公开(公告)号：US08373324B2

公开(公告)日：2013-02-12

申请号：US12742622

申请日：2008-11-27

申请人： Kiyotaka Nishijima

发明人： Kiyotaka Nishijima

IPC分类号： H02K1/22 ,  H02K1/27 ,  H02K21/14

CPC分类号： H02K1/2766

摘要： A field element core includes field magnet through holes and coupling part. The field magnet through holes are circularly disposed in a peripheral direction around a predetermined direction and are adjacent to each other in the peripheral direction to form a set. The field magnet through holes forming the same pair both extend along a given direction that is defined for each pair, when viewed from the predetermined direction. The coupling part 11 is provided between the field magnet through holes forming the same set and has ends as lateral surfaces, respectively. The entire lateral surfaces of the coupling part are curved to form a concave shape. Specifically, viewed from the predetermined direction, only at a given position between both ends of the lateral surface, a tangent of the lateral surface extends along an extending direction of the coupling part. The same holds true for the lateral surface.

摘要翻译： 场元件芯包括场磁通孔和耦合部分。 磁场通孔围绕预定方向在圆周方向上圆周地设置，并且在圆周方向上彼此相邻以形成一组。 当从预定方向观察时，形成相同对的场磁体通孔沿沿着给定方向限定的给定方向延伸。 耦合部分11设置在形成相同组的场磁体通孔之间，并且分别具有作为侧表面的端部。 连接部分的整个侧表面是弯曲的以形成凹形。 具体地，从预定方向看，仅在侧面的两端之间的给定位置处，侧面的切线沿联接部的延伸方向延伸。 对于侧面也是如此。

公开(公告)号：US07786641B2

公开(公告)日：2010-08-31

申请号：US11885161

申请日：2006-02-01

申请人： Kiyotaka Nishijima

发明人： Kiyotaka Nishijima

IPC分类号： H02K1/27

CPC分类号： H02K1/276 ,  H02K29/03

摘要： In the present invention, since gaps respectively provided at one ends of a field magnet through-hole respectively extend toward the other ends passing on the side of a periphery with respect to the field magnet through-hole, the radial dimension of the magnetic member in this portion can be made smaller than the center of magnetic poles, so that the difference in thickness of the magnetic member in the radial direction between the border of magnetic poles and the magnetic poles can be reduced. Accordingly, the asymmetry of the configuration of a rotor is not absolutely necessary, and the outer surface does not need to be depressed for reducing the torque ripple.

摘要翻译： 在本发明中，由于分别设置在场磁铁贯通孔的一端的间隙分别相对于场磁铁通孔在周边的另一端延伸，所以磁性体的径向尺寸在 该部分可以制成小于磁极的中心，从而能够减小磁极的边界与磁极之间的径向方向上的磁性部件的厚度差。 因此，转子的结构的不对称性并不是绝对必要的，为了减小转矩波动，不需要压下外表面。

公开(公告)号：US07579733B2

公开(公告)日：2009-08-25

申请号：US10562915

申请日：2004-07-05

申请人： Keiji Aota ,  Kiyotaka Nishijima ,  Akio Yamagiwa

发明人： Keiji Aota ,  Kiyotaka Nishijima ,  Akio Yamagiwa

IPC分类号： H02K5/24

CPC分类号： H02K1/276 ,  H02K1/2766

摘要： A motor has a rotor core with a plurality of first non-magnetic layers and a plurality of second non-magnetic layers. The rotor core has a plurality of magnets. The first and second non-magnetic layers are positioned to cancel n-th order harmonics. Therefore, a specific order, for example 5-th order and 7-th order, harmonics component of a magnetic flux distribution waveform (induction voltage waveform) is reduced and unnecessary radial force and thrust force is prevented from occurrence, while sufficient magnetic flux is maintained.

摘要翻译： 电动机具有具有多个第一非磁性层和多个第二非磁性层的转子铁芯。 转子芯具有多个磁体。 第一和第二非磁性层定位成抵消n次谐波。 因此，通过减小磁通分布波形（感应电压波形）的特定顺序，例如5阶，7阶的谐波分量，并且防止不必要的径向力和推力发生，同时充分的磁通量为 保持。

公开(公告)号：US20090206691A1

公开(公告)日：2009-08-20

申请号：US12428561

申请日：2009-04-23

申请人： Keiji AOTA ,  Kiyotaka NISHIJIMA ,  Akio YAMAGIWA

发明人： Keiji AOTA ,  Kiyotaka NISHIJIMA ,  Akio YAMAGIWA

IPC分类号： H02K1/27 ,  H02K21/12

CPC分类号： H02K1/276 ,  H02K1/2766

摘要： A motor includes a rotor core, permanent magnets and non-magnetic layers. The permanent magnets are embedded in the rotor core with each of the permanent magnets defining a pole of the rotor having a pole center and a peripheral edge section, with the peripheral edge section located in a vicinity between the poles and a vicinity of the rotor surface. The non-magnetic layers are located in a vicinity of the rotor surface at a pole center side position with respect to the peripheral edge section of each of the permanent magnets. The peripheral edge sections and the non-magnetic layers are positioned to cancel 5-th or 7-th order harmonics of an induction voltage. The poles are disposed at every approximately constant interval, varying in a constant angle. The peripheral edge sections and the non-magnetic layers are independent from one another, and the rotor core is interposed between them.

摘要翻译： 电动机包括转子芯，永磁体和非磁性层。 永磁体被嵌入在转子铁心中，每个永磁体限定具有极中心和周边边缘部分的转子的极，其中周边部分位于极之间和转子表面附近 。 非磁性层位于相对于每个永磁体的周边部的极中心侧位置处的转子表面附近。 外围边缘部分和非磁性层被定位成抵消感应电压的第五或七阶谐波。 极以每个近似恒定的间隔设置，以恒定角度变化。 外围边缘部分和非磁性层彼此独立，并且转子芯体介于它们之间。

公开(公告)号：US20090152972A1

公开(公告)日：2009-06-18

申请号：US11885161

申请日：2006-02-01

申请人： Kiyotaka Nishijima

发明人： Kiyotaka Nishijima

IPC分类号： H02K21/16

CPC分类号： H02K1/276 ,  H02K29/03

摘要： In the present invention, since gaps respectively provided at one ends of a field magnet through-hole respectively extend toward the other ends passing on the side of a periphery with respect to the field magnet through-hole, the radial dimension of the magnetic member in this portion can be made smaller than the center of magnetic poles, so that the difference in thickness of the magnetic member in the radial direction between the border of magnetic poles and the magnetic poles can be reduced. Accordingly, the asymmetry of the configuration of a rotor is not absolutely necessary, and the outer surface does not need to be depressed for reducing the torque ripple.

摘要翻译： 在本发明中，由于分别设置在场磁铁贯通孔的一端的间隙分别相对于场磁铁通孔在周边的另一端延伸，所以磁性体的径向尺寸在 该部分可以制成小于磁极的中心，从而能够减小磁极的边界与磁极之间的径向方向上的磁性部件的厚度差。 因此，转子的结构的不对称性并不是绝对必要的，为了减小转矩波动，不需要压下外表面。

公开(公告)号：US07119507B2

公开(公告)日：2006-10-10

申请号：US10536305

申请日：2003-11-28

申请人： Kiyotaka Nishijima

发明人： Kiyotaka Nishijima

IPC分类号： H02P1/18

CPC分类号： H02K1/276 ,  H02K29/03

摘要： A brushless DC motor has a stator and a rotor. An angle θ0 between an edge section of the flux barrier on a magnetic pole center side and an edge section on a side for coming in contact with the rib of adjacent flux barrier, with respect to the rotor center, is determined to be equal to or greater than an angle satisfying a following relationship θ0=180°*m/(Pn*f/f0) (provided 2θ0−θr

摘要翻译： 无刷直流电动机具有定子和转子。 在磁极中心侧的磁通屏障的边缘部分与用于与相邻的磁通屏障的肋接触的一侧的边缘部分之间的角度θ0 <0>相对于转子中心 被确定为等于或大于满足以下关系的角度<？in-line-formula description =“In-line Formulas”end =“lead”？>θ0 = 180° * m /（Pn * f / f 0 <0）（提供第2θ<0 <90°） description =“在线公式”end =“tail”？>其中，用f表示要减小的振动频率，用Pn表示极对数，电频率用f 0 = Pn * N，电动机转数用N表示，m = 1,3,5。 。 。 相对于转子中心的肋的角度由θ表示，因此电动机的高效率和马达声学噪声的降低被应对。

公开(公告)号：US20060145556A1

公开(公告)日：2006-07-06

申请号：US10562915

申请日：2004-07-05

申请人： Keiji Aota ,  Kiyotaka Nishijima ,  Akio Yamagiwa

发明人： Keiji Aota ,  Kiyotaka Nishijima ,  Akio Yamagiwa

IPC分类号： H02K5/24 ,  H02K21/12 ,  H02K1/27

CPC分类号： H02K1/276 ,  H02K1/2766

摘要： A motor has a rotor core with a plurality of first non-magnetic layers and a plurality of second non-magnetic layers. The rotor core has a plurality of magnets. The first and second non-magnetic layers are positioned to cancel n-th order harmonics. Therefore, a specific order, for example 5-th order and 7-th order, harmonics component of a magnetic flux distribution waveform (induction voltage waveform) is reduced and unnecessary radial force and thrust force is prevented from occurrence, while sufficient magnetic flux is maintained.

