[특허]Magnetic bearing structure providing radial, axial and moment load bearing support for a rotatable shaft

Magnetic bearing structure providing radial, axial and moment load bearing support for a rotatable shaft 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02K-007/09
출원번호	US-0825984 (1992-01-27)
발명자 / 주소	Meeks Crawford R. (Woodland Hills CA)
출원인 / 주소	Avcon-Advanced Controls Technology, Inc. (Northridge CA 02)
인용정보	피인용 횟수 : 68 인용 특허 : 0

초록 ▼

A magnetic bearing structure utilizes two adjacent electromagnetic bearings to provide controlled radial, thrust and moment load support of a shaft relative to a housing. The first bearing generates a high density controllable magnetic field to radially flux couple the shaft to the housing. A second bearing generates a high density controllable magnetic field to axially flux couple the shaft to the housing. In a preferred form, the first bearing circumferentially surrounds the shaft and includes a stator ring associated with the housing which holds several electromagnetic coils radially spaced from the shaft. Power supplied to the coils generates a radially polarized electromagnetic field surrounding the shaft. A pair of additional electromagnetic coils, or permanent magnets, circumferentially extend around the shaft to generate an axially polarized, constant flux magnetic field. Substantially all of the magnetic flux generated by both flux generation sources is directed radially through a primary air gap between the shaft and the stator ring to provide radial support for the shaft. The second bearing includes two coil housings between which a thrust disc associated with the shaft extends. Two arcuate permanent magnets within the disc generate a constant flux radially polarized magnetic field. Three pairs of electromagnetic coils, each subtending a 120 degree arc, are placed within the coil housings to generate an axially polarized, controllable magnetic field. Magnetic flux generated by the permanent magnets and the paired electromagnetic coils axially couples the shaft to the housing.

대표청구항 ▼

An electromagnetic bearing structure for supporting a rotatable member including a thrust disc with respect to a stationary member, the bearing structure comprising: first bearing means associated with the stationary member, for generating a high density controllable magnetic field surrounding a first portion of the rotatable member, and for coupling the rotatable member to the stationary member through radially-directed magnetic flux; and second bearing means adjacent to the first bearing means and associated with the stationary member, for generating a high density controllable magnetic field surrounding said thrust disc, and for coupling the rotatable member to the stationary member through axially-directed magnetic flux; wherein the first and second bearing means provide controlled radial , thrust and moment load support of the rotatable member relative to the stationary member.

이 특허를 인용한 특허 (68)

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Barber, Gerald L., Electrical generator for wind turbine.
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Michael Heiberger ; Michael Robert Reed, Homopolar machine with shaft axial thrust compensation for reduced thrust bearing wear and noise.
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Saban, Daniel M.; Stout, John, Hybrid winding configuration of an electric machine.
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Galbreath,Curt; Winkler,Richard J.; Seberger,Stephen G., Integral hall effect limit switch for control valve stem position sensor.
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Iannello Victor ; Willis ; Jr. Richard M., Light weight, high performance radial actuator for magnetic bearing systems.
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Koren, Zion; Ma, Yorkman; Tomas Cardema, Rudy Santo; Taoka, James Tsuneo; Wride, Lois; McFarland, Craig; Gibson, Shawn, Method and system for rotating a semiconductor wafer in processing chambers.
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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

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Magnetic bearing structure providing radial, axial and moment load bearing support for a rotatable shaft 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (68)

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Magnetic bearing structure providing radial, axial and moment load bearing support for a rotatable shaft 원문보기

초록 ▼

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연구과제 타임라인

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이 특허를 인용한 특허 (68)

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