CN117792000A - Axial magnetic field hybrid excitation synchronous motor based on L-shaped magnetizer - Google Patents
Axial magnetic field hybrid excitation synchronous motor based on L-shaped magnetizer Download PDFInfo
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- CN117792000A CN117792000A CN202311632136.XA CN202311632136A CN117792000A CN 117792000 A CN117792000 A CN 117792000A CN 202311632136 A CN202311632136 A CN 202311632136A CN 117792000 A CN117792000 A CN 117792000A
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- 230000005284 excitation Effects 0.000 title claims abstract description 84
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 23
- 238000004804 winding Methods 0.000 claims abstract description 38
- 239000004020 conductor Substances 0.000 claims description 12
- 230000004907 flux Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- ABEXMJLMICYACI-UHFFFAOYSA-N [V].[Co].[Fe] Chemical compound [V].[Co].[Fe] ABEXMJLMICYACI-UHFFFAOYSA-N 0.000 claims description 2
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract description 6
- 230000005347 demagnetization Effects 0.000 abstract description 5
- 230000002427 irreversible effect Effects 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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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Abstract
The embodiment of the invention discloses an axial magnetic field hybrid excitation synchronous motor based on an L-shaped magnetizer, and relates to the technical field of hybrid excitation motors. The invention comprises the following steps: the stator comprises a static annular magnetic conduction bridge, a direct current excitation winding, a stator core, an armature winding, a rotary L-shaped magnetizer and a Halbach permanent magnet. The two rotating parts are arranged on the non-magnetic rotor disk and rotate along with the rotating shaft. The mixed excitation motor adopts the annular magnetic conduction bridge structure, so that an excitation winding can be arranged on a stator, and the combined L-shaped magnetic conduction bridge structure enables an electric excitation magnetic circuit to be axially closed, thereby meeting the brushless requirement; the permanent magnet magnetic circuit and the electric excitation magnetic circuit are axially connected in parallel, so that the irreversible demagnetization risk of the permanent magnet is reduced, and the power density and the operation reliability are further improved.
Description
Technical Field
The invention relates to the technical field of design of hybrid excitation motor bodies, in particular to an axial magnetic field hybrid excitation synchronous motor based on an L-shaped magnetizer.
Background
The traditional permanent magnet motor adopts the permanent magnet as an excitation source, and the high magnetic energy product characteristic of the permanent magnet enables the permanent magnet motor to have the advantages of high power density and high efficiency. However, the single excitation source causes the inherent problems of difficult magnetic field adjustment and fault de-excitation of the permanent magnet motor, and limits the range expansion, power generation voltage regulation and fault protection capability of the electric operation high-efficiency area of the permanent magnet motor. The electric excitation source is introduced to enable the air gap magnetic field to be generated by the simultaneous action of the two excitation sources, the air gap magnetic field can be regulated by regulating the excitation current, and the proportion of the electric excitation magnetic potential and the permanent magnetic potential to the total magnetic potential directly reflects the magnetic regulating capability of the motor. The hybrid excitation motor can be divided into a rotor permanent magnet hybrid excitation motor and a stator permanent magnet hybrid excitation motor according to the placement position of the permanent magnet, wherein the rotor permanent magnet hybrid excitation motor has relatively higher power density and efficiency, and is widely focused and applied. For a hybrid excitation motor, if an electric excitation winding is directly wound on a rotor of a rotor permanent magnet motor, a series hybrid excitation magnetic circuit in which an electric excitation magnetic circuit passes through a permanent magnet is formed, the total magnetic resistance of the magnetic circuit is increased, and the permanent magnet has a larger irreversible demagnetization risk. Meanwhile, an electric excitation winding on a rotor needs an electric brush and a slip ring to realize construction of an electric excitation magnetic field, and the problems of mechanical abrasion, commutation spark and the like caused by a mechanical commutator can limit the running rotating speed range and reliability of the motor.
