CN210608875U - Radial magnetic field composite magnetic flux switching motor - Google Patents
Radial magnetic field composite magnetic flux switching motor Download PDFInfo
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- CN210608875U CN210608875U CN201921537214.7U CN201921537214U CN210608875U CN 210608875 U CN210608875 U CN 210608875U CN 201921537214 U CN201921537214 U CN 201921537214U CN 210608875 U CN210608875 U CN 210608875U
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Abstract
本实用新型涉及电机设计领域，公开了一种径向磁场复合型磁通切换电机，包括固定轴（6）、与固定轴同轴转动连接的转轴（5）、环绕转轴的内转子（4）、环绕内转子的内定子（3）、环绕内定子的轴承（23）、环绕轴承的外定子（2）、环绕外定子的外转子（1）；外定子与外转子之间以及内定子与内转子之间均设置有气隙；内转子和外转子均与转轴固定连接，内定子与固定轴固定连接，轴承（23）径向内外侧分别与内定子外径和外定子内径连接。本实用新型在提高永磁体运行可靠性、避免永磁体因弱磁调速和高温导致的不可逆退磁的前提下，满足驱动电机低速大转矩和宽调速范围运行的要求。
The utility model relates to the field of motor design, and discloses a radial magnetic field compound magnetic flux switching motor, comprising a fixed shaft (6), a rotating shaft (5) coaxially rotatably connected with the fixed shaft, and an inner rotor (4) surrounding the rotating shaft , the inner stator (3) surrounding the inner rotor, the bearing (23) surrounding the inner stator, the outer stator (2) surrounding the bearing, the outer rotor (1) surrounding the outer stator; between the outer stator and the outer rotor and between the inner stator and the inner stator Air gaps are arranged between the inner rotors; both the inner rotor and the outer rotor are fixedly connected with the rotating shaft, the inner stator is fixedly connected with the fixed shaft, and the radially inner and outer sides of the bearing (23) are respectively connected with the inner stator outer diameter and the outer stator inner diameter. On the premise of improving the operation reliability of the permanent magnets and avoiding irreversible demagnetization of the permanent magnets due to weak-field speed regulation and high temperature, the utility model meets the requirements of the drive motor running at low speed, large torque and wide speed regulation range.
Description
Technical Field
The utility model relates to a motor design field, in particular to compound magnetic flux switching motor in radial magnetic field.
Background
In recent years, a flux switching permanent magnet motor (FSPM for short) is widely researched due to high torque density and high efficiency, in the motor structure, a permanent magnet and a winding are both arranged on a stator, the rotor structure is simple, and the reliability and the dynamic running performance of the motor are improved. However, due to the inherent characteristics of the permanent magnet, the air gap field of the FSPM motor is kept constant basically during the operation, and the FSPM motor is difficult to control the excitation and limited in speed regulation range during the electric operation. Therefore, how to realize the limited adjustment and control of the magnetic field and widen the speed regulation range is one of the problems to be solved by the FSPM motor. The study of the hybrid excitation FSPM motor is carried out by the students, the stator is provided with an excitation winding besides the permanent magnet, the dual excitation source hybrid excitation mode is realized, the magnetic field regulation capacity can be improved, and the rotating speed operation range is widened. However, the stator in the motor structure has the permanent magnet and two sets of windings (the excitation winding and the armature winding) at the same time, so that on one hand, the saturation degree of a magnetic circuit is high, on the other hand, the placing space of the armature winding is restricted, and the torque output capacity is limited to a certain degree; and because the heat source is all located the stator, easily lead to stator winding and permanent magnet temperature rise too high, bring winding insulation damage and permanent magnet irreversible demagnetization.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: to the problem that exists among the prior art, the utility model provides a compound magnetic flow switching motor in radial magnetic field satisfies the requirement of driving motor low-speed big torque and the operation of wide speed governing scope under the prerequisite that improves permanent magnet operational reliability, avoids the permanent magnet because of the irreversible demagnetization that weak magnetic speed governing and high temperature lead to.
