CN103904852A - Novel permanent magnetic structure outer rotor disc type motor - Google Patents
Novel permanent magnetic structure outer rotor disc type motor Download PDFInfo
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Abstract
一种新型永磁体结构外转子盘式电机，涉及电机领域，具体涉及盘式电机转子领域。解决了现有的永磁盘式无铁心同步电机转子采用等厚永磁体阵列，在一定程度上浪费了材料和无法利用主磁极与辅助磁极相配合的关系，使气隙磁密波形趋于正弦的问题。它包括一对电机转子，所述的电机转子为圆环形结构，且由N个永磁体组首尾固定连接构成，一对电机转子以楔形绕组盘为中心镜向对称设置，且每个电机转子的气隙侧均为平面结构；每个永磁体组由8块永磁体依次排列组成，8块永磁体分别为1至8号永磁体，8块永磁体的轴向横截面均为扇形；1号和5号永磁体的轴向截面为矩形，双号永磁体的轴向截面为梯形，3和7号永磁体的轴向截面为矩形，它应用在电机领域。
A novel permanent magnet structure external rotor disk motor relates to the field of motors, in particular to the field of disk motor rotors. It solves the problem that the existing permanent disk type coreless synchronous motor rotor adopts an equal-thickness permanent magnet array, which wastes materials to a certain extent and cannot use the relationship between the main magnetic pole and the auxiliary magnetic pole, so that the air gap flux density waveform tends to be sinusoidal. question. It includes a pair of motor rotors, the motor rotor is a ring structure, and is composed of N permanent magnet groups fixedly connected end to end, a pair of motor rotors are mirror-symmetrically arranged around the wedge-shaped winding disc, and each motor rotor The air gap side of the air gap is a planar structure; each permanent magnet group is composed of 8 permanent magnets arranged in sequence, and the 8 permanent magnets are respectively No. 1 to No. 8 permanent magnets, and the axial cross-sections of the 8 permanent magnets are all fan-shaped; The axial cross-sections of No. 1 and No. 5 permanent magnets are rectangular, the axial cross-sections of double-numbered permanent magnets are trapezoidal, and the axial cross-sections of No. 3 and No. 7 permanent magnets are rectangular. They are used in the field of motors.
Description
Technical field
The present invention relates to machine field, be specifically related to disk type electric motor rotor field.
Background technology
At present, rare earth permanent magnet disc style motor is a kind of New-type electric machine developing, and is different from the radial structure of traditional round pillar motor, and disc-type permanent magnet motor is axial-flux electric machine, and it is simple in structure, reliable, volume is little, quality is light, loss is little, efficiency is high.Its most significant advantage is that motor adopts permanent magnet excitation, and rotor is lossless, and motor operational efficiency is high, and because rotor equity is arranged, stator winding has good radiating condition, can obtain very high power density.The moment of inertia of this rotor is little in addition, and electro mechanic time constant is little, and peak torque and locked-rotor torque are high, and torque/weight ratio is large, and low cruise is steady, has superior dynamic property.Utilize the excellent specific property of Nd-Fe-B permanent magnetic high-coercive force to make non iron-core motor, not only motor weight can significantly decline, and vibration, noise reduce greatly.But in the face of energy crisis; the reasonable use of Nd-Fe-Bo permanent magnet material seems particularly important; existing permanent magnet disk type coreless rotor mostly adopts uniform thickness permanent magnet array; adopt the special mode of magnetizing to make air gap flux density waveform be tending towards sinusoidal; but ignore coordinating of main pole and auxiliary magnetic pole, wasted to a certain extent material.
Summary of the invention
The present invention adopts uniform thickness permanent magnet array in order to solve existing permanent magnet disk type coreless synchronous electric motor rotor, the relation of having wasted to a certain extent material and cannot utilize main pole to match with auxiliary magnetic pole, make air gap flux density waveform be tending towards sinusoidal problem, the invention provides a kind of novel permanent magnetic body structure outer rotor disc type motor.
