CN203339818U - A stator and rotor structure of a permanent magnet brushless DC motor - Google Patents

A stator and rotor structure of a permanent magnet brushless DC motor Download PDF

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Publication number
CN203339818U
CN203339818U CN2013202223927U CN201320222392U CN203339818U CN 203339818 U CN203339818 U CN 203339818U CN 2013202223927 U CN2013202223927 U CN 2013202223927U CN 201320222392 U CN201320222392 U CN 201320222392U CN 203339818 U CN203339818 U CN 203339818U
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CN
China
Prior art keywords
rotor
stator
motor
groove
permanent magnet
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Expired - Fee Related
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CN2013202223927U
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Chinese (zh)
Inventor
陈治宇
田燕飞
陈风凯
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Guangdong University of Technology
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Guangdong University of Technology
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Priority to CN2013202223927U priority Critical patent/CN203339818U/en
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Publication of CN203339818U publication Critical patent/CN203339818U/en
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Abstract

The utility model discloses a stator/rotor structure of a permanent magnet brushless direct current motor, which comprises a motor stator and a motor rotor. The motor rotor is sleeved inside a hollow chamber of the motor stator. A plurality of rotor magnets are arranged inside the motor rotor. The rotor magnets respectively have one side opposed to the inner side wall of the motor stator. The inner side wall of the motor stator is provided with a plurality of stator notches. The inner side wall of the motor stator is further provided with a plurality of stator auxiliary grooves. The stator auxiliary grooves are respectively arranged between two adjacent stator notches. The motor rotor positions corresponding to the rotor magnets are respectively provided with a rotor opening. The motor rotor is further provided with round holes communicated with the rotor openings. The motor stator is provided with the auxiliary grooves. The gullet torque is thus weakened. Leakage flux loss and rotor eddy current loss are thus alleviated. The temperature rise of the motor rotor is reduced. A permanent magnet is prevented from being excessively hot and demagnetized. Furthermore, the rotor is provided with the round holes. The motor counterelectromotive force waveform can be improved and made close to trapezoidal waves.

Description

A kind of stator and rotor sructure of permanent-magnet brushless DC electric machine
Technical field
The utility model is a kind of stator and rotor sructure of permanent-magnet brushless DC electric machine, belongs to the renovation technique of the stator and rotor sructure of permanent-magnet brushless DC electric machine.
Background technology
At present, in permanent-magnet brushless DC electric machine, the auxiliary tank that stator is commonly used mainly contains rectangular channel, vee gutter and semi-circular groove, the shortcoming that this auxiliary tank exists is that cogging torque is large, dispersion loss and rotor eddy current loss are large, and the temperature rise of rotor is higher, and permanent magnet easily demagnetizes because of overheated.
Summary of the invention
The purpose of this utility model is to consider the problems referred to above and a kind of cogging torque that can slacken is provided, and reduces dispersion loss and rotor eddy current loss, thereby reduces the temperature rise of rotor, prevents the stator and rotor sructure of the permanent-magnet brushless DC electric machine of the overheated and demagnetization of permanent magnet.The utility model is reasonable in design, convenient and practical.
