WO2022204992A1 - 电机转子、电机及电动汽车 - Google Patents
电机转子、电机及电动汽车 Download PDFInfo
- Publication number
- WO2022204992A1 WO2022204992A1 PCT/CN2021/084116 CN2021084116W WO2022204992A1 WO 2022204992 A1 WO2022204992 A1 WO 2022204992A1 CN 2021084116 W CN2021084116 W CN 2021084116W WO 2022204992 A1 WO2022204992 A1 WO 2022204992A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- iron core
- permanent magnet
- web
- motor rotor
- back yoke
- Prior art date
Links
- 239000000463 material Substances 0.000 claims abstract description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 227
- 230000000670 limiting effect Effects 0.000 claims description 36
- 238000002955 isolation Methods 0.000 claims description 23
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 13
- 230000005415 magnetization Effects 0.000 description 26
- 238000010586 diagram Methods 0.000 description 21
- 238000009434 installation Methods 0.000 description 20
- 230000004907 flux Effects 0.000 description 14
- 230000009286 beneficial effect Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 238000011900 installation process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 238000011089 mechanical engineering Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000828 alnico Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- WBWJXRJARNTNBL-UHFFFAOYSA-N [Fe].[Cr].[Co] Chemical compound [Fe].[Cr].[Co] WBWJXRJARNTNBL-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding 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
-
- 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
- H02K1/2798—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/10—Air crafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
-
- 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
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- 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
- 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
Definitions
- the present application relates to the technical field of motors, and in particular, to a motor rotor, a motor and an electric vehicle.
- Axial flux motor is also called disk permanent magnet motor. Due to its large air gap plane and compact structure, it has the characteristics of high torque density and high power density, and the axial flux motor is small in size, light in weight and widely used in It is used in mechanical engineering such as electric vehicles and aircraft propulsion systems.
- the axial flux motor includes a stator and a motor rotor.
- the stator is a coil
- the motor rotor is a permanent magnet or a disk with a permanent magnet.
- the reluctance torque of the rotor of the axial flux motor is small, which makes the torque output capability of the motor poor, resulting in insufficient power of the axial flux motor, large amount of permanent magnets, and high cost.
- the application provides a motor rotor, a motor and an electric vehicle, and the application can increase the reluctance torque of the motor rotor to improve the torque output capability of the motor.
- the present application provides a motor rotor, comprising an iron core back yoke, a web and at least two permanent magnets, the iron core back yoke is disc-shaped, and the iron core back yoke includes an axial direction and a circumferential direction, At least two of the permanent magnets are fixedly connected to the back yoke of the iron core, and are distributed in sequence along the circumferential direction, the spokes are located between the adjacent permanent magnets, and the reluctance of the spokes is less than The reluctance of air or of the webs is less than that of the permanent magnet material.
- the web and the iron core back yoke can be integrally formed, which reduces the installation process, and the structure is simple and the integral structure enables the motor rotor to have high structural strength and good stability.
- the web and the back yoke of the iron core can also be in a separate structure, and the web is fixed to the back yoke of the iron core by means of bonding or the like.
- the web can be made of the same material as the iron core back yoke or other materials with small magnetic resistance, which is not limited in this application.
- both the core back yoke and the webs can be soft magnetic materials.
- Permanent magnet materials include AlNiCo permanent magnet alloys, FeCrCo permanent magnet alloys, permanent magnet ferrites, rare earth permanent magnet materials and composite permanent magnet materials.
- the magnetoresistance of different permanent magnet materials is different.
- the magnetoresistance of the web is smaller than the magnetoresistance of the permanent magnet material in this application means that the magnetoresistance of the web is smaller than the magnetoresistance of the permanent magnet material with the smallest magnetoresistance.
- a quadrature-axis magnetic circuit is reserved between adjacent permanent magnets, and a web whose reluctance is smaller than that of air or permanent magnet material is arranged on the quadrature-axis magnetic circuit, that is, a web is arranged between adjacent permanent magnets.
- the motor is mainly used to output torque. If the torque is too small and the power is insufficient, the object to be brought cannot be carried.
- Reluctance torque is a kind of torque, and improving the utilization rate of reluctance torque can improve the overall torque output capability of the motor.
- the reluctance torque is related to the quadrature axis inductance and the direct axis inductance. The greater the difference between the quadrature axis inductance and the direct axis inductance, the more obvious the salient pole effect of the motor, and the greater the reluctance torque. If there is no web, there will be air or permanent magnets in other magnetization directions between two adjacent permanent magnets (permanent magnets in other magnetization directions are permanent magnet materials), and the reluctance of both air and permanent magnet materials is relatively large.
- the quadrature axis inductance can be increased, that is, the difference between the quadrature axis inductance and the direct axis inductance can be increased. , which can effectively increase the reluctance torque and improve the torque output capability of the motor.
- the motor torque includes reluctance torque and permanent magnet torque.
- the motor rotor of the present application has a simple structure, a more flexible design, and can better meet the diverse performance requirements of the motor in different application scenarios.
- the dimension of the web in the axial direction is larger than the dimension of the web in the circumferential direction.
- Part of the direct-axis magnetic circuit passes through the web in the circumferential direction, so the web can also increase the direct-axis inductance.
- the increase of the shaft inductance is greater than that of the straight-axis inductance, so that the difference between the quadrature-axis inductance and the straight-axis inductance can be increased, the reluctance torque can be increased, and the torque output capability of the motor can be improved.
- the number of the webs between two adjacent permanent magnets is at least two, and they are arranged at intervals along the circumferential direction.
- the increase of permanent magnet material can enhance the magnetization effect and increase the motor torque, and the air or permanent magnet material will increase.
- the increase of magnetic materials can reduce the direct-axis inductance and increase the difference between the quadrature-axis inductance and the direct-axis inductance, so as to increase the reluctance torque and improve the torque output capability of the motor.
- the motor rotor further includes a first permanent magnet, the first permanent magnet is located between the permanent magnet and the web, and the reluctance of the web is smaller than the first permanent magnet Reluctance of permanent magnets.
- the permanent magnets are magnetized along the axial direction, and the magnetization directions of two adjacent permanent magnets are opposite.
- the first permanent magnet is magnetized along the circumferential direction, and the two adjacent permanent magnets are magnetized along the circumferential direction.
- the magnetization directions of at least two first permanent magnets between the two permanent magnets are the same. This combination of permanent magnets with different magnetization directions and the first permanent magnets can effectively improve the magnetization effect of the motor rotor and improve the air quality.
- the gap density can be reduced, and the eddy current loss of the permanent magnet and the first permanent magnet can be reduced. If there is no web, the first permanent magnet will occupy the space between the two adjacent permanent magnets.
- the first permanent magnet has a larger magnetic resistance, a small quadrature-axis inductance, and a small difference between the quadrature-axis inductance and the direct-axis inductance.
- the torque will be smaller, which is not conducive to improving the torque output capability of the motor.
- a web having a magnetic resistance smaller than that of the first permanent magnet is arranged between two adjacent permanent magnets, and the first permanent magnet is located between the permanent magnet and the web, which can effectively increase the quadrature inductance. Improve the utilization of the reluctance torque of the motor.
- the permanent magnet is a fan-shaped structure, and the inner arc and the outer arc of the permanent magnet of the fan-shaped structure are concentric with the iron core (ie, the center of the circle is the same).
- the first straight line segment and the second straight line segment of the permanent magnet of the sector structure can be respectively parallel to the radial direction of the iron core, or an included angle is set between the first straight line end and the second straight line segment and the radial direction of the iron core, there are It is beneficial to reduce the torque ripple and improve the vibration and noise of the motor.
- the permanent magnets are evenly embedded in the accommodating cavity reserved in the iron core.
- the permanent magnets are magnetized along the axial direction, and the magnetization directions of two adjacent permanent magnets are opposite.
- the structure of the permanent magnet is not limited to a fan shape, and the permanent magnet can also be of other shapes, which can be specifically set as required.
- the first permanent magnet may be fan-shaped or rectangular.
- the first permanent magnet is evenly embedded in the space reserved in the iron core, that is, the first permanent magnet is embedded in the space between the iron core pole piece and the iron core web.
- the first permanent magnets are magnetized along the circumferential direction, the magnetization directions of the first permanent magnets on both sides of the web are the same, and the magnetic fields of the permanent magnets and the first permanent magnets are in the same direction as the permanent magnets and the first permanent magnets.
- the adjacent iron core pole pieces gather.
- the web includes a limiting surface, and the limiting surface is in contact with the first permanent magnet, so as to fix the web and the first permanent magnet in the axial direction. magnet.
