CN113270985A - Modularized axial magnetic field permanent magnet motor - Google Patents

Modularized axial magnetic field permanent magnet motor Download PDF

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Publication number
CN113270985A
CN113270985A CN202110563283.0A CN202110563283A CN113270985A CN 113270985 A CN113270985 A CN 113270985A CN 202110563283 A CN202110563283 A CN 202110563283A CN 113270985 A CN113270985 A CN 113270985A
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CN
China
Prior art keywords
stator
rotor
permanent magnet
core modules
motor
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Granted
Application number
CN202110563283.0A
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Chinese (zh)
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CN113270985B (en
Inventor
林明耀
贾伦
林克曼
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Southeast University
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Southeast University
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Publication of CN113270985A publication Critical patent/CN113270985A/en
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    • 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
    • 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
    • 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
    • H02K1/16—Stator 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
    • 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
    • H02K1/2793—Rotors axially facing stators
    • 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
    • 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
    • H02K2213/12—Machines characterised by the modularity of some components
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention relates to the field of motor design, in particular to a modular axial magnetic field permanent magnet motor which comprises two symmetrically arranged outer rotors and an inner stator, wherein each rotor comprises a rotor bracket made of a non-magnetic-conducting material, a plurality of rotor core modules, a permanent magnet and a motor rotating shaft, the rotor core modules and the permanent magnet are arranged in sector grooves formed in the rotor bracket, each stator comprises a stator core module, an armature winding and a stator bracket made of the non-magnetic-conducting material, and the stator core modules and the armature windings are arranged in the stator brackets. The modularized axial magnetic field permanent magnet motor structure adopts a dual-rotor middle stator, stator iron core and rotor iron core modularized structure, shortens a magnetic flux path, reduces the weight of a stator iron core, increases the power density of the motor, reduces the difficulty and cost of a production and processing process, and is suitable for various occasions such as electric automobiles, wind power generation, elevator traction and the like.

Description

Modularized axial magnetic field permanent magnet motor
Technical Field
The invention relates to the field of motor design, in particular to a modularized axial magnetic field permanent magnet motor.
Background
At present, power density has become a very important design indicator in motor design. High power density motors are receiving increasing attention from researchers and manufacturers due to their small size, light weight, high efficiency, and the like. Particularly, in special application occasions such as aerospace, submarines, electric vehicles and the like, due to the limitation of space, the used motor is required to be smaller in size, lighter in weight and higher in efficiency, namely the motor is required to have higher power density.
Compared with a conventional radial magnetic field motor, the axial magnetic field permanent magnet motor has the characteristics of short axial length, large torque, high power density and the like. The traditional single-rotor single-stator axial magnetic field permanent magnet motor usually has larger single-side magnetic pull force. In order to overcome the unilateral magnetic pull force, the axial magnetic field permanent magnet motor is generally designed to be of a bilateral structure, namely a double-stator middle rotor structure or a double-rotor middle stator structure. Meanwhile, the existing rotor core of the axial magnetic field permanent magnet motor is mostly made of wound silicon steel sheets or an integral composite soft magnetic material, the manufacturing difficulty is high when the size of the motor is large, the production process is simplified while the power density of the motor is guaranteed, and a modularized axial magnetic field permanent magnet motor is developed and has important engineering application value.
Disclosure of Invention
In order to solve the above mentioned disadvantages in the background art, the present invention aims to provide a modular axial field permanent magnet motor, wherein a stator core and a rotor core of the motor are both in a modular structure, so that a magnetic flux path is shortened, a power density of the motor is increased, and a manufacturing difficulty of the motor is simplified.
The purpose of the invention can be realized by the following technical scheme:
a modularized permanent magnet motor with an axial magnetic field comprises two symmetrically arranged outer rotors and an inner stator, wherein each rotor comprises a rotor bracket made of a non-magnetic-conductive material, a plurality of rotor core modules, a permanent magnet and a motor rotating shaft;
the stator comprises a stator core module, an armature winding and a stator bracket made of non-magnetic materials, wherein the stator core module and the armature winding are arranged in the stator bracket;
the rotor support is of a circular disc-shaped structure, and N is uniformly arranged on one side of the rotor supportpAnd the permanent magnets are arranged between two adjacent rotor core modules to form an iron core-permanent magnet-iron core independent unit.
Further, the thickness of the rotor core module, the thickness of the permanent magnet and the thickness of the groove on the rotor support are the same in the axial direction.
Further, the number of pole pairs P of the motor rotor and the number of rotor core modules NrNumber N of permanent magnets of rotorpThe ratio of 1: 2: 1.
furthermore, the permanent magnets are in the shape of a sector, the magnetizing direction is tangential, namely along the circumferential direction, the magnetizing directions of the two rotor permanent magnets are opposite, the rotor iron core modules are also in the shape of a sector, the rotor iron core modules are arranged into silicon steel sheets or composite soft magnetic materials which are laminated along the radial direction, and the rotor support is made of non-magnetic and non-conductive materials.
Further, the stator core module comprises center pillars and tooth crowns on two axial sides, the tooth crowns are wider than the center pillars and parallel slot openings are formed between the tooth crowns of the adjacent stator core modules, stator parallel slots are formed between the center pillars of the adjacent stator core modules, and transition inclined shoulders are formed between the center pillars and the tooth crowns.
Further, the stator core modules are arranged at equal intervals along the circumferential direction to form stator slots, the copper armature windings are directly wound on the middle columns of the stator core modules, and the planes formed by the winding coils are perpendicular to the rotating shaft of the motor.
Further, the stator support includes supporting disk, stator bottom suspension supporting disk, inner ring and outer loop on the stator, and the supporting disk is identical and the symmetry is placed with stator bottom suspension supporting disk shape on the stator, and all opens the groove that has Ns quantity along circumference, sets up with the cooperation of the tooth crown of stator core module, and inner ring and outer loop set up respectively on the stator inboard and the outside of supporting disk and stator bottom suspension supporting disk.
Furthermore, the stator core modules are arranged into silicon steel sheets or composite soft magnetic materials which are laminated along the radial direction, and the stator support is made of non-magnetic and non-conductive materials.
The invention has the beneficial effects that:
the modularized axial magnetic field permanent magnet motor structure adopts a dual-rotor middle stator, stator iron core and rotor iron core modularized structure, shortens a magnetic flux path, reduces the weight of a stator iron core, increases the power density of the motor, reduces the difficulty and cost of a production and processing process, and is suitable for various occasions such as electric automobiles, wind power generation, elevator traction and the like.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without creative efforts;
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is an exploded view of the permanent magnet motor construction of the present invention;
fig. 3 is a schematic view of the individual units of core-permanent magnet-core in the rotor of the machine according to the invention;
FIG. 4 is a top view of a rotor model of the motor of the present invention;
FIG. 5 is a schematic view of a stator core module of the motor of the present invention;
FIG. 6 is a top view of a stator pattern (with stator frame removed) of the motor of the present invention;
FIG. 7 is a schematic view of a stator frame model of the motor of the present invention;
fig. 8 is a schematic diagram of the path of the main magnetic field of the motor of the present invention.
The reference numbers in the figures are as follows:
the rotor comprises a rotor 1, a stator 2, a rotor support 1-1, a rotor iron core module 1-2, a permanent magnet 1-3, a stator iron core module 2-1, a stator armature winding 2-2, a stator support 2-3, a stator upper support disc 2-31, a stator lower support disc 2-32, an inner ring 2-33 and an outer ring 2-34.
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.
A modular permanent magnet motor structure with an axial magnetic field is shown in figures 1 and 2 and comprises two outer rotors 1 and an inner stator 2 which are symmetrically arranged.
As shown in fig. 3 and 4, the rotor 1 includes a rotor support 1-1 made of non-magnetic material, a plurality of rotor core modules 1-2, permanent magnets 1-3, and a motor shaft 1-4, the rotor support 1-1 is mounted on the motor shaft 1-4, and the rotor core modules 1-2 and the permanent magnets 1-3 are disposed in a sector groove formed in the rotor support 1-1.
The stator 2 comprises a stator core module 2-1, an armature winding 2-2 and a stator support 2-3 made of non-magnetic materials, wherein the stator core module 2-1 and the armature winding 2-2 are arranged in the stator support 2-3.
In this embodiment, the number of pole pairs P of the rotor is 10, and the number of core modules N of the rotor is NrNumber of rotor permanent magnets N20p10, the number of stator core modules Ns is 24, the number of pole pairs P of the motor rotor and the number of rotor core modules NrNumber N of permanent magnets of rotorpThe ratio of 1: 2: 1.
in this embodiment, the rotor support 1-1 is a circular disk-shaped structure, and N is uniformly arranged on one side of the rotor support 1-1pThe permanent magnets 1-3 are arranged between the two adjacent rotor core modules 1-2 to form an iron core-permanent magnet-iron core independent unit, and the thicknesses of the rotor core modules 1-2, the permanent magnets 1-3 and the grooves in the rotor support 1-1 are the same in the axial direction.
The permanent magnets 1-3 are in the shape of a sector, the magnetizing direction is tangential, namely along the circumferential direction, the magnetizing directions of the two rotor permanent magnets 1-3 are opposite, the rotor iron core modules 1-2 are also in the shape of a sector, the rotor iron core modules 1-2 can be arranged into silicon steel sheets or composite soft magnetic materials which are laminated along the radial direction, and the rotor supports 1-1 are made of non-magnetic and non-conductive materials and have enough mechanical strength.
As shown in fig. 5-6, the stator core module 2-1 includes center pillars and crowns at both axial sides, the crown width is greater than the center pillar width and parallel slot openings are formed between crowns of adjacent stator core modules 2-1, stator parallel slots are formed between the center pillars of adjacent stator core modules 2-1, and transition shoulders are formed between the center pillars and crowns.
The segmented stator core modules 2-1 are arranged at equal intervals along the circumferential direction to form stator slots, the copper armature windings 2-2 are directly wound on the middle columns of the stator core modules 2-1, and planes formed by winding coils are perpendicular to the motor rotating shaft 1-4.
The stator support 2-3 comprises a stator upper supporting disc 2-31, a stator lower supporting disc 2-32, an inner ring 2-23 and an outer ring 2-34, wherein the stator upper supporting disc 2-31 and the stator lower supporting disc 2-32 are completely identical in shape and are symmetrically placed, grooves with the number of Ns are formed in the circumferential direction, and the grooves are matched with a tooth crown of the stator iron core module 2-1. Inner and outer rings 2-23 and 2-34 are provided inside and outside the stator upper support disc 2-31 and the stator lower support disc 2-32, respectively.
The stator core module 2-1 can be arranged as a silicon steel sheet or a composite soft magnetic material which is laminated along the radial direction, and the stator bracket 2-3 is a non-magnetic non-conductive material.
When the motor works, the path of a main magnetic field is as shown in fig. 8, the main magnetic field starts from a rotor permanent magnet 1-3 on one side, and after passing through a rotor core module 1-2 in the circumferential direction, the main magnetic field sequentially passes through a first layer of air gap, a stator core module 2-1 and a second layer of air gap in the axial direction, then enters a rotor core module 1-2 and a permanent magnet 1-3 on the other side, and then passes through an adjacent rotor core module 1-2, a stator core module 2-1 and the air gap in a similar path to be closed.
The modularized axial magnetic field permanent magnet motor structure adopts a dual-rotor middle stator, stator iron core and rotor iron core modularized structure, shortens a magnetic flux path, reduces the weight of a stator iron core, increases the power density of the motor, reduces the difficulty and cost of a production and processing process, and is suitable for various occasions such as electric automobiles, wind power generation, elevator traction and the like.
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 (8)

1. A modularized permanent magnet motor with an axial magnetic field is characterized by comprising two symmetrically arranged outer rotors (1) and an inner stator (2), wherein the rotor (1) comprises a rotor support (1-1) made of a non-magnetic-permeability material, a plurality of rotor core modules (1-2), permanent magnets (1-3) and a motor rotating shaft (1-4), the rotor support (1-1) is installed on the motor rotating shaft (1-4), and the rotor core modules (1-2) and the permanent magnets (1-3) are arranged in fan-shaped grooves formed in the rotor support (1-1);
the stator (2) comprises a stator core module (2-1), an armature winding (2-2) and a stator bracket (2-3) made of a non-magnetic material, wherein the stator core module (2-1) and the armature winding (2-2) are arranged in the stator bracket (2-3);
the rotor support (1-1) is of a circular disc-shaped structure, and N are uniformly arranged on one side of the rotor support (1-1)pThe permanent magnets (1-3) are arranged between two adjacent rotor core modules (1-2) to form an iron core-permanent magnet-iron core independent unit.
2. A modular axial field permanent magnet machine according to claim 1, characterized in that the rotor core modules (1-2), the permanent magnets (1-3) and the grooves in the rotor support (1-1) are of the same thickness in the axial direction.
3. The modular axial field permanent magnet machine of claim 1, wherein the number of pole pairs P of the machine rotor and the number of rotor core modules NrNumber N of permanent magnets of rotorpThe ratio of 1: 2: 1.
4. a modular axial field permanent magnet machine according to claim 1, characterized in that the permanent magnets (1-3) are in the shape of sectors, the magnetization direction is tangential, i.e. along the circumferential direction, and the magnetization directions of the two rotor permanent magnets (1-3) are opposite, the rotor core modules (1-2) are also in the shape of sectors, the rotor core modules (1-2) are arranged as radially laminated silicon steel sheets or composite soft magnetic material, and the rotor support (1-1) is made of non-magnetic and non-conductive material.
5. A modular axial field permanent magnet machine according to claim 1, characterized in that the stator core modules (2-1) comprise a center pillar and crowns on both sides in the axial direction, the crown width is larger than the center pillar width and parallel slot openings are formed between crowns of adjacent stator core modules (2-1), stator parallel slots are formed between center pillars of adjacent stator core modules (2-1), and transition shoulders are formed between center pillars and crowns.
6. A modular axial field permanent magnet machine according to claim 5, characterized in that the stator core modules (2-1) are arranged circumferentially at equal distances forming stator slots, the armature windings (2-2) made of copper are wound directly on the center posts of the stator core modules (2-1), the planes formed by the winding coils are perpendicular to the machine axis (1-4).
7. A modular axial field permanent magnet machine according to claim 1, characterized in that the stator frame (2-3) comprises a stator upper supporting disc (2-31), a stator lower supporting disc (2-32), an inner ring (2-23) and an outer ring (2-34), the stator upper supporting disc (2-31) and the stator lower supporting disc (2-32) are completely the same in shape and symmetrically placed, and are circumferentially provided with Ns number of slots, and are matched with the tooth crown of the stator core module (2-1), and the inner ring (2-23) and the outer ring (2-34) are respectively arranged inside and outside the stator upper supporting disc (2-31) and the stator lower supporting disc (2-32).
8. A modular axial field permanent magnet machine according to claim 1, characterized in that the stator core modules (2-1) are arranged as radially laminated silicon steel sheets or composite soft magnetic material, and the stator frame (2-3) is of non-magnetic and non-conductive material.
CN202110563283.0A 2021-05-24 2021-05-24 Modularized axial magnetic field permanent magnet motor Active CN113270985B (en)

