WO2012151817A1 - 一种永磁内转子电机 - Google Patents

一种永磁内转子电机 Download PDF

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Publication number
WO2012151817A1
WO2012151817A1 PCT/CN2011/079419 CN2011079419W WO2012151817A1 WO 2012151817 A1 WO2012151817 A1 WO 2012151817A1 CN 2011079419 W CN2011079419 W CN 2011079419W WO 2012151817 A1 WO2012151817 A1 WO 2012151817A1
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WO
WIPO (PCT)
Prior art keywords
slots
motor
stator
poles
groove
Prior art date
Application number
PCT/CN2011/079419
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English (en)
French (fr)
Inventor
夏传富
林敏萍
Original Assignee
佛山市顺德区泛仕达机电有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 佛山市顺德区泛仕达机电有限公司 filed Critical 佛山市顺德区泛仕达机电有限公司
Publication of WO2012151817A1 publication Critical patent/WO2012151817A1/zh

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Classifications

    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles

Definitions

  • the invention belongs to the technical field of motor products. Specifically, a novel permanent magnet inner rotor synchronous motor is disclosed. Background technique
  • the permanent magnet inner rotor motor includes a stator 2 and a rotor 1, the number of slots of the stator 2 and the number of pairs of permanent magnets of the rotor 1.
  • the ratio is 3:2.
  • the stator 2 has a structure of 12 stator slots.
  • the motor efficiency is significantly lower than the efficiency of the motor above 1000 rpm.
  • the motor operates at a frequency of only a few tens of hertz.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide a novel permanent magnet inner rotor motor.
  • the inner rotor motor has a high process performance, the slot insulation material of the motor is reduced, the winding coefficient is high, and the motor is ensured. Run efficiently.
  • a novel permanent magnet inner rotor motor includes a stator assembly and a shaft inner rotor disposed inside, the stator assembly including a stator core and a stator coil wound on the stator core, the stator
  • the iron core is a large-sized groove structure
  • the large-sized groove structure includes a large groove and a small groove.
  • the number of grooves of the small groove is the same as the number of grooves of the large groove, and the small groove is correspondingly distributed on the top of each tooth of the stator core.
  • the ratio of the number of slots of the large slot to the number of poles of the rotor is a fractional slot design, and the ratio of the number of slots and the number of poles of the rotor satisfies the following formula: (2p ⁇ l) /3: 2p, where p
  • the setting of the small slot greatly reduces the stator of the motor
  • p 13 (26 poles)
  • the total number of slots of the stator core is (2p ⁇ l) / 3*2.
  • the number of the large grooves is an odd multiple of 3, and the large grooves are uniform in shape and evenly distributed at equal intervals.
  • the small groove is an arcuate groove whose arc is approximately equal to 360/(2p ⁇ l), and p is the number of pairs of the motor.
  • the stator core is a fractional groove design in which the ratio of the number of slots of the large slot of the stator core to the number of poles of the rotor is a fraction, and the ratio of the number of poles to the number of rotor poles is satisfied ((2p ⁇ l) /3): 2p, where p is the number of poles of the motor, and the motor can achieve a multi-pole and small groove fit, so that the slot insulation of the motor is reduced on the basis of ensuring the maintenance of the existing high process performance.
  • the winding coefficient is high, ensuring high efficiency operation of the motor.
  • p 13 (26 poles)
  • FIG. 1 is a schematic structural view of a permanent magnet inner rotor motor in the prior art
  • FIG. 2 is a schematic structural view of a permanent magnet inner rotor motor according to the present invention.
  • Fig. 3 is a perspective view showing the three-dimensional structure of the permanent magnet inner rotor motor of the present invention. detailed description
  • the permanent magnet inner rotor motor of the present invention comprises a stator assembly and a shaft inner rotor 1 disposed inside, the stator assembly including a stator core 2 and a stator core a stator coil 3 on the stator core 2 is a fractional slot design in which the ratio of the number of slots of the large slot 21 of the stator core to the number of poles of the pair of permanent magnets of the rotor 1 is a fractional slot design, the large slot 21
  • the ratio of the number of poles to the rotor 1 satisfies ((2p ⁇ 1) /3): 2p, where p is the number of pole pairs of the motor, and the top of each tooth of the stator core 2 is correspondingly provided with a small slot 4, the small slot 4
  • the large grooves 21 are an odd multiple of 3, and the large grooves 21 have the same groove shape and are uniformly distributed equidistantly.
  • the small groove 22 at the top of each tooth of the stator core 2 is an arcuate groove whose arc is approximately equal to 360/(2p ⁇ l).
  • the ratio of the number of slots of the large slot 21 to the number of poles of the motor is 3: 8, 3: 10; 9: 26, 9: 28; 15: 44; 15: 46..., wherein the number of slots of the large slot 21 It is an odd multiple of 3, 3, 9, 15, 21...., the number of motor poles is: 3 times the number of large slots ⁇ 1, the number of motor poles must be even.
  • Figure 2 shows a 26-pole, 9-slot motor.
  • the motor can be multi-pole and slot-fitted.
  • the slot insulation of the motor is reduced and the winding factor is high.
  • p 13 (26 poles)
  • the inner rotor motor of the present invention is applied to an axial flow fan, its operating frequency is between 150 and 250 Hz, which effectively ensures efficient operation of the motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Description

