公开(公告)号：US08054024B2

公开(公告)日：2011-11-08

申请号：US12328001

申请日：2008-12-04

申请人： Shigeo Hayashi ,  Yosuke Kawano ,  Satoshi Komatsu

发明人： Shigeo Hayashi ,  Yosuke Kawano ,  Satoshi Komatsu

IPC分类号： H02P6/18

CPC分类号： H02P6/18 ,  Y10S388/923

摘要： A brushless motor driven by a sensorless driving circuit includes a rotating body capable of being rotated about a center axis; a rotor magnet arranged coaxially with the rotating body; a stator disposed opposite the rotor magnet; and at least one coil wound around the stator. The brushless motor is driven according to a signal containing a third harmonic component relative to a fundamental wave component in an induced electromotive force. Further, an amplitude ratio of the third harmonic component to the fundamental wave component in the induced electromotive force generated in the coil preferably is about 1% or higher.

摘要翻译： 由无传感器驱动电路驱动的无刷电动机包括能够围绕中心轴旋转的旋转体; 与旋转体同轴设置的转子磁体; 与转子磁体相对设置的定子; 以及缠绕在定子上的至少一个线圈。 根据感应电动势中相对于基波分量的三次谐波分量的信号来驱动无刷电动机。 此外，在线圈中产生的感应电动势中的三次谐波分量与基波分量的振幅比优选为约1％以上。

公开(公告)号：US08082561B2

公开(公告)日：2011-12-20

申请号：US12252483

申请日：2008-10-16

申请人： Hitoshi Takaki ,  Shigeo Hayashi ,  Yusuke Iwai ,  Nobuaki Yasumoto ,  Yosuke Kawano

发明人： Hitoshi Takaki ,  Shigeo Hayashi ,  Yusuke Iwai ,  Nobuaki Yasumoto ,  Yosuke Kawano

IPC分类号： G11B17/00

CPC分类号： H02K7/09 ,  G11B19/2009 ,  H02K7/085 ,  H02K21/22 ,  H02N13/00

摘要： A motor includes a rotating body including a magnet, and a fixed body including a stator. The stator includes a stator core having an annular core back portion with an upper and a lower surface, and a plurality of circumferentially spaced-apart tooth portions extending from the core back portion in a direction away from the rotational axis, and a plurality of coils provided by winding a conductive wire around the tooth portions of the stator core with multiple turns. The rotor holder is arranged axially above the stator to cover the stator. Further, an annular or arc-shaped attracting magnet arranged to attract the rotor holder toward the stator is arranged radially inwardly of the core back portion, the attracting magnet having an upper surface axially facing toward the rotor holder, and a lower surface arranged axially below the upper surface of the core back portion of the stator core.

摘要翻译： 电动机包括具有磁体的旋转体和具有定子的固定体。 定子包括具有上下表面的环形芯背部的定子芯和从远离旋转轴线的方向从芯背部延伸的多个周向间隔开的齿部，以及多个线圈 通过绕多个匝的定子芯的齿部部分缠绕导电线来提供。 转子保持器轴向地布置在定子上方以覆盖定子。 此外，设置成将转子保持器朝向定子吸引的环形或弧形吸引磁体布置在芯部后部的径向内侧，吸引磁体具有轴向面向转子保持器的上表面，并且下表面轴向地布置 定子芯的芯部后部的上表面。

公开(公告)号：US08018107B2

公开(公告)日：2011-09-13

申请号：US12416214

申请日：2009-04-01

申请人： Nobuaki Yasumoto ,  Hitoshi Takaki ,  Masahiro Yamada ,  Yosuke Kawano

发明人： Nobuaki Yasumoto ,  Hitoshi Takaki ,  Masahiro Yamada ,  Yosuke Kawano

IPC分类号： H02K5/04 ,  H02K5/00

CPC分类号： H02K5/04 ,  G11B19/2009 ,  H02K11/33 ,  H05K1/189

摘要： A brushless motor includes a substantially flat attachment plate and a circuit board. The attachment plate includes a plurality of motor attachment portions and a base portion arranged to interconnect the motor attachment portions. The circuit board is arranged on an upper surface of the base portion and includes a first area to which electronic parts are attached. The upper surfaces of the motor attachment portions are arranged higher than the upper surface of the base portion. The height of the upper surface of the circuit board in the first area is substantially equal to or greater than the height of the upper surfaces of the motor attachment portions.