公开(公告)号：US5739650A

公开(公告)日：1998-04-14

申请号：US619460

申请日：1996-03-25

申请人： Taizou Kimura ,  Kiyotaka Nishijima ,  Hiroyuki Yamai ,  Akio Yamagiwa ,  Kazunobu Ooyama ,  Nobuki Kitano

发明人： Taizou Kimura ,  Kiyotaka Nishijima ,  Hiroyuki Yamai ,  Akio Yamagiwa ,  Kazunobu Ooyama ,  Nobuki Kitano

IPC分类号： H02P6/08 ,  H02P6/16

CPC分类号： H02P6/187 ,  H02P6/08 ,  H02P6/085 ,  H02P6/17 ,  H02P2209/07

摘要： In a brushless DC motor system, an RMS value of an input current of a voltage-fed inverter (702) is detected by a current transformer (705) and an RMS value detector circuit (706). A rotation speed of a brushless DC motor (703) is detected based on a cycle of a position signal outputted by a position sensor circuit (704). Then, in response to the RMS value of the input current and the rotation speed, the phase of the inverter output voltage relative to the phase of the motor counter-electromotive voltage is set to a phase at which the motor efficiency comes generally to a peak, and a switching command to the voltage-fed inverter (702) is generated. With this constitution, when the applied voltage waveform is controlled only by the voltage-fed inverter in response to the rotor-position detection signal, the motor attains high-efficiency operation without involving any increase in cost and yet regardless of load conditions.

摘要翻译： PCT No.PCT / JP95 / 01468 Sec。 371日期：1996年3月25日 102（e）1996年3月25日PCT提交1995年7月24日PCT公布。 公开号WO96 / 03797 日期1996年2月8日在无刷直流电动机系统中，通过电流互感器（705）和RMS值检测器电路（706）检测电压反相器（702）的输入电流的RMS值。 基于由位置传感器电路（704）输出的位置信号的周期来检测无刷直流电动机（703）的转速。 然后，响应于输入电流的RMS值和转速，逆变器输出电压相对于电动机反电动势的相位的相位被设定为电动机效率通常达到峰值的阶段 并且产生到电压逆变器（702）的切换命令。 利用这种结构，当施加的电压波形仅根据转子位置检测信号由电压逆变器控制时，马达实现高效率运行，而不涉及成本的任何增加，而不管负载条件如何。

公开(公告)号：US07777382B2

公开(公告)日：2010-08-17

申请号：US12428561

申请日：2009-04-23

申请人： Keiji Aota ,  Kiyotaka Nishijima ,  Akio Yamagiwa

发明人： Keiji Aota ,  Kiyotaka Nishijima ,  Akio Yamagiwa

IPC分类号： H02K5/24

CPC分类号： H02K1/276 ,  H02K1/2766

摘要： A motor includes a rotor core, permanent magnets and non-magnetic layers. The permanent magnets are embedded in the rotor core with each of the permanent magnets defining a pole of the rotor having a pole center and a peripheral edge section, with the peripheral edge section located in a vicinity between the poles and a vicinity of the rotor surface. The non-magnetic layers are located in a vicinity of the rotor surface at a pole center side position with respect to the peripheral edge section of each of the permanent magnets. The peripheral edge sections and the non-magnetic layers are positioned to cancel 5-th or 7-th order harmonics of an induction voltage. The poles are disposed at every approximately constant interval, varying in a constant angle. The peripheral edge sections and the non-magnetic layers are independent from one another, and the rotor core is interposed between them.

摘要翻译： 电动机包括转子芯，永磁体和非磁性层。 永磁体被嵌入在转子铁心中，每个永磁体限定具有极中心和周边边缘部分的转子的极点，周边部分位于极点附近和转子表面附近 。 非磁性层位于相对于每个永磁体的周边部分的极中心侧位置处的转子表面附近。 外围边缘部分和非磁性层被定位成抵消感应电压的第五或七阶谐波。 极以每个近似恒定的间隔设置，以恒定角度变化。 外围边缘部分和非磁性层彼此独立，并且转子芯体介于它们之间。

公开(公告)号：US20090102306A1

公开(公告)日：2009-04-23

申请号：US12226914

申请日：2007-05-21

申请人： Kiyotaka Nishijima

发明人： Kiyotaka Nishijima

IPC分类号： H02K21/14

CPC分类号： H02K1/276

摘要： A field element core has field magnet through holes and connecting portions. The field magnet through holes are circumferentially arranged in a circumferential direction around a given direction, and are adjacent each other in the circumferential direction to form pairs. Seen from the given direction, field magnet through holes forming the same pair both extend along a certain one direction determined for each pair. A connecting portion is provided between the field magnet through holes of the same pair, and has the ends as its sides. The sides of the connecting portion are curved in a concave shape as a whole. Specifically, seen from the given direction, a tangent to the side is along the direction of extension of the connecting portion only at a certain one position between both ends of the side. The same holds true for the side.

摘要翻译： 场元件芯具有场磁铁通孔和连接部分。 磁场通孔围绕给定的方向沿圆周方向周向布置，并且在圆周方向上彼此相邻以形成对。 从给定方向看，形成同一对的场磁体通孔沿着每对确定的某一方向延伸。 连接部设置在同一对的场磁铁通孔之间，其端部为两侧。 连接部分的侧面作为整体弯曲成凹形。 具体地，从给定方向看，侧面的切线仅在连接部分的延伸方向上仅在侧面两端之间的某一位置。 这一点也是如此。