公开(公告)号：US20050029888A1

公开(公告)日：2005-02-10

申请号：US10931421

申请日：2004-09-01

Applicant: Hirohide Inayama ,  Hideki Jonokuchi ,  Sadaaki Mori ,  Atsushi Ishihara ,  Tomofumi Takahashi ,  Minoru Kitabayashi ,  Tetsuo Horie

Inventor： Hirohide Inayama ,  Hideki Jonokuchi ,  Sadaaki Mori ,  Atsushi Ishihara ,  Tomofumi Takahashi ,  Minoru Kitabayashi ,  Tetsuo Horie

IPC: H02K1/27 ,  H02K29/03 ,  H02K21/12

CPC classification number: H02K1/278 ,  H02K29/03 ,  H02K2201/06 ,  Y10T29/49009

Abstract: A brushless DC motor including a stator having plural slots; and a rotor which has plural permanent magnets and is divided into three rotor blocks in a rotation axis direction, the three rotor blocks being layered so that the arrangement angles of the rotor blocks differ from each other by an amount of a mechanical angle in a rotary direction that is equivalent to one third of a pulsation period of cogging torque generated by the rotor and stator. A brushless DC motor including a rotor having plural magnetic poles provided at an equal pitch in a circumferential direction by mounting permanent magnets in magnet mounting holes; and a stator having plural slots arranged at an equal pitch in a circumferential direction. The magnetic poles of the rotor include magnetic poles whose magnet deviation angle formed by the central line of an effective polar opening angle and the central line of the magnet mounting hole is the first angle; and magnetic poles whose magnet deviation angle is the second angle different from the first angle.

公开(公告)号：US20040245880A1

公开(公告)日：2004-12-09

申请号：US10452946

申请日：2003-06-04

Inventor： Feng Liang

IPC: H02K021/12

CPC classification number: H02K1/278 ,  H02K2201/06

Abstract: A permanent magnet motor to reduce torque ripple includes a rotor having at least three segments. Each of the three segments is formed sequentially adjacent and aligned along an axis of the rotor. Each segment has at least one pair of permanent magnets disposed at a substantially equal interval in a peripheral direction of the rotor. First and second segments are skewed relative to each other by a first angular displacement, and the first and third segments are skewed relative to each other by a second angular displacement. The first and second angular displacements are selected to cause a net sum of torque ripple produced by each of the segments to be substantially equal to zero during an operation of the motor.

Abstract translation: 用于减小转矩波动的永磁电动机包括具有至少三个段的转子。 三个段中的每一个顺序地相邻地形成并沿着转子的轴线对齐。 每个段具有至少一对在转子的周向上以基本相等的间隔设置的永磁体。 第一和第二段相对于彼此倾斜第一角位移，并且第一和第三段相对于彼此倾斜第二角位移。 选择第一和第二角位移以在电动机的操作期间使由每个段产生的转矩波动的净和基本上等于零。

公开(公告)号：US06815863B1

公开(公告)日：2004-11-09

申请号：US09684988

申请日：2000-10-10

Applicant: Alan G. Jack ,  Barrie Mecrow ,  Öystein Krogen

Inventor： Alan G. Jack ,  Barrie Mecrow ,  Öystein Krogen

IPC: H02K1744

CPC classification number: H02K7/12 ,  H02K1/148 ,  H02K2201/06

Abstract: A stator (1) for an electrical induction machine comprises at least two stator sections (2, 3) at two different axial positions, each section having a plurality of circumferentially separated, radially extending teeth (6, 7) and each tooth having a single winding. The stator sections are mutually phase-shifted so as to reduce the effect of other harmonics than the working harmonics. In a stator having two separated stator sections, these are physically phase-shifted by 180° electrical±an angle related to skew, and then have their electrical supplies also shifted by 180° electrical.

Abstract translation: 一种用于感应电机的定子（1）包括在两个不同轴向位置处的至少两个定子部分（2,3），每个部分具有多个周向分离的径向延伸的齿（6,7），并且每个齿具有单个 绕组。 定子部分相互相移，以减少其他谐波对工作谐波的影响。 在具有两个分离的定子部分的定子中，它们物理相移180°电 - 与偏斜相关的角度，然后使其电源也偏移180°电。

公开(公告)号：US20040207280A1

公开(公告)日：2004-10-21

申请号：US10419620

申请日：2003-04-21

Applicant: Eaton Corporation

Inventor： Jian Luo ,  Jose Antonio Hernandez ,  Maria Hernandez ,  John Laskowsky

IPC: H02K021/12

CPC classification number: H02K1/278 ,  H02K29/03 ,  H02K2201/06

Abstract: A brushless DC permanent magnet motor having a step skewed rotor including a rotor shaft having a portion having a substantially uniform cross sectional configuration defined by N planar sides of substantially equal length and width wherein N is equal to the number of poles of the motor, first and second annular sets of N number of substantially identically shaped bread loaf magnets one of which is attached to each of the N planar sides of the rotor shaft wherein the magnets of the first set have their orientation reversed with respect to the magnets of the second set and the magnets of the first set are offset or skewed by a predetermined skew angle from the magnets of the second set of magnets to form a stepped skewed rotor.

