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CN113541350A - Square wave rotor designed based on inner rotor iron core eccentric structure - Google Patents

Square wave rotor designed based on inner rotor iron core eccentric structure Download PDF

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Publication number
CN113541350A
CN113541350A CN202110624912.6A CN202110624912A CN113541350A CN 113541350 A CN113541350 A CN 113541350A CN 202110624912 A CN202110624912 A CN 202110624912A CN 113541350 A CN113541350 A CN 113541350A
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China
Prior art keywords
iron core
rotor
eccentric
rotor iron
inner rotor
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Application number
CN202110624912.6A
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Chinese (zh)
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CN113541350B (en
Inventor
苏森
韩坤
王志强
陈胜林
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Anhui Huachi Kinetic Energy Technology Co Ltd
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Anhui Huachi Kinetic Energy Technology Co Ltd
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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
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer 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
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • 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
    • H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
    • 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
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

The invention relates to the technical field of motors or generators, and particularly discloses a square wave rotor designed based on an eccentric structure of an inner rotor iron core, which comprises the outer rotor iron core, permanent magnets, magnetic isolation blocks, the inner rotor iron core and a rotor shaft, wherein the radial outer side of the outer rotor iron core is arranged at the outer end of the rotor shaft, the radial inner side of the inner rotor iron core is arranged at the inner end of the rotor shaft, a plurality of tile-shaped permanent magnets are alternately arranged along the radial inner side of the outer rotor iron core, the tile-shaped magnetic isolation blocks are arranged between two adjacent permanent magnets, the inner contour of the inner rotor iron core is circular, the outer contour is formed by a group of eccentric arcs, the number of the eccentric arcs is the same as that of the permanent magnets, and an annular air gap is formed between the radial outer side of the inner rotor iron core and the permanent magnets; the invention adopts the rotor designed based on the eccentric structure of the inner rotor core to enable the air gap magnetic field to be close to square waves, thereby improving the counter electromotive force waveform of the hollow cup type energy storage flywheel generator, reducing the torque pulsation and improving the performance of the generator.

Description

Square wave rotor designed based on inner rotor iron core eccentric structure
Technical Field
The invention relates to the technical field of generators, and particularly discloses a square wave rotor designed based on an inner rotor iron core eccentric structure.
Background
The traditional square wave energy storage flywheel generator is mostly applied to low-rotating-speed and high-load occasions and is driven and controlled by square wave phase current, and the square wave phase current needs to interact with the opposite electromotive force of a square wave so as to reduce electromagnetic torque pulsation. The traditional hollow cup type square wave energy storage flywheel generator has larger difference between the waveform of back electromotive force and the square wave, so that the energy storage flywheel generator generates electromagnetic torque pulsation to influence the performance and efficiency of the energy storage flywheel generator. Therefore, the optimization of the structure of the energy storage flywheel generator and the reduction of the harmonic content of the air gap magnetic field waveform are of great importance to enable the air gap magnetic field waveform to be close to a square wave.
The prior patent of invention with application number 200410101898 discloses a brushless dc motor without a stator core, wherein a hollow cup stator structure can be used in the design of the brushless dc motor, so that an inner eccentric outer rotor core rotates synchronously with a permanent magnet, and no loss is generated in the core, and the hollow cup stator enables the stator to be a structure without tooth grooves, and can eliminate the cogging torque and the tooth harmonic. However, the radial thickness of the air gap of the direct current motor is uniform, so that the magnetic resistance of the radial air gap is consistent, the distribution of the air gap magnetic field is influenced, and the difference between the air gap magnetic field waveform and the square wave is large; in addition, because the permanent magnets are in direct contact with each other, interpolar magnetic leakage is generated, and the performance of the energy storage flywheel generator is influenced. Therefore, aiming at the structural design defects of the existing brushless direct current motor without the stator core, the square wave rotor designed based on the eccentric structure of the inner rotor core is designed to be used in the generator so as to reduce the waveform harmonic content of the air gap magnetic field and improve the performance of the generator.
Disclosure of Invention
The invention solves the technical problem that aiming at the structural design defects of the existing brushless direct current motor without a stator core, the invention designs a square wave rotor designed based on an eccentric structure of an inner rotor core to be used in a generator so as to reduce the waveform harmonic content of an air gap magnetic field and improve the performance of the motor.
The invention is realized by the following technical scheme:
a square wave rotor designed based on an eccentric structure of an inner rotor iron core comprises the outer rotor iron core, a permanent magnet, a magnetic isolation block, the inner rotor iron core and a rotor shaft, the radial outer side of the outer rotor iron core is arranged at the outer end of the rotor shaft, the radial inner side of the inner rotor iron core is arranged at the inner end of the rotor shaft, the tile-shaped permanent magnets are alternately arranged along the radial inner side of the outer rotor iron core, the magnetizing directions of the two adjacent permanent magnets are opposite, the tile-shaped magnetism isolating block is arranged between the two adjacent permanent magnets, the number of the magnetic isolation blocks is the same as that of the permanent magnets, the inner contour of the inner rotor iron core is circular, the outer contour of the inner rotor iron core is formed by a group of eccentric arcs, the number of the eccentric arcs is the same as that of the permanent magnets, the positions of the eccentric arcs correspond to the permanent magnets one by one, and an annular air gap is formed between the radial outer side of the inner rotor iron core and the permanent magnets;
the inner outline of the outer rotor iron core, the inner outline of the permanent magnet and the circular outline of the inner rotor iron core are concentrically arranged, the concentric point is the geometric center of the rotor, two end points of the eccentric arc are located on the connecting line of the middle points of the tile-shaped edges of the magnetic separation blocks on the two sides of the corresponding permanent magnet and the geometric center, and the connecting line of the middle points of the eccentric arc and the circle center of the eccentric arc passes through the geometric center.
As a further arrangement of the above scheme, the tile-shaped outer diameter of the magnetic isolation block is
Figure 368435DEST_PATH_IMAGE002
And satisfies the relation:
Figure 223259DEST_PATH_IMAGE004
the tile-shaped inner diameter of the magnetic isolation block is
Figure 2996DEST_PATH_IMAGE006
And satisfies the relation:
Figure 585156DEST_PATH_IMAGE008
wherein
Figure 399528DEST_PATH_IMAGE010
Is an outer rotor iron coreThe radius of the inner contour is such that,
Figure 221990DEST_PATH_IMAGE012
is the thickness of the permanent magnet.
As a further arrangement of the above scheme, the tile-shaped opening angle of the magnetic isolation block is
Figure 161128DEST_PATH_IMAGE014
And satisfies the relation:
Figure 828869DEST_PATH_IMAGE016
the tile-shaped opening angle of the permanent magnet
Figure 481436DEST_PATH_IMAGE018
Satisfy the relation
Figure 209221DEST_PATH_IMAGE020
Wherein
Figure 963550DEST_PATH_IMAGE022
Is the number of pole pairs.
As a further configuration of the above solution, the distance from the two end points of the eccentric arc to the geometric center is
Figure 700562DEST_PATH_IMAGE024
And satisfies the relation:
Figure 161631DEST_PATH_IMAGE026
。
as a further configuration of the above solution, the distance between the center of the eccentric arc and the geometric center is an eccentric value
Figure 591475DEST_PATH_IMAGE028
And satisfies the relation:
Figure 833100DEST_PATH_IMAGE030
wherein
Figure 295175DEST_PATH_IMAGE032
The coefficient of the magnetic isolation block satisfies the relation:
Figure 938646DEST_PATH_IMAGE034
。
as a further arrangement of the above solution, the radius of the eccentric arc is
Figure 273812DEST_PATH_IMAGE036
And satisfies the relation:
Figure 940417DEST_PATH_IMAGE038
。
as a further arrangement of the above scheme, the number of the eccentric arcs on the inner rotor core is
Figure 19231DEST_PATH_IMAGE040
And satisfies the relation:
Figure 517209DEST_PATH_IMAGE042
wherein
Figure 475806DEST_PATH_IMAGE044
Is the number of pole pairs.
Has the advantages that:
compared with the traditional coreless permanent magnet energy storage flywheel generator, the invention adopts the rotor designed based on the eccentric structure of the inner rotor core, the structural design of the square wave rotor ensures that the thickness edge of the radial air gap of the energy storage flywheel generator is not uniform, the radial thickness change of the air gap is more reasonable, the air gap magnetic density waveform of the energy storage flywheel generator is improved, and the air gap magnetic field is close to the square wave, thereby improving the back electromotive force waveform of the coreless energy storage flywheel generator and reducing the torque pulsation. In addition, the arrangement of the magnetic isolating blocks in the square-wave rotor avoids the generation of interpolar magnetic flux leakage caused by direct contact between permanent magnets, so that the performance of the motor is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a partial schematic structural view of embodiment 1 of the present invention;
fig. 3 is a schematic diagram showing a comparison between a rotor structure of a square wave energy storage flywheel generator designed based on an eccentric structure of an inner rotor core and an air gap field of a conventional hollow cup type energy storage flywheel generator in embodiment 1 of the present invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.
The terms "mounted," "disposed," "provided," "connected," "sleeved," "laid," and the like are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1-3, in conjunction with the embodiments.
Example 1
This embodiment 1 discloses a method for square wave energy storageThe square wave rotor is designed based on an inner rotor core eccentric structure in a flywheel generator. Referring to fig. 1 and 2, the main body components include an outer rotor core 1, a permanent magnet 2, a magnetism isolating block 3, an inner rotor core 4 and a rotor shaft 5, and the outer rotor core 1 and the inner rotor core 4 are both fixedly connected to the rotor shaft 5, so that the outer rotor core 1 and the inner rotor core 4 rotate together with the rotor shaft 5. When installed, the radially outer side of the outer rotor core 1 is attached to the outer end of the rotor shaft 5, and the radially inner side of the inner rotor core 4 is attached to the inner end of the rotor shaft 5. In the embodiment, the permanent magnet 2 and the magnetic isolation block 3 are both tile-shaped, and the thickness of the permanent magnet 2 is
Figure 426445DEST_PATH_IMAGE046
The number of the square wave energy storage flywheel generators is determined according to the actual working requirement of the square wave energy storage flywheel generators and the number of the square wave energy storage flywheel generators is determined according to the number of pole pairs. A plurality of tile-shaped permanent magnets 2 are alternately arranged along the radial inner side of the outer rotor iron core 1, and the magnetizing directions of two adjacent permanent magnets 2 are opposite. The tile-shaped magnetic isolation blocks 2 are arranged between two adjacent permanent magnets 2, and the number of the magnetic isolation blocks is the same as that of the permanent magnets 2.
The outer rotor iron core 1 is annular and has an inner diameter
Figure 308950DEST_PATH_IMAGE048
And determining according to the actual working requirement of the square wave energy storage flywheel generator. The inner contour of the inner rotor iron core 4 is circular, the outer contour thereof is composed of a group of eccentric arcs, the number of the eccentric arcs is consistent with that of the permanent magnets 2, and the positions of the eccentric arcs correspond to the permanent magnets 2 one by one. An annular air gap of the square wave energy storage flywheel generator is formed between the radial outer side of the inner rotor iron core 4 and the permanent magnet 2, a hollow cup stator (not shown in the figure) is arranged in the air gap and fixed on the shell, and the structure of the hollow cup stator is consistent with that of the existing stator. The magnetic flux generated by the permanent magnet 2 forms a closed loop through the outer rotor core 1 and the inner rotor core 4 and an air gap therebetween.
The inner outline of the outer rotor iron core 1, the inner outline of the permanent magnet 2 and the circular outline of the inner rotor iron core 4 are concentrically arranged, and the concentric point is used as the geometric center of the square wave energy storage flywheel generator (also as the geometric center of the rotor). Two end points of an eccentric arc on the inner rotor iron core 4 are positioned on the connecting line of the middle point of the tile-shaped edges of the magnetic separating blocks 3 at two sides of the corresponding permanent magnet 2 and the geometric center of the square wave energy storage flywheel generator, and meanwhile, the connecting line of the middle point of the eccentric arc and the center of the circle of the eccentric arc passes through the geometric center of the square wave energy storage flywheel generator.
As shown in fig. 2, point O in the figure is the geometric center of the square wave energy storage flywheel generator; A. b point is two end points of the eccentric arc, O' point is the center of the eccentric arc, and H point is the middle point of the eccentric arc; C. d, E is the middle point of the tile-shaped edge of the magnetic isolation blocks at the two sides of the permanent magnet 2;
Figure 599117DEST_PATH_IMAGE050
is the thickness of the permanent magnet 2;
Figure 541665DEST_PATH_IMAGE052
the radius of the inner profile of the outer rotor iron core 1;
Figure 166550DEST_PATH_IMAGE054
is the radius of the eccentric arc;
Figure 56009DEST_PATH_IMAGE056
the distance from two end points of the eccentric arc to the geometric center of the square wave energy storage flywheel generator is shown;
Figure 528579DEST_PATH_IMAGE058
the distance eccentricity value between the circle center of the eccentric arc and the geometric center of the square wave energy storage flywheel generator is taken as the eccentric value;
Figure 642028DEST_PATH_IMAGE060
is the tile-shaped inner diameter of the magnetic block 3,
Figure 504942DEST_PATH_IMAGE062
the outer diameter of the tube is the same as the diameter of the tube,
Figure 729250DEST_PATH_IMAGE064
is its opening angle;
Figure 790747DEST_PATH_IMAGE066
is the tile-shaped opening angle of the permanent magnet 2.
Two end points A, B of the eccentric arc are on the connection line of the middle point C, D of the tile-shaped edge of the magnetic isolation blocks 3 at two sides of the corresponding permanent magnet 2 and the geometric center O of the square wave energy storage flywheel generator, namely, A is on a line segment OC and B is on a line segment OD. The connecting line of the center point of the eccentric arc and the center of the circle passes through the geometric center of the energy storage flywheel generator, namely the point O is positioned on the line segment O' H.
Meanwhile, the square wave rotor designed based on the inner rotor core eccentric structure meets the following design regarding dimensions when being arranged:
1) the tile-shaped outer diameter of the magnetic isolation block is
Figure 262048DEST_PATH_IMAGE068
And satisfies the relation:
Figure 674575DEST_PATH_IMAGE070
the tile-shaped inner diameter is
Figure 702574DEST_PATH_IMAGE072
And satisfies the relation:
Figure 821840DEST_PATH_IMAGE074
wherein
Figure 11513DEST_PATH_IMAGE076
Is the radius of the inner profile of the outer rotor iron core,
Figure 911336DEST_PATH_IMAGE078
the thickness of the permanent magnet is equal to the tile-shaped opening angle of the magnetic isolation block
Figure 664397DEST_PATH_IMAGE080
And satisfies the relation:
Figure 966065DEST_PATH_IMAGE082
(ii) a Tile-shaped opening angle of permanent magnet
Figure 264322DEST_PATH_IMAGE084
Satisfy the relation
Figure 651441DEST_PATH_IMAGE086
Wherein
Figure 21243DEST_PATH_IMAGE088
The number of pole pairs of the square wave energy storage flywheel generator is.
2) The number of the eccentric arcs on the inner rotor iron core is as follows, and the relation is satisfied:
Figure 98789DEST_PATH_IMAGE090
；
3) the distance from two end points of the eccentric arc on the inner rotor iron core to the geometric center of the square wave energy storage flywheel generator is
Figure 364685DEST_PATH_IMAGE092
And satisfies the relation:
Figure 973521DEST_PATH_IMAGE094
；
4) the distance between the center of an eccentric arc on the inner rotor iron core and the geometric center of the square wave energy storage flywheel generator is an eccentric value
Figure 147014DEST_PATH_IMAGE096
And satisfies the relation:
Figure 610225DEST_PATH_IMAGE098
wherein
Figure 578181DEST_PATH_IMAGE100
The coefficient of the magnetic isolation block satisfies the relation:
Figure 674313DEST_PATH_IMAGE102
。
5) the radius of the eccentric arc on the inner rotor iron core is
Figure 323600DEST_PATH_IMAGE104
And satisfies the relation:
Figure 188788DEST_PATH_IMAGE106
。
the embodiment of the invention uses the inner contour radius of an outer rotor
Figure DEST_PATH_IMAGE108
Is 65mm, and the thickness of the permanent magnet
Figure DEST_PATH_IMAGE110
4.5mm, number of pole pairs
Figure DEST_PATH_IMAGE112
For example, the rotor structure of the square wave energy storage flywheel generator designed based on the eccentric structure of the inner rotor core is 4, and the magnetic isolation block and the eccentric inner rotor core are designed:
is composed of
Figure DEST_PATH_IMAGE114
Obtaining the tile-shaped outer diameter of the magnetic separation block
Figure DEST_PATH_IMAGE116
Is 65mm and is represented by the formula
Figure DEST_PATH_IMAGE118
To obtain a tile-shaped inner diameter
Figure DEST_PATH_IMAGE120
61.175mm, is represented by the formula
Figure DEST_PATH_IMAGE122
Tile-shaped opening angle for obtaining magnetic isolating block
Figure DEST_PATH_IMAGE124
Satisfy the requirement of
Figure DEST_PATH_IMAGE126
In order to facilitate the processing and the manufacturing,
Figure DEST_PATH_IMAGE128
preferably takes on a value of
Figure DEST_PATH_IMAGE130
Is of the formula
Figure DEST_PATH_IMAGE132
Determining the tile-shaped opening angle of the permanent magnet 2
Figure DEST_PATH_IMAGE134
Is composed of
Figure DEST_PATH_IMAGE136
(42.5°)；
Is composed of
Figure DEST_PATH_IMAGE138
Obtaining the distance from two end points of the eccentric arc to the geometric center of the square wave energy storage flywheel generator
Figure DEST_PATH_IMAGE140
Satisfy the requirement of
Figure DEST_PATH_IMAGE142
In order to facilitate the processing and the manufacturing,
Figure DEST_PATH_IMAGE144
the preferred value is 55 mm;
is composed of
Figure DEST_PATH_IMAGE146
Obtaining the distance eccentricity value between the center of the eccentric arc and the geometric center of the square wave energy storage flywheel generator
Figure DEST_PATH_IMAGE148
Satisfy the requirement of
Figure DEST_PATH_IMAGE150
In order to facilitate the processing and the manufacturing,
Figure DEST_PATH_IMAGE152
preferably 30 mm;
is composed of
Figure DEST_PATH_IMAGE154
To obtain the radius of the eccentric arc
Figure DEST_PATH_IMAGE156
Is 83.5 mm.
The traditional hollow cup type energy storage flywheel generator is taken as a comparative example, and the parameters of the energy storage flywheel generator are that the inner diameter of an outer rotor is 65mm, and the number of pole pairs
Figure DEST_PATH_IMAGE158
The outer diameter of the inner rotor is 55mm, the outer diameter of the permanent magnet is 65mm, the thickness is 4.5mm, and the inner diameter is 60.5 mm. Compared with the traditional hollow cup type energy storage flywheel generator, the square wave energy storage flywheel generator rotor structure air gap magnetic field designed based on the inner rotor core eccentric structure is closer to a square wave.
Referring to FIG. 3, the square wave was evaluated in the flat top ratio
Figure DEST_PATH_IMAGE160
Push-press type
Figure DEST_PATH_IMAGE162
Is calculated, wherein
Figure DEST_PATH_IMAGE164
Is the part above 98% of the maximum value of the air-gap magnetic field in one period of the air-gap waveform,
Figure DEST_PATH_IMAGE166
is the half cycle width of the air gap waveform. Compared with the traditional hollow cup energy storage flywheel generator structure, the invention ensures that
Figure DEST_PATH_IMAGE168
The yield is increased from 48.14% to 66.85% and 38.9%.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A square wave rotor designed based on an eccentric structure of an inner rotor iron core comprises the outer rotor iron core, a permanent magnet, a magnetic isolation block, the inner rotor iron core and a rotor shaft, the radial outer side of the outer rotor iron core is arranged at the outer end of the rotor shaft, the radial inner side of the inner rotor iron core is arranged at the inner end of the rotor shaft, it is characterized in that a plurality of tile-shaped permanent magnets are alternately arranged along the radial inner side of the outer rotor iron core, the magnetizing directions of the two adjacent permanent magnets are opposite, the tile-shaped magnetism isolating block is arranged between the two adjacent permanent magnets, the number of the magnetic isolation blocks is the same as that of the permanent magnets, the inner contour of the inner rotor iron core is circular, the outer contour of the inner rotor iron core is formed by a group of eccentric arcs, the number of the eccentric arcs is the same as that of the permanent magnets, the positions of the eccentric arcs correspond to the permanent magnets one by one, and an annular air gap is formed between the radial outer side of the inner rotor iron core and the permanent magnets;
the inner outline of the outer rotor iron core, the inner outline of the permanent magnet and the circular outline of the inner rotor iron core are concentrically arranged, the concentric point is the geometric center of the rotor, two end points of the eccentric arc are located on the connecting line of the middle points of the tile-shaped edges of the magnetic separation blocks on the two sides of the corresponding permanent magnet and the geometric center, and the connecting line of the middle points of the eccentric arc and the circle center of the eccentric arc passes through the geometric center.
