CN112491169A - Stator magnetic-gathering type bilateral permanent magnet motor - Google Patents
Stator magnetic-gathering type bilateral permanent magnet motor Download PDFInfo
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- CN112491169A CN112491169A CN202011247554.3A CN202011247554A CN112491169A CN 112491169 A CN112491169 A CN 112491169A CN 202011247554 A CN202011247554 A CN 202011247554A CN 112491169 A CN112491169 A CN 112491169A
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- stator
- rotor
- permanent magnet
- teeth
- permanent magnets
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- 230000002146 bilateral effect Effects 0.000 title claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000005415 magnetization Effects 0.000 claims abstract description 5
- 230000004907 flux Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002457 bidirectional effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
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
- H02K1/17—Stator cores with permanent magnets
-
- 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
- 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
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- 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
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
本发明公开一种定子聚磁型双边永磁电机，涉及永磁电机领域，包括定子、电枢绕组、转子和非导磁转轴，非导磁转轴、转子和定子按照从内到外依次设置，定子包括定子铁心轭、定子外齿、定子内齿和定子永磁体，定子铁心轭设置在定子外齿、定子内齿与转子之间，相邻的定子外齿和定子内齿间形成空气槽，空气槽用于放置定子永磁体，定子轭和转子间形成定子槽，定子槽用于放置缠绕在定子铁心齿上的三相电枢绕组；本发明通过采用双边永磁的结构设计，将转子永磁体和定子永磁体在空间上分隔开，实现双向磁场调制效果，丰富了电机的气隙磁场，通过定子永磁体内嵌为V型聚磁结构，提高了有效气隙磁场谐波幅值，增强了定子永磁体的聚磁效果。
The invention discloses a stator magnetization-converging bilateral permanent magnet motor, which relates to the field of permanent magnet motors, comprising a stator, an armature winding, a rotor and a non-magnetically conductive rotating shaft. The stator includes a stator core yoke, stator outer teeth, stator inner teeth and stator permanent magnets. The stator core yoke is arranged between the stator outer teeth, the stator inner teeth and the rotor, and air slots are formed between adjacent stator outer teeth and stator inner teeth. The air slot is used to place the permanent magnets of the stator, a stator slot is formed between the stator yoke and the rotor, and the stator slot is used to place the three-phase armature winding wound on the teeth of the stator iron core; the present invention adopts the structural design of bilateral permanent magnets to make the rotor permanent. The magnets and the stator permanent magnets are separated in space to realize the bidirectional magnetic field modulation effect, which enriches the air gap magnetic field of the motor. The V-shaped magnetic concentrating structure is embedded in the stator permanent magnet, which improves the harmonic amplitude of the effective air gap magnetic field. The magnetization effect of the permanent magnets of the stator is enhanced.
Description
Technical Field
The invention relates to the field of permanent magnet motors, in particular to a stator magnetism-gathering type bilateral permanent magnet motor.
Background
Compared with the traditional induction motor, a Permanent Magnet Synchronous Motor (PMSM) has the advantages of relatively high power/torque density, overload capacity and the like because the PMSM adopts the traditional rare earth Permanent Magnet material (such as neodymium iron boron) with higher magnetic energy product. However, at this time, the permanent magnet is embedded in or attached to the surface of the rotor, so that the difficulty of permanent magnet fixation and machining of the rotor is increased. In view of this, various stator permanent magnet type PMSM motors have been widely proposed and studied. However, the air gap magnetic density major and minor harmonics of the stator permanent magnet type motor are static minor harmonics and cannot contribute to torque, so that the torque output capacity of the motor is relatively low.
Therefore, the advantages of the rotor and the stator permanent magnet are combined, the stator permanent magnet and the rotor permanent magnet are superposed in an air gap magnetic field, the torque density of the motor is further improved, and the motor has a good engineering application value in the application of occasions such as electric automobiles, aerospace and the like.
Disclosure of Invention
In order to solve the defects in the background art, the invention aims to provide a stator magnetism-gathering type bilateral permanent magnet motor, which aims at the problems in the prior art and solves the problems of low torque density and high permanent magnet consumption of the traditional stator permanent magnet and rotor permanent magnet motors.
The purpose of the invention can be realized by the following technical scheme:
a stator magnetism-gathering type bilateral permanent magnet motor comprises a stator, an armature winding, a rotor and a non-magnetic-conductive rotating shaft, wherein the non-magnetic-conductive rotating shaft, the rotor and the stator are sequentially arranged from inside to outside;
the stator comprises a stator iron core yoke, stator external teeth, stator internal teeth and stator permanent magnets, wherein the stator iron core yoke is arranged among the stator external teeth, the stator internal teeth and the rotor;
and a radial magnetizing permanent magnet is arranged below each pole of the rotor, rotor teeth are arranged between two adjacent rotor permanent magnets, and a rotor yoke is arranged outside the non-magnetic-conduction rotating shaft in a surrounding manner.
Furthermore, the stator permanent magnet is of a magnetism gathering structure, a stator core bridge is arranged between the stator permanent magnet and the rotor, and the stator core bridge is used for protecting the stator permanent magnet.
