Rotary permanent magnet electric motor having stator pole shoes of varying dimensions

    公开(公告)号:US06822368B2

    公开(公告)日:2004-11-23

    申请号:US10207847

    申请日:2002-07-31

    IPC分类号: H02K112

    摘要: Rotary permanent magnet motors have salient stator poles with nonuniform pole thickness in the radial direction for compensating effects of cogging torque. Pole base portions terminate at pole shoes at the radial air gap. The pole shoes extend in the circumferential direction from the bulkier base portions. Variation of the thickness of the pole shoe changes the concentration of the effective flux at the point of coupling between the stator poles and the permanent magnet pole shoes. As there is no change in the active interfacing area of the pole shoes a uniform air gap is maintained. The torque signature for each stator pole/rotor permanent magnet interface can be selectively changed to smooth motor operation by configuring the stator pole shoe thickness to vary along its circumferential extent as appropriate. Pole shoes may have tapered leading or trailing edges with respect to a pole base to change the effective flux density in the air gap at a specific pitch of rotation. Additionally, the pole shoe may be shifted off center with respect to the pole base.

    Multiphase motor having winding connections specific to respective operating speed ranges
    2.
    发明授权
    Multiphase motor having winding connections specific to respective operating speed ranges 有权
    具有特定于相应工作速度范围的绕组连接的多相电动机

    公开(公告)号:US06812661B2

    公开(公告)日:2004-11-02

    申请号:US10290505

    申请日:2002-11-08

    IPC分类号: H02P700

    CPC分类号: H02P25/20 H02P1/48

    摘要: A permanent magnet motor includes salient pole stator cores. The poles and/or linking portions therebetween are wound with a plurality of winding coil sets. Mutually exclusive speed ranges are established between startup and a maximum speed at which the motor can be expected to operate. A different number of the motor stator winding coils are designated to be energized for each speed range for maximum operating efficiency. The number of energized coils are changed dynamically as the speed crosses a threshold between adjacent speed ranges.

    摘要翻译: 永磁电动机包括凸极定子铁芯。 其间的极和/或连接部分用多个绕组线圈组缠绕。 在启动和电机可以预期运行的最大速度之间建立相互专用的速度范围。 指定不同数量的电动机定子绕组线圈为每个速度范围通电以实现最大的操作效率。 当速度超过相邻速度范围之间的阈值时,通电线圈的数量会动态变化。

    Rotary permanent magnet electric motor with varying air gap between interfacing stator and rotor elements
    3.
    发明授权
    Rotary permanent magnet electric motor with varying air gap between interfacing stator and rotor elements 失效
    旋转永磁电动机在接口定子和转子元件之间具有不同的气隙

    公开(公告)号:US06727630B1

    公开(公告)日:2004-04-27

    申请号:US10207848

    申请日:2002-07-31

    IPC分类号: H02K2902

    摘要: A permanent magnet motor is configured with selective variation of the radial distance between an interfacing pair of rotor permanent magnet and stator pole along the circumferential length of the pair. The effects of cogging torque on the overall torque signature can be controlled by setting an appropriate air gap variation profile. The stator pole and rotor magnet surfaces may be sloped with respect to each other, the angle therebetween being selected to obtain desired cogging torque compensation. Other air gap variation profiles may include provision of concave surfaces, the degree of concavity being selectable.

    摘要翻译: 永磁电动机被构造成沿着该对的圆周长度,在一对转子永磁体和定子极之间的径向距离的选择性变化。 可以通过设置适当的气隙变化曲线来控制齿槽转矩对整体扭矩特征的影响。 定子极和转子磁体表面可以相对于彼此倾斜,其间的角度被选择以获得期望的齿槽转矩补偿。 其他气隙变化曲线可以包括提供凹面,凹度等于可选择。

    Rotary electric motor having a plurality of shifted stator poles and/or rotor poles
    4.
    发明授权
    Rotary electric motor having a plurality of shifted stator poles and/or rotor poles 失效
    具有多个位移的定子极和/或转子极的旋转电动机

    公开(公告)号:US06727629B1

    公开(公告)日:2004-04-27

    申请号:US10160254

    申请日:2002-06-04

    IPC分类号: H02K112

    摘要: A rotary electric motor has a stator with a plurality of axially spaced sets of corresponding stator and rotor elements. The stator of each set is an annular ring with poles circumferentially positioned about an axis of rotation. The rotor of each set has a plurality of permanent magnets disposed circumferentially along an annular air gap opposite the stator poles. The permanent magnets of adjacent rotor element sets and/or the poles of adjacent stator sets are offset from each other in the axial direction to cancel the effects of cogging torque produce by each of the sets.