A kind of novel permanent magnetic body structure outer rotor disc type motor, it comprises a pair of rotor, and described rotor is cirque structure, and is fixedly connected with and is formed by N set of permanent magnets head and the tail, and described N is positive integer; The mirror symmetry setting centered by wedge shape winding dish of a pair of rotor, and the air gap side of each rotor is planar structure;
Each set of permanent magnets is arranged in order and is formed by 8 permanent magnets, 8 permanent magnets are respectively No. 1 permanent magnet, No. 2 permanent magnets, No. 3 permanent magnets, No. 4 permanent magnets, No. 5 permanent magnets, No. 6 permanent magnets, No. 7 permanent magnets, No. 8 permanent magnets, and the axial cross section of described 8 permanent magnets is fan-shaped;
No. 1 described permanent magnet is identical with the structure of No. 5 permanent magnets, and the axial cross section of No. 1 permanent magnet is rectangle, and the height of this rectangle is that h1 millimeter, width are 1 millimeter of α;
No. 2 permanent magnets, No. 4 permanent magnets, No. 6 permanent magnets are identical with the structure of No. 8 permanent magnets, and the axial cross section of No. 2 permanent magnets is trapezoidal, this trapezoidal upper base is h2 millimeter, go to the bottom into h1 millimeter, high be 3 millimeters of α;
No. 3 permanent magnet is identical with the structure of No. 7 permanent magnets, and the axial cross section of No. 3 permanent magnets is rectangle, and the height of this rectangle is that h2 millimeter, width are 2 millimeters of α;
Wherein, α 1> α 3> α 2, h1>h2.
Described α 1=α 2+2.1, α 3=α 2+1.05, h1=h2+2.
Described N is 8.
The magnetizing direction of No. 1 described permanent magnet magnetizes vertically, and the magnetizing direction that is arranged in two identical No. 1 permanent magnets of two rotor positions is identical, and the magnetizing direction of i permanent magnet and the magnetizing direction of i-1 permanent magnet of one of them rotor differ 45 degree in the counterclockwise direction, the magnetizing direction of i permanent magnet and the magnetizing direction of i-1 permanent magnet of another rotor differ 45 degree along clockwise direction, i=2,3,4,5,6,7,8.
The beneficial effect that the present invention brings is, No. 1 permanent magnet and No. 5 permanent magnets are as main pole, and all the other permanent magnets are auxiliary magnetic pole, because auxiliary magnetic pole has compensating action to main pole, can there is flat-top or the shape of a saddle according to the contribution of auxiliary magnetic pole in air-gap field waveform, reduce thickness and the width of auxiliary magnetic pole, can change its contribution to magnetic field, further improve air-gap field waveform, improve electric efficiency, compared with the motor that is h1 with same size rotor permanent magnet body thickness, electric efficiency has improved 4.64%
The present invention does No. 2 permanent magnets of auxiliary magnetic pole, No. 4 permanent magnets, No. 6 permanent magnets and No. 8 permanent magnets in echelon, reduce the thickness of No. 3 permanent magnets of auxiliary magnetic pole and No. 7 permanent magnets simultaneously, can reach the air gap flux density waveform making in magnetic field and be tending towards sinusoidal wave, and improve to a certain extent air gap flux density amplitude, compared with the motor that is h1 with same size rotor permanent magnet body thickness, air gap flux density amplitude has improved 3.5%, effectively weaken harmonic content in air-gap field, especially make 3 subharmonic amplitudes reduce by 16.99% simultaneously.
The present invention adopts rotor permanent magnet body structure not wide, not uniform thickness, and compared with the motor that is h1 with same size rotor permanent magnet body thickness, permanent magnetic material has been saved 16.67% and saved the energy; Rotor of the present invention is compared with traditional Halbach permanent magnet array, more meaningful in disk type coreless synchronous machine application aspect.
Accompanying drawing explanation
Fig. 1 is the integrally-built cutaway view of a kind of novel permanent magnetic body structure outer rotor disc type motor of the present invention, wherein, Reference numeral 9 represents end-cap assembly, Reference numeral 10 represents rotor, Reference numeral 11 represents wedge shape winding dish, Reference numeral 12 represents bearing, and Reference numeral 13 represents key, and Reference numeral 14 represents axle;
Fig. 2 is the permanent magnet layout viewing of the rotor of a kind of novel permanent magnetic body structure outer rotor disc type motor described in embodiment one;
Fig. 3 is the horizontal spreading schematic diagram of 8 permanent magnets of one group of set of permanent magnets on the rotor that arranges of a pair of one-tenth mirror symmetry described in embodiment one.
