May 30, 2018 · The number of rotor poles must always match the number of stator poles. For most other types of motors, the rotor is constructed so that the number of rotor poles matches the number of stator poles. In induction motors, the slip at the rated frequency and load is between about 1.5% and 3% of synchronous speed for "standard" motors.

This works and stator poles = rotor poles (but both having a N, S, N, S sequence. Then, consider what happens when you put a 4 pole rotor into a stator with 6 poles - in no way can all the norths on the four rotor poles line up with all the souths produced at any instant by the stator. This is because there is a physical angle misalignment.

Jun 17, 2016 · So the more poles you have, the more cycles it take to complete a full revolution. In general, torque is a function of current. But it's more complex in an induction motor, as torque is also a function of the relative angle between the magnetic flux in the rotor and stator (slippage).

Feb 12, 2018 · The apparent construction is then a doubly-salient permanent-magnet motor (DSPM motor). A DPSM motor can have different numbers of poles on the stator and rotor. The stator could have 12 poles with the phases distributed alternately among the poles. It could also have 6 or 4 poles with 2 or 3 phases making up each phase.

Sep 11, 2020 · To the degree that the stator and rotor poles have saliency, the method that you used should correctly determine the number of poles. If the stator windings are distributed in slots to provide a more sinusoidal waveform and to make a three-phase machine, the stator will have less saliency and the saliency will tend to indicate the number of ...

Apr 21, 2021 · The number of poles is not determined by the number of slots. The formula P=2n is more like a determination of the maximum number of poles that should be wound with a a stator having a given number of slots. The number of poles is determined by the distribution of the windings. There are many ways to distribute the windings.

Mar 26, 2016 · Because a magnet field has two poles N and S, or one pole pair. The poles number can therefore be just a number 2*N. And it is not poles per phase, but rather poles (or pole pairs). For example you have a two pole motor, or a motor with one pole pair, which is the same. The synchronous speed of a induction motor is N=f/(60*N_of_pole_pairs).

There will be ahuge no. of poles. The rotor may be a PCB consisiting of tracks emanating from the centre of the rotor disc towards the outer periphery -like the spokes in a bi-cycle wheel- the overhang portion can be minimised if there are a huge no. of stator poles. (You can look at the image by Googling PCB motor).

Aug 28, 2015 · When an electrical machine is operating as a motor, the idea is to create a traveling, rotating magnetic field, via the stator and "hope" 1 that this moving flux attracts the rotor (be it via an equivalent magnetic field or via an affinity to reduce the reluctance) So a stator: A 3 phase, single pole pair topology. If the stator was now unrolled

It has 18 stator windings (3 phase -> 3 pole pairs per phase) and 16 poles on the rotor. What are possible reasons for this design? Why is a lower pole count on the rotor beneficial? Is my assumption correct that the ratio between electrical and mechanical revolutions is given by the rotor pole count?