CN111864966A - Integrated air-cooled axial flux motor - Google Patents
Integrated air-cooled axial flux motor Download PDFInfo
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- CN111864966A CN111864966A CN202010769341.0A CN202010769341A CN111864966A CN 111864966 A CN111864966 A CN 111864966A CN 202010769341 A CN202010769341 A CN 202010769341A CN 111864966 A CN111864966 A CN 111864966A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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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
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
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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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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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
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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
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/12—Transversal flux machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
Abstract
The invention discloses an integrated air-cooled axial flux motor, belonging to the technical field of motor cooling, wherein a shell connected with a front rotor and a rear rotor is provided with obliquely arranged blades; the rotor disc of the front rotor and/or the rear rotor is/are provided with an air inlet; the stator comprises a stator support, a plurality of support columns which are radially and radially arranged are symmetrically arranged at two axial ends of the stator support, and a plurality of U-shaped grooves are formed in the plurality of support columns along the circumferential direction; the two ends of the supporting columns are connected through the circumferential bottom, and the circumferential bottom is provided with a vent and circumferentially arranged heat dissipation ribs; the stator core wound with the stator coil is embedded in the U-shaped groove; the rotor magnetic steel adopts an oblique pole type structure; the stator core is also provided with a U-shaped heat pipe, one end of the U-shaped heat pipe is inserted into the stator core along the axial direction, the other end of the U-shaped heat pipe is positioned on the circumferential outer surface of the stator core and clings to the stator coil, and the stator core and the U-shaped heat pipe are integrally formed. The invention can effectively reduce the temperature of the winding and the iron core in the axial flux motor and improve the thermal performance of the motor.
Description
Technical Field
The invention belongs to the technical field of motor cooling, and particularly relates to an integrated air-cooled axial flux motor.
Background
The axial flux permanent magnet motor has the advantages of flat and compact structure, high power (torque) density and the like, has attracted extensive attention and research of domestic and foreign scholars, is taken as a potential high-power (torque) density motor topology, and has good application prospect in the fields of aerospace, ship propulsion, electric vehicles and other occasions with limited weight and space.
In the axial flux motor, the single-stator double-rotor yoke-free Armature separation type (YASA type, Yokeless and segmented Armature) axial flux motor has great attention due to the fact that a stator yoke part is omitted, stator iron loss is low, an Armature winding coil can be wound in a modularization mode, and the like, related research results are more, and due to the fact that the axial flux motor has a large power density advantage and a good market application prospect, some research organizations directly establish related companies, product transformation and popularization are conducted on innovative research results, and a good public praise is won in the global high-end motor market. Such as oxford university and YASA, british, university of radicel, belgium and MagnaX.
However, the axial flux motor is difficult to cool due to its compact structure, especially the YASA motor, because the stator has no yoke, the winding heat flow path is reduced, thereby causing the heat dissipation of the motor winding to be difficult, therefore, the design of the efficient winding cooling mode reduces the winding temperature rise to improve the thermal performance of the motor, and has very important significance for improving the motor power and torque.
Disclosure of Invention
In view of the defects and improvement requirements of the prior art, the invention provides an integrated air-cooled axial-flux motor, which aims to effectively reduce the winding temperature in the axial-flux motor so as to improve the thermal performance of the motor.
In order to achieve the above object, the present invention provides an integrated air-cooled axial flux motor, comprising a front rotor, a stator and a rear rotor coaxially arranged in sequence, wherein an air gap is respectively formed between the stator and the two rotors, the front rotor and the rear rotor respectively comprise a rotor disc, a rotor core and magnetic steel, wherein,
the front rotor and the rear rotor are connected through a casing, and blades which are obliquely arranged are arranged on the casing; the rotor disc of the front rotor and/or the rear rotor is/are provided with an air inlet;
the stator comprises a stator support, a stator core and a stator coil;
a plurality of support columns which are radially and radially arranged are symmetrically arranged at two axial ends of the stator support, and a plurality of U-shaped grooves are formed in the plurality of support columns along the circumferential direction; the support columns at the two ends are connected through the circumferential bottom, and the circumferential bottom is provided with a vent;
the stator iron core is provided with a plurality of stator coils, the stator coils are wound on the stator iron core, and the stator iron cores wound with the stator coils are respectively embedded in one U-shaped groove.