Furthermore, the magnetization directions of the stator permanent magnets point to the non-magnetic-conductive rotating shaft.
Furthermore, the magnetization directions of the permanent magnets of the rotor all point to the non-magnetic-conductive rotating shaft.
The invention has the beneficial effects that:
1. the invention adopts the structural design of bilateral permanent magnets to spatially separate the rotor permanent magnet and the stator permanent magnet, thereby realizing the bidirectional magnetic field modulation effect and enriching the air gap field of the motor;
2. according to the invention, the stator permanent magnet is embedded into the V-shaped magnetism gathering structure, so that the effective air gap magnetic field harmonic amplitude is improved, and the magnetism gathering effect of the stator permanent magnet is enhanced;
3. the invention adopts the rotor alternating pole design, and the stator permanent magnet is embedded into the stator teeth, the stator permanent magnet can also be regarded as an alternating pole design, and the double alternating pole design is adopted at the sides of the stator and the rotor to obviously improve the bidirectional magnetic field modulation effect.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional block diagram of the motor of the present invention;
FIG. 2 is a waveform of the air gap flux density of the motor of the present invention;
fig. 3 is a load torque waveform diagram of the motor of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1, the stator flux concentration type bilateral permanent magnet motor according to the present embodiment includes a stator 1, an armature winding 2, a rotor 3, and a non-magnetic conductive shaft 4. The non-magnetic conductive rotating shaft 4, the rotor 3 and the stator 1 are arranged in sequence from inside to outside. The stator 1 comprises a stator iron core yoke 1.1, stator external teeth 1.2, stator internal teeth 1.3, stator permanent magnets 1.4 and a stator iron core bridge 1.5, wherein the stator iron core yoke 1.1 is arranged between the stator external teeth 1.2, the stator internal teeth 1.3 and the rotor 3, and a cavity for placing the stator permanent magnets 1.4 of the V-shaped magnetic gathering structure is formed between the adjacent stator external teeth 1.2 and the stator internal teeth 1.3. A cavity is formed between the stator yoke 1.1 and the rotor 3 for placing the three-phase armature winding 2 wound on the stator core teeth. Rotor teeth 3.1, rotor permanent magnets 3.2 and rotor yokes 3.3 of the rotor 3 are arranged around the outside of the non-magnetic-conductive rotating shaft 4, one radial magnetizing permanent magnet 3.2 is arranged below each pole of the rotor 3, and the rotor teeth 3.1 are arranged between two adjacent rotor permanent magnets 3.2.
Referring to fig. 1, the torque capacity improvement operation principle of the stator flux concentration type bilateral permanent magnet motor of the present embodiment is as follows:
the stator and rotor permanent magnet magnetomotive forces can be expressed as
Wherein Z issAnd ZrAre respectively provided withRepresenting number of stator teeth and number of rotor pole pairs, FSPMiAnd FRPMjRespectively representing the magnetomotive force Fourier coefficients of the stator i times and the rotor j times; theta denotes the rotor position, theta0Expressed as initial rotor position, ΩrIndicated as the rotor rotation speed. Stator and rotor permeance functions can be expressed as
Wherein, ΛsmAnd ΛrnExpressed as the stator m-times and rotor n-times permeance coefficients, respectively. The magnetomotive force-magnetic conductance method can obtain the air gap flux density of
Bg(θ,t)＝[FSPM(θ)+FRPM(θ,t)]Λsr(θ,t) (5)
The average torque of the bilateral permanent magnet motor can be deduced by an energy method
Wherein N iscoilNumber of coils connected in series per phase, kwIs the winding factor, IAFor the phase current amplitude, is EAIs the back-emf fundamental wave of coil A, TSPMAnd TRPMRespectively, the torque generated by the permanent magnets of the stator and the rotor, respectively
As can be seen from equations (6) - (8), the torque of the bilateral permanent magnet motor can be regarded as the superposition of the permanent magnet torques of the stator and the rotor.
With reference to fig. 2, the air gap flux density superposition effect diagram of the stator flux concentration type bilateral permanent magnet motor of the present embodiment is as follows: the air gap flux densities generated by the stator permanent magnet 1.4 and the rotor permanent magnet 3.2 in the air gap are superposed, so that the total air gap flux density is obviously increased.
