CN114257059A - Electric machine - Google Patents
Electric machine Download PDFInfo
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- CN114257059A CN114257059A CN202111635027.4A CN202111635027A CN114257059A CN 114257059 A CN114257059 A CN 114257059A CN 202111635027 A CN202111635027 A CN 202111635027A CN 114257059 A CN114257059 A CN 114257059A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/102—Magnetic gearings, i.e. assembly of gears, linear or rotary, by which motion is magnetically transferred without physical contact
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/108—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with an axial air gap
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention belongs to the technical field of driving equipment, and particularly relates to a motor. The motor includes: the motor comprises a motor shell, a motor shaft, a motor stator, a motor rotor and a magnetic gear low-speed rotor; the motor shaft, the motor stator, the motor rotor and the magnetic gear low-speed rotor are all arranged in the motor shell; the motor stator, the motor rotor and the magnetic gear low-speed rotor are arranged along the axial direction of the motor shaft and sleeved on the motor shaft, and the motor rotor is positioned between the motor stator and the magnetic gear low-speed rotor. The motor has high power and torque density.
Description
Technical Field
The application belongs to the technical field of driving equipment, and particularly relates to a motor.
Background
The magnetic gear has the advantages of low noise, high efficiency, convenient maintenance, high reliability and the like, can be used for replacing a mechanical gear, and can realize low-speed and high-torque operation in a direct drive system, so that the magnetic gear compound motor technology is generally concerned in recent years.
The magnetic gear compound motor combines a motor and a concentric magnetic gear together by adopting a groove type structure, the motor and the magnetic gear are in a radial magnetic flux structure, but the torque and the power density of the motor are low.
Disclosure of Invention
In order to solve the technical problems, the invention provides a motor, which aims to solve the technical problems of low motor torque and low power density of a magnetic gear compound motor at least to a certain extent.
The technical scheme of the invention is as follows:
an electric machine, characterized by comprising: the motor comprises a motor shell, a motor shaft, a motor stator, a motor rotor and a magnetic gear low-speed rotor; the motor shaft, the motor stator, the motor rotor and the magnetic gear low-speed rotor are all arranged in the motor shell; the motor stator, the motor rotor and the magnetic gear low-speed rotor are arranged along the axial direction of the motor shaft and sleeved on the motor shaft, and the motor rotor is positioned between the motor stator and the magnetic gear low-speed rotor.
The motor shaft, the motor stator, the motor rotor and the magnetic gear low-speed rotor are all arranged in the motor shell, so that the motor stator is conducted to generate a rotating magnetic field, the motor rotor rotates, the motor rotor drives the magnetic gear low-speed rotor to generate low-speed large torque to drive external equipment to act, the motor stator and the motor rotor can form a motor magnetic flux closed path, and the motor rotor, the magnetic gear low-speed rotor and the motor shell form the magnetic gear magnetic flux closed path towards the end face of the magnetic gear low-speed rotor, so that the motor rotor can also be used as the magnetic gear high-speed rotor and the magnetic gear low-speed rotor can also be used as a magnetic gear magnetic adjusting ring without independently arranging the magnetic gear high-speed rotor and the magnetic gear magnetic adjusting ring, the cost is saved, the space is saved, the arrangement is convenient, and because the motor stator, the motor rotor and the magnetic gear low-speed rotor are arranged along the axial direction of the motor shaft, and the cover is located on the motor shaft, motor rotor is located between motor stator and the low-speed rotor of magnetic gear, so, can set up the magnet steel on motor rotor and the low-speed rotor of magnetic gear, form the axial magnetic flux structure, when being applied to flat space or application scene, compare in setting up the magnet steel on motor rotor and magnetic gear global, this application can set up more number of poles, under the equal size condition, the power and the torque density of this application are high, and under the demand of the same power and torque density, the small size of this application, low in weight, and, can be according to the performance requirement of motor, adjust the number of poles of motor rotor and the low-speed rotor of magnetic gear of this application, make the number of poles of motor rotor and the low-speed rotor of magnetic gear different, power and torque density are high, guarantee that the performance of motor can obtain abundant performance.
In some embodiments, the electric machine further comprises: and the output shaft is connected with the low-speed rotor of the magnetic gear and rotatably penetrates through the motor shell.
When the magnetic gear low-speed rotor rotates, the magnetic gear low-speed rotor drives the output shaft to rotate at the motor shell, and then the output shaft transmits low-speed large torque generated by the magnetic gear low-speed rotor to external equipment so as to drive the external equipment to act.
In some embodiments, a receiving cavity is formed in the output shaft, and the end of the motor shaft is rotatably disposed in the receiving cavity.
The motor shaft may be supported by the receiving cavity to receive an end of the motor shaft.
In some embodiments, the electric machine stator comprises: the coil holder is arranged in the motor shell and sleeved on the motor shaft; and the stator cores are arranged in the wire frame, and each stator core is provided with a winding.
The stator core is supported by the wire frame, the winding is supported by the stator core, and the winding is conducted to generate a rotating magnetic field, so that the motor rotor can be driven to rotate.
