CN115296459A - Axial flux permanent magnet synchronous motor for propeller driving - Google Patents
Axial flux permanent magnet synchronous motor for propeller driving Download PDFInfo
- Publication number
- CN115296459A CN115296459A CN202210856439.9A CN202210856439A CN115296459A CN 115296459 A CN115296459 A CN 115296459A CN 202210856439 A CN202210856439 A CN 202210856439A CN 115296459 A CN115296459 A CN 115296459A
- Authority
- CN
- China
- Prior art keywords
- magnetic steel
- fan
- permanent magnet
- magnet synchronous
- propeller
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 30
- 230000004907 flux Effects 0.000 title claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 85
- 239000010959 steel Substances 0.000 claims abstract description 85
- 230000017525 heat dissipation Effects 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 230000000712 assembly Effects 0.000 claims abstract description 5
- 238000000429 assembly Methods 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 25
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000005347 demagnetization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000883990 Flabellum Species 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
- H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2796—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/24—Aircraft characterised by the type or position of power plants using steam or spring force
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
-
- 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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- 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
- H02K3/28—Layout of windings or of connections between windings
-
- 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
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention belongs to the technical field of axial flux permanent magnet synchronous motors, and discloses an axial flux permanent magnet synchronous motor for driving a propeller, which comprises: the middle heat dissipation rotor integrated assembly and the two stator core assemblies are in mirror symmetry with respect to the middle heat dissipation rotor integrated assembly; the heat dissipation rotor integrated component includes: the fan comprises a rotor support, N pieces of magnetic steel, an inner pressing plate, a fan bracket and N pieces of fan blades; the rotor support side surface is uniformly distributed with N magnetic steel mounting holes along the circumference, and the N magnetic steel mounting holes are respectively provided with a step along the radial two ends; the magnetic steel is matched with the magnetic steel mounting hole in shape, the magnetic steel is arranged in the magnetic steel mounting hole, the inner pressing plate is fixed with the rotary self-support through a screw, and the inner pressing plate and the step of the magnetic steel mounting hole are jointly used for axially limiting the magnetic steel; the fan bracket is fixed on the self-supporting circumferential surface through a screw, and is used for radially limiting the magnetic steel; the N fan blades are uniformly arranged on the fan bracket and are positioned on the circumferential surface of the fan bracket.
Description
Technical Field
The invention belongs to the technical field of axial flux permanent magnet synchronous motors, and particularly relates to an axial flux permanent magnet synchronous motor for driving a propeller.
Background
The electric propulsion system provides energy for the airplane and power for overcoming resistance to enable the airplane to fly, and mainly comprises a battery pack, a motor, a controller, a propeller and the like. The battery pack converts chemical energy into electric energy to provide energy required by the airplane; the electric motor converts the electric energy into mechanical energy, and the controller controls the output power required by different flight states; the propeller provides flying power for the airplane.
The axial flux permanent magnet synchronous motor is also called a disc type permanent magnet motor, has the advantages of compact structure, high efficiency, large power density and the like, is suitable for electric vehicles, renewable energy systems, flywheel energy storage systems, industrial equipment and the like, and is particularly suitable for being installed on an airplane electric drive system to meet the requirements of high torque density and occasions with compact space.
The motor temperature rise mainly comes from the stator part, and the temperature rise problem influences the limit capacity, safe operation and service life of the motor. At present, the axial flux permanent magnet synchronous motor mostly adopts liquid cooling or natural cooling. The liquid cooling mode is adopted, the cooling effect of the motor is good, but the power density of the motor is influenced by the liquid cooling related structural components, so that the motor is not suitable for being installed in occasions with compact space, such as airplanes and the like; the air cooling mode is adopted, the quality of the motor is reduced, the power density of the electric drive system is improved, the influence on the power and the torque of the motor is large, and the large torque requirement of the high-speed large-diameter propeller cannot be met.
The fan is generally settled in motor end cover or stator side, and in the middle of the motor operation process, the magnet steel performance of being heated magnetization can descend, still can lead to the magnet steel demagnetization when serious, greatly reduced motor security and reliability. And the permanent magnet adopts the surface-mounted type mostly, increases the axial length of the motor, and reduces the power density of the motor.