摘要翻译： 无刷电动机包括基本平坦的附接板和电路板。 附接板包括多个马达安装部和布置成互连马达安装部的基部。 电路板设置在基部的上表面上，并且包括附接有电子部件的第一区域。 马达安装部分的上表面布置成高于基部的上表面。 第一区域中电路板的上表面的高度基本上等于或大于马达安装部分的上表面的高度。

公开(公告)号：US20090252015A1

公开(公告)日：2009-10-08

申请号：US12416214

申请日：2009-04-01

申请人： Nobuaki YASUMOTO ,  Hitoshi TAKAKI ,  Masahiro YAMADA ,  Yosuke KAWANO

发明人： Nobuaki YASUMOTO ,  Hitoshi TAKAKI ,  Masahiro YAMADA ,  Yosuke KAWANO

IPC分类号： G11B7/00 ,  H02K5/04

CPC分类号： H02K5/04 ,  G11B19/2009 ,  H02K11/33 ,  H05K1/189

摘要： A brushless motor includes a substantially flat attachment plate and a circuit board. The attachment plate includes a plurality of motor attachment portions and a base portion arranged to interconnect the motor attachment portions. The circuit board is arranged on an upper surface of the base portion and includes a first area to which electronic parts are attached. The upper surfaces of the motor attachment portions are arranged higher than the upper surface of the base portion. The height of the upper surface of the circuit board in the first area is substantially equal to or greater than the height of the upper surfaces of the motor attachment portions.

摘要翻译： 无刷电动机包括基本平坦的附接板和电路板。 附接板包括多个马达安装部和布置成互连马达安装部的基部。 电路板设置在基部的上表面上，并且包括附接有电子部件的第一区域。 马达安装部分的上表面布置成高于基部的上表面。 第一区域中电路板的上表面的高度基本上等于或大于马达安装部分的上表面的高度。

公开(公告)号：US20090096303A1

公开(公告)日：2009-04-16

申请号：US12252483

申请日：2008-10-16

申请人： Hitoshi TAKAKI ,  Shigeo HAYASHI ,  Yusuke IWAI ,  Nobuaki YASUMOTO ,  Yosuke KAWANO

发明人： Hitoshi TAKAKI ,  Shigeo HAYASHI ,  Yusuke IWAI ,  Nobuaki YASUMOTO ,  Yosuke KAWANO

IPC分类号： H02K7/09

CPC分类号： H02K7/09 ,  G11B19/2009 ,  H02K7/085 ,  H02K21/22 ,  H02N13/00

摘要： A motor includes a rotating body including a magnet, and a fixed body including a stator. The stator includes a stator core having an annular core back portion with an upper and a lower surface, and a plurality of circumferentially spaced-apart tooth portions extending from the core back portion in a direction away from the rotational axis, and a plurality of coils provided by winding a conductive wire around the tooth portions of the stator core with multiple turns. The rotor holder is arranged axially above the stator to cover the stator. Further, an annular or arc-shaped attracting magnet arranged to attract the rotor holder toward the stator is arranged radially inwardly of the core back portion, the attracting magnet having an upper surface axially facing toward the rotor holder, and a lower surface arranged axially below the upper surface of the core back portion of the stator core.

摘要翻译： 电动机包括具有磁体的旋转体和具有定子的固定体。 定子包括具有上下表面的环形芯背部的定子芯和从远离旋转轴线的方向从芯背部延伸的多个周向间隔开的齿部，以及多个线圈 通过绕多个匝的定子芯的齿部部分缠绕导电线来提供。 转子保持器轴向地布置在定子上方以覆盖定子。 此外，设置成将转子保持器朝向定子吸引的环形或弧形吸引磁体布置在芯部后部的径向内侧，吸引磁体具有轴向面向转子保持器的上表面，并且下表面轴向地布置 定子芯的芯部后部的上表面。

公开(公告)号：US20090146598A1

公开(公告)日：2009-06-11

申请号：US12328001

申请日：2008-12-04

申请人： Shigeo HAYASHI ,  Yosuke KAWANO ,  Satoshi KOMATSU

发明人： Shigeo HAYASHI ,  Yosuke KAWANO ,  Satoshi KOMATSU

IPC分类号： H02P6/18

CPC分类号： H02P6/18 ,  Y10S388/923

摘要： A brushless motor driven by a sensorless driving circuit includes a rotating body capable of being rotated about a center axis; a rotor magnet arranged coaxially with the rotating body; a stator disposed opposite the rotor magnet; and at least one coil wound around the stator. The brushless motor is driven according to a signal containing a third harmonic component relative to a fundamental wave component in an induced electromotive force. Further, an amplitude ratio of the third harmonic component to the fundamental wave component in the induced electromotive force generated in the coil preferably is about 1% or higher.

摘要翻译： 由无传感器驱动电路驱动的无刷电动机包括能够围绕中心轴旋转的旋转体; 与旋转体同轴设置的转子磁体; 与转子磁体相对设置的定子; 以及缠绕在定子上的至少一个线圈。 根据感应电动势中相对于基波分量的三次谐波分量的信号来驱动无刷电动机。 此外，在线圈中产生的感应电动势中的三次谐波分量与基波分量的振幅比优选为约1％以上。