CN215772709U - Motor and motor rotor - Google Patents
Motor and motor rotor Download PDFInfo
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- CN215772709U CN215772709U CN202121202078.3U CN202121202078U CN215772709U CN 215772709 U CN215772709 U CN 215772709U CN 202121202078 U CN202121202078 U CN 202121202078U CN 215772709 U CN215772709 U CN 215772709U
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- iron core
- electric machine
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- cores
- magnetic
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- 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
- H02K21/02—Details
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a motor and a motor rotor, wherein the motor rotor comprises a rotating shaft, a first iron core, a plurality of iron core groups and first magnetic steel, and the first iron core is fixedly connected with the rotating shaft; the plurality of iron core groups are arranged along the circumferential direction of the first iron core, the iron core groups and the first iron core are separated along the radial direction of the motor rotor, each iron core group comprises at least one second iron core, and the second iron cores are fixedly connected with the first iron cores; the first magnetic steel is arranged between the first iron core and the iron core group. According to the motor rotor provided by the embodiment of the utility model, the magnetic leakage can be reduced, and the utilization rate is increased.
Description
Technical Field
The utility model relates to the technical field of power equipment, in particular to a motor rotor and a motor with the same.
Background
The synchronous reluctance permanent magnet motor rotor structure in the related art comprises magnetic steel, salient poles, punched sheet closed slots, magnetic steel slots, a motor rotor and a shell, wherein the punched sheet closed slots are formed in the inner side of the shell, the magnetic steel slots are formed between the punched sheet closed slots, the motor rotor is arranged in the shell, and magnetic steel is arranged in the motor rotor. The utility model discloses an electric motor rotor is put into with the magnet steel, has increased the salient pole in electric motor rotor's axle direction, and its effect is the difference of better increase d axle inductance and q axle inductance to more effectual improvement motor reluctance torque can make the power density of motor higher, and the volume reduction of motor, the startability is better, is fit for being extensively promoted and used.
The reluctance torque is improved to the greatest extent under the premise of the integrated motor rotor in the prior art, but each layer of magnetic steel is still connected by a magnetic isolation bridge, the magnetic isolation bridge inevitably causes the increase of magnetic leakage, and meanwhile, if the magnetic isolation bridge is designed to be too narrow, the structural strength of the motor rotor can be influenced.
SUMMERY OF THE UTILITY MODEL
One object of the present invention is to provide a motor rotor that can reduce magnetic leakage and increase utilization.
Another object of the utility model is to propose an electric machine comprising the aforementioned machine rotor.
The motor rotor comprises a rotating shaft, a first iron core, a plurality of iron core groups and first magnetic steel, wherein the first iron core is fixedly connected with the rotating shaft; the plurality of iron core groups are arranged along the circumferential direction of the first iron core, the iron core groups and the first iron core are separated along the radial direction of the motor rotor, each iron core group comprises at least one second iron core, and the second iron cores are fixedly connected with the first iron cores; the first magnetic steel is arranged between the first iron core and the iron core group.
According to the motor rotor provided by the embodiment of the utility model, the magnetic leakage can be reduced, and the utilization rate of the magnetic steel is increased.
In addition, the rotor of the motor according to the above embodiment of the present invention may further have the following additional technical features:
optionally, a containing groove is formed in the outer peripheral surface of the first iron core, and the iron core group is embedded into the containing groove.
Optionally, the recess includes first medial surface, second medial surface and connection face, first medial surface with the second medial surface connect respectively in the both sides of connecting the face, just first medial surface with the flaring shape has been constructed between the second medial surface, first medial surface connect the face and the second medial surface all with be equipped with between the iron core group first magnet steel.
Optionally, at least one of the opposite surfaces of the first iron core and the iron core set is provided with a first positioning slot for positioning the first magnetic steel.
Optionally, the iron core group includes at least two the second iron cores, the second iron core in the iron core group is followed the radial outside successive layer interval setting of pivot, every adjacent two be equipped with the second magnet steel between the second iron core.
