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    • 7. 发明授权
    • Magnetic bearing with phase-shifted loops
    • 带有相移环的磁性轴承
    • US5508573A
    • 1996-04-16
    • US237016
    • 1994-04-12
    • James A. AndrewsJoseph F. Pinkerton
    • James A. AndrewsJoseph F. Pinkerton
    • F16C32/04F16C39/06H02K7/09
    • F16C32/0436F16C32/044
    • A magnetic bearing system has magnets for producing magnetic fields, and first and second members which are rotationally fixed together. Each of the members is provided with closed loops of electrically conductive material. The members and magnets are relatively rotatable about an axis of rotation so that the loops travel along a prescribed circular path relative to and through the magnetic fields. The magnetic fields subject the loops to magnetic flux to produce electromotive forces in the loops when the loops deviate from their prescribed circular paths. This induces an electrical current in the loops. The direction of this electrical current is such that, in the presence of the magnetic fields, Lorentz forces are exerted on the loops and the loop-carrying members in directions which are lateral with respect to the circular path. To minimize fluctuations which may cause damaging vibrations, the loops and electromagnets are arranged so that the leading ends of the loops on the first member enter their magnetic fields at times which are different from the times that the leading ends of the loops on the second member enter their magnetic fields.
    • 磁轴承系统具有用于产生磁场的磁体,以及旋转地固定在一起的第一和第二构件。 每个构件设置有导电材料的闭环。 构件和磁体围绕旋转轴线可相对旋转,使得环路相对于并穿过磁场沿规定的圆形路径行进。 当环路偏离其规定的圆形路径时,磁场使环路受到磁通量的影响,从而在环路中产生电动势。 这会引起回路中的电流。 该电流的方向是这样的,在存在磁场的情况下,洛伦兹力在相对于圆形路径横向的方向上施加在环和环形承载构件上。 为了最小化可能引起有害振动的波动,环和电磁体被布置成使得第一构件上的环的前端在与第二构件上的环的前端不同的时间进入它们的磁场 进入他们的磁场。
    • 9. 发明授权
    • Integrated electromagnetic device and method
    • 集成电磁装置及方法
    • US5959522A
    • 1999-09-28
    • US17929
    • 1998-02-03
    • James A. Andrews
    • James A. Andrews
    • H01F7/08H01F17/00H01F5/00H01F27/28
    • H01F17/0006H01F7/08
    • An integrated electromagnetic device (112) provides increased inductance in a smaller area on a semiconductor substrate (130). A conduction path (140) is disposed on the substrate for developing the inductance. A first magnetic shield (142) is disposed between the substrate and the conduction path to concentrate the magnetic flux induced by current flowing along the conduction path, which increases the inductance. Inductance is further increased by shielding the magnetic flux from the substrate with the first magnetic shield, which reduces substrate eddy currents that oppose the applied current. A second magnetic shield (144) overlaying the conduction path is coupled to the first magnetic shield, further concentrating the magnetic flux and increasing the inductance.
    • 集成电磁装置(112)在半导体衬底(130)上的较小区域中提供增加的电感。 导电路径(140)设置在衬底上用于显影电感。 第一磁屏蔽(142)设置在基板和导电路径之间,以集中由沿着导电路径流动的电流感应的磁通,这增加了电感。 通过用第一磁屏蔽屏蔽来自衬底的磁通量进一步增加电感,这降低了与施加电流相对的衬底涡流。 覆盖导电路径的第二磁屏蔽(144)耦合到第一磁屏蔽,进一步集中磁通并增加电感。