WO2014015727A1 - Permanent-magnet direct current motor with auxiliary slots for reducing cogging torque - Google Patents

Permanent-magnet direct current motor with auxiliary slots for reducing cogging torque Download PDF

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Publication number
WO2014015727A1
WO2014015727A1 PCT/CN2013/077651 CN2013077651W WO2014015727A1 WO 2014015727 A1 WO2014015727 A1 WO 2014015727A1 CN 2013077651 W CN2013077651 W CN 2013077651W WO 2014015727 A1 WO2014015727 A1 WO 2014015727A1
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Prior art keywords
rotor
auxiliary
direct current
permanent magnet
casing
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PCT/CN2013/077651
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French (fr)
Chinese (zh)
Inventor
张新发
郭晓伟
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广东肇庆爱龙威机电有限公司
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Publication of WO2014015727A1 publication Critical patent/WO2014015727A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
    • H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/40—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/26—Rotor cores with slots for windings

Definitions

  • This invention relates to permanent magnet direct current motors and, in particular, to designs and arrangements for suppressing cogging torque effects in permanent magnet direct current motors. Background technique
  • permanent magnet DC motors are characterized by simple structure, high reliability, high efficiency, small size and light weight. They are widely used in the automotive industry, household appliances, industrial production, transportation, aerospace and other fields. application.
  • the cogging torque effect does not have to be avoided due to the interaction between the permanent magnet and the slotted armature core.
  • the cogging torque can cause torque fluctuations, causing vibration and noise, which affects the control accuracy of the system. Therefore, how to suppress the cogging torque simply and effectively has become a hot issue in recent years.
  • the methods for weakening the cogging torque have been proposed to change the pole arc coefficient of the magnetic pole, the magnetic pole offset, the use of the oblique pole, the change of the slot width, the use of unequal width slots, the reasonable selection of the number of armature slots and the number of poles. and many more.
  • a DC motor includes a stator and a rotor, the stator includes a casing and a plurality of permanent magnets disposed inside the casing, and the rotor is disposed in the stator, and the permanent magnet DC motor is characterized by More than one auxiliary groove is provided on each crown of the rotor, the width in the direction of rotation of the rotor is equal to the width of the rotor slot, and the depth is equal to half of the width of the rotor slot, and the number of auxiliary slots is selected such that The least common multiple of the number of equivalent pole slots is increased compared to the case without the auxiliary slot.
  • the casing cross section is square in a direction perpendicular to the rotation axis of the rotor; and the plurality of permanent magnets are four permanent magnets, respectively disposed in the positive On the four corners of the square case.
  • the cross-sectional shape of each of the permanent magnets is set to: on the side remote from the rotor, a contour that matches the corresponding corner of the casing, An arcuate profile is present on one side of the rotor, and the outer edge of the xenon arc is equidistant from the axis of rotation of the rotor.
  • the permanent magnet DC motor is a 4-pole 6-slot motor, and the number of auxiliary slots on each rotor crown is two.
  • the cross-sectional shape of the auxiliary groove is curved, triangular or rectangular in a direction perpendicular to the rotation axis of the rotor.
  • the one or more auxiliary grooves on the respective crowns are symmetrically distributed with respect to the center line of the crown in the rotor rotating direction.
  • the permanent magnet DC motor further includes a concentrated winding wound around the rotor teeth.
  • the electric motor is particularly suitable for use in an automobile, for example, as an electric motor for adjusting the horizontal movement of the seat, and improves the comfort of the entire vehicle.
  • Fig. 1 schematically shows a cross-sectional view of an exemplary motor taken in a direction perpendicular to a rotational axis of a motor rotor.
  • FIG. 1 schematically shows a cross-sectional view of the motor taken in a direction perpendicular to the rotational axis of the rotor.
  • the permanent magnet DC motor comprises a stator and a rotor 2
  • the stator comprises a casing and four bodies 1 disposed inside the casing
  • the rotor 2 is disposed in the stator and has six slots 3.
  • the number of armature slots and the number of poles are A reasonable combination can change the number and magnitude of the fundamental frequency cogging torque that plays a major role in the cogging torque, effectively weakening the cogging torque. Since the number of cogging torques is a common multiple of the number of slots and the number of poles, wherein the number of fundamental frequency cogging torques is the least common multiple of the number of slots and the number of poles, therefore, by providing assistance on the crown of each rotor tooth
  • the slot 4 is optimized for the pole slot fit of the motor. Although the case where each rotor tooth has two auxiliary grooves 4 is shown in Fig. 1, other numbers of auxiliary grooves 4 may be provided.
  • the number of auxiliary slots 4 is selected to be such that the least common multiple of the number of equivalent pole slots is increased compared to the case without the auxiliary slots, thereby increasing the frequency of the fundamental frequency cogging torque and correspondingly reducing The amplitude of the fundamental frequency cogging torque, thereby suppressing the cogging torque effect.
  • the width of the auxiliary groove 4 in the direction of rotation of the rotor may be set to be equal to the width of the notch of the rotor 2, and the depth of the auxiliary groove 4 may be set equal to the rotor. 2 of the slot width is half.
  • the auxiliary grooves 4 located on the respective crowns may be symmetrically distributed with respect to the center line of the crown in which they are located. As shown in Fig. 1, two auxiliary grooves 4 located on the crown of the rotor 2 divide the crown into three equal parts.
  • the section of the auxiliary groove 4 in the direction perpendicular to the rotation axis of the rotor 2 is curved.
  • the arc-shaped auxiliary groove can be realized by a relatively simple machining process.
  • the casing cross section is set to a square, and the four permanent magnets 1 are respectively located at the four corners of the square casing.
  • the cross-sectional shape of each permanent magnet 1 is set to: on the side remote from the rotor 2, presents a contour that cooperates with the corresponding gallery angle of the casing, near the rotor A circular arc-shaped contour is present on one side of the second surface, and the outer edge of the circular arc has the same distance from the rotational axis of the rotor 2.
  • the electric motor further includes a concentrated winding wound around the rotor teeth. Since the terminating portion of the concentrated winding is short, the amount of the wire is small, the resistance of the winding wire and the copper loss are reduced, and the operating efficiency of the motor is improved. With the above structure, in the permanent magnet DC motor according to the embodiment of the present invention, the cogging torque is reduced, and accordingly, the running vibration and noise are suppressed.
  • an electric motor is particularly suitable for use in an automobile, such as, but not limited to, an electric motor for adjusting the horizontal movement of the seat to improve the comfort of the entire vehicle.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

A permanent-magnet direct current motor with auxiliary slots for reducing cogging torque comprises a stator and a rotor (2). The stator comprises a casing and a plurality of permanent magnets (1) disposed at the inside of the casing. The rotor (2) is disposed in the stator. More than one auxiliary slot (4) is disposed on each crown of the rotor (2), the width of the auxiliary slot in the rotation direction of the rotor is equal to the notch width of the rotor, the depth of the auxiliary slot is equal to half of the notch width of the rotor, and the number of the auxiliary slots (4) is selected in a way that, when compared with a condition without any auxiliary slot, the least common multiple of the equivalent number of poles and slots is increased, thereby reducing cogging torque and suppressing operation vibration and noise.

Description

一种辅助槽减少齿槽转矩的永磁直流电动机 技术领域  Permanent magnet DC motor with auxiliary slot reducing cogging torque
本发明涉及永磁直流电动机， 具体而言， 涉及用于在永磁直流电动机 中抑制齿槽转矩效应的设计和布置。 背景技术  Field of the Invention This invention relates to permanent magnet direct current motors and, in particular, to designs and arrangements for suppressing cogging torque effects in permanent magnet direct current motors. Background technique
相较于普通直流电动机， 永磁直流电动机具有结构简单、 可靠性高、 效率高、 体积小、 重量轻等特点， 在汽车工业、 家用电器、 工业生产、 交 通运输、 航空航天等领域得到了广泛应用。 然而， 在永磁电机中， 由于永 磁体和有槽电枢铁芯之间的相互作用， 不必避免地产生齿槽转矩效应。 齿 槽转矩可导致转矩波动， 引起振动和噪声， 影响系统的控制精度， 因此， 如何简单有效地抑制齿槽转矩成为近年来人们关注的热点问题。  Compared with ordinary DC motors, permanent magnet DC motors are characterized by simple structure, high reliability, high efficiency, small size and light weight. They are widely used in the automotive industry, household appliances, industrial production, transportation, aerospace and other fields. application. However, in a permanent magnet motor, the cogging torque effect does not have to be avoided due to the interaction between the permanent magnet and the slotted armature core. The cogging torque can cause torque fluctuations, causing vibration and noise, which affects the control accuracy of the system. Therefore, how to suppress the cogging torque simply and effectively has become a hot issue in recent years.
目前， 已经提出的削弱齿槽转矩的方法有改变磁极的极弧系数、 磁极 偏移、 采用斜极、 改变槽口宽度、 采用不等宽槽口、 合理选择电枢槽数和 极数， 等等。  At present, the methods for weakening the cogging torque have been proposed to change the pole arc coefficient of the magnetic pole, the magnetic pole offset, the use of the oblique pole, the change of the slot width, the use of unequal width slots, the reasonable selection of the number of armature slots and the number of poles. and many more.
在设计电机参数、 抑制齿槽转矩方面， 仍存在改进空间。 发明内容  There is still room for improvement in designing motor parameters and suppressing cogging torque. Summary of the invention
针对上述问题， 开发出本发明。 根据本发明的一实施形态， 一种 ^ 直流电动机包含定子以及转子， 定子包含机壳和设置在机壳内侧的多个永 磁体， 转子设置在定子内， 所述永磁直流电动机的特征在于， 在转子的各 个齿冠上设有一个以上的辅助槽， 其在转子旋转方向上的宽度与转子槽口 的宽度相等， 且深度等于转子槽口宽度的一半， 辅助槽的数量被选择为使 得与无辅助槽的情况下相比， 等效极槽数的最小公倍数增大。  The present invention has been developed in response to the above problems. According to an embodiment of the present invention, a DC motor includes a stator and a rotor, the stator includes a casing and a plurality of permanent magnets disposed inside the casing, and the rotor is disposed in the stator, and the permanent magnet DC motor is characterized by More than one auxiliary groove is provided on each crown of the rotor, the width in the direction of rotation of the rotor is equal to the width of the rotor slot, and the depth is equal to half of the width of the rotor slot, and the number of auxiliary slots is selected such that The least common multiple of the number of equivalent pole slots is increased compared to the case without the auxiliary slot.
优选为， 在所述永磁直流电动机中， 在与转子旋转轴垂直的方向上， 机壳截面为正方形； 并且， 所述多个永磁体为四个永磁体， 分别设置在正 方形机壳的四个角上。 Preferably, in the permanent magnet DC motor, the casing cross section is square in a direction perpendicular to the rotation axis of the rotor; and the plurality of permanent magnets are four permanent magnets, respectively disposed in the positive On the four corners of the square case.
更为优选的是， 在与转子旋转轴垂直的方向上， 各个永磁体的截面形 状被设置为： 在远离转子的一侧上呈现与相对应的机壳角的轮廊相配合的 轮廓， 在接近转子的一侧上呈现圃弧形轮廓， 且该圃弧的外缘与转子旋转 轴心之间的距离相等。  More preferably, in the direction perpendicular to the axis of rotation of the rotor, the cross-sectional shape of each of the permanent magnets is set to: on the side remote from the rotor, a contour that matches the corresponding corner of the casing, An arcuate profile is present on one side of the rotor, and the outer edge of the xenon arc is equidistant from the axis of rotation of the rotor.
优选为， 所述永磁直流电动机为 4极 6槽电动机， 且每个转子齿冠上 的辅助槽的数量为 2个。  Preferably, the permanent magnet DC motor is a 4-pole 6-slot motor, and the number of auxiliary slots on each rotor crown is two.
优选为， 在所述永磁直流电动机中， 在与转子旋转轴垂直的方向上， 辅助槽的截面形状为弧形、 三角形或矩形。  Preferably, in the permanent magnet direct current motor, the cross-sectional shape of the auxiliary groove is curved, triangular or rectangular in a direction perpendicular to the rotation axis of the rotor.
优选为， 在所述永磁直流电动机中， 在转子旋转方向上， 各个齿冠上 的所述一个以上的辅助槽相对于齿冠的中心线对称分布。  Preferably, in the permanent magnet DC motor, the one or more auxiliary grooves on the respective crowns are symmetrically distributed with respect to the center line of the crown in the rotor rotating direction.
优选为， 所述永磁直流电动机还包含绕卷在转子齿上的集中绕组。 借助以上结构， 电动机的齿槽转矩得以减小， 相应地， 运行振动和噪 音得到抑制。 该电动机特别适宜用在汽车中， 例如用作用于调节座椅水平 方向移动的电动机， 提升整车的舒适性。 附图说明  Preferably, the permanent magnet DC motor further includes a concentrated winding wound around the rotor teeth. With the above structure, the cogging torque of the motor is reduced, and accordingly, the running vibration and noise are suppressed. The electric motor is particularly suitable for use in an automobile, for example, as an electric motor for adjusting the horizontal movement of the seat, and improves the comfort of the entire vehicle. DRAWINGS
图 1示意性地示出了在与电动机转子旋转轴垂直的方向上取得的示例 性电动机的截面图。 具体实施方式  Fig. 1 schematically shows a cross-sectional view of an exemplary motor taken in a direction perpendicular to a rotational axis of a motor rotor. detailed description
下面将参照附图介绍根据本发明的优选实施例。  Preferred embodiments in accordance with the present invention will now be described with reference to the accompanying drawings.
以 4极 6槽永磁直流电动机为例， 图 1示意性地示出了在与转子旋转 轴垂直的方向上取得的电动机的截面图， 为清 ¾^见， 图中省略了电枢绕 组和机壳。 如图 1所示， 永磁直流电动机包含定子以及转子 2， 定子包含 机壳和设置在机壳内侧的 4个 体 1， 转子 2设置在定子内， 并具有 6 个槽 3。  Taking a 4-pole 6-slot permanent magnet DC motor as an example, FIG. 1 schematically shows a cross-sectional view of the motor taken in a direction perpendicular to the rotational axis of the rotor. For the sake of clarity, the armature winding and the figure are omitted. cabinet. As shown in Fig. 1, the permanent magnet DC motor comprises a stator and a rotor 2, the stator comprises a casing and four bodies 1 disposed inside the casing, and the rotor 2 is disposed in the stator and has six slots 3.
通过对永磁电机齿槽转矩进行解析分析发现， 对电枢槽数和极数进行 合理的组合， 能够改变在齿槽转矩中起主要作用的基本频率齿槽转矩的次 数和大小， 有效地削弱齿槽转矩。 由于齿槽转矩的次数是槽数和极数的公 倍数， 其中， 基本频率齿槽转矩的次数为槽数和极数的最小公倍数， 因此， 通过在每个转子齿的齿冠上设置辅助槽 4， 能够对电动机的极槽配合进行 优化。 尽管图 1中示出了每个转子齿具有两个辅助槽 4的情况， 然而， 可 以设置其他数量的辅助槽 4。 辅助槽 4的数量被选择为： 与无辅助槽的情 况下相比， 使得等效极槽数的最小公倍数增大， 由此， 增大基本频率齿槽 转矩的频率， 并相应地减小基本频率齿槽转矩的幅度， 从而抑制齿槽转矩 效应。 Through analysis and analysis of the cogging torque of the permanent magnet motor, it is found that the number of armature slots and the number of poles are A reasonable combination can change the number and magnitude of the fundamental frequency cogging torque that plays a major role in the cogging torque, effectively weakening the cogging torque. Since the number of cogging torques is a common multiple of the number of slots and the number of poles, wherein the number of fundamental frequency cogging torques is the least common multiple of the number of slots and the number of poles, therefore, by providing assistance on the crown of each rotor tooth The slot 4 is optimized for the pole slot fit of the motor. Although the case where each rotor tooth has two auxiliary grooves 4 is shown in Fig. 1, other numbers of auxiliary grooves 4 may be provided. The number of auxiliary slots 4 is selected to be such that the least common multiple of the number of equivalent pole slots is increased compared to the case without the auxiliary slots, thereby increasing the frequency of the fundamental frequency cogging torque and correspondingly reducing The amplitude of the fundamental frequency cogging torque, thereby suppressing the cogging torque effect.
如图 1所示， 根据本发明的一实施方式， 辅助槽 4在转子旋转方向上 的宽度可被设置为与转子 2的槽口的宽度相等， 且辅助槽 4的深度可被设 置为等于转子 2的槽口宽度的一半。  As shown in FIG. 1, according to an embodiment of the present invention, the width of the auxiliary groove 4 in the direction of rotation of the rotor may be set to be equal to the width of the notch of the rotor 2, and the depth of the auxiliary groove 4 may be set equal to the rotor. 2 of the slot width is half.
根据本发明的一实施方式， 在转子 2的旋转方向上， 位于各个齿冠上 的辅助槽 4可以相对于其所位于的齿冠的中心线呈现对称分布。 如图 1所 示出的那样， 位于转子 2齿冠上的两个辅助槽 4将齿冠三等分。  According to an embodiment of the invention, in the direction of rotation of the rotor 2, the auxiliary grooves 4 located on the respective crowns may be symmetrically distributed with respect to the center line of the crown in which they are located. As shown in Fig. 1, two auxiliary grooves 4 located on the crown of the rotor 2 divide the crown into three equal parts.
在图 1所示的永磁直流电动机中， 辅助槽 4在与转子 2的旋转轴垂直 的方向上的截面为弧形。 弧形形状的辅助槽可以借助相对较为简单的加工 工艺实现。  In the permanent magnet DC motor shown in Fig. 1, the section of the auxiliary groove 4 in the direction perpendicular to the rotation axis of the rotor 2 is curved. The arc-shaped auxiliary groove can be realized by a relatively simple machining process.
