Electric machine
AssigneeSchaeffler Technologies AG & Co. KG
InventorsMartin Häßler, Alain Rusch, Miriam Axtmann, Michael Kessler
Life of this patent
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Abstract
An electric machine has a stator and a rotor which is separated from the stator by an air gap. The rotor has at least one first rotor body, which has a first group of permanent magnets, and at least one second rotor body, which is arranged at an axial distance from the first rotor body) and has a second group of permanent magnets. A rotor shaft is coupled to the first rotor body and the second rotor coaxially within the first rotor body and the second rotor body so as to transmit a torque. At least the first rotor body is mounted on the rotor shaft so as to be rotatable relative to the second rotor body against the effect of a first torsional stiffness by means of a mechanical field-attenuation mechanism.
Claims11
An electric machine, comprising:
- a stator and a rotor separated from the stator by an air gap, the rotor comprising at least a first rotor body having a first group of permanent magnets and at least one second rotor body axially spaced apart from the first rotor body having a second group of permanent magnets, and a rotor shaft being coupled coaxially within the first rotor body and the second rotor body in a torque-transmitting manner to the first rotor body and the second rotor body, at least the first rotor body being rotatably mounted on the rotor shaft by a mechanical field-attenuation mechanism against an effect of a first torsional stiffness relative to the second rotor body, wherein:
- contours of a lever element in contact with lever contact sections are designed such that in each operating position of the mechanical field-attenuation mechanism over its entire movement path in sections perpendicular to an axis of rotation of the rotor, all contact points between rotor bodies and the lever element are arranged on a straight connecting line between a tilting axis of the lever element and the rotational axis of the rotor.
Dependencies are inferred from the claim text.