Optionally, each adjacent two of the second cores, which is close to one of the first cores, includes: the first iron core is connected with the second branch part through the first connecting piece, the second branch part is connected with the third branch part through the second connecting piece, and the second iron core is connected with the third branch part through the second connecting piece.
Optionally, at least one of the opposite surfaces of two adjacent second iron cores is provided with a second positioning slot for positioning the second magnetic steel.
Optionally, a third magnetic steel is embedded in an outermost one of the second cores.
Optionally, the motor rotor further comprises a magnetic isolation plate, the magnetic isolation plate is fixedly connected to two ends of the rotating shaft, the first iron core and the second iron core are arranged between the magnetic isolation plates at two ends of the rotating shaft, and the second iron core is connected with the magnetic isolation plates.
Optionally, the motor rotor further includes a thermal sleeve ring, the thermal sleeve ring is sleeved on the rotating shaft, and the thermal sleeve ring is disposed on one side of the magnetic shield plate, which is far away from the first iron core, so as to limit the magnetic shield plate.
Optionally, a plurality of lightening holes are formed in the first iron core, and the plurality of lightening holes are arranged in a direction surrounding the rotating shaft.
An electric machine according to an embodiment of the utility model comprises an electric machine rotor according to the foregoing.
Drawings
Fig. 1 is an exploded view of a rotor of an electric machine in accordance with an embodiment of the present invention.
Fig. 2 is a schematic view of a rotor of an electric machine according to an embodiment of the utility model.
FIG. 3 is a partial cross-sectional view of a rotor of an electric machine in accordance with one embodiment of the utility model
Fig. 4 is an exploded view of a rotor of an electric machine in accordance with an embodiment of the present invention.
Fig. 5 is a partial schematic view of a rotor of an electric machine according to an embodiment of the utility model.
Reference numerals:
the magnetic shield structure comprises a motor rotor 100, a rotating shaft 1, a magnetic shield plate 2, a first iron core 3, an inner ring wheel hub 31, an outer ring wheel hub 32, a support rib 33, first magnetic steel 4, a second iron core 5, a first branch part 51, a second branch part 52, a third branch part 53, second magnetic steel 6, third magnetic steel 8, a connecting bolt 9, a heat shrink ring 10, a containing groove 101, a first connecting hole 102, a second connecting hole 103, a lightening hole 104, a first inner side surface 1031, a second inner side surface 1032 and a connecting surface 1033.
Detailed Description
In the related art, the iron cores for placing the magnetic steel on each layer need to be connected by a magnetic bridge, the existence of the magnetic bridge inevitably leads to the increase of magnetic leakage, and the structural strength of the motor rotor 100 can be influenced if the magnetic bridge is designed to be too narrow. This patent is creative with the iron core piecemeal, punch in the suitable position of every iron core, use the bolt to be connected above-mentioned hole and magnetic shield 2, just so can utilize the magnetic shield 2 at iron core both ends as the supporting component, magnetic bridge structure has been cancelled completely under the prerequisite of guaranteeing electric motor rotor 100 intensity, it is minimum to fall down magnet steel magnetic leakage coefficient, the utilization ratio of magnet steel has been improved, the salient pole rate of motor has been increased simultaneously, d axle and q axle inductance difference increase, the reluctance torque of motor has been increased, the power density of motor has been improved when the cost is reduced.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
As shown in fig. 1 to 5, an electric motor rotor 100 according to an embodiment of the present invention includes a rotating shaft 1, a first iron core 3, a plurality of iron core groups, and a first magnetic steel 4. First iron core 3 and 1 fixed connection of pivot, a plurality of iron core group set up along the circumference of first iron core 3, and iron core group and first iron core 3 radially separate along electric motor rotor 100, and iron core group includes at least one second iron core 5, second iron core 5 and 3 fixed connection of first iron core. First magnet steel 4 is arranged between first iron core 3 and the iron core group.