Therefore, brushless hybrid excitation motor topology is a key to achieving high reliability operation of the motor. The exciting winding is positioned on the stator, so that excitation brushless can be realized more easily, and the organic combination of the electric exciting magnetic circuit and the permanent magnetic circuit can be realized by means of a special magnetic conduction structure. The need for brushless results in challenges for construction of an electrically excited magnetic circuit and improvement of excitation efficiency.
In general, the brushless requirement is met, the permanent magnet magnetic circuit and the electric excitation magnetic circuit can be kept in parallel connection, and meanwhile, the electric excitation magnetic circuit does not pass through the permanent magnet, so that irreversible demagnetization risks of the permanent magnet are reduced, the running reliability is improved, and the novel direction of the structural design of the permanent magnet motor is achieved.
Disclosure of Invention
The embodiment of the invention provides an axial magnetic field mixed excitation synchronous motor based on an L-shaped magnetizer, which can meet the brushless requirement, realize the axial parallel connection of a permanent magnetic circuit and an electric excitation magnetic circuit, and simultaneously enable the electric excitation magnetic circuit not to pass through a permanent magnet so as to reduce the irreversible demagnetization risk of the permanent magnet, thereby further improving the operation reliability.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
the motor comprises a main shaft (1), a stator core (2), an armature winding (3), a rotor disc (4), a Halbach permanent magnet array (5), an L-shaped magnetizer (7), an annular magnetically permeable bridge (6) and an excitation winding (8);
the armature winding (3) is a static component and is wound on the axial teeth of the stator core (2);
the Halbach permanent magnet array (5) and the L-shaped magnetic conduction bridge (7) are fixed on a rotor disc (4), the rotor disc (4) is fixed on a main shaft (1) and forms a rotating part through bearing supports on two sides of the rotor disc (4) on the main shaft (1);
the excitation winding (8) is embedded and wound in the annular magnetic conduction bridge (6), and the annular magnetic conduction bridge (6) is fixed on the end cover and is a static part, so that brushless excitation is realized;
the magnetic circuit formed after the motor is electrified comprises a permanent magnet magnetic circuit and an electric excitation magnetic circuit, wherein the sequence of the permanent magnet magnetic flux paths is as follows: a Halbach permanent magnet array (5), a rotor disc (4), a working air gap 2, a stator core (2), a working air gap 2, a rotor disc (4) and a Halbach permanent magnet array (5);
the electric excitation magnetic flux path sequence is as follows: annular magnetic conduction bridge (6), working air gap 1, N pole L-shaped magnetic conduction body, rotor disc (4), working air gap 2, stator core (2), working air gap 2, rotor disc (4), S pole L-shaped magnetic conduction body, working air gap 1 and annular magnetic conduction bridge (6).
The stator core (2) comprises a stator back yoke and axial stator teeth (10), the stator slots are straight slots, the armature winding (3) is wound on the axial stator teeth (10), and the winding is fixed by adopting slot wedges or pole shoes and other structures.
The rotor disc (4) is a thin disc made of non-magnetic conductive material and has higher structural strength, and particularly, the non-magnetic conductive rotor disc can be made of 3Cr13 stainless steel material; the L-shaped magnetizer (7) and the Halbach permanent magnet array (5) are fixedly arranged on the rotor disc (4) so that the rotor disc (4) rotates along with the main shaft (1) when the main shaft (1) rotates, and the L-shaped magnetizer (7) and the Halbach permanent magnet array (5) rotate along with the rotor disc (4). By fixing the L-shaped magnetizer and the Halbach permanent magnet array on the rotor disk, the three components simultaneously rotate along with the main shaft.