In some embodiments, the radial cross-sectional shape of the stator core is an isosceles trapezoid, and the axial cross-sectional shape of the stator core is an i-shaped shape, so that the arrangement is convenient, the preparation cost of the stator core can be reduced, and the manufacturing is convenient.
In some embodiments, the motor rotor is of a magnetic gathering spoke structure, and the magnetic gathering effect can be improved.
In some embodiments, the electric machine rotor comprises: the rotor core is connected with the motor shaft, and a plurality of first mounting grooves are formed in the axial end face of the rotor core; a plurality of first magnet steels are respectively arranged in the corresponding first mounting grooves and are magnetized in the radial direction, and the polarities of every two adjacent first magnet steels are opposite.
The rotating magnetic field generated by the motor stator can act on the first magnetic steel to drive the rotor core to act, and the magnetic field generated by the first magnetic steel can also act on the magnetic gear low-speed rotor to drive the magnetic gear low-speed rotor to rotate.
In some embodiments, the electric machine rotor further comprises: the protective sleeve is sleeved on the periphery of the rotor core to protect the periphery of the rotor core and avoid damage to the rotor core.
In some embodiments, the magnetic geared low speed rotor comprises: the magnetic gear low-speed rotor core is sleeved on the motor shaft, and a plurality of second mounting grooves are formed in the axial end face of the magnetic gear low-speed rotor core; and the plurality of magnetic adjusting ring cores are respectively arranged in the corresponding second mounting grooves.
The magnetic field generated by the motor rotor can act on the magnetic gear low-speed rotor core through the magnetic adjusting ring core so as to drive the magnetic gear low-speed rotor core to rotate, and meanwhile, the magnetic adjusting can be realized, the magnetic gear magnetic adjusting ring does not need to be arranged independently, the cost is saved, the space is saved, and the arrangement is convenient.
In some embodiments, the magnetic geared low speed rotor further comprises: and the magnetic adjusting ring bushing is sleeved on the circumferential surface of the low-speed rotor core of the magnetic gear so as to protect the circumferential surface of the low-speed rotor core of the magnetic gear and avoid the damage of the low-speed rotor core of the magnetic gear.
In some embodiments, the motor casing comprises: a housing; magnetic gear fixing base includes: the flange end cover and a plurality of second magnetic steels; the flange end cover is covered on the end face of the shell to form a space for accommodating the motor shaft, the motor stator, the motor rotor and the magnetic gear low-speed rotor; the second magnetic steels are attached to the end face, facing the magnetic gear low-speed rotor, of the flange end cover, the second magnetic steels are axially magnetized, and the polarities of every two adjacent second magnetic steels are opposite.
The magnetic field generated by the second magnetic steels can act on the magnetic adjusting ring core of the low-speed rotor of the magnetic gear, so that the low-speed rotor core of the magnetic gear of the low-speed rotor of the magnetic gear can generate low-speed large torque.
In some embodiments, a plurality of positioning pieces are arranged on the end face, facing the magnetic gear low-speed rotor, of the flange end cover, positioning grooves are formed in the second magnetic steel, and the positioning pieces can be embedded in the positioning grooves, so that positioning is facilitated, and installation accuracy is guaranteed.
In some embodiments, a groove is formed in an end of the housing facing away from the magnetic gear fixing seat, an end of the motor shaft facing away from the magnetic gear low-speed rotor is rotatably arranged in the groove, and the motor shaft is supported by the housing so that the motor shaft can support the motor rotor.
In some embodiments, a first limiting member is disposed on a circumferential surface of the end portion of the housing facing the flange end cover, a second limiting member is disposed on a circumferential surface of the flange end cover, and the first limiting member and the second limiting member are in contact with each other to determine a position between the housing and the magnetic gear fixing seat.
In some embodiments, the number of pole pairs of the first magnetic steel of the motor rotor is 4 or 5, and the number of pole pairs of the magnetic adjusting ring core of the magnetic gear low-speed rotor is the sum of the number of pole pairs of the first magnetic steel and the number of pole pairs of the second magnetic steel of the housing, so that a transmission ratio can be defined, and the motor rotor and the magnetic gear low-speed rotor can realize the effect of a speed reducer.
The beneficial effects of the invention at least comprise:
in the process of researching a magnetic gear composite motor, the motor and the concentric magnetic gear are combined together in a groove mode, and magnetic steel of the motor and the concentric magnetic gear are arranged on the peripheral surface, so the length-diameter ratio of the motor is limited by space, and meanwhile, in order to avoid magnetic circuit interference, the number of pole pairs of an outer rotor of the motor needs to be the same as the number of pole pairs of an inner rotor of the gear at a high speed, so the performance of the motor cannot be greatly exerted, and the torque density and the power of the motor are low.
