What is a 4-pole 3 phase motor?
Table of Contents
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
- Total number of coils per phase per pole = (Total number of coils / Number of phases)/ (number of poles)
- ∴ Total number of coils per phase per pole =
- Slots per phase per pole = (Number of slots)/(No.
- 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.