According to the motor rotor 100 provided by the embodiment of the utility model, the iron core is divided into a plurality of layers along the radial direction of the rotating shaft 1, namely the first iron core 3 and the second iron core 5 are arranged at intervals along the radial direction of the rotating shaft 1, so that a magnetic bridge structure is completely cancelled on the premise of ensuring the strength of the motor rotor 100, the magnetic leakage coefficient of the magnetic steel is reduced to the minimum, the utilization rate of the magnetic steel is improved, less magnetic steel can be used under the same condition, and the cost of the magnetic steel is saved. Meanwhile, the salient pole ratio of the motor is increased, the difference value of d-axis inductance and q-axis inductance is increased, the reluctance torque of the motor is increased, the cost is reduced, and the power density of the motor is improved.
Specifically, the first iron core 3 in the present invention may be sleeved outside the rotating shaft 1, and the first iron core 3 is fixedly connected to the rotating shaft 1 (for example, by interference fit, key connection, or the like), so that the first iron core 3 and the rotating shaft 1 rotate synchronously at the rotating shaft 1, and the first iron core 3 may extend along an axis direction of the rotating shaft 1. The iron core group is arranged with first iron core 3 along the footpath interval of pivot 1, and wherein second iron core 5 extends along the axis direction of pivot 1, and the iron core group includes at least one second iron core 5, and the both ends of second iron core 5 can flush with the both ends of first iron core 3, and second iron core 5 and 3 fixed connection of first iron core, for example through mode fixed connection such as pin, bonding, welding together.
As shown in fig. 1, 3 and 5, in some embodiments of the present invention, the first iron core 3 is provided with a receiving groove 101 on an outer circumferential surface thereof, and the iron core group is inserted into the receiving groove 101. In order to assemble first iron core 3 and iron core group into an overall structure, make things convenient for the assembly of iron core group and first iron core 3, reduce the magnetic leakage of magnet steel, increase the reluctance torque of motor. The first iron core 3 of the present invention may be completely embedded in the accommodating groove, or a part of the first iron core 3 may be embedded in the accommodating groove. In addition, when the iron core set is completely embedded into the accommodating groove, the outer side surface of the iron core set and the outer peripheral surface of the first iron core 3 can be on the same circumferential surface, so that the structure of the motor rotor 100 is optimized.
Optionally, at least one of the opposite surfaces of the first iron core 3 and the iron core group is provided with a first positioning slot, the first positioning slot is used for positioning the corresponding first magnetic steel 4, and the first magnetic steel 4 is embedded into the corresponding first positioning slot, for example, the first positioning slot may be provided on the surface of the first iron core 3 facing the iron core group; or a first positioning groove or the like is provided on the surface of the iron core group facing the first iron core 3. The first positioning groove can extend along the axis direction of the rotating shaft 1, and the first magnetic steel 4 in a long strip shape extending along the axis direction of the rotating shaft 1 can be embedded into the corresponding first positioning groove, so that the first magnetic steel 4 can be positioned through the first positioning groove. Through setting up first constant head tank, can realize first magnet steel 4's stable installation, avoid first magnet steel 4 to slide along electric motor rotor 100's circumference, promote electric motor rotor 100's performance.
In addition, a first notch can be arranged on at least one of two opposite sides of the first positioning groove, and the corner of the first magnetic steel 4 is opposite to the first notch. Wherein, first locating groove all is equipped with first breach along 1 ascending both sides in week of pivot, and first breach can be used for stepping down the bight of first magnet steel 4, has avoided the side influence of first locating groove first magnet steel 4's installation, improves first magnet steel 4's installation effectiveness and stability to can improve the utilization ratio of magnet steel effectively.
As shown in fig. 5, in some embodiments of the present invention, the recess includes a first inner side surface 1031, a second inner side surface 1032 and a connecting surface 1033, the first inner side surface 1031 and the second inner side surface 1032 are respectively connected to two sides of the connecting surface 1033, a flared shape is configured between the first inner side surface 1031 and the second inner side surface 1032, and a first magnetic steel 4 is disposed between each of the first inner side surface 1031, the connecting surface 1033 and the second inner side surface 1032 and the set of iron cores. As shown in fig. 5, in the circumferential direction of the motor rotor 100, the first inner side surface 1031, the connection surface 1033, and the second inner side surface 1032 are sequentially connected to form an accommodating groove 101 with an opening away from the rotating shaft 1, and at least a part of the iron core set is embedded into the accommodating groove 101, thereby completing the installation and assembly of the iron core set. In addition, the reluctance torque of the motor having the motor rotor 100 can be effectively increased by providing the plurality of first magnetic steels 4.