- the first permanent magnet is located between the permanent magnet and the web. If there is no limit surface, the first permanent magnet will move in the axial direction, which will be detrimental to the structural stability of the motor rotor.
- the web includes a main body part and a limiting part, the main body part is connected to the iron core back yoke, and the limiting part is located at a part of the main body part away from the iron core back yoke. side, the limiting surface is located at the limiting portion.
- the size of the limiting portion is larger than that of the main body portion, the main body portion and the limiting portion form a stepped structure, and the limiting surface is also the stepped surface of the stepped structure.
- the first permanent magnet is located between the permanent magnet and the web. In this embodiment, by setting a limit surface on the web, the position of the first permanent magnet can be limited in the axial direction, so that the first permanent magnet is more stable and cannot be placed on the web. Moving in the axial direction increases the overall stability of the motor.
- the web includes a first end and a second end opposite to each other, the first end is connected to the iron core back yoke, and the size of the web is from the first end to the second end.
- the second end gradually increases, and the limiting surface is a connecting surface between the first end and the second end.
- the core webs may have an inverted trapezoidal structure.
- the webs may be in contact with the permanent magnets, and the webs may also be spaced from the permanent magnets. When the webs and the permanent magnets are spaced apart, the space between the webs and the permanent magnets may be air or other structural members (such as the first permanent magnet), and the size of the webs is gradually limited from the first end to the second end.
- the space formed between the permanent magnet and the iron core web is large at the end close to the iron core back yoke, and the end away from the iron core back yoke is small in size, so that when the first permanent magnet is arranged between the permanent magnet and the web, the The connecting surface between one end and the second end (that is, the limiting surface) can limit the position of the first permanent magnet arranged between the permanent magnet and the web in the axial direction, so that the connection between the permanent magnet and the web is limited.
- the first permanent magnet arranged between the two is more stable and cannot move in the axial direction, thereby increasing the overall stability of the motor.
- the space between the iron core web and the iron core pole piece can be a trapezoidal structure with a narrow upper part and a wide lower part, that is, the space between the iron core web plate and the iron core pole piece can be embedded.
- the first permanent magnet in between may have a trapezoidal structure.
- the web includes a first end and a second end disposed opposite to each other and a connecting portion located between the first end and the second end, the first end and the The iron core is connected to the back yoke, the dimension from the first end to the connection part is gradually reduced, the dimension from the second end to the connection part is gradually reduced, and the limit surface is the second end and the connection part.
- the connecting surface between the connecting parts can be a dumbbell-like structure with large ends and a small middle.
- the space between the webs and the permanent magnets can be air or other structural members (for example, the first permanent magnets).
- the space formed between the permanent magnets and the webs of the iron core is small in size at one end away from the back yoke of the iron core, so that when the first permanent magnet is arranged between the permanent magnets and the webs, the connection surface between the second end and the connecting part (ie Limiting surface) can limit the position of the first permanent magnet in the axial direction, so that the first permanent magnet arranged between the permanent magnet and the web is more stable, cannot move in the axial direction, and increases the overall stability of the motor sex.
- the space between the iron core web and the iron core pole piece can be in a structure where the two ends are small and the middle large, that is, embedded in the iron core web and the iron core pole piece.
- the first permanent magnet in between can be in a structure with two ends being small and the middle being large.
- the motor rotor further includes an iron core pole piece and a lap joint
- the iron core pole piece is located on the side of the permanent magnet away from the iron core back yoke
- the lap joint part connects the The iron core pole piece and the spoke plate
- the first permanent magnet is located between the lap joint and the iron core back yoke. That is, the lap joint blocks the opening between the iron core pole piece and the web, the left and right sides of the first permanent magnet are the iron core pole piece and the web respectively, the upper side of the first permanent magnet is the lap joint, and the lower side is the lap joint.
- the iron core pole piece and the web limit the first permanent magnet in the circumferential direction, so that the first permanent magnet cannot move in the circumferential direction, and the lap joint is in the axial direction to the first permanent magnet. Limiting the position makes the first permanent magnet more stable and cannot move in the axial direction, thereby increasing the overall stability of the motor.
- the direct-axis inductance can be reduced, and the difference between the quadrature-axis inductance and the direct-axis inductance can be increased, so as to increase the reluctance torque and improve the torque output capability of the motor.
- the motor rotor includes an elastic connecting piece, and the elastic connecting piece connects at least two of the first permanent magnets.
- the at least two first permanent magnets are connected together by elastic connecting pieces, and the elastic connecting pieces are retractable so that at least two first permanent magnets can be installed at the same time, which can improve the installation efficiency and simplify the installation process.
- the motor rotor further includes a first permanent magnet
- the first permanent magnet includes a first magnetic part, a second magnetic part and a third magnetic part which are connected in sequence
- the web includes opposite The first end and the second end are provided, and the first side part and the second side part are located between the first end and the second end, and the first end is connected with the iron core back yoke, so The second magnetic portion is located at the second end, the first magnetic portion is located at the first side portion, and the third magnetic portion is located at the second side portion.
- the first permanent magnet is a U-shaped structure, and the first permanent magnet of the U-shaped structure is inverted on the web, so that the permanent magnet structures on both sides of the web (the first magnetic part and the third magnetic part) connected as a whole, easy installation and accurate positioning.
- the motor rotor further includes a first permanent magnet
- the first permanent magnet includes a first magnetic part, a second magnetic part and a third magnetic part which are connected in sequence
- the web includes opposite provided first and second ends, and first and second sides positioned between the first and second ends, the core back yoke, the first end and the The second ends are arranged in sequence in the axial direction
- the second magnetic part is located between the first end and the iron core back yoke
- the first magnetic part is located at the first side part, so
- the third magnetic portion is located on the second side portion.
- the first permanent magnet is a U-shaped structure
- the web is located in the first permanent magnet of the U-shaped structure. The web can limit the position of the first permanent magnet in the axial direction, preventing The movement of the first permanent magnet in the axial direction causes a problem that the structure of the motor rotor is unstable.
- the motor rotor further includes a first permanent magnet, the first permanent magnet includes a first magnetic part, a second magnetic part and a third magnetic part connected in sequence, and the web plate includes a first magnetic part, a second magnetic part and a third magnetic part.
- a plate and a second plate, the first plate and the second plate are spaced apart in the axial direction, the first plate is connected with the iron core back yoke, and the second magnetic part is located in the Between the first plate and the second plate, the first magnetic part and the third magnetic part are located on opposite sides of the web.
- the first permanent magnet is an H-shaped structure
- the second magnetic portion of the first permanent magnet of the H-shaped structure is located between the first plate and the second plate, and the second plate can be in the axial direction.
- the first permanent magnet has a limiting effect on the upper part to prevent the problem that the structure of the motor rotor is unstable due to the movement of the first permanent magnet in the axial direction.
- the motor rotor further includes an iron core pole piece and a magnetic isolation bridge, the iron core pole piece and the iron core back yoke are spaced apart, and the magnetic isolation bridge connects the iron core pole piece and the magnetic isolation bridge.
- the iron core back yoke, the iron core pole piece, the magnetic isolation bridge and the iron core back yoke are surrounded to form a accommodating cavity, and the permanent magnet is located in the accommodating cavity.
- the number of iron core pole pieces is the same as the number of permanent magnets
- the iron core pole pieces are distributed at intervals along the circumferential direction of the iron core back yoke
- the iron core pole pieces and the iron core back yoke are arranged at intervals in the axial direction
- the two magnetic isolation The bridge is located on the lower side of the opposite ends of the iron core pole piece, and the magnetic isolation bridge connects the iron core pole piece and the iron core back yoke, so that the iron core pole piece, the magnetic isolation bridge and the iron core back yoke are formed together to form a accommodating cavity.
- the installation accuracy of the permanent magnets can be improved, the installation and positioning of the permanent magnets can be realized, the assembly process is simplified, and the permanent magnets only need to be installed into the accommodating cavity of matching size during installation, which improves the installation accuracy and installation efficiency, and the assembly and fixing are simple.
- the iron core pole piece, the magnetic isolation bridge and the iron core back yoke can be of a split structure, and the iron core pole piece magnetic isolation bridge is fixed to the iron core back yoke by bonding or the like, or, the iron core pole piece and the magnetic isolation bridge can also be
- the back yoke and the iron core can also have an integrated structure, which reduces the installation process, the structure is simple, and the integrated structure enables the motor rotor to have high structural strength and good stability.