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CN113270985B CN113270985B (en) 2022-06-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117879211A (en) * 2024-01-19 2024-04-12 安徽工程大学 Low-rotor-loss axial magnetic field permanent magnet motor rotor and assembly method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016113567A1 (en) * 2015-01-16 2016-07-21 Yasa Motors Limited Axial flux machine
CN112152340A (en) * 2020-08-19 2020-12-29 沈阳工业大学 High-heat-dissipation permanent magnet motor stator with axial-flux axial fixation of yoke-free segmented armature
CN212412878U (en) * 2020-07-21 2021-01-26 合肥工业大学 Disc type hub direct drive motor
CN112467950A (en) * 2020-11-19 2021-03-09 东南大学 Rotor permanent magnet type dual-rotor axial magnetic field hybrid excitation flux switching motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016113567A1 (en) * 2015-01-16 2016-07-21 Yasa Motors Limited Axial flux machine
CN212412878U (en) * 2020-07-21 2021-01-26 合肥工业大学 Disc type hub direct drive motor
CN112152340A (en) * 2020-08-19 2020-12-29 沈阳工业大学 High-heat-dissipation permanent magnet motor stator with axial-flux axial fixation of yoke-free segmented armature
CN112467950A (en) * 2020-11-19 2021-03-09 东南大学 Rotor permanent magnet type dual-rotor axial magnetic field hybrid excitation flux switching motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117879211A (en) * 2024-01-19 2024-04-12 安徽工程大学 Low-rotor-loss axial magnetic field permanent magnet motor rotor and assembly method thereof

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