In addition, the iron core set of the present invention may include one second iron core 5 or at least two second iron cores 5, for example, the iron core set may include one second iron core 5, the second iron core 5 is spaced apart from the first iron core 3 in the radial direction of the rotating shaft 1, and the second iron core 5 is fixedly connected to the first iron core 3; the iron core group can also comprise at least two second iron cores 5, the first iron cores 3 and the second iron cores 5 are arranged along the radial layer by layer of the rotating shaft 1, and the second iron cores 5 are fixedly connected with the first iron cores 3.
Alternatively, as shown in fig. 5, the iron core set includes at least two second iron cores 5, and the second iron cores 5 in the iron core set are spaced layer by layer radially outward of the rotating shaft 1, that is, the first iron core 3 and the second iron cores 5 in the iron core set are spaced layer by layer radially outward of the rotating shaft 1. The rotating shaft 1, the first iron core 3 and the second iron core 5 are fixedly connected. And a second magnetic steel 6 is arranged between every two adjacent second iron cores 5. Through setting up the iron core into multilayer structure, can reduce the magnetic leakage coefficient effectively, improve the utilization ratio of magnet steel, increased the salient pole rate of motor simultaneously.
As mentioned above, at least one first magnetic steel 4 may be disposed between the first iron core 3 and one iron core group, and similarly, at least one second magnetic steel 6 may be disposed between every two adjacent second iron cores 5.
As shown in fig. 5, in some embodiments of the present invention, one of every two adjacent second cores 5 close to the first core 3 includes a first branch portion 51, a second branch portion 52, and a third branch portion 53, the second branch portion 52 and the third branch portion 53 are connected to opposite sides of the first branch portion 51, and the first branch portion 51, the second branch portion 52, and the third branch portion 53 are connected in a U shape that is open away from the first core 3. Thereby facilitating the matching of the iron core group and the first iron core 3 and improving the assembly efficiency and the space utilization rate of the motor rotor 100.
In the circumferential direction of motor rotor 100, second branch portion 52, first branch portion 51, and third branch portion 53 are connected in sequence to form a U shape with an opening away from first core 3. Second magnetic steels 6 are arranged between the first branch part 51, the second branch part 52 and the third branch part 53 and the adjacent second iron core 5. Any one of the first branch portion 51, the second branch portion 52 and the third branch portion 53 may be disposed with one or more second magnetic steels 6 between the adjacent second iron cores 5, and the second magnetic steels 6 extend along a direction parallel to the axis of the rotating shaft 1, and two ends of the second magnetic steels 6 may be flush with two ends of the first iron cores 3. As shown in fig. 5, two second magnetic steels 6 are provided between the first branch portion 51 and the adjacent second iron core 5, and one second magnetic steel 6 is provided between each of the second branch portion 52 and the third branch portion 53 and the adjacent second iron core 5.
Optionally, at least one of the opposite surfaces of two adjacent second iron cores 5 is provided with a second positioning groove, and the corresponding second magnetic steel 6 can be positioned by the second positioning groove. Wherein, the second constant head tank can be followed the axis direction extension of pivot 1, and the rectangular shape second magnet steel 6 that extends along the axis direction of pivot 1 can be embedded into the second constant head tank to realize the location to second magnet steel 6 through the second constant head tank. Through setting up the second constant head tank, can realize second magnet steel 6's stable installation, avoid second magnet steel 6 to slide along electric motor rotor 100's circumference, promote electric motor rotor 100's performance.