Abstract translation: 一种无刷直流永磁电动机，其具有阶梯式偏转转子，其包括转子轴，该转子轴具有由基本相等的长度和宽度的N个平面侧限定的基本上均匀的横截面构造的部分，其中N等于电动机的极数， 以及N个基本上相同形状的面包磁铁的第二环形组，其中一个安装在转子轴的N个平面侧中的每一个上，其中第一组的磁体相对于第二组的磁体具有相反的方向 并且第一组的磁体与第二组磁体的磁体偏移或倾斜预定的倾斜角度，以形成阶梯式偏斜转子。

公开(公告)号：US20040207279A1

公开(公告)日：2004-10-21

申请号：US10413761

申请日：2003-04-15

Inventor： Carl Larue Godfrey

IPC: H02K021/12

CPC classification number: H02K1/278 ,  H02K16/02 ,  H02K21/14 ,  H02K2201/06

Abstract: An electromagnetic motor employing plural rotors is provided, with each rotor exhibiting a permanent magnetic field. A control module selectively induces magnetic fields in electromagnetic pads surrounding each of the rotors. Through the interaction of the permanent and induced magnetic fields, the rotors can turn. As a result, a shaft mechanically engaging the rotors also turns to provide mechanical power. In response to the shaft rotation, an alternator generates sufficient electrical power to sustain the operation of the control module without an external power source. The magnetic polarities of the induced magnetic fields can be reversed, thus causing the rotors to continue turning. In various applications, the motor can be installed in a vehicle or in a building power supply as desired.

Abstract translation: 提供采用多个转子的电磁马达，每个转子呈现永久磁场。 控制模块选择性地在围绕每个转子的电磁焊盘中感应出磁场。 通过永久和感应磁场的相互作用，转子可以转动。 结果，机械地接合转子的轴也转动以提供机械动力。 响应于轴旋转，交流发电机产生足够的电功率以在没有外部电源的情况下维持控制模块的操作。 感应磁场的磁极性可以颠倒，从而导致转子继续转动。 在各种应用中，电动机可以根据需要安装在车辆或建筑物电源中。

公开(公告)号：US20040164635A1

公开(公告)日：2004-08-26

申请号：US10708133

申请日：2004-02-09

Applicant: KABUSHIKI KAISHA MORIC

Inventor： Hideaki Takahashi ,  Koichi Sano

IPC: H02K021/12

CPC classification number: H02K29/03 ,  H02K2201/06

Abstract: Several embodiments of rotating electrical machines where cogging torque is reduced as well as the distortion of the back emf and improve torque characteristic with reduced torque ripples by dividing either the permanent magnets and/or the poles of the coil windings in axially separated portions that are circumferentially shifted relative to each other.

Abstract translation: 旋转电机的几个实施例，其中齿槽转矩减小以及反电动势的变形，并且通过将线圈绕组的永磁体和/或极分别在圆周方向上分开的轴向分离的部分中来减小扭矩波动， 相对移动。

公开(公告)号：US20040155547A1

公开(公告)日：2004-08-12

申请号：US10361971

申请日：2003-02-10

Inventor： Mohammad S. Islam ,  Tomy Sebastian

IPC: H02K001/27

CPC classification number: H02K1/278 ,  H02K29/03 ,  H02K2201/06

Abstract: A motor for reducing torque ripple includes a shaft having a shaft axis, a rotor positioned about the shaft, a first magnet ring positioned on the rotor, the first magnet ring having magnets each occupying a magnet angle null on the rotor, and a second magnet ring positioned on the rotor, the second magnet ring having magnets each occupying a magnet angle null on the rotor, wherein the second magnet ring is shifted a non-zero number of degrees relative to the first magnet ring and wherein ends of each magnet within the second magnet ring are located at different angular positions than ends of each magnet within the first magnet ring relative to the shaft axis of the shaft. The magnet angle null is preferably an optimal magnet angle for minimizing cogging torque and line to line back emf harmonics. A method of determining the optimal magnet angle includes determining a first magnet angle where cogging torque is minimized, determining a second magnet angle where harmonic content of nth harmonic is minimized, and using the first magnet angle and the second magnet angle, determining an optimal magnet angle for minimizing both cogging torque and nth harmonic.

Abstract translation: 用于减小转矩脉动的电动机包括：具有轴轴的轴，围绕轴定位的转子;位于转子上的第一磁环;第一磁环具有各自占据转子上的磁角ε的磁体;以及第二磁体 环，其中所述第二磁环具有各自占据所述转子上的磁角ε的磁体，其中所述第二磁环相对于所述第一磁体环移动非零数量级，并且其中所述磁体内的每个磁体的端部 第二磁环位于与第一磁环内的每个磁体相对于轴的轴轴线的端部不同的角位置。 磁体角度ε优选地是用于最小化齿槽转矩和线对线性emf谐波的最佳磁体角度。 确定最佳磁体角度的方法包括确定齿槽转矩最小化的第一磁体角度，确定n次谐波的谐波含量被最小化的第二磁体角度，以及使用第一磁体角度和第二磁体角度，确定 用于最小化齿槽转矩和第n次谐波的最佳磁体角度。

公开(公告)号：US20040084985A1

公开(公告)日：2004-05-06

申请号：US10636538

申请日：2003-08-08

Inventor： Takao Hasumi

IPC: H02K021/12

CPC classification number: H02K29/03 ,  H02K1/2786 ,  H02K2201/06

Abstract: A brushless motor A includes a permanent magnet used as a rotor 1 that is driven by three-phase power supply, wherein the permanent magnet is magnetized by a trapezoidal magnetization, and the trapezoidal magnetization is applied such that a generation period of a cogging torque is set to almost half of the generation period of the cogging torque generated when the permanent magnet to which a square magnetization is applied is used. In this brushless motor A, preferably a skew magnetization is also applied to the rotor 1. Further, in case of driven by a sinusoidal-wave current, the skew angle is set to the angle in the range that has null15% of the reference angle as an upper limit and a lower limit by a combination of a trapezoidal magnetization and a skew magnetization.

Abstract translation: 无刷电动机A包括用作由三相电源驱动的转子1的永磁体，其中永磁体被梯形磁化磁化，并且施加梯形磁化，使得齿槽转矩的产生周期为 设定为施加正方形磁化强度的永磁体时产生的齿槽转矩的产生周期的近一半。 在该无刷电动机A中，优选地，对转子1施加偏斜磁化。此外，在由正弦波电流驱动的情况下，将偏斜角设定为具有基准的±15％的范围内的角度 通过梯形磁化和歪斜磁化的组合将角度作为上限和下限。

公开(公告)号：US06713921B2

公开(公告)日：2004-03-30

申请号：US09850753

申请日：2001-05-08

Applicant: Tomy Sebastian ,  Sunil Keshava Murthy ,  Buyun Liu ,  Mark F. Fleer

Inventor： Tomy Sebastian ,  Sunil Keshava Murthy ,  Buyun Liu ,  Mark F. Fleer

IPC: H02K2112

CPC classification number: H02K1/278 ,  H02K2201/06

Abstract: A permanent magnet structure for use in brushless motors is disclosed. In an exemplary embodiment of the invention, the magnet structure includes a parallelogram shaped body. The body has an outer surface and an inner surface, with the outer surface and the inner surface being arcuate in shape.

Abstract translation: 公开了一种用于无刷电动机的永磁体结构。 在本发明的示例性实施例中，磁体结构包括平行四边形成形体。 主体具有外表面和内表面，外表面和内表面呈弓形。

公开(公告)号：US06703748B2

公开(公告)日：2004-03-09

申请号：US10145158

申请日：2002-05-13

Applicant: Kazuhiko Arai ,  Keijiro Igarashi ,  Masaaki Takezawa

Inventor： Kazuhiko Arai ,  Keijiro Igarashi ,  Masaaki Takezawa

IPC: H02K300

CPC classification number: H02K29/03 ,  H02K1/146 ,  H02K1/165 ,  H02K3/325 ,  H02K3/522 ,  H02K15/02 ,  H02K2201/06 ,  H02K2201/09 ,  H02K2203/06 ,  Y10T29/49009

Abstract: A stator core for a concentrated winding type brushless DC motor that has a plurality of spaced teeth extending inwardly of the core outer diameter to a core inner diameter to define slots between two adjacent teeth for a winding. Each tooth has right and left distal ends projecting in opposite directions transverse to the tooth with the opposite distal ends of two adjacent teeth each being linear and defining an aperture into a slot between the two teeth. The distal end of each tooth also has an angled edge at the side facing the core outer diameter so that the distal end is wider at the aperture than at the point where the distal end extends from the tooth. Also, there is a distance T between a line connnecting the end points of the right and left distal ends of a tooth facing the core outer diameter at the aperture defined by each said distal end and a tangent line at an inner core diameter of the tooth and such that T≧0.

Abstract translation: 一种用于集中绕线式无刷直流电动机的定子铁心，其具有从铁芯外径向内延伸至芯内径的多个间隔齿，以在两个相邻齿之间形成用于绕组的槽。 每个齿具有左右远端，其横向于齿的相反方向突出，两个相邻齿的相对的远端各自是线性的并且在两个齿之间限定一个孔。 每个齿的远端在面向芯外直径的一侧还具有成角度的边缘，使得远端在孔处比在远端从牙齿延伸的点处更宽。 此外，在由每个所述远端限定的孔处的面向芯外径的齿的左右远端的端点与在牙齿的内芯直径处的切线之间存在距离T 并且使得T> = 0。