    摘要翻译: 旋转电动机具有定子,其具有多个轴向间隔开的相应的定子和转子元件组。 每组的定子是环形环,其环绕旋转轴线周向定位。 每组的转子具有沿着与定子极相对的环形气隙周向设置的多个永磁体。 相邻的转子元件组和/或相邻定子组的极的永磁体在轴向方向彼此偏移以消除由每组组产生的齿槽转矩的影响。

    Rotary electric motor having both radial and axial air gap flux paths between stator and rotor segments
    6.
    发明授权
    Rotary electric motor having both radial and axial air gap flux paths between stator and rotor segments 失效
    旋转电动机具有定子和转子段之间的径向和轴向气隙磁通路径

    公开(公告)号:US06891306B1

    公开(公告)日:2005-05-10

    申请号:US10134425

    申请日:2002-04-30

    摘要: In a rotary electric motor, a stator contains a plurality of separate electromagnet core segments disposed coaxially about an axis of rotation. The core segments are affixed, without ferromagnetic contact with each other, to a non-ferromagnetic support structure. The rotor is configured in a U-shaped annular ring that at least partially surrounds the annular stator to define two parallel axial air gaps between the rotor and stator respectively on opposite axial sides of the stator and at least one radial air gap. Permanent magnets are distributed on each inner surface of the U-shaped rotor annular ring that faces an air gap. A winding is formed on a core portion that links axially aligned stator poles to produce, when energized, magnetic poles of opposite polarity at the pole faces.

    摘要翻译: 在旋转电动机中,定子包含围绕旋转轴同轴设置的多个分离的电磁铁芯段。 将铁芯片固定在一起,而不会铁磁性地接触到非铁磁性支撑结构。 转子构造成U形环形环,其至少部分地围绕环形定子,以分别在定子的相对的轴向侧面和至少一个径向空气间隙上分别在转子和定子之间限定两个平行的轴向空气间隙。 永磁体分布在面向气隙的U形转子环的每个内表面上。 绕组形成在连接轴向对准的定子极的芯部分上,以在激励时产生极面处具有相反极性的磁极。

    Precision brushless motor control utilizing independent phase parameters
    7.
    发明授权
    Precision brushless motor control utilizing independent phase parameters 失效
    采用独立相位参数的精密无刷电机控制

    公开(公告)号:US06727668B1

    公开(公告)日:2004-04-27

    申请号:US10173610

    申请日:2002-06-19

    IPC分类号: H02P2900

    CPC分类号: H02P25/08 H02P23/0004

    摘要: A control system for a multiphase permanent magnet motor compensates for physical variations among individual motor phase circuit elements. The control system successively develops a control voltage for switched energization of the motor phase windings that is closely matched with particular parameters of the corresponding windings. The system can be applied to a motor in which each stator phase component comprises a ferromagnetically isolated stator electromagnet, the electromagnet core elements being separated from direct contact with each other and formed with separate phase windings. A digital signal processor may be utilized that applies an algorithm incorporating the parameters as constant values, the parameters for a particular phase being accessed for generating the appropriate control signals for energizing that phase.

    摘要翻译: 用于多相永磁电动机的控制系统补偿各个电动机相电路元件之间的物理变化。 控制系统连续地形成与相应绕组的特定参数紧密匹配的电动机相绕组的开关通电的控制电压。 该系统可以应用于其中每个定子相位分量包括铁磁隔离的定子电磁体的电动机,电磁铁芯元件与彼此直接接触分离并且形成有单独的相绕组。 可以使用数字信号处理器,其将包含参数的算法应用为常数值,用于特定相位的参数被访问以产生用于激励该相位的适当控制信号。

    Rotary electric motor having at least three axially aligned stator poles and/or rotor poles
    8.
    发明授权
    Rotary electric motor having at least three axially aligned stator poles and/or rotor poles 失效
    具有至少三个轴向对齐的定子极和/或转子极的旋转电动机

    公开(公告)号:US06710502B2

    公开(公告)日:2004-03-23

    申请号:US10067305

    申请日:2002-02-07

    IPC分类号: H02K112

    CPC分类号: H02K1/187 H02K21/22

    摘要: A rotary electric motor has a stator with a plurality of separate and ferromagnetically isolated electromagnet core segments disposed coaxially about an axis of rotation. The core segments are supported by a non-ferromagnetic structure. Each core segment has at least three poles aligned in a direction parallel to the axis. Windings are formed on portions linking the poles so that, when energized, the center pole forms a magnetic polarity opposite to the magnetic polarity of the other poles. The rotor comprises a plurality of axial rows of permanent magnets disposed circumferentially along the air gap. Each axial row of rotor magnets comprises a center permanent magnet of one magnetic polarity and, at each axial side thereof, a permanent magnet of a magnetic polarity opposite to the polarity of the center magnet.

    摘要翻译: 旋转电动机具有定子,该定子具有多个独立且铁磁隔离的电磁铁芯段,其围绕旋转轴同轴设置。 铁芯段由非铁磁结构支撑。 每个芯段具有在平行于该轴线的方向上对齐的至少三个极点。 在连接极点的部分上形成绕组,使得当被激励时,中心极形成与另一个极的磁极性相反的磁极性。 转子包括沿气隙沿圆周设置的多个轴向排永久磁铁。 每个轴向排的转子磁体包括一个磁极性的中心永磁​​体,并且在其每个轴向侧具有与中心磁体的极性相反的磁极性的永磁体。

    Rotary electric motor having axially aligned stator poles and/or rotor poles
    9.
    发明授权
    Rotary electric motor having axially aligned stator poles and/or rotor poles 失效
    具有轴向排列的定子极和/或转子极的旋转电动机

    公开(公告)号:US06617746B1

    公开(公告)日:2003-09-09

    申请号:US09966101

    申请日:2001-10-01

    IPC分类号: H02K300

    摘要: A rotary electric motor comprises a rotor having a plurality of permanent magnet elements disposed in an annular ring configuration about an axis of rotation, the magnet elements successively alternating in magnetic polarity along an inner annular surface, and a stator spaced from the rotor by a radial air gap. The stator includes a plurality of magnetic core segments having respective coils wound thereon to form stator windings, the core segments separated from direct contact with each other and disposed along the radial air gap. Each stator segment comprises a pair of poles aligned with each other in a direction parallel to the axis of rotation. Thus the stator comprises a first set of stator poles in radial alignment and an axially displaced second set of stator poles in radial alignment.

    摘要翻译: 旋转电动机包括转子,转子具有围绕旋转轴设置在环形环形中的多个永磁体元件,磁体元件沿着内环形表面依次以磁极的方式连续交替,并且定子与转子间隔开径向 气隙。 定子包括多个磁芯段,其具有卷绕在其上的相应线圈以形成定子绕组,所述芯段彼此直接接触并且沿着径向气隙设置。 每个定子段包括在平行于旋转轴线的方向上彼此对准的一对极。 因此,定子包括径向对准的第一组定子极和径向对准的轴向移位的第二组定子极。

    Permanent magnet motor rotor having magnetic permeable material for enhanced flux distribution
    10.
    发明授权
    Permanent magnet motor rotor having magnetic permeable material for enhanced flux distribution 有权
    永磁电动机转子具有用于增强磁通分布的导磁材料

    公开(公告)号:US06844645B2

    公开(公告)日:2005-01-18

    申请号:US10290506

    申请日:2002-11-08

    IPC分类号: H02K1/27 H02K21/22 H02K21/12

    CPC分类号: H02K1/2786 H02K1/32

    摘要: A permanent magnet motor has rotor structure that includes magnetically permeable backing material attached to magnets for enhancing flux density distribution. A plurality of permanent magnets are circumferentially distributed about an axis of rotation, adjacent magnets successively alternating in magnetic polarity. The magnetically permeable material is configured with apertures therethrough at areas of low flux density, such as at central portions of the magnets, while in contact with perimeter areas of the magnets. Additional apertures in the material may be located at spaced intersections at which no significant flux density exists. The apertures may be replaced with backing material portions of reduced radial thickness.

    摘要翻译: 永磁电动机具有转子结构,其包括附接到磁体的磁性可渗透背衬材料,用于增强磁通密度分布。 多个永磁体围绕旋转轴线周向分布,相邻的磁体以磁极顺序交替。 导磁材料在低磁通密度的区域(例如在磁体的中心部分)处配置有穿过其的孔,同时与磁体的周边区域接触。 材料中的另外的孔可以位于不存在明显的通量密度的间隔的交叉处。 孔可以用径向厚度减小的背衬材料部分代替。