For an axial flux permanent magnet synchronous motor for driving an onboard propeller, on the premise that liquid cooling heat dissipation is not applicable, the electromagnetic performance of a motor is improved, and the structure of a stator part and a rotor part of the motor needs to be optimized; in order to meet the requirement of the propeller for large torque, the heat dissipation mode of the motor needs to be improved, and the internal heat dissipation structure is optimized.
Disclosure of Invention
At present, the axial magnetic flux driving motor for the propeller has the problems of poor cooling performance, low loading capacity, low power density and the like, and in order to solve the problems, the invention provides the axial magnetic flux permanent magnet synchronous motor for the propeller driving, wherein air cooling is adopted for cooling, a liquid cooling structural component is omitted, the quality of the motor is reduced, and the large torque requirement and the power grade requirement of the propeller can be met; and the structural design reduces the internal structural stress of the rotor, enhances the overall reliability of the motor, and prolongs the service life of the rotor
The invention designs a novel axial flux permanent magnet synchronous motor structure aiming at the problems of low power density, poor heat dissipation effect, uneven heat dissipation and the like of an axial flux permanent magnet synchronous motor for a propeller so as to solve the problems in the prior art and avoid the conditions of magnetic steel demagnetization of a motor, motor failure and the like caused by the problems.
An axial flux permanent magnet synchronous motor for propeller drive comprising: the middle heat dissipation rotor integrated assembly and the two stator core assemblies are in mirror symmetry with respect to the middle heat dissipation rotor integrated assembly;
the heat dissipation rotor integrated component includes: the fan comprises a rotor support, N pieces of magnetic steel, an inner pressing plate, a fan bracket and N pieces of fan blades;
the rotor support side surface is uniformly distributed with N magnetic steel mounting holes along the circumference, and the N magnetic steel mounting holes are respectively provided with a step along the radial two ends; the magnetic steel is matched with the magnetic steel mounting hole in shape, the magnetic steel is arranged in the magnetic steel mounting hole, the inner pressing plate is fixed with the rotary self-support through a screw, and the inner pressing plate and the step of the magnetic steel mounting hole are jointly used for axially limiting the magnetic steel;
the fan bracket is fixed on the self-supporting circumferential surface through a screw, and is used for radially limiting the magnetic steel;
the N fan blades are uniformly arranged on the fan bracket and are positioned on the circumferential surface of the fan bracket.
Further, the vertex angle of the magnetic steel is subjected to fillet transition treatment.
Furthermore, each fan blade corresponds to one magnetic steel, the fan blades are axially overlapped with the magnetic steel, and the fan blades and the fan support synchronously rotate along with the heat dissipation rotor integrated assembly.
Furthermore, the blades are fixed with the fan bracket in an argon arc welding mode.
Further, each stator core assembly comprises a stator core and 18 windings; under the pole slot matching mode of 10 pairs of pole 18 slots, the slot pitch angle is 400 degrees, and the pole pitch is 9/10.
Furthermore, each winding is in a Y-connection three-phase winding form, and each phase occupies 6 slots; the winding mode adopts a mirror symmetry mode.
Furthermore, the two stator windings are connected in parallel to form double three phases, and are powered on simultaneously to output torque of the propeller, and the two stator windings are mutually backup.
Further, the fan blades, the fan bracket, the rotary self-supporting plate and the inner pressing plate are all made of non-magnetic materials.
Compared with the prior art, the invention has the beneficial effects that:
the invention designs a novel axial flux permanent magnet synchronous motor structure aiming at the problems of low power density, poor heat dissipation effect, uneven heat dissipation and the like of an axial flux permanent magnet synchronous motor for a propeller so as to solve the problems in the prior art and avoid the conditions of magnetic steel demagnetization of a motor, motor failure and the like caused by the problems.
The permanent magnet synchronous motor is particularly applied to a permanent magnet synchronous motor for driving a propeller of a light electric aircraft of a certain model, and the heat dissipation capacity, the loading capacity and the reliability of the motor are remarkably improved through a matched test with an electric drive system controller.