The technical scheme is as follows: the utility model provides a radial magnetic field composite magnetic flux switching motor, which comprises a fixed shaft, a rotating shaft coaxially and rotatably connected with the fixed shaft, an inner rotor surrounding the rotating shaft, an inner stator surrounding the inner rotor, a bearing surrounding the inner stator, an outer stator surrounding the bearing, and an outer rotor surrounding the outer stator; air gaps are arranged between the outer stator and the outer rotor and between the inner stator and the inner rotor; the inner rotor and the outer rotor are fixedly connected with the rotating shaft, the inner stator is fixedly connected with the fixed shaft, and the radial inner side and the radial outer side of the bearing are respectively connected with the outer diameter of the inner stator and the inner diameter of the outer stator.
Furthermore, salient pole teeth are arranged on the opposite sides of the outer rotor and the outer stator and the opposite sides of the inner rotor and the inner stator, no winding is arranged on the salient pole teeth of the outer rotor and the inner rotor, an outer armature winding and a permanent magnet are arranged on the salient pole teeth of the outer stator, and an inner winding is arranged on the salient pole teeth of the inner stator.
Preferably, the number of salient pole teeth of the outer stator isP soThe outer armature winding is formed by symmetrically distributedP soA coil sleeved on the salient pole teeth of the outer stator, and an outer armature windingmA phase concentrated winding, satisfyP so=2k 1 mWherein isk 1A positive integer; the number of the salient pole teeth of the outer rotor isP roSatisfy the following requirementsP ro=P so±2N1In which N is1Is a positive integer.
Preferably, the number of the salient pole teeth of the inner stator isP siThe inner windings being formed of symmetrically distributedP siA coil sleeved on the salient pole teeth of the inner stator, and the inner side winding isnA phase concentrated winding, satisfyP si=2k 2 nWherein isk 2A positive integer; the number of the salient pole teeth of the inner rotor isP riSatisfy the following requirementsP ri=P si±2N2In which N is2Is a positive integer.
Preferably, the permanent magnets are tangentially alternately magnetized permanent magnets.
Preferably, the inner rotor yoke portion is fixed to the rotating shaft at a radially inner edge thereof.
Preferably, the outer radial edge of the outer rotor yoke core is fixedly connected to the rotating shaft through a connecting housing.
Preferably, the inner stator yoke core is fixedly coupled to the fixed shaft through an end housing.
Preferably, the outer rotor, the outer stator, the inner rotor and the inner stator have salient pole teeth oriented in a radial direction.
Preferably, the inner winding and the outer armature winding are both multiphase concentrated armature windings.
Has the advantages that: the radial magnetic field composite motor of the utility model, the outer stator and the outer rotor form an outer motor, and the inner stator and the inner rotor form an inner motor; the inner and outer motors are completely independent and have no electromagnetic coupling, so that the inner and outer motors can be independently controlled. The inner motor and the outer motor have various motor structure options, and if the outer motor can adopt a double salient pole permanent magnet motor and a magnetic flux reversal motor. The utility model discloses an interior motor of compound magnetic flow switching motor in radial magnetic field and the tooth's socket cooperation of the salient pole tooth of the stator of outer motor and rotor, looks number and excitation mode etc. all can require nimble adjustment according to system performance.
Compared with the prior art, the utility model has the advantages of as follows:
1. the inner stator and the inner rotor of the utility model are both provided with no permanent magnet, thus avoiding the irreversible demagnetization of the permanent magnet at high temperature caused by the difficult heat dissipation of the inner motor; although the outer motor has permanent magnets, under the action of a bearing on the stator, the speed regulation is completed by the inner motor under a high-speed working condition, and the outer stator of the outer motor can always work near a rated point through the equidirectional rotation when the rotor rotates at a high speed, so that the irreversible demagnetization risk of the permanent magnets caused by the weak magnetic speed regulation of the outer motor is avoided while the torque output is increased; from above-mentioned two points, the utility model provides high permanent magnet job stabilization nature has improved the reliability of motor work.
2. The utility model discloses well inner stator and inner rotor constitute the buncher, have broad speed governing scope, and outer stator and outer rotor constitute the permanent magnetism moment of transfer motor, have great torque output ability, are used for regulating revolution speed and torque in the operation of two motors respectively to realize the power demand of load under the different work condition, satisfy the requirement of actuating system low-speed big torque and wide speed governing scope.