Based on this, the motor shaft, motor stator, motor rotor and magnetism gear low-speed rotor all locate in the motor casing, so, switch on to motor stator and produce the rotating magnetic field, motor rotor rotates, motor rotor drives magnetism gear low-speed rotor and produces low-speed big torque, in order to drive external equipment action, motor stator and motor rotor can form motor magnetic flow closed path, motor rotor, magnetism gear low-speed rotor and motor casing form magnetism gear magnetic flow closed path towards the terminal surface of magnetism gear low-speed rotor, therefore, motor rotor also can regard as magnetism gear high-speed rotor, magnetism gear low-speed rotor also can regard as magnetism gear magnetic ring, do not need alone to set up magnetism gear high-speed rotor and magnetism gear magnetic ring again, and cost is saved, and the space is saved, and the arrangement is convenient.
In addition, because the motor stator, the motor rotor and the low-speed rotor of the magnetic gear are arranged along the axial direction of the motor shaft and are sleeved on the motor shaft, and the motor rotor is positioned between the motor stator and the low-speed rotor of the magnetic gear, the magnetic steel can be arranged on the motor rotor and the low-speed rotor of the magnetic gear to form an axial magnetic flux structure, when the motor rotor is applied to a horizontal space or an application scene, compared with the case that the magnetic steel is arranged on the circumferential surface of the motor rotor and the magnetic gear, the motor rotor and the magnetic gear can be provided with more pole pairs, under the condition of the same size, the power and the torque density of the motor rotor and the magnetic gear are high, and under the requirement of the same power and torque density, the motor rotor and the magnetic gear have small volume and low weight, and can be adjusted according to the performance requirement of the motor to ensure that the pole pairs of the motor rotor and the low-speed rotor of the magnetic gear are different, the power and the torque density are high, and the performance of the motor can be fully exerted.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a motor of the present embodiment;
FIG. 2 is an exploded view of the motor of FIG. 1;
FIG. 3 is a schematic view of a stator structure of the motor shown in FIG. 1;
FIG. 4 is a schematic view of a rotor of the motor of FIG. 1;
FIG. 5 is a schematic view of a magnetic geared low speed rotor of the motor of FIG. 1;
fig. 6 is a schematic structural view of a magnetic gear fixing seat of the motor in fig. 1.
In the drawings:
the magnetic gear fixing base 102 is arranged on the motor shell 10, the shell 101, the flange end cover 1021, a plurality of second magnetic steels 1022, a fourth through hole 1023, a positioning groove 1024, a fourth bearing 103, a first limiting piece 104 and a second limiting piece 105;
a motor shaft 20;
the motor stator 30, a bobbin 301, a plurality of stator cores 302, a first through hole 303, and a winding 304;
the motor comprises a motor rotor 40, a rotor core 401, a plurality of first magnetic steels 402 and a protective sleeve 403;
the magnetic gear low-speed rotor comprises a magnetic gear low-speed rotor 50, a magnetic gear low-speed rotor core 501, a plurality of magnetic adjusting ring cores 502, a third through hole 503, a third bearing 504 and a magnetic adjusting ring bushing 505;
the output shaft 60, the first bearing 601, the accommodating cavity 602 and the second bearing 603.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The application is described below with reference to specific embodiments in conjunction with the following drawings:
the motor provided by the embodiment aims to solve the technical problems of low motor torque and low power density of the magnetic gear compound motor at least to a certain extent.
Fig. 1 is a schematic structural view of the motor of the present embodiment, and fig. 2 is an exploded view of the motor of fig. 1. Referring to fig. 1 and 2, the motor of the present embodiment includes: motor housing 10, motor shaft 20, motor stator 30, motor rotor 40 and magnetic geared low speed rotor 50. The motor shaft 20, the motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50 are all arranged in the motor casing 10. The motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50 are axially arranged along the motor shaft 20 and sleeved on the motor shaft 20, and the motor rotor 40 is located between the motor stator 30 and the magnetic gear low-speed rotor 50.
In some embodiments, the motor shaft 20, the motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50 are all disposed in the motor housing 10, so that the motor stator 30 is conducted to generate a rotating magnetic field, the motor rotor 40 rotates, the motor rotor 40 drives the magnetic gear low-speed rotor 50 to generate a low-speed large torque to drive an external device to operate, the motor stator 30 and the motor rotor 40 can form a motor flux closed path, and the motor rotor 40, the magnetic gear low-speed rotor 50 and the motor housing 10 form a magnetic gear flux closed path towards an end face of the magnetic gear low-speed rotor 50, so that the motor rotor 40 can also serve as a magnetic gear high-speed rotor, the magnetic gear low-speed rotor 50 can also serve as a magnetic gear magnetic modulating ring, and the magnetic gear high-speed rotor and the magnetic gear magnetic modulating ring do not need to be separately disposed, thereby saving cost, saving space and facilitating arrangement, because the motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50 are axially arranged along the motor shaft 20 and sleeved on the motor shaft 20, and the motor rotor 40 is positioned between the motor stator 30 and the magnetic gear low-speed rotor 50, magnetic steel can be arranged on the motor rotor 40 and the magnetic gear low-speed rotor 50 to form an axial magnetic flux structure, when the magnetic motor is applied to a horizontal space or an application scene, compared with the magnetic steel arranged on the peripheral surface of the motor rotor 40 and the magnetic gear, the magnetic motor can be provided with more pole pairs, under the condition of the same size, the power and torque density of the magnetic motor are high, and under the requirement of the same power and torque density, the magnetic motor is small in size and low in weight, and the pole pairs of the motor rotor 40 and the magnetic gear low-speed rotor 50 of the magnetic motor can be adjusted according to the performance requirement of the magnetic motor, so that the pole pairs of the motor rotor 40 and the magnetic gear low-speed rotor 50 are different, the power and the torque density are high, and the performance of the motor can be fully exerted.