With reference to fig. 3, the torque capacity effect diagram of the stator flux concentration type bilateral permanent magnet motor of the present embodiment is as follows: the stator permanent magnet 1.4 and the rotor permanent magnet 3.2 act with the armature winding at the same time, and the generated torque can be regarded as the superposition of the torque generated by the stator permanent magnet 1.4 and the rotor permanent magnet 3.2, so that the torque output capacity of the motor is remarkably improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (4)
1. A stator magnetism-gathering type bilateral permanent magnet motor comprises a stator (1), an armature winding (2), a rotor (3) and a non-magnetic-conductive rotating shaft (4), and is characterized in that the non-magnetic-conductive rotating shaft (4), the rotor (3) and the stator (1) are sequentially arranged from inside to outside;
the stator (1) comprises a stator iron core yoke (1.1), stator external teeth (1.2), stator internal teeth (1.3) and stator permanent magnets (1.4), wherein the stator iron core yoke (1.1) is arranged between the stator external teeth (1.2), the stator internal teeth (1.3) and the rotor (3), air grooves are formed between the adjacent stator external teeth (1.2) and the stator internal teeth (1.3) and used for placing the stator permanent magnets (1.4), stator grooves are formed between the stator yoke (1.1) and the rotor (3) and used for placing three-phase armature windings (2) wound on the stator iron core teeth;
the permanent magnet rotor is characterized in that a radial magnetizing permanent magnet (3.2) is arranged below each pole of the rotor (3), rotor teeth (3.1) are arranged between two adjacent rotor permanent magnets (3.2), and a rotor yoke (3.3) is arranged outside the non-magnetic-conductive rotating shaft (4) in a surrounding mode.
2. The stator magnetism-gathering type bilateral permanent magnet motor according to claim 1, wherein the stator permanent magnet (1.4) is of a V-shaped magnetism-gathering type structure, a stator core bridge (1.5) is arranged between the stator permanent magnet (1.4) and the rotor, and the stator core bridge (1.5) is used for protecting the stator permanent magnet (1.4).
3. A stator flux concentration type bilateral permanent magnet motor according to claim 1, wherein the magnetization directions of the stator permanent magnets (1.4) are all directed to the non-magnetic conductive rotating shaft (4).
4. A stator flux concentration type bilateral permanent magnet machine according to claim 1, wherein the magnetization directions of the rotor permanent magnets (3.2) are all directed to the non-magnetic conductive rotating shaft (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011247554.3A CN112491169A (en) | 2020-11-10 | 2020-11-10 | Stator magnetic-gathering type bilateral permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011247554.3A CN112491169A (en) | 2020-11-10 | 2020-11-10 | Stator magnetic-gathering type bilateral permanent magnet motor |
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| Publication Number | Publication Date |
|---|---|
| CN112491169A true CN112491169A (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011247554.3A Pending CN112491169A (en) | 2020-11-10 | 2020-11-10 | Stator magnetic-gathering type bilateral permanent magnet motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114552931A (en) * | 2022-03-28 | 2022-05-27 | 安徽大学 | Stator Yoke Permanent Magnet Dual Modulation Motor |
| WO2022241980A1 (en) * | 2021-01-07 | 2022-11-24 | 苏州赛得尔智能科技有限公司 | Flux-concentrating direct-drive permanent magnet electric motor |
| CN117277634A (en) * | 2023-11-21 | 2023-12-22 | 华侨大学 | A permanent magnet vernier motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010017493A1 (en) * | 1997-04-07 | 2001-08-30 | Japan Servo Co., Ltd. | Magnet type stepping motor |
| CN103904846A (en) * | 2013-09-12 | 2014-07-02 | 江苏大学 | Stator permanent magnet type dual-rotor motor structure for hybrid electric vehicle |
| CN108595772A (en) * | 2018-03-26 | 2018-09-28 | 江苏大学 | A kind of 2D magnetic circuit subdivision modeling methods of the double permanent magnetism vernier motors of rotor |
| CN108880164A (en) * | 2018-07-09 | 2018-11-23 | 武汉理工大学 | A kind of two-way modulation composite excitation alternating pole motor |
| CN110112879A (en) * | 2019-04-30 | 2019-08-09 | 华中科技大学 | A kind of two-sided permanent magnet type synchronous motor |
-
2020
- 2020-11-10 CN CN202011247554.3A patent/CN112491169A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010017493A1 (en) * | 1997-04-07 | 2001-08-30 | Japan Servo Co., Ltd. | Magnet type stepping motor |
| CN103904846A (en) * | 2013-09-12 | 2014-07-02 | 江苏大学 | Stator permanent magnet type dual-rotor motor structure for hybrid electric vehicle |
| CN108595772A (en) * | 2018-03-26 | 2018-09-28 | 江苏大学 | A kind of 2D magnetic circuit subdivision modeling methods of the double permanent magnetism vernier motors of rotor |
| CN108880164A (en) * | 2018-07-09 | 2018-11-23 | 武汉理工大学 | A kind of two-way modulation composite excitation alternating pole motor |
| CN110112879A (en) * | 2019-04-30 | 2019-08-09 | 华中科技大学 | A kind of two-sided permanent magnet type synchronous motor |
Non-Patent Citations (1)
| Title |
|---|
| 仲叙 等: "双边永磁励磁游标电机运行原理及电磁特性仿真研究", 《电机与控制应用》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022241980A1 (en) * | 2021-01-07 | 2022-11-24 | 苏州赛得尔智能科技有限公司 | Flux-concentrating direct-drive permanent magnet electric motor |
| CN114552931A (en) * | 2022-03-28 | 2022-05-27 | 安徽大学 | Stator Yoke Permanent Magnet Dual Modulation Motor |
| CN117277634A (en) * | 2023-11-21 | 2023-12-22 | 华侨大学 | A permanent magnet vernier motor |
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Application publication date: 20210312 |