At least one of the two opposite sides of the second positioning groove is provided with a second notch, and the corner of the second magnetic steel 6 is opposite to the second notch. Wherein, the second constant head tank all is equipped with the second breach along 1 ascending both sides in week of pivot, and the second breach can be used for stepping down the bight of second magnet steel 6, has avoided the side of second constant head tank to influence the installation of second magnet steel 6, improves the installation effectiveness and the stability of second magnet steel 6 to can improve the utilization ratio of magnet steel effectively.
Optionally, a third magnetic steel 8 is embedded in an outermost one of the second cores 5. Therefore, the utilization rate of the magnetic steel in the motor rotor 100 can be further improved.
Optionally, motor rotor 100 further includes magnetic isolation plates 2, where magnetic isolation plates 2 are fixedly connected to two ends of rotating shaft 1, first iron core 3 and second iron core 5 are both disposed between magnetic isolation plates 2 at two ends of rotating shaft 1, and second iron core 5 is connected to magnetic isolation plates 2. Wherein, can set up first mounting hole on second iron core 5, set up the second mounting hole on magnetic shield 2, pass first mounting hole and second mounting hole through the mounting to be in the same place second iron core 5 and magnetic shield 2 fixed connection. Of course, the connection between the second core 5 and the magnetic shield 2 can be realized in other manners.
The magnetism isolating plate 2 can be fixed together with the rotating shaft 1 through interference fit, key slot fit and other modes, so that stable positioning between the rotating shaft 1 and the magnetism isolating plate 2 is realized, and the second iron core 5 can be fixedly connected with the magnetism isolating plate 2, so that fixed connection between the first iron core 3, the second iron core 5 and the rotating shaft 1 is realized.
Wherein, the both ends of the edge on the pivot axis direction of second iron core 5 can set up first connecting hole 102, have set up second connecting hole 103 on the magnetic shield 2, first connecting hole 102 is relative with second connecting hole 103 to concatenate first connecting hole 102 and second connecting hole 103 through the mounting, realize being connected of second iron core 5 and magnetic shield 2, and then realize the fixed connection of second iron core 5 and first iron core 3. Wherein the fixing member may be a coupling bolt. The gap between the first core 3 and the second core 5 may be filled with glue.
In addition, in combination with other embodiments of the present invention, the iron core set may include at least two second iron cores 5, each second iron core 5 may be connected to the magnetic shield 2 in the foregoing manner, so as to achieve the fixed connection between the first iron core 3 and the second iron core 5, and the gap between two adjacent second iron cores 5 may also be filled with glue.
Optionally, the motor rotor 100 further includes a thermal sleeve ring 10, the thermal sleeve ring 10 is sleeved on the rotating shaft 1, and the thermal sleeve ring 10 is disposed on one side of the magnetic shield 2, which is far away from the first iron core 3, so as to limit the magnetic shield 2.
In addition, a plurality of lightening holes 104 may be formed in the first core 3 according to the present invention, and the plurality of lightening holes 104 may be formed in a direction around the rotating shaft 1, thereby achieving lightening of the first core 3.
Optionally, the lightening hole 104 extends in a direction parallel to the axis of the rotating shaft, and the lightening hole 104 may penetrate at least one end of the first iron core 3 in the axial direction, so that heat may be dissipated from the lightening hole 104 to improve the heat dissipation effect, in addition, a plurality of iron core groups may be disposed around the first iron core 101 in the present invention, the lightening hole 104 may correspond to the iron core group in the radial direction of the rotating shaft, and the plurality of lightening holes 104 may be spaced from each other, so as to ensure that the first iron core 3 has sufficient supporting function, and effectively improve the structural strength of the motor rotor.