In some embodiments, the motor shaft 20 is connected to the motor rotor 40 to support the motor rotor 40 to smoothly rotate in the motor housing 10. The motor shaft 20 is not connected to the motor stator 30, that is: a gap is formed between the motor shaft 20 and the motor stator 30 to prevent the motor stator 30 from interfering with the operation of the motor shaft 20. The motor shaft 20 is rotatably installed in the magnetic gear low-speed rotor 50, and the actions of the two do not interfere with each other.
In some embodiments, the motor shaft 20, the motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50 are coaxial, so that smooth power output is ensured.
Fig. 5 is a schematic structural view of a magnetic gear low-speed rotor of the motor in fig. 1. With reference to fig. 1, 2 and 5, in some embodiments, to facilitate the low-speed high torque output generated by the magnetic gear low-speed rotor 50, the motor further includes: an output shaft 60. The output shaft 60 is connected to the magnetic gear low-speed rotor 50. Namely: the output shaft 60 is disposed on an end surface of the magnetic gear low-speed rotor 50 facing away from the motor rotor 40, and rotatably penetrates the motor housing 10. In the present embodiment, the first bearing 601 is provided between the output shaft 60 and the motor case 10, and the output shaft 60 can smoothly rotate at the motor case 10 by the first bearing 601, so that the low-speed high torque generated by the magnetic gear low-speed rotor 50 can be transmitted to the external device.
In some embodiments, when the magnetic gear low-speed rotor 50 rotates, the magnetic gear low-speed rotor 50 drives the output shaft 60 to rotate at the motor casing 10, and then the output shaft 60 transmits the low-speed high torque generated by the magnetic gear low-speed rotor 50 to the external device to drive the external device to act.
With reference to fig. 1, in some embodiments, in order to support the motor shaft 20, a receiving cavity 602 is formed in the output shaft 60, and an end of the motor shaft 20 is rotatably disposed in the receiving cavity 602, that is: the end of the motor shaft 20 facing away from the motor stator 30 is rotatably disposed in the accommodating chamber 602, and the end of the motor shaft 20 is accommodated in the accommodating chamber 602 to support the motor shaft 20. In this embodiment, the end of the motor shaft 20 departing from the motor stator 30 can be disposed in the accommodating cavity 602 through the second bearing 603, so as to ensure that the motor shaft 20 can rotate smoothly, and at the same time, the rotation of the motor shaft 20 and the rotation of the output shaft 60 do not interfere with each other, thereby ensuring the normal operation of the device.
Fig. 3 is a schematic structural view of a motor stator of the motor in fig. 1. In conjunction with fig. 3, in some embodiments, the motor stator 30 includes: a bobbin 301 and a plurality of stator cores 302. The wire frame 301 is disposed in the motor housing 10 and sleeved on the motor shaft 20, the wire frame 301 is protected by the motor housing 10, the middle of the wire frame 301 is provided with a first through hole 303 for the motor shaft 20 to pass through, and meanwhile, the diameter of the first through hole 303 is larger than that of the motor shaft 20, so as to prevent the wire frame 301 from interfering with the rotation of the motor shaft 20, so that the motor shaft 20 normally rotates, and the motor rotor 40 normally rotates. The plurality of stator cores 302 are arranged in the bobbin 301, the stator cores 302 are supported by the bobbin 301, and meanwhile, the plurality of stator cores 302 are arranged in the bobbin 301 at equal angles and uniform intervals to ensure that the arrangement meets the requirements. Each stator core 302 is provided with a winding 304, and the winding 304 is supported by the stator core 302 and conducted to generate a rotating magnetic field, so as to drive the motor rotor 40 to rotate.
Referring to fig. 3, in some embodiments, for convenience of arrangement, the radial cross-sectional shape of the stator core 302 is an isosceles trapezoid, and the axial cross-sectional shape of the stator core 302 is an i-shape, so that the manufacturing cost of the stator core 302 can be reduced, and the stator core can be manufactured conveniently.
Fig. 4 is a schematic structural view of a motor rotor of the motor in fig. 1. In some embodiments, in conjunction with fig. 4, to enhance the flux concentration effect, the motor rotor 40 is a flux concentrating spoke structure.