The integrated air-cooled axial flux motor provided by the invention has the advantages that the shell connecting the front rotor and the rear rotor is provided with the obliquely arranged blades, the rotor disc is provided with the air inlet, and the stator support is provided with the ventilation opening, so that the air gap between the stator and the rotor and the cooling flow channel between the stator coils are formed; when the rotor disc type cooling fan works, under the rotating action of the shell, cooling air enters the motor through the air inlet on the rotor disc; after cooling air enters the motor, part of the cooling air flows through an air gap between the rotor disc and the stator, cools the surfaces of the magnetic steel and the stator core and flows out through a blade gap on the shell; part of cooling air flows through the stator coils through a ventilation opening arranged on the axial bottom of the stator support, and flows out through the blade gap on the shell after cooling the stator coils; in this in-process, cooling air is direct fully to contact with magnet steel, stator core and stator coil, can carry out direct efficient cooling to axial magnetic motor, effectively promotes the thermal behavior of motor.
In the invention, after the stator coil is wound on the stator core, the stator core is embedded in the corresponding stator slot, the stator coil is easy to assemble, and the stator coil is easy to fix.
Furthermore, the magnetic steel on the front rotor and/or the rear rotor adopts a slant pole type structure.
According to the integrated air-cooled axial flux motor provided by the invention, the magnetic steel on the front rotor and/or the rear rotor adopts an oblique pole type structure, so that the rotor can be used as a centrifugal fan to generate certain air volume in the rotating process, and the cooling effect on the motor is enhanced.
Further, a circumferentially arranged heat dissipation rib is further arranged on the circumferential bottom of the stator support.
According to the integrated air-cooled axial flux motor provided by the invention, the heat dissipation ribs are arranged on the circumferential bottom of the stator support, after the support columns at the two ends of the stator support conduct the heat generated by the stator coil to the bottom of the stator support, the heat dissipation ribs arranged at the bottom can further conduct the heat to cooling air, so that the cooling effect on the stator coil is enhanced; in addition, the heat dissipation ribs are arranged along the circumferential direction at the circumferential direction bottom of the stator support, and the strength of the stator support can be enhanced.
Further, the heat dissipation ribs on the circumferential bottom are arranged in multiple rows along the circumferences with different radiuses, so that the heat conduction capacity can be improved, and the cooling effect is enhanced.
Furthermore, a U-shaped heat pipe is also arranged on the stator iron core wound with the stator coil;
and one end of the U-shaped heat pipe is inserted into the stator core along the axial direction, and the other end of the U-shaped heat pipe is positioned on the circumferential outer surface of the stator core and is tightly attached to the stator coil.
According to the invention, the U-shaped heat pipe is arranged on the stator core, one end of the U-shaped heat pipe, which is inserted into the stator core along the axial direction, can absorb the heat inside the stator core and conduct the heat to one end of the U-shaped heat pipe, which is positioned on the circumferential outer surface of the stator core, for heat dissipation, and meanwhile, one end of the U-shaped heat pipe, which is positioned on the circumferential outer surface of the stator core, can also directly dissipate the heat of the stator coil which is tightly attached to the U-shaped heat pipe, so that.
Further, the U-shaped heat pipe is provided at one end of the circumferential outer surface of the stator core with a plurality of external fins arranged in the axial direction, whereby the heat radiation capability of the U-shaped heat pipe at the one end of the circumferential outer surface of the stator core can be enhanced.
Furthermore, the U-shaped heat pipe is inserted into one end of the stator core along the axial direction, and a plurality of inner heat absorbing sheets which are arranged in the radial direction are arranged, so that the heat absorbing capacity of the U-shaped heat pipe inserted into one end of the stator core along the axial direction can be enhanced.
Further, the stator core is made of a Soft Magnetic Composite (SMC), whereby it is possible to facilitate the processing of the insertion hole for inserting the U-shaped heat pipe in the stator core.
Furthermore, the stator core and the U-shaped heat pipe are integrally formed, so that the insertion hole for inserting the U-shaped heat pipe in the stator core can be conveniently machined, the thermal contact resistance between the stator core made of the soft magnetic composite material and the U-shaped heat pipe is effectively reduced, and the heat dissipation of the stator core is improved.
Furthermore, on the circumferential bottom of the stator support, each vent is arranged at the axial middle position between two axially symmetrical support columns, so that the circulation of cooling air between the stator coils can be facilitated, and the heat dissipation effect on the stator coils is enhanced.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
(1) the integrated air-cooled axial flux motor provided by the invention has the advantages that the shell connecting the front rotor and the rear rotor is provided with the obliquely arranged blades, the rotor disc is provided with the air inlet, and the stator support is provided with the ventilation opening, so that the air gap between the stator and the rotor and the cooling flow channel between the stator coils are formed; during operation, under the rotation of casing, cooling air can be through being located the air intake entering motor back on the rotor dish, direct and magnet steel, stator core and stator coil fully contact, can carry out direct efficient cooling to axial magnetic current motor, effectively promotes the thermal behavior of motor.
(2) According to the integrated air-cooled axial flux motor provided by the invention, the magnetic steel on the front rotor and/or the rear rotor adopts an oblique pole type structure, so that the cooling effect on the motor can be enhanced.
(3) According to the integrated air-cooled axial flux motor provided by the invention, the heat dissipation ribs are arranged on the circumferential bottom of the stator support, so that the cooling effect on the stator coil can be enhanced, and the strength of the stator support is enhanced. In a preferred scheme of the invention, the heat dissipation ribs on the circumferential bottom are arranged in a plurality of rows along the circumferences with different radiuses, so that the heat conduction capability can be improved, and the cooling effect is enhanced.
(4) According to the integrated air-cooled axial flux motor provided by the invention, the U-shaped heat pipe is arranged on the stator core, so that heat in the stator core can be absorbed and then conducted to the outside to be dissipated, and the stator coil is dissipated, so that the cooling effect on the stator core and the stator coil is effectively improved. In a preferred embodiment of the present invention, the U-shaped heat pipe is located at one end of the circumferential outer surface of the stator core, and a plurality of external fins arranged in the axial direction are provided, whereby the heat dissipation capability of the U-shaped heat pipe at one end of the circumferential outer surface of the stator core can be enhanced; the U-shaped heat pipe is inserted into one end of the stator core along the axial direction, and a plurality of internal heat absorbing sheets which are arranged in the radial direction are arranged, so that the heat absorbing capacity of the U-shaped heat pipe inserted into one end of the stator core along the axial direction can be enhanced.
(5) In the preferred scheme of the integrated air-cooled axial flux motor provided by the invention, the stator core is made of Soft Magnetic Composite (SMC), so that a jack for inserting the U-shaped heat pipe on the stator core can be conveniently machined; the stator core and the U-shaped heat pipe are integrally formed, so that the insertion hole for inserting the U-shaped heat pipe in the stator core can be conveniently machined, the thermal contact resistance between the stator core made of the soft magnetic composite material and the U-shaped heat pipe is effectively reduced, and the heat dissipation of the stator core is improved.
(6) According to the integrated air-cooled axial flux motor provided by the invention, the stator coil is wound on the stator core, and then the stator core is embedded into the corresponding stator slot, so that the stator coil is simple to assemble and is easy to fix.
(7) The integrated air-cooled axial flux motor realizes air cooling of the motor by self ventilation of the fan blades or the rotor oblique poles integrated on the shell, simplifies the system structure of the air-cooled motor, and reduces the volume, the weight and the cost of the system.
