公开(公告)号：WO1997007586A1

公开(公告)日：1997-02-27

申请号：PCT/US1996013113

申请日：1996-08-14

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  PIECH, Zbigniew ,  MILLER, Robin, M. ,  KETTLE, John, L.

IPC: H02K41/03

CPC classification number: H02K41/03 ,  Y10T428/12021 ,  Y10T428/12028 ,  Y10T428/1275

Abstract: An induction motor is provided with a secondary portion (20) comprising an interlaced conductor/back-iron (or ferromagnetic) portion (60) and a purely ferromagnetic back-iron portion (62). The interlaced portion (60) comprises an electrically conductive lattice (or foam) material (61) having pores (63) filled with a ferromagnetic material which results in two interlaced lattices (61, 63) which are continuous through a shared volume. The interlaced region (60) provides both good magnetic permeability for passing magnetic flux (30) and good electrical conductivity for flowing induced electrical currents necessary for induction motors. As a result, the effective magnetic gap (G1) is minimized while also providing a low-cost induction motor. Alternatively, the lattice (61) may be a ferromagnetic material which is embedded with a conductor.

Abstract translation: 感应电动机设置有包括隔行导体/后铁（或铁磁）部分（60）和纯铁磁后铁部分（62）的次级部分（20）。 交错部分（60）包括具有填充有铁磁材料的孔（63）的导电晶格（或泡沫）材料（61），其导致通过共享体积连续的两个交错网格（61,63）。 交错区域（60）为感应电动机所需的流动感应电流提供良好的磁通量（30）和良好的导电性。 结果，有效磁隙（G1）最小化，同时还提供低成本的感应电动机。 或者，晶格（61）可以是嵌入导体的铁磁材料。

公开(公告)号：WO1997002732A3

公开(公告)日：1997-01-30

申请号：PCT/US1996010670

申请日：1996-06-21

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  COLBY, Roy, S. ,  PIECH, Zbigniew

IPC: F16C30/06

公开(公告)号：WO1997003301A1

公开(公告)日：1997-01-30

申请号：PCT/US1996010694

申请日：1996-06-21

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： UNITED TECHNOLOGIES CORPORATION ,  COLBY, Roy, S. ,  PIECH, Zbigniew

IPC: F16C39/06

CPC classification number: F16C32/0465 ,  F16C32/048

Abstract: A magnetic bearing with reduced bias-flux-induced rotor loss includes a stator (12), a rotor (14), the stator (12) having a configuration which minimizes a gap (g1) between stator teeth (80) thereby providing a more nearly uniform spatial distribution of the bias flux around the rotor-stator gap. The reduction in rotor losses include reduction in eddy current and hysteresis losses, thereby reducing electromagnetic drag and heat dissipation in the rotor associated with such losses, especially in high speed rotor applications.

Abstract translation: 具有减小的偏磁通量转子损失的磁轴承包括定子（12），转子（14），定子（12）具有使定子齿（80）之间的间隙（g1）最小化的构造，从而提供更多 转子 - 定子间隙周围偏置磁通的空间分布近似均匀。 转子损耗的减少包括减少涡流和滞后损耗，从而减少与这种损耗相关的转子中的电磁阻力和散热，特别是在高速转子应用中。

公开(公告)号：EP0832368A2

公开(公告)日：1998-04-01

申请号：EP96938614.0

申请日：1996-06-21

Applicant: UNITED TECHNOLOGIES CORPORATION

Inventor： COLBY, Roy, S. ,  PIECH, Zbigniew

IPC: F16C32 ,  F16C39 ,  H02K7

CPC classification number: F16C32/0459 ,  F16C32/048

Abstract: A magnetic bearing with reduced control-flux-induced rotor loss includes a rotor (14), and a stator (12) having a plurality of slots (S1-S16) around which coils (150-156) of a first Phase A and coils (160-166) of a second Phase B are wound. The winding configuration provides a two pole magnetic field around a rotor/stator gap (15) which is sinusoidal and which can be directed to any location along the gap (15). The configuration minimizes discontinuities or sharp changes in control flux in the gap which thereby reduces rotor losses. Also, the stator tooth gap (g1) is minimized to provide smooth flux distribution along the rotor/stator gap (15). More phases and more or less stator slots may be used.

公开(公告)号：EP0845170B1

公开(公告)日：1999-04-07

申请号：EP96927406.7

申请日：1996-08-14

Applicant: United Technologies Corporation

Inventor： PIECH, Zbigniew ,  MILLER, Robin, M. ,  KETTLE, John, L.

IPC: H02K41/03

CPC classification number: H02K41/03 ,  Y10T428/12021 ,  Y10T428/12028 ,  Y10T428/1275

Abstract: An induction motor is provided with a secondary portion (20) comprising an interlaced conductor/back-iron (or ferromagnetic) portion (60) and a purely ferromagnetic back-iron portion (62). The interlaced portion (60) comprises an electrically conductive lattice (or foam) material (61) having pores (63) filled with a ferromagnetic material which results in two interlaced lattices (61, 63) which are continuous through a shared volume. The interlaced region (60) provides both good magnetic permeability for passing magnetic flux (30) and good electrical conductivity for flowing induced electrical currents necessary for induction motors. As a result, the effective magnetic gap (G1) is minimized while also providing a low-cost induction motor. Alternatively, the lattice (61) may be a ferromagnetic material which is embedded with a conductor.

公开(公告)号：EP0845170A1

公开(公告)日：1998-06-03

申请号：EP96927406.0

申请日：1996-08-14

Applicant: United Technologies Corporation

Inventor： PIECH, Zbigniew ,  MILLER, Robin, M. ,  KETTLE, John, L.

IPC: H02K17 ,  H02K41

CPC classification number: H02K41/03 ,  Y10T428/12021 ,  Y10T428/12028 ,  Y10T428/1275

Abstract: An induction motor is provided with a secondary portion (20) comprising an interlaced conductor/back-iron (or ferromagnetic) portion (60) and a purely ferromagnetic back-iron portion (62). The interlaced portion (60) comprises an electrically conductive lattice (or foam) material (61) having pores (63) filled with a ferromagnetic material which results in two interlaced lattices (61, 63) which are continuous through a shared volume. The interlaced region (60) provides both good magnetic permeability for passing magnetic flux (30) and good electrical conductivity for flowing induced electrical currents necessary for induction motors. As a result, the effective magnetic gap (G1) is minimized while also providing a low-cost induction motor. Alternatively, the lattice (61) may be a ferromagnetic material which is embedded with a conductor.