IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0864827
(2004-06-09)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- Astronautics Corporation of America
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
32 인용 특허 :
69 |
초록
▼
A permanent magnet assembly is disclosed that utilizes at least two rotating magnet subassemblies, and first and second stationary magnet subassemblies arranged so that their magnetic vectors oppose each other. At a first rotational position of the rotating magnet subassemblies, the magnetic vectors
A permanent magnet assembly is disclosed that utilizes at least two rotating magnet subassemblies, and first and second stationary magnet subassemblies arranged so that their magnetic vectors oppose each other. At a first rotational position of the rotating magnet subassemblies, the magnetic vectors of the rotating magnet subassemblies align with the magnetic vector of the first stationary magnet subassembly and oppose the magnetic vector of the second stationary magnet subassembly. At a second rotational position, the magnetic vectors of the rotating magnet subassemblies are reversed, thereby aligning with the magnetic vector of the second stationary magnet subassembly and opposing the magnetic vector of the first stationary magnet subassembly. By locating air gap portions where the magnetic vectors of the rotating magnetic subassemblies meet the magnetic vectors of the stationary magnetic subassemblies, the air gap portions are subjected to a time-varying magnetic flux density.
대표청구항
▼
What is claimed is: 1. A magnet assembly comprising: a first stationary magnet subassembly and a second stationary magnet subassembly, each stationary magnet subassembly including at least one permanent magnet section having a north end and a south end, a north concave section magnetically coupled
What is claimed is: 1. A magnet assembly comprising: a first stationary magnet subassembly and a second stationary magnet subassembly, each stationary magnet subassembly including at least one permanent magnet section having a north end and a south end, a north concave section magnetically coupled to the north end of the permanent magnet section and including a north pole face, and a south concave section magnetically coupled to the south end of the permanent magnet section and including a south pole face opposite the north pole face in a flux direction across an air gap; a first rotating subassembly adapted to rotate about a first rotational axis to a first plurality of rotational positions and including at least one permanent magnet section having a north end and a south end, a north rounded end cap magnetically coupled to the north end of the permanent magnet section, and a south rounded end cap magnetically coupled to the south end of the permanent magnet section, wherein the rounded end caps of the first rotating subassembly are adapted to intermittently nest with the north concave sections of the first and second stationary magnetic assemblies as the first rotating subassembly rotates, a second rotating subassembly adapted to rotate about a second rotational axis to a second plurality of rotational positions and including a first rounded end cap and a second rounded end cap connected together by a magnetically permeable section, wherein the rounded end caps of the second rotating subassembly are adapted to intermittently nest with the south concave sections of the first and second stationary magnetic assemblies as the second rotating subassembly rotates, wherein when the first rotating subassembly is at a first rotational position and the second rotating subassembly is at a second rotational position, the north rounded end cap of the first rotating subassembly nests with the north concave section of the first stationary magnet subassembly, the south rounded end cap of the first rotating subassembly nests with the north concave section of the second stationary magnet subassembly, the first rounded end cap of the second rotating subassembly nests with the south concave section of the first stationary magnet subassembly, and the second rounded end cap of the second rotating subassembly nests with the south concave section of the second stationary magnet subassembly, whereby the air gap of the first stationary magnet subassembly is subjected to a relatively high magnetic field and the air gap of the second stationary magnet subassembly is subjected to a relatively low magnetic field; and wherein when the first rotating subassembly is at a third rotational position and the second rotating subassembly is at a fourth rotational position, the north rounded end cap of the first rotating subassembly nests with the north concave section of the second stationary magnet subassembly, the south rounded end cap of the first rotating subassembly nests with the north concave section of the first stationary magnet subassembly, the first rounded end cap of the second rotating subassembly nests with the south concave section of the second stationary magnet subassembly, and the second rounded end cap of the second rotating subassembly nests with the south concave section of the first stationary magnet subassembly, whereby the air gap of the second stationary magnet subassembly is subjected to a relatively high magnetic field and the air gap of the first stationary magnet subassembly is subjected to a relatively low magnetic field. 2. The magnet assembly of claim 1 wherein the first rotational axis is substantially normal to the flux direction across the air gap of the first stationary magnet subassembly. 3. The magnet assembly of claim 1 wherein the first rotational axis is substantially parallel to the flux direction across the air gap of the first stationary magnet subassembly. 4. The magnet assembly of claim 1 wherein the first rotational axis is substantially parallel to the second rotational axis, wherein the first rotating subassembly rotates in a first angular direction, and wherein the second rotating subassembly rotates synchronously with the first rotating subassembly in a second angular direction. 5. The magnet assembly of claim 4 wherein the first angular direction is the reverse of the second angular direction, whereby the first rotating subassembly rotates in the opposite direction of the second rotating subassembly. 