WO2022134777A1 - Rotor and axial flux motor - Google Patents

Rotor and axial flux motor Download PDF

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Publication number
WO2022134777A1
WO2022134777A1 PCT/CN2021/124590 CN2021124590W WO2022134777A1 WO 2022134777 A1 WO2022134777 A1 WO 2022134777A1 CN 2021124590 W CN2021124590 W CN 2021124590W WO 2022134777 A1 WO2022134777 A1 WO 2022134777A1
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WO
WIPO (PCT)
Prior art keywords
magnetic pole
rotor
magnetic
dummy
permanent magnet
Prior art date
Application number
PCT/CN2021/124590
Other languages
French (fr)
Chinese (zh)
Inventor
黄厚佳
田井呈
袁峥
潘勇生
邵熙芬
Original Assignee
浙江盘毂动力科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202011552241.9A external-priority patent/CN114744799A/en
Priority claimed from CN202121318464.9U external-priority patent/CN215071862U/en
Application filed by 浙江盘毂动力科技有限公司 filed Critical 浙江盘毂动力科技有限公司
Publication of WO2022134777A1 publication Critical patent/WO2022134777A1/en

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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
    • 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/04—Machines with one rotor and two stators

Definitions

  • the present invention relates to the technical field of axial magnetic flux motors, and more particularly, to a rotor and an axial magnetic flux motor.
  • the purpose of the present invention is to reduce the amount of permanent magnets while ensuring the performance of the axial flux motor.
  • the present invention provides a rotor, which includes a rotor support and permanent magnet poles, and also includes a magnetic conductor pole, wherein the permanent magnet poles and the magnetic conductor poles are arranged at intervals around the center of the rotor support;
  • the material of the rotor bracket is a magnetic conductor, the magnetic poles of the magnetic conductor are formed on the rotor bracket, and an installation slot is formed between the two adjacent magnetic poles of the magnetic conductor, and the installation slot is open at the edge of the rotor bracket structure, the permanent magnet poles are installed in the installation slot.
  • the side wall of the installation slot is provided with a snap protrusion
  • the snap protrusion extends along the radial direction of the rotor support
  • the side wall of the permanent magnet pole is provided with a The card slot for the card protrusion.
  • a guard ring is further included, and the guard ring is sleeved on the periphery of the rotor and the permanent magnet magnet.
  • the material of the guard ring is a non-magnetic conductive material.
  • the permanent magnet poles include a plurality of permanent magnet pole pieces, and the plurality of the permanent magnet pole pieces are assembled to form the permanent magnet poles along the radial direction of the rotor support.
  • a plurality of the permanent magnet pole blocks are bonded together by glue to form the permanent magnet poles.
  • the magnetization directions of all the permanent magnet poles are the same, and are all along the thickness direction of the permanent magnet poles.
  • the present invention also provides an axial flux motor, comprising two stators and a rotor, the rotor is located between the two stators, and the rotor is any one of the rotors described above.
  • a closed-loop system is further included, and the closed-loop system is used to inject a target harmonic current into the armature winding, and the target harmonic current is used to weaken or eliminate the pulsating rotation of the axial flux motor. moment.
  • a magnetic circuit is generated between two adjacent permanent magnet poles, but the present invention replaces one of the two adjacent permanent magnet poles with a magnet conducting pole, so that the amount of permanent magnet poles is reduced. half, then the cost of the axial flux motor will be significantly reduced. Since a permanent magnet pole in the magnetic circuit is replaced by a magnetizer pole, the magnetomotive force is reduced by half, but the magnetic permeability of the magnetizer pole is much larger than that of the permanent magnet, so the permeability is greatly improved compared with the original.
  • the length of the air gap can make the magnetic flux density in the present invention close to that in the conventional solution.
  • the present invention also provides a closed-loop system to weaken or eliminate the pulsating torque, thereby improving the torque quality of the axial flux motor.
  • the present invention also provides another rotor, comprising a rotor support, a magnetic pole, and a dummy magnetic pole, the magnetic pole is a permanent magnet material, and the dummy magnetic pole is a magnetically conductive material;
  • the magnetic poles and the dummy magnetic poles are arranged at intervals around the center of the rotor bracket, and both the magnetic poles and the dummy magnetic poles can be mounted on the rotor bracket.
  • the magnetic pole and the dummy magnetic pole have the same shape, structure and size.
  • the air gap of the magnetic circuit formed between the adjacent magnetic poles and the dummy magnetic poles is a preset air gap.
  • the magnetic pole includes a plurality of magnetic pole pieces, and the plurality of magnetic pole pieces are arranged along the radial direction of the rotor support and assembled to form the magnetic pole;
  • the dummy magnetic pole includes a plurality of dummy magnetic pole pieces, and the plurality of dummy magnetic pole pieces are arranged and assembled along the radial direction of the rotor support to form the dummy magnetic pole.
  • the rotor bracket is provided with a magnetic pole installation slot and a dummy magnetic pole installation slot, the magnetic pole is installed in the magnetic pole installation slot, and the dummy magnetic pole is installed in the dummy magnetic pole installation slot.
  • the magnetic pole installation slot is formed with a magnetic pole through opening at the edge of the rotor support, and the magnetic pole enters and exits the magnetic pole installation slot through the magnetic pole through opening;
  • the dummy magnetic pole installation slot is formed with a dummy magnetic pole through opening at the edge of the rotor support, and the dummy magnetic pole enters and exits the dummy magnetic pole installation slot through the dummy magnetic pole through opening.
  • the side wall of the magnetic pole installation slot is provided with a magnetic pole protruding strip portion, and the magnetic pole is provided with a magnetic pole groove that is engaged with the magnetic pole protruding strip portion;
  • a dummy magnetic pole protruding strip portion is provided on the side wall of the dummy magnetic pole installation slot, and a dummy magnetic pole groove is arranged on the dummy magnetic pole which is engaged with the dummy magnetic pole protruding strip portion.
  • the rotor further includes a guard ring, the guard ring is sleeved outside the outer ring of the rotor support, and the magnetic pole and the dummy magnetic pole are respectively locked in the magnetic pole installation slot and the dummy pole is installed in the slot.
  • the rotor is included in an axial flux motor, and the axial flux motor further includes a closed-loop system, and the closed-loop system is used to supply the armature windings of the axial flux motor to the A target harmonic current is injected, and the target pulsating torque generated by the target harmonic current can weaken the pulsating torque of the axial flux motor.
  • the present invention also provides another axial flux motor, which includes a rotor, and the rotor is another rotor described in any one of the above.
  • the magnitude of the magnetic flux density is proportional to the product of the magnetomotive force and the permeance. Since a magnetic pole in the magnetic circuit is replaced by a false magnetic pole, the magnetomotive force is reduced by half, but the material of the false magnetic pole is a magnetically permeable material, and the magnetic permeability of the false magnetic pole is much larger than that of the magnetic pole, so the magnetic permeability in the magnetic circuit is relatively low.
  • the original is greatly improved, and then the air gap of the magnetic circuit is preferably a preset air gap, then the magnetic flux density in the present invention can be made the same as that in the conventional solution.
  • the present invention also provides a closed-loop system to weaken or eliminate the pulsating torque, thereby improving the torque quality of the axial flux motor.
  • FIG. 1 is a schematic structural diagram of a permanent magnet pole provided by a specific embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a rotor support provided by a specific embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a guard ring provided by a specific embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a rotor provided by a specific embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of the assembled rotor and stator provided by a specific embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a magnetic pole provided by a specific embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a dummy magnetic pole provided by a specific embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a rotor support provided by a specific embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a rotor provided by a specific embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a closed-loop system provided by a specific embodiment of the present invention.
  • 1a is the permanent magnet pole
  • 1a-1 is the slot
  • 2a is the rotor bracket
  • 2a-1 is the installation slot
  • 2a-2 is the clip
  • 2a-3 is the magnet pole
  • 3a is the guard ring
  • 4a is the stator core
  • 5a is the stator winding
  • 1b is the magnetic pole
  • 1b-1 is the magnetic pole groove
  • 2b is the false magnetic pole
  • 2b-1 is the false magnetic pole groove
  • 3b is the rotor bracket
  • 3b-1 is the magnetic pole installation slot
  • 3b-2 is the false magnetic pole installation slot
  • 4b is the magnetic pole installation slot. guard ring.
  • the core of the present invention is to be able to halve the amount of permanent magnet poles while ensuring that the axial flux motor has the same performance as the traditional axial flux motor.
  • the rotor disclosed in the present invention includes a rotor support 2a and permanent magnet poles 1a, in particular, also includes magnetizer poles 2a-3.
  • the permanent magnet poles 1a and the magnetizer poles 2a-3 are arranged at intervals around the center of the rotor bracket 2a. Then, a magnetic circuit will be generated between the adjacent permanent magnet poles 1a and the magnetizer poles 2a-3.