Drawings
Fig. 1 is a three-dimensional exploded view of an integrated air-cooled axial-flux motor according to an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view of an integrated air-cooled axial-flux electric machine provided in accordance with an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a rotor of a motor according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a housing structure according to an embodiment of the present invention;
FIG. 5 is a schematic view of a stator support structure provided in accordance with an embodiment of the present invention;
fig. 6 is a stator coil assembly diagram according to an embodiment of the present invention;
FIG. 7 is a schematic view of a U-shaped heat pipe according to an embodiment of the present invention;
FIG. 8 is a schematic view of a motor cooling air flow path provided by an embodiment of the present invention;
the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
the structure of the cooling structure comprises a front rotor, a rotor disc 11, a rotor core 12, a magnetic steel 13, a front bearing, a magnetic steel pressing plate 15, a stator support 21, a support column 211, a heat dissipation rib 212, a stator core 22, an internal heat absorption sheet insertion hole 221, a stator coil 23, a U-shaped heat pipe 24, an external heat dissipation sheet 241, an internal heat absorption sheet 242, a fixing screw 25, a stator pressing bar 26, a rear rotor 3, a rotor disc 31, a rotor core 32, a rotor core 33, a magnetic steel 34, a rear bearing 35, a magnetic steel pressing plate 35, a casing 4, blades 41, an air inlet 5, a first cooling flow passage 6, a second cooling flow passage 7, a third cooling flow passage 8 and an air outlet 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the present application, the terms "first," "second," and the like (if any) in the description and the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The axial flux motors according to the following embodiments are axial flux motors of a single-stator double-rotor yoke-less armature split (YASA) structure.
Example 1:
an integrated air-cooled axial-flux electric machine, as shown in fig. 1 and 2, comprising: the air-cooled generator comprises a front rotor 1, a stator 2 and a rear rotor 3 which are coaxially arranged in sequence, wherein air gaps are respectively formed between the stator 2 and the two rotors; as shown in fig. 3, the front rotor 1 includes a rotor disc 11, a rotor core 12 and magnetic steel 13, the rotor core 12 is mounted and attached on the rotor disc 11, and the magnetic steel 13 is mounted and attached on the rotor core 12 and fixed by a magnetic steel pressing plate 15; the structure of the rear rotor 3 is similar to that of the front rotor 1, correspondingly, the rear rotor 3 comprises a rotor disc 31, a rotor core 32 and magnetic steel 33, the rotor core 32 is mounted and attached on the rotor disc 31, and the magnetic steel 33 is mounted and attached on the rotor core 32 and fixed by a magnetic steel pressing plate; the front rotor 1, the rear rotor 3 and the stator 1 are supported by a front bearing 14 and a rear bearing 24 respectively, so that the rotation motion is convenient; wherein the content of the first and second substances,
the front rotor 1 and the rear rotor 3 are connected through a casing 4 to reduce the eccentricity and deformation of the two rotor disks; the casing 4 is provided with blades 41 which are obliquely arranged, the structure of the casing 4 is shown in fig. 4, and the inclination angle of the blades 41 can be determined according to the actual motor structure and the heat dissipation requirement so as to ensure the air volume and the efficiency; the rotor disc 31 of the rear rotor 3 is provided with an air inlet 5;
as shown in fig. 5 and 6, the stator 2 includes a stator support 21, a stator core 22, and a stator coil 23;
a plurality of support columns 211 radially and radially arranged are symmetrically arranged at two axial ends of the stator support 21, and a plurality of U-shaped grooves are formed in the plurality of support columns 211 along the circumferential direction; the two end support columns 211 are connected through the circumferential bottom, and the circumferential bottom is provided with vents, so that cooling air can circulate conveniently, as an optional implementation manner, in the embodiment, each vent is arranged at the axial middle position between two axially symmetrical support columns;
a plurality of stator cores 22 are arranged, the stator coils 23 are wound on the stator cores 22, and the stator cores 22 wound with the stator coils 23 are respectively embedded in a U-shaped groove; in the embodiment, the stator support 21 is specially designed to allow the stator core 22 to be embedded in the corresponding stator slot after the stator coil 23 is wound on the stator core 22, so that the stator coil 23 is easy to assemble and the stator coil 23 is easy to fix; alternatively, the stator coil 23 and the stator core 22 are fixed and pressed tightly by the fixing screw 25 and the stator pressing bar 26 in the embodiment;
in the integrated air-cooled axial flux motor provided by the embodiment, the casing 4 connecting the front rotor and the rear rotor is provided with the obliquely arranged blades 41, the rotor disc 31 of the rear rotor 3 is provided with the air inlet 5, and the stator support 21 is provided with the ventilation opening, so that a cooling flow channel is formed between an air gap between the stator and the rotor and between stator coils; as shown in fig. 2, the cooling flow channel formed in the air gap between the rear rotor 3 and the stator 2 is the first cooling flow channel 6, the radial cooling flow channel between the stator coils 23 is the second cooling flow channel 7, the cooling flow channel formed in the air gap between the front rotor 1 and the stator 2 is the third cooling flow channel 8, and the blade gap on the casing 4 simultaneously constitutes the air outlet 9;
in operation, under the rotation action of the casing 4, cooling air enters the motor through the air inlet 4 on the rotor disc 31; cooling air is divided into three parts after entering the motor; a part of cooling air flows through the first cooling flow channel 6, cools the magnetic steel 33 of the rear rotor 3 and the surface of the stator core 22, and then flows out through the air outlet 9; a part of the cooling air flows through the second cooling flow channel 7, cools the stator coil 23, and then flows out through the air outlet 9; a part of cooling air flows through the third cooling flow channel 8, cools the surfaces of the magnetic steel 13 and the stator core 22 of the front rotor 1, and then flows out through the air outlet 9; in the cooling process, cooling air directly fully contacts with magnet steel, stator core and stator coil, can carry out direct efficient cooling to axial magnetic motor, effectively promotes the thermal behavior of motor.
Optionally, in this embodiment, the magnetic steel on the front rotor 1 and/or the rear rotor 3 adopts an oblique pole type structure, so that the rotor can serve as a centrifugal fan to generate a certain amount of air during rotation, and the cooling effect on the motor is enhanced.
In order to further enhance the cooling effect, as an alternative embodiment, as shown in fig. 5, a circumferential bottom of the stator support 21 is further provided with a plurality of rows of heat dissipation ribs 212 arranged along circumferences with different radii, and the heat dissipation ribs 212 are arranged on the circumferential bottom; after the support column 211 conducts the heat generated by the stator coil to the bottom of the stator support, the heat dissipation ribs 212 arranged at the bottom further conduct the heat to the cooling air, so as to enhance the cooling effect on the stator coil 23; in addition, the heat dissipation ribs 212 are arranged in the circumferential direction at the circumferential bottom of the stator support 21, enabling the strength of the stator support 21 to be enhanced; the multi-row radiating ribs are arranged, so that the heat conduction capability is improved, and the cooling effect is enhanced.
