CN119182266A - Axial magnetic flux magnetic field modulation permanent magnet motor with double-layer magnetic conduction blocks - Google Patents
Axial magnetic flux magnetic field modulation permanent magnet motor with double-layer magnetic conduction blocks Download PDFInfo
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- CN119182266A CN119182266A CN202411339264.XA CN202411339264A CN119182266A CN 119182266 A CN119182266 A CN 119182266A CN 202411339264 A CN202411339264 A CN 202411339264A CN 119182266 A CN119182266 A CN 119182266A
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- stator
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- axial
- modulation ring
- modulation
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- 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
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
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- 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
- H02K1/26—Rotor cores with slots for windings
-
- 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
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
-
- 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
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention relates to the field of motor magnetic field modulation, in particular to an axial magnetic flux magnetic field modulation permanent magnet motor with double-layer magnetic conduction blocks, which comprises a motor body, wherein a stator and a rotor are arranged in the motor body, a fixed modulation ring and a movable modulation ring which are coaxially arranged along the axial direction are arranged between the stator and the rotor, an axial air gap is arranged between the movable modulation ring and the rotor to form a single-stator double-modulation ring single-rotor structure.
Description
Technical Field
The invention relates to the field of motor magnetic field modulation, in particular to an axial magnetic flux magnetic field modulation permanent magnet motor with double-layer magnetic conduction blocks.
Background
The axial flux motor is also called a disk motor, has incomparable advantages of radial flux motors, such as better cooling adjustment, high power density, compact structure, small volume and large radius to axial length ratio, is very suitable for some application occasions with special requirements on motor size and appearance, has great development and application prospect in high-torque application occasions and high-performance servo systems, and is widely applied to many occasions of life and industrial application such as robots, electric automobiles, centrifuges and the like due to the rapid advance of processing technology and the development of high-performance permanent magnet materials.
Since the concept of a magnetic field modulation type permanent magnet gear is proposed and widely studied, a modulation pole structure is introduced into a traditional permanent magnet motor by a permanent magnet field modulation motor, and a low pole pair high-rotation-speed stator armature winding magnetic field is modulated by utilizing a special harmonic effect according to a magnetic field modulation principle, so that harmonic magnetic field components which can be matched with a high pole pair low-rotation-speed permanent magnet magnetic field are obtained, and the torque density is improved to adapt to low-speed high-torque application occasions.
At present, the permanent magnet motor mainly adjusts the magnetic field of the motor by two methods of adjusting magnetomotive force and magnetic circuit magnetic resistance, but the method for adjusting magnetomotive force needs to add an extra exciting winding, so that copper loss is increased to reduce the efficiency of the motor, or the demagnetization risk of a permanent magnet is increased, and the method for adjusting magnetic circuit magnetic resistance needs to have a more complex mechanical structure to reduce the operation reliability of the motor.
Disclosure of Invention
The invention aims to provide an axial magnetic flux field modulation permanent magnet motor with double-layer magnetic conduction blocks, so as to solve the problems in the background art.
In order to achieve the above purpose, the axial magnetic flux magnetic field modulation permanent magnet motor with the double-layer magnetic conduction blocks comprises a motor body, wherein a stator and a rotor are arranged in the motor body, a fixed modulation ring and a movable modulation ring which are coaxially arranged along the axial direction are arranged between the stator and the rotor, and an axial air gap is arranged between the movable modulation ring and the rotor to form a single-stator double-modulation ring single-rotor structure;
the fixed modulation ring and the movable modulation ring both comprise magnetic conduction blocks and annular non-magnetic conduction rings, and a plurality of the magnetic conduction blocks are fixedly arranged on the outer sides of the annular non-magnetic conduction rings along the circumferential direction;
The fixed modulation ring is different from the movable modulation ring in that the fixed modulation ring is fixedly arranged between the stator and the rotor, and the movable modulation ring is movably connected between the stator and the rotor;
and the two groups of magnetic conduction blocks on the fixed modulation ring and the movable modulation ring are axially staggered to form a magnetic field passage by rotating the movable modulation ring between the fixed modulation ring and the movable modulation ring, so that the coupling degree of a permanent magnetic field between the stator and the rotor is adjusted.
The stator comprises a stator core and a stator armature winding, wherein one side of the stator core is provided with an axial stator yoke and a plurality of axial stator teeth uniformly distributed on the axial stator yoke along the circumferential direction, and the stator armature winding is wound on the axial stator teeth in a cross-slot mode.
Further, the rotor comprises a rotor core and rotor permanent magnets, and the rotor permanent magnets are uniformly distributed on the rotor core along the circumferential direction.
And the number of the magnetic conductive blocks on the fixed modulation ring and the movable modulation ring is equal to the sum of the pole pairs of the stator armature winding and the rotor permanent magnet.
And further, after the magnetic field generated by the stator armature winding is modulated by the fixed modulation ring and the movable modulation ring, the generated spatial harmonic pole pair number of the modulated magnetic field is the same as the pole pair number of the permanent magnetic field generated by the rotor permanent magnet.
Further, the rotor permanent magnet adopts an alternate pole axial magnetizing mode or a Halbach type magnetizing mode.
Further, the annular non-magnetic ring is made of a low magnetic permeability material.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the motor, the double-layer modulation ring formed by the fixed modulation ring and the movable modulation ring is adopted, the internal magnetic field intensity is adjusted by adjusting the position of the magnetic conduction block on the movable modulation ring, and the magnetic field intensity can be flexibly adjusted in a certain range according to different running conditions and performance requirements, so that the motor performance is optimized, and the motor can adapt to wider working conditions and load requirements;
2. unlike traditional magnetic field regulating method with magnetomotive force or magnetic circuit reluctance, the motor has no need of adding exciting winding, reducing the demagnetization risk of permanent magnet and complex auxiliary mechanical device, and has simple motor structure, low motor cost and high motor operation reliability.
Drawings
FIG. 1 is a schematic elevational view of the overall structure of the present invention;
FIG. 2 is a schematic illustration showing the stator, stationary modulation ring, movable modulation ring and rotor of the present invention disassembled;
FIG. 3 is a schematic view of a stator according to the present invention;
FIG. 4 is a schematic view of a rotor structure according to the present invention;
FIG. 5 is a schematic diagram showing a combination of a fixed modulation ring and a movable modulation ring in a normal state of a motor according to the present invention;
FIG. 6 is a schematic diagram showing a combination of a fixed modulation ring and a movable modulation ring in a field weakening state of a motor according to the present invention;
FIG. 7 is a schematic diagram showing the distribution of magnetic conductive blocks on the fixed modulation ring and the movable modulation ring inside the stator and the rotor in the normal state of the motor according to the present invention;
fig. 8 is a schematic diagram of distribution patterns of magnetic conductive blocks on the fixed modulation ring and the movable modulation ring inside the stator and the rotor in the weak magnetic state of the motor in the invention.
In the figure, 1 part of the stator, 2 parts of the fixed modulation ring, 3 parts of the movable modulation ring, 4 parts of the rotor, 2-1 parts of the magnetic conduction block, 2-2 parts of the annular non-magnetic conduction ring, 1-1 parts of the stator iron core, 1-2 parts of the stator armature winding, 4-1 parts of the rotor iron core, 4-2 parts of the rotor permanent magnet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-8, in a preferred embodiment of the present invention, an axial magnetic flux magnetic field modulation permanent magnet motor with double-layer magnetic conductive blocks includes a motor body, a stator 1 and a rotor 4 are disposed inside the motor body, a fixed modulation ring 2 and a movable modulation ring 3 are disposed between the stator 1 and the rotor 4 coaxially along an axial direction, and an axial air gap is disposed between the movable modulation ring 3 and the rotor 4, so as to form a single-stator double-modulation ring single-rotor structure;
The fixed modulation ring 2 and the movable modulation ring 3 both comprise magnetic conductive blocks 2-1 and annular non-magnetic conductive rings 2-2, a plurality of magnetic conductive blocks 2-1 are fixedly arranged on the outer side of the annular non-magnetic conductive rings 2-2 along the circumferential direction, wherein the annular non-magnetic conductive rings are made of low magnetic permeability materials, as shown in fig. 5, the fixed modulation ring 2 and the movable modulation ring 3 are formed by uniformly connecting the magnetic conductive blocks 2-1 on the annular non-magnetic conductive rings 2-2 along the circumferential direction, in fig. 5, 6, 7 and 8, only one structural scheme is provided that the magnetic conductive blocks 2-1 are uniformly connected on the annular non-magnetic conductive rings 2-2 along the circumferential direction, the magnetic conductive rings can also be connected through outer low magnetic permeability materials, or the magnetic conductive rings 2-1 are poured by epoxy resin and other low magnetic permeability materials, and the section of the magnetic conductive blocks 2-1 in the vertical axial direction is of a parallel or fan-shaped structure.
The fixed modulation ring 2 and the movable modulation ring 3 are different in that the fixed modulation ring 2 is fixedly arranged between the stator 1 and the rotor 4, and the movable modulation ring 3 is movably connected between the stator 1 and the rotor 4;
The fixed modulation ring 2 and the movable modulation ring 3 are axially staggered to form a magnetic field passage by rotating the movable modulation ring 3, so that the coupling degree of the permanent magnetic field between the stator 1 and the rotor 4 is adjusted.
Therefore, the magnetic field intensity can be flexibly adjusted within a certain range according to different running conditions and performance requirements by adjusting the relative positions of the two groups of magnetic conduction blocks 2-1 between the fixed modulation ring 2 and the movable modulation ring 3.
Specifically, the stator 1 comprises a stator core 1-1 and a stator armature winding 1-2, wherein one side of the stator core 1-1 is provided with an axial stator yoke and a plurality of axial stator teeth uniformly distributed on the axial stator yoke along the circumferential direction, and the stator armature winding 1-2 is wound on the axial stator teeth in a cross-slot manner.
The stator iron core 1-1 is made of silicon steel sheets or laminated by thin steel sheets, the silicon steel sheets have good magnetic permeability, eddy current loss can be effectively reduced, efficiency is improved, and insulating materials are arranged outside the stator armature winding 1-2 to isolate so as to prevent short circuit.
Preferably, the rotor 4 comprises a rotor core 4-1 and rotor permanent magnets 4-2, the rotor permanent magnets 4-2 are uniformly distributed on the rotor core 4-1 along the circumferential direction, when current flows through the stator 1, a rotating magnetic field is generated in space, and the rotating magnetic field interacts with a magnetic field generated by the rotor permanent magnets 4-2 in an air gap after being modulated by the double-layer modulation rings 2 and 3 to generate moment, so that the driving motor operates.
The number of the magnetic conductive blocks 2-1 on the fixed modulation ring 2 and the movable modulation ring 3 is equal to the sum of the pole pairs of the stator armature winding 1-2 and the rotor permanent magnet 4-2, if the pole pair number of the stator armature winding 1-2 is P1 and the pole pair number of the rotor permanent magnet 4-2 is P2, the number of the magnetic conductive blocks 2-1 on the single modulation ring is N=P1+P2.
It should be added that after the magnetic field generated by the stator armature winding 1-2 is modulated by the fixed modulation ring 2 and the movable modulation ring 3, the spatial harmonic pole pair number of the generated modulated magnetic field is the same as the pole pair number of the permanent magnetic field generated by the rotor permanent magnet 4-2.
Alternatively, the rotor permanent magnet 4-2 adopts an alternate polar axial magnetizing mode or a Halbach magnetizing mode, wherein the Halbach magnetizing mode has a magnetism gathering effect, and is beneficial to improving the air gap magnetic flux density of the motor.
In this embodiment, when the motor works in a normal working state, the position of the movable modulation ring 3 is shown in fig. 5, at this time, the fixed modulation ring 2 and the magnetic conductive block 2-1 on the movable modulation ring 3 are completely overlapped in the axial direction, the magnetic field generated by the stator armature winding 1-2 is modulated by the modulation ring formed by overlapping the fixed modulation ring 2 and the movable modulation ring 3, and the generated spatial harmonic pole pair number is matched with the pole pair number of the rotor permanent magnet 4-2, so that the stator 1 and the rotor 4 can perform stable energy transfer.