3. The utility model discloses well interior motor and outer motor can operate in different mode such as individual drive or common drive, can make motor alone operation in the speed governing when the outer motor permanent magnet work of moment governing breaks down, consequently the utility model discloses well motor has certain fault-tolerance.
Drawings
Fig. 1 is a cross-sectional view of a radial magnetic field composite flux switching motor in which an inner motor is a 3-phase stator 12 slot/rotor 8 pole and an outer motor is a 3-phase stator 12 slot/rotor 22 pole.
Fig. 2 is a cross-sectional view of the radial magnetic field composite flux switching motor of the present invention.
In the figure: the rotor comprises an outer rotor 1, an outer stator 2, an inner stator 3, an inner rotor 4, an outer armature winding 21, a permanent magnet 22, a bearing 23, an inner armature winding 31, a rotating shaft 5, a fixed shaft 6, a connecting shell 7 and an end shell 8.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The embodiment provides a radial magnetic field composite flux switching motor which mainly comprises a fixed shaft 6, a rotating shaft 5 coaxially and rotatably connected with the fixed shaft 6, an inner rotor 4 surrounding the rotating shaft 5, an inner stator 3 surrounding the inner rotor 4, a bearing 23 surrounding the inner stator 3, an outer stator 2 surrounding the bearing 23 and an outer rotor 1 surrounding the outer stator 2. An air gap is arranged between the outer stator 2 and the outer rotor 1, an air gap is arranged between the inner stator 3 and the inner rotor 4, salient pole teeth without windings are arranged on one side of the outer rotor 1 facing the outer stator 2 and one side of the inner rotor 4 facing the inner stator 3, salient pole teeth and outer armature windings 21 wound on the salient pole teeth are arranged on the outer side of the outer stator 2, and salient pole teeth and inner armature windings 31 wound on the salient pole teeth are arranged on the inner side of the inner stator 3. The inner rotor 4 is fixed on the rotating shaft 5 at the radial inner edge of the yoke part, the outer rotor 1 is fixed with the rotating shaft 5 at the radial outer edge of the yoke part iron core through the connecting shell 7, the inner stator 3 is fixed with the other side fixed shaft 6 through the end shell 8, a bearing 23 is arranged between the inner diameter of the outer stator 2 and the outer diameter of the inner stator 3, the radial inner side and the radial outer side of the bearing 23 are respectively connected with the outer diameter of the inner stator 3 and the inner diameter of the outer stator 2, and the salient pole teeth of the outer stator 2 are internally provided with permanent. It should be noted that, in the present invention, the salient poles of the stator and the rotor are both oriented in the radial direction.
Fig. 1 shows a radial magnetic field composite flux switching motor in which an inner motor is a 3-phase stator 12 slot/rotor 8 pole and an outer motor is a 3-phase stator 12 slot/rotor 22 pole, and the technical solution of the present embodiment will be specifically described below by taking this motor as an example.
12 permanent magnets 22 are distributed on the outer stator 2 along the circumference, an iron core groove unit is arranged between every two adjacent permanent magnets 22, the notch of the iron core groove unit faces the outer rotor 1, the 12 iron core groove units and the 12 permanent magnets are alternately arranged along the circumference, each permanent magnet 22 and two adjacent stator teeth on two tangential sides of the permanent magnet form a salient pole tooth of the outer stator 2, 12 winding coils are wound on the 12 salient pole teeth of the outer stator 2, and 4 winding coils at intervals of 90 degrees are connected in series in the same direction to form a phase concentrated winding, so that a three-phase concentrated armature winding, namely an outer armature winding 21, is formed. The number of salient pole teeth of the outer rotor 1 is 22, and the salient pole teeth thereof face the outer stator 2. The outer rotor 1, the outer stator 2, the permanent magnets 22 on the outer stator and the outer armature winding 21 form a three-phase 12/22-pole permanent magnet flux switching outer motor. The inner stator 3 is an inner salient pole tooth structure, no permanent magnet is arranged on the inner stator, 12 armature winding coils are sleeved on 12 salient pole teeth, and every 4 salient pole teeth are connected in series to form a phase concentrated winding, so that a three-phase inner armature winding, namely an inner winding 31 is formed, the number of the salient pole teeth of the inner rotor 4 is 8, and the inner rotor 4, the inner stator 3 and the inner winding 31 thereon form a three-phase 12/8-pole switched reluctance inner motor.