2. The square-wave rotor designed based on the eccentric structure of the inner rotor core as claimed in claim 1, wherein the magnetic isolating block has a tile-shaped outer diameter of
Figure DEST_PATH_IMAGE001
And satisfies the relation:
Figure 141430DEST_PATH_IMAGE002
the tile-shaped inner diameter of the magnetic isolating block satisfies the relation:
Figure DEST_PATH_IMAGE003
wherein
Figure 730674DEST_PATH_IMAGE004
The radius of the inner profile of the outer rotor iron core is the thickness of the permanent magnet.
3. The square-wave rotor designed based on the eccentric structure of the inner rotor core as claimed in claim 2, wherein the tile-shaped opening angle of the magnet isolating block is
Figure DEST_PATH_IMAGE005
And satisfies the relation:
Figure 198827DEST_PATH_IMAGE006
the tile-shaped opening angle of the permanent magnet
Figure DEST_PATH_IMAGE007
Satisfy the relation
Figure 531719DEST_PATH_IMAGE008
Wherein
Figure DEST_PATH_IMAGE009
Is the number of pole pairs.
4. The square-wave rotor designed based on the eccentric structure of the inner rotor core as claimed in claim 3, wherein the distances from the two end points of the eccentric arc to the geometric center satisfy the following relation:
Figure 798622DEST_PATH_IMAGE010
。
5. the square-wave rotor designed based on the eccentric structure of the inner rotor core as claimed in claim 4, wherein the distance between the center of the eccentric arc and the geometric center is an eccentric value
Figure DEST_PATH_IMAGE011
And satisfies the relation:
Figure 293188DEST_PATH_IMAGE012
wherein, the coefficient of the magnetic isolation block satisfies the relation:
Figure DEST_PATH_IMAGE013
。
6. the square-wave rotor designed based on the eccentric structure of the inner rotor core as recited in claim 5, wherein the radius of the eccentric arc is such that the following relation is satisfied:
Figure 514216DEST_PATH_IMAGE014
。
7. the square-wave rotor designed based on the eccentric structure of the inner rotor core as claimed in claim 1, wherein the number of the eccentric arcs on the inner rotor core is as follows, and satisfies the relation: wherein, the number of pole pairs is.
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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN101635496A (en) * 2008-07-25 2010-01-27 张玉宝 Use method of outer rotor reluctance motor, optical-mechanical-electrical integrated control system and three-phase alternating current
CN209120022U (en) * 2018-11-14 2019-07-16 哈尔滨理工大学 A kind of Novel dual-rotor permanent magnet motor structure
CN112421825A (en) * 2020-12-04 2021-02-26 江苏富天江电子电器有限公司 Embedded permanent magnet motor rotor and permanent magnet motor
CN112865459A (en) * 2021-04-12 2021-05-28 北京航空航天大学 Hollow cup structure motor with arc permanent magnet

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CN101635496A (en) * 2008-07-25 2010-01-27 张玉宝 Use method of outer rotor reluctance motor, optical-mechanical-electrical integrated control system and three-phase alternating current
CN209120022U (en) * 2018-11-14 2019-07-16 哈尔滨理工大学 A kind of Novel dual-rotor permanent magnet motor structure
CN112421825A (en) * 2020-12-04 2021-02-26 江苏富天江电子电器有限公司 Embedded permanent magnet motor rotor and permanent magnet motor
CN112865459A (en) * 2021-04-12 2021-05-28 北京航空航天大学 Hollow cup structure motor with arc permanent magnet

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