Embodiment
Embodiment one: referring to Fig. 1,2 and 3 explanation present embodiments, a kind of novel permanent magnetic body structure outer rotor disc type motor described in present embodiment, it comprises a pair of rotor, described rotor is cirque structure, and be fixedly connected with and formed by N set of permanent magnets head and the tail, described N is positive integer; The mirror symmetry setting centered by wedge shape winding dish of a pair of rotor, and the air gap side of each rotor is planar structure;
Each set of permanent magnets is arranged in order and is formed by 8 permanent magnets, 8 permanent magnets are respectively 7, No. 8 permanent magnets 8 of 6, No. 7 permanent magnets of 5, No. 6 permanent magnets of 4, No. 5 permanent magnets of 3, No. 4 permanent magnets of 2, No. 3 permanent magnets of 1, No. 2 permanent magnets of No. 1 permanent magnet, and the axial cross section of described 8 permanent magnets is fan-shaped;
No. 1 described permanent magnet 1 is identical with the structure of No. 5 permanent magnets 5, and the axial cross section of No. 1 permanent magnet 1 is rectangle, and the height of this rectangle is that h1 millimeter, width are 1 millimeter of α;
4, No. 6 permanent magnets 6 of 2, No. 4 permanent magnets of No. 2 permanent magnets are identical with the structure of No. 8 permanent magnets 8, and the axial cross section of No. 2 permanent magnets 2 is trapezoidal, this trapezoidal upper base is h2 millimeter, go to the bottom into h1 millimeter, high be 3 millimeters of α;
No. 3 permanent magnet 3 is identical with the structure of No. 7 permanent magnets 7, and the axial cross section of No. 3 permanent magnets 3 is rectangle, and the height of this rectangle is that h2 millimeter, width are 2 millimeters of α;
Wherein, α 1> α 3> α 2, h1>h2.
In present embodiment, 1 and No. 5 permanent magnets 5 of No. 1 permanent magnet are as main pole, and all the other permanent magnets are auxiliary magnetic pole, because auxiliary magnetic pole has compensating action to main pole, can there is flat-top or the shape of a saddle according to the contribution of auxiliary magnetic pole in air-gap field waveform, the thickness and the width that reduce auxiliary magnetic pole, can change its contribution to magnetic field, further improves air-gap field waveform.
Present embodiment is done 6, No. 8 permanent magnets 8 of 4, No. 6 permanent magnets of 2, No. 4 permanent magnets of No. 2 permanent magnets of auxiliary magnetic pole in echelon, reduce the thickness of 3 and No. 7 permanent magnets 7 of No. 3 permanent magnets of auxiliary magnetic pole simultaneously, can reach and make air-gap field sineization, and improve to a certain extent air gap flux density amplitude, effectively weakened harmonic content in air-gap field simultaneously;
The cutaway view of the permanent magnet disk type coreless synchronous machine described in present embodiment is shown in Figure 1, and this motor in the course of the work, is wedge shape winding dish in the middle of a pair of rotor, and wedge shape winding is motor stator; Between two disc rotor motors, form wedged air gap structure, the wedged air gap of formation can guarantee that the conductor duty ratio at the inside and outside footpath of rotor place is consistent.
Embodiment two: the difference of a kind of novel permanent magnetic body structure outer rotor disc type motor described in present embodiment and embodiment one is, described α 1=α 2+2.1, α 3=α 2+1.05, h1=h2+2.
Embodiment three: the difference of a kind of novel permanent magnetic body structure outer rotor disc type motor described in present embodiment and embodiment two is, described N is 8.
Embodiment four: present embodiment and embodiment one, the difference of a kind of novel permanent magnetic body structure outer rotor disc type motor described in two or three is, the magnetizing direction of No. 1 described permanent magnet 1 magnetizes vertically, and the magnetizing direction that is arranged in two identical No. 1 permanent magnets 1 of two rotor positions is identical, and the magnetizing direction of i permanent magnet and the magnetizing direction of i-1 permanent magnet of one of them rotor differ 45 degree in the counterclockwise direction, the magnetizing direction of i permanent magnet and the magnetizing direction of i-1 permanent magnet of another rotor differ 45 degree along clockwise direction, i=2, 3, 4, 5, 6, 7, 8.
In present embodiment, the magnetizing direction of No. 1 permanent magnet 1 of for example one of them rotor is that the magnetizing direction of 90 degree, No. 2 permanent magnets 2 is that the magnetizing direction of 135 degree, No. 3 permanent magnets 3 is that the magnetizing direction of 180 degree, No. 4 permanent magnets 4 is that the magnetizing direction of 225 degree, No. 5 permanent magnets 5 is that the magnetizing direction of 270 degree, No. 6 permanent magnets 6 is that the magnetizing direction of 315 degree, No. 7 permanent magnets 7 is that the magnetizing direction of 0 degree, No. 8 permanent magnets 8 is 45 degree;
, the magnetizing direction of another rotor No. 1 permanent magnet 1 is that the magnetizing direction of 90 degree, No. 2 permanent magnets 2 is that the magnetizing direction of 45 degree, No. 3 permanent magnets 3 is that the magnetizing direction of 0 degree, No. 4 permanent magnets 4 is that the magnetizing direction of 315 degree, No. 5 permanent magnets 5 is that the magnetizing direction of 270 degree, No. 6 permanent magnets 6 is that the magnetizing direction of 225 degree, No. 7 permanent magnets 7 is that the magnetizing direction of 180 degree, No. 8 permanent magnets 8 is 135 degree.
