Patent ID: 8022587

Claim:
An electrical machine, comprising: a first active part for attachment of at least one electromagnet and at least one permanent magnet; and a second active part interacting magnetically with the first active part and having a first section and a second section, wherein the first and second sections do not overlap, the first section having a first plurality of pole teeth, each pole tooth of the first section having an average width that is different from a width of the nearest pole tooth, wherein the first plurality of pole teeth of the first section are spaced apart nonuniformly with respect to one another along a travel direction of the electrical machine, with a gap between a pole tooth and an adjacent pole tooth on one side of the pole tooth being different from a gap between the pole tooth and an adjacent pole tooth on another side of the pole tooth for all pole teeth of the first section, the second section having a second plurality of pole teeth which are spaced apart uniformly along the travel direction, with the second plurality of pole teeth spaced apart uniformly in the travel direction, each pole tooth of the second section having an average width identical to the width of an adjacent pole tooth, wherein the width of a pole tooth is averaged perpendicular to the travel direction.