| 摘要 |
A multipolar step motor having a rotor with N pairs of alternatively positive and negative magnetic poles arranged thereon with a regular angular spacing therebetween. The motor has two polar members defining an air gap within which the rotor is disposed, at least one of the polar members being configured to define N alternations of the distance between the said member and the rotor. The elements defining the said alternations comprise two groups in which the elements are equally spaced by 2 pi /N, the two groups being angularly spaced by an angle of pi /4N one with respect to the other.
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