- the iron core pole piece will generate quadrature axis inductance, which can increase the difference between the quadrature axis inductance and the direct axis inductance, which can effectively increase the reluctance torque and improve the torque output capability of the motor.
- the iron core pole piece is on the surface of the permanent magnet, the eddy current coefficient of the iron core pole piece is relatively low, and it is close to the position of the air gap, which can reduce the eddy current loss of the permanent magnet.
- the iron core pole piece is a part of the magnetic circuit. If the iron core pole piece is not installed, the position of the iron core pole piece will now be the air. The reluctance of the air is large, which will lead to a significant reduction in the torque of the motor, which is not conducive to improving the The torque output capability of the motor.
- the permanent magnet is arranged between the iron core back yoke and the iron core pole piece to form a motor rotor with a built-in structure.
- the built-in structure of the motor rotor has obvious salient pole effect and has the advantage of generating a large reluctance torque. .
- making the permanent magnets built-in can increase the quadrature-axis magnetic circuit and improve the salient pole effect of the motor.
- the magnets play a protective role so that the permanent magnets are not easily demagnetized.
- the permanent magnets in the motor rotor are installed in the accommodating cavity, so that the structure of the motor rotor is firm, and the permanent magnets will not cause the structure of the motor rotor to be unstable when subjected to centrifugal force and magnetic pulling force.
- the built-in permanent magnets can also make full use of the reluctance torque generated by the asymmetry of the rotor magnetic circuit of the motor, and can improve the torque output capability of the motor without increasing the amount of permanent magnets.
- the number of iron core pole pieces and permanent magnets can also be two, three, four, five, six, seven, eight, nine, ten, etc., depending on the structure, size and requirements of the motor. Performance settings, which are not limited in this application.
- the dimension of the web in the axial direction is greater than the distance from the surface of the iron core pole piece facing away from the permanent magnet to the iron core back yoke.
- the size of the web in the axial direction is limited to be greater than the distance from the surface of the iron core pole piece facing away from the permanent magnet to the back yoke of the iron core, so as to increase the size of the web in the axial direction, thereby reducing the length of the quadrature-axis magnetic circuit.
- Reluctance increase quadrature inductance, improve the utilization of reluctance torque.
- the present application provides a motor including a stator, a rotating shaft and the motor rotor according to any one of the foregoing embodiments, the motor rotor is mounted on the rotating shaft, and the stator is mounted on the rotating shaft. Specifically, the stator and the two motor rotors are coaxially connected through the rotating shaft.
- the number of motor rotors may be one, and one motor rotor and stator form a single-stator and single-rotor motor. In other embodiments, the number of motor rotors may also be two, and the stator is located between the two motor rotors to form a single-stator double-rotor motor.
- the two rotors in the single-stator double-rotor motor are arranged symmetrically, and the magnetization directions of the respective permanent magnets are opposite.
- the stator may have an iron-core yoke, a yokeless one, or an iron-coreless one.
- the motor of the present application can be an axial flux motor.
- the axial flux motor has the characteristics of high torque density and high power density due to its large air gap plane and compact structure, and the axial flux motor is small in size and weight. It is light and widely used in mechanical engineering such as electric vehicles and aircraft propulsion systems.
- the present application provides an electric vehicle, comprising a transmission shaft, a wheel and the motor according to the second aspect, the transmission shaft connecting the motor and the wheel.
- the motor outputs torque, and the mechanical energy of the motor is transmitted to the wheels through the transmission shaft to drive the wheels to rotate.
- the motor converts the electrical energy of the battery into mechanical energy, and drives the wheels and working devices through the transmission, or directly drives the wheels and working devices.
- the motor is used to output mechanical energy, and the mechanical energy of the motor is transmitted to the wheel through the transmission shaft to drive the wheel to rotate.
- a quadrature-axis magnetic circuit is reserved between adjacent permanent magnets, and a web whose reluctance is smaller than that of air or permanent magnet material is arranged on the quadrature-axis magnetic circuit, that is, a web is arranged between adjacent permanent magnets.
- the motor torque includes reluctance torque and permanent magnet torque. It can be understood that when the required motor torque is fixed, increasing the reluctance torque can reduce the permanent magnet torque accordingly. Reducing the amount of permanent magnets is beneficial to saving manufacturing costs.
- a motor rotor with built-in structure can be formed by arranging the permanent magnet between the iron core back yoke and the iron core pole piece.
- the built-in permanent magnets can also make full use of the reluctance torque generated by the asymmetry of the rotor magnetic circuit of the motor, and can improve the torque output capability of the motor without increasing the amount of permanent magnets.
- FIG. 1 is a schematic structural diagram of an electric vehicle provided by an embodiment of the present application.
- FIG. 2 is a schematic structural diagram of a motor provided by an embodiment of the present application.
- FIG. 3 is an exploded view of a motor rotor provided by an embodiment of the present application.
- FIG. 4 is a schematic structural diagram of an iron core of a motor rotor provided by an embodiment of the present application.
- FIG. 5 is a schematic plan view of a motor rotor according to an embodiment of the present application.
- FIG. 6 is a schematic diagram of a direct-axis magnetic circuit of a motor provided by an embodiment of the present application.
- FIG. 7 is a schematic diagram of a quadrature-axis magnetic circuit of a motor provided by an embodiment of the present application.
- FIG. 8 is a schematic structural diagram of a motor rotor provided by an embodiment of the present application.
- FIG. 9 is a schematic structural diagram of another motor rotor provided by an embodiment of the present application.
- FIG. 10 is a schematic structural diagram of another motor rotor provided by an embodiment of the present application.
- FIG. 11 is a schematic structural diagram of an iron core of another motor rotor provided by an embodiment of the present application.
- FIG. 12 is a schematic structural diagram of an iron core of another motor rotor provided by an embodiment of the present application.
- FIG. 13 is a schematic structural diagram of another motor rotor provided by an embodiment of the present application.
- FIG. 14 is a schematic structural diagram of another motor rotor provided by an embodiment of the present application.
- 15 is a schematic structural diagram of another motor rotor provided by an embodiment of the present application.
- 16 is a schematic structural diagram of an iron core of another motor rotor provided by an embodiment of the present application.
- FIG. 17 is a schematic plan view of a rotor of a motor provided by an embodiment of the present application.
- orientation terms mentioned in the embodiments of the present application such as “upper”, “lower”, “left”, “right”, “inner”, “outer”, etc., only refer to the directions of the drawings, therefore, use The orientation terms are for better and clearer description and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a Limitations of application examples.
- FIG. 1 is a schematic structural diagram of an electric vehicle 10 .
- the electric vehicle 10 includes a chassis 20 , a battery 30 , a propeller shaft 40 , wheels 50 and a motor 60 .
- the electric vehicle 10 is a vehicle powered by an on-board power supply (the on-board power supply can be the battery 30 ) and driven by the motor 60 to drive the wheels.
- the electric vehicle 10 has the advantages of non-polluting, renewable, low noise, high energy efficiency, diversification, simple structure and convenient maintenance. , is the future development direction of transportation.
- the battery 30 provides electrical energy for the motor 60 of the electric vehicle 10 , and the motor 60 converts the electrical energy of the battery 30 into mechanical energy, and drives the wheels 50 and the working device through the transmission device, or directly drives the wheels 50 and the working device.
- the electric vehicle 10 drives the vehicle by electricity, and therefore, the motor 60 and the battery 30 become the key factors affecting its power performance, battery life, safety and reliability.
- the battery 30 and the motor 60 are located on the chassis 20, the battery 30 provides electrical energy for the motor 60, and the motor 60 converts the electrical energy of the battery 30 into mechanical energy.
- the transmission shaft 40 connects the motor 60 and the wheel 50 , the motor 60 outputs mechanical energy, and the mechanical energy of the motor 60 is transmitted to the wheel 50 through the transmission shaft 40 to drive the wheel 50 to rotate.
- the motor 60 of the present application can be an axial flux motor.
- the axial flux motor has the characteristics of high torque density and high power density due to its large air gap plane and compact structure, and the axial flux motor is small in size, It is light in weight and widely used in mechanical engineering such as electric vehicles and aircraft propulsion systems.
- the motor 60 may also be other types of motors, which are not limited in this application.
- FIG. 2 is a schematic structural diagram of the motor 60 .
- the motor 60 includes a stator 601 , a rotating shaft 602 and a motor rotor 61 , and the stator 601 is coaxially connected with the motor rotor 61 .
- the number of the motor rotors 61 may be two, and the stator 601 is located between the two motor rotors 61 to form a single-stator double-rotor motor 60 .
