Electrical machine with magnetic flux intensifier

摘要

An electrical machine has a stator-rotor configuration in which the rotor has at least two poles. The poles are configured to rotate in an angle and to electromagnetically interact with one or more teeth that is a part of a stator adjoined in a fixed position to the electrical machine. The configuration forms a gap in the lateral direction between the poles and the teeth. At least one of the poles is formed of a permanent magnet material and a magnetic flux intensifier is arranged relative to at least one of the poles and one of the teeth. The magnetic flux intensifier is configured to concentrate the magnetic field lines between a pole and the teeth.

主权项

1. An electrical machine, comprising:
a rotor configured to rotate in a direction relative to a stator, where the rotor comprises one or more poles configured to rotate in an angle relative to a center of the rotor, where the one or more poles are configured to interact with one or more teeth in the stator via an electromagnetic field; wherein the stator is configured to be fixed in a stationary position in the electrical machine, where a gap is provided between the one or more teeth and the one or more poles in a lateral direction; wherein at least one magnetic flux intensifier is arranged relative to at least one of the one or more poles and at least one of the one or more teeth, where the magnetic flux intensifier is configured to concentrate magnetic field lines between said at least one of the one or more poles and said at least one of the one or more teeth during rotation of the rotor, wherein the magnetic flux intensifier comprises a first type layer of a high energy magnetic material with magnetic field lines oriented essentially laterally, and at least a second type layer of a second magnetic material having a magnetic strength that is lower than that of the high energy magnetic material, and wherein the first type layer is located between two second type layers, and wherein the magnetic flux intensifier comprises a predetermined number of successive additional first and second type layers around a central layer defined by the first type layer, wherein a first successive type layer of a high energy magnetic material is located against a second successive type layer of a second magnetic material having magnetic properties that differ from the properties of the high energy magnetic material, and wherein at least one third type layer is located at opposite sides of the successive additional first and second type layers.