When the intensity of the magnetic field in the motor needs to be regulated, the position of the movable modulation ring 3 is shown in fig. 6, at this time, the fixed modulation ring 2 and the magnetic conduction block 2-1 on the movable modulation ring 3 are staggered in the axial direction to form a magnetic field passage, so that the modulation effect of the two modulation rings is weakened, the coupling degree of the magnetic field generated by the stator armature winding 1-2 to the permanent magnetic field generated by the rotor permanent magnet 4-2 is reduced, and the motor is enabled to work in a weak magnetic state.
Meanwhile, the axial magnetic flux magnetic field modulation permanent magnet motor with the double-layer magnetic conduction blocks has the advantages of high power density and compact structure of the axial motor, and can improve the torque density by utilizing the magnetic field modulation principle to cope with the application occasions of low speed and high torque. The motor provided by the invention provides a simpler and cost-effective solution through the design of the double-layer modulation ring, and the design does not need an additional excitation winding, so that the demagnetization risk of the permanent magnet is reduced, a complex auxiliary mechanical device is omitted, the motor structure is simplified, the manufacturing cost is reduced, and the running reliability of the motor is improved.
In addition, the design has higher flexibility and adaptability, and the magnetic field strength can be flexibly adjusted in a certain range according to different running conditions and performance requirements by adjusting the relative position of the magnetic conduction block 2-1, so that the motor performance is optimized, and the motor can adapt to wider working conditions and load requirements.
It should finally be noted that in the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or communicating between two elements, as will be understood by those skilled in the art, and the specific meaning of the terms in the present invention will be understood in view of the specific circumstances.
The foregoing is a further elaboration of the present invention in connection with the detailed description, and it is not intended that the invention be limited to the specific embodiments shown, but rather that a number of simple deductions or substitutions be made by one of ordinary skill in the art without departing from the spirit of the invention, should be considered as falling within the scope of the invention as defined in the appended claims.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411339264.XA CN119182266A (en) | 2024-09-25 | 2024-09-25 | Axial magnetic flux magnetic field modulation permanent magnet motor with double-layer magnetic conduction blocks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411339264.XA CN119182266A (en) | 2024-09-25 | 2024-09-25 | Axial magnetic flux magnetic field modulation permanent magnet motor with double-layer magnetic conduction blocks |
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| Publication Number | Publication Date |
|---|---|
| CN119182266A true CN119182266A (en) | 2024-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411339264.XA Pending CN119182266A (en) | 2024-09-25 | 2024-09-25 | Axial magnetic flux magnetic field modulation permanent magnet motor with double-layer magnetic conduction blocks |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578633A (en) * | 2015-01-26 | 2015-04-29 | 哈尔滨理工大学 | Axial magnetic field modulation type composite motor with improved flux modulation structure and improved magnetizing direction |
| CN205583965U (en) * | 2016-05-12 | 2016-09-14 | 哈尔滨理工大学 | Mixed Excitation Axial Flux Modulation Composite Structure Motor |
| CN106911243A (en) * | 2017-03-20 | 2017-06-30 | 东南大学 | One kind translation ring-like permanent-magnet eddy current arrangements for speed regulation of adjustable magnetic |
| CN114915127A (en) * | 2022-06-01 | 2022-08-16 | 南通大学 | Axial magnetic field modulation type composite motor |
| CN221042619U (en) * | 2023-10-13 | 2024-05-28 | 昆明理工大学 | Rotary magnetic regulating motor with permanent magnet excitation of stator |
-
2024
- 2024-09-25 CN CN202411339264.XA patent/CN119182266A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578633A (en) * | 2015-01-26 | 2015-04-29 | 哈尔滨理工大学 | Axial magnetic field modulation type composite motor with improved flux modulation structure and improved magnetizing direction |
| CN205583965U (en) * | 2016-05-12 | 2016-09-14 | 哈尔滨理工大学 | Mixed Excitation Axial Flux Modulation Composite Structure Motor |
| CN106911243A (en) * | 2017-03-20 | 2017-06-30 | 东南大学 | One kind translation ring-like permanent-magnet eddy current arrangements for speed regulation of adjustable magnetic |
| CN114915127A (en) * | 2022-06-01 | 2022-08-16 | 南通大学 | Axial magnetic field modulation type composite motor |
| CN221042619U (en) * | 2023-10-13 | 2024-05-28 | 昆明理工大学 | Rotary magnetic regulating motor with permanent magnet excitation of stator |
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