The inner motor adopts a switched reluctance motor, has a simple structure, is suitable for high-speed operation, is easy to cool, and can allow higher temperature rise because the inner stator 3 and the inner rotor 4 are both provided with no permanent magnet. The outer motor adopts a permanent magnet flux switching motor structure, and the outer rotor is simple in structure, high in torque density and high in efficiency. Because the outer rotor 1 and the inner rotor 4 are fixedly connected with the rotating shaft 5, the inner motor and the outer motor have the same rotor rotating speed, the inner stator 3 is fixed on the fixed shaft 6 and has no rotating speed, and the outer stator 2 can rotate at a certain rotating speed according to the working condition due to the existence of the bearing 23.
In the embodiment, the internal motor mainly completes the speed regulation of the motor according to the operation requirement, so that the rotating shaft 5 rotates at a target rotating speed and simultaneously outputs a certain torque; the outer motor can enable the outer stator 2 and the outer rotor 1 to rotate in the same direction at a different speed, so that the outer motor works near a rated point with higher efficiency, and the deficiency of the output torque of the inner motor is made up. Therefore, the inner motor and the outer motor are respectively responsible for speed regulation and torque regulation, the inner motor has small volume and is suitable for high-speed operation, and a permanent magnet is not needed, so that the permanent magnet is not needed to participate in weak magnetic speed regulation in the speed regulation process; meanwhile, the outer motor has high torque density and high torque output capacity, and due to the action of the bearing 23, the outer motor can always work near a rated point under different working conditions, so that the shortage of the output torque of the inner motor can be provided by the outer motor no matter the motor operates at low speed or high speed, and the requirements of the motor on low-speed large torque and wide speed regulation range operation are met.
The inner motor system and the outer motor system of the composite motor are not electromagnetically coupled, independent control can be performed according to two common motors, controllable parameters are greatly more than those of a common magnetic flux switching motor, and the composite motor is very flexible. The inner motor and the outer motor can run in different working modes such as single-machine driving, double-machine common driving, double-machine power generation and the like according to different working condition requirements, and when the inner motor and the outer motor both do power generation, two groups of electric energy with different power, frequency, amplitude and voltage grade can be output; the internal and external motor systems can also be operated by one for power generation and the other for electric operation, so as to meet different application occasions and performance requirements.
The utility model provides a motor is integrated with permanent magnetism magnetic flow switch outer motor and the interior motor of switched reluctance in a radial magnetic field motor space, provides two power flow path. The inner motor and the outer motor can adopt other motor structures, so that the flexibility of the system is greatly improved, and the application range is expanded.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. A radial magnetic field composite type flux switching motor is characterized by comprising a fixed shaft (6), a rotating shaft (5) coaxially and rotatably connected with the fixed shaft (6), an inner rotor (4) surrounding the rotating shaft (5), an inner stator (3) surrounding the inner rotor (4), a bearing (23) surrounding the inner stator (3), an outer stator (2) surrounding the bearing (23), and an outer rotor (1) surrounding the outer stator (2); air gaps are arranged between the outer stator (2) and the outer rotor (1) and between the inner stator (3) and the inner rotor (4); the inner rotor (4) and the outer rotor (1) are fixedly connected with the rotating shaft (5), the inner stator (3) is fixedly connected with the fixed shaft (6), and the radial inner side and the radial outer side of the bearing (23) are respectively connected with the outer diameter of the inner stator (3) and the inner diameter of the outer stator (2).
2. The radial magnetic field composite flux switching motor according to claim 1, wherein salient pole teeth are provided on the opposite sides of the outer rotor (1) and the outer stator (2) and the opposite sides of the inner rotor (4) and the inner stator (3), no winding is provided on the salient pole teeth of the outer rotor (1) and the inner rotor (4), an outer armature winding (21) and a permanent magnet (22) are provided on the salient pole teeth of the outer stator (2), and an inner winding (31) is provided on the salient pole teeth of the inner stator (3).
