公开(公告)号：US08866360B2

公开(公告)日：2014-10-21

申请号：US13315846

申请日：2011-12-09

申请人： Khwaja M. Rahman ,  Sinisa Jurkovic

发明人： Khwaja M. Rahman ,  Sinisa Jurkovic

IPC分类号： H02K1/27

摘要： A rotor core for an Internal Permanent Magnet (IPM) machine includes a cavity having a magnet disposed therein. The cavity defines an air slot adjacent a radially outermost edge of the magnet disposed therein. A leakage flux path extends across the air slot and connects opposing sides of the cavity. The leakage flux path is oriented in an approximate tangential relationship relative to an axis of rotation of the rotor core, and is angled relative to the radially outermost edge of the magnet disposed within the cavity to direct flux away from the magnet. The cavity further includes an air pocket disposed along a radial inner surface of the magnet relative to the axis of rotation, adjacent the air slot of the cavity.

公开(公告)号：US08928197B2

公开(公告)日：2015-01-06

申请号：US13448516

申请日：2012-04-17

申请人： Sinisa Jurkovic ,  Khwaja M. Rahman

发明人： Sinisa Jurkovic ,  Khwaja M. Rahman

IPC分类号： H02K21/12

CPC分类号： H02K1/2766

摘要： An interior permanent magnet machine includes a rotor formed with a plurality of slots that are substantially arc-shaped and referred to herein as arc segments. A first layer of arc segments are disposed in a first pole. The first layer defines a first configuration relative to a first arc center. A second layer of arc segments are disposed in a second pole. The second layer defines a second configuration relative to a second arc center. The rotor is configured such that the first configuration is different from the second configuration, thereby exhibiting pole-to-pole asymmetry. The first configuration is sufficiently different from the second configuration such that torque ripple may be minimized. In one embodiment, the first layer includes first, second and third arc segments. The rotor may be configured such that the second arc segment is radially offset relative to the first and third arc segments.

摘要翻译： 内置永磁电机包括形成有多个狭槽的转子，其基本上是弧形的并且在本文中被称为弧段。 第一层弧段设置在第一极中。 第一层定义相对于第一圆弧中心的第一配置。 第二层弧段设置在第二极中。 第二层限定相对于第二圆弧中心的第二配置。 转子被配置为使得第一配置与第二配置不同，从而表现出极对不对称性。 第一配置与第二配置充分不同，使得扭矩波动可能被最小化。 在一个实施例中，第一层包括第一，第二和第三弧段。 转子可以被构造成使得第二弧形段相对于第一和第三弧段径向偏移。

公开(公告)号：US08917005B2

公开(公告)日：2014-12-23

申请号：US13315846

申请日：2011-12-09

申请人： Khwaja M. Rahman ,  Sinisa Jurkovic

发明人： Khwaja M. Rahman ,  Sinisa Jurkovic

IPC分类号： H02K1/27

CPC分类号： H02K1/2766

摘要： A rotor core for an Internal Permanent Magnet (IPM) machine includes a cavity having a magnet disposed therein. The cavity defines an air slot adjacent a radially outermost edge of the magnet disposed therein. A leakage flux path extends across the air slot and connects opposing sides of the cavity. The leakage flux path is oriented in an approximate tangential relationship relative to an axis of rotation of the rotor core, and is angled relative to the radially outermost edge of the magnet disposed within the cavity to direct flux away from the magnet. The cavity further includes an air pocket disposed along a radial inner surface of the magnet relative to the axis of rotation, adjacent the air slot of the cavity.

摘要翻译： 用于内部永磁（IPM）机器的转子芯包括其中设置有磁体的空腔。 空腔限定了与设置在其中的磁体的径向最外边缘相邻的空气狭槽。 泄漏磁通路径延伸穿过空气狭槽并连接空腔的相对侧。 泄漏磁通路径相对于转子芯的旋转轴线具有近似的切向关系，并且相对于设置在空腔内的磁体的径向最外边缘成角度，以将磁体引导离开磁体。 所述空腔还包括沿着所述磁体的径向内表面相对于所述空腔的所述空气狭槽相对于所述旋转轴设置的气穴。

公开(公告)号：US08884485B2

公开(公告)日：2014-11-11

申请号：US13448508

申请日：2012-04-17

申请人： Sinisa Jurkovic ,  Khwaja M. Rahman ,  Xinyu Zhou ,  Xu Han ,  Qiang Niu

发明人： Sinisa Jurkovic ,  Khwaja M. Rahman ,  Xinyu Zhou ,  Xu Han ,  Qiang Niu

IPC分类号： H02K21/12

CPC分类号： H02K1/2766 ,  H02K16/02 ,  H02K29/03 ,  H02K2201/03 ,  H02K2213/03

摘要： A permanent magnet machine is provided with a rotor positioned at least partially within a stator. The rotor includes first and second ring segments oriented axially around a central axis. The rotor defines first and second configurations in the first and second ring segments, respectively. The first configuration is sufficiently different from the second configuration such that torque ripple may be minimized. A first layer of slots, defining a slot outer edge, may be formed in the rotor. In one embodiment, a stator-to-slot gap varies between the first and second ring segments. In another embodiment, a stator-rotor gap varies between the first and second ring segments. In another embodiment, a bridge thickness varies between the first and second ring segments. Thus the rotor exhibits axial asymmetry.

摘要翻译： 一种永磁体机器设置有至少部分位于定子内的转子。 转子包括围绕中心轴线轴向取向的第一和第二环形段。 转子分别限定第一和第二环段中的第一和第二构造。 第一配置与第二配置充分不同，使得扭矩波动可能被最小化。 限定槽外边缘的第一层槽可以形成在转子中。 在一个实施例中，定子与槽间隙在第一和第二环段之间变化。 在另一个实施例中，定子 - 转子间隙在第一和第二环段之间变化。 在另一个实施例中，桥接厚度在第一和第二环段之间变化。 因此转子表现出轴向不对称性。

公开(公告)号：US20130270957A1

公开(公告)日：2013-10-17

申请号：US13448516

申请日：2012-04-17

申请人： Sinisa Jurkovic ,  Khwaja M. Rahman

发明人： Sinisa Jurkovic ,  Khwaja M. Rahman

IPC分类号： H02K1/27

CPC分类号： H02K1/2766

摘要： An interior permanent magnet machine includes a rotor formed with a plurality of slots that are substantially arc-shaped and referred to herein as arc segments. A first layer of arc segments are disposed in a first pole. The first layer defines a first configuration relative to a first arc center. A second layer of arc segments are disposed in a second pole. The second layer defines a second configuration relative to a second arc center. The rotor is configured such that the first configuration is different from the second configuration, thereby exhibiting pole-to-pole asymmetry. The first configuration is sufficiently different from the second configuration such that torque ripple may be minimized. In one embodiment, the first layer includes first, second and third arc segments. The rotor may be configured such that the second arc segment is radially offset relative to the first and third arc segments.

摘要翻译： 内置永磁电机包括形成有多个狭槽的转子，其基本上是弧形的并且在本文中被称为弧段。 第一层弧段设置在第一极中。 第一层定义相对于第一圆弧中心的第一配置。 第二层弧段设置在第二极中。 第二层限定相对于第二圆弧中心的第二配置。 转子被配置为使得第一配置与第二配置不同，从而表现出极对不对称性。 第一配置与第二配置充分不同，使得扭矩波动可能被最小化。 在一个实施例中，第一层包括第一，第二和第三弧段。 转子可以被构造成使得第二弧形段相对于第一和第三弧段径向偏移。

公开(公告)号：US20130270952A1

公开(公告)日：2013-10-17

申请号：US13448508

申请日：2012-04-17

申请人： Sinisa Jurkovic ,  Khwaja M. Rahman ,  Xinyu Zhou ,  Xu Han ,  Qiang Niu

发明人： Sinisa Jurkovic ,  Khwaja M. Rahman ,  Xinyu Zhou ,  Xu Han ,  Qiang Niu

IPC分类号： H02K1/27

CPC分类号： H02K1/2766 ,  H02K16/02 ,  H02K29/03 ,  H02K2201/03 ,  H02K2213/03

摘要： A permanent magnet machine is provided with a rotor positioned at least partially within a stator. The rotor includes first and second ring segments oriented axially around a central axis. The rotor defines first and second configurations in the first and second ring segments, respectively. The first configuration is sufficiently different from the second configuration such that torque ripple may be minimized. A first layer of slots, defining a slot outer edge, may be formed in the rotor. In one embodiment, a stator-to-slot gap varies between the first and second ring segments. In another embodiment, a stator-rotor gap varies between the first and second ring segments. In another embodiment, a bridge thickness varies between the first and second ring segments. Thus the rotor exhibits axial asymmetry.

摘要翻译： 一种永磁体机器设置有至少部分位于定子内的转子。 转子包括围绕中心轴线轴向取向的第一和第二环形段。 转子分别限定第一和第二环段中的第一和第二构造。 第一配置与第二配置充分不同，使得扭矩波动可能被最小化。 限定槽外边缘的第一层槽可以形成在转子中。 在一个实施例中，定子与槽间隙在第一和第二环段之间变化。 在另一个实施例中，定子 - 转子间隙在第一和第二环段之间变化。 在另一个实施例中，桥接厚度在第一和第二环段之间变化。 因此转子表现出轴向不对称性。

公开(公告)号：US20130147302A1

公开(公告)日：2013-06-13

申请号：US13315846

申请日：2011-12-09

申请人： Khwaja M. Rahman ,  Sinisa Jurkovic

发明人： Khwaja M. Rahman ,  Sinisa Jurkovic

IPC分类号： H02K1/27

CPC分类号： H02K1/2766

摘要： A rotor core for an Internal Permanent Magnet (IPM) machine includes a cavity having a magnet disposed therein. The cavity defines an air slot adjacent a radially outermost edge of the magnet disposed therein. A leakage flux path extends across the air slot and connects opposing sides of the cavity. The leakage flux path is oriented in an approximate tangential relationship relative to an axis of rotation of the rotor core, and is angled relative to the radially outermost edge of the magnet disposed within the cavity to direct flux away from the magnet. The cavity further includes an air pocket disposed along a radial inner surface of the magnet relative to the axis of rotation, adjacent the air slot of the cavity.

摘要翻译： 用于内部永磁（IPM）机器的转子芯包括其中设置有磁体的空腔。 空腔限定了与设置在其中的磁体的径向最外边缘相邻的空气狭槽。 泄漏磁通路径延伸穿过空气狭槽并连接空腔的相对侧。 泄漏磁通路径相对于转子芯的旋转轴线具有近似的切向关系，并且相对于设置在空腔内的磁体的径向最外边缘成角度，以将磁体引导离开磁体。 所述空腔还包括沿着所述磁体的径向内表面相对于所述空腔的所述空气狭槽相对于所述旋转轴设置的气穴。

公开(公告)号：US08860275B2

公开(公告)日：2014-10-14

申请号：US13560038

申请日：2012-07-27

申请人： Edward L. Kaiser ,  Khwaja M. Rahman ,  Sinisa Jurkovic

发明人： Edward L. Kaiser ,  Khwaja M. Rahman ,  Sinisa Jurkovic

IPC分类号： H02K1/27

CPC分类号： H02K1/2766

摘要： An interior permanent magnet machine includes a rotor configured to magnetically interact with a stator. First and second dividers are integrally formed within the rotor and configured to create a first layer of three respective first segments. Each of the respective first segments may be substantially arc-shaped. A plurality of first magnets may be positioned in the first layer. The first magnets may be substantially arc-shaped and defined around an arc center. A third and a fourth divider may be integrally formed within the rotor and configured to create a second layer of three respective second segments. The placement of dividers or structural webs provides for increased rotational speed and reduced rotational stress compared to an undivided arc-shaped magnet configuration.

摘要翻译： 内部永磁体机器包括被配置为与定子磁性相互作用的转子。 第一和第二分隔件一体地形成在转子内并且构造成产生三个相应的第一段的第一层。 每个相应的第一段可以是基本上弧形的。 多个第一磁体可以位于第一层中。 第一磁体可以基本上是弧形的并围绕圆弧中心限定。 第三和第四分隔器可以整体地形成在转子内并且被配置成产生三个相应的第二段的第二层。 与未分割的弧形磁体配置相比，分隔件或结构腹板的放置提供了增加的转速和降低的旋转应力。

公开(公告)号：US08760025B2

公开(公告)日：2014-06-24

申请号：US13570721

申请日：2012-08-09

申请人： Khwaja M. Rahman ,  Sinisa Jurkovic

发明人： Khwaja M. Rahman ,  Sinisa Jurkovic

IPC分类号： H02K21/12

CPC分类号： H02K1/2766 ,  H02K2213/03

摘要： A rotor core defines a plurality of cavities, and includes one magnet disposed within each cavity. Each magnet includes a cross section that defines an arcuate shape having an arc center. The magnets are arranged about a pole axis to define a first group of magnets disposed on a first side of the pole axis, and a second group of magnets disposed on a second side of the pole axis. The arc centers of each of the magnets of the first group of magnets and the second group of magnets are spaced from each other and are spaced from the pole axis. The plurality of magnets is arranged in a plurality of layers. The arc centers of each of the magnets in each of the layers are spaced from each other.

摘要翻译： 转子芯限定多个空腔，并且包括设置在每个空腔内的一个磁体。 每个磁体包括限定具有圆弧中心的弓形形状的横截面。 磁体围绕极轴布置以限定设置在极轴的第一侧上的第一组磁体，以及设置在极轴的第二侧上的第二组磁体。 第一组磁体和第二组磁体的每个磁体的圆弧中心彼此间隔开并且与磁极轴线间隔开。 多个磁体被布置成多个层。 每个层中每个磁体的圆弧中心彼此间隔开。

公开(公告)号：US08487494B2

公开(公告)日：2013-07-16

申请号：US13238008

申请日：2011-09-21

申请人： Sinisa Jurkovic ,  Khwaja M. Rahman ,  Xinyu Zhou ,  Xu Han ,  Qiang Niu

发明人： Sinisa Jurkovic ,  Khwaja M. Rahman ,  Xinyu Zhou ,  Xu Han ,  Qiang Niu

IPC分类号： H02K1/27

CPC分类号： H02K1/2766 ,  H02K1/276

摘要： An interior permanent magnet machine is provided with a rotor that includes a plurality of slots and at least one barrier defined by the plurality of slots. A plurality of first and second magnets are disposed within the barrier. The rotor is configured such that at least one of the first magnets is located at a different radial distance from the center of the rotor relative to at least one of the second magnets. The rotor may be configured to produce an averaging effect similar to that achieved through traditional skewing of rotor magnets. The rotor includes a plurality of poles defined by respective pole axes in the rotor and may be configured to reflect radial asymmetry between poles (pole-to-pole) and/or radial asymmetry within a pole.

摘要翻译： 内置永磁电机设有转子，转子包括多个槽和由多个槽限定的至少一个挡板。 多个第一和第二磁体设置在屏障内。 转子被构造成使得至少一个第一磁体位于与转子的中心相对于至少一个第二磁体不同的径向距离处。 转子可以被配置成产生类似于通过转子磁体的传统偏斜实现的平均效果。 转子包括由转子中的相应极轴限定的多个极，并且可以被配置成反射极之间的极（极 - 极）和/或径向不对称之间的径向不对称。