The L-shaped magnetizer (7) is divided into two sections along the axial direction and the radial direction, wherein the section shape of the axial section is a fan ring; dividing the structure of the L-shaped magnetizer (7) into a first type magnetizer structure and a second type magnetizer structure according to the inner and outer radius sizes and the installation direction of the fan ring of the section of the axial section; the first type magnetizer structures and the second type magnetizer structures are staggered along the circumferential direction of the annular magnetizer bridge (6), and gaps between every two adjacent magnetizers are uniformly distributed. Specifically, a plurality of gaps exist in the motor structure, and the motor structure can be divided into an effective air gap and a common gap according to whether main magnetic flux passes through or not, wherein the effective air gap is passed through by the main magnetic flux, and the common gap is passed through by the non-main magnetic flux. The first type of magnetizer structure comprises: the inner radius and the outer radius of the section of the axial section are respectively the same as the inner radius and the outer radius of the inner ring of the annular magnetic conduction bridge (6); the second type of magnetizer structure comprises: the inner radius and the outer radius of the section of the axial section are respectively the same as the inner radius and the outer radius of the outer ring of the annular magnetic conduction bridge (6).
The annular magnetic conduction bridge (6) is made of magnetic conduction materials, and particularly, the magnetic conduction materials can be materials such as No. ten steel, 1J22 iron-cobalt-vanadium soft magnetic alloy and the like. The structure of the annular magnetic conduction bridge (6) comprises a bottom plate and two annular side walls, wherein the sizes of the two annular side walls are in constraint relation with the L-shaped magnetic conductor, and in order to increase the sectional area of an electric excitation magnetic circuit, the inner diameter and the outer diameter of the two annular side walls are correspondingly the same as the inner diameter and the outer diameter of the section of the axial section of the L-shaped magnetic conductor; the exciting winding (8) is embedded and fixed in an annular groove formed by surrounding the bottom plate and the two annular side walls, and the exciting winding (8) adopts direct current excitation.
In the Halbach permanent magnet array (5), each pair of poles consists of a plurality of permanent magnets with different magnetizing directions; the pole pair number of the Halbach permanent magnet array (5) determines the pole pair number of the motor.
The axial magnetic field hybrid excitation synchronous motor based on the L-shaped magnetizer provided by the embodiment of the invention is provided with a static annular magnetizer bridge, a direct current excitation winding, a stator core, an armature winding, a rotating L-shaped magnetizer and a Halbach permanent magnet. The two rotating parts are arranged on the non-magnetic rotor disk and rotate along with the rotating shaft. The mixed excitation motor adopts the annular magnetic conduction bridge structure, so that an excitation winding can be arranged on a stator, and the combined L-shaped magnetic conduction bridge structure enables an electric excitation magnetic circuit to be axially closed, thereby meeting the brushless requirement; the permanent magnet magnetic circuit and the electric excitation magnetic circuit are axially connected in parallel, so that the irreversible demagnetization risk of the permanent magnet is reduced, the operation reliability is further improved, the power density of the design is higher, and certain design advantages are achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a topological explosion diagram of an axial magnetic field hybrid excitation synchronous motor based on an L-shaped magnetizer;
fig. 2 is an overall structure topology of the axial magnetic field hybrid excitation synchronous motor based on the L-shaped magnetizer;
FIG. 3 is a schematic diagram of a magnetic circuit of an axial magnetic field hybrid excitation synchronous motor based on an L-shaped magnetizer;
fig. 4 is a schematic view of a stator core according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of magnetizing directions of a pair of pole-down permanent magnets of a Halbach permanent magnet array in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of the back surface structure of an L-shaped magnetizer according to an embodiment of the present invention;
FIG. 7 is a schematic view of an air gap throughout an electric machine according to an embodiment of the present invention;
reference numerals in the drawings illustrate: 1-a main shaft; 2-stator; 3-armature winding; 4-rotor disc; 5-Halbach permanent magnet arrays; 6-annular magnetically permeable bridges; 7-L-shaped magnetizers; 8-exciting winding; 9-a stator back yoke; 10-axial stator teeth; 11-stator slots.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present invention to those skilled in the art. Embodiments of the present invention will hereinafter be described in detail, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not to be construed as limiting the present invention. As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The electric excitation source of the axial magnetic field mixed excitation synchronous motor based on the L-shaped magnetizer is positioned on the static component, the brushless requirement can be met, the permanent magnet magnetic circuit and the electric excitation magnetic circuit belong to a parallel connection relationship, the electric excitation magnetic circuit does not pass through the permanent magnet, and the electric excitation synchronous motor has stronger magnetic field adjusting capability.
As shown in fig. 1, the embodiment provides an axial magnetic field hybrid excitation synchronous motor based on an L-shaped magnetizer, which comprises a main shaft 1, a stator core 2, an armature winding 3, a rotor disk 4, a Halbach permanent magnet array 5, an L-shaped magnetizer 7, an annular magnetically permeable bridge 6 and an excitation winding 8. Referring to fig. 2, the armature winding 3 is wound on the axial teeth of the stator core 2; the Halbach permanent magnet array 5 surrounds the outer side of the L-shaped magnetic conduction bridge 7, the Halbach permanent magnet array and the L-shaped magnetic conduction bridge are fixed on a rotor disc together, the rotor disc 4 is fixed on the main shaft 1, and a rotating part is formed by supporting bearings on two sides; the exciting winding 8 is embedded and wound in the annular magnetic conduction bridge 6, and the annular magnetic conduction bridge 6 is fixed on the end cover, so that brushless excitation is realized; wherein the rotor disk 4, the Halbach permanent magnet array 5 and the L-shaped magnetizer 7 are rotating parts, and the stator core 2, the armature winding 3, the annular magnetically permeable bridge 6 and the exciting winding 8 are static parts.
As shown in fig. 3, the total magnetic circuit of the axial hybrid excitation synchronous motor based on the L-shaped magnetizer 7 comprises a permanent magnet magnetic circuit and an electric excitation magnetic circuit. The permanent magnetic flux path is: halbach permanent magnet array 5- & gt rotor disk 4- & gt air gap- & gt stator core 2- & gt air gap- & gt rotor disk 4- & gt Halbach permanent magnet array 5; the electro-magnetic flux path is: annular magnetic conduction bridge 6- & gtair gap- & gtN pole L-shaped magnetic conduction body- & gtrotor disk 4- & gtair gap- & gtstator core 2- & gtair gap- & gtrotor disk 4- & gtS pole L-shaped magnetic conduction body- & gtair gap- & gtannular magnetic conduction bridge 6.
Further, the stator core includes two parts, namely a stator back yoke and an axial stator tooth, and different motor output performances can be obtained by optimizing the stator tooth shape, and as a specific example, the formed stator slots are straight slots, and total 12 slots are formed. The armature winding is wound on the stator teeth, and the winding can be fixed by adopting a slot wedge or pole shoe and other structures.
Further, the annular magnetically permeable bridge 6 includes a bottom plate and two annular side walls, and the thickness of the side walls is designed to be related to the magnetic potential of the exciting winding. The exciting winding is embedded in an annular groove formed by the bottom plate and the side wall, direct current excitation is adopted, and the magnetic regulating capability of the motor is affected by the variation range of the direct current excitation magnetic potential. The annular magnetic conduction bridge is fixed with the end cover, so that heat dissipation of the exciting winding is facilitated.
As shown in fig. 4, the stator core includes a stator back yoke and axial stator teeth, and the stator slots formed are straight slots.
In the motor topology, N poles and S poles are combined together to form a pair of poles, and the Halbach array can select the number of permanent magnets and the magnetizing direction according to the specific magnetism gathering effect. As shown in fig. 5, each pair of poles of the Halbach permanent magnet array 5 is composed of a plurality of permanent magnets with different magnetizing directions, and the pole pair number of the Halbach permanent magnet array is equal to the pole pair number of the motor. As a specific example, the axial hybrid excitation motor adopts 10 pairs of poles, the corresponding central angle of each pair of poles is 36 degrees, fig. 4 shows the magnetizing directions of 5 permanent magnets under each pair of poles, the magnetizing direction of the first permanent magnet is 0 degrees, the magnetizing direction of the second permanent magnet is changed by 90 degrees around the anticlockwise direction, and so on.