Specifically, referring to fig. 5, the first iron core 3 includes an inner ring hub 31, an outer ring hub 32, and a plurality of support ribs 33, where the inner ring hub 31 is fixed to the periphery of the rotating shaft 1 in a sleeved manner, the outer ring hub 32 surrounds the inner ring hub 31, the outer ring hub 32 and the inner ring hub 31 are spaced apart from each other in the radial direction of the rotating shaft 1, the support ribs extend in the radial direction of the rotating shaft 1, one end of each support rib 33 is connected to the inner ring hub 31, and the other end of each support rib 33 is connected to and extends out of the outer ring hub 32, the plurality of support ribs 33 are spaced apart from each other in the circumferential direction of the rotating shaft 1, a plurality of lightening holes 104 can be formed between the inner ring hub 31 and the outer ring hub 32 through the plurality of support ribs 33, the plurality of lightening holes 104 are spaced apart from each other in the circumferential direction of the rotating shaft 1, and in addition, the plurality of support ribs 33 extend out of the outer ring hub 32, and form a containing groove for placing the iron core set. The inner ring hub 31, the outer ring hub 32, and the plurality of support ribs 33 may be integrally formed.
This patent is creative falls into a plurality of pieces with the iron core, uses magnetic shield 2 as the support component, has cancelled the magnetic bridge structure completely under the prerequisite of guaranteeing electric motor rotor 100 intensity, falls to the minimum with magnet steel magnetic leakage coefficient, has improved the utilization ratio of magnet steel, can use still less magnet steel under same condition, has saved the magnet steel cost. Meanwhile, the salient pole ratio of the motor is increased, the difference value of d-axis inductance and q-axis inductance is increased, the reluctance torque of the motor is increased, the cost is reduced, and the power density of the motor is improved.
The utility model provides a motor rotor 100 structure with high reluctance torque, which comprises a rotating shaft 1, a magnetism isolating plate 2, a first iron core 3, a second iron core 5, first magnetic steel 4, second magnetic steel 6, third magnetic steel 8, a connecting bolt 9 and a shrink-ring 10. This structure is with the magnet steel, the iron core falls into several pieces, the magnet steel includes first magnet steel 4 promptly, second magnet steel 6 and third magnet steel 8, the iron core includes first iron core 3 and second iron core 5, the iron core sets up along the circumferencial direction of pivot 1, the axial tip along pivot 1 on every second iron core 5 is provided with the aperture, insert connecting bolt 9 in the centre, connecting bolt 9's both ends are fixed on 1 both sides of pivot magnetism-isolating plate 2, the outside successive layer of radial direction along pivot 1 of iron core sets up. The magnetic steel is arranged between two adjacent layers of iron cores.
Wherein, can be connected through the interference between pivot 1 and the magnetism shield 2, or be connected through the keyway between pivot 1 and the magnetism shield 2, specifically choose which kind of connected mode mainly depends on the connected mode of iron core and pivot 1 for use. The magnetic steel can be clamped by the iron cores on two sides in the thickness direction, or the magnetic steel is glued with the iron cores, and a limiting groove is formed in the position, opposite to the width direction of the magnetic steel, of the magnetic core. The magnetic steel is generally positioned by adopting an adhesive process, and epoxy pouring sealant can also be poured into the magnetic steel groove.
The motor rotor 100 provided by the utility model can reduce magnetic steel flux leakage, increase the utilization rate of magnetic steel, increase the reluctance torque of the motor, improve the power density of the motor, ensure the strength of the motor rotor 100 and improve the competitiveness of the motor rotor product on the premise of saving cost. In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 5, which show the structure of the present patent, the present high reluctance motor rotor 100 structure includes the following components: pivot 1, first iron core 3, the second iron core 5, first magnet steel 4, second magnet steel 6, third magnet steel 8, first iron core 3, second iron core 5 is along keeping away from the direction of pivot 1 interval range upon range of in proper order, second iron core 5 includes a plurality ofly, a plurality of second iron cores 5 are along keeping away from the direction of pivot 1 interval range upon range of in proper order, first magnet steel 4 is located between first iron core 3 and the second iron core 5, second magnet steel 6 is located between two adjacent second iron cores 5, third magnet steel 8 is embedded into in outmost one in a plurality of second iron cores. Wherein, the rotating shaft 1 plays a supporting role in the whole structure;
the motor rotor 100 further comprises a magnetic isolation plate 2, and the magnetic isolation plate 2 not only plays a role in isolating magnetism and adjusting dynamic balance, but also can be used as a supporting component; the magnetic isolation plate 2 is connected with the second iron cores 5 through the connecting bolts 9, so that the second iron cores 5 and the third core are fixed. In addition, the end of the rotating shaft 1 is provided with a thermal lantern ring 10, after the magnetic isolation plate 2 and the iron core are fixed on the rotating shaft 1, the thermal lantern ring 10 is fixed on the end of the magnetic isolation plate 2, and the iron core and the magnetic isolation plate 2 are prevented from moving axially.