6. The magnet assembly of claim 1 wherein each stationary magnetic subassembly includes a first permanent magnet section having a north end and a south end, a flux return portion formed of magnetically permeable material and having a first end and a second end, and a second permanent magnet section having a north end and a south end, wherein the north end of the first permanent magnet section is magnetically coupled and connected to the north concave section, wherein the south end of the first permanent magnet section is magnetically coupled and connected to the first end of the flux return portion, wherein the second end of the flux return portion is magnetically coupled and connected to the north end of the second permanent magnet section, and wherein the south end of the second permanent magnet section is magnetically coupled and connected to the south concave section. 7. The magnet assembly of claim 6 wherein the first rotational axis is substantially normal to the flux direction across the air gap of the first stationary magnet subassembly. 8. The magnet assembly of claim 6 wherein the first rotational axis is substantially parallel to the flux direction across the air gap of the first stationary magnet subassembly. 9. The magnet assembly of claim 6 wherein the first rotational axis is substantially parallel to the second rotational axis, wherein the first rotating subassembly rotates in a first angular direction, and wherein the second rotating subassembly rotates synchronously with the first rotating subassembly in a second angular direction. 10. The magnet assembly of claim 9 wherein the first angular direction is the reverse of the second angular direction, whereby the first rotating subassembly rotates in the opposite direction of the second rotating subassembly. 11. A magnet assembly comprising: a first stationary magnet subassembly and a second stationary magnet subassembly, each stationary magnet subassembly including a north concave section with a north pole face, the north concave section magnetically coupled and connected to a south concave section with a south pole face, wherein each stationary magnet subassembly is at least partially permanently magnetized with a magnetic vector from the south concave section to the north concave section, and wherein the north pole face is opposite the south pole face in a flux direction across an air gap; a first rotating subassembly adapted to rotate about a first rotational axis to a first plurality of rotational positions and including a north rounded end cap magnetically coupled and connected to a south rounded end cap, wherein the first rotating subassembly is at least partially permanently magnetized with a magnetic vector from the south rounded end cap to the north rounded end cap, and wherein the rounded end caps of the first rotating subassembly are adapted to intermittently magnetically couple with the north concave sections of the first and second stationary magnetic assemblies as the first rotating subassembly rotates, a second rotating subassembly having a first rounded end cap and a second rounded end cap magnetically coupled and connected to the first rounded end cap, the second rotating subassembly being adapted to rotate about a second rotational axis to a second plurality of rotational positions, wherein the rounded end caps of the second rotating subassembly are adapted to intermittently magnetically couple with the south concave sections of the first and second stationary magnetic assemblies as the second rotating subassembly rotates, wherein when the first rotating subassembly is at a first rotational position and the second rotating subassembly is at a second rotational position, the north rounded end cap of the first rotating subassembly is magnetically coupled to the north concave section of the first stationary magnet subassembly and the south rounded end cap of the first rotating subassembly is magnetically coupled to the north concave section of the second stationary magnet subassembly, whereby the air gap of the first stationary magnet subassembly is subjected to a relatively high magnetic field and the air gap of the second stationary magnet subassembly is subjected to a relatively low magnetic field; and wherein when the first rotating subassembly is at a third rotational position and the second rotating subassembly is at a fourth rotational position, the north rounded end cap of the first rotating subassembly is magnetically coupled to the north concave section of the second stationary magnet subassembly and the south rounded end cap of the first rotating subassembly is magnetically coupled to the north concave section of the first stationary magnet subassembly, whereby the air gap of the second stationary magnet subassembly is subjected to a relatively high magnetic field and the air gap of the first stationary magnet subassembly is subjected to a relatively low magnetic field. 12. The magnet assembly of claim 11 wherein the first rotational axis is substantially normal to the flux direction across the air gap of the first stationary magnet subassembly. 13. The magnet assembly of claim 11 wherein the first rotational axis is substantially parallel to the flux direction across the air gap of the first stationary magnet subassembly. 14. The magnet assembly of claim 11 wherein the first rotational axis is substantially parallel to the second rotational axis, wherein the first rotating subassembly rotates in a first angular direction, and wherein the second rotating subassembly rotates synchronously with the first rotating subassembly in a second angular direction. 15. The magnet assembly of claim 14 wherein the first angular direction is the reverse of the second angular direction, whereby the first rotating subassembly rotates in the opposite direction of the second rotating subassembly. 16. The magnet assembly of claim 11 wherein each stationary magnetic subassembly includes a first permanent magnet section having a north end and a south end, a flux return portion formed of magnetically permeable material and having a first end and a second end, and a second permanent magnet section having a north end and a south end, wherein the north end of the first permanent magnet section is magnetically coupled and connected to the north concave section, wherein the south end of the first permanent magnet section is magnetically coupled and connected to the first end of the flux return portion, wherein the second end of the flux return portion is magnetically coupled and connected to the north end of the second permanent magnet section, and wherein the south end of the second permanent magnet section is magnetically coupled and connected to the south concave section. 17. The magnet assembly of claim 16 wherein the first rotational axis is substantially normal to the flux direction across the air gap of the first stationary magnet subassembly. 18. The magnet assembly of claim 16 wherein the first rotational axis is substantially parallel to the flux direction across the air gap of the first stationary magnet subassembly. 19. The magnet assembly of claim 16 wherein the first rotational axis is substantially parallel to the second rotational axis, wherein the first rotating subassembly rotates in a first angular direction, and wherein the second rotating subassembly rotates synchronously with the first rotating subassembly in a second angular direction. 20. The magnet assembly of claim 19 wherein the first angular direction is the reverse of the second angular direction, whereby the first rotating subassembly rotates in the opposite direction of the second rotating subassembly. 21. A magnet assembly comprising: a first stationary magnet subassembly and a second stationary magnet subassembly, each stationary magnet subassembly including at least one permanent magnet section having a north end and a south end, a north end magnetically coupled and connected to the north end of the permanent magnet section and including a north mating portion and a north pole face, and a south end magnetically coupled and connected to the south end of the permanent magnet section and including a south mating portion and a south pole face opposite the north pole face in a flux direction across an air gap; a first rotating subassembly adapted to rotate about a first rotational axis to a first plurality of rotational positions and including a north end mating portion magnetically coupled and connected to a south end mating portion, wherein the first rotating subassembly is at least partially permanently magnetized with a magnetic vector from the south end mating portion to the north end mating portion, and wherein the end mating portions of the first rotating subassembly are adapted to intermittently magnetically couple with the north mating portions of the first and second stationary magnetic assemblies as the first rotating subassembly rotates, a second movable subassembly including a first end mating portion connected and magnetically coupled to a second end mating portion, the second movable subassembly being movable to a second plurality of positions including a first position wherein the first end mating portion of the second movable subassembly nests with and magnetically couples to the south mating portion of the first stationary magnetic subassembly and the second end mating portion of the second movable subassembly nests with and magnetically couples to the south mating portion of the second stationary magnetic subassembly; wherein when the first rotating subassembly is at a first rotational position in the first plurality of rotational positions and the second movable subassembly is in the first position in the second plurality of positions, the north end mating portion of the first rotating subassembly is magnetically coupled to the north mating portion of the first stationary magnet subassembly, the south end mating portion of the first rotating subassembly is magnetically coupled to the north mating portion of the second stationary magnet subassembly, and the south mating portions of the first and second stationary magnet subassemblies are magnetically coupled through the second movable subassembly, whereby the air gap of the first stationary magnet subassembly is subjected to a relatively high magnetic field and the air gap of the second stationary magnet subassembly is subjected to a relatively low magnetic field. 22. The magnet assembly of claim 21 wherein the first rotational axis is substantially normal to the flux direction across the air gap of the first stationary magnet subassembly. 23. The magnet assembly of claim 21 wherein the first rotational axis is substantially parallel to the flux direction across the air gap of the first stationary magnet subassembly. 24. The magnet assembly of claim 21 wherein each stationary magnetic subassembly includes a first permanent magnet section having a north end and a south end, a flux return portion formed of magnetically permeable material and having a first end and a second end, and a second permanent magnet section having a north end and a south end, wherein the north end of the first permanent magnet section is magnetically coupled and connected to the north mating portion, wherein the south end of the first permanent magnet section is magnetically coupled and connected to the first end of the flux return portion, wherein the second end of the flux return portion is magnetically coupled and connected to the north end of the second permanent magnet section, and wherein the south end of the second permanent magnet section is magnetically coupled and connected to the south mating portion. 25. The magnet assembly of claim 24 wherein the first rotational axis is substantially normal to the flux direction across the air gap of the first stationary magnet subassembly. 26. The magnet assembly of claim 24 wherein the first rotational axis is substantially parallel to the flux direction across the air gap of the first stationary magnet subassembly. 27. The magnet assembly of claim 24 wherein the north mating portion of each stationary magnet subassembly comprises a concave section formed of magnetically permeable material, wherein the first permanent magnet section of each stationary magnet subassembly comprises a rectangular bar permanent magnet, wherein the second permanent magnet section of each stationary magnet subassembly comprises a rectangular bar permanent magnet, and wherein the south mating portion of each stationary magnet subassembly comprises a concave section formed of magnetically permeable material. 28. The magnet assembly of claim 21 wherein the second movable subassembly is at least partially permanently magnetized with a magnetic vector from the second end mating portion to the first end mating portion, wherein the first end mating portion is a north end mating portion and the second end mating portion is a south end mating portion.
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