In conjunction with fig. 4, in some embodiments, the motor rotor 40 includes: a rotor core 401 and a plurality of first magnetic steels 402. The rotor core 401 is disposed in the motor housing 10 and connected to the motor shaft 20, and protects the rotor core 401 through the motor housing 10 while supporting the rotor core 401 through the motor shaft 20. In this embodiment, a second through hole is formed in the middle of the rotor core 401, and the motor shaft 20 is embedded in the second through hole, so that the rotor core 401 and the motor shaft 20 are fixedly connected. A plurality of first mounting grooves have been seted up on rotor core 401's the axial terminal surface, and a plurality of first magnet steel 402 are located in the corresponding first mounting groove respectively, and for radially magnetizing, and the polarity of per two adjacent first magnet steel 402 is opposite, can reduce first magnet steel 402's volume, can arrange more first magnet steel 402, and power and torque density are high.
In some embodiments, the first mounting groove is a through groove, the first magnetic steel 402 is embedded in the first mounting groove, so that the rotating magnetic field generated by the motor stator 30 can act on the first magnetic steel 402 to drive the rotor core 401 to act, and the magnetic field generated by the first magnetic steel 402 can also act on the magnetic gear low-speed rotor 50 to drive the magnetic gear low-speed rotor 50 to rotate, therefore, the motor rotor 40 can also serve as a magnetic gear high-speed rotor, and the magnetic gear high-speed rotor does not need to be separately arranged, thereby saving cost, saving space, and facilitating arrangement.
In some embodiments, to protect rotor core 401, electric machine rotor 40 further includes: a protective sheath 403. The protective sleeve 403 is sleeved on the circumferential surface of the rotor core 401 to protect the circumferential surface of the rotor core 401 and prevent the rotor core 401 from being damaged.
In some embodiments, the protective sleeve 403 is made of a non-magnetic material, so as to prevent an external magnetic field from interfering with the operation of the motor rotor 40, and simultaneously, prevent the magnetic field generated by the motor rotor 40 from leaking, and ensure power and torque density. The non-magnetic material can be metals and alloys other than iron, cobalt and nickel and alloys thereof, such as: copper, aluminum alloys, and the like. From the viewpoint of cost reduction, the material of the protective sheath 403 is preferably an aluminum alloy.
Fig. 5 is a schematic structural view of a magnetic gear low-speed rotor of the motor in fig. 1. Referring to fig. 5, in some embodiments, the magnetic geared low speed rotor 50 includes: a magnetic gear low-speed rotor core 501 and a plurality of magnetic adjusting ring cores 502. Magnetic gear low-speed rotor core 501 is located in motor casing 10 to on motor shaft 20 is located to the cover, output shaft 60 locates on the terminal surface that magnetic gear low-speed rotor core 501 deviates from motor rotor 40, and output shaft 60 wears to locate motor casing 10 rotatablely, so, magnetic gear low-speed rotor core 501 can be supported by motor casing 10, simultaneously, also can be smooth and easy at the internal rotation of motor casing 10. Third through hole 503 has been seted up at the middle part of magnetic gear low-speed rotor core 501 to make motor shaft 20 pass, and be equipped with third bearing 504 in the third through hole 503, motor shaft 20 can smoothly rotate at magnetic gear low-speed rotor core 501 through third bearing 504, and, magnetic gear low-speed rotor core 501's rotation and motor shaft 20's rotation, mutual noninterference, guarantee equipment normal operating, and simultaneously, magnetic gear low-speed rotor core 501 can also support motor shaft 20, guarantee motor shaft 20 pivoted stability.
In some embodiments, a plurality of second mounting grooves have been seted up on the axial terminal surface of magnetic gear low-speed rotor core 501, a plurality of magnetic ring cores 502 of transferring are located in corresponding second mounting groove respectively, not only can make the magnetic field that electric motor rotor 40 produced act on magnetic gear low-speed rotor core 501 through transferring magnetic ring core 502, in order to drive magnetic gear low-speed rotor core 502 and rotate, and simultaneously, can also realize transferring magnetism, need not set up magnetic gear alone again and transfer the magnetic ring, and therefore, the cost is saved, the space is saved, and the arrangement is convenient.
With reference to fig. 5, in some embodiments, the second mounting groove is a through groove, the magnetic adjusting ring core 502 is embedded in the first mounting groove, so that the magnetic field generated by the motor rotor 20 can act on the magnetic adjusting ring core 502 to drive the magnetic gear low-speed rotor core 501 to act, the end surface of the motor casing 10 facing the magnetic gear low-speed rotor 50 is provided with a plurality of second magnetic steels 1022, the plurality of second magnetic steels 1022 are axially magnetized, and the polarities of every two adjacent second magnetic steels 1022 are opposite to each other to generate a magnetic field, and act on the magnetic adjusting ring core 502 at the same time, so that the magnetic gear low-speed rotor core 501 generates a low-speed large torque.
Referring to fig. 5, in some embodiments, to protect the magnetic gear low-speed rotor core 501, the magnetic gear low-speed rotor 50 further includes: the magnetic tuning ring bushing 505. The magnetic adjusting ring bushing 505 is sleeved on the circumferential surface of the magnetic gear low-speed rotor core 501 to protect the circumferential surface of the magnetic gear low-speed rotor core 501 and prevent the magnetic gear low-speed rotor core 501 from being damaged.
In some embodiments, the magnetic ring bushing 505 is made of a non-magnetic material, so as to prevent an external magnetic field from interfering with the operation of the magnetic gear low-speed rotor 50, and to prevent the magnetic field generated by the magnetic gear low-speed rotor 50 from leaking, thereby ensuring power and torque density. The non-magnetic material can be metals and alloys other than iron, cobalt and nickel and alloys thereof, such as: copper, aluminum alloys, and the like. From the viewpoint of cost reduction, the material of the shim sleeve 505 is preferably an aluminum alloy.
With reference to fig. 5, in some embodiments, for convenience of arrangement, the radial cross-sectional shape of the magnetic tuning ring core 502 is a sector, and at the same time, the manufacturing cost of the magnetic tuning ring core 502 can be reduced, which is convenient for manufacturing.
Fig. 6 is a schematic structural view of a magnetic gear fixing seat of the motor in fig. 1. In conjunction with fig. 1, 2 and 6, in some embodiments, the motor casing 10 includes: a housing 101 and a magnetic gear holder 102. The magnetic gear fixing base 102 includes: flange end cover 1021 and a plurality of second magnetic steels 1022. The flange end cover 1021 covers the end face of the casing 101 to form a space for accommodating the motor shaft 20, the motor stator 30, the motor rotor 40 and the magnetic gear low-speed rotor 50, so that the casing 101 is closed, impurities are prevented from entering the motor casing 10, and safety of equipment inside the motor casing 10 is guaranteed. Wherein, fourth through-hole 1023 has been seted up at the middle part of flange end cover 1021, is equipped with first bearing 601 in third through-hole 1023, makes output shaft 60 can smoothly rotate in flange end cover 1021 through first bearing 601, can transmit the big torque transmission of low-speed that magnetism gear low-speed rotor 50 produced for external equipment.
With reference to fig. 6, in some embodiments, a plurality of second magnetic steels 1022 are attached to the end surface of the flange end cover facing the magnetic gear low-speed rotor 50, and are axially magnetized, and the polarities of every two adjacent second magnetic steels 1022 are opposite, so that the volume of the second magnetic steels 1022 can be reduced, more second magnetic steels 1022 can be arranged, and the power and torque density is high. Meanwhile, the magnetic field generated by the second magnetic steels 1022 can act on the magnetic adjusting ring core 502 of the magnetic gear low-speed rotor 50, so that the magnetic gear low-speed rotor core 501 of the magnetic gear low-speed rotor 50 generates a low-speed large torque.
In some embodiments, when energized, the driver turns on the windings 304 of the motor stator 30 in a phase sequence to generate a rotating magnetic field, which drives the motor rotor 40 to rotate, thereby driving the magnetic gear low-speed rotor 50 to rotate with a low-speed and high-torque, and transmitting the low-speed and high-torque to the output shaft 60. Specifically, the motor flux closed path is: any first magnetic steel 402 in the motor rotor 40 → the rotor core 401 → the air gap between the motor stator 30 and the motor rotor 40 → the stator core 302 and the winding 304 → the motor stator 30 and the motor rotor 40 to the adjacent first magnetic steel 402 with opposite magnetizing directions → the rotor core 401 → any first magnetic steel 402 in the motor rotor 40. The magnetic gear magnetic flux closed path is as follows: any first magnetic steel 402 in the motor rotor 40 → the rotor core 401 → the air gap between the motor rotor 40 and the magnetic gear low-speed rotor 50 → the flux adjusting ring core 502 → the air gap between the magnetic gear low-speed rotor 50 and the magnetic gear base 102 → the second magnetic steel 1022 → the flange end cover 1021 of the magnetic gear base 102 → the adjacent second magnetic steel 1022 with the opposite magnetizing direction → the air gap between the magnetic gear low-speed rotor 50 and the magnetic gear base 102 → the adjacent flux adjusting ring core 502 → the air gap between the motor rotor 40 and the magnetic gear low-speed rotor 50 → the rotor core 401 → any first magnetic steel 402 in the motor rotor 40.
With reference to fig. 6, in some embodiments, in order to facilitate installation of the second magnetic steel 1022 to the flange end cover 1021, the flange end cover 1021 is provided with a plurality of positioning members on the end surface of the magnetic gear low-speed rotor 50, the positioning groove 1024 is formed in the second magnetic steel 1022, the positioning members can be embedded in the positioning groove 1024, and through positioning of the positioning members and the positioning groove 1024, the second magnetic steel 1022 can be installed to the flange end cover 1021 quickly, so that the installation efficiency is improved, and meanwhile, the installation accuracy is also ensured.
In some embodiments, the positioning element may be a semicircular protrusion, the positioning groove 1024 may be a semicircular groove, the diameter of the semicircular protrusion matches the diameter of the semicircular groove, and the semicircular protrusion may be embedded in the semicircular groove, so as to facilitate positioning and ensure installation accuracy.
Referring to fig. 6, in some embodiments, the positioning elements are disposed on the flange end cover 1021 at equal angular intervals, and the positioning slots 1024 are disposed on the circumferential surface of the second magnetic steel 1022, so as to position the second magnetic steel 1022 conveniently.
Referring to fig. 1, in some embodiments, the end of the housing 101 facing away from the magnetic gear fixing base 102 is provided with a groove, the end of the motor shaft 20 facing away from the magnetic gear low-speed rotor 50 is rotatably disposed in the groove, and the motor shaft 20 is supported by the housing 101, so that the motor shaft 20 can support the motor rotor 40. In the present embodiment, a fifth through hole is opened at the groove, a fourth bearing 103 is disposed in the fifth through hole, and the motor shaft 20 can smoothly rotate at the housing 101 through the fourth bearing 103, so as to support the motor rotor 40 and avoid interference with the rotation of the motor rotor 40.
With reference to fig. 1, 2 and 6, in some embodiments, a first limiting member 104 is disposed on a circumferential surface of an end portion of the housing 101 facing the flange end cover 1021, a second limiting member 105 is disposed on a circumferential surface of the flange end cover 1021, the first limiting member 104 abuts against the second limiting member 105 to determine a position between the housing 101 and the magnetic gear fixing seat 102, and meanwhile, threaded holes may be formed in the first limiting member 104 and the second limiting member 105 to facilitate connection between the housing 101 and the magnetic gear fixing seat 102. In the present embodiment, the cross-sectional shapes of the first limiting member 104 and the second limiting member 105 are both annular, so as to facilitate the connection between the first limiting member 104 and the second limiting member 105.
In some embodiments, the number of pole pairs of the first magnetic steel 402 of the motor rotor 40 is 4 or 5, and the number of pole pairs of the magnetic adjusting ring core 502 of the magnetic gear low-speed rotor 50 is the sum of the number of pole pairs of the first magnetic steel 402 and the number of pole pairs of the second magnetic steel 1022 of the housing 101, which may define a transmission ratio, so that the motor rotor 40 and the magnetic gear low-speed rotor 50 realize the function of a speed reducer.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (15)
1. An electric machine, comprising: the motor comprises a motor shell (10), a motor shaft (20), a motor stator (30), a motor rotor (40) and a magnetic gear low-speed rotor (50);
the motor shaft (20), the motor stator (30), the motor rotor (40) and the magnetic gear low-speed rotor (50) are all arranged in the motor shell (10);
the motor stator (30), the motor rotor (40) and the magnetic gear low-speed rotor (50) are arranged along the axial direction of the motor shaft (20) and sleeved on the motor shaft (20), and the motor rotor (40) is located between the motor stator (30) and the magnetic gear low-speed rotor (50).
2. The electric machine of claim 1, further comprising: and the output shaft (60) is connected with the magnetic gear low-speed rotor (50) and rotatably penetrates through the motor shell (10).
3. The electric machine of claim 2, wherein: an accommodating cavity is formed in the output shaft (60), and the end part of the motor shaft (20) is rotatably arranged in the accommodating cavity.
4. The electrical machine according to any of claims 1-2, wherein the electrical machine stator (30) comprises:
the wire frame (301) is arranged in the motor shell (10) and sleeved on the motor shaft (20);
the stator cores (302) are arranged in the bobbin (301), and each stator core (302) is provided with a winding (304).
5. The electric machine of claim 4, wherein: the radial cross section of the stator core (302) is in an isosceles trapezoid shape, and the axial cross section of the stator core (302) is in an I shape.
6. The electric machine according to any of claims 1-2, characterized in that: the motor rotor (40) is of a magnetic gathering type spoke structure.
7. The electrical machine according to any of claims 1-2, wherein the electrical machine rotor (40) comprises:
the rotor core (401) is connected with the motor shaft (20), and a plurality of first mounting grooves are formed in the axial end face of the rotor core (401);
the first magnetic steels (402) are respectively arranged in the corresponding first mounting grooves and are magnetized in the radial direction, and the polarities of every two adjacent first magnetic steels (402) are opposite.
8. The electric machine according to claim 7, characterized in that the electric machine rotor (40) further comprises: and a protective sleeve (403) which is sleeved on the circumferential surface of the rotor core (401).
9. The electrical machine according to any of claims 1-2, wherein the magnetic geared low speed rotor (50) comprises:
the magnetic gear low-speed rotor core (501) is sleeved on the motor shaft (20), and a plurality of second mounting grooves are formed in the axial end face of the magnetic gear low-speed rotor core (501);
and the magnetic adjusting ring cores (502) are respectively arranged in the corresponding second mounting grooves.
10. The electric machine of claim 9, wherein the magnetic geared low speed rotor (50) further comprises: and the magnetic adjusting ring bushing (505) is sleeved on the circumferential surface of the magnetic gear low-speed rotor core (501).