The technical solution of the utility model is: the stator and rotor sructure of permanent-magnet brushless DC electric machine of the present utility model, include motor stator, rotor, rotor is sleeved in the set hollow cavity of motor stator, be equiped with some rotor magnets in rotor, and a side of some rotor magnets is relative with the madial wall of motor stator, the madial wall of motor stator is provided with some stator rabbets, wherein the madial wall of motor stator also is provided with some stator auxiliary tanks, the stator auxiliary tank is separately positioned between two adjacent stator rabbets, rotor is respectively equipped with rotor openings on the position of respective rotor magnet, rotor also is provided with the circular port communicated with rotor openings.
The groove width of the stator auxiliary tank that above-mentioned motor stator is set, groove depth groove width, the groove depth of the stator rabbet set with motor stator respectively equate.
The utility model is owing to adopting the structure that also is provided with some stator auxiliary tanks at the madial wall of motor stator, and the groove width of auxiliary tank, groove depth equate with groove width, the groove depth of stator rabbet respectively, pass through simulation analysis, motor stator of the present utility model is owing to being provided with auxiliary tank, therefore can slacken cogging torque, reduce dispersion loss and rotor eddy current loss, thereby reduce the temperature rise of rotor, prevent that permanent magnet is overheated and demagnetize.In addition, rotor of the present utility model, owing to having circular port, can improve the winding back emf waveform, makes it closer to trapezoidal wave.The utility model is that a kind of design is ingenious, function admirable, the stator and rotor sructure of convenient and practical permanent-magnet brushless DC electric machine.
The accompanying drawing explanation
The structural representation that Fig. 1 is the utility model stator;
The structural representation that Fig. 2 is the utility model rotor;
Fig. 3 is the structural representation that the utility model stator and rotor are assembled together.
Embodiment
Embodiment:
Structural representation of the present utility model is as Fig. 1, 2, shown in 3, the stator and rotor sructure of permanent-magnet brushless DC electric machine of the present utility model, include motor stator 6, rotor 7, rotor 7 is sleeved in the set hollow cavity of motor stator 6, be equiped with some rotor magnets 3 in rotor 7, and a side of some rotor magnets 3 is relative with the madial wall of motor stator 6, the madial wall of motor stator 6 is provided with some stator rabbets 2, wherein the madial wall of motor stator 6 also is provided with some stator auxiliary tanks 1, stator auxiliary tank 1 is separately positioned between two adjacent stator rabbets 2, rotor 7 is respectively equipped with rotor openings 4 on the position of respective rotor magnet 3, rotor 7 also is provided with the circular port 5 communicated with rotor openings 4.
In the present embodiment, the cross sectional shape of above-mentioned rotor magnet 3 is bread shape, the bottom of rotor magnet 3 is planes, the top of rotor magnet 3 is cambered surfaces, the cambered surface of rotor magnet 3 is relative with the madial wall of motor stator 6, because the bottom of rotor magnet 3 is planes, therefore magnet more easily sticks on the rotor core surface, as shown in Figure 2.
In the present embodiment, said stator auxiliary tank 1 includes dovetail groove and semi-circular groove, and narrow limit and the semi-circular groove of dovetail groove are joined, and the narrow edge lengths of dovetail groove and the equal diameters of semi-circular groove.
In the present embodiment, the groove width of the stator auxiliary tank 1 that above-mentioned motor stator 6 is set, groove depth groove width, the groove depth of the stator rabbet 2 set with motor stator 6 respectively equate.
The utility model also is provided with some stator auxiliary tanks 1 at the madial wall of motor stator 6, the groove width of auxiliary tank, groove depth equate with groove width, the groove depth of stator rabbet respectively, pass through simulation analysis, this auxiliary tank can slacken cogging torque, reduce dispersion loss and rotor eddy current loss, thereby reduce the temperature rise of rotor, prevent that permanent magnet is overheated and demagnetize.In addition, by simulation analysis, have the rotor of circular port, can improve the winding back emf waveform, make it closer to trapezoidal wave.

