Article | REF: D3420 V1

Winding of AC rotating machines

Author: Jacques SAINT-MICHEL

Publication date: February 10, 2001, Review date: July 12, 2022 | Lire en français

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1. Magnetic field generated by a winding

Let's consider the magnetic circuit of a bipolar machine, with 18 stator slots and a smooth rotor. The air gap e is assumed to be very small compared with the pole pitch : $e ≪ π R$

R is the average air gap radius; the notch opening, of the same order of magnitude as the air gap, is small compared with the tooth pitch, so that these openings do not locally disturb the field.

1.1 Case of a single turn

First, let's consider the case of a single coil housed in two diametrically opposed slots, in our case slots 1 and 10, for example. A current i flows through it, creating a magnetic field that...

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