Actuator device for actively reducing, damping and/or absorbing vibrations

Patent metadata

Field	Value
Publication number	US-12366280-B2
Application number	US-202017609872-A
Country	US
Kind code	B2
Filing date	May 8, 2020
Priority date	May 10, 2019
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

An actuator device for active reduction, damping and/or absorption of vibrations, in particular of vibrations generated by an external device, includes at least one movably supported armature element and at least one permanent magnet, which is coupled with the armature element, in particular an outer side of the armature element, and which extends around the armature element at least section-wise, in particular in a ring shape,
wherein at least in an axial direction of the armature element, which runs at least substantially parallel to a main movement axis of the armature element, the permanent magnet is encapsulated by the armature element, in particular at least on two sides.

First claim

The invention claimed is:

1. An actuator device for active reduction, damping and/or absorption of vibrations, with at least one movably supported armature element and with at least one permanent magnet and at least one further permanent magnet, which are coupled with the at least one armature element, and which extend around the at least one armature element at least section-wise, wherein at least in an axial direction of the at least one armature element, which runs at least substantially parallel to a main movement axis of the at least one armature element, the at least one permanent magnet and the at least one further permanent magnet are encapsulated by the at least one armature element, wherein the at least one armature element has a hollow space in its interior, wherein the hollow space in the interior of the at least one armature element comprises an inner wall, wherein the hollow space has on the inner wall a first recess and a second recess, wherein respectively one of the first recess and the second recess of the inner wall of the at least one armature element is arranged along the axial direction of the at least one armature element, centrally and on a level with the at least one permanent magnet and/or with the at least one further permanent magnet,
further comprising at least two magnet coils, whose coil windings extend around the at least one armature element in a circumferential direction of the at least one armature element, and
at least one magnet yoke which is, viewed in the axial direction of the at least one armature element, arranged between the at least two magnet coils.

2. The actuator device according to claim 1 , wherein in a radial direction of the at least one armature element, the at least one permanent magnet forms a surface of the at least one armature element.

3. The actuator device according to claim 1 , wherein the at least one permanent magnet is magnetized radially.

4. The actuator device according to claim 1 , wherein the at least one further permanent magnet, —except for a radial magnetization that is inverse with respect to the at least one permanent magnet—is implemented at least substantially identically to the at least one permanent magnet.

5. The actuator device according to claim 1 , further comprising at least one further magnet yoke which is, viewed in the axial direction of the at least one armature element, arranged above or below the at least two magnet coils.

6. The actuator device at least according to claim 5 , wherein the at least one further permanent magnet—except for a radial magnetization that is inverse with respect to the at least one permanent magnet—is implemented at least substantially identically to the at least one permanent magnet, and wherein in at least one operation state, the at least one permanent and the at least one further permanent magnet are arranged relative to the at least one magnet yoke and the at least one further magnet yoke in such a way that, viewed along the axial direction of the at least one armature element, a transition from a north pole of one of the at least one permanent magnet and the at least one further permanent magnet to a south pole of the other one of the at least one permanent magnet and the at least one further permanent magnet and/or a transition from a magnet pole of the one of the at least one permanent magnet and the at least one further permanent magnet to a part of the at least one armature element that forms the encapsulation are/is arranged on a level with the respective nearest magnet yoke of the at least one magnet yoke and the at least one further magnet yoke.

7. The actuator device according to claim 6 , wherein the transition from the magnet pole of the one of the at least one permanent magnet and the at least one further permanent magnet to one of the parts of the at least one armature element forming the encapsulation is arranged offset relative to a center of the nearest magnet yoke of the at least one magnet yoke and the at least one further magnet yoke in the axial direction of the at least one armature element.

8. The actuator device at least according to claim 1 , wherein the at least one permanent magnet is arranged in the at least one armature element in such a way that, on an end of the at least one permanent magnet that is situated outside in the axial direction of the at least one armature element, the magnetic field lines of a magnet pole of the at least one permanent magnet that is situated inside in the radial direction of the at least one armature element are guided back, through a material of a part of the at least one armature element that forms the encapsulation, outwards to the at least one magnet yoke.

9. The actuator device according to claim 1 , wherein relative to the part of the at least one armature element that forms the encapsulation, the at least one permanent magnet is offset inwards toward a center of the at least one armature element in a radial direction of the at least one armature element.

10. The actuator device according to claim 1 , wherein the at least one armature element comprises a receiving region, which is configured to accommodate at least the at least one permanent magnet, the receiving region having radially offset elevations.

11. The actuator device according to claim 1 , wherein the first recess and/or the second recess of the inner wall of the at least one armature element comprises at least one side wall, which is angled relative to the axial direction of the at least one armature element and/or relative to a radial direction of the at least one armature element.

12. The actuator device according to claim 1 , further comprising at least one spring element, which is configured for a radial support of the at least one armature element.

13. The actuator device according to claim 1 , further comprising at least one abutment element, which is configured to delimit a movement of the at least one armature element along the axial direction.

14. The actuator device according to claim 13 , further comprising at least one damper element, which is configured to damp an abutment of the at least one armature element on the at least one abutment element.

15. A magnetic actuator with an actuator device for active reduction, damping and/or absorption of vibrations according to claim 1 .

16. A vibration-damped engine mount with a magnetic actuator according to claim 15 .

17. The actuator device according to claim 1 , wherein the at least one permanent magnet and the at least one further permanent magnet are encapsulated by the at least one armature element on two sides or on three sides of the at least one permanent magnet and the at least one further permanent magnet.

18. The actuator device according to claim 1 , wherein the at least one permanent magnet and/or the at least one further permanent magnet extends around the at least one armature element in a ring shape.

19. An actuator device for active reduction, damping and/or absorption of vibrations, with at least one movably supported armature element and with at least one permanent magnet and at least one further permanent magnet, which are coupled with the at least one armature element, and which extend around the at least one armature element at least section-wise, wherein at least in an axial direction of the at least one armature element, which runs at least substantially parallel to a main movement axis of the at least one armature element, the at least one permanent magnet and the at least one further permanent magnet are encapsulated by the at least one a

Assignees

• Eto Magnetic Gmbh

Inventors

• Fangauer Philipp
• Vincon Peter

Classifications

• H01F2007/1692

  Electromagnets or actuators with two coils · CPC title

• H01F2007/086

  Structural details of the armature · CPC title

• H01F7/1615 Primary

  Armatures or stationary parts of magnetic circuit having permanent magnet · CPC title

• H01F7/081

  Magnetic constructions · CPC title

• F16F2228/066

  Variable stiffness · CPC title