  • the magnitude of the magnetic flux density is proportional to the product of the magnetomotive force and the permeance, and the magnetomotive force is approximately proportional to the length of the magnetization direction of the permanent magnet pole 1a.
  • a piece of permanent magnet pole 1a in the magnetic circuit is replaced by a magnet conductor pole 2a-3, then the magnetomotive force is reduced by half, but the permeability of the magnet conductor pole 2a-3 is much larger than that of the permanent magnet, so the magnetic permeability is relatively small. It turned out to be a huge increase. Then, by selecting the length of the air gap reasonably, the magnetic flux density in the present invention can be made close to the magnetic flux density in the conventional solution. Therefore, the present invention also ensures that the axial flux motor has the same performance as the conventional axial flux motor while halving the amount of the permanent magnet poles 1a.
  • the material of the rotor bracket 2a is preferably a magnetic conductor, that is, the entire rotor bracket 2a is a magnetic conductor.
  • Several permanent magnet poles 1a are arranged around the center of the rotor support 2a.
  • the part of the rotor bracket 2a located between two adjacent permanent magnet poles 1a is the above-mentioned magnet conductor poles 2a-3, so it can also be understood that the magnet conductor poles 2a-3 are formed on the rotor bracket 2a.
  • 1a2a permanent magnet poles 1a are provided in the conventional rotor, but only 6 permanent magnet poles 1a are required in the present invention.
  • the six permanent magnet poles 1a may be arranged on the rotor support 2a made of magnetically conductive material.
  • the rotor structure in the present invention simplifies the manufacturing difficulty and improves the manufacturing efficiency.
  • the permanent magnet pole 1a in the present invention is assembled from a plurality of pieces of the permanent magnet pole 1a.
  • the plurality of permanent magnet poles 1a are arranged and assembled along the radial direction of the rotor support 2a, and then bonded together by special glue.
  • the permanent magnet pole 1a assembled from a plurality of pieces of the permanent magnet pole 1a can reduce the eddy current loss.
  • the installation method of the permanent magnet pole 1a and the rotor support 2a is as follows: an installation groove 2a-1 is formed between two adjacent magnet conductor poles on the rotor support 2a, and the installation groove 2a-1 extends to the edge of the rotor support 2a . That is, the installation groove 2a-1 has an open structure at the edge of the rotor bracket 2a, so that the permanent magnet pole 1a can be installed into the installation groove 2a-1 through the open structure.
  • a snap protrusion 2a-2 is provided on the side wall of the mounting groove 2a-1, and the snap protrusion 2a-2 is strip-shaped and extends along the length of the rotor bracket 2a. radial extension.
  • a clamping slot 1a-1 is provided on the side wall of the permanent magnet pole 1a, and the clamping slot 1a-1 also extends along the radial direction of the rotor bracket 2a.
  • the clamping groove 1a-1 is aligned with the clamping protrusion 2a-2 in advance, and then the permanent magnet pole 1a is pushed into the installation groove 2a-1 along the radial direction of the rotor bracket 2a.
  • the present invention also provides a guard ring 3a, which is sleeved on the rotor support 2a and the periphery of the permanent magnet poles to further improve the firmness of the connection between the permanent magnet poles 1a and the rotor support 2a.
  • the present invention sets the material of the guard ring 3a as a non-magnetic conductive material.
  • the magnetization directions of two adjacent permanent magnet poles 1a are opposite, while in the present invention, the magnetization directions of all permanent magnet poles 1a are the same, and they are all along the thickness direction of the permanent magnet pole 1a, or Along the axial direction of the axial flux motor, in this way, the manufacturing difficulty is further reduced and the manufacturing efficiency is improved.
  • the invention also discloses an axial magnetic flux motor, which comprises two stators and a rotor.
  • the rotor is arranged between the two stators.
  • the rotor is the rotor described in any one of the above.
  • the above-mentioned rotor has the above-mentioned effect, and the axial flux motor having the above-mentioned rotor also has the above-mentioned effect, so it is not repeated here.
  • the applicant has set up a closed-loop system capable of inputting a target harmonic current to the armature winding according to the rotational speed and torque of the axial flux motor, the target harmonic current will generate a target harmonic magnetic field, the target harmonic current Harmonic magnetic fields create a pulsating torque component that attenuates or cancels the pulsating torque of an axial flux motor.
  • the rotor disclosed in the present invention includes a rotor support 3b and a magnetic pole 1b, in particular, also includes a dummy magnetic pole 2b.
  • the magnetic pole 1b is made of permanent magnet material
  • the dummy magnetic pole 2b is made of magnetically conductive material
  • the rotor bracket 3b is made of non-magnetically conductive material.
  • the magnetic poles 1b and the dummy magnetic poles 2b are arranged at intervals around the center of the rotor holder 3b. Both the magnetic pole 1b and the dummy magnetic pole 2b can be mounted on the rotor support 3b.
  • the number of magnetic poles 1b or the number of dummy magnetic poles 2b is the number of pole pairs of the motor.
  • the dummy magnetic poles 2b are magnetically conductive materials, a magnetic circuit is formed between the adjacent magnetic poles 1b and the dummy magnetic poles 2b.
  • all the magnetic poles 1b are made of permanent magnet material, and a magnetic circuit is generated between the two adjacent magnetic poles 1b, while the present invention replaces one of the adjacent two magnetic poles 1b with a dummy magnetic pole 2b , in this way, the amount of magnetic pole 1b is reduced by half, which will significantly reduce the cost of the axial flux motor.
  • the magnitude of the magnetic flux density is proportional to the product of the magnetomotive force and the magnetic permeability, and the magnetomotive force is approximately proportional to the length of the magnetization direction of the magnetic pole 1b.
  • a magnetic pole 1b in the magnetic circuit is replaced by a dummy magnetic pole 2b, so the magnetomotive force is reduced by half, but the material of the dummy magnetic pole 2b is a magnetically conductive material, and the magnetic permeability of the dummy magnetic pole 2b is much larger than that of the magnetic pole 1b, so the The magnetic permeability in the magnetic circuit formed between the adjacent magnetic pole 1b and the dummy magnetic pole 2b is greatly improved compared with the original.
  • the magnetic permeability is related to the length of the air gap in the magnetic circuit.
  • the smaller the air gap length, the larger the magnetic permeability. Therefore, the air gap in the magnetic circuit is set as a preset air gap, so that the magnetic flux density of the magnetic circuit formed between the adjacent magnetic poles 1b and the dummy magnetic poles 2b is the same as that formed between the adjacent two magnetic poles 1b in the prior art.
  • the magnetic flux density of the magnetic circuit is equal.
  • the present invention defines that the magnetic pole 1b and the dummy magnetic pole 2b have the same shape, structure and size.
  • the present invention defines that the magnetic pole 1b is assembled from a plurality of magnetic pole 1b blocks.
  • the plurality of magnetic pole 1b blocks are arranged and assembled along the radial direction of the rotor support 3b, and are then bonded into a complete magnetic pole 1b by using special glue.
  • the dummy pole 2b is assembled from a plurality of dummy poles 2b.
  • a plurality of dummy poles 2b are arranged and assembled along the radial direction of the rotor support 3b, and then bonded to form a complete dummy pole 2b by using special glue.
  • the eddy current loss can be reduced by the way of assembly.
  • the magnetization directions of the two adjacent magnetic poles 1b are opposite, while the magnetization directions of all the magnetic poles 1b in the present invention are the same, and they are all along the thickness direction of the magnetic pole 1b, or in other words along the direction of the thickness of the magnetic pole 1b. In this way, the manufacturing difficulty is reduced and the manufacturing efficiency is improved.
  • the present invention is provided with a magnetic pole installation groove 3b-1 and a dummy magnetic pole installation groove 3b-2 on the rotor support 3b.
  • the magnetic pole 1b is installed in the magnetic pole installation groove 3b-1
  • the dummy magnetic pole 2b is installed in the dummy magnetic pole installation groove 3b-2.
  • the present invention defines that the magnetic pole installation slot 3b-1 is formed with a magnetic pole through opening at the edge of the rotor bracket 3b, and the magnetic pole 1b can enter and exit the magnetic pole installation slot 3b-1 through the magnetic pole through opening.
  • the dummy magnetic pole mounting slot 3b-2 has a dummy magnetic pole through opening formed at the edge of the rotor holder 3b, and the dummy magnetic pole 2b can enter and exit the dummy magnetic pole mounting slot 3b-2 through the dummy magnetic pole through opening.
  • a magnetic pole protruding strip portion is also provided on the side wall of the magnetic pole installation groove 3b-1, and the magnetic pole protruding strip portion extends along the radial direction of the rotor bracket 3b.
  • the magnetic pole 1b is provided with a magnetic pole groove 1b-1 which is engaged with the magnetic pole protruding strip portion.
  • the magnetic pole groove 1b-1 extends along the radial direction of the rotor support 3b, and both ends of the magnetic pole groove 1b-1 are open structures.