Drawings
FIG. 1 is a basic architecture diagram of an axial-flux electric machine;
FIG. 2 is a heat dissipating rotor assembly structure;
FIG. 3 is a rotor support structure view;
FIG. 4 is a view of the fan assembly;
FIG. 5 is a structural drawing of magnetic steel;
FIG. 6 is a view of the inner platen structure;
FIG. 7 is an assembly sequence diagram;
FIG. 8 is a schematic view of a magnetic circuit;
FIG. 9 is a flow chart of magnetic steel design;
10-heat dissipation rotor integrated assembly, 20-mirror symmetry stator core assembly, 201-fan blade, 202-fan bracket, 203-magnetic steel, 204-pressing plate, 205-rotor support.
Detailed Description
In view of the drawbacks of the prior art, the present invention relates to an axial flux permanent magnet synchronous motor, the basic structure of which is shown in fig. 1. The structure mainly comprises a heat dissipation rotor integrated assembly 10 and a mirror symmetry stator core assembly 20.
The rotor structure of the motor integrates the fan assembly and the rotor, the heat generated by stator core windings on two sides is dissipated, the heat is guaranteed not to be deposited on the permanent magnet, the fan assembly does not occupy the axial space of the motor, the increase of the mass and the space of the motor is far smaller than that of the liquid cooling assembly, the rotating speed and the safe operation of the motor are met, and meanwhile the loading capacity and the torque density of the motor are improved.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the axial flux permanent magnet synchronous motor comprises a central heat dissipation rotor integrated assembly and mirror symmetry stator core assemblies 20 on two sides.
As shown in fig. 2, the heat dissipation-permanent magnet integrated rotor mechanism includes fan blades 101, a fan bracket 12, magnetic steel 103, an inner pressure plate 104, and a rotor support 105. Wherein flabellum 101, fan bracket 102 constitute fan assembly jointly and are used for helping the heat dissipation, and magnet steel 103 is used for providing the magnetic potential for the motor, and interior clamp plate 104 is used for fixed magnet steel 103, and as shown in fig. 3, rotor support 105 provides the assembly support for all the other spare parts as the core support of whole rotor, a rotor supports side along circumference evenly distributed N magnet steel mounting hole, N magnet steel mounting hole is equipped with a step respectively along radial both ends.
The fan blades 101, the fan bracket 102 and the pressure plate 104 are all made of stainless steel made of 1Cr18Ni9Ti, the heat treatment temperature is 850-930 ℃, and the processing requirement can be met.
As shown in fig. 4, the total 20 fan blades 101 are located on the outer ring of the magnetic steel 3, are uniformly circumferentially distributed along the rotor support 105, and are uniformly welded to the fan support 102 in an argon arc welding manner to form a fan assembly; the fan bracket 2 is provided with 20 threaded holes distributed along the circumference of the outer ring, the threaded holes are fixed on the rotor support through screws, the assembly positions are overlapped with the magnetic steel in the axial direction, the axial space of the motor is not occupied, and the fan bracket synchronously rotates along with the rotor when the motor runs.
As shown in fig. 5, the magnetic steel 103 is made of N42EH sintered neodymium iron boron, and has 10 pairs of N-S poles which are alternately arranged and uniformly distributed along the rotor support 105, and the magnetic steel 103 is provided with two steps along the outer diameter and the inner diameter of the rotor respectively for being matched with the groove of the rotor support 105 for assembly and positioning. The rotor support 105 is provided with a groove at a corresponding position along the circumferential direction, and the inner and outer circular steps of the magnetic steel 3 are arranged in the groove during assembly to be directly positioned, so that the uniform distribution of 20 magnetic steels 103 is ensured; fan bracket 102 simultaneously as the clamp plate of magnet steel external diameter step, support 105 assembly fixed with the rotor through the screw for guarantee that the outer circumference of magnet steel is fixed, support with the rotor when the motor is high-speed rotatory and provide radial support for the magnet steel jointly, overcome centrifugal force with safety, prevent magnet steel fracture damage, when the motor is high-speed rotatory, the magnet steel can receive great radial thrust, this kind of magnet steel fixed mode gives the magnet steel in order to support in radial direction, the direction of support is opposite with magnet steel atress direction, offset magnet steel internal stress, prevent the magnet steel fracture, the extension magnet steel life-span.
As shown in fig. 6, the inner pressure plate 104 is fixed to the rotor support 105 by screws, so as to ensure that the inner circumference of the magnetic steel is fixed, and when the motor rotates at high speed, the inner pressure plate and the rotor support together provide radial support for the magnetic steel, so as to safely overcome centrifugal force and prevent the magnetic steel from being cracked and damaged.