In order to further enhance the cooling effect, as an alternative embodiment, as shown in fig. 6 and 7, a U-shaped heat pipe 24 is further disposed on the stator core wound with the stator coil;
one end of the U-shaped heat pipe 24 is axially inserted into the stator core 22 to absorb heat inside the stator core, and the other end of the U-shaped heat pipe 24 is located on the circumferential outer surface of the stator core 22 and is closely attached to the stator coil 23 to dissipate heat of the stator core 22 and the stator coil 23;
in order to further enhance the heat dissipation capability of the U-shaped heat pipe 24 at one end of the circumferential outer surface of the stator core 22 and enhance the heat absorption capability of the U-shaped heat pipe 24 inserted into one end of the stator core 22 along the axial direction, in the present embodiment, the U-shaped heat pipe 24 is located at one end of the circumferential outer surface of the stator core 22 and is provided with a plurality of external heat dissipation fins 241 arranged along the axial direction, and the U-shaped heat pipe 24 is inserted into one end of the stator core 22 along the axial direction and is provided with a plurality of internal heat absorption fins 242 arranged along the radial direction;
as shown in fig. 7, on the stator core 22, respective inner heat sink insertion holes 221 are provided; in order to overcome the problem that the inner heat absorbing sheet 242 has a complex structure and causes difficulty in processing the inner heat absorbing sheet insertion hole 221, as a preferred embodiment, in the present embodiment, the stator core 22 is made of a Soft Magnetic Composite (SMC), and the U-shaped heat pipe 24 and the SMC stator core are directly formed and manufactured together, so that the thermal contact resistance between the SMC stator core and the U-shaped heat pipe can be effectively reduced, and the heat dissipation of the stator core is improved;
based on the above optimized design of the stator structure, the present embodiment can effectively reduce the winding temperature rise and improve the thermal performance of the electric machine, and specifically, the cooling air flow path between the winding coils is as shown in fig. 8.
The air cooling method for the axial flux motor is compact in structure, deeply integrated with a mechanical supporting part and an electromagnetic structure of the motor, fully utilizes the space inside the motor and the function composite capacity of each part, and effectively reduces the volume and the weight of the motor.
Example 2:
an integrated air-cooled axial flux motor is similar to embodiment 1, except that in this embodiment, an air inlet is disposed on a front rotor;
the rest of the structure and the operation principle of the motor can refer to the description of the above embodiment 1, and will not be repeated here.
Example 3:
an integrated air-cooled axial flux motor is similar to embodiment 1, except that in this embodiment, air inlets are formed in both a front rotor and a rear rotor;
the rest of the structure and the operation principle of the motor can refer to the description of the above embodiment 1, and will not be repeated here.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (10)
1. An integrated air-cooled axial flux motor comprises a front rotor, a stator and a rear rotor which are coaxially arranged in sequence, wherein air gaps are respectively formed between the stator and the two rotors, the front rotor and the rear rotor respectively comprise rotor discs, rotor iron cores and magnetic steel, and the integrated air-cooled axial flux motor is characterized in that,
the front rotor and the rear rotor are connected through a casing, and blades which are obliquely arranged are arranged on the casing; the rotor disc of the front rotor and/or the rear rotor is/are provided with an air inlet;
the stator comprises a stator support, a stator core and a stator coil;
a plurality of support columns which are radially and radially arranged are symmetrically arranged at two axial ends of the stator support, and a plurality of U-shaped grooves are formed in the plurality of support columns along the circumferential direction; the support columns at the two ends are connected through the circumferential bottom, and the circumferential bottom is provided with a vent;
the stator iron core is provided with a plurality of stator coils, the stator coils are wound on the stator iron core, and the stator iron cores wound with the stator coils are respectively embedded in one U-shaped groove.
2. An integrated air-cooled axial flux electric machine as claimed in claim 1, wherein the magnetic steel on the front and/or rear rotor is of skewed pole construction.
3. The integrated air-cooled axial flux electric machine of claim 1 or 2, further comprising circumferentially arranged heat dissipating ribs on a circumferential bottom of the stator support.
4. The integrated, air-cooled, axial flux electric machine of claim 3, wherein the plurality of rows of ribs are arranged along different radii of the circumference of the circumferential base.
5. The integrated air-cooled axial flux motor as claimed in claim 1 or 2, wherein the stator core wound with the stator coil is further provided with a U-shaped heat pipe;
and one end of the U-shaped heat pipe is inserted into the stator core along the axial direction, and the other end of the U-shaped heat pipe is positioned on the circumferential outer surface of the stator core and is tightly attached to the stator coil.
6. The integrated air-cooled axial-flux electric machine of claim 5, wherein the U-shaped heat pipe is provided with a plurality of axially arranged external fins at one end of the circumferential outer surface of the stator core.