Claims (4)
1. a novel permanent magnetic body structure outer rotor disc type motor, is characterized in that, it comprises a pair of rotor, and described rotor is cirque structure, and is fixedly connected with and is formed by N set of permanent magnets head and the tail, and described N is positive integer; The mirror symmetry setting centered by wedge shape winding dish of a pair of rotor, and the air gap side of each rotor is planar structure;
Each set of permanent magnets is arranged in order and is formed by 8 permanent magnets, 8 permanent magnets are respectively No. 1 permanent magnet (1), No. 2 permanent magnets (2), No. 3 permanent magnets (3), No. 4 permanent magnets (4), No. 5 permanent magnets (5), No. 6 permanent magnets (6), No. 7 permanent magnets (7), No. 8 permanent magnets (8), and the axial cross section of described 8 permanent magnets is fan-shaped;
Described No. 1 permanent magnet (1) is identical with the structure of No. 5 permanent magnets (5), and the axial cross section of No. 1 permanent magnet (1) is rectangle, and the height of this rectangle is that h1 millimeter, width are 1 millimeter of α;
No. 2 permanent magnets (2), No. 4 permanent magnets (4), No. 6 permanent magnets (6) are identical with the structure of No. 8 permanent magnets (8), and the axial cross section of No. 2 permanent magnets (2) is trapezoidal, this trapezoidal upper base is h2 millimeter, go to the bottom into h1 millimeter, high be 3 millimeters of α;
No. 3 permanent magnets (3) are identical with the structure of No. 7 permanent magnets (7), and the axial cross section of No. 3 permanent magnets (3) is rectangle, and the height of this rectangle is that h2 millimeter, width are 2 millimeters of α;
Wherein, α 1> α 3> α 2, h1>h2.
2. a kind of novel permanent magnetic body structure outer rotor disc type motor according to claim 1, is characterized in that, described α 1=α 2+2.1, α 3=α 2+1.05, h1=h2+2.
3. a kind of novel permanent magnetic body structure outer rotor disc type motor according to claim 2, is characterized in that, described N is 8.
4. according to claim 1, a kind of novel permanent magnetic body structure outer rotor disc type motor described in 2 or 3, it is characterized in that, the magnetizing direction of described No. 1 permanent magnet (1) magnetizes vertically, and the magnetizing direction that is arranged in identical two No. 1 permanent magnets (1) in two rotor positions is identical, and the magnetizing direction of i permanent magnet and the magnetizing direction of i-1 permanent magnet of one of them rotor differ 45 degree in the counterclockwise direction, the magnetizing direction of i permanent magnet and the magnetizing direction of i-1 permanent magnet of another rotor differ 45 degree along clockwise direction, i=2, 3, 4, 5, 6, 7, 8.
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| CN201410155417.5A CN103904852B (en) | 2014-04-17 | 2014-04-17 | A kind of magnet structure outer rotor disc type motor |
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| CN201410155417.5A CN103904852B (en) | 2014-04-17 | 2014-04-17 | A kind of magnet structure outer rotor disc type motor |
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| CN103904852B CN103904852B (en) | 2016-01-20 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319919A (en) * | 2014-09-30 | 2015-01-28 | 洛阳市施凯信机电科技有限公司 | Motor for sewing machine |
| WO2017098094A1 (en) * | 2015-12-10 | 2017-06-15 | Whylot Sas | Rotor of an axial-flow electromagnetic motor having a corrugated-shape integral magnet |
| JP2018506254A (en) * | 2015-01-16 | 2018-03-01 | ヤサ リミテッド | Axial flux machine |
| CN109462318A (en) * | 2018-11-06 | 2019-03-12 | 东南大学 | A kind of magnet structure axial stator iron-core less motor |
| CN111030401A (en) * | 2019-12-18 | 2020-04-17 | 苏州英磁新能源科技有限公司 | Disc type full-superconducting motor |
| CN111404350A (en) * | 2020-02-19 | 2020-07-10 | 哈尔滨工业大学 | Non-equal-height two-dimensional chamfered Halbach permanent magnet array for planar motors |
| CN111917265A (en) * | 2020-08-03 | 2020-11-10 | 深圳市恒驱电机股份有限公司 | Ultra-thin axial motor stator structure and disc motor with powder metallurgy backplate |
| CN111917264A (en) * | 2020-08-03 | 2020-11-10 | 深圳市恒驱电机股份有限公司 | Ultrathin axial motor stator structure with stamping back plate and disc motor |
| CN111917266A (en) * | 2020-08-03 | 2020-11-10 | 深圳市恒驱电机股份有限公司 | An ironless ultra-thin axial motor rotor structure, stator structure and disc motor |
| CN112234779A (en) * | 2020-10-13 | 2021-01-15 | 山东省科学院自动化研究所 | Motor production method and system based on variable-thickness Halbach permanent magnet array |
| CN112735731A (en) * | 2020-12-11 | 2021-04-30 | 山东省科学院自动化研究所 | Mounting sleeve structure and mounting method for Halbach permanent magnet array with irregular cross section and unequal thickness |
| CN116197780A (en) * | 2023-04-14 | 2023-06-02 | 杭州立新电机股份有限公司 | Permanent magnet processing equipment for permanent magnet synchronous motor |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319919A (en) * | 2014-09-30 | 2015-01-28 | 洛阳市施凯信机电科技有限公司 | Motor for sewing machine |
| JP2018506254A (en) * | 2015-01-16 | 2018-03-01 | ヤサ リミテッド | Axial flux machine |
| WO2017098094A1 (en) * | 2015-12-10 | 2017-06-15 | Whylot Sas | Rotor of an axial-flow electromagnetic motor having a corrugated-shape integral magnet |
| FR3045233A1 (en) * | 2015-12-10 | 2017-06-16 | Whylot | ROTOR OF AN AXIAL FLUX ELECTROMAGNETIC MOTOR HAVING AT LEAST ONE WAVED FORM MAGNET |
| CN109462318A (en) * | 2018-11-06 | 2019-03-12 | 东南大学 | A kind of magnet structure axial stator iron-core less motor |
| CN111030401A (en) * | 2019-12-18 | 2020-04-17 | 苏州英磁新能源科技有限公司 | Disc type full-superconducting motor |
| CN111404350A (en) * | 2020-02-19 | 2020-07-10 | 哈尔滨工业大学 | Non-equal-height two-dimensional chamfered Halbach permanent magnet array for planar motors |
| CN111917264A (en) * | 2020-08-03 | 2020-11-10 | 深圳市恒驱电机股份有限公司 | Ultrathin axial motor stator structure with stamping back plate and disc motor |
| CN111917265A (en) * | 2020-08-03 | 2020-11-10 | 深圳市恒驱电机股份有限公司 | Ultra-thin axial motor stator structure and disc motor with powder metallurgy backplate |
| CN111917266A (en) * | 2020-08-03 | 2020-11-10 | 深圳市恒驱电机股份有限公司 | An ironless ultra-thin axial motor rotor structure, stator structure and disc motor |
| CN112234779A (en) * | 2020-10-13 | 2021-01-15 | 山东省科学院自动化研究所 | Motor production method and system based on variable-thickness Halbach permanent magnet array |
| CN112234779B (en) * | 2020-10-13 | 2022-02-08 | 山东省科学院自动化研究所 | Motor production method and system based on variable-thickness Halbach permanent magnet array |
| CN112735731A (en) * | 2020-12-11 | 2021-04-30 | 山东省科学院自动化研究所 | Mounting sleeve structure and mounting method for Halbach permanent magnet array with irregular cross section and unequal thickness |
| CN112735731B (en) * | 2020-12-11 | 2023-09-08 | 山东省科学院自动化研究所 | An installation method for Halbach permanent magnet arrays with special-shaped cross-sections and unequal thicknesses |
| CN116197780A (en) * | 2023-04-14 | 2023-06-02 | 杭州立新电机股份有限公司 | Permanent magnet processing equipment for permanent magnet synchronous motor |
| CN116197780B (en) * | 2023-04-14 | 2023-09-26 | 佳木斯电机股份有限公司 | Permanent magnet processing equipment for permanent magnet synchronous motor |
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Effective date of registration: 20181122 Address after: 163000 Business Service Center A Business uniform 1028, Olin International Apartment Business District G, Jeanhu Road District, Daqing City, Heilongjiang Province Patentee after: DAQING HAOWEI PETROLEUM TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 150080 52 Xuefu Road, Nangang District, Harbin, Heilongjiang. Patentee before: Harbin University of Science and Technology |
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