Claims (4)

1.一种永磁无刷直流电机的定转子结构，包括有电机定子、电机转子，电机转子套装在电机定子所设的中空腔体内，电机转子内装设有若干转子磁铁，且若干转子磁铁的一侧与电机定子的内侧壁相对，电机定子的内侧壁设有若干定子槽口，其特征在于电机定子的内侧壁还设有若干定子辅助槽，定子辅助槽分别设置在两相邻定子槽口之间，电机转子在对应转子磁铁的位置上分别设有转子开口，电机转子还设有与转子开口相通的圆形孔。 1. A stator-rotor structure of a permanent magnet brushless DC motor, comprising a motor stator and a motor rotor, the motor rotor is sleeved in a hollow cavity provided by the motor stator, a number of rotor magnets are installed in the motor rotor, and some rotor magnets One side is opposite to the inner side wall of the motor stator, and the inner side wall of the motor stator is provided with a number of stator slots, which is characterized in that the inner side wall of the motor stator is also provided with a number of stator auxiliary slots, and the stator auxiliary slots are respectively arranged in two adjacent stator slots Between them, the rotors of the motor are respectively provided with rotor openings at positions corresponding to the rotor magnets, and the rotors of the motor are also provided with circular holes communicating with the rotor openings. 2.根据权利要求1所述的永磁无刷直流电机的定转子结构，其特征在于上述转子磁铁的截面形状呈面包形，转子磁铁的底面是平面，转子磁铁的顶面是弧面，转子磁铁的弧面与电机定子的内侧壁相对。 2. The stator-rotor structure of the permanent magnet brushless DC motor according to claim 1, characterized in that the cross-sectional shape of the above-mentioned rotor magnet is bread-shaped, the bottom surface of the rotor magnet is a plane, the top surface of the rotor magnet is an arc surface, and the rotor magnet The arc surface of the magnet is opposite to the inner wall of the motor stator. 3.根据权利要求1所述的永磁无刷直流电机的定转子结构，其特征在于上述定子辅助槽包括有梯形槽及半圆形槽，梯形槽的窄边与半圆形槽相接，且梯形槽的窄边长度与半圆形槽的直径相等。 3. The stator-rotor structure of the permanent magnet brushless DC motor according to claim 1, wherein the stator auxiliary groove includes a trapezoidal groove and a semicircular groove, and the narrow side of the trapezoidal groove is connected with the semicircular groove, And the length of the narrow side of the trapezoidal groove is equal to the diameter of the semicircular groove. 4.根据权利要求1至3任一项所述的永磁无刷直流电机的定转子结构，其特征在于上述电机定子所设的定子辅助槽的槽宽、槽深分别与电机定子所设的定子槽口的槽宽、槽深相等。 4. The stator-rotor structure of the permanent magnet brushless DC motor according to any one of claims 1 to 3, characterized in that the groove width and groove depth of the stator auxiliary groove set on the above-mentioned motor stator are respectively the same as those set by the motor stator The slot width and slot depth of the stator notch are equal.
CN2013202223927U 2013-04-27 2013-04-27 A stator and rotor structure of a permanent magnet brushless DC motor Expired - Fee Related CN203339818U (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103904793A (en) * 2014-03-28 2014-07-02 湖北立锐机电有限公司 Integrated motor stator punching sheet, motor stator and rotating motor using integrated motor stator punching sheet
CN103915925A (en) * 2014-04-10 2014-07-09 西北工业大学 Rotor structure for permanent magnet synchronous motor with step-shaped permanent magnets
CN103915926A (en) * 2014-04-10 2014-07-09 西北工业大学 Rotor structure for permanent magnet synchronous motor with triangular-step-shaped permanent magnets
CN103956838A (en) * 2014-05-21 2014-07-30 黄石东贝电器股份有限公司 Stator used in brushless direct current motor and used for reducing fundamental wave cogging torque
CN105896756A (en) * 2015-01-26 2016-08-24 奇鋐科技股份有限公司 Stator structure
CN107046337A (en) * 2016-12-30 2017-08-15 浙江众邦机电科技有限公司 A kind of magneto and its control method
WO2018040365A1 (en) * 2016-08-31 2018-03-08 徐州南普机电科技有限公司 Method for machining permanent magnetic direct-current brushless motor
CN111293799A (en) * 2020-02-27 2020-06-16 南京奥特佳新能源科技有限公司 Permanent magnet motor with optimized back electromotive force sine waveform and stator thereof
CN111555489A (en) * 2019-02-08 2020-08-18 株式会社日立产业机器 Rotating electrical machine and elevator hoist system
CN114785005A (en) * 2022-05-12 2022-07-22 哈尔滨理工大学 A permanent magnet fault-tolerant motor with double-slot structure
CN115967202A (en) * 2022-12-14 2023-04-14 国网湖北省电力有限公司经济技术研究院 Stator and rotor structure capable of reducing torque pulsation of brushless double-fed motor and design method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103904793A (en) * 2014-03-28 2014-07-02 湖北立锐机电有限公司 Integrated motor stator punching sheet, motor stator and rotating motor using integrated motor stator punching sheet
CN103915925A (en) * 2014-04-10 2014-07-09 西北工业大学 Rotor structure for permanent magnet synchronous motor with step-shaped permanent magnets
CN103915926A (en) * 2014-04-10 2014-07-09 西北工业大学 Rotor structure for permanent magnet synchronous motor with triangular-step-shaped permanent magnets
CN103956838A (en) * 2014-05-21 2014-07-30 黄石东贝电器股份有限公司 Stator used in brushless direct current motor and used for reducing fundamental wave cogging torque
CN105896756A (en) * 2015-01-26 2016-08-24 奇鋐科技股份有限公司 Stator structure
WO2018040365A1 (en) * 2016-08-31 2018-03-08 徐州南普机电科技有限公司 Method for machining permanent magnetic direct-current brushless motor
CN107046337A (en) * 2016-12-30 2017-08-15 浙江众邦机电科技有限公司 A kind of magneto and its control method
CN107046337B (en) * 2016-12-30 2024-02-02 浙江众邦机电科技有限公司 Permanent magnet motor and control method thereof
CN111555489A (en) * 2019-02-08 2020-08-18 株式会社日立产业机器 Rotating electrical machine and elevator hoist system
CN111293799A (en) * 2020-02-27 2020-06-16 南京奥特佳新能源科技有限公司 Permanent magnet motor with optimized back electromotive force sine waveform and stator thereof
CN114785005A (en) * 2022-05-12 2022-07-22 哈尔滨理工大学 A permanent magnet fault-tolerant motor with double-slot structure
CN115967202A (en) * 2022-12-14 2023-04-14 国网湖北省电力有限公司经济技术研究院 Stator and rotor structure capable of reducing torque pulsation of brushless double-fed motor and design method

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20131211

Termination date: 20140427