7. An integrated air-cooled axial-flux electric machine according to claim 5, wherein the U-shaped heat pipe is inserted axially into one end of the stator core, and a plurality of radially arranged internal heat sink fins are provided.
8. The integrated, air-cooled, axial-flux electric machine of claim 7, wherein the stator core is formed from a soft magnetic composite material.
9. The integrated air-cooled axial flux electric machine of claim 8, wherein the stator core and the U-shaped heat pipe are formed by integral molding.
10. The integrated air-cooled axial flux electric machine of claim 1 or 2, wherein each of the plurality of air vents is disposed at an axially intermediate position between two of the axially symmetric support posts on the circumferential bottom of the stator support.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010769341.0A CN111864966B (en) | 2020-08-03 | 2020-08-03 | Integrated air-cooled axial flux motor |
| PCT/CN2020/111209 WO2022027742A1 (en) | 2020-08-03 | 2020-08-26 | Integrated air-cooled axial flux motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010769341.0A CN111864966B (en) | 2020-08-03 | 2020-08-03 | Integrated air-cooled axial flux motor |
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| Publication Number | Publication Date |
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| CN111864966A true CN111864966A (en) | 2020-10-30 |
| CN111864966B CN111864966B (en) | 2021-08-10 |
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| WO (1) | WO2022027742A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383191A (en) * | 2020-11-20 | 2021-02-19 | 安徽大学 | Self-fan cold axial flux motor with external centrifugal fan |
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| CN112688453A (en) * | 2020-12-09 | 2021-04-20 | 诺丁汉(余姚)智能电气化研究院有限公司 | End winding flux motor |
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| CN112383191B (en) * | 2020-11-20 | 2022-08-12 | 安徽大学 | Self-fan cold axial flux motor with external centrifugal fan |
| CN112383193A (en) * | 2020-11-20 | 2021-02-19 | 安徽大学 | Oil-cooled axial flux motor with built-in integrated double-axial-flow fan |
| CN112383194A (en) * | 2020-11-20 | 2021-02-19 | 安徽大学 | Self-cooling axial flux motor with built-in centrifugal fan |
| CN112383192A (en) * | 2020-11-20 | 2021-02-19 | 安徽大学 | Self-cooling axial flux motor with built-in axial flow fan |
| CN112491197A (en) * | 2020-11-20 | 2021-03-12 | 安徽大学 | Oil-cooled axial flux motor with built-in axial flow fan |
| CN112491198A (en) * | 2020-11-20 | 2021-03-12 | 安徽大学 | Self-fan-cooling axial flux motor of hybrid integrated centrifugal fan and axial flow fan |
| CN112491198B (en) * | 2020-11-20 | 2022-04-05 | 安徽大学 | Self-fan-cooling axial flux motor of hybrid integrated centrifugal fan and axial flow fan |
| CN112383193B (en) * | 2020-11-20 | 2022-08-05 | 安徽大学 | Oil-cooled axial flux motor with built-in integrated double-axial-flow fan |
| CN112383191A (en) * | 2020-11-20 | 2021-02-19 | 安徽大学 | Self-fan cold axial flux motor with external centrifugal fan |
| CN112383194B (en) * | 2020-11-20 | 2022-08-12 | 安徽大学 | Self-cooling axial flux motor with built-in centrifugal fan |
| CN112383192B (en) * | 2020-11-20 | 2022-08-26 | 安徽大学 | Self-cooling axial flux motor with built-in axial flow fan |
| CN112688453A (en) * | 2020-12-09 | 2021-04-20 | 诺丁汉(余姚)智能电气化研究院有限公司 | End winding flux motor |
| CN115864772A (en) * | 2023-03-02 | 2023-03-28 | 广州市瑞宝电器有限公司 | High-efficiency direct-current brushless motor device |
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| WO2022027742A1 (en) | 2022-02-10 |
| CN111864966B (en) | 2021-08-10 |
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