As shown in fig. 6, the L-shaped magnetic conductor 7 may be divided into two sections along the axial direction and the radial direction, the section shape of the axial section is a fan ring, the L-shaped magnetic conductor may be divided into two types according to the inner and outer radius sizes of the fan ring and the installation direction, the inner and outer radii R1 and R2 of the axial section of the first type magnetic conductor respectively correspond to the radius sizes of the inner ring of the annular magnetic bridge, and the inner and outer radii R3 and R4 of the axial section of the second type magnetic conductor respectively correspond to the radius sizes of the outer ring of the annular magnetic bridge. The two types of L-shaped magnetizers are staggered along the circumferential direction of the annular magnetically permeable bridge. As a specific example, the gap between every two magnetizers is uniformly distributed.
As shown in fig. 7, there are multiple air gaps in the motor structure, and the size constraint relationship of the gaps influences the trend of the electric excitation magnetic flux according to the "magnetic resistance minimum principle". The air gap satisfies the following dimensional relationship equation
min{σ 3 ，σ 4 }≥5max{σ 1 ，σ 2 }
In sigma 1 For the axial distance sigma from the tooth of the stator to the upper bottom surface of the L-shaped magnetizer 2 Is the axial distance between the lower bottom surface of the L-shaped magnetizer and the upper boundary of the annular magnetizer, sigma 3 Is the axial distance between the upper bottom surface of the annular magnetic conduction bridge and the lower bottom surface of the radial section of the L-shaped magnetic conductor, sigma 4 Is the circumferential distance between the two types of L-shaped magnetizers.
In practical application, the scheme of the embodiment has the main advantages that: the Halbach permanent magnet array is adopted, so that the permanent magnet field has good magnetism gathering effect, and the power density of the motor is improved; the parallel magnetic circuit is adopted, so that the demagnetizing risk of the permanent magnet is reduced, and the magnetic field adjusting capability and reliability of the motor are improved; the annular magnetic conduction bridge structure is used for enabling the exciting winding to be positioned on the stator, and the L-shaped magnetic conduction bridge structure is combined for enabling the electric excitation magnetic circuit to be axially closed, so that the brushless requirement is met, and the running reliability of the motor is further improved; the electric excitation magnetic field can be equivalent to a rotor excitation type rotating magnetic field through the L-shaped magnetic conduction bridge structure, so that the power density of the motor is improved.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points. The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. An axial magnetic field hybrid excitation synchronous motor based on L-shaped magnetizer is characterized by comprising:
the motor comprises a main shaft (1), a stator core (2), an armature winding (3), a rotor disc (4), a Halbach permanent magnet array (5), an L-shaped magnetizer (7), an annular magnetically permeable bridge (6) and an excitation winding (8);
an armature winding (3) wound around the axial teeth of the stator core (2);
the Halbach permanent magnet array (5) and the L-shaped magnetic conduction bridge (7) are fixed on a rotor disc (4), and the rotor disc (4) is fixed on a main shaft (1) and forms a rotating part through bearing support on the main shaft (1);
the excitation winding (8) is embedded and wound in the annular magnetic conduction bridge (6), and the annular magnetic conduction bridge (6) is fixed on the end cover;
the magnetic circuit formed after the motor is electrified comprises a permanent magnet magnetic circuit and an electric excitation magnetic circuit.
2. The L-shaped magnetizer-based axial magnetic field hybrid excitation synchronous motor according to claim 1, wherein the permanent magnetic flux path sequence is: a Halbach permanent magnet array (5), a rotor disc (4), a working air gap 2, a stator core (2), a working air gap 2, a rotor disc (4) and a Halbach permanent magnet array (5);
the electric excitation magnetic flux path sequence is as follows: annular magnetic conduction bridge (6), working air gap 1, N pole L-shaped magnetic conduction body, rotor disc (4), working air gap 2, stator core (2), working air gap 2, rotor disc (4), S pole L-shaped magnetic conduction body, working air gap 1 and annular magnetic conduction bridge (6).
3. The L-shaped magnetizer-based axial magnetic field hybrid excitation synchronous motor according to claim 1, wherein,
the stator core (2) comprises a stator back yoke (9) and axial stator teeth (10), the stator slots (11) are straight slots, and the armature winding (3) is wound on the axial stator teeth (10).
