Linear actuator
AssigneeRAPA Automotive GmbH & Co. KG
InventorsMarkus Franz, Werner Döhla, Martin Virow
Life of this patent
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Abstract
A linear actuator for an active motor mount of a motor vehicle includes a stator which has an electrically energizable coil for generating an electromagnetic field, as well as a magnetic armature which is mounted axially movable with regard to a longitudinal axis of the coil and has at least one permanent magnet ring which opposes the stator and has several permanent magnet ring segments. Between a surface of the permanent magnet ring segments which faces the stator and a surface of the stator which faces the permanent magnet ring segments there exists an angular gap with a gap angle (α) of preferably 4°.
Claims14
A linear actuator, comprising:
- a stator which has an electrically energizable coil for generating an electromagnetic field, as well as a magnetic armature which is mounted axially movable with regard to a longitudinal axis of the coil and has at least one permanent magnet ring which opposes the stator and has several permanent magnet ring segments, wherein between a surface of the permanent magnet ring segments which faces the stator and a surface of the stator which faces the permanent magnet ring segments there exists an angular gap such that a radial distance between the surface of the permanent magnet ring segments which faces the stator and the surface of the stator which faces the permanent ring segments increases in the direction of the longitudinal axis.
Dependencies are inferred from the claim text.