How are the poles and pitches in the concentric windings?

Concentric windings refer to one of the design techniques used in constructing electrical machines, such as motors and generators. In these windings, different coils are placed concentrically around the same magnetic core, typically to create different phases or to accommodate different power levels within the same device. The terms “poles” and “pitches” are central to understanding how concentric windings are laid out and their functioning. Here is a more detailed look at both:

### Poles:

– Definition: In the context of electrical machines, poles refer to pairs of north and south magnetic poles generated either by a permanent magnet or by electromagnetic windings.

– Concentric Windings and Poles: The number of poles in an electrical machine determines its speed and frequency. Machines with more poles run at slower speeds for a given frequency. In concentric windings, the arrangement and number of coils must take the desired number of poles into account to create the intended magnetic fields. Essentially, the windings need to be laid out such that they can produce the magnetic pole distribution required for the machine’s operation.

### Pitches:

– Definition: Pitch, in the context of electrical windings, usually refers to the coil span, or the distance (expressed in terms of the angular or physical distance) between the coils that form the sides of an electrical winding or between the ends of a single coil.

– Concentric Windings and Pitches: The pitch is critical for determining