When the installation is carried out, firstly, the first iron core 3 is arranged on the rotating shaft 1 in an interference fit mode, and the rotating shaft 1 and the first iron core 3 are fixed. And then, a magnetism isolating plate 2 is arranged at one end of the rotating shaft 1, a plurality of small holes are regularly distributed on the outer ring of the magnetism isolating plate 2, and connecting bolts 9 are arranged in the small holes. The second iron core 5 is provided with a small hole at a proper position, and the small hole of the second iron core 5 is aligned with the connecting bolt 9 for installation. Insert first magnet steel 4 between first iron core 3 and second iron core 5 afterwards, second magnet steel 6 inserts between two adjacent second iron cores 5, and third magnet steel 8 inserts an outermost inside magnet steel position in a plurality of second iron cores, in addition, can also be through gluing technology or embedment technology fixed connection magnet steel and the iron core that corresponds. After the operation is finished, the magnetic shield plate 2 at the other side of the rotating shaft 1 is installed, small holes regularly distributed on the magnetic shield plate align to the connecting bolts 9, and finally the hot shrink ring 10 is sleeved on the rotating shaft 1 after being heated. The structural installation of this high reluctance motor rotor 100 is completed.
The magnetic steel mounting positions on the first iron core 3 and the second iron core 5 are designed to be of a concave structure, so that the magnetic steel mounting is guaranteed not to shake after being completed, and the normal work of the motor is influenced. Or the pouring sealant is injected into the hollow area surrounded by the magnetic steel and the iron core, so that the structural strength is increased on the premise that the magnetic steel cannot shake.
The iron core can design the number of layers of magnetic steel arrangement according to performance requirements during design, and the number of poles of the motor is not limited to the three layers and the eight poles shown in the figure. The method protected by the patent can be used for the treatment mode of the iron core between layers.
The following is a calculation formula of the motor torque:
p is the number of poles of the motor, #mThe permanent magnetic flux linkage refers to the magnetism generated by the magnetic steel, and is related to the material and the performance of the magnetic steel, the less the magnetic leakage of the magnetic steel is, the larger the permanent magnetic flux linkage is, id、iqIndicating d-and q-axis currents, Ld,LqThe high salient pole ratio of the motor is higher, and the difference value of the quadrature-direct axis inductance is larger.
According to the formula, the magnetic flux leakage coefficient of the magnetic steel can be greatly reduced by the design mode, the magnetic steel consumption is reduced under the same performance requirement, and the cost is reduced. Meanwhile, the salient pole rate of the motor is greatly increased, the difference value of the d-axis inductance and the q-axis inductance is increased, and the reluctance torque of the motor is increased.
A motor according to an embodiment of the present invention comprises a motor rotor 100 according to the foregoing. Through setting up aforementioned electric motor rotor 100, radially divide into the multilayer with the iron core along pivot 1, cancelled the magnetic bridge structure completely under the prerequisite of guaranteeing electric motor rotor 100 intensity, fall to the minimum with magnet steel magnetic leakage coefficient, improved the utilization ratio of magnet steel, can use still less magnet steel under same condition, saved the magnet steel cost. Meanwhile, the salient pole ratio of the motor is increased, the difference value of d-axis inductance and q-axis inductance is increased, the reluctance torque of the motor is increased, the cost is reduced, and the power density of the motor is improved. Thereby effectively improving the performance of the motor.