  • a dummy magnetic pole protruding strip portion is also provided on the side wall of the dummy magnetic pole mounting groove 3b-2, and the dummy magnetic pole protruding strip portion extends along the radial direction of the rotor bracket 3b.
  • the dummy magnetic pole 2b is provided with a dummy magnetic pole groove 2b-1 which is engaged with the dummy magnetic pole protruding strip portion.
  • the dummy pole groove 2b-1 extends along the radial direction of the rotor support 3b, and both ends of the dummy pole groove 2b-1 are open structures.
  • the dummy magnetic pole protruding strip portion is aligned with the dummy magnetic pole groove 2b-1, and then the dummy magnetic pole 2b can be pushed into the center of the rotor holder 3b.
  • the present invention also adds a guard ring 4b, which is sleeved on the outer circle of the rotor support 3b to lock the magnetic pole 1b and the dummy magnetic pole 2b in the magnetic pole installation groove 3b-1 and the false magnetic pole installation groove 3b-2 Inside.
  • the present invention sets the material of the guard ring 4b as a non-magnetic conductive material.
  • a closed-loop system is added in the present invention, and the closed-loop system can input target harmonics to the armature winding through the controller according to the speed and torque fed back by the axial flux motor. current.
  • the target harmonic current will generate a target harmonic magnetic field, and the target harmonic magnetic field will form a pulsating torque component, and the pulsating torque component will weaken or eliminate the pulsating torque of the axial flux motor.
  • the invention also discloses an axial magnetic flux motor, which comprises a rotor, and the rotor is any one of the above-mentioned rotors.
  • the above-mentioned rotor has the above-mentioned effect, and the axial flux motor having the above-mentioned rotor also has the above-mentioned effect, so it is not repeated here.

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

Abstract

A rotor and an axial flux motor. The rotor comprises a rotor support (2a) and permanent magnet poles (1a), and further comprises magnetic conductor magnet poles (2a-3); the permanent magnet poles (1a) and the magnetic conductor magnet poles (2a-3) are arranged at intervals around the center of the rotor support (2a); and the material of the rotor support (2a) is a magnetic conductor, and the magnetic conductor magnet poles (2a-3) are formed to the rotor support (2a). One of two adjacent permanent magnet poles (1a) is replaced with a magnetic conductor magnet pole (2a-3), and in this way, the number of the permanent magnet poles (1a) is reduced by half, and thus the shaft cost is significantly reduced. By replacing one permanent magnet pole (1a) in a magnetic circuit with a magnetic conductor magnet pole (2a-3), the magnetomotive force is reduced by half, but the magnetic permeability of the magnetic conductor magnet poles (2a-3) is much greater than that of permanent magnets, and thus the magnetic permeability is greatly increased compared with the original magnetic permeability, and then by reasonably selecting the length of an air gap, the magnetic flux density in the present solution can be close to the magnetic flux density in a conventional solution.

Description

一种转子及一种轴向磁通电机A rotor and an axial flux motor
本申请要求以下中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims priority to the following Chinese patent applications, the entire contents of which are incorporated herein by reference.
申请号：202011552241.9Application number: 202011552241.9
申请日：2020年12月24日Application Date: December 24, 2020
发明创造名称：一种转子及一种轴向磁通电机Invention and creation name: a rotor and an axial flux motor
申请号：202121318464.9Application number: 202121318464.9
申请日：2021年06月11日Application date: June 11, 2021
发明创造名称：一种转子及一种轴向磁通电机Invention and creation name: a rotor and an axial flux motor
技术领域technical field
本发明涉及轴向磁通电机技术领域，更具体地说，涉及一种转子及一种轴向磁通电机。The present invention relates to the technical field of axial magnetic flux motors, and more particularly, to a rotor and an axial magnetic flux motor.
背景技术Background technique
目前，永磁体材料大多为稀土材料，近年来随着稀土材料成本不断升高，电机成本也不断攀升，对于轴向磁通电机，永磁体材料成本达到总制造成本的40％左右。At present, most permanent magnet materials are rare earth materials. In recent years, with the rising cost of rare earth materials, the cost of motors has also continued to rise. For axial flux motors, the cost of permanent magnet materials reaches about 40% of the total manufacturing cost.
因此，如何减少永磁体的用量，同时确保轴向磁通电机的性能，是本领域技术人员亟待解决的关键性问题。Therefore, how to reduce the amount of permanent magnets while ensuring the performance of the axial flux motor is a key problem to be solved urgently by those skilled in the art.
发明内容SUMMARY OF THE INVENTION
本发明的目的是减少永磁体的用量，同时确保轴向磁通电机的性能。The purpose of the present invention is to reduce the amount of permanent magnets while ensuring the performance of the axial flux motor.
为实现上述目的，本发明提供一种转子，包括转子支架和永磁体磁极，还包括导磁体磁极，所述永磁体磁极与所述导磁体磁极围绕所述转子支架的中心间隔排布；In order to achieve the above object, the present invention provides a rotor, which includes a rotor support and permanent magnet poles, and also includes a magnetic conductor pole, wherein the permanent magnet poles and the magnetic conductor poles are arranged at intervals around the center of the rotor support;
所述转子支架的材质为导磁体，所述导磁体磁极形成于所述转子支架，相 邻两个所述导磁体磁极之间形成安装槽，该安装槽在所述转子支架的边缘部位为开放结构，所述永磁体磁极安装于所述安装槽内。The material of the rotor bracket is a magnetic conductor, the magnetic poles of the magnetic conductor are formed on the rotor bracket, and an installation slot is formed between the two adjacent magnetic poles of the magnetic conductor, and the installation slot is open at the edge of the rotor bracket structure, the permanent magnet poles are installed in the installation slot.
本发明其中一个实施例中，所述安装槽的侧壁上设置有卡凸，所述卡凸沿着所述转子支架的径向延伸，所述永磁体磁极的侧壁上设置有与所述卡凸适配的卡槽。In one embodiment of the present invention, the side wall of the installation slot is provided with a snap protrusion, the snap protrusion extends along the radial direction of the rotor support, and the side wall of the permanent magnet pole is provided with a The card slot for the card protrusion.
本发明其中一个实施例中，还包括防护环，所述防护环套设在所述转子与所述永磁体磁体的周缘上。In one embodiment of the present invention, a guard ring is further included, and the guard ring is sleeved on the periphery of the rotor and the permanent magnet magnet.
本发明其中一个实施例中，所述防护环的材质为非导磁材质。In one embodiment of the present invention, the material of the guard ring is a non-magnetic conductive material.
本发明其中一个实施例中，所述永磁体磁极包括多个永磁体磁极块，多个所述永磁体磁极块沿着所述转子支架的径向组装成所述永磁体磁极。In one embodiment of the present invention, the permanent magnet poles include a plurality of permanent magnet pole pieces, and the plurality of the permanent magnet pole pieces are assembled to form the permanent magnet poles along the radial direction of the rotor support.
本发明其中一个实施例中，多个所述永磁体磁极块之间通过胶粘接为所述永磁体磁极。In one embodiment of the present invention, a plurality of the permanent magnet pole blocks are bonded together by glue to form the permanent magnet poles.
本发明其中一个实施例中，所有的所述永磁体磁极的充磁方向相同，且均沿着所述永磁体磁极的厚度方向。In one embodiment of the present invention, the magnetization directions of all the permanent magnet poles are the same, and are all along the thickness direction of the permanent magnet poles.
本发明还提供了一种轴向磁通电机，包括两个定子和一个转子，所述转子位于两个所述定子之间，所述转子为上述任意一项所述的一种转子。The present invention also provides an axial flux motor, comprising two stators and a rotor, the rotor is located between the two stators, and the rotor is any one of the rotors described above.
本发明其中一个实施例中，还包括闭环***，所述闭环***用于向电枢绕组注入目标谐波电流，所述目标谐波电流用于削弱或消除所述轴向磁通电机的脉动转矩。In one embodiment of the present invention, a closed-loop system is further included, and the closed-loop system is used to inject a target harmonic current into the armature winding, and the target harmonic current is used to weaken or eliminate the pulsating rotation of the axial flux motor. moment.
在传统的转子中，相邻的两个永磁体磁极之间产生磁回路，而本发明将相邻的两个永磁体磁极中的一个更换为了导磁体磁极，如此，永磁体磁极的用量减少了一半，那么就会显著降低轴向磁通电机的成本。由于将磁回路中的一块永磁体磁极用导磁体磁极代替，磁动势减小了一半，但导磁体磁极的磁导率远大于永磁体，因此磁导较原来大幅度提升，再通过合理选取气隙的长度，那么就可以使本发明中的磁通密度与传统方案中的磁通密度接近。本发明还设置了闭环***来削弱或消除脉动转矩，从而提高轴向磁通电机的转矩品质。In the traditional rotor, a magnetic circuit is generated between two adjacent permanent magnet poles, but the present invention replaces one of the two adjacent permanent magnet poles with a magnet conducting pole, so that the amount of permanent magnet poles is reduced. half, then the cost of the axial flux motor will be significantly reduced. Since a permanent magnet pole in the magnetic circuit is replaced by a magnetizer pole, the magnetomotive force is reduced by half, but the magnetic permeability of the magnetizer pole is much larger than that of the permanent magnet, so the permeability is greatly improved compared with the original. The length of the air gap can make the magnetic flux density in the present invention close to that in the conventional solution. The present invention also provides a closed-loop system to weaken or eliminate the pulsating torque, thereby improving the torque quality of the axial flux motor.
