[특허]Passive magnetic bearing element with minimal power losses

Passive magnetic bearing element with minimal power losses 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02K-007/09
출원번호	US-0552446 (1995-11-03)
발명자 / 주소	Post Richard F.
출원인 / 주소	The Regents of the University of California
대리인 / 주소	Sartorio
인용정보	피인용 횟수 : 64 인용 특허 : 0

초록 ▼

Systems employing passive magnetic bearing elements having minimal power losses are provided. Improved stabilizing elements are shown, employing periodic magnet arrays and inductively loaded circuits, but with improved characteristics compared to the elements disclosed in U.S. Patent No. 5,495,221 entitled "Dynamically Stable Magnetic Suspension/Bearing System." The improvements relate to increasing the magnitude of the force derivative, while at the same time reducing the power dissipated during the normal operation of the bearing system, to provide a passive bearing system that has virtually no losses under equilibrium conditions, that is, when the supported system is not subject to any accelerations except those of gravity.

대표청구항 ▼

[ I claim:] [1.] An apparatus, comprising:a first spatially periodic permanent magnetic array comprising a first Halbach array;a second spatially periodic permanent magnetic array comprising a second Halbach array, wherein said second spatially periodic permanent magnetic array is fixedly connected to said first spatially periodic permanent magnetic array and spaced apart from said first spatially periodic permanent magnetic array, wherein said first Halbach array and said second Halbach array are geometrically identical such that they have the same number of magnets and the same pole number so that their fields have the same azimuthal spatial periodicity;a conductor array movably located between said first Halbach array and said second Halbach array, wherein said conductor array comprises a plurality of inductive circuits;wherein azimuthal magnetic components of said first Halbach array and azimuthal magnetic components of said second Halbach array add at an equilibrium position between them, wherein said first Halbach array and said second Halbach array together are selected from a group consisting of two concentric cylinders and two planar arrays, wherein said two concentric cylinders are oriented azimuthally with respect to each other such that their radial magnetic components cancel at said equilibrium position, wherein said two planar arrays are oriented azimuthally with respect to each other such they are facing each other and that their axial components cancel at said equilibrium position; andmeans for sustaining said at least one rotatable element in stable equilibrium until said rotatable element has exceeded a critical angular velocity, wherein at said equilibrium position between said first Halbach array and said second Halbach array, said conductor array intercepts near zero flux, wherein the resistive power losses in said conductor array are reduced to near zero.

이 특허를 인용한 특허 (64)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Passive magnetic bearing element with minimal power losses 원문보기

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Passive magnetic bearing element with minimal power losses 원문보기

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