4. The axial magnetic field hybrid excitation synchronous motor based on the L-shaped magnetizer according to claim 1, wherein the rotor disc (4) is made of non-magnetic conductive materials;
the L-shaped magnetizer (7) and the Halbach permanent magnet array (5) are fixedly arranged on the rotor disc (4) so that the rotor disc (4) rotates along with the main shaft (1) when the main shaft (1) rotates, and the L-shaped magnetizer (7) and the Halbach permanent magnet array (5) rotate along with the rotor disc (4).
5. The L-shaped magnetizer-based axial magnetic field hybrid excitation synchronous motor according to claim 1, characterized in that in the Halbach permanent magnet array (5), each pair of poles is composed of several permanent magnets with different magnetizing directions;
the pole pair number of the Halbach permanent magnet array (5) is equal to the pole pair number of the motor.
6. The L-shaped magnetizer-based axial magnetic field hybrid excitation synchronous motor according to claim 1, wherein the L-shaped magnetizer (7) is divided into two sections along the axial direction and the radial direction, wherein the section shape of the axial section is a sector ring;
dividing the structure of the L-shaped magnetizer (7) into a first type magnetizer structure and a second type magnetizer structure according to the inner and outer radius sizes and the installation direction of the fan ring of the section of the axial section;
the first type magnetizer structures and the second type magnetizer structures are staggered along the circumferential direction of the annular magnetizer bridge (6), and gaps between every two adjacent magnetizers are uniformly distributed.
7. The L-shaped magnetizer-based axial magnetic field hybrid excitation synchronous machine according to claim 6, wherein said first type of magnetizer structure comprises: the inner radius and the outer radius of the section of the axial section are respectively the same as the inner radius and the outer radius of the inner ring of the annular magnetic conduction bridge (6);
the second type of magnetizer structure comprises: the inner radius and the outer radius of the section of the axial section are respectively the same as the inner radius and the outer radius of the outer ring of the annular magnetic conduction bridge (6).
8. The L-shaped magnetizer-based axial magnetic field hybrid excitation synchronous motor according to claim 6, wherein,
the annular magnetic conduction bridge (6) is made of magnetic conduction materials, the structure of the annular magnetic conduction bridge (6) comprises a bottom plate and two circular side walls, wherein the sizes of the two circular side walls and the L-shaped magnetic conductor are in constraint relation, and in order to increase the sectional area of an electric excitation magnetic circuit, the inner diameter and the outer diameter of the two circular side walls are correspondingly the same as those of the section of the axial section of the L-shaped magnetic conductor;
the exciting winding (8) is embedded and fixed in an annular groove formed by surrounding the bottom plate and the two annular side walls, and the exciting winding (8) adopts direct current excitation.
9. An L-shaped magnetizer-based axial magnetic field hybrid excitation synchronous motor according to any one of claims 1-8, characterized in that the rotor disc (4) is made of 3Cr13 stainless steel material and is made into a thin disc shape.
10. The L-shaped magnetizer-based axial magnetic field hybrid excitation synchronous motor according to any one of claims 1-8, wherein the magnetically conductive material is a ten-gauge steel or a 1J22 iron-cobalt-vanadium soft magnetic alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311632136.XA CN117792000A (en) | 2023-12-01 | 2023-12-01 | Axial magnetic field hybrid excitation synchronous motor based on L-shaped magnetizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311632136.XA CN117792000A (en) | 2023-12-01 | 2023-12-01 | Axial magnetic field hybrid excitation synchronous motor based on L-shaped magnetizer |
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| Publication Number | Publication Date |
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| CN117792000A true CN117792000A (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311632136.XA Pending CN117792000A (en) | 2023-12-01 | 2023-12-01 | Axial magnetic field hybrid excitation synchronous motor based on L-shaped magnetizer |
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| CN (1) | CN117792000A (en) |
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- 2023-12-01 CN CN202311632136.XA patent/CN117792000A/en active Pending
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