3. A radial-field hybrid flux-switching electric machine according to claim 2, characterized in that the number of salient pole teeth of the outer stator (2) isP soThe outer armature winding (21) is formed by symmetrically distributedP soA coil sleeved on the salient pole teeth of the outer stator (2), and the outer armature winding (21) ismA phase concentrated winding, satisfyP so=2k 1 mWherein isk 1A positive integer;
the number of salient pole teeth of the outer rotor (1) isP roSatisfy the following requirementsP ro=P so±2N1In which N is1Is a positive integer.
4. A radial magnetic field composite flux switching electric machine according to claim 3, characterized in that the number of salient pole teeth of the inner stator (3) isP siThe inner winding (31) is formed by symmetrically distributed coilsP siA coil sleeved on the salient pole teeth of the inner stator (3), and the inner winding (31) isnA phase concentrated winding, satisfyP si=2k 2 nWherein isk 2A positive integer;
the number of the salient pole teeth of the inner rotor (4) isP riSatisfy the following requirementsP ri=P si±2N2In which N is2Is a positive integer.
5. Radial field compound flux switching electrical machine according to any of claims 2 to 4, characterized in that the permanent magnets (22) are tangentially alternately magnetized permanent magnets.
6. A radial magnetic field composite flux switching electric machine according to any of claims 1 to 4, characterized in that the radially inner edge of the yoke part of the inner rotor (4) is fixed to the rotating shaft (5).
7. The radial magnetic field composite flux switching motor according to any one of claims 1 to 4, wherein a radially outer edge of a yoke core of the outer rotor (1) is fixedly connected to the rotating shaft (5) through a connection housing (7).
8. A radial magnetic field composite flux switching electric machine according to any of claims 1 to 4, characterized in that the inner stator (3) yoke core is fixedly connected with the fixed shaft (6) by means of an end housing (8).
9. A radial-magnetic-field-combined-type flux-switching electric machine according to any of claims 1 to 4, characterized in that the salient-pole teeth on the outer rotor (1), the outer stator (2), the inner rotor (4) and the inner stator (3) are oriented in the radial direction.
10. A radial-field composite flux-switching electric machine according to any of claims 2 to 4, characterized in that the inner winding (31) and the outer armature winding (21) are both polyphase concentrated armature windings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921537214.7U CN210608875U (en) | 2019-09-17 | 2019-09-17 | Radial magnetic field composite magnetic flux switching motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921537214.7U CN210608875U (en) | 2019-09-17 | 2019-09-17 | Radial magnetic field composite magnetic flux switching motor |
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| Publication Number | Publication Date |
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| CN210608875U true CN210608875U (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921537214.7U Active CN210608875U (en) | 2019-09-17 | 2019-09-17 | Radial magnetic field composite magnetic flux switching motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601474A (en) * | 2019-09-17 | 2019-12-20 | 淮阴工学院 | Radial magnetic field composite flux switching motor |
| CN113541431A (en) * | 2021-08-11 | 2021-10-22 | 齐齐哈尔赛石精工机械制造有限公司 | A permanent magnet synchronous motor that can replace the reducer |
-
2019
- 2019-09-17 CN CN201921537214.7U patent/CN210608875U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601474A (en) * | 2019-09-17 | 2019-12-20 | 淮阴工学院 | Radial magnetic field composite flux switching motor |
| CN113541431A (en) * | 2021-08-11 | 2021-10-22 | 齐齐哈尔赛石精工机械制造有限公司 | A permanent magnet synchronous motor that can replace the reducer |
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| GR01 | Patent grant | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: HUAI'AN FEMCO STEEL TECHNOLOGY CO.,LTD. Assignor: HUAIYIN INSTITUTE OF TECHNOLOGY Contract record no.: X2022980014387 Denomination of utility model: A Radial Magnetic Field Compound Flux Switching Motor Granted publication date: 20200522 License type: Exclusive License Record date: 20220908 |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231120 Address after: Room 01, 5th Floor, Building 4, No. 19 Longxing Road, Dayawan West District, Huizhou City, Guangdong Province, 516000 Patentee after: Huizhou Chihai Motor Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Effective date of registration: 20231120 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 223005 Huaian 1 Jiangsu economic and Technological Development Zone Patentee before: HUAIYIN INSTITUTE OF TECHNOLOGY |