本发明还提供了另一种转子，包括转子支架和磁极，还包括假磁极，所述磁极为永磁材料，所述假磁极为导磁材料；The present invention also provides another rotor, comprising a rotor support, a magnetic pole, and a dummy magnetic pole, the magnetic pole is a permanent magnet material, and the dummy magnetic pole is a magnetically conductive material;
所述磁极与所述假磁极围绕所述转子支架的中心间隔排布，且所述磁极与 所述假磁极均能够安装于所述转子支架上。The magnetic poles and the dummy magnetic poles are arranged at intervals around the center of the rotor bracket, and both the magnetic poles and the dummy magnetic poles can be mounted on the rotor bracket.
本发明其中一个实施例中，所述磁极与所述假磁极的形状结构和尺寸相同。In one embodiment of the present invention, the magnetic pole and the dummy magnetic pole have the same shape, structure and size.
本发明其中一个实施例中，相邻的所述磁极与所述假磁极之间形成的磁回路的气隙为预设气隙。In one embodiment of the present invention, the air gap of the magnetic circuit formed between the adjacent magnetic poles and the dummy magnetic poles is a preset air gap.
本发明其中一个实施例中，所述磁极包括多个磁极块，多个所述磁极块沿所述转子支架的径向排布组装成所述磁极；In one embodiment of the present invention, the magnetic pole includes a plurality of magnetic pole pieces, and the plurality of magnetic pole pieces are arranged along the radial direction of the rotor support and assembled to form the magnetic pole;
所述假磁极包括多个假磁极块，多个所述假磁极块沿着所述转子支架的径向排布组装成所述假磁极。The dummy magnetic pole includes a plurality of dummy magnetic pole pieces, and the plurality of dummy magnetic pole pieces are arranged and assembled along the radial direction of the rotor support to form the dummy magnetic pole.
本发明其中一个实施例中，所述转子支架上设置有磁极安装槽和假磁极安装槽，所述磁极安装于所述磁极安装槽内，所述假磁极安装于所述假磁极安装槽内。In one embodiment of the present invention, the rotor bracket is provided with a magnetic pole installation slot and a dummy magnetic pole installation slot, the magnetic pole is installed in the magnetic pole installation slot, and the dummy magnetic pole is installed in the dummy magnetic pole installation slot.
本发明其中一个实施例中，所述磁极安装槽在所述转子支架的边缘部形成有磁极通口，所述磁极通过该磁极通口进出所述磁极安装槽；In one embodiment of the present invention, the magnetic pole installation slot is formed with a magnetic pole through opening at the edge of the rotor support, and the magnetic pole enters and exits the magnetic pole installation slot through the magnetic pole through opening;
所述假磁极安装槽在所述转子支架的边缘部形成有假磁极通口，所述假磁极通过该假磁极通口进出所述假磁极安装槽。The dummy magnetic pole installation slot is formed with a dummy magnetic pole through opening at the edge of the rotor support, and the dummy magnetic pole enters and exits the dummy magnetic pole installation slot through the dummy magnetic pole through opening.
本发明其中一个实施例中，所述磁极安装槽的侧壁上设置有磁极凸条部，所述磁极上设置有与所述磁极凸条部卡配的磁极凹槽；In one embodiment of the present invention, the side wall of the magnetic pole installation slot is provided with a magnetic pole protruding strip portion, and the magnetic pole is provided with a magnetic pole groove that is engaged with the magnetic pole protruding strip portion;
所述假磁极安装槽的侧壁上设置有假磁极凸条部，所述假磁极上设置有与所述假磁极凸条部卡配的假磁极凹槽。A dummy magnetic pole protruding strip portion is provided on the side wall of the dummy magnetic pole installation slot, and a dummy magnetic pole groove is arranged on the dummy magnetic pole which is engaged with the dummy magnetic pole protruding strip portion.
本发明其中一个实施例中，所述转子还包括防护环，所述防护环套设在所述转子支架的外圈外，将所述磁极和所述假磁极分别锁紧在所述磁极安装槽和所述假磁极安装槽内。In one embodiment of the present invention, the rotor further includes a guard ring, the guard ring is sleeved outside the outer ring of the rotor support, and the magnetic pole and the dummy magnetic pole are respectively locked in the magnetic pole installation slot and the dummy pole is installed in the slot.
本发明其中一个实施例中，所述转子包含于轴向磁通电机内，所述轴向磁通电机还包括闭环***，所述闭环***用于向所述轴向磁通电机的电枢绕组注入目标谐波电流，所述目标谐波电流产生的目标脉动转矩能够削弱所述轴向磁通电机的脉动转矩。In one embodiment of the present invention, the rotor is included in an axial flux motor, and the axial flux motor further includes a closed-loop system, and the closed-loop system is used to supply the armature windings of the axial flux motor to the A target harmonic current is injected, and the target pulsating torque generated by the target harmonic current can weaken the pulsating torque of the axial flux motor.
本发明还提供了另一种轴向磁通电机，包括转子，所述转子为上述任意一项所述的另一种转子。The present invention also provides another axial flux motor, which includes a rotor, and the rotor is another rotor described in any one of the above.
在传统的转子中，相邻的两个磁极之间产生磁回路，而本发明将相邻的两个磁极中的一个更换为了假磁极，如此，磁极的用量减少了一半，那么就会显著降低轴向磁通电机的成本。In the traditional rotor, a magnetic circuit is generated between two adjacent magnetic poles, but the present invention replaces one of the adjacent two magnetic poles with a dummy magnetic pole, so that the amount of magnetic poles is reduced by half, which will significantly reduce the Cost of Axial Flux Motors.
磁通密度的大小与磁动势和磁导的乘积成正比。由于将磁回路中的一块磁极用假磁极代替，因此磁动势减小了一半，但假磁极的材质为导磁材料，假磁极的磁导率远大于磁极，因此磁回路中的磁导较原来大幅度提升，再将磁回路的气隙优选为预设气隙，那么就可以使本发明中的磁通密度与传统方案中的磁通密度相同。另外，本发明还设置了闭环***来削弱或消除脉动转矩，从而提高轴向磁通电机的转矩品质。The magnitude of the magnetic flux density is proportional to the product of the magnetomotive force and the permeance. Since a magnetic pole in the magnetic circuit is replaced by a false magnetic pole, the magnetomotive force is reduced by half, but the material of the false magnetic pole is a magnetically permeable material, and the magnetic permeability of the false magnetic pole is much larger than that of the magnetic pole, so the magnetic permeability in the magnetic circuit is relatively low. The original is greatly improved, and then the air gap of the magnetic circuit is preferably a preset air gap, then the magnetic flux density in the present invention can be made the same as that in the conventional solution. In addition, the present invention also provides a closed-loop system to weaken or eliminate the pulsating torque, thereby improving the torque quality of the axial flux motor.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.
图1为本发明一具体实施例提供的永磁体磁极的结构示意图；1 is a schematic structural diagram of a permanent magnet pole provided by a specific embodiment of the present invention;
图2为本发明一具体实施例提供的转子支架的结构示意图；2 is a schematic structural diagram of a rotor support provided by a specific embodiment of the present invention;
图3为本发明一具体实施例提供的防护环的结构示意图；3 is a schematic structural diagram of a guard ring provided by a specific embodiment of the present invention;
图4为本发明一具体实施例提供的转子的结构示意图；4 is a schematic structural diagram of a rotor provided by a specific embodiment of the present invention;
图5为本发明一具体实施例提供的转子与定子组装后的结构示意图；5 is a schematic structural diagram of the assembled rotor and stator provided by a specific embodiment of the present invention;
图6为本发明一具体实施例提供的磁极的结构示意图；6 is a schematic structural diagram of a magnetic pole provided by a specific embodiment of the present invention;
图7为本发明一具体实施例提供的假磁极的结构示意图；7 is a schematic structural diagram of a dummy magnetic pole provided by a specific embodiment of the present invention;
图8为本发明一具体实施例提供的转子支架的结构示意图；FIG. 8 is a schematic structural diagram of a rotor support provided by a specific embodiment of the present invention;
图9为本发明一具体实施例提供的转子的结构示意图；9 is a schematic structural diagram of a rotor provided by a specific embodiment of the present invention;
图10为本发明一具体实施例提供的闭环***的示意图。FIG. 10 is a schematic diagram of a closed-loop system provided by a specific embodiment of the present invention.
其中：其中，1a为永磁体磁极、1a-1为卡槽、2a为转子支架、2a-1为安装槽、2a-2为卡凸、2a-3为导磁体磁极、3a为防护环、4a为定子铁芯、5a为 定子绕组；Wherein: 1a is the permanent magnet pole, 1a-1 is the slot, 2a is the rotor bracket, 2a-1 is the installation slot, 2a-2 is the clip, 2a-3 is the magnet pole, 3a is the guard ring, 4a is the stator core, 5a is the stator winding;
1b为磁极、1b-1为磁极凹槽、2b为假磁极、2b-1为假磁极凹槽、3b为转子支架、3b-1为磁极安装槽、3b-2为假磁极安装槽、4b为防护环。1b is the magnetic pole, 1b-1 is the magnetic pole groove, 2b is the false magnetic pole, 2b-1 is the false magnetic pole groove, 3b is the rotor bracket, 3b-1 is the magnetic pole installation slot, 3b-2 is the false magnetic pole installation slot, and 4b is the magnetic pole installation slot. guard ring.
具体实施方式Detailed ways
本发明的核心是能够将永磁体磁极的用量减半，同时确保轴向磁通电机与传统的轴向磁通电机具有同等的性能。The core of the present invention is to be able to halve the amount of permanent magnet poles while ensuring that the axial flux motor has the same performance as the traditional axial flux motor.
为了使本领域的技术人员更好地理解本发明的技术方案，下面结合附图和实施方式对本发明作进一步的详细说明。In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
实施例一Example 1
请参考图1至图5，本发明公开的转子包括转子支架2a和永磁体磁极1a，特别地，还包括导磁体磁极2a-3。永磁体磁极1a与导磁体磁极2a-3围绕转子支架2a的中心间隔排布。那么，相邻的永磁体磁极1a与导磁体磁极2a-3之间会产生磁回路。在传统的转子中，相邻的两个永磁体磁极1a之间产生磁回路，而本发明将相邻的两个永磁体磁极1a中的一个更换为了导磁体磁极2a-3，如此，永磁体磁极1a的用量减少了一半，那么就会显著降低轴向磁通电机的成本。Please refer to FIG. 1 to FIG. 5 , the rotor disclosed in the present invention includes a rotor support 2a and permanent magnet poles 1a, in particular, also includes magnetizer poles 2a-3. The permanent magnet poles 1a and the magnetizer poles 2a-3 are arranged at intervals around the center of the rotor bracket 2a. Then, a magnetic circuit will be generated between the adjacent permanent magnet poles 1a and the magnetizer poles 2a-3. In the conventional rotor, a magnetic circuit is generated between two adjacent permanent magnet poles 1a, but the present invention replaces one of the two adjacent permanent magnet poles 1a with a magnetic conductor pole 2a-3, so that the permanent magnet The amount of pole 1a is reduced by half, which can significantly reduce the cost of the axial flux motor.
另外需要说明的是，磁通密度的大小与磁动势和磁导的乘积成正比，而磁动势与永磁体磁极1a的磁化方向长度近似呈正比。本发明将磁回路中的一块永磁体磁极1a用导磁体磁极2a-3代替，那么磁动势减小了一半，但导磁体磁极2a-3的磁导率远大于永磁体，因此磁导较原来大幅度提升。再通过合理选取气隙的长度，那么就可以使本发明中的磁通密度与传统方案中的磁通密度接近。因此，本发明在将永磁体磁极1a的用量减半的同时，还确保了轴向磁通电机与传统的轴向磁通电机具有同等的性能。In addition, it should be noted that the magnitude of the magnetic flux density is proportional to the product of the magnetomotive force and the permeance, and the magnetomotive force is approximately proportional to the length of the magnetization direction of the permanent magnet pole 1a. In the present invention, a piece of permanent magnet pole 1a in the magnetic circuit is replaced by a magnet conductor pole 2a-3, then the magnetomotive force is reduced by half, but the permeability of the magnet conductor pole 2a-3 is much larger than that of the permanent magnet, so the magnetic permeability is relatively small. It turned out to be a huge increase. Then, by selecting the length of the air gap reasonably, the magnetic flux density in the present invention can be made close to the magnetic flux density in the conventional solution. Therefore, the present invention also ensures that the axial flux motor has the same performance as the conventional axial flux motor while halving the amount of the permanent magnet poles 1a.
在本发明一具体实施例中，将转子支架2a的材质优选为导磁体，即整个转子支架2a为导磁体。若干个永磁体磁极1a围绕转子支架2a的中心布置。 转子支架2a位于相邻两个永磁体磁极1a之间的部分即为上文中的导磁体磁极2a-3，因此也可以理解为导磁体磁极2a-3形成于转子支架2a。比如在传统的转子中设置有1a2a个永磁体磁极1a，而在本发明中仅需要6个永磁体磁极1a。将6个永磁体磁极1a设置在导磁材质的转子支架2a上即可。本发明中的转子结构简化了制作难度，提高了制作效率。In a specific embodiment of the present invention, the material of the rotor bracket 2a is preferably a magnetic conductor, that is, the entire rotor bracket 2a is a magnetic conductor. Several permanent magnet poles 1a are arranged around the center of the rotor support 2a. The part of the rotor bracket 2a located between two adjacent permanent magnet poles 1a is the above-mentioned magnet conductor poles 2a-3, so it can also be understood that the magnet conductor poles 2a-3 are formed on the rotor bracket 2a. For example, 1a2a permanent magnet poles 1a are provided in the conventional rotor, but only 6 permanent magnet poles 1a are required in the present invention. The six permanent magnet poles 1a may be arranged on the rotor support 2a made of magnetically conductive material. The rotor structure in the present invention simplifies the manufacturing difficulty and improves the manufacturing efficiency.
本发明中的永磁体磁极1a由多个永磁体磁极1a块组装而成。多个永磁体磁极1a块沿着转子支架2a的径向排布、组装，之后利用专用胶粘接为一体即可。由多个永磁体磁极1a块组装而成的永磁体磁极1a能够减小涡流损耗。The permanent magnet pole 1a in the present invention is assembled from a plurality of pieces of the permanent magnet pole 1a. The plurality of permanent magnet poles 1a are arranged and assembled along the radial direction of the rotor support 2a, and then bonded together by special glue. The permanent magnet pole 1a assembled from a plurality of pieces of the permanent magnet pole 1a can reduce the eddy current loss.
永磁体磁极1a与转子支架2a的安装方式如下：在转子支架2a上相邻的两个导磁体磁极之间形成安装槽2a-1，并且安装槽2a-1一直延伸到转子支架2a的边缘部。即安装槽2a-1在转子支架2a的边缘部为开放结构，如此，便可将永磁体磁极1a通过该开放结构安装进入到安装槽2a-1中。The installation method of the permanent magnet pole 1a and the rotor support 2a is as follows: an installation groove 2a-1 is formed between two adjacent magnet conductor poles on the rotor support 2a, and the installation groove 2a-1 extends to the edge of the rotor support 2a . That is, the installation groove 2a-1 has an open structure at the edge of the rotor bracket 2a, so that the permanent magnet pole 1a can be installed into the installation groove 2a-1 through the open structure.
为了确保安装的牢固性，本发明还作了如下设置：在安装槽2a-1的侧壁上设置了卡凸2a-2，该卡凸2a-2为条状，且沿着转子支架2a的径向延伸。对应地，在永磁体磁极1a的侧壁上设置了卡槽1a-1，该卡槽1a-1也沿着转子支架2a的径向延伸。在安装时，事先使卡槽1a-1对准卡凸2a-2，之后沿着转子支架2a的径向将永磁体磁极1a推入到安装槽2a-1中。In order to ensure the firmness of the installation, the present invention also provides the following arrangement: a snap protrusion 2a-2 is provided on the side wall of the mounting groove 2a-1, and the snap protrusion 2a-2 is strip-shaped and extends along the length of the rotor bracket 2a. radial extension. Correspondingly, a clamping slot 1a-1 is provided on the side wall of the permanent magnet pole 1a, and the clamping slot 1a-1 also extends along the radial direction of the rotor bracket 2a. During installation, the clamping groove 1a-1 is aligned with the clamping protrusion 2a-2 in advance, and then the permanent magnet pole 1a is pushed into the installation groove 2a-1 along the radial direction of the rotor bracket 2a.
为了进一步提高安装的牢固性，本发明还设置了防护环3a，防护环3a套设在转子支架2a以及永磁体磁极的周缘上，以进一步提高永磁体磁极1a与转子支架2a连接的牢固性。为了防止漏磁，本发明将防护环3a的材质设置为非导磁材质。In order to further improve the firmness of installation, the present invention also provides a guard ring 3a, which is sleeved on the rotor support 2a and the periphery of the permanent magnet poles to further improve the firmness of the connection between the permanent magnet poles 1a and the rotor support 2a. In order to prevent magnetic leakage, the present invention sets the material of the guard ring 3a as a non-magnetic conductive material.
