Linear drive device provided with an armature body having a magnet carrier
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02K-033/16
F04B-017/04
출원번호
UP-0591082
(2005-03-03)
등록번호
US-7686597
(2010-04-23)
우선권정보
DE-10 2004 010 404(2004-03-03)
국제출원번호
PCT/EP2005/050956
(2005-03-03)
§371/§102 date
20060829
(20060829)
국제공개번호
WO05/086326
(2005-09-15)
발명자
/ 주소
Ries, Guenter
출원인 / 주소
BSH Bosch und Siemens Hausgeraete GmbH
대리인 / 주소
Howard, James E.
인용정보
피인용 횟수 :
3인용 특허 :
2
초록▼
A linear drive device comprising at least one excitation winding for producing a variable magnetic field and is provided with an associated yoke body conducting a magnetic flux and an armature body which comprises a magnet carrier provided with at least two permanent magnet parts, preferably in the
A linear drive device comprising at least one excitation winding for producing a variable magnetic field and is provided with an associated yoke body conducting a magnetic flux and an armature body which comprises a magnet carrier provided with at least two permanent magnet parts, preferably in the form of a plate, and to which an axial oscillation movement can be transferred by the magnetic field of the excitation winding. In order to avoid eddy currents in the magnet carrier, it is made of an electrically insulating material at least in the part thereof which penetrates into the magnetic field area defined by the pole surfaces of the yoke body and the excitation winding or which are arranged in said area. The magnet parts can be provided with ferromagnetic covers.
대표청구항▼
The invention claimed is: 1. A linear drive device comprising: an excitation winding producing a variable magnetic field and including an associated magnetic-flux-carrying yoke body having pole surfaces; and an armature body including a magnet carrier having at least two permanent magnet parts and
The invention claimed is: 1. A linear drive device comprising: an excitation winding producing a variable magnetic field and including an associated magnetic-flux-carrying yoke body having pole surfaces; and an armature body including a magnet carrier having at least two permanent magnet parts and an axial oscillation movement being transferable to the at least two permanent magnet parts by the variable magnetic field of the excitation winding, the magnet carrier including an electrically conductive exterior frame and electrically insulating material mounted inside the exterior frame and holding the two permanent magnet parts on the exterior frame, wherein during axial oscillation movements of armature body, the exterior frame remains substantially outside the magnetic field area defined by the pole surfaces of the yoke body and the excitation winding to thereby substantially avoid an induction of eddy currents adjacent the pole surfaces of the yoke body. 2. The device according to claim 1, wherein the magnet carrier includes a metal material forming the exterior frame, and wherein the parts of the magnet carrier which extend into the magnetic field area of the yoke body and the excitation winding exclude the exterior frame. 3. The device according to claim 1, wherein each magnet part with respect to the associated yoke body and the excitation winding is covered by a magnet cover made of a ferromagnetic layer, a spacing joint axially spacing apart the magnet covers. 4. The device according to claim 3, wherein the ferromagnetic magnet covers are spaced apart from one another by a distance a>2 s, where s is the distance of the magnet covers from the respective pole surface of the associated yoke body. 5. The device according to claim 3, wherein each magnet cover covers a larger area than the respectively associated magnet part. 6. The device according to claim 3, wherein the magnet covers include an Fe—Si alloy. 7. The device according to claim 3, wherein the magnet covers each have a thickness between 0.2 mm and 1.5 mm. 8. The device according to claim 7, wherein the magnet covers each have a thickness between 0.35 and 1 mm. 9. The device according to claim 1, wherein the magnet parts are embodied as plate- or sheet-shaped. 10. The device according to claim 1, further comprising a plane of symmetry and the device being constructed symmetrically with respect to the plane of symmetry. 11. The device according to claim 1, wherein the armature body is rigidly connected to a pump plunger of a compressor. 12. The device according to claim 1, wherein side edges of the magnet parts abut one another. 13. The device according to claim 12, further comprising a plurality of magnet covers made of a ferromagnetic layer, wherein each magnet cover is mounted on a surface of a magnet part such that the magnet cover is positioned between the magnet part and an adjacent yoke body, and wherein the side edges of adjacent magnet covers are spaced apart from one another. 14. The device of claim 1, wherein the yoke body comprises an E-shaped frame with the excitation winding mounted around a center leg of the E-shaped frame. 15. The device of claim 1, wherein the excitation winding comprises a first excitation winding mounted on a first yoke body and a second excitation winding mounted on a second yoke body, wherein pole surfaces of the first and second yoke bodies face each other across an air gap, and wherein the armature body is positioned in the air gap between the first and second yoke bodies. 16. The device of claim 15, wherein the device is symmetrical about a plane of symmetry passing through a center of the air gap. 17. A linear drive device comprising: an excitation winding producing a variable magnetic field having a longitudinal extent along a longitudinal axis, the excitation winding including an associated magnetic-flux-carrying yoke body having a pair of pole surfaces axially spaced from one another relative to the longitudinal axis; and an armature body including a magnet carrier having a plurality of permanent magnet parts, an electrically conductive exterior frame, and a pair of electrically insulating portions that hold the permanent magnet parts in a central portion of the exterior frame, the armature body being movable in an axial oscillation movement under the control of the variable magnetic field of the excitation winding, the pair of electrically insulating portions being axially spaced from one another relative to the longitudinal axis and at least one of the plurality of permanent magnet parts being disposed axially intermediate the pair of electrically insulating portions, and wherein during the axial oscillation movement each one of the pair of electrically insulating portions is disposed to at least partially extend into a respective magnetic field area defined by a respective one of the pair of pole surfaces of the yoke body and the excitation winding while the exterior frame remains outside the magnetic field area. 18. The device according to claim 17, wherein the exterior frame of the magnet carrier includes a metal material and wherein the parts of the magnet carrier which extend into the magnetic field area of the yoke body and the excitation winding comprise the plurality of permanent magnet parts and the pair of electrically insulating portions. 19. The device according to claim 17, wherein each magnet part is covered by a magnet cover made of a ferromagnetic layer, a spacing joint axially spacing apart side edges of adjacent magnet covers. 20. The device according to claim 19, wherein the ferromagnetic magnet covers are spaced apart from one another by a distance a>2 s, where s is the distance of the magnet covers from the respective pole surface of the associated yoke body. 21. The device according to claim 19, wherein the magnet covers include an Fe—Si alloy. 22. The device according to claim 19, wherein the magnet covers each have a thickness between 0.2 mm and 1.5 mm or a thickness between 0.35 and 1 mm. 23. The device according to claim 19, wherein side edges of adjacent permanent magnet parts abut one another. 24. The device according to claim 17, wherein the armature body is rigidly connected to a pump plunger of a compressor. 25. The device of claim 17, wherein the yoke body comprises an E-shaped frame with the excitation winding mounted around a center leg of the E-shaped frame. 26. The device of claim 17, wherein the excitation winding comprises a first excitation winding mounted on a first yoke body and a second excitation winding mounted on a second yoke body, wherein pole surfaces of the first and second yoke bodies face each other across an air gap, and wherein the armature body is positioned in the air gap between the first and second yoke bodies. 27. The device of claim 26, wherein the device is symmetrical about a plane of symmetry passing through a center of the air gap.
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이 특허에 인용된 특허 (2)
Unger Reuven (Athens OH), Magnet support sleeve for linear electromechanical transducer.
Lake, Gary; May, Michael J.; Ranjan, Priyesh; Murray, Douglas; Rainone, Michael; Sackett, Samuel; Presley, Talbot, Permanent magnet linear motor actuated safety valve and method.
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