11. The electrical machine according to any of claims 1-2, characterized in that the motor casing (10) comprises:
a housing (101);
magnetic gear mount (102) comprising: the flange end cover (1021) and a plurality of second magnetic steels (1022); the flange end cover (1021) is arranged on the end face of the shell (101) in a covering mode to form a space for accommodating the motor shaft (20), the motor stator (30), the motor rotor (40) and the magnetic gear low-speed rotor (50); the second magnetic steels (1022) are attached to the end face, facing the magnetic gear low-speed rotor (50), of the flange end cover (1021), are axially magnetized, and the polarities of every two adjacent second magnetic steels (1022) are opposite.
12. The electric machine of claim 11, wherein: the flange end cover (1021) is provided with a plurality of positioning pieces on the end face facing the magnetic gear low-speed rotor (50), the second magnetic steel (1022) is provided with a positioning groove (1024), and the positioning pieces can be embedded in the positioning groove (1024).
13. The electric machine of claim 11, wherein: the end part of the shell (101) departing from the magnetic gear fixing seat (102) is provided with a groove, and the end part of the motor shaft (20) far away from the magnetic gear low-speed rotor (50) is rotatably arranged in the groove.
14. The electric machine of claim 11, wherein: the flange end cover is characterized in that a first limiting part (104) is arranged on the circumferential surface of the end part, facing the flange end cover (1021), of the shell (101), a second limiting part (105) is arranged on the circumferential surface of the flange end cover (1021), and the first limiting part (104) is abutted to the second limiting part (105).
15. The electric machine according to any of claims 1-2, characterized in that: the number of pole pairs of a first magnetic steel (402) of the motor rotor (40) is 4 or 5, and the number of pole pairs of a magnetic adjusting ring core (502) of the magnetic gear low-speed rotor (50) is the sum of the number of pole pairs of the first magnetic steel (402) and the number of pole pairs of a second magnetic steel (1022) of the shell (101).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111635027.4A CN114257059A (en) | 2021-12-29 | 2021-12-29 | Electric machine |
| PCT/CN2022/141838 WO2023125383A1 (en) | 2021-12-29 | 2022-12-26 | Electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111635027.4A CN114257059A (en) | 2021-12-29 | 2021-12-29 | Electric machine |
Publications (1)
| Publication Number | Publication Date |
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| CN114257059A true CN114257059A (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111635027.4A Pending CN114257059A (en) | 2021-12-29 | 2021-12-29 | Electric machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114257059A (en) |
| WO (1) | WO2023125383A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023125383A1 (en) * | 2021-12-29 | 2023-07-06 | 广东美的白色家电技术创新中心有限公司 | Electric motor |
| WO2024113284A1 (en) * | 2022-11-30 | 2024-06-06 | 深圳市大疆创新科技有限公司 | Electric motor, gimbal and mobile platform |
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| CN202851374U (en) * | 2012-10-12 | 2013-04-03 | 刘洋 | Axial type magnetic gear high-speed magnetic drive pump |
| US20140132099A1 (en) * | 2011-06-27 | 2014-05-15 | Hitachi, Ltd. | Magnetic Gear-Type Electric Rotating Machine |
| US20170104388A1 (en) * | 2015-10-09 | 2017-04-13 | The Texas A&M University System | Method and apparatus for compact axial flux magnetically geared machines |
| CN110048568A (en) * | 2019-03-07 | 2019-07-23 | 江苏大学 | A kind of outer rotor vernier motor for electric vehicle-magnetic gear compound machine |
| CN112467901A (en) * | 2020-11-12 | 2021-03-09 | 华中科技大学 | Magnetic gear composite direct drive motor and application thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013059178A (en) * | 2011-09-07 | 2013-03-28 | Mitsubishi Electric Corp | Magnetic gear |
| CN114257059A (en) * | 2021-12-29 | 2022-03-29 | 广东美的白色家电技术创新中心有限公司 | Electric machine |
-
2021
- 2021-12-29 CN CN202111635027.4A patent/CN114257059A/en active Pending
-
2022
- 2022-12-26 WO PCT/CN2022/141838 patent/WO2023125383A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140132099A1 (en) * | 2011-06-27 | 2014-05-15 | Hitachi, Ltd. | Magnetic Gear-Type Electric Rotating Machine |
| CN202851374U (en) * | 2012-10-12 | 2013-04-03 | 刘洋 | Axial type magnetic gear high-speed magnetic drive pump |
| US20170104388A1 (en) * | 2015-10-09 | 2017-04-13 | The Texas A&M University System | Method and apparatus for compact axial flux magnetically geared machines |
| CN110048568A (en) * | 2019-03-07 | 2019-07-23 | 江苏大学 | A kind of outer rotor vernier motor for electric vehicle-magnetic gear compound machine |
| CN112467901A (en) * | 2020-11-12 | 2021-03-09 | 华中科技大学 | Magnetic gear composite direct drive motor and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023125383A1 (en) * | 2021-12-29 | 2023-07-06 | 广东美的白色家电技术创新中心有限公司 | Electric motor |
| WO2024113284A1 (en) * | 2022-11-30 | 2024-06-06 | 深圳市大疆创新科技有限公司 | Electric motor, gimbal and mobile platform |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023125383A1 (en) | 2023-07-06 |
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