如图 1所示， 在永磁直流电动机中， 在与转子 2的旋转轴垂直的方向 上， 机壳截面被设置为正方形， 四个永磁体 1分别位于正方形机壳的四个 角。 在与转子 2的旋转轴垂直的方向上， 各个永磁体 1的截面形状被设置 为： 在远离转子 2的一侧上呈现与相对应的机壳角的轮廊相配合的轮廓， 在接近转子 2的一侧上呈现圆弧形轮廓， 且该圆弧的外缘与转子 2的旋转 轴心之间的距离相等。 借助这样的布置， 能够减小电动机尺寸， 节省电动 机安装空间， 并且进一步使得齿槽转矩降低。  As shown in Fig. 1, in the permanent magnet DC motor, in the direction perpendicular to the rotational axis of the rotor 2, the casing cross section is set to a square, and the four permanent magnets 1 are respectively located at the four corners of the square casing. In the direction perpendicular to the axis of rotation of the rotor 2, the cross-sectional shape of each permanent magnet 1 is set to: on the side remote from the rotor 2, presents a contour that cooperates with the corresponding gallery angle of the casing, near the rotor A circular arc-shaped contour is present on one side of the second surface, and the outer edge of the circular arc has the same distance from the rotational axis of the rotor 2. With such an arrangement, it is possible to reduce the size of the motor, save the space for mounting the motor, and further reduce the cogging torque.
在本发明的一实施方式中，电动机还包含绕卷在转子齿上的集中绕组。 由于集中绕组的端接部分较短， 故导线用量较少， 降低了绕组线圏的电阻 和铜耗， 带来了电动机运行效率的提升。 借助以上结构， 在根据本发明的实施例的永磁直流电动机中， 齿槽转 矩得以减小， 相应地， 运行振动和噪音得到抑制。 这样的电动机特别适宜 用在汽车中， 例如但不限于用作用于调节座椅水平方向移动的电动机， 提 升整车的舒适性。 In an embodiment of the invention, the electric motor further includes a concentrated winding wound around the rotor teeth. Since the terminating portion of the concentrated winding is short, the amount of the wire is small, the resistance of the winding wire and the copper loss are reduced, and the operating efficiency of the motor is improved. With the above structure, in the permanent magnet DC motor according to the embodiment of the present invention, the cogging torque is reduced, and accordingly, the running vibration and noise are suppressed. Such an electric motor is particularly suitable for use in an automobile, such as, but not limited to, an electric motor for adjusting the horizontal movement of the seat to improve the comfort of the entire vehicle.
尽管针对 4极 6槽电动机介绍了本发明的设计构思， 然而， 本发明并 不限于应用于 4极 6槽电动机， 同样可应用于具有其他极数和 /或槽数的电 动机。 上面介绍的实施例仅仅是说明性的， 而不是限制性的。 在不脱离本 发明的构思的情况下， 可对这些细节作出多种修改、 替代、 等效。 例如， 除弧形截面的辅助槽以外， 本领域技术人员可以想到用其它多种截面形状 的辅助槽代替弧形截面辅助槽以实现类似的效果， 例如， 辅助槽截面可采 用三角形、 矩形等多种其它的形状。 因此， 本发明的保护范围由权利要求 书而不是上面的说明限定， 且旨在包括落在权利要求及其等价内容范围内 的所有修改。  Although the design concept of the present invention has been described for a 4-pole 6-slot motor, the present invention is not limited to application to a 4-pole 6-slot motor, and is equally applicable to motors having other pole numbers and/or slot numbers. The embodiments described above are merely illustrative and not restrictive. Many modifications, substitutions, and equivalents may be made to these details without departing from the spirit of the invention. For example, in addition to the auxiliary groove of the arcuate section, those skilled in the art may think of replacing the arcuate section auxiliary groove with other auxiliary grooves of various cross-sectional shapes to achieve a similar effect, for example, the auxiliary groove section may adopt a triangle, a rectangle, or the like. Other shapes. Therefore, the scope of the invention is defined by the appended claims and the claims