对于传统的转子，相邻的两个永磁体磁极1a的充磁方向相反，而本发明中所有的永磁体磁极1a的充磁方向相同，且均沿着永磁体磁极1a的厚度方向，或者说沿着轴向磁通电机的轴向，如此，进一步降低了制作难度，提高了制作效率。For a conventional rotor, the magnetization directions of two adjacent permanent magnet poles 1a are opposite, while in the present invention, the magnetization directions of all permanent magnet poles 1a are the same, and they are all along the thickness direction of the permanent magnet pole 1a, or Along the axial direction of the axial flux motor, in this way, the manufacturing difficulty is further reduced and the manufacturing efficiency is improved.
本发明还公开了一种轴向磁通电机，该电机包括两个定子和一个转子。转子设置在两个定子之间。该转子为上述任意一项所述的转子。上述转子具有上述效果，具有上述转子的轴向磁通电机同样具有上述效果，故本文不再赘述。The invention also discloses an axial magnetic flux motor, which comprises two stators and a rotor. The rotor is arranged between the two stators. The rotor is the rotor described in any one of the above. The above-mentioned rotor has the above-mentioned effect, and the axial flux motor having the above-mentioned rotor also has the above-mentioned effect, so it is not repeated here.
申请人发现由于永磁体磁极1a与导磁体磁极2a-3成间隔分布，并且永磁 体磁极1a的磁导小，导磁体磁极2a-3的磁导大，因此轴向磁通电机的气隙磁场变差，磁场谐波含量增加，从而造成脉动转矩幅度较大。The applicant found that since the permanent magnet poles 1a and the magnetizer poles 2a-3 are spaced apart, and the magnetic permeability of the permanent magnet pole 1a is small and the magnetic permeability of the magnetizer poles 2a-3 is large, the air-gap magnetic field of the axial flux motor worse, the harmonic content of the magnetic field increases, resulting in a larger amplitude of the pulsating torque.
为此，申请人设置了闭环***，该闭环***能够根据轴向磁通电机的转速和转矩来向电枢绕组输入目标谐波电流，该目标谐波电流会产生目标谐波磁场，该目标谐波磁场会形成脉动转矩分量，该脉动转矩分量会削弱或者消除轴向磁通电机的脉动转矩。To this end, the applicant has set up a closed-loop system capable of inputting a target harmonic current to the armature winding according to the rotational speed and torque of the axial flux motor, the target harmonic current will generate a target harmonic magnetic field, the target harmonic current Harmonic magnetic fields create a pulsating torque component that attenuates or cancels the pulsating torque of an axial flux motor.
实施例二 Embodiment 2
请参考图6至图10，本发明公开的转子包括转子支架3b和磁极1b，特别地，还包括假磁极2b。磁极1b为永磁材料，假磁极2b为导磁材料，转子支架3b为非导磁材料。磁极1b和假磁极2b围绕转子支架3b的中心间隔排布。磁极1b与假磁极2b均能够安装在转子支架3b上。磁极1b的个数或者说假磁极2b的个数即为电机的极对数。Please refer to FIG. 6 to FIG. 10 , the rotor disclosed in the present invention includes a rotor support 3b and a magnetic pole 1b, in particular, also includes a dummy magnetic pole 2b. The magnetic pole 1b is made of permanent magnet material, the dummy magnetic pole 2b is made of magnetically conductive material, and the rotor bracket 3b is made of non-magnetically conductive material. The magnetic poles 1b and the dummy magnetic poles 2b are arranged at intervals around the center of the rotor holder 3b. Both the magnetic pole 1b and the dummy magnetic pole 2b can be mounted on the rotor support 3b. The number of magnetic poles 1b or the number of dummy magnetic poles 2b is the number of pole pairs of the motor.
由于假磁极2b为导磁材料，因此在相邻的磁极1b与假磁极2b之间会形成磁回路。在传统的转子中，所有的磁极1b均为永磁材料，在相邻的两个磁极1b之间会产生磁回路，而本发明将相邻的两个磁极1b中的一个更换为了假磁极2b，如此，磁极1b的用量减少了一半，那么就会显著降低轴向磁通电机的成本。Since the dummy magnetic poles 2b are magnetically conductive materials, a magnetic circuit is formed between the adjacent magnetic poles 1b and the dummy magnetic poles 2b. In the conventional rotor, all the magnetic poles 1b are made of permanent magnet material, and a magnetic circuit is generated between the two adjacent magnetic poles 1b, while the present invention replaces one of the adjacent two magnetic poles 1b with a dummy magnetic pole 2b , in this way, the amount of magnetic pole 1b is reduced by half, which will significantly reduce the cost of the axial flux motor.
需要说明的是，磁通密度的大小与磁动势和磁导的乘积成正比，而磁动势与磁极1b的磁化方向长度近似呈正比。本发明将磁回路中的一块磁极1b用假磁极2b代替，那么磁动势减小了一半，但假磁极2b的材质为导磁材料，假磁极2b的磁导率远大于磁极1b，因此相邻的磁极1b与假磁极2b之间形成的磁回路中的磁导较原来大幅度提升。It should be noted that the magnitude of the magnetic flux density is proportional to the product of the magnetomotive force and the magnetic permeability, and the magnetomotive force is approximately proportional to the length of the magnetization direction of the magnetic pole 1b. In the present invention, a magnetic pole 1b in the magnetic circuit is replaced by a dummy magnetic pole 2b, so the magnetomotive force is reduced by half, but the material of the dummy magnetic pole 2b is a magnetically conductive material, and the magnetic permeability of the dummy magnetic pole 2b is much larger than that of the magnetic pole 1b, so the The magnetic permeability in the magnetic circuit formed between the adjacent magnetic pole 1b and the dummy magnetic pole 2b is greatly improved compared with the original.
另外，磁导与磁回路中的气隙长度有关，气隙长度越小，那么磁导越大。因此将磁回路中的气隙设置为预设气隙，以使相邻的磁极1b与假磁极2b之间形成的磁回路的磁通密度与现有技术中相邻两个磁极1b之间形成的磁回路的磁通密度相等。In addition, the magnetic permeability is related to the length of the air gap in the magnetic circuit. The smaller the air gap length, the larger the magnetic permeability. Therefore, the air gap in the magnetic circuit is set as a preset air gap, so that the magnetic flux density of the magnetic circuit formed between the adjacent magnetic poles 1b and the dummy magnetic poles 2b is the same as that formed between the adjacent two magnetic poles 1b in the prior art. The magnetic flux density of the magnetic circuit is equal.
为了使磁回路与现有技术中的磁回路更加接近，本发明限定磁极1b与假磁极2b的形状结构和尺寸完全相同。In order to make the magnetic circuit closer to the magnetic circuit in the prior art, the present invention defines that the magnetic pole 1b and the dummy magnetic pole 2b have the same shape, structure and size.
为了减小涡流损失，本发明限定磁极1b由多个磁极1b块组装而成。多个磁极1b块沿着转子支架3b的径向排布、组装，之后利用专用胶粘接为一个完整的磁极1b。同样道理，假磁极2b由多个假磁极2b块组装而成。多个假磁极2b块沿着转子支架3b的径向排布、组装，之后利用专用胶粘接为一个完整的假磁极2b。采用组装的方式能够减小涡流损失。In order to reduce the eddy current loss, the present invention defines that the magnetic pole 1b is assembled from a plurality of magnetic pole 1b blocks. The plurality of magnetic pole 1b blocks are arranged and assembled along the radial direction of the rotor support 3b, and are then bonded into a complete magnetic pole 1b by using special glue. In the same way, the dummy pole 2b is assembled from a plurality of dummy poles 2b. A plurality of dummy poles 2b are arranged and assembled along the radial direction of the rotor support 3b, and then bonded to form a complete dummy pole 2b by using special glue. The eddy current loss can be reduced by the way of assembly.
需要说明的是，对于传统的转子，相邻的两个磁极1b的充磁方向相反，而本发明中所有的磁极1b的充磁方向相同，且均沿着磁极1b的厚度方向，或者说沿着轴向磁通电机的轴向，如此，降低了制作难度，提高了制作效率。It should be noted that, for the conventional rotor, the magnetization directions of the two adjacent magnetic poles 1b are opposite, while the magnetization directions of all the magnetic poles 1b in the present invention are the same, and they are all along the thickness direction of the magnetic pole 1b, or in other words along the direction of the thickness of the magnetic pole 1b. In this way, the manufacturing difficulty is reduced and the manufacturing efficiency is improved.
接下来介绍磁极1b与假磁极2b的安装方式：本发明在转子支架3b上设置了磁极安装槽3b-1和假磁极安装槽3b-2。磁极1b安装在磁极安装槽3b-1内，假磁极2b安装在假磁极安装槽3b-2内。为了方便安装，本发明限定磁极安装槽3b-1在转子支架3b的边缘部形成有磁极通口，磁极1b能够通过该磁极通口进出磁极安装槽3b-1。假磁极安装槽3b-2在转子支架3b的边缘部形成有假磁极通口，假磁极2b能够通过该假磁极通口进出假磁极安装槽3b-2。Next, the installation method of the magnetic pole 1b and the dummy magnetic pole 2b is introduced: the present invention is provided with a magnetic pole installation groove 3b-1 and a dummy magnetic pole installation groove 3b-2 on the rotor support 3b. The magnetic pole 1b is installed in the magnetic pole installation groove 3b-1, and the dummy magnetic pole 2b is installed in the dummy magnetic pole installation groove 3b-2. In order to facilitate installation, the present invention defines that the magnetic pole installation slot 3b-1 is formed with a magnetic pole through opening at the edge of the rotor bracket 3b, and the magnetic pole 1b can enter and exit the magnetic pole installation slot 3b-1 through the magnetic pole through opening. The dummy magnetic pole mounting slot 3b-2 has a dummy magnetic pole through opening formed at the edge of the rotor holder 3b, and the dummy magnetic pole 2b can enter and exit the dummy magnetic pole mounting slot 3b-2 through the dummy magnetic pole through opening.
本发明还在磁极安装槽3b-1的侧壁上设置了磁极凸条部，磁极凸条部沿着转子支架3b的径向延伸。磁极1b上设置有与磁极凸条部卡配的磁极凹槽1b-1。该磁极凹槽1b-1沿着转子支架3b的径向延伸，并且磁极凹槽1b-1的两个端部均为开放结构。在安装磁极1b时，使磁极凸条部对准磁极凹槽1b-1，之后将磁极1b向转子支架3b的中心推入即可。In the present invention, a magnetic pole protruding strip portion is also provided on the side wall of the magnetic pole installation groove 3b-1, and the magnetic pole protruding strip portion extends along the radial direction of the rotor bracket 3b. The magnetic pole 1b is provided with a magnetic pole groove 1b-1 which is engaged with the magnetic pole protruding strip portion. The magnetic pole groove 1b-1 extends along the radial direction of the rotor support 3b, and both ends of the magnetic pole groove 1b-1 are open structures. When installing the magnetic pole 1b, the magnetic pole protruding strip portion may be aligned with the magnetic pole groove 1b-1, and then the magnetic pole 1b may be pushed into the center of the rotor holder 3b.
同样道理，本发明还在假磁极安装槽3b-2的侧壁上设置了假磁极凸条部，假磁极凸条部沿着转子支架3b的径向延伸。假磁极2b上设置有与假磁极凸条部卡配的假磁极凹槽2b-1。该假磁极凹槽2b-1沿着转子支架3b的径向延伸，并且假磁极凹槽2b-1的两个端部均为开放结构。在安装假磁极2b时，使假磁极凸条部对准假磁极凹槽2b-1，之后将假磁极2b向转子支架3b的中心推入即可。Similarly, in the present invention, a dummy magnetic pole protruding strip portion is also provided on the side wall of the dummy magnetic pole mounting groove 3b-2, and the dummy magnetic pole protruding strip portion extends along the radial direction of the rotor bracket 3b. The dummy magnetic pole 2b is provided with a dummy magnetic pole groove 2b-1 which is engaged with the dummy magnetic pole protruding strip portion. The dummy pole groove 2b-1 extends along the radial direction of the rotor support 3b, and both ends of the dummy pole groove 2b-1 are open structures. When installing the dummy magnetic pole 2b, the dummy magnetic pole protruding strip portion is aligned with the dummy magnetic pole groove 2b-1, and then the dummy magnetic pole 2b can be pushed into the center of the rotor holder 3b.
另外，本发明还增设了防护环4b，防护环4b套设在转子支架3b的外圆上，以将磁极1b和假磁极2b锁紧在磁极安装槽3b-1和假磁极安装槽3b-2内。为了防止漏磁，本发明将防护环4b的材质设置为非导磁材质。In addition, the present invention also adds a guard ring 4b, which is sleeved on the outer circle of the rotor support 3b to lock the magnetic pole 1b and the dummy magnetic pole 2b in the magnetic pole installation groove 3b-1 and the false magnetic pole installation groove 3b-2 Inside. In order to prevent magnetic leakage, the present invention sets the material of the guard ring 4b as a non-magnetic conductive material.
申请人发现由于磁极1b与假磁极2b成间隔分布，并且磁极1b的磁导小， 假磁极2b的磁导大，因此轴向磁通电机的气隙磁场变差，磁场谐波含量增加，从而造成脉动转矩幅度较大。为了削弱或者消除轴向磁通电机的脉动转矩，本发明增设了闭环***，该闭环***能够根据轴向磁通电机反馈的转速和转矩，通过控制器来向电枢绕组输入目标谐波电流。该目标谐波电流会产生目标谐波磁场，该目标谐波磁场会形成脉动转矩分量，该脉动转矩分量会削弱或者消除轴向磁通电机的脉动转矩。The applicant found that since the magnetic pole 1b is spaced apart from the dummy pole 2b, and the magnetic permeability of the magnetic pole 1b is small, and the magnetic permeability of the dummy pole 2b is large, the air-gap magnetic field of the axial flux motor deteriorates, and the magnetic field harmonic content increases, thereby The pulsating torque is larger. In order to weaken or eliminate the pulsating torque of the axial flux motor, a closed-loop system is added in the present invention, and the closed-loop system can input target harmonics to the armature winding through the controller according to the speed and torque fed back by the axial flux motor. current. The target harmonic current will generate a target harmonic magnetic field, and the target harmonic magnetic field will form a pulsating torque component, and the pulsating torque component will weaken or eliminate the pulsating torque of the axial flux motor.
本发明还公开了一种轴向磁通电机，该电机包括转子，该转子为上述任意一种转子。上述转子具有上述效果，具有上述转子的轴向磁通电机同样具有上述效果，故本文不再赘述。The invention also discloses an axial magnetic flux motor, which comprises a rotor, and the rotor is any one of the above-mentioned rotors. The above-mentioned rotor has the above-mentioned effect, and the axial flux motor having the above-mentioned rotor also has the above-mentioned effect, so it is not repeated here.
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (19)

  1. 一种转子，包括转子支架和永磁体磁极，其特征在于，还包括导磁体磁极，所述永磁体磁极与所述导磁体磁极围绕所述转子支架的中心间隔排布；A rotor includes a rotor support and permanent magnet poles, and is characterized in that it further includes a magnetic conductor pole, and the permanent magnet poles and the magnet conductor poles are arranged at intervals around the center of the rotor support;
    所述转子支架的材质为导磁体，所述导磁体磁极形成于所述转子支架，相邻两个所述导磁体磁极之间形成安装槽，该安装槽在所述转子支架的边缘部位为开放结构，所述永磁体磁极安装于所述安装槽内。The material of the rotor bracket is a magnetic conductor, the magnetic poles of the magnetic conductor are formed on the rotor bracket, and an installation slot is formed between the two adjacent magnetic poles of the magnetic conductor, and the installation slot is open at the edge of the rotor bracket structure, the permanent magnet poles are installed in the installation slot.
  2. 如权利要求1所述的转子，其特征在于，所述安装槽的侧壁上设置有卡凸，所述卡凸沿着所述转子支架的径向延伸，所述永磁体磁极的侧壁上设置有与所述卡凸适配的卡槽。The rotor according to claim 1, wherein a side wall of the installation slot is provided with a snap protrusion, the snap protrusion extends along the radial direction of the rotor support, and the side wall of the permanent magnet pole is provided with a snap protrusion. A card slot adapted to the card protrusion is provided.
  3. 如权利要求1所述的转子，其特征在于，还包括防护环，所述防护环套设在所述转子与所述永磁体磁极的周缘上。The rotor according to claim 1, further comprising a guard ring, the guard ring is sleeved on the periphery of the rotor and the magnetic poles of the permanent magnet.
  4. 如权利要求3所述的转子，其特征在于，所述防护环的材质为非导磁材质。The rotor according to claim 3, wherein the material of the guard ring is a non-magnetic conductive material.
  5. 如权利要求1所述的转子，其特征在于，所述永磁体磁极包括多个永磁体磁极块，多个所述永磁体磁极块沿着所述转子支架的径向组装成所述永磁体磁极。The rotor of claim 1, wherein the permanent magnet poles comprise a plurality of permanent magnet pole pieces, and a plurality of the permanent magnet pole pieces are assembled to form the permanent magnet poles along a radial direction of the rotor support .
  6. 如权利要求5所述的转子，其特征在于，多个所述永磁体磁极块之间通过胶粘接为所述永磁体磁极。The rotor according to claim 5, wherein a plurality of the permanent magnet pole pieces are bonded to form the permanent magnet poles through glue.
