Non-contacting “snubber bearing” for passive magnetic bearing systems
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H02K-007/09
F16C-032/04
F16C-015/00
출원번호
US-0556029
(2014-11-28)
등록번호
US-9739307
(2017-08-22)
발명자
/ 주소
Post, Richard F
출원인 / 주소
Lawrence Livermore National Security, LLC
대리인 / 주소
Wooldridge, John P.
인용정보
피인용 횟수 :
0인용 특허 :
12
초록▼
A new non-contacting magnetic “snubber” bearing is provided for application to rotating systems such as vehicular electromechanical battery systems subject to frequent accelerations. The design is such that in the equilibrium position the drag force of the snubber is very small (milliwatts). However
A new non-contacting magnetic “snubber” bearing is provided for application to rotating systems such as vehicular electromechanical battery systems subject to frequent accelerations. The design is such that in the equilibrium position the drag force of the snubber is very small (milliwatts). However in a typical case, if the rotor is displaced by as little as 2 millimeters a large restoring force is generated without any physical contact between the stationary and rotating parts of the snubber bearing.
대표청구항▼
1. An apparatus, comprising: a rotor;a stationary support structure;a first plurality of (Halbach) HB arrays attached to only one of said rotor or said stationary support structure; anda first array of closed circuits attached to only the one of said rotor or said stationary support structure to whi
1. An apparatus, comprising: a rotor;a stationary support structure;a first plurality of (Halbach) HB arrays attached to only one of said rotor or said stationary support structure; anda first array of closed circuits attached to only the one of said rotor or said stationary support structure to which said first plurality of HB arrays is not attached, wherein said first plurality of HB arrays and said first array of closed circuits face each other and are separated by a gap, wherein said gap is characterized by a first boundary next to said plurality of HB arrays and a second boundary next to said array of closed circuits, wherein only one of said first boundary or said second boundary is circular and only the other of said first boundary or said second boundary is elliptical, wherein each Halbach array of said first plurality of HB arrays has a wavelength that is less than said gap, selected to produce, when said rotor is rotating, repelling forces that increase exponentially when said first plurality of HB arrays is displaced laterally with respect to said first array of closed circuits. 2. The apparatus of claim 1, wherein said first array of closed circuits is attached to said stationary support structure and forms a first elliptical cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor is a hollow circular cylinder having a rotational axis, wherein said first plurality of HB arrays are attached to the inside surface of said cylinder and form a first cylindrical HB array that is centered on said rotational axis, wherein said first boundary is circular and said second boundary is elliptical, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 3. The apparatus of claim 1, wherein said first array of closed circuits is attached to said stationary support structure and forms a first elliptical cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first plurality of HB arrays are attached to the outside surface of said rotor and forms a first cylindrical HB array that is centered on said rotational axis, wherein said first boundary is circular and said second boundary is elliptical, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 4. The apparatus of claim 1, wherein said first plurality of HB arrays is attached to said stationary support structure and forms a first elliptical cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first array of closed circuits is attached to the inside surface of said rotor and is centered on said rotational axis, wherein said first boundary is elliptical and said second boundary is circular, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 5. The apparatus of claim 1, wherein said first plurality of HB arrays is attached to said stationary support structure and forms a first elliptical cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first array of closed circuits is attached to the outside surface of said rotor and is centered on said rotational axis, wherein said first boundary is elliptical and said second boundary is circular, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 6. The apparatus of claim 1, wherein said first array of closed circuits is attached to said stationary support structure and forms a first cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first plurality of HB arrays is attached to the inside surface of said rotor and forms a first elliptical cylinder about said rotational axis, wherein said first boundary is elliptical and said second boundary is circular, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 7. The apparatus of claim 1, wherein said first array of closed circuits is attached to said stationary support structure and forms a first circular cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first plurality of HB arrays is attached to the outside surface of said rotor and forms an elliptical cylinder about said rotational axis, wherein said first boundary is elliptical and said second boundary is circular, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 8. The apparatus of claim 1, wherein said first plurality of HB arrays is attached to said stationary support structure and forms a first circular cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first array of closed circuits is attached to the inside surface of said rotor and form a first elliptical cylinder about said rotational axis, wherein said first boundary is circular and said second boundary is elliptical, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 9. The apparatus of claim 1, wherein said first plurality of HB arrays is attached to said stationary support structure and forms a first circular cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first array of closed circuits are attached to the outside surface of said rotor and form a first elliptical cylinder that rotates about said rotational axis, wherein said first boundary is circular and said second boundary is elliptical, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 10. The apparatus of claim 1, wherein said rotor comprises a conical shape. 11. A method, comprising: providing the apparatus of claim 1, androtating said rotor. 12. The method of claim 11, wherein said first array of closed circuits is attached to said stationary support structure and forms a first elliptical cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor is a hollow circular cylinder having a rotational axis, wherein said first plurality of HB arrays are attached to the inside surface of said cylinder and form a first cylindrical HB array that is centered on said rotational axis, wherein said first boundary is circular and said second boundary is elliptical, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 13. The method of claim 11, wherein said first array of closed circuits is attached to said stationary support structure and forms a first elliptical cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first plurality of HB arrays are attached to the outside surface of said rotor and forms a first cylindrical HB array that is centered on said rotational axis, wherein said first boundary is circular and said second boundary is elliptical, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 14. The method of claim 11, wherein said first plurality of HB arrays is attached to said stationary support structure and forms a first elliptical cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first array of closed circuits is attached to the inside surface of said rotor and is centered on said rotational axis, wherein said first boundary is elliptical and said second boundary is circular, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 15. The method of claim 11, wherein said first plurality of HB arrays is attached to said stationary support structure and forms a first elliptical cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first array of closed circuits is attached to the outside surface of said rotor and is centered on said rotational axis, wherein said first boundary is elliptical and said second boundary is circular, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 16. The method of claim 11, wherein said first array of closed circuits is attached to said stationary support structure and forms a first cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first plurality of HB arrays is attached to the inside surface of said rotor and forms a first elliptical cylinder about said rotational axis, wherein said first boundary is elliptical and said second boundary is circular, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 17. The method of claim 11, wherein said first array of closed circuits is attached to said stationary support structure and forms a first circular cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first plurality of HB arrays is attached to the outside surface of said rotor and forms an elliptical cylinder about said rotational axis, wherein said first boundary is elliptical and said second boundary is circular, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 18. The method of claim 11, wherein said first plurality of HB arrays is attached to said stationary support structure and forms a first circular cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first array of closed circuits is attached to the inside surface of said rotor and form a first elliptical cylinder about said rotational axis, wherein said first boundary is circular and said second boundary is elliptical, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 19. The method of claim 11, wherein said first plurality of HB arrays is attached to said stationary support structure and forms a first circular cylinder having a longitudinal axis about which said rotor will rotate in stable equilibrium, wherein said rotor has a rotational axis, wherein said first array of closed circuits are attached to the outside surface of said rotor and form a first elliptical cylinder that rotates about said rotational axis, wherein said first boundary is circular and said second boundary is elliptical, wherein when said rotor rotates in stable equilibrium, said rotational axis is coaxial with said longitudinal axis. 20. The method of claim 11, wherein said rotor comprises a conical shape. 21. An apparatus, comprising: a rotor;a stationary support structure;a first plurality of (Halbach) HB arrays attached to only one of said rotor or said stationary support structure; anda first array of closed circuits attached to only the one of said rotor or said stationary support structure to which said first plurality of HB arrays is not attached, wherein said first plurality of HB arrays and said first array of closed circuits face each other and are separated by a gap, wherein said gap is characterized by a first boundary next to said first plurality of HB arrays and a second boundary next to said first array of closed circuits, wherein only one of said first boundary or said second boundary is circular and only the other of said first boundary or said second boundary is elliptical. 22. The apparatus of claim 21, wherein each HB array of said plurality of HB arrays comprises a wavelength selected to provide negligible repelling force against said first array of closed circuits when said rotor is rotating in stable equilibrium but rises to a high value when said rotor is not rotating in stable equilibrium. 23. The apparatus of claim 22, wherein each HB array of said plurality of HB arrays comprises a wavelength selected to provide a desired repelling force against said first array of closed circuits only when said rotor is not rotating in stable equilibrium, wherein said desired repelling force is sufficient to return said rotor to stable equilibrium while said rotor is rotating.
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이 특허에 인용된 특허 (12)
Post Richard F., Combined passive bearing element/generator motor.
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