Claims

权 利 要 求 Rights request
1. 一种永磁直流电动机， 其包含定子以及转子（2 ) ， 定子包含机壳 和设置在机壳内侧的多个 体（1 ) , 转子（2 )设置在定子内， 所 H 磁直流电动机的特征在于： A permanent magnet DC motor comprising a stator and a rotor (2), the stator comprising a casing and a plurality of bodies (1) disposed inside the casing, the rotor (2) being disposed in the stator, the H magnetic DC motor Features are:
在转子（2 )的各个齿冠上设有一个以上的辅助槽（4 ) ， 其在转子旋 转方向上的宽度与转子槽口的宽度相等，且深度等于转子槽口宽度的一半， 辅助槽（4 )的数量被选择为使得与无辅助槽的情况下相比， 等效极槽数的 最小公倍数增大。  One or more auxiliary grooves (4) are provided on each of the crowns of the rotor (2), the width in the direction of rotation of the rotor is equal to the width of the rotor slot, and the depth is equal to half the width of the rotor slot, and the auxiliary groove ( The number of 4) is selected such that the least common multiple of the number of equivalent pole slots is increased compared to the case without the auxiliary slot.
2. 根据权利要求 1的 直流电动机， 其中，  2. The direct current motor according to claim 1, wherein
在与转子旋转轴垂直的方向上， 机壳截面为正方形； 且其中， 所述多个永磁体 ( 1 )为四个永磁体， 分别设置在正方形机壳的四个角 上。  The casing cross section is square in a direction perpendicular to the rotation axis of the rotor; and wherein the plurality of permanent magnets (1) are four permanent magnets, which are respectively disposed at four corners of the square casing.
3. 根据权利要求 2的 直流电动机， 其中，  3. The direct current motor according to claim 2, wherein
在与转子旋转轴垂直的方向上，各个永磁体（ 1 )的截面形状被设置为： 在远离转子（2 )的一侧上呈现与相对应的机壳角的轮廓相配合的轮廓， 在 接近转子（2 )的一侧上呈现圆弧形轮廊， 且该圆弧的外缘与转子旋转轴心 之间的距离相等。  In the direction perpendicular to the axis of rotation of the rotor, the cross-sectional shape of each permanent magnet (1) is set to: on the side remote from the rotor (2), presents a contour that matches the contour of the corresponding casing angle, in proximity An arc-shaped wheel gallery is present on one side of the rotor (2), and the distance between the outer edge of the arc and the axis of rotation of the rotor is equal.
4. 根据权利要求 1的永磁直流电动机， 其为 4极 6槽电动机， 且每个 转子（2 )齿冠上的辅助槽（4 )的数量为 2个。  A permanent magnet direct current motor according to claim 1, which is a 4-pole 6-slot motor, and the number of the auxiliary grooves (4) on each of the rotor (2) crowns is two.
5. 根据权利要求 1或 2的 ^直流电动机， 其中， 在与转子旋转轴垂 直的方向上， 辅助槽（4 ) 的截面形状为弧形、 三角形或矩形。  The DC motor according to claim 1 or 2, wherein the auxiliary groove (4) has a sectional shape of an arc, a triangle or a rectangle in a direction perpendicular to the rotation axis of the rotor.
6.根据权利要求 1或 2的永磁直流电动机，其中，在转子旋转方向上， 各个齿冠上的所述一个以上的辅助槽（4 )相对于齿冠的中心线对称分布。  6. A permanent magnet direct current motor according to claim 1 or 2, wherein said one or more auxiliary grooves (4) on each crown are symmetrically distributed with respect to a center line of the crown in the direction of rotation of the rotor.
7.根据权利要求 1或 2的永磁直流电动机， 其还包含绕卷在转子齿上 的集中绕组。  7. A permanent magnet direct current motor according to claim 1 or 2, further comprising a concentrated winding wound around the rotor teeth.
PCT/CN2013/077651 2012-07-23 2013-06-21 Permanent-magnet direct current motor with auxiliary slots for reducing cogging torque WO2014015727A1 (en)

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CN202872485U (en) * 2012-07-23 2013-04-10 广东肇庆爱龙威机电有限公司 Permanent-magnet direct current motor with auxiliary slots of minimized cogging torque
CN105846558B (en) * 2015-01-15 2018-11-27 珠海格力电器股份有限公司 motor and compressor
CN110971028A (en) * 2018-09-30 2020-04-07 广东肇庆爱龙威机电有限公司 Vehicle seat and permanent magnet direct current motor thereof
CN208767951U (en) * 2018-09-30 2019-04-19 广东肇庆爱龙威机电有限公司 Vehicle seat and its permanent magnet DC motor

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