一种永磁内转子电机 技术领域
本发明属于电机产品技术领域。 具体公开一种新型永磁内转子同步电机。 背景技术
现有永磁内转子电机大多数为集中绕组形式， 如图 1所示， 永磁内转子电机 包括定子 2和转子 1，所述定子 2的槽数和转子 1的成对永磁体极数之比为 3: 2， 例如， 对于典型的 8极电机， 定子 2为 12个定子槽的结构。
当电机运行在 1000转 /分以下时， 电机效率明显低于电机在高于 1000转 /分 时的效率， 电机运行的频率只有几十赫兹。
例如，当将内转子电机应用于轴流风机时，应用中存在着效率不理想的问题， 而这一问题的主要原因是电机运行频率较低， 只有几十赫兹， 而一般永磁同步电 机理想运行频率 150-250赫兹之间， 但是由于电机速度不能改变， 只能增加转子 的成对永磁体极数， 在 1000转左右的转速， 电机的极数要大于 20极， 按传统的 设计方法电机定子的槽数也必须增多至 20多个槽， 这样使得电机整体工艺性较 差， 其绕组系数低。 发明内容
本发明的目的是克服现有技术的不足，提供一种新型永磁内转子电机， 该内 转子电机在维持较高的工艺性能的基础上，电机的槽绝缘材料减少，绕组系数高， 确保电机高效率运行。
为了实现上述技术目的， 本发明按以下技术方案实现的：
本发明所述的一种新型永磁内转子电机，包括定子组件和置于内部的轴式内 转子，所述定子组件包括定子铁芯和绕设于定子铁芯上的定子线圈， 所述定子铁 芯为大小槽结构， 该大小槽结构包括大槽和小槽， 所述小槽的槽数和大槽的槽数 数相同，所述小槽对应地分布在定子铁芯各齿的顶部， 所述大槽的槽数与转子的 极数之比为分数的分数槽式设计， 所述大槽槽数和转子极数之比满足如下公式： (2p± l ) /3： 2p， 其中 p为电机极对数， 该小槽的设置大大地消减了电机定子 逆序磁场影响，使得电机每极每相槽数 q=(2p±l)/6p=l/3±l/6p。当 p=13 (26极） 时， q=26/27， 谐波系数极低。； 此外， 所述定子铁芯的总槽数为 （2p±l) /3*2。
作为上述技术的进一步改进，所述大槽的数目是 3的奇数倍， 各大槽槽形一 致， 且成等距离均匀分布。
在本发明中， 所述小槽为弧形凹槽， 其弧度近似等于 360/ (2p±l)， p为电 机极对数。
与现有技术相比， 本发明的有益效果是：
(1)发明中：所述定子铁芯为该定子铁芯的大槽的槽数与转子极数之比为分数 的分数槽式设计， 所述大槽和转子极数之比满足 （（2p±l) /3)： 2p， 其中 p为 电机极对数， 电机可以实现多极少槽的配合方式， 这样， 在确保维持现有较高的 工艺性能的基础上， 电机的槽绝缘材料减少，绕组系数高，确保电机高效率运行。
(2)本发明中定子铁芯各齿的顶部对应设有一小槽，大大地消减了电机定子逆 序磁场影响， 使得电机每极每相槽数 q=(2p±l)/6p=l/3±l/6p。 当 p=13 (26极） 时， q=26/27， 谐波系数极低。 附图说明
下面结合附图和具体实施例对本发明做详细的说明：
图 1是现有技术中永磁内转子电机结构示意图；
图 2是本发明中永磁内转子电机结构示意图；
图 3是本发明中永磁内转子电机立体结构示意图。 具体实施方式
如图 2、 图 3所示， 本发明所述的永磁内转子电机， 包括定子组件和置于内 部的轴式内转子 1， 所述定子组件包括定子铁芯 2和绕设于定子铁芯 2上的定子 线圈 3， 所述定子铁芯 2为该定子铁芯的大槽 21的槽数与转子 1的成对永磁体 极数之比为分数的分数槽式设计， 所述大槽 21和转子 1 的极数之比满足 （（2p ±1) /3)： 2p， 其中 p为电机极对数， 所述定子铁芯 2各齿的顶部对应设有一小 槽 4， 该小槽 4 大大地消减了电机定子逆序磁场影响， 使得电机每极每相槽数 q=(2p±l)/6p=l/3±l/6p。 当 p=13 (26极) 时， q=26/27， 谐波系数极低。 在本发明中， 所述大槽 21为 3的奇数倍， 且各大槽 21槽形一致， 且等距离 均匀分布。 此外， 定子铁芯 2各齿顶部的小槽 22为弧形凹槽， 其弧度近似等于 360/ (2p± l )。
本发明中， 大槽 21的槽数与电机极数之比为 3: 8， 3： 10； 9： 26， 9： 28； 15： 44; 15： 46……， 其中大槽 21的槽数是 3的奇数倍， 3、 9、 15、 21.....， 电 机极数为： 3倍大槽数 ±1， 电机极数必须是偶数。
图 2所示的就是一个为 26极 9槽的电机， 电机可以实现多极少槽配合， 电 机的槽绝缘材料减少， 绕组系数高； 此外， 每个定子铁芯 2各齿中间开有小槽 22, 大大地消减了电机定子逆序磁场影响， 使得电机每极每相槽数 q=(2p士 l)/6p=l/3 ± l/6p。 当 p=13 (26极） 时， q=26/27， 谐波系数极低。 将本发明所述 的内转子电机应用于轴流式风机时， 其运行频率 150-250赫兹之间， 有效确保电 机高效率运行。
本发明并不局限于上述实施方式，凡是对本发明的各种改动或变型不脱离本 发明的精神和范围，倘若这些改动和变型属于本发明的权利要求和等同技术范之 内， 则本发明也意味着包含这些改动和变型。

Claims

权 利 要 求
1.一种新型永磁内转子同步电机， 包括定子组件和置于内部的轴式内转子， 所述定子组件包括定子铁芯和绕设于定子铁芯上的定子线圈，其特征在于： 所述 定子铁芯为大小槽结构， 该大小槽结构包括大槽和小槽， 所述小槽的槽数和大槽 的槽数数相同，所述小槽对应地分布在定子铁芯各齿的顶部， 所述大槽的槽数与 转子的极数之比为分数的分数槽式设计，所述大槽槽数和转子极数之比满足如下 公式： （2p± l ) /3: 2p， 其中 p为电机极对数； 所述定子铁芯的总槽数为 （2p± l ) /3*2。
2.根据权利要求 1所述的新型永磁内转子同步电机， 其特征在于： 所述大槽 的数目是 3的奇数倍， 各大槽槽形一致， 且成等距离均匀分布。
3.根据权利要求 1或 2所述的新型永磁内转子同步电机， 其特征在于： 所述 小槽为弧形凹槽， 其弧度近似等于 360/ (2p± l )， p为电机极对数。
PCT/CN2011/079419 2011-05-09 2011-09-07 一种永磁内转子电机 WO2012151817A1 (zh)

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CN112366912B (zh) * 2020-10-19 2021-09-10 江苏大学 基于分数槽集中绕组永磁电机的双绕组低谐波设计方法
GB2611295A (en) * 2020-10-19 2023-04-05 Univ Jiangsu Fractional slot concentrated winding permanent magnet motor-based duplex-winding low-harmonic design method

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CN1164938A (zh) * 1995-08-23 1997-11-12 菲利浦电子有限公司 部件之间可以相互运动的电动机
CN101667770A (zh) * 2008-09-03 2010-03-10 德昌电机(深圳)有限公司 一种燃料泵及其无刷直流马达
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