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    Method of controlling a torque ripple of a motor having interior permanent magnets and a controller using the same method
    9.
    发明授权
    Method of controlling a torque ripple of a motor having interior permanent magnets and a controller using the same method 失效
    使用相同方法控制具有内部永磁体的电动机的转矩脉动的方法和控制器

    公开(公告)号：US5962999A

    公开(公告)日：1999-10-05

    申请号：US126020

    申请日：1998-07-29

    申请人： Tomokazu Nakamura ,  Noriyoshi Nishiyama ,  Yasufumi Ikkai

    发明人： Tomokazu Nakamura ,  Noriyoshi Nishiyama ,  Yasufumi Ikkai

    IPC分类号： H02P6/10 ,  H02P6/00

    CPC分类号： H02P6/10

    摘要： Torque ripples of a motor having interior permanent magnets can be reduced through the following method and the torque ripple controller using the same method: first, drive the motor having a plurality of phase windings and interior permanent magnets with a basic current supply circuit which outputs a basic current having a predetermined waveform, then store torque ripple waves produced in the running motor or obtained through a numerical analysis into a torque-ripple-wave-memory, next, compensate the torque ripple wave tapped off from the memory according to a prepared torque ripple compensation pattern and transform it to a torque compensation waveform with a torque-compensation-waveform-producing-circuit, further, multiply the torque compensation waveform tapped off from the waveform producing circuit by the basic current with a multiplier to output a torque ripple control current, and, supply the torque ripple control current to the plurality of phase windings shifting a phase by a predetermined electrical angle sequentially.

    摘要翻译： 具有内部永磁体的电动机的扭矩波动可以通过以下方法和使用相同方法的转矩脉动控制器减小：首先，用基本电流供应电路驱动具有多个相绕组和内部永磁体的电动机，该基本电流供应电路输出 具有预定波形的基本电流，然后将在运行电动机中产生的转矩脉动波或通过数值分析获得的转矩脉动波存储到转矩脉动波存储器中，接下来，根据准备的转矩补偿从存储器中抽出的转矩脉动波 纹波补偿模式，并用转矩补偿波形生成电路将其转换为转矩补偿波形，此外，将乘以基本电流的波形发生电路分接的转矩补偿波形乘以乘法器输出转矩脉动控制 电流，并且将转矩脉动控制电流提供给多个相绕组，使相位移位a 预定的电角度。

    Rotor with adhesive filled grooves fastening interior permanent magnets
    10.
    发明授权
    Rotor with adhesive filled grooves fastening interior permanent magnets 有权
    转子与粘合剂填充槽紧固内部永磁体

    公开(公告)号：US06353275B1

    公开(公告)日：2002-03-05

    申请号：US09170702

    申请日：1998-10-13

    申请人： Noriyoshi Nishiyama ,  Tomokazu Nakamura

    发明人： Noriyoshi Nishiyama ,  Tomokazu Nakamura

    IPC分类号： H02K127

    CPC分类号： H02K1/2706 ,  H02K1/276

    摘要： A motor including a stator which has a plurality of teeth provided with windings on each of the teeth and a rotor which has permanent magnets inside the rotor, then the rotor includes a rotating shaft disposed at the center part, a rotor core fixed to the rotating shaft, permanent magnet slits formed inside the outer rim of the rotor core, grooves formed at the walls of the magnet slits, and the magnets inserted into the magnet slits. Then adhesive layers are formed in the magnet slits for sticking the magnets to the rotor core. In this structure, even if the size of the magnet slits and size of the magnet sections are substantially same, the adhesive remains at the grooves, so that the magnets are surely stuck to the rotor core. Also, by forming the grooves at the outer rotor rim side corners of the magnet slits, the magnetic flux short circuit of the magnets themselves and the possible travels of the magnetic flux into the adjacent magnets are suppressed. So that a highly reliable efficient motor with a high rotation speed is provided.

    摘要翻译： 一种电动机，包括具有在每个齿上设置有绕组的多个齿的定子和在转子内具有永磁体的转子，然后转子包括设置在中心部分的转轴，转子芯固定在旋转 轴，形成在转子芯的外缘内部的永久磁体狭缝，形成在磁体狭缝的壁处的凹槽和插入到磁体狭缝中的磁体。 然后在磁体狭缝中形成粘合剂层，以将磁体粘附到转子芯上。 在这种结构中，即使磁体狭缝的尺寸和磁体部分的尺寸基本相同，粘合剂保留在凹槽处，使得磁体可靠地粘附到转子芯上。 此外，通过在磁体狭缝的外转子边缘侧角形成槽，可以抑制磁体自身的磁通短路以及磁通量进入相邻磁体的可能行进。 因此，提供了具有高转速的高可靠性有效的电动机。