公开(公告)号：US06335582B1

公开(公告)日：2002-01-01

申请号：US09060107

申请日：1998-04-15

申请人： Toshimi Abukawa ,  Kazuo Ohnishi ,  Hideaki Suzuki ,  Hitoshi Ishii ,  Keiichi Abe

发明人： Toshimi Abukawa ,  Kazuo Ohnishi ,  Hideaki Suzuki ,  Hitoshi Ishii ,  Keiichi Abe

IPC分类号： H02K2112

CPC分类号： H02K29/08 ,  H02K1/146 ,  H02K3/38 ,  H02K3/493 ,  H02K3/522 ,  H02K5/1732 ,  H02K16/04 ,  H02K21/16 ,  H02K2203/12

摘要： A permanent-magnet electric rotating machine with a concentrated winding stator, including a stator having a plurality of stator magnetic poles formed so as to extend radially from an annular yoke portion of a stator iron core, and windings mounted on the stator magnetic poles; and a rotor having a permanent magnet with a plurality of magnetic poles and rotatably held so as to face the stator through an air gap; wherein each of the stator magnetic poles has a straight shape having a width which is made constant over a whole length, small grooves are formed in each of the stator magnetic poles in symmetrical positions on opposite sides and near a top end portion of the stator magnetic pole, a bottom portion of each slot portion defined by adjacent ones of the stator magnetic poles and the yoke is formed triangularly, each of the stator winding is constituted so that a winding having a predetermined number of turns and winding being formed so as to be fittable to each of the stator magnetic poles is mounted on the stator magnetic pole through an insulator, and wedges are fitted to the small grooves formed in the stator magnetic poles.

摘要翻译： 一种具有集中绕组定子的永磁式电动旋转机械，具有定子，该定子具有形成为从定子铁芯的环形磁轭部分径向延伸的多个定子磁极和安装在定子磁极上的绕组; 以及转子，具有具有多个磁极的永久磁铁，并且通过气隙可旋转地保持为与定子相对; 其中每个定子磁极具有在整个长度上恒定的宽度的直线形状，在每个定子磁极中在对置的位置上形成小的凹槽，并且在定子磁体的顶端附近 由相邻的定子磁极和磁轭限定的每个槽部的底部形成为三角形，每个定子绕组构成为具有预定匝数和绕组的绕组形成为 每个定子磁极配合，通过绝缘体安装在定子磁极上，并将楔形装配到形成在定子磁极中的小凹槽上。

公开(公告)号：US06784590B2

公开(公告)日：2004-08-31

申请号：US10108837

申请日：2002-03-28

申请人： Kazuo Ohnishi ,  Toshimi Abukawa ,  Tokio Sekiguchi

发明人： Kazuo Ohnishi ,  Toshimi Abukawa ,  Tokio Sekiguchi

IPC分类号： H02K2112

CPC分类号： H02K29/03

摘要： A permanent magnet motor comprising a permanent magnet and an armature having a plurality of winding grooves facing the permanent magnet with an air gap therebetween. The armature has a plurality of auxiliary grooves on a magnetic pole surface thereof, wherein a composite of two vectors of cogging torque generated by the auxiliary grooves is deviated by 180° or 120° from a vector of cogging torque generated by the winding grooves in the sixth harmonic plane, and wherein a width of a portion of an air gap magnetic flux density waveform that includes a value that is more than 90% of a peak value of the air gap magnetic flux density waveform is less than 80% or 86% of a width of a pole pitch portion of the air gap magnetic flux density waveform. Each vector of cogging torque generated by each of the plurality of auxiliary grooves is deviated by 180° or 120° from a vector of cogging torque generated by the winding grooves in the sixth harmonic plane, respectively, and wherein a width of a portion of an air gap magnetic flux density waveform that includes a value that is more than 90% of a peak value of the air gap magnetic flux density waveform is less than 80% or 86% of a width of a pole pitch portion of the air gap magnetic flux density waveform.

摘要翻译： 一种永磁电动机，包括永磁体和电枢，所述电枢具有面对永磁体的多个绕组槽，其间具有气隙。 电枢在其磁极表面上具有多个辅助槽，其中由辅助槽产生的齿槽转矩的两个矢量的复合体与由绕组槽中产生的齿槽转矩的矢量偏离180°或120° 并且其中，包括大于气隙磁通密度波形的峰值的90％的值的气隙磁通密度波形的一部分的宽度小于气隙磁通密度波形的峰值的90％或86％ 气隙磁通密度波形的极间距部分的宽度。 由多个辅助槽中的每一个产生的每个齿槽转矩的矢量分别与由六次谐波平面中的绕组槽产生的齿槽转矩的矢量偏离180°或120°，其中， 包含大于气隙磁通密度波形的峰值的90％的值的气隙磁通密度波形小于气隙磁通量的极间距部分的宽度的80％或86％ 密度波形。

