through 0.5 a revolution. the present distribution within the mechanical device windings area unit shown in Figure twenty two.3(a), for the time t shown in Figure twenty two.3(b).
It is seen that for 6 windings on the mechanical device, the magnetic flux made is that the same as that made by rotating 2 magnet north poles and 2 magnet south poles at synchronous speed. this is often referred to as a 4-pole system And an induction motor victimization six section windings is termed a 4-pole induction motor.
By increasing variety|the amount|the quantity} of section windings the quantity of poles is multiplied to any even number.
In general, if f is that the frequency of the currents within the mechanical device windings and therefore the mechanical device is wound to be appreciate p pairs of poles, the speed of revolution of the rotating magnetic field, i.e., the synchronous speed, ns is given by:
The rotating magnetic field made by 3 section windings may are made by rotating a permanent magnet’s north and South Pole at synchronous speed, (shown as N and S at the ends of the flux phasors in Figures twenty two.1(b), (c) and (d)). For this reason, it's referred to as a 2-pole system And an induction motor victimization 3 section windings solely is termed a 2-pole induction motor.
If six windings displaced from each other by 60° area unit used, as shown in Figure twenty two.3(a), by drawing the present and resultant magnetic field diagrams at numerous time values,
it should be shown that one cycle of the provision current to the mechanical device windings causes the magnetic field to maneuver through 0.5 a revolution. the present distribution within the mechanical device windings area unit shown in Figure twenty two.3(a), for the time t shown in Figure twenty two.3(b).
It is seen that for 6 windings on the mechanical device, the magnetic flux made is that the same as that made by rotating 2 magnet north poles and 2 magnet south poles at synchronous speed. this is often referred to as a 4-pole system And an induction motor victimization six section windings is termed a 4-pole induction motor.
By increasing variety|the amount|the quantity} of section windings the quantity of poles is multiplied to any even number.
In general, if f is that the frequency of the currents within the mechanical device windings and therefore the mechanical device is wound to be appreciate p pairs of poles, the speed of revolution of the rotating magnetic field, i.e., the synchronous speed, ns is given by:
Synchronous Speed
Reviewed by I will write articles or blogs containing 500 words for you.....
on
April 11, 2019
Rating:
Reviewed by I will write articles or blogs containing 500 words for you.....
on
April 11, 2019
Rating:
No comments: