公开(公告)号：US07622877B2

公开(公告)日：2009-11-24

申请号：US11685722

申请日：2007-03-13

申请人： Steven E. Schulz ,  Silva Hiti ,  Khwaja M. Rahman

发明人： Steven E. Schulz ,  Silva Hiti ,  Khwaja M. Rahman

IPC分类号： H02P7/00

CPC分类号： H02P21/02 ,  H02P21/0089 ,  H02P21/05

摘要： Methods and systems are provided for controlling permanent magnet machines under varying loads. The method comprises generating a d-axis voltage command and a q-axis voltage command, producing a modified d-axis current command based on the q-axis voltage command and a d-axis current command, converting the modified d-axis current command to a modified d-axis voltage command, and transmitting the modified d-axis voltage command and the q-axis voltage command to the PM machine. The d-axis voltage command is based on a d-axis current command.

摘要翻译： 提供了用于在变化的负载下控制永磁体机器的方法和系统。 该方法包括生成d轴电压指令和q轴电压指令，基于q轴电压指令和d轴电流指令产生修正的d轴电流指令，将修正的d轴电流指令 到修改的d轴电压指令，并将修改的d轴电压命令和q轴电压命令发送到PM机。 d轴电压指令基于d轴电流指令。

公开(公告)号：US06684483B2

公开(公告)日：2004-02-03

申请号：US09952319

申请日：2001-09-14

申请人： Khwaja M. Rahman ,  Peter James Savagian ,  Francois J. Biais ,  Constantin C. Stancu

发明人： Khwaja M. Rahman ,  Peter James Savagian ,  Francois J. Biais ,  Constantin C. Stancu

IPC分类号： H02K1500

CPC分类号： H02K15/03 ,  Y02T10/641 ,  Y10T29/49009 ,  Y10T29/49012 ,  Y10T29/49075 ,  Y10T29/49803

摘要： A method of fabricating a rotor for an electric traction motor including the steps of forming cavities in the rotor, injecting magnetic material in a portion of the cavities, injecting nonmagnetic material in a portion of the cavities, and post-magnetizing the magnetic material.

摘要翻译： 一种制造用于电动牵引电动机的转子的方法，包括以下步骤：在转子中形成空腔，在空腔的一部分中注入磁性材料，在空腔的一部分中注入非磁性材料，以及对磁性材料进行后磁化。

公开(公告)号：US06528964B2

公开(公告)日：2003-03-04

申请号：US09804557

申请日：2001-03-12

申请人： Steven E. Schulz ,  Khwaja M. Rahman

发明人： Steven E. Schulz ,  Khwaja M. Rahman

IPC分类号： H02D736

CPC分类号： H02P25/092

摘要： An inverter for use in a switched reluctance (SR) motor drive is provided. The inverter comprises a first and second transistor for selectively providing current to an SR motor winding. A resonant-type snubber circuit is connected to the transistors to reduce turn-off loss. The snubber circuit includes a pair of diodes, a capacitor, and an inductor. The snubber circuit is reset during switch-on time of the transistors. At transistor turn-off time, the snubber circuit uses the capacitor to effectively limit the rate of change of voltage across the transistors. This allows the transistors to turn off with lower losses, and can also reduce the acoustical noise generated by the motor drive.

摘要翻译： 提供一种用于开关磁阻（SR）电机驱动器的逆变器。 逆变器包括用于选择性地向SR电动机绕组提供电流的第一和第二晶体管。 谐振型缓冲电路连接到晶体管以减少关断损耗。 缓冲电路包括一对二极管，电容器和电感器。 缓冲电路在晶体管的接通时间被复位。 在晶体管截止时间，缓冲电路使用电容器来有效地限制晶体管两端的电压变化率。 这允许晶体管以较低的损耗关断，并且还可以降低由电动机驱动产生的声音噪声。

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：US08613131B2

公开(公告)日：2013-12-24

申请号：US12763494

申请日：2010-04-20

申请人： Terence G. Ward ,  Khwaja M. Rahman

发明人： Terence G. Ward ,  Khwaja M. Rahman

IPC分类号： H02K15/02 ,  H02K15/10

CPC分类号： H02K15/03 ,  H01F1/083 ,  H01F1/113 ,  H01F41/0273

摘要： Methods are provided for forming/inserting a magnet in a rotor. One method includes coating a plurality of magnetizable particles with a non-metallic material, inserting the coated particles in a rotor, and magnetizing the coated particles. Another method includes inserting a plurality of magnetizable particles into a rotor, submersing the rotor in motor varnish or another viscous, non-metallic material to coat the particles, and magnetizing the particles. Yet another method includes inserting a plurality of magnetizable particles in a rotor, inserting a non-metallic material into the rotor, mixing the particles and non-metallic material to form a mixture, curing the mixture to coat each particle with non-metallic material, and magnetizing the particles. Still another method includes mixing a plurality of magnetizable particles with a non-metallic material, curing the non-metallic material to coat each particle with non-metallic material, inserting the coated particles in a rotor, and magnetizing the coated particles.

摘要翻译： 提供了用于在转子中形成/插入磁体的方法。 一种方法包括用非金属材料涂覆多个可磁化颗粒，将涂覆的颗粒插入转子中，并使涂覆的颗粒磁化。 另一种方法包括将多个可磁化颗粒插入转子中，将转子浸入马达清漆或另一粘性非金属材料中以涂覆颗粒，并使颗粒磁化。 另一种方法包括将多个可磁化颗粒插入转子中，将非金属材料插入转子中，将颗粒和非金属材料混合以形成混合物，固化混合物以用非金属材料涂覆每个颗粒， 并使颗粒磁化。 另一种方法包括将多个可磁化颗粒与非金属材料混合，固化非金属材料以用非金属材料涂覆每个颗粒，将涂覆的颗粒插入转子中，并使涂覆的颗粒磁化。

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。