  7. 如权利要求1所述的转子，其特征在于，所有的所述永磁体磁极的充磁方向相同，且均沿着所述永磁体磁极的厚度方向。The rotor according to claim 1, wherein the magnetization directions of all the permanent magnet poles are the same and are all along the thickness direction of the permanent magnet poles.
  8. 一种轴向磁通电机，包括两个定子和一个转子，所述转子位于两个所述定子之间，其特征在于，所述转子为如权利要求1-7任意一项所述的转子。An axial flux motor, comprising two stators and a rotor, wherein the rotor is located between the two stators, wherein the rotor is the rotor according to any one of claims 1-7.
  9. 如权利要求8所述的轴向磁通电机，其特征在于，还包括闭环***，所述闭环***用于向电枢绕组注入目标谐波电流，所述目标谐波电流用于削弱或消除所述轴向磁通电机的脉动转矩。The axial flux motor of claim 8, further comprising a closed-loop system for injecting a target harmonic current into the armature winding, the target harmonic current for weakening or eliminating all The pulsating torque of the axial flux motor.
  10. 一种转子，包括转子支架和磁极，其特征在于，还包括假磁极，所述磁极为永磁材料，所述假磁极为导磁材料；A rotor, comprising a rotor support and a magnetic pole, is characterized in that it further comprises a dummy magnetic pole, the magnetic pole is a permanent magnet material, and the dummy magnetic pole is a magnetically conductive material;
    所述磁极与所述假磁极围绕所述转子支架的中心间隔排布，且所述磁极与所述假磁极均能够安装于所述转子支架上。The magnetic poles and the dummy magnetic poles are arranged at intervals around the center of the rotor bracket, and both the magnetic poles and the dummy magnetic poles can be mounted on the rotor bracket.
  11. 根据权利要求10所述的转子，其特征在于，所述磁极与所述假磁极的形状结构和尺寸相同。The rotor according to claim 10, wherein the magnetic pole and the dummy magnetic pole have the same shape, structure and size.
  12. 根据权利要求10所述的转子，其特征在于，相邻的所述磁极与所述假磁极之间形成的磁回路的气隙为预设气隙。The rotor according to claim 10, wherein the air gap of the magnetic circuit formed between the adjacent magnetic poles and the dummy magnetic poles is a preset air gap.
  13. 根据权利要求10所述的转子，其特征在于，所述磁极包括多个磁极块，多个所述磁极块沿所述转子支架的径向排布组装成所述磁极；The rotor according to claim 10, wherein the magnetic pole comprises a plurality of magnetic pole pieces, and a plurality of the magnetic pole pieces are arranged and assembled along the radial direction of the rotor support to form the magnetic pole;
    所述假磁极包括多个假磁极块，多个所述假磁极块沿着所述转子支架的径向排布组装成所述假磁极。The dummy magnetic pole includes a plurality of dummy magnetic pole pieces, and the plurality of the dummy magnetic pole pieces are arranged and assembled along the radial direction of the rotor support to form the dummy magnetic pole.
  14. 根据权利要求10所述的转子，其特征在于，所述转子支架上设置有磁极安装槽和假磁极安装槽，所述磁极安装于所述磁极安装槽内，所述假磁极安装于所述假磁极安装槽内。The rotor according to claim 10, wherein a magnetic pole installation slot and a dummy magnetic pole installation slot are provided on the rotor support, the magnetic pole is installed in the magnetic pole installation slot, and the dummy magnetic pole is installed in the dummy magnetic pole in the pole mounting slot.
  15. 根据权利要求14所述的转子，其特征在于，所述磁极安装槽在所述转子支架的边缘部形成有磁极通口，所述磁极通过该磁极通口进出所述磁极安装槽；The rotor according to claim 14, wherein the magnetic pole installation slot is formed with a magnetic pole through opening at the edge of the rotor support, and the magnetic pole enters and exits the magnetic pole installation slot through the magnetic pole through opening;
    所述假磁极安装槽在所述转子支架的边缘部形成有假磁极通口，所述假磁极通过该假磁极通口进出所述假磁极安装槽。The dummy magnetic pole installation slot is formed with a dummy magnetic pole through opening at the edge of the rotor support, and the dummy magnetic pole enters and exits the dummy magnetic pole installation slot through the dummy magnetic pole through opening.
  16. 根据权利要求14所述的转子，其特征在于，所述磁极安装槽的侧壁上设置有磁极凸条部，所述磁极上设置有与所述磁极凸条部卡配的磁极凹槽；The rotor according to claim 14, wherein a magnetic pole ridge portion is provided on the side wall of the magnetic pole installation slot, and a magnetic pole groove is arranged on the magnetic pole to engage with the magnetic pole ridge portion;
    所述假磁极安装槽的侧壁上设置有假磁极凸条部，所述假磁极上设置有与所述假磁极凸条部卡配的假磁极凹槽。A dummy magnetic pole protruding strip portion is provided on the side wall of the dummy magnetic pole installation slot, and a dummy magnetic pole groove is arranged on the dummy magnetic pole which is engaged with the dummy magnetic pole protruding strip portion.
  17. 根据权利要求14所述的转子，其特征在于，所述转子还包括防护环，所述防护环套设在所述转子支架的外圈外，将所述磁极和所述假磁极分别锁紧在所述磁极安装槽和所述假磁极安装槽内。The rotor according to claim 14, characterized in that, the rotor further comprises a guard ring, the guard ring is sleeved outside the outer ring of the rotor support, and locks the magnetic pole and the dummy magnetic pole on the outer ring of the rotor bracket respectively. the magnetic pole installation groove and the dummy magnetic pole installation groove.
  18. 根据权利要求10所述的转子，其特征在于，所述转子包含于轴向磁通电机内，所述轴向磁通电机还包括闭环***，所述闭环***用于向所述轴向磁通电机的电枢绕组注入目标谐波电流，所述目标谐波电流产生的目标脉动转矩能够削弱所述轴向磁通电机的脉动转矩。The rotor of claim 10, wherein the rotor is contained within an axial flux motor further comprising a closed loop system for supplying the axial flux A target harmonic current is injected into the armature winding of the motor, and the target pulsating torque generated by the target harmonic current can weaken the pulsating torque of the axial flux motor.
  19. 一种轴向磁通电机，包括转子，其特征在于，所述转子为如权利要求10-18任意一项所述的转子。An axial flux motor, comprising a rotor, wherein the rotor is the rotor according to any one of claims 10-18.
PCT/CN2021/124590 2020-12-24 2021-10-19 Rotor and axial flux motor WO2022134777A1 (en)

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Application Number Priority Date Filing Date Title
CN202011552241.9A CN114744799A (en) 2020-12-24 2020-12-24 Rotor and axial magnetic motor
CN202011552241.9 2020-12-24
CN202121318464.9 2021-06-11
CN202121318464.9U CN215071862U (en) 2021-06-11 2021-06-11 Rotor and axial magnetic motor

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005253146A (en) * 2004-03-02 2005-09-15 Denso Corp Motor
CN102710045A (en) * 2012-05-29 2012-10-03 东元总合科技（杭州）有限公司 False pole rotor and permanent magnet wind generator using same
CN104753250A (en) * 2015-04-21 2015-07-01 山东理工大学 Flywheel type generator of range extender for electric vehicle
CN106787310A (en) * 2016-11-17 2017-05-31 南京航空航天大学 A kind of magnetic-field-enhanced Consequent pole permanent magnet motor
CN107196434A (en) * 2017-06-21 2017-09-22 珠海格力节能环保制冷技术研究中心有限公司 Rotor assembly and magneto
CN110808673A (en) * 2019-12-09 2020-02-18 武汉理工大学 Novel double-stator Halbach alternating pole permanent magnet vernier motor
CN213817373U (en) * 2020-12-24 2021-07-27 浙江盘毂动力科技有限公司 Rotor and axial magnetic motor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005253146A (en) * 2004-03-02 2005-09-15 Denso Corp Motor
CN102710045A (en) * 2012-05-29 2012-10-03 东元总合科技（杭州）有限公司 False pole rotor and permanent magnet wind generator using same
CN104753250A (en) * 2015-04-21 2015-07-01 山东理工大学 Flywheel type generator of range extender for electric vehicle
CN106787310A (en) * 2016-11-17 2017-05-31 南京航空航天大学 A kind of magnetic-field-enhanced Consequent pole permanent magnet motor
CN107196434A (en) * 2017-06-21 2017-09-22 珠海格力节能环保制冷技术研究中心有限公司 Rotor assembly and magneto
CN110808673A (en) * 2019-12-09 2020-02-18 武汉理工大学 Novel double-stator Halbach alternating pole permanent magnet vernier motor
CN213817373U (en) * 2020-12-24 2021-07-27 浙江盘毂动力科技有限公司 Rotor and axial magnetic motor

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