公开(公告)号：EP2904692A4

公开(公告)日：2017-03-29

申请号：EP13895140

申请日：2013-10-08

申请人： ACTIVE POWER INC

发明人： ANDREWS JAMES T ,  SCHUETZE KARL THOMAS

IPC分类号： F16C39/06 ,  F16C32/04 ,  F16F15/315 ,  H02K7/09

CPC分类号： H02K7/09 ,  F16C19/54 ,  F16C32/04 ,  F16C32/0408 ,  F16C32/0461 ,  F16C32/0495 ,  F16C39/06 ,  F16C2300/34 ,  F16C2361/55 ,  H02K5/16 ,  H02K5/1732 ,  H02K7/025 ,  H02K2205/03 ,  Y02E60/16

摘要： Apparatus and methods for providing a pre-determined axial thrust force profile for use in a rotating machine that includes a magnetically permeable rotor with first and second surfaces and a generally perpendicular shaft is disclosed. One or more bearings support the shaft and a coil induces flux in the rotor. First and second pole pieces disposed adjacent to the first and second surfaces define first and second gaps. A series magnetic circuit including the pole pieces, the gaps and the rotor carries flux generated by current flowing in the coil. Pole pieces and gaps provide substantially similar reluctance in both gaps. Magnetic saturation characteristics of a series magnetic circuit may provide a pre-determined axial force profile as a function of coil current. A first magnetic saturation characteristic may provide a maximum axial force at a first current magnitude. A second magnetic saturation characteristic may provide a lower axial force at a current greater than the first current. The saturation characteristic may be formed by configuring the geometry and dimensions of the poles. The axial force profile may be formed to reduce the net axial thrust load on the bearings.

摘要翻译： 装置和一种用于在旋转机械的使用提供了一个预先确定的轴向推力的力分布方法确实包括与第一和第二表面的可导磁的转子和基因反弹垂直轴被圆盘游离缺失。 一个或多个轴承支撑所述轴和线圈感应的磁通在转子中。 设置成邻近所述第一和第二表面的第一和第二磁极片限定第一和第二间隙。 一系列磁电路，其包括磁极片，间隙和转子磁通携带通过在线圈中流动的电流产生的。 极片和差距提供两个缺口大体上同样的不情愿。 一系列磁路的磁饱和特性可提供一个预先确定的轴向力轮廓线圈电流的函数。 第一磁饱和特性可在第一电流幅值提供最大的轴向力。 第二磁饱和特性可以以比所述第一电流的电流更大提供较低的轴向力。 饱和特性可通过配置的几何形状和磁极的尺寸来形成。 的轴向力轮廓可以被形成为降低轴承上的净轴向推力负荷。