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公开(公告)号：US07474027B2
公开(公告)日：2009-01-06
申请号：US10542375
申请日：2003-01-15
IPC分类号： H02K1/27
CPC分类号： H02K1/276
摘要： A permanent magnet motor 1 includes a rotor in which permanent magnets 31 are fixed. In the rotor 20, the outer peripheral shape of rotor magnetic-pole portions 24 is formed so that, in the circumferentially central portion, the distance from the center of the rotor iron core 21 is longest, and, at the inter-polar space, the distance from the center of the rotor iron core is shortest, and so that the outermost surface of the rotor magnetic-pole portions 24 forms an arc, and given that sheath thickness tc formed by the outer-side surface of each permanent magnet 31 and the outermost surface of each rotor magnetic-pole portion 24 is practically constant, and letting the thickness of the permanent magnets be the magnet thickness tm, then the relation tc/tm≦0.25 is satisfied.
摘要翻译： 永磁电动机1包括固定永磁体31的转子。 在转子20中，转子磁极部24的外周形状形成为在圆周方向的中心部从转子铁芯21的中心的距离最长的位置，在极间空间处， 从转子铁芯的中心的距离最短，转子磁极部分24的最外表面形成一个电弧，并且给定由每个永磁体31的外侧表面形成的护套厚度tc和 每个转子磁极部24的最外表面几乎恒定，并且使永磁体的厚度为磁铁厚度tm，则满足关系式tc / tm <= 0.25。
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公开(公告)号：US20060244335A1
公开(公告)日：2006-11-02
申请号：US10500624
申请日：2003-04-11
CPC分类号： H02K1/278 , H02K29/03 , H02K2201/06
摘要： A permanent magnet electric motor 10 comprises a rotor 30 provided with two stages of permanent magnets in the axial direction on an outer circumferential face of a rotor iron core, and having a shaft shifted by a stage skew angle θr in electrical angle to decrease a first frequency component of cogging torque in the circumferential direction of the rotor iron core between two stages of the permanent magnets, a stator iron core 21 of cylindrical shape provided with the stator winding for producing a rotating magnetic field causing the rotor 30 to be rotated, and a stator 20 dividing the stator iron core 21 into plural blocks in the axial direction, and shifted by a stage skew angle θs in electrical angle to decrease a second frequency component of the cogging torque in the circumferential direction of the stator iron core 21.
摘要翻译： 永磁电动机10包括：转子30，其在转子铁芯的外周面上沿轴向设置有两级永磁体，并且具有以电角度偏移阶段倾斜角度的轴，以减少第一 在转子铁芯的两个阶段的永久磁铁的周向上的齿槽转矩的频率分量，具有定子绕组的圆筒形的定子铁芯21，用于产生使转子30旋转的旋转磁场，以及 定子20将定子铁芯21沿轴向分割为多个块，并且以电角度偏移台斜面角度，以减小定子铁芯21的圆周方向上的齿槽转矩的第二频率分量。
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公开(公告)号：US07067948B2
公开(公告)日：2006-06-27
申请号：US10681343
申请日：2003-10-09
CPC分类号： H02K1/278 , H02K21/16 , H02K2201/06
摘要： A permanent-magnet rotating machine includes a rotor having a rotor core carrying on a curved outer surface multiple permanent magnets arranged in two rows along an axial direction. The permanent magnets in one row are skewed from those in the other row in a circumferential direction by a row-to-row skew angle (electrical angle) θe. A stator having a tubular stator core in which the rotor disposed includes stator coils for producing a rotating magnetic field for rotating the rotor. A lower limit of the row-to-row skew angle θe larger than 30 degrees (electrical angle). A ratio of cogging torque occurring in the absence of skew to cogging torque occurring when the permanent magnets are skewed, at a row-to-row skew angle of 30 degrees is calculated based on the cogging torque ratio, the row-to-row skew angle θe, and B-H curve properties of the stator core. An upper limit of the row-to-row skew angle θe is not larger than the maximum value at which the cogging torque ratio does not exceed the calculated cogging torque ratio at 30 degrees.
摘要翻译： 永磁旋转机械包括具有转子芯的转子，转子芯沿弯曲的外表面沿着轴向布置成两排的多个永磁体。 一行中的永磁体在圆周方向上与另一排中的永磁体相互倾斜一行到一行的倾斜角（电角度）θe。 具有管状定子芯的定子，其中设置的转子包括用于产生用于旋转转子的旋转磁场的定子线圈。 行至歪斜角度θe的下限大于30度（电角度）。 根据齿槽转矩比计算出当以永久磁铁歪斜，以30度的行歪斜角度发生的倾斜不发生齿槽转矩的齿槽转矩与齿槽转矩的比率， 角度θe和BH曲线特性。 行间行偏斜角度θe的上限不大于齿槽转矩比不超过30度时的计算齿槽转矩比的最大值。
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公开(公告)号：US07405505B2
公开(公告)日：2008-07-29
申请号：US10567354
申请日：2004-08-05
IPC分类号： H02K5/04
摘要： A rotary electric machine includes a frame; a stator whose stator-slot number Ns is 12; a rotor whose rotor-pole number Np is 8, the rotor being disposed inside the stator. The frame has a frame thickness T(θ) at mechanical angle θ, with respect to a reference line that connects the inner circumferential center of the frame with an arbitrary point, other than the center, around the center that is circularly expanded in a Fourier series. The difference between the stator-slot number Ns and the rotor-pole number Np is k (=|Ns−Np|). Stress-relieving spaces and are located in portions of the frame in an arrangement that does not have 90-degree mechanical angle rotational symmetry, in such a way that the sum P of inclusion ratios for the k-th component Tk and the Np-th component TNp, which are the Fourier series expansion coefficients for the frame thickness T(θ) expressed by equation (2) P = ( T k + T N p ) / ∑ n = 0 ∞ T n × 100 [ % ] , ( 2 ) is less than 12%. According to this configuration, mechanical strength of the frame and its producibility are maintained, and cogging torque caused by magnetic-circuit distortion in an iron core generated due to the frame shape is also reduced.
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公开(公告)号：US20080106164A1
公开(公告)日：2008-05-08
申请号：US10567354
申请日：2004-08-05
IPC分类号： H02K5/04
摘要： A rotary electric machine includes a frame; a stator whose stator-slot number Ns is 12; a rotor whose rotor-pole number Np is 8, the rotor being disposed inside the stator. The frame has a frame thickness T(θ) at mechanical angle θ, with respect to a reference line that connects the inner circumferential center of the frame with an arbitrary point, other than the center, around the center that is circularly expanded in a Fourier series. The difference between the stator-slot number Ns and the rotor-pole number Np is k (=|Ns−Np|). Stress-relieving spaces are located in portions of the frame in an arrangement that does not have 90-degree mechanical angle rotational symmetry, in such a way that the sum P of inclusion ratios for the k-th component Tk and the Np-th component TNp, which are the Fourier series expansion coefficients for the frame thickness T(θ) expressed by equation (2). P = ( T k + T N p ) / ∑ n = 0 ∞ T n × 100 [ % ] ( 2 ) , is less than 12%. According to this configuration, mechanical strength of the frame and its producibility are maintained, and cogging torque caused by magnetic-circuit distortion in an iron core generated due to the frame shape is also reduced.
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公开(公告)号：US07342338B2
公开(公告)日：2008-03-11
申请号：US10500624
申请日：2003-04-11
CPC分类号： H02K1/278 , H02K29/03 , H02K2201/06
摘要： A permanent magnet electric motor 10 comprises a rotor 30 provided with two stages of permanent magnets in the axial direction on an outer circumferential face of a rotor iron core, and having a shaft shifted by a stage skew angle θr in electrical angle to decrease a first frequency component of cogging torque in the circumferential direction of the rotor iron core between two stages of the permanent magnets, a stator iron core 21 of cylindrical shape provided with the stator winding for producing a rotating magnetic field causing the rotor 30 to be rotated, and a stator 20 dividing the stator iron core 21 into plural blocks in the axial direction, and shifted by a stage skew angle θs in electrical angle to decrease a second frequency component of the cogging torque in the circumferential direction of the stator iron core 21.
摘要翻译： 永磁电动机10包括：转子30，其在转子铁芯的外周面上沿轴向设置有两级永磁体，并且具有以电角度偏移阶段倾斜角度的轴，以减少第一 在转子铁芯的两个阶段的永久磁铁的周向上的齿槽转矩的频率分量，具有定子绕组的圆筒形的定子铁芯21，用于产生使转子30旋转的旋转磁场，以及 定子20将定子铁芯21沿轴向分割为多个块，并且以电角度偏移台斜面角度，以减小定子铁芯21的圆周方向上的齿槽转矩的第二频率分量。
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公开(公告)号：US20060192456A1
公开(公告)日：2006-08-31
申请号：US11415139
申请日：2006-05-02
CPC分类号： H02K1/278 , H02K21/16 , H02K2201/06
摘要： A permanent-magnet rotating machine includes a rotor having a rotor core carrying on a curved outer surface multiple permanent magnets arranged in two rows along an axial direction. The permanent magnets in one row are skewed from those in the other row in a circumferential direction by a row-to-row skew angle (electrical angle) θe. A stator having a tubular stator core in which the rotor disposed, includes stator coils for producing a rotating magnetic field for rotating the rotor. A lower limit of the row-to-row skew angle θe larger than 30 degrees (electrical angle). A ratio, of cogging torque occurring in the absence of skew to cogging torque occurring when the permanent magnets are skewed, at a row-to-row skew angle of 30 degrees is calculated based on the cogging torque ratio, the row-to-row skew angle θe, and B-H curve properties of the stator core. An upper limit of the row-to-row skew angle θe is not larger than the maximum value at which the cogging torque ratio does not exceed the calculated cogging torque ratio at 30 degrees.
摘要翻译： 永磁旋转机械包括具有转子芯的转子，转子芯沿弯曲的外表面沿着轴向布置成两排的多个永磁体。 一行中的永磁体在圆周方向上与另一排中的永磁体相互倾斜一行到一行的倾斜角（电角度）θe。 一种具有管状定子芯的定子，其中设置有转子，包括用于产生用于旋转转子的旋转磁场的定子线圈。 行至歪斜角度θe的下限大于30度（电角度）。 根据齿槽转矩比，以行排列为基准计算在不存在倾斜的情况下发生的齿轮转矩与永久磁铁偏斜发生的齿槽转矩的比率， 倾斜角度θ和定子铁心的BH曲线特性。 行间行偏斜角度θe的上限不大于齿槽转矩比不超过30度时的计算齿槽转矩比的最大值。
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公开(公告)号：US07196445B2
公开(公告)日：2007-03-27
申请号：US11415139
申请日：2006-05-02
CPC分类号： H02K1/278 , H02K21/16 , H02K2201/06
摘要： A permanent-magnet rotating machine includes a rotor having a rotor core carrying on a curved outer surface multiple permanent magnets arranged in two rows along an axial direction. The permanent magnets in one row are skewed from those in the other row in a circumferential direction by a row-to-row skew angle (electrical angle) θe. A stator having a tubular stator core in which the rotor disposed, includes stator coils for producing a rotating magnetic field for rotating the rotor. A lower limit of the row-to-row skew angle θe larger than 30 degrees (electrical angle). A ratio, of cogging torque occurring in the absence of skew to cogging torque occurring when the permanent magnets are skewed, at a row-to-row skew angle of 30 degrees is calculated based on the cogging torque ratio, the row-to-row skew angle θe, and B-H curve properties of the stator core. An upper limit of the row-to-row skew angle θe is not larger than the maximum value at which the cogging torque ratio does not exceed the calculated cogging torque ratio at 30 degrees.
摘要翻译： 永磁旋转机械包括具有转子芯的转子，转子芯沿弯曲的外表面沿着轴向布置成两排的多个永磁体。 一行中的永磁体在圆周方向上与另一排中的永磁体相互倾斜一行到一行的倾斜角（电角度）θe。 一种具有管状定子芯的定子，其中设置有转子，包括用于产生用于旋转转子的旋转磁场的定子线圈。 行至歪斜角度θe的下限大于30度（电角度）。 根据齿槽转矩比，以行排列为基准计算在不存在倾斜的情况下发生的齿轮转矩与永久磁铁偏斜发生的齿槽转矩的比率， 倾斜角度θ和定子铁心的BH曲线特性。 行间行偏斜角度θe的上限不大于齿槽转矩比不超过30度时的计算齿槽转矩比的最大值。
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公开(公告)号：US20060131976A1
公开(公告)日：2006-06-22
申请号：US10542375
申请日：2003-01-15
IPC分类号： H02K1/27
CPC分类号： H02K1/276
摘要： A permanent magnet motor 1 includes a rotor in which permanent magnets 31 are fixed. In the rotor 20, the outer peripheral shape of rotor magnetic-pole portions 24 is formed so that, in the circumferentially central portion, the distance from the center of the rotor iron core 21 is longest, and, at the inter-polar space, the distance from the center of the rotor iron core is shortest, and so that the outermost surface of the rotor magnetic-pole portions 24 forms an arc, and given that sheath thickness tc formed by the outer-side surface of each permanent magnet 31 and the outermost surface of each rotor magnetic-pole portion 24 is practically constant, and letting the thickness of the permanent magnets be the magnet thickness tm, then the relation tc/tm≦0.25 is satisfied.
摘要翻译： 永磁电动机1包括固定永磁体31的转子。 在转子20中，转子磁极部24的外周形状形成为在圆周方向的中心部从转子铁芯21的中心的距离最长的位置，在极间空间处， 从转子铁芯的中心的距离最短，转子磁极部分24的最外表面形成一个电弧，并且给定由每个永磁体31的外侧表面形成的护套厚度tc和 每个转子磁极部24的最外表面几乎恒定，并且使永磁体的厚度为磁铁厚度tm，则满足关系式tc / tm <= 0.25。
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公开(公告)号：US07034424B2
公开(公告)日：2006-04-25
申请号：US10875621
申请日：2004-06-25
IPC分类号： H02K21/12
CPC分类号： H02K1/278 , H02K29/03 , H02K2201/06
摘要： A permanent magnet rotating machine includes a rotor with a permanent magnet having circumferential magnetic poles with a skew at boundaries between magnetic poles of the permanent magnet, and a stator having a stator iron core in an almost cylindrical shape and convex poles protruding inwardly, the rotor being disposed within the stator. A skew angle of the skew is smaller than a theoretical angle θs (electrical angle) and larger than one-half the theoretical angle θs, wherein the theoretical angle θs is defined as, θs=180×(number of magnetic poles in the rotor)/smallest integer of which both the number of magnetic poles in the rotor and the number of magnetic poles in the stator are factors) [deg.].
摘要翻译： 一种永久磁铁旋转机械，具有具有永久磁铁的转子，该永久磁铁具有在永久磁铁的磁极之间的边界处具有偏斜的圆周磁极和具有大致圆柱形状的定子铁心和向内突出的凸极的定子， 设置在定子内。 偏斜的偏斜角小于理论角θ（电角度）并且大于理论角θ的一半，其中理论角θ< SUB> s 定义为<？in-line-formula description =“In-line Formulas”end =“lead”？>θ = 180x（磁极数 转子）/最小整数，其中转子中的磁极数和定子中的磁极数都是因子）°。<？在线公式描述=“在线公式”结束 =“尾巴”？>
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