公开(公告)号：US06731027B2

公开(公告)日：2004-05-04

申请号：US10082000

申请日：2002-02-22

申请人： Kazuo Ohnishi ,  Toshimi Abukawa ,  Masafumi Sakamoto ,  Koki Isozaki

发明人： Kazuo Ohnishi ,  Toshimi Abukawa ,  Masafumi Sakamoto ,  Koki Isozaki

IPC分类号： H02K3714

CPC分类号： H02K37/18

摘要： A three-phase hybrid type stepping motor of the present invention comprises a stator, a rotor arranged concentrically with the stator and with an air gap therebetween, six stator poles extending radially and formed at a regular pitch on the inner peripheral surface of an annular stator yoke, each of the stator poles having a plurality of small stator teeth at the tip end thereof, the rotor having two splitted rotor elements and a permanent magnet held therebetween and magnetized so as to form N and S poles in the axial direction thereof, fifty of small rotor teeth formed at a regular pitch on the outer peripheral surface of each of the rotor elements, the two splitted rotor elements being shifted from each other in angular position by a ½ pitch of the small rotor teeth, wherein a permeance distribution of the small stator teeth is a vernier pitch balanced by a six or three order harmonic wave, and a ratio of the width of the pole tooth to the rotor teeth pitch is set to 0.35-0.45.

摘要翻译： 本发明的三相混合型步进电动机包括一个定子，一个与定子同心设置的转子和一个气隙，六个定子极径向延伸并以一定间距形成在环形定子的内周面上 磁轭，每个定子极在其顶端具有多个小的定子齿，转子具有两个分离的转子元件和永久磁铁，并被磁化以在其轴向上形成N和S极，五十 在每个转子元件的外周表面上以规则间距形成的小转子齿，两个分离的转子元件在角位置彼此偏移小转子齿的1/2间距，其中， 小定子齿是通过六阶或三阶谐波平衡的游标间距，极齿与转子齿间距的比率设定为0.35-0.45。

公开(公告)号：US06313558B1

公开(公告)日：2001-11-06

申请号：US09546885

申请日：2000-04-10

申请人： Toshimi Abukawa ,  Kazuo Ohnishi ,  Yuji Takagai ,  Sachio Hatori ,  Kiyomichi Inoshita

发明人： Toshimi Abukawa ,  Kazuo Ohnishi ,  Yuji Takagai ,  Sachio Hatori ,  Kiyomichi Inoshita

IPC分类号： H02K2122

CPC分类号： H02K29/03

摘要： An electric rotary machine has a concentrated winding stator and a rotor facing the stator with a gap therebetween. The stator has M number of stator magnetic poles extending in the radial direction from an annular yoke, pole pieces each extending in the circumferential direction of the rotor from the tip end of each of the stator magnetic poles, and windings wound around the stator magnetic poles. The rotor having a permanent magnet with P number magnetic poles, wherein P:M=6n−2:6n, or P:M=6n+2:6n, where n is an integer not less than 2, and the figure of each of the pole pieces is so determined that a gap formed between the pole piece and the rotor is increased going toward the both ends of the pole piece.

摘要翻译： 电动旋转机具有集中绕组定子和面向定子的转子，其间具有间隙。 定子具有从环形磁轭沿径向延伸的M个定子磁极，从每个定子磁极的前端沿着转子的圆周方向延伸的极片，以及缠绕在定子磁极上的绕组 。 转子具有P数磁极的永磁体，其中P：M = 6n-2：6n，或P：M = 6n + 2：6n，其中n是不小于2的整数， 极片被确定为在极靴和转子之间形成的间隙增加朝向极靴的两端。

公开(公告)号：US06633105B2

公开(公告)日：2003-10-14

申请号：US10104864

申请日：2002-03-22

申请人： Kazuo Ohnishi ,  Masafumi Sakamoto ,  Noriyoshi Kikuchi

发明人： Kazuo Ohnishi ,  Masafumi Sakamoto ,  Noriyoshi Kikuchi

IPC分类号： H02K3700

CPC分类号： H02K37/14 ,  H02K1/146

摘要： A permanent magnet motor having a stator and a permanent magnet rotor facing the stator with a gap therebetween, the stator having a plurality of stator magnetic poles extending radially toward a peripheral surface of the rotor, s number of small stator teeth formed on a tip end of each of the magnetic poles, and exciting windings of m phases wound around the stator magnetic poles. The rotor having a cylindrical permanent magnet having pieces of N pole and pieces of S pole arranged alternately in a peripheral direction thereof at equal pitches, wherein a pitch of the small stator teeth is 1±1/(2ms) times larger than a pitch of the rotor magnetic pole pairs. The width of the small stator tooth is 37˜47% of the magnetic pole pitch. A depth of the groove formed between the adjacent small stator teeth is more than 15 times larger than the length of the air gap between the stator and the rotor.

摘要翻译： 一种永磁电动机，其具有定子和与定子相对的定子的永久磁铁转子，其间具有间隙，所述定子具有径向朝向所述转子的周面延伸的多个定子磁极，形成在前端的多个小定子齿 的每个磁极和缠绕在定子磁极上的m相的励磁绕组。 转子具有圆柱形永磁体，其圆柱形永磁体具有N极和S极片，其圆周方向以相等的间距交替布置，其中小定子齿的间距是比1的间距大1±1 /（2ms）倍 转子磁极对。 小定子齿的宽度为磁极间距的37〜47％。 在相邻的小定子齿之间形成的槽的深度比定子和转子之间的气隙的长度大15倍以上。

公开(公告)号：US06548923B2

公开(公告)日：2003-04-15

申请号：US09821693

申请日：2001-03-29

申请人： Kazuo Ohnishi ,  Masafumi Sakamoto ,  Koki Isozaki

发明人： Kazuo Ohnishi ,  Masafumi Sakamoto ,  Koki Isozaki

IPC分类号： H02K3700

CPC分类号： H02K37/18

摘要： The permeance between the small teeth provided on the stator magnetic pole and the rotor magnetic pole may be varied regularly according to the rotation of the rotor. The small stator teeth provided on the tip end of each stator magnetic pole are divided into sets of two or three small stator teeth and at least one pitch of the adjacent teeth is different from the other pitch of the other adjacent teeth, so that the vector sum of the quaternary harmonics of permeance in each set is substantially zero. The small stator teeth formed on the tip end of the stator pole are composed of two sets of three small stator teeth, and at least one pitch of the adjacent teeth is different from the other pitch of the other adjacent teeth, so that a vector sum of the tertiary harmonics of permeance of the three small stator teeth included in each of sets becomes substantially zero, and that a vector sum of permeances of axialsymmetric two small stator teeth on the quaternary harmonic plane of two sets becomes substantially zero.

摘要翻译： 设置在定子磁极上的小齿与转子磁极之间的磁导可以根据转子的旋转而规则地变化。 设置在每个定子磁极的尖端上的小定子齿被分成两个或三个小定子齿的组，并且相邻齿的至少一个间距不同于其他相邻齿的另一个间距，使得矢量 每组中磁导率的四次谐波之和基本为零。 形成在定子极的前端上的小定子齿由两组三个小定子齿组成，并且相邻齿的至少一个间距不同于另一个相邻齿的另一个间距，使得矢量和 包含在每组中的三个小定子齿的三次谐波的三次谐波变得基本为零，并且两组的四次谐波平面上的轴对称两个小定子齿的磁导的矢量和变为基本为零。

公开(公告)号：US5430373A

公开(公告)日：1995-07-04

申请号：US9267

申请日：1993-01-22

申请人： Misao Ichikawa ,  Kazuo Ohnishi ,  Tokio Sekiguchi

发明人： Misao Ichikawa ,  Kazuo Ohnishi ,  Tokio Sekiguchi

IPC分类号： G01D5/14 ,  G01D5/16 ,  G01D5/249 ,  G01B7/30

CPC分类号： G01D5/145 ,  G01D5/2497

摘要： An absolute encoder wherein tracks are arranged side-by-side on a magnetic drum in the axial direction thereof, and absolute patterns of circulatory random sequence codes are divided and recorded on the tracks, respectively. An additional track for generating sinewaves of two phases in synchronism with the reading of the absolute patterns is provided on the magnetic drum, so that an output can be obained by combining a coarse value of an absolute position obtained from the tracks and a fine value of an absolute position obtained from the additional track. The absolute patterns are detected from the two tracks recorded on the magnetic drum by magnetic resistive elements connected with each other to form circuits each having a three-terminal. Terminals of the magnetic resistive elements are connected through a common line with an electric power source in order to prevent the lines from being crossed.

摘要翻译： 其中轨道在磁鼓的轴向方向上并排设置的绝对编码器，并且循环随机序列码的绝对图案分别被分割并记录在轨道上。 在磁鼓上设置有用于与绝对图案的读取同步地产生两相正弦波的附加轨道，从而可以通过将从轨道获得的绝对位置的粗略值与 从附加轨道获得的绝对位置。 通过彼此连接的磁阻元件从记录在磁鼓上的两个轨迹检测绝对图案，以形成各自具有三端的电路。 磁阻元件的端子通过与电源的公共线连接，以防止线交叉。

公开(公告)号：US07250698B2

公开(公告)日：2007-07-31

申请号：US11260535

申请日：2005-10-27

申请人： Kazuo Ohnishi ,  Shoji Ohiwa ,  Yasuaki Motegi ,  Yuji Enomoto

发明人： Kazuo Ohnishi ,  Shoji Ohiwa ,  Yasuaki Motegi ,  Yuji Enomoto

IPC分类号： H02K37/14

CPC分类号： H02K37/14 ,  H02K2201/12

摘要： A two-phase or three-phase claw-pole type rotary machine comprises two or three coaxially arranged single phase rotary machine elements. Each of the rotary machine elements has a magnet rotor, a claw-pole type stator, and an annular stator winding. Claw poles of the stator are divided into a plurality of blocks and are circumferentially separated from one another. A distance between adjacent claw poles of the same polarity in each block is (β0−Δβ), substantially, where β0 is a reference pitch when the claw poles of the same polarity are arranged equidistantly apart from one another in a range of 360°, Δβ is π/2q, or π/3q and q is a number of claw poles of the same polarity in each block. The first and second rotary machine elements are circumferentially shifted from each other by 90° or 120°.

摘要翻译： 两相或三相爪极式旋转机械包括两个或三个同轴布置的单相旋转机械元件。 每个旋转机械元件具有磁体转子，爪极型定子和环形定子绕组。 定子的爪极被分成多个块，并且彼此沿周向分离。 在每个块中相同极性的相邻爪极之间的距离基本上是（β-0-Deltabeta），其中β0是在 相同的极性在360°的范围内彼此等距离排列，Deltabeta是pi / 2q或pi / 3q，q是每个块中具有相同极性的爪极数。 第一和第二旋转机械元件彼此周向地偏移90°或120°。

公开(公告)号：US06552453B2

公开(公告)日：2003-04-22

申请号：US09861706

申请日：2001-05-22

申请人： Shoji Ohiwa ,  Kazuo Ohnishi ,  Atushi Yamamoto ,  Shinji Shimizu ,  Youji Unoki ,  Yukinori Kurita

发明人： Shoji Ohiwa ,  Kazuo Ohnishi ,  Atushi Yamamoto ,  Shinji Shimizu ,  Youji Unoki ,  Yukinori Kurita

IPC分类号： H02K700

CPC分类号： H02K29/08 ,  H02K37/18

摘要： The magnetic pole position detector for an electric motor comprises a detection rotor, a detection stator, and magnetic flux concentration tips and magneto electro transducers. The detection rotor is fixed to an axis of rotation of the motor and comprised of disc-like rotors having first toothlike protrusions and a permanent magnet. The disc-like rotors are assembled so as to make the first toothlike protrusions coincide in the axial direction and the permanent magnet is fixed between the disc-like rotors. The detection stator is comprised of stator cores comprised of an annular yoke and stator teeth formed at regular intervals on the former. Second toothlike protrusions are formed on the inner end of the stator teeth. The stator cores are assembled with a gap in the axial direction so as to make respective second toothlike protrusions coincide in the axial direction. The magnetic flux concentration tips and the magneto electro transducers are placed in the gaps in the axial direction. The detection rotor and the detection stator are assembled with a gap in the radial direction. The magnetic pole position is obtained by detecting the magnetic flux flowing through the stator teeth that varies in accordance the rotation of the detection rotor.

公开(公告)号：US07385321B2

公开(公告)日：2008-06-10

申请号：US11561688

申请日：2006-11-20

申请人： Kazuo Ohnishi ,  Shoji Ohiwa ,  Yasuaki Motegi

发明人： Kazuo Ohnishi ,  Shoji Ohiwa ,  Yasuaki Motegi

IPC分类号： H02K37/04

CPC分类号： H02K37/18 ,  H02K37/20

摘要： A multi-polar rotary machine comprises a cylindrical outer rotor arranged concentrically with the stator and with an air gap therebetween. The stator has two spaced stator elements and a ring shaped permanent magnet held between the stator elements and magnetized so as to form N and S poles in the axial direction of the stator. Small axially separated stator teeth A and Ā and B and B are formed on the outer peripheral surface of the spaced stator elements. Stator windings for A phase and B phase are wound around the respective stator elements. The small stator teeth A, Ā, B and B are circumferentially shifted from corresponding small rotor teeth by a ¼ pitch of the small stator teeth, respectively. Each of the stator and rotor is formed of pressed powder comprising a soft magnetic material at least one of a resin and an inorganic material.

摘要翻译： 多极旋转机器包括与定子同心地布置并在其间具有气隙的圆柱形外转子。 定子具有两个间隔开的定子元件和固定在定子元件之间并被磁化的环形永磁体，以便在定子的轴向上形成N极和S极。 在间隔开的定子元件的外周面上形成小轴向分离的定子齿A和A以及 B和B分别从相应的小转子齿周向地移位小定子齿的1/4间距。 定子和转子中的每一个由包括由至少一种树脂和无机材料构成的软磁性材料的压制粉末形成。