Fillet transition treatment is carried out at the vertex angle of the magnetic steel 103 assembly position, the size of the upper vertex angle is phi 1, and the size of the lower vertex angle is phi 2. The internal stress of the magnetic steel 3 to the rotor support during the motor operation is effectively avoided, the abrasion and cracking of the magnetic steel 103 during the motor operation are reduced, the stability of the whole rotor assembly is enhanced, and the service lives of the magnetic steel 103 and the rotor support 105 are prolonged.
The design method of phi 1 and phi 2 comprises the following steps: modeling and sweeping subdivision are carried out on the unprocessed magnetic steel, load definition (including rotating speed and moment in the whole flight section) is given, stress distribution is calculated, and the part where the equivalent stress value exceeds the yield point of the material is judged, a critical boundary with phi 1 and phi 2 as the maximum deformation allowance of the diameter is defined at the position, and the model is modified to carry out cyclic check until the maximum equivalent stress value does not exceed the yield point of the material, so that the calculation is finished. As shown in fig. 9.
The inner pressing plate is arranged on the surface of the magnetic steel 103 and is assembled and fixed with the rotor support 105 through screws for fixing the magnetic steel 103, a surface embedded structure is formed, the magnetic steel 103 can safely overcome centrifugal force when a motor runs at high speed, and the reliability is improved compared with that of the common surface-mounted magnetic steel.
As shown in fig. 7, the assembly sequence of the entire rotor is: the magnetic steel is positioned on the rotor support, then the fan support with the welded fan blades is fastened with the rotor support through screws, the fixation of the outer circumference of the magnetic steel is completed, finally the inner pressing plate is fastened with the rotor support through screws, the fixation of the inner circumference of the magnetic steel is completed, and the rotor assembly is completed. Because the fan assembly, the rotor support and the inner pressure plate are all made of non-magnetic materials (do not participate in a magnetic loop), the whole process can be directly assembled in sequence without other tools or clamps.
The magnetic steel is fixed in the assembling sequence to form the surface embedded magnetic steel. The total thickness of the magnetic steel is 9.8, the protruding thickness of the magnetic steel on one side (A side) of the surface where the fan blades are located is 1.9mm after the assembly sequence is carried out, and the protruding thickness of the magnetic steel on one side (B side) of the surface where the rotor is supported is 0.4mm. Compared with a common surface-mounted permanent magnet synchronous motor, the axial space is saved by 9.8mm; meanwhile, the embedded permanent magnet synchronous motor has the advantages of good saliency, reduces the eddy current loss of the rotor and improves the weak magnetic speed-up performance. See fig. 7.
As shown in fig. 8, the magnetic circuit loop formed by the above structure has the following sequence: from the N pole, the magnetic flux reaches the S pole through the air gap-core-air gap, then passes through the air gap-core-air gap on the other side, and then returns to the S stage.
The mirror-symmetric stator core assembly 20 is formed by two identical stator assemblies arranged in a mirror-image manner, so as to form a stator assembly structure facing to each other; each stator assembly comprises a stator core and 18 windings; under the pole-slot matching mode of 10 pairs of poles and 18 slots, the slot pitch angle is 400 degrees, and the pole pitch is 9/10.
In the mirror symmetry stator core assembly 20, the winding adopts a fractional slot concentrated winding design, the number of each stator slot is 18, the magnetic flux saturation of the core tooth part is avoided, and the slot utilization rate is improved;
each stator winding is in a Y-connection three-phase winding form, and each phase occupies 6 slots; the winding mode adopts a mirror symmetry mode, namely, the windings opposite in mirror image are in the same phase, the winding directions are opposite, the positions of outgoing lines are the same, the length of the end part of the winding can be reduced to the greatest extent, the loss is reduced, and the internal space of the motor is saved;
the two stator windings are connected in parallel to form double three phases, and are electrified simultaneously to output torque of the propeller, and the double three phases are mutually backup. One stator winding fails due to impact or short circuit, and the other stator winding can work for a short time to maintain a task, so that the safety of the electric drive system and the reliability of the airplane during flying are improved.
The axial flux permanent magnet synchronous motor for the propeller of a certain model is used on a propulsion system of a light electric airplane, the rated rotation speed of the motor is 1960rpm, the power density is 3.5kW/kg, the efficiency of the motor is 95 percent, the motor and a matched controller work cooperatively, the temperature of a winding part of the motor is 57 ℃ when the motor is in overload working condition (takeoff state) for 3min, and the heat dissipation condition is good. Therefore, the motor cannot generate failure problem due to heat accumulation in the take-off process.
Claims (8)
1. An axial flux permanent magnet synchronous motor for propeller driving is characterized in that: the motor includes: the middle heat dissipation rotor integrated assembly and the two stator core assemblies are in mirror symmetry with respect to the middle heat dissipation rotor integrated assembly;
the heat dissipation rotor integrated component includes: the fan comprises a rotor support, N pieces of magnetic steel, an inner pressing plate, a fan bracket and N pieces of fan blades;
the rotor supporting side surface is uniformly distributed with N magnetic steel mounting holes along the circumference, and the N magnetic steel mounting holes are respectively provided with a step along the radial two ends; the magnetic steel is matched with the magnetic steel mounting hole in shape, the magnetic steel is arranged in the magnetic steel mounting hole, the inner pressing plate is fixed with the rotary self-support through a screw, and the inner pressing plate and the step of the magnetic steel mounting hole are jointly used for axially limiting the magnetic steel;
the fan bracket is fixed on the self-supporting circumferential surface through a screw, and is used for radially limiting the magnetic steel;
the N fan blades are uniformly arranged on the fan bracket and are positioned on the circumferential surface of the fan bracket.
2. The axial flux permanent magnet synchronous motor for driving a propeller according to claim 1, characterized in that: and performing fillet transition treatment on the vertex angle of the magnetic steel.
3. The axial flux permanent magnet synchronous motor for propeller drive according to claim 1, characterized in that: each fan blade corresponds to one magnetic steel, the fan blades are axially overlapped with the magnetic steel, and the fan blades and the fan support synchronously rotate along with the heat dissipation rotor integrated assembly.
4. The axial flux permanent magnet synchronous motor for propeller drive according to claim 1, characterized in that: the blades are fixed with the fan bracket in an argon arc welding mode.
5. The axial flux permanent magnet synchronous motor for driving a propeller according to claim 1, characterized in that: each stator core assembly comprises a stator core and 18 windings; under the pole slot matching mode of 10 pairs of pole 18 slots, the slot pitch angle is 400 degrees, and the pole pitch is 9/10.
6. The propeller-driving axial flux permanent magnet synchronous motor according to claim 5, wherein: each winding is in a Y-connection three-phase winding form, and each phase occupies 6 slots; the winding mode adopts a mirror symmetry mode.
7. The propeller-driving axial flux permanent magnet synchronous motor according to claim 5, wherein: the two stator windings are connected in parallel to form double three phases, and are powered on simultaneously to output torque of the propeller, and are backup to each other.
8. The propeller-driving axial flux permanent magnet synchronous motor according to claim 5, wherein: the fan blade, the fan bracket, the rotary self-supporting plate and the inner pressing plate are all made of non-magnetic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856439.9A CN115296459A (en) | 2022-07-20 | 2022-07-20 | Axial flux permanent magnet synchronous motor for propeller driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856439.9A CN115296459A (en) | 2022-07-20 | 2022-07-20 | Axial flux permanent magnet synchronous motor for propeller driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115296459A true CN115296459A (en) | 2022-11-04 |
Family
ID=83823591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210856439.9A Pending CN115296459A (en) | 2022-07-20 | 2022-07-20 | Axial flux permanent magnet synchronous motor for propeller driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115296459A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220077745A1 (en) * | 2019-01-15 | 2022-03-10 | Gkn Sinter Metals Engineering Gmbh | Electric Motor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6750588B1 (en) * | 2002-06-03 | 2004-06-15 | Christopher W. Gabrys | High performance axial gap alternator motor |
| CN111884456A (en) * | 2019-11-22 | 2020-11-03 | 山东精创磁电产业技术研究院有限公司 | Rotor assembly and axial magnetic field motor |
| CN212278001U (en) * | 2020-05-22 | 2021-01-01 | 杭州中豪电动科技有限公司 | Rotor disc of disc type motor |
| CN112383194A (en) * | 2020-11-20 | 2021-02-19 | 安徽大学 | Self-cooling axial flux motor with built-in centrifugal fan |
| CN112865369A (en) * | 2021-03-11 | 2021-05-28 | 江苏华力易电科技有限公司 | Disk type motor rotor |
| DE102020007189A1 (en) * | 2020-11-24 | 2022-05-25 | Josef Schnöll | Electric motor with air bearings, integrated ring propeller and ring winding with internal stator cooling |
| CN114678978A (en) * | 2022-03-17 | 2022-06-28 | 上海盘毂动力科技股份有限公司 | Axial magnetic field motor rotor |
-
2022
- 2022-07-20 CN CN202210856439.9A patent/CN115296459A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6750588B1 (en) * | 2002-06-03 | 2004-06-15 | Christopher W. Gabrys | High performance axial gap alternator motor |
| CN111884456A (en) * | 2019-11-22 | 2020-11-03 | 山东精创磁电产业技术研究院有限公司 | Rotor assembly and axial magnetic field motor |
| CN212278001U (en) * | 2020-05-22 | 2021-01-01 | 杭州中豪电动科技有限公司 | Rotor disc of disc type motor |
| CN112383194A (en) * | 2020-11-20 | 2021-02-19 | 安徽大学 | Self-cooling axial flux motor with built-in centrifugal fan |
| DE102020007189A1 (en) * | 2020-11-24 | 2022-05-25 | Josef Schnöll | Electric motor with air bearings, integrated ring propeller and ring winding with internal stator cooling |
| CN112865369A (en) * | 2021-03-11 | 2021-05-28 | 江苏华力易电科技有限公司 | Disk type motor rotor |
| CN114678978A (en) * | 2022-03-17 | 2022-06-28 | 上海盘毂动力科技股份有限公司 | Axial magnetic field motor rotor |
Non-Patent Citations (1)
| Title |
|---|
| 苏绍禹: "永磁电动机机理、设计及应用 第2版", 30 November 2019, 机械工业出版社 , pages: 148 - 149 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220077745A1 (en) * | 2019-01-15 | 2022-03-10 | Gkn Sinter Metals Engineering Gmbh | Electric Motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210119499A1 (en) | Electric motors for aircraft propulsion and associated systems and methods | |
| Zhang et al. | Design and optimization of Halbach-array PM rotor for high-speed axial-flux permanent magnet machine with ironless stator | |
| EP2564492B1 (en) | Synchronous generator, especially for wind turbines | |
| JP2016013054A (en) | Permanent magnet machine | |
| CA2694353C (en) | A device and method to clamp and lock permanent magnets and improve cooling within a rotating electrical machine using pitched focused flux magnets | |
| EP2418756A1 (en) | Permanent magnet rotating electric machine | |
| CN109713819A (en) | A kind of high intensity Halbach permanent magnet array rotor structure | |
| US9631516B2 (en) | Drive of a tail rotor of a helicopter | |
| CN102983680A (en) | Air and water hybrid cooling high-speed permanent-magnet motor | |
| EP3082224B1 (en) | System and method for supporting laminations of synchronous reluctance motors | |
| CN105186740B (en) | A kind of inertia energy storage system | |
| CN102130551A (en) | Dual-stator magnetic-suspension permanent magnet generator | |
| CN115296459A (en) | Axial flux permanent magnet synchronous motor for propeller driving | |
| CN207504659U (en) | Ultrahigh speed permanent magnet disc motor | |
| Ibrahim et al. | A novel toroidal permanent magnet motor structure with high torque density and enhanced cooling | |
| CN101557132B (en) | Salient pole synchronous motor rotor intermagnetic pole bracing structure | |
| Jike et al. | Design and fabrication of dual-rotor motors with axially extended stator for electrified aircraft propulsion | |
| CN109412282A (en) | A kind of multiphase fault-tolerant magneto | |
| CN101741177A (en) | Cooling mechanism of power generator | |
| Jordan et al. | Comparison of two transverse flux machines for an aerospace application | |
| CN111953109B (en) | Double-layer whole-distance winding axial magnetic field permanent magnet synchronous motor | |
| CN112968542A (en) | Brushless claw-pole motor structure | |
| JP2000139046A (en) | Generator and motor using permanent magnet | |
| CN116488420B (en) | Overload-resistant axial flux motor | |
| CN112688519B (en) | Stator permanent magnet type axial magnetic field permanent magnet motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |