What is a 4-pole 3 phase motor?

With a 4-pole machine, the rotor will move from 1 pole pair to the next in 1 AC supply cycle, so will do half a rev in one supply cycle – the synchronous speed is therefore 50/2 revs per second, or 1500 rpm. A 4-pole induction motor will have a nominal speed of 1450 rpm or thereabouts.

What is slot and pole?

The pole represents the number of permanent magnet poles for the rotating rotor, and a motor with one pair of N pole/S poles is called a two-pole motor. The number of poles can be 2, 4, 6, 8,…, etc. A slot represents the number of coils of fixed stators. Three-phase motor has a multiple of 3 slots.

What is slot in winding?

Definition of slot winding : a winding in which the wires are run in deep grooves (as in armatures of dynamos and motors)

How does a 3 phase 4-pole induction motor work?

The working of the three-phase induction motor is based on the principle of electromagnetic induction. When three-phase stator winding of an induction motor is energized from a 3 phase supply, a rotating magnetic field is set up which rotates around the stator at synchronous speed (Ns).

What phase is a 4 pole motor?

3-phase
The 3-phase 4-pole (per phase) synchronous motor will rotate at 1800 rpm with 60 Hz power or 1500 rpm with 50 Hz power. If the coils are energized one at a time in the sequence φ-1, φ-2, φ-3, the rotor should point to the corresponding poles in turn.

How are slots per pole calculated?

4.6

1. Total number of coils per phase per pole = (Total number of coils / Number of phases)/ (number of poles)
2. ∴ Total number of coils per phase per pole =
3. Slots per phase per pole = (Number of slots)/(No.
4. The number of slots per pole per phase determines how the winding layout is arranged.

What is pole pitch?

Definition of pole pitch : the distance measured on the circumference of the armature from the center of one pole to the center of the next pole : 180 electrical degrees — compare coil, pitch sense 2b(5)

What is slot angle?

Slotted angle (also sometimes referred to as slotted angle iron) is a system of reusable metal strips used to construct shelving, frames, work benches, equipment stands and other structures.

How many windings does a 3-phase motor have?

three sets
The most basic 3-phase induction motor has three sets of windings, with each phase connected to a differ- ent set of windings, Figure 16-4. The current in each winding is 120 electrical degrees out of phase with the urrent in the other windings.

What is rotor in 3-phase induction motor?

In a three-phase induction machine, alternating current supplied to the stator windings energizes it to create a rotating magnetic flux. The rotor circuit is shorted and current flows in the rotor conductors. The action of the rotating flux and the current produces a force that generates a torque to start the motor.