- the motor rotor 61 is mounted on the rotating shaft 602, and the stator 601 is mounted on the rotating shaft 602, that is, the stator 601 and the two motor rotors 61 are coaxially connected through the rotating shaft 602, and an air gap is formed between the stator 601 and the two motor rotors 61.
- the two rotors in the single-stator and double-rotor motor 60 are mirror-symmetrical, and the magnetization directions of the respective permanent magnets are opposite.
- the stator 601 may have an iron-core yoke, may be yokeless, or may be ironless.
- the number of motor rotors 61 may also be one, and one motor rotor 61 and one stator 601 form a single-stator and single-rotor motor 60 .
- the motor rotor 61 on the right side of the stator 601 and the motor rotor 61 on the left side have the same structure and are mirror-symmetrical, and the motor rotor 61 on the right side of the stator 601 has the same structure. It can be seen as the structure after the motor rotor 61 on the left is assembled. That is, the motor rotor 61 on the right has been assembled, and the motor rotor 61 on the left has not yet been assembled in order to reflect the structure before assembly.
- the embodiment of the present application proposes a motor rotor 61 .
- the motor rotor 61 of the present application has a large reluctance torque, which can effectively improve the torque output capability of the motor 60 , and the motor rotor of the embodiment of the present application 61 has simple structure, low installation difficulty and high assembly precision.
- FIG. 3 is an exploded view of the motor rotor 61 .
- the motor rotor 61 includes a housing 62 , an iron core 63 , at least two permanent magnets 64 and a first permanent magnet 65 . At least two permanent magnets 64 and the first permanent magnet 65 are mounted on the iron core 63 , and the iron core 63 is mounted in the casing 62 and fixed in the casing 62 by gluing, injection molding, or the like.
- the casing 62 can protect the iron core 63, the permanent magnets 64 and the first permanent magnets 65, and prevent the iron core 63, the permanent magnets 64 and the first permanent magnets 65 from being damaged during transportation, installation and operation, thereby affecting the performance of the motor rotor 61.
- the casing 62 can enhance the structural strength of the motor rotor 61 and reduce the influence of the centrifugal force of the motor rotor 61 on the structure of the motor rotor 61 when the motor rotor 61 is running at a high speed.
- FIG. 4 is a schematic diagram of the structure of the iron core 63 of the motor rotor 61
- FIG. 5 is a schematic plan view of the motor rotor 61
- the iron core 63 includes an iron core back yoke 631 , a web 632 and an iron core pole piece 633 .
- the iron core back yoke 631 is in the shape of a disc with a hole in the center of the disc shape.
- the iron core back yoke 631 includes a circumferential direction A1 and an axial direction A2.
- At least two permanent magnets 64 are fixed to the core back yoke 631 and are distributed in sequence along the circumferential direction A1 at intervals, and the webs 632 are located between adjacent permanent magnets 64 . In other words, the permanent magnets 64 are also located between two adjacent webs 632 .
- a quadrature-axis magnetic circuit is reserved between two adjacent permanent magnets 64, that is, the web 632 is located on the quadrature-axis magnetic circuit.
- the webs 632 and the core back yoke 631 can be a separate structure, and the webs 632 are fixed to the core back yoke 631 by bonding or the like, or the webs 632 can also be integrated with the core back yoke 631, which reduces installation.
- the process, the structure is simple, and the one-piece structure enables the iron core 63 to have the advantages of high structural strength and good stability.
- the web 632 can be made of the same material as the core back yoke 631 or other materials with small magnetic resistance.
- both the core back yoke 631 and the web 632 can be made of soft magnetic materials.
- the reluctance of the web 632 is less than that of air or the reluctance of the web 632 is less than that of the permanent magnet material.
- the permanent magnets 64 are usually permanent magnets or air.
- webs with a magnetic resistance smaller than air or permanent magnets are provided between the adjacent permanent magnets 64. 632.
- Both the permanent magnet 64 and the first permanent magnet 65 are permanent magnet materials, and the permanent magnet materials include alnico permanent magnet alloys, iron chromium cobalt permanent magnet alloys, permanent magnet ferrites, rare earth permanent magnet materials and composite permanent magnet materials, etc. .
- the magnetoresistance of different permanent magnet materials will be different.
- the magnetoresistance of the web 632 is smaller than the magnetoresistance of the permanent magnet material in this application means that the magnetoresistance of the web 632 is smaller than the magnetoresistance of the permanent magnet material with the smallest magnetoresistance.
- a quadrature-axis magnetic circuit is reserved between adjacent permanent magnets 64 , and a web 632 whose reluctance is smaller than that of air or permanent magnet material is arranged on the quadrature-axis magnetic circuit, that is, between adjacent permanent magnets 64 .
- the provision of the spokes 632 can reduce the reluctance of the quadrature-axis magnetic circuit and increase the quadrature-axis inductance, so as to increase the reluctance torque and improve the torque output capability of the motor 60 .
- the motor 60 is mainly used for outputting torque. If the torque is too small and the power is insufficient, the object to be carried cannot be carried.
- the reluctance torque is a kind of torque, and improving the utilization rate of the reluctance torque can improve the torque output capability of the motor 60 as a whole.
- the reluctance torque is related to the quadrature-axis inductance and the direct-axis inductance. The greater the difference between the quadrature-axis inductance and the direct-axis inductance, the more obvious the salient pole effect of the motor 60 and the greater the reluctance torque.
- the quadrature-axis inductance of the quadrature-axis magnetic circuit can be increased, that is, the quadrature-axis magnetic circuit can be increased.
- the difference between the inductance and the direct-axis inductance can effectively increase the reluctance torque and improve the torque output capability of the motor 60 .
- the motor torque includes reluctance torque and permanent magnet torque. It can be understood that when the required motor torque is fixed, increasing the reluctance torque can reduce the permanent magnet torque accordingly. Reducing the amount of the permanent magnet 64 is beneficial to save the manufacturing cost.
- the motor rotor 61 of the present application has a simple structure, more flexible design, and more controllable parameters, and can better meet the diversified performance requirements of the motor in different application scenarios.
- the iron core pole piece 633 is not provided, only the permanent magnets 64 are arranged on the iron core back yoke 631 at intervals, and the webs 632 are provided between the adjacent permanent magnets 64.
- the webs 632 can also be It plays the role of reducing the magnetic resistance of the quadrature-axis magnetic circuit and increasing the quadrature-axis inductance.
- the first permanent magnet 65 is not provided, but the permanent magnet 64 and the web 632 are spaced apart, that is, when there is air between the permanent magnet 64 and the web 632, the web 632 can also reduce
- the magnetic resistance of the quadrature-axis magnetic circuit increases the function of quadrature-axis inductance, or the first permanent magnet 65 may not be provided, and the permanent magnet 64 is in contact with the web 632 .
- the present application can also provide the iron core pole piece 633 and the first permanent magnet 65 to enhance the performance of the motor rotor 61 .
- the rotor 61 of the motor is provided with the iron core pole piece 633 and the first permanent magnet 65 as an example for description.
- the number of the iron core pole pieces 633 is the same as the number of the permanent magnets 64 , the iron core pole pieces 633 are arranged at intervals along the circumferential direction A1 of the iron core back yoke 631 , and the iron core pole pieces 633 and the iron core back yoke 631 are arranged at intervals in the axial direction A2 .
- a magnetic isolation bridge 634 is arranged between the iron core pole piece 633 and the iron core back yoke 631 , the two magnetic isolation bridges 634 are located on the lower sides of opposite ends of the iron core pole piece 633 , and the magnetic isolation bridge 634 connects the iron core pole piece 633 and the iron core back yoke 631 , so that the iron core pole piece 633 , the magnetic isolation bridge 634 and the iron core back yoke 631 are formed together to form an accommodating cavity 635 , and the permanent magnet 64 is installed in the accommodating cavity 635 .
- the accommodating cavity 635 by arranging the accommodating cavity 635, the installation accuracy of the permanent magnet 64 can be improved, the installation and positioning of the permanent magnet 64 can be realized, and the assembly process can be simplified.
- reinforcing ribs can be provided on the surface of the magnetic isolation bridge 634 facing the web 622 and the surface of the iron core pole piece facing the web 632 to enhance the overall structural strength of the iron core 61 .
- the magnetic isolation bridge 634 may not be provided, and the iron core pole piece 633 is separated from the iron core back yoke 631. Now the permanent magnet 64 is fixed to the iron core back yoke 631, and then the iron core pole piece 633 is fixed to the iron core back yoke 631. on the permanent magnet 64 .
- the iron core pole piece 633, the magnetic isolation bridge 634 and the iron core back yoke 631 can be of a split structure, and the iron core pole piece 633 and the magnetic isolation bridge 634 are fixed to the iron core back yoke 631 by bonding or the like, or, the iron core pole piece 633, the isolation
- the magnetic bridge 634 can also be integrated with the iron core back yoke 631 , which reduces the installation process, the structure is simple, and the integrated structure enables the iron core 63 to have high structural strength and good stability.
- the iron core pole piece 633 will generate quadrature axis inductance, which can increase the difference between the quadrature axis inductance and the direct axis inductance, can effectively increase the reluctance torque, and improve the torque output capability of the motor 60 .
- the iron core pole piece 633 is on the surface of the permanent magnet 64 , the eddy current coefficient of the iron core pole piece 633 is relatively low, and the iron core pole piece 633 is located near the air gap, which can reduce the eddy current loss of the permanent magnet 64 .
- the iron core pole piece 633 is a part of the magnetic circuit.
- the position of the iron core pole piece 633 will now be the air, and the reluctance of the air is relatively large, which will cause the torque of the motor 60 to decrease significantly. , which is not conducive to improving the torque output capability of the motor 60 .
- the arrangement of the permanent magnets 64 on the motor rotor 61 may be surface-mounted or built-in.
- the surface-mounted motor rotor 61 is simple in structure, convenient in installation, small in size and light in weight. However, it is difficult to fix the permanent magnet 64 of the surface-mounted structure.
- the permanent magnet 64 of the surface-mounted structure is subjected to centrifugal force and magnetic pulling force, which will cause the structure of the motor rotor 61 to be unstable, and the surface-mounted permanent magnet 64 will be unstable.
- the motor rotor 61 with the same structure also has disadvantages such as the inability to utilize the reluctance torque, the large amount of the permanent magnet 64, and the large eddy current on the surface of the permanent magnet 64. Therefore, in this embodiment, a motor rotor 61 with a built-in structure can be formed by arranging the permanent magnet 64 between the core back yoke 631 and the core pole piece 633 . Produces the advantage of large reluctance torque. Specifically, the permanent magnet 64 is built in, the quadrature magnetic circuit can be increased, the salient pole effect of the motor 60 can be improved, the motor 60 can obtain better field weakening performance and a wider constant power range, and the eddy current loss of the permanent magnet 64 can be reduced.
- the permanent magnets 64 in the motor rotor 61 are installed in the accommodating cavity 635, so that the structure of the motor rotor 61 is firm, and the permanent magnets 64 will not cause the structure of the motor rotor 61 to be unstable when subjected to centrifugal force and magnetic pull force.
- the permanent magnet 64 is built-in, and the reluctance torque generated by the asymmetry of the magnetic circuit of the motor rotor 61 can be fully utilized, and the torque output capability of the motor 60 can be improved without increasing the amount of the permanent magnet 64 .
- FIG. 4 only schematically shows that the number of iron core pole pieces 633 and permanent magnets 64 (that is, the accommodating cavity 635 ) is eight.
- the number of accommodating chambers 635) can also be two, three, four, five, six, seven, nine, ten, etc., which can be specifically set according to the structure, size and required performance of the motor 60. The application is not limited.
- the first permanent magnet 65 is located between the permanent magnet 64 and the web 632 , and the reluctance of the web 632 is smaller than that of the first permanent magnet 65 . Understandably, the first permanent magnet 65 is a permanent magnet material. When the iron core pole piece 633 is provided, the first permanent magnet 65 is also located between the iron core pole piece 633 and the web 632 . If there is no web 632 , a complete first permanent magnet 65 will be occupied between two adjacent permanent magnets 64 , or there will be no first permanent magnet 65 but air between two adjacent permanent magnets 64 .
- the reluctance of the first permanent magnet 65 is large, the quadrature inductance is small, the difference between the quadrature inductance and the direct inductance is small, and the reluctance torque is small, which is not conducive to improving the torque output capability of the motor 60 .
- the first permanent magnet 65 is located between the permanent magnet 64 and the web 632, which can effectively The quadrature-axis inductance is increased to improve the utilization rate of the reluctance torque of the motor 60 .
- the permanent magnet 64 may be a fan-shaped structure, and the outer arc 641 and the inner arc 642 of the permanent magnet 64 of the fan-shaped structure are concentric with the iron core 63 (ie, the center of the circle is the same).
- the first straight section 643 and the second straight section 644 of the permanent magnet 64 in the sector-shaped structure may be parallel to the radial direction of the iron core 63 , respectively, or the first straight end 643 and the second straight section 644 may be parallel to the radial direction of the iron core 63 . There is an included angle between them, which is beneficial to reduce the torque ripple and improve the vibration and noise of the motor 60 .
- the permanent magnets 64 are evenly embedded in the accommodating cavity 635 reserved in the iron core 63 .
- the permanent magnets 64 are magnetized along the axial direction A2, and the magnetization directions of two adjacent permanent magnets 64 are opposite to each other. It should be noted that the structure of the permanent magnet 64 is not limited to a fan shape, and the permanent magnet 64 can also be of other shapes, which can be specifically set as required.
- the first permanent magnet 65 may be fan-shaped or rectangular.
- the first permanent magnet 65 is evenly embedded in the space reserved in the iron core 63 , that is, the first permanent magnet 65 is embedded in the space between the iron core pole piece 633 and the iron core web 632 .
- the first permanent magnets 65 are magnetized along the circumferential direction A1, the magnetization directions of the first permanent magnets 65 on both sides of the web 632 are the same, and the magnetic fields of the permanent magnets 64 and the first permanent magnets 65 are both directed to the same direction as the permanent magnets.
- the core pole pieces 633 adjacent to the first permanent magnet 64 and the first permanent magnet 65 are gathered.
- the permanent magnet 64 can be fixed to the accommodating cavity 635 by gluing or injection molding, or the first permanent magnet 65 can also be fixed to the core pole piece 633 and the web 632 by gluing or injection molding or injection molding. In between, the bonding strength of the permanent magnet 64 and the first permanent magnet 65 and the iron core 63 is enhanced, the structural strength of the motor rotor 61 is improved, and the structural stability of the motor 60 is enhanced.
- a combination of permanent magnets 64 and first permanent magnets 65 with different magnetization directions is used.
- the permanent magnets 64 are magnetized along the axial direction A2, and the magnetization directions of two adjacent permanent magnets 64 are opposite.
- the first permanent magnets 65 are magnetized along the circumferential direction A1, and the magnetization directions of at least two first permanent magnets 65 between adjacent two permanent magnets 64 are the same. This kind of combination of different magnetization directions is adopted. This method can effectively improve the magnetization effect of the motor rotor 61 , increase the air gap density, and reduce the eddy current loss of the permanent magnet 64 and the first permanent magnet 65 .
- the top surface 645 of the permanent magnet 64 facing away from the core back yoke 631 is higher than the bottom surface 654 of the first permanent magnet 65 facing the core back yoke 631, so as to avoid permanent magnets. Magnetic flux leakage occurs when the top surface 645 of the magnet 64 facing away from the core back yoke 631 is smaller than or equal to the first permanent magnet 65 facing the bottom surface 654 of the core back yoke 631 .
- FIG. 6 is a schematic diagram of a straight-axis magnetic circuit of the motor 60
- FIG. 7 is a schematic diagram of a quadrature-axis magnetic circuit of the motor 60
- the straight-axis magnetic circuit passes through the permanent magnet 64 and the first permanent magnet 65
- the quadrature-axis magnetic circuit does not pass through the permanent magnet 64 and the first permanent magnet 65 . Since the magnetic resistance of the permanent magnet 64 and the first permanent magnet 65 is relatively large, the direct-axis inductance is relatively small, while the magnetic resistance of the web 632 is relatively small (it can also be understood that the overall magnetic resistance of the iron core 63 is relatively small).
- the quadrature-axis inductance of the quadrature-axis magnetic circuit of the 632 is relatively large, which makes the quadrature-axis inductance much larger than the direct-axis inductance, that is, the difference between the quadrature-axis inductance and the direct-axis inductance is large, the salient pole effect of the motor 60 is obvious, and the reluctance torque The increase is beneficial to improve the torque output capability of the motor 60 .
- the direct-axis magnetic circuit and the quadrature-axis magnetic circuit form a complete magnetic circuit through the iron core 63 of the motor rotor 61, the permanent magnet 64 and the stator iron core (not shown in the figure), which increases the main magnetic flux, reduces the magnetic flux leakage, and achieves a concentrated magnetic field.
- the purpose is to improve the air gap magnetic density.
- the directions of the magnetic field lines of the permanent magnet 64 and the first permanent magnet 65 that are in contact with the same iron core pole piece 633 are both directed towards the iron core pole piece 633 or away from the iron core pole piece at the same time. 633, the application of the combination of the permanent magnet 64 and the first permanent magnet 65 can effectively improve the magnetization effect of the motor rotor 61, improve the air gap density, increase the torque output capacity of the motor, and can reduce the permanent magnet 64 and Eddy current loss of the first permanent magnet 65 .
- the dimension D1 of the web 632 in the axial direction A2 is larger than the dimension D2 of the web 632 in the circumferential direction A1.
- the web 632 can also increase the direct-axis inductance by defining that the size of the web 632 in the axial direction A2 is larger than that of the web 632 in the circumferential direction
- the size of A1 can make the quadrature inductance increase more than the direct axis inductance, which can increase the difference between quadrature inductance and direct axis inductance, increase the reluctance torque, and improve the torque output capability of the motor 60 .
- the number of the webs 632 between two adjacent permanent magnets 64 may be one.
- the number of webs 632 between adjacent permanent magnets 64 may also be two, and in other embodiments, the number of webs 632 between adjacent permanent magnets 64 may also be three or four etc., at least two webs 632 are spaced apart along the circumferential direction A1.
- the adjacent webs 632 between two adjacent permanent magnets 64 may be air (that is, no other structures are placed between the adjacent webs) or the first permanent magnet 65 , depending on the number of webs 632 The increase of air or the first permanent magnet 65 will also increase.
- the increase of the first permanent magnet 65 can enhance the magnetic concentration effect and increase the motor torque, and the increase of the air or the first permanent magnet 65 can reduce the direct-axis inductance and increase the The difference between the quadrature-axis inductance and the direct-axis inductance increases the reluctance torque and improves the torque output capability of the motor 60 .
- FIG. 9 is a schematic structural diagram of a rotor 61 of a motor.
- the axial direction A2 at least two permanent magnets 64 are stacked and spaced apart.
- the direct-axis inductance can be reduced, and the difference between the quadrature-axis inductance and the direct-axis inductance can be increased, so as to increase the reluctance torque and improve the torque output of the motor 60 ability.
- the dimension L1 of the web 632 in the axial direction A2 is greater than the distance L2 from the surface of the iron core pole piece 633 facing away from the permanent magnet 64 to the iron core back yoke 631 .
- This embodiment increases the size of the web 632 in the axial direction A2 by limiting the dimension L1 of the web 632 in the axial direction A2 to be greater than the distance L2 from the surface of the iron core pole piece 633 facing away from the permanent magnet 64 to the core back yoke 631 , the reluctance of the quadrature-axis magnetic circuit can be reduced, the quadrature-axis inductance can be increased, the utilization rate of the reluctance torque can be improved, and the torque output capability of the motor 60 can be increased.
- the dimension L1 of the web 632 in the axial direction A2 may also be less than or equal to the distance L2 from the surface of the iron core pole piece 633 facing away from the permanent magnet 64 to the iron core back yoke 631 .
- the web 632 can limit the position of the first permanent magnet 65 in the axial direction A2, the web 632 includes a limiting surface, and the limiting surface is in contact with the first permanent magnet 65 to fix the spoke in the axial direction A2. Plate 632 and first permanent magnet 65 .
- the structure of the web 632 with the limiting surface includes but is not limited to the following three:
- the web 632 includes a main body 6321, a limiting part 6322 and a limiting surface 6323, the main body 6321 is connected to the iron core back yoke 631, and the limiting part 6322 is located on the main body part 6321 away from the iron core back On one side of the yoke 631 , the limiting surface 6323 is located at the limiting portion 6322 , and the first permanent magnet 65 abuts against the limiting surface 6323 .
- the size of the limiting portion 6322 is larger than that of the main body portion 6321 , the body portion 6321 and the limiting portion 6322 form a stepped structure, and the limiting surface 6323 is also a stepped surface of the stepped structure.
- the first permanent magnet 65 is located between the core pole piece 633 and the web 632 . In this embodiment, by disposing the limiting surface 6323 on the web 632, the first permanent magnet 65 can be limited in the axial direction A2, so that the first permanent magnet 65 is more stable and cannot move in the axial direction A2, increasing the The stability of the motor 60 as a whole.
- the side of the iron core pole piece 633 close to the web 632 is also provided with a limit surface 6333, and the limit surface 6333 on the iron core pole piece 633 and the limit surface 6323 on the web 632 are aligned in the axial direction A2.
- a permanent magnet 65 is limited to make the first permanent magnet 65 more stable.
- the web 632 includes a first end 6324 and a second end 6325 disposed opposite to each other, and a connecting surface 605 located between the first end 6324 and the second end 6325 .
- the first end 6324 is connected to the core back yoke 631 , the size of the web 632 gradually increases from the first end 6324 to the second end 6325 , and the limiting surface of the web 632 is the connecting surface 605 .
- the core webs 632 may have an inverted trapezoidal structure.
- the webs 632 may be in contact with the permanent magnets 64 , and the webs 632 may also be spaced from the permanent magnets 64 .
- the space between the webs 632 and the permanent magnets 64 may be air or other structural members (for example, the first permanent magnets 65 ), and the size of the webs 632 is determined by the first permanent magnet 65 .
- One end 6324 to the second end 6325 is gradually enlarged, so that the space formed between the permanent magnet 64, the iron core pole piece 633 and the iron core web 632 is larger in size at one end close to the iron core back yoke 631, and smaller in size at the end away from the iron core back yoke 631
- the connecting surface 605 can limit the position of the first permanent magnet 65 in the axial direction A2, so that the first permanent magnet 65 is more stable , it cannot move in the axial direction A2, which increases the stability of the motor 60 as a whole.
- the space between the iron core web 632 and the iron core pole piece 633 can be a trapezoidal structure with a narrow upper part and a wide bottom, that is, the iron core web 632 is embedded in the
- the first permanent magnet 65 between the iron core pole piece 633 can have a trapezoidal structure with an upper narrow and a lower width, and the first permanent magnet 65 is embedded between the iron core web 632 and the iron core pole piece 633, so the installation difficulty is low, the assembly and fixing are simple, and the positioning is accurate.
- the web 632 includes a first end 6324 and a second end 6325 disposed opposite to each other and a connecting portion 6326 between the first end 6324 and the second end 6325, the second end 6325 and the connecting portion 6326 There are connecting surfaces 606 therebetween.
- the first end 6324 is connected to the core back yoke 631, the size from the first end 6324 to the connecting portion 6326 is gradually reduced, and the size from the second end 6325 to the connecting portion 6326 is gradually reduced, and the limiting surface of the web 632 is the second Connection surface 606 between end 6325 and connecting portion 6326.
- the web 632 may be a dumbbell-shaped structure with large ends and a small middle.
- the space between the webs 632 and the permanent magnets 64 can be either air or the first permanent magnet 65.
- the space formed between the magnets 64 and the iron core webs 632 has a small size at one end away from the iron core back yoke 631, so that when the first permanent magnet 65 is arranged between the permanent magnets 64 and the webs 632, the space between the second end 6325 and the connecting portion 6326 is small.
- the connecting surface 606 between them can limit the position of the first permanent magnet 65 in the axial direction A2 , so that the first permanent magnet 65 is more stable, cannot move in the axial direction A2 , and increases the overall stability of the motor 60 .
- the space between the iron core web 632 and the iron core pole pieces 633 can be in a structure with both ends small and the middle large, that is, embedded in the iron core web 632 .
- the first permanent magnet 65 between the iron core pole piece 633 may have a structure with small ends and a large middle.
- the structural relationship between the first permanent magnet 65 and the web 632 in the present application is not limited to the two first permanent magnets 65 shown in FIG.
- the structural relationship also includes but is not limited to the following three implementations:
- the first permanent magnet 65 includes a first magnetic part 651 , a second magnetic part 652 and a third magnetic part 653 , a first magnetic part 651 and a second magnetic part 652 , which are connected in sequence. Together with the third magnetic portion 653 , the first permanent magnet 65 having a U-shaped structure is formed.
- the web 632 includes opposing first and second ends 6324, 6325, and first and second sides 6327, 6328 located between the first and second ends 6324, 6325 and opposing, the first end 6324 Connected to the core back yoke 631, the second magnetic part 652 is located on the upper side of the second end 6325, the first magnetic part 651 is located on the side where the first side part 6327 is located, and the third magnetic part 653 is located on the side where the second side part 6328 is located side.
- the first permanent magnet 65 with a U-shaped structure is buckled upside down on the web 632, so that the first magnetic part 651 and the third magnetic part 653 on both sides of the web 632 are connected as a whole, and the installation is simple and the positioning is accurate.
- the first permanent magnet 65 includes a first magnetic portion 651 , a second magnetic portion 652 and a third magnetic portion 653 that are connected in sequence, and the web 632 includes oppositely arranged first ends 6324 and a second end 6325, and a first side portion 6327 and a second side portion 6328 located between and opposite the first end 6324 and the second end 6325.
- the iron core back yoke 631 , the first end 6324 and the second end 6325 are arranged in sequence in the axial direction A2 , the second magnetic part 652 is located between the first end 6324 and the iron core back yoke 631 , and the first magnetic part 651 is located in the first On the side where the side portion 6327 is located, the third magnetic portion 653 is located on the side where the second side portion 6328 is located.
- the first permanent magnet 65 has a U-shaped structure
- the web 631 is located in the first permanent magnet 65 of the U-shaped structure, and the web 631 can limit the position of the first permanent magnet 65 in the axial direction A2 , to prevent the problem that the structure of the motor rotor 61 is unstable due to the movement of the first permanent magnet 65 in the axial direction A2.
- the first permanent magnet 65 includes a first magnetic part 651 , a second magnetic part 652 and a third magnetic part 653 , a first magnetic part 651 and a second magnetic part 652 , which are connected in sequence.
- the first permanent magnet 65 of the H-shaped structure is formed together with the third magnetic part 653 .
- the web 632 includes a first plate 603 and a second plate 604.
- the first plate 603 and the second plate 604 are spaced apart in the axial direction A2.
- the first plate 603 is connected to the iron core back yoke 631, and the second magnetic portion 652 is located in the first plate 652.
- the first permanent magnet 65 has an H-shaped structure, and the second magnetic portion 652 of the first permanent magnet 65 of the H-shaped structure is located between the first plate 603 and the second plate 604 , and the second plate 604 can be in the shaft
- the first permanent magnet 65 is limited in the axial direction A2 to prevent the problem that the structure of the motor rotor 61 is unstable due to the movement of the first permanent magnet 65 in the axial direction A2.
- FIG. 16 is another schematic structural diagram of the iron core 63 of the motor rotor 61
- FIG. 17 is a schematic plan view of the motor rotor 61
- the iron core 63 is provided with a lap portion 637
- the lap portion 637 connects the iron core pole piece 633 and the web 632
- the first permanent magnet 65 is located between the lap portion 637 and the iron core back yoke 631 .
- the lap joint 637 blocks the opening between the iron core pole piece 633 and the web 632 , the left and right sides of the first permanent magnet 65 are the iron core pole piece 633 and the web 632 respectively, and the upper side of the first permanent magnet 65 is It is the lap joint 637, the lower side is the iron core back yoke 631, the iron core pole piece 633 and the web 632 limit the first permanent magnet 65 in the circumferential direction A1, so that the first permanent magnet 65 cannot be in the circumferential direction A1.
- the overlapping portion 637 limits the first permanent magnet 65 in the axial direction A2 , so that the first permanent magnet 65 is more stable and cannot move in the axial direction A2 , thereby increasing the overall stability of the motor 60 .
- the core back yoke 631 , the web 632 , the core pole piece 633 and the lap portion 637 can be integrally constructed, so that the structure of the core 63 High strength and high stability.
- the magnetic isolation bridge 634 may not be provided, and the integrated structure of the iron core 63 can also be realized, and the accommodating cavity 635 can be reserved for the permanent magnet 64, which is beneficial to reduce the weight of the motor 60 and save the cost.
- the manufacturing method of the iron core 63 in the present application may be winding stamping, casting and machining, or may be integrally die-casting.
- the present application by reserving the accommodating cavity 635 on the iron core 63, and the accommodating space between the iron core web 632 and the iron core pole piece 633, in this way, during assembly, only the permanent magnet 64 needs to be embedded in the accommodating cavity 635, and the The first permanent magnet 65 is embedded in the accommodating space between the iron core web 632 and the iron core pole piece 633, so that the permanent magnet 64, the first permanent magnet 65 and the iron core 63 can be assembled, with low installation difficulty and high installation efficiency.
- a quadrature-axis magnetic circuit is reserved between adjacent permanent magnets 64 , and a web 632 whose reluctance is smaller than that of air or permanent magnet material is arranged on the quadrature-axis magnetic circuit, that is, between adjacent permanent magnets 64 .
- the provision of the spokes 632 can reduce the reluctance of the quadrature-axis magnetic circuit and increase the quadrature-axis inductance, so as to increase the reluctance torque and improve the torque output capability of the motor 60 .
- the motor torque includes reluctance torque and permanent magnet torque. It can be understood that when the required motor torque is fixed, increasing the reluctance torque can reduce the permanent magnet torque accordingly.
- the present application adopts a combination of permanent magnets 64 and first permanent magnets 65 in different magnetization directions.
- the permanent magnets 64 are magnetized along the axial direction A2, and the magnetization directions of two adjacent permanent magnets 64 are opposite.
- the permanent magnets 65 are magnetized along the circumferential direction A1, and the magnetization directions of at least two first permanent magnets 65 between adjacent two permanent magnets 64 are the same. This combination of different magnetization directions can be used.
- the magnetization effect of the motor rotor 61 is effectively improved, the air gap density is increased, and the eddy current loss of the permanent magnet 64 and the first permanent magnet 65 can be reduced.
- the permanent magnet 64 can be arranged between the iron core back yoke 631 and the iron core pole piece 633 to form the motor rotor 61 with a built-in structure. big advantage.
- the permanent magnet 64 is built-in, and the reluctance torque generated by the asymmetry of the magnetic circuit of the motor rotor 61 can be fully utilized, and the torque output capability of the motor 60 can be improved without increasing the amount of the permanent magnet 64 .
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
Claims (17)
- 一种电机转子,其特征在于,包括铁心背轭、辐板和至少两个永磁体,所述铁心背轭呈圆盘状,所述铁心背轭包括轴向方向和周向方向,至少两个所述永磁体固定连接至所述铁心背轭,且沿所述周向方向依次间隔分布,所述辐板位于相邻的所述永磁体之间,所述辐板的磁阻小于空气的磁阻或所述辐板的磁阻小于永磁材料的磁阻。
- 如权利要求1所述的电机转子,其特征在于,所述辐板在所述轴向方向上的尺寸大于所述辐板在所述周向方向上的尺寸。
- 如权利要求1所述的电机转子,其特征在于,相邻的两个所述永磁体之间的所述辐板的数量至少为两个,且沿所述周向方向间隔排布。
- 如权利要求1所述的电机转子,其特征在于,所述电机转子还包括第一永磁体,所述第一永磁体位于所述永磁体和所述辐板之间,所述辐板的磁阻小于所述第一永磁体的磁阻。
- 如权利要求4所述的电机转子,其特征在于,所述辐板包括限位面,所述限位面与所述第一永磁体接触,以在所述轴向方向上固定所述辐板和所述第一永磁体。
- 如权利要求5所述的电机转子,其特征在于,所述辐板包括主体部和限位部,所述主体部与所述铁心背轭连接,所述限位部位于所述主体部背离所述铁心背轭的一侧,所述限位面位于所述限位部。
- 如权利要求5所述的电机转子,其特征在于,所述辐板包括相对设置的第一端和第二端,所述第一端与所述铁心背轭连接,所述辐板的尺寸由所述第一端至所述第二端逐渐增大,所述限位面为所述第一端和所述第二端之间的连接面。
- 如权利要求5所述的电机转子,其特征在于,所述辐板包括相对设置的第一端和第二端及位于所述第一端和所述第二端之间的连接部,所述第一端与所述铁心背轭连接,所述第一端至所述连接部的尺寸逐渐减小,所述第二端至所述连接部的尺寸逐渐减小,所述限位面为所述第二端和所述连接部之间的连接面。
- 如权利要求4所述的电机转子,其特征在于,所述电机转子还包括铁心极靴和搭接部,所述铁心极靴位于所述永磁体背离所述铁心背轭的一侧,所述搭接部连接所述铁心极靴和所述辐板,所述第一永磁体位于所述搭接部和所述铁心背轭之间。
- 如权利要求1所述的电机转子,其特征在于,在所述轴向方向上,至少两个所述永磁体层叠设置。
- 如权利要求1所述的电机转子,其特征在于,所述电机转子还包括第一永磁体,所述第一永磁体包括依次连接的第一磁部、第二磁部和第三磁部,所述辐板包括相对设置的第一端和第二端,及位于所述第一端和所述第二端之间的第一侧部和第二侧部,所述第一端与所述铁心背轭连接,所述第二磁部位于所述第二端,所述第一磁部位于所述第一侧部,所述第三磁部位于所述第二侧部。
- 如权利要求1所述的电机转子,其特征在于,所述电机转子还包括第一永磁体,所述第一永磁体包括依次连接的第一磁部、第二磁部和第三磁部,所述辐板包括相对设置的第一端和第二端,及位于所述第一端和所述第二端之间的第一侧部和第二侧部,所述铁 心背轭、所述第一端和所述第二端在所述轴向方向上依次排布,所述第二磁部位于所述第一端与所述铁心背轭之间,所述第一磁部位于所述第一侧部,所述第三磁部位于所述第二侧部。
- 如权利要求1所述的电机转子,其特征在于,所述电机转子还包括第一永磁体,所述第一永磁体包括依次连接的第一磁部、第二磁部和第三磁部,所述辐板包括第一板和第二板,所述第一板和所述第二板在所述轴向方向上间隔设置,所述第一板与所述铁心背轭连接,所述第二磁部位于所述第一板和所述第二板之间,所述第一磁部和所述第三磁部位于所述辐板相对的两侧。
- 如权利要求1所述的电机转子,其特征在于,所述电机转子还包括铁心极靴和隔磁桥,所述铁心极靴与所述铁心背轭间隔设置,所述隔磁桥连接所述铁心极靴和所述铁心背轭,所述铁心极靴、所述隔磁桥和所述铁心背轭围设形成容纳腔,所述永磁体位于所述容纳腔内。
- 如权利要求14所述的电机转子,其特征在于,所述辐板在所述轴向方向上的尺寸大于所述铁心极靴背离所述永磁体的表面至所述铁心背轭的距离。
- 一种电机,其特征在于,包括定子、转轴和权利要求1-15任一项所述的电机转子,所述电机转子安装至所述转轴上,且所述定子安装至所述转轴上。
- 一种电动汽车,其特征在于,包括传动轴、车轮和权利要求16所述的电机,所述传动轴连接所述电机和所述车轮。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180090192.8A CN116848756A (zh) | 2021-03-30 | 2021-03-30 | 电机转子、电机及电动汽车 |
EP21933673.2A EP4300775A4 (en) | 2021-03-30 | 2021-03-30 | ELECTRIC MOTOR ROTOR, ELECTRIC MOTOR AND ELECTRIC VEHICLE |
PCT/CN2021/084116 WO2022204992A1 (zh) | 2021-03-30 | 2021-03-30 | 电机转子、电机及电动汽车 |
US18/477,314 US20240039350A1 (en) | 2021-03-30 | 2023-09-28 | Motor rotor, motor, and electric vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2021/084116 WO2022204992A1 (zh) | 2021-03-30 | 2021-03-30 | 电机转子、电机及电动汽车 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/477,314 Continuation US20240039350A1 (en) | 2021-03-30 | 2023-09-28 | Motor rotor, motor, and electric vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022204992A1 true WO2022204992A1 (zh) | 2022-10-06 |
Family
ID=83455388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2021/084116 WO2022204992A1 (zh) | 2021-03-30 | 2021-03-30 | 电机转子、电机及电动汽车 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240039350A1 (zh) |
EP (1) | EP4300775A4 (zh) |
CN (1) | CN116848756A (zh) |
WO (1) | WO2022204992A1 (zh) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2606951B1 (zh) * | 1986-11-13 | 1994-04-22 | Cgee Alsthom | |
CN102624115A (zh) * | 2012-03-14 | 2012-08-01 | 上海海马汽车研发有限公司 | 轴向间隙型电动机的转子及轴向间隙型电动机 |
JP2012249347A (ja) * | 2011-05-25 | 2012-12-13 | Aisin Aw Co Ltd | アキシャルギャップ回転電機のロータ |
CN103915921A (zh) * | 2012-12-31 | 2014-07-09 | 珠海格力节能环保制冷技术研究中心有限公司 | 永磁电机 |
CN111355323A (zh) * | 2020-04-26 | 2020-06-30 | 仪坤动力科技(上海)有限公司 | 一种有极靴复合磁极结构的盘式电机转子 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5292953B2 (ja) * | 2008-07-04 | 2013-09-18 | 本田技研工業株式会社 | アキシャルギャップ型モータ |
KR101886155B1 (ko) * | 2011-10-10 | 2018-08-08 | 삼성전자 주식회사 | 모터 및 모터용 로터 |
JP2017147904A (ja) * | 2016-02-19 | 2017-08-24 | 株式会社ジェイテクト | アキシャルギャップ型回転電機のロータ |
AT522826A1 (de) * | 2019-08-09 | 2021-02-15 | Miba Sinter Austria Gmbh | Rotor |
-
2021
- 2021-03-30 CN CN202180090192.8A patent/CN116848756A/zh active Pending
- 2021-03-30 EP EP21933673.2A patent/EP4300775A4/en active Pending
- 2021-03-30 WO PCT/CN2021/084116 patent/WO2022204992A1/zh active Application Filing
-
2023
- 2023-09-28 US US18/477,314 patent/US20240039350A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2606951B1 (zh) * | 1986-11-13 | 1994-04-22 | Cgee Alsthom | |
JP2012249347A (ja) * | 2011-05-25 | 2012-12-13 | Aisin Aw Co Ltd | アキシャルギャップ回転電機のロータ |
CN102624115A (zh) * | 2012-03-14 | 2012-08-01 | 上海海马汽车研发有限公司 | 轴向间隙型电动机的转子及轴向间隙型电动机 |
CN103915921A (zh) * | 2012-12-31 | 2014-07-09 | 珠海格力节能环保制冷技术研究中心有限公司 | 永磁电机 |
CN111355323A (zh) * | 2020-04-26 | 2020-06-30 | 仪坤动力科技(上海)有限公司 | 一种有极靴复合磁极结构的盘式电机转子 |
Non-Patent Citations (1)
Title |
---|
See also references of EP4300775A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP4300775A1 (en) | 2024-01-03 |
US20240039350A1 (en) | 2024-02-01 |
EP4300775A4 (en) | 2024-05-15 |
CN116848756A (zh) | 2023-10-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6452302B1 (en) | Rotary electric machine and electric vehicle using the same | |
JP5332082B2 (ja) | モータ | |
US8040008B2 (en) | Axial gap motor | |
JP4619585B2 (ja) | リラクタンス型回転電機 | |
CN112467950B (zh) | 一种转子永磁型双转子轴向磁场混合励磁磁通切换电机 | |
CN112564346B (zh) | 一种高转矩密度轴向磁场永磁电机转子结构及其电机 | |
CN111884456B (zh) | 转子组件和轴向磁场电机 | |
US10778061B2 (en) | Flywheel energy storage system | |
CN102570754A (zh) | 一种用于低速大转矩的永磁游标电机 | |
CN112564442A (zh) | 一种轴向磁场双转子永磁游标电机 | |
CN111884368B (zh) | 轴向磁场电机 | |
EP4325694A1 (en) | Rotor, disc-type motor, motor-driven system, and vehicle | |
CN111884364B (zh) | 定转子总成和轴向磁场电机 | |
CN111211659B (zh) | 一种定子模块化环形绕组双转子永磁电机 | |
WO2022204992A1 (zh) | 电机转子、电机及电动汽车 | |
CN115411857A (zh) | 轴向电机转子、轴向电机、动力总成及车辆 | |
CN112713684A (zh) | 一种多向励磁轮毂电机 | |
JPH11275789A (ja) | 回転子 | |
Patil et al. | Design and Comparative Analysis of Axial Flux and Radial Flux Permanent Magnet Brushless DC Motor for a 2-Wheeler Electric Vehicle Application | |
JPH09261901A (ja) | 永久磁石回転電機及びそれを用いた電動車両 | |
CN204517611U (zh) | 一种极爪式混合励磁电机 | |
CN109347292B (zh) | 一种无人机用无铁芯盘式电机 | |
JPS6041822Y2 (ja) | 同期機 | |
CN221103080U (zh) | 电机转子结构及双定子单转子盘式电机 | |
CN114221482B (zh) | 一种五自由度悬浮支承的车载储能装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21933673 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180090192.8 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021933673 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2021933673 Country of ref document: EP Effective date: 20230927 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |