Outer rotor type brushless direct current motor
    3.
    发明授权
    Outer rotor type brushless direct current motor 失效
    外转子式无刷直流电机

    公开(公告)号:US06570288B1

    公开(公告)日:2003-05-27

    申请号:US09878907

    申请日:2001-06-13

    IPC分类号: H02K2122

    CPC分类号: H02K1/2786 H02K21/22

    摘要: An outer rotor type brushless direct current motor has an outer rotor including a plurality of permanent magnets attached along the inner circumference of an annular yoke such that the magnetic poles face the S magnetic poles. Thin sections are formed by chamfering the radially outer periphery of the two end sections in the circumferential direction of each of the permanent magnets. Magnetic flux passage sections of the yoke providing connection between the thin sections of adjacent permanent magnets are expanded radially inwards. In accordance with the above-mentioned arrangement, the cross section of the magnetic path in the magnetic flux passage sections is increased, thereby suppressing the occurrence of magnetic saturation and preventing the maximum torque of the permanent magnets from decreasing while reducing their size. Moreover, because the magnetic flux passage sections of the yoke are expanded radially inwards, the external dimensions of the yoke do not increase.

    摘要翻译: 外转子式无刷直流电动机具有外转子,该外转子包括沿着环形磁轭的内周安装的多个永久磁铁,使得磁极面对S磁极。 通过在每个永磁体的圆周方向上倒角两个端部的径向外周而形成薄壁部。 提供相邻永磁体的薄部之间的连接的磁轭的磁通通道部分径向向内扩展。 根据上述结构,磁通通路部分的磁路的横截面增大,从而抑制磁饱和的发生,并防止永磁体的最大转矩减小,同时减小其大小。 此外,由于磁轭的磁通通路部分径向向内扩张,所以磁轭的外部尺寸不增加。

    Electric motor and rotating device that changes relative phase of rotors
    4.
    发明授权
    Electric motor and rotating device that changes relative phase of rotors 失效
    改变转子相对相位的电动机和旋转装置

    公开(公告)号:US07683520B2

    公开(公告)日:2010-03-23

    申请号:US11713718

    申请日:2007-03-05

    IPC分类号: H02K1/22

    CPC分类号: H02K21/029

    摘要: This electric motor is provided with an inner periphery side rotor, an outer periphery side rotor, and a rotating device that can change a relative phase between these rotors by rotating at least one of them about a rotational axis thereof. The rotating device is provided with a first member integrally and rotatably provided to the outer periphery side rotor, and a second member integrally fixed on an inside of the inner periphery side rotor which together with the first member defines a pressure chamber on the inside of the inner periphery side rotor. The rotating device changes a relative phase between the inner periphery side rotor and the outer periphery side rotor by supplying a hydraulic fluid to the pressure chamber. The rotating device is further provided with a linking passage that leaks the hydraulic fluid supplied to the pressure chamber to an outside of the pressure chamber.

    摘要翻译: 该电动机设置有内周侧转子,外周侧转子和旋转装置,其可以通过使其中的至少一个绕其旋转轴线旋转来改变这些转子之间的相对相位。 旋转装置设置有一体地可旋转地设置在外周侧转子上的第一构件,以及一体地固定在内周侧转子内侧的第二构件,与第一构件一起形成在内侧侧转子的内侧的压力室 内周侧转子。 旋转装置通过向压力室供给液压流体来改变内周侧转子和外周侧转子之间的相对相位。 旋转装置还设置有将供应到压力室的液压流体泄漏到压力室外部的连接通道。

    Controller for motor
    5.
    发明授权
    Controller for motor 有权
    电机控制器

    公开(公告)号:US07622883B2

    公开(公告)日:2009-11-24

    申请号:US11882934

    申请日:2007-08-07

    IPC分类号: H02P1/26

    CPC分类号: H02P21/0003

    摘要: There is provided a controller for a motor capable of changing the phase difference between two rotors that can prevent demagnetization of permanent magnets or the rotors. The motor has two rotors each having a permanent magnet and phase difference changing driving means for changing the phase difference between the rotors. The controller has a demagnetization determining means for determining whether or not demagnetization of the permanent magnets of the rotors occurs during operation of the motor, and rotor phase difference controlling means for controlling the phase difference changing driving means to change the phase difference between the rotors from a current phase difference to a phase difference that results in a higher strength of a composite field of the permanent magnets if the result of determination by the demagnetization determining means is positive.

    摘要翻译: 提供了一种用于能够改变两个转子之间的相位差的电动机的控制器,其可以防止永磁体或转子的退磁。 电动机具有两个转子,每个转子具有用于改变转子之间的相位差的永磁体和相位差变化驱动装置。 该控制器具有一个去磁确定装置,用于确定在电动机操作期间是否发生转子的永久磁铁的退磁;以及转子相位差控制装置,用于控制相位差变化驱动装置,以将转子之间的相位差从 如果去磁确定装置的确定结果为正,则导致永磁体的复合磁场强度较高的相位差的电流相位差。

    Controller for motor
    7.
    发明授权
    Controller for motor 失效
    电机控制器

    公开(公告)号:US07622875B2

    公开(公告)日:2009-11-24

    申请号:US11826254

    申请日:2007-07-13

    IPC分类号: H02P25/00

    摘要: A change in torque produced by a motor having two rotors is reduced when the motor operates in a low-velocity and low-torque operational state. The motor has a first rotor and a second rotor, each of which has a permanent magnet, and an output shaft capable of rotating integrally with the first rotor. The second rotor can relatively rotate with respect to the first rotor by a driving force from a phase difference changing driving device, and the phase difference between the rotors (rotor phase difference) can be changed by the relative rotation of the second rotor with respect to the first rotor. When the values of the torque and the rotational velocity of the motor lie within a predetermined region in the proximity of 0, the phase difference changing driving device adjusts the rotor phase difference to a predetermined phase difference for which the strength of a composite field of the permanent magnets is lower than a maximum strength.

    摘要翻译: 当电动机以低速和低扭矩操作状态操作时,由具有两个转子的电动机产生的转矩的变化减小。 电动机具有第一转子和第二转子,每个转子和第二转子都具有永磁体,以及能够与第一转子一体旋转的输出轴。 第二转子可以通过来自相位差变化驱动装置的驱动力相对于第一转子相对旋转,并且转子之间的相位差(转子相位差)可以通过第二转子相对于 第一个转子。 当电动机的转矩和转速的值在0附近的预定区域内时,相位差变化驱动装置将转子相位差调整到预定的相位差,其中, 永久磁铁低于最大强度。

    Controller for motor
    8.
    发明申请
    Controller for motor 失效
    电机控制器

    公开(公告)号:US20080018291A1

    公开(公告)日:2008-01-24

    申请号:US11826254

    申请日:2007-07-13

    IPC分类号: H02P6/08 B60L15/20

    摘要: A change in torque produced by a motor having two rotors is reduced when the motor operates in a low-velocity and low-torque operational state. The motor has a first rotor and a second rotor, each of which has a permanent magnet, and an output shaft capable of rotating integrally with the first rotor. The second rotor can relatively rotate with respect to the first rotor by a driving force from a phase difference changing driving device, and the phase difference between the rotors (rotor phase difference) can be changed by the relative rotation of the second rotor with respect to the first rotor. When the values of the torque and the rotational velocity of the motor lie within a predetermined region in the proximity of 0, the phase difference changing driving device adjusts the rotor phase difference to a predetermined phase difference for which the strength of a composite field of the permanent magnets is lower than a maximum strength.

    摘要翻译: 当电动机以低速和低扭矩操作状态操作时,由具有两个转子的电动机产生的转矩的变化减小。 电动机具有第一转子和第二转子,每个转子和第二转子都具有永磁体,以及能够与第一转子一体旋转的输出轴。 第二转子可以通过来自相位差变化驱动装置的驱动力相对于第一转子相对旋转,并且转子之间的相位差(转子相位差)可以通过第二转子相对于 第一个转子。 当电动机的转矩和转速的值在0附近的预定区域内时,相位差变化驱动装置将转子相位差调整到预定的相位差,其中, 永久磁铁低于最大强度。

    Electric motor
    9.
    发明申请
    Electric motor 失效
    电动马达

    公开(公告)号:US20070273235A1

    公开(公告)日:2007-11-29

    申请号:US11802307

    申请日:2007-05-22

    IPC分类号: H02K21/12 H02K1/27

    CPC分类号: H02K21/029 H02K19/02

    摘要: This electric motor includes first permanent magnets secured integrally to an outer periphery side rotor and second permanent magnets secured integrally to an inner periphery side rotor. The first permanent magnets and the second permanent magnets are arranged so as to offset the relative torque produced between the outer periphery side rotor and the inner periphery side rotor based on the magnetic flux of the inner peripheral permanent magnets and the outer peripheral permanent magnets.

    摘要翻译: 该电动机包括一体地固定在外周侧转子上的第一永磁体和与内周侧转子一体地固定的第二永磁体。 第一永久磁铁和第二永久磁铁被配置成基于内周永久磁铁和外周永久磁铁的磁通量来抵消在外周侧转子和内周侧转子之间产生的相对转矩。