In addition, a plurality of the present invention includes two or more. The terms "first", "second" and "first" are used for descriptive purposes only 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; 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 the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 utility model. 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 and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. An electric machine rotor (100), comprising:
a rotating shaft (1);
the first iron core (3), the first iron core (3) is fixedly connected with the rotating shaft (1);
the plurality of iron core groups are arranged along the circumferential direction of the first iron core (3), the iron core groups and the first iron core (3) are separated along the radial direction of the motor rotor (100), each iron core group comprises at least one second iron core (5), and the second iron cores (5) are fixedly connected with the first iron cores (3);
first magnet steel (4), first magnet steel (4) are located first iron core (3) with between the iron core group.
2. The electric machine rotor (100) according to claim 1, wherein the first iron core (3) is provided with receiving slots on an outer circumferential surface thereof, and the iron core group is embedded in the receiving slots.
3. The electric machine rotor (100) of claim 2, characterized in that the groove comprises a first inner side, a second inner side and a connection face, the first inner side and the second inner side are connected to both sides of the connection face respectively, and a flared shape is constructed between the first inner side and the second inner side, the first inner side, the connection face and the second inner side and the first magnetic steel (4) are arranged between the iron core sets.
4. The electric machine rotor (100) according to claim 1, characterized in that at least one of the opposite surfaces of the first core (3) and the set of cores is provided with a first positioning slot for positioning a first magnetic steel (4).
5. The electric machine rotor (100) according to any one of claims 1-4, wherein the set of iron cores comprises at least two second iron cores (5), the second iron cores (5) in the set of iron cores are arranged at intervals layer by layer along the radial direction of the rotating shaft (1), and a second magnetic steel (6) is arranged between every two adjacent second iron cores (5).
6. The electric machine rotor (100) according to claim 5, wherein each adjacent two of the second cores (5) close to one of the first cores (3) comprises: the iron core comprises a first branch part (51), a second branch part (52) and a third branch part (53), wherein the second branch part (52) and the third branch part (53) are connected to two opposite sides of the first branch part (51), and the first branch part (51), the second branch part (52) and the third branch part (53) are connected into a U shape with an opening far away from the first iron core (3).
7. The electric machine rotor (100) according to claim 5, characterized in that at least one of the opposite surfaces of two adjacent second iron cores (5) is provided with a second positioning slot for positioning a second magnetic steel (6).
8. The electric machine rotor (100) of claim 5, characterized in that a third magnetic steel is embedded in an outermost one of the second cores (5).
9. The electric machine rotor (100) of claim 1, wherein the electric machine rotor (100) further comprises:
magnetic shield board (2), magnetic shield board (2) fixed connection in pivot (1) both ends, first iron core (3) with second iron core (5) are all located between magnetic shield board (2) at pivot (1) both ends, just second iron core (5) with magnetic shield board (2) link to each other.
10. The electric machine rotor (100) of claim 9, wherein the electric machine rotor (100) further comprises:
the hot lantern ring (10), the hot lantern ring (10) cup joint in on the pivot (1), just the hot lantern ring (10) are located keeping away from of magnetic shield (2) one side of first iron core (3) is with spacing magnetic shield (2).
11. The electric machine rotor (100) according to claim 1, wherein a plurality of lightening holes (104) are provided on the first core (3), and a plurality of the lightening holes (104) are provided in a direction surrounding the rotating shaft (1).
12. An electric machine, characterized in that it comprises an electric machine rotor (100) according to any of claims 1-11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121202078.3U CN215772709U (en) | 2021-05-31 | 2021-05-31 | Motor and motor rotor |
| PCT/CN2022/087456 WO2022252851A1 (en) | 2021-05-31 | 2022-04-18 | Motor and motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121202078.3U CN215772709U (en) | 2021-05-31 | 2021-05-31 | Motor and motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215772709U true CN215772709U (en) | 2022-02-08 |
Family
ID=80098779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121202078.3U Active CN215772709U (en) | 2021-05-31 | 2021-05-31 | Motor and motor rotor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215772709U (en) |
| WO (1) | WO2022252851A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022252851A1 (en) * | 2021-05-31 | 2022-12-08 | 比亚迪股份有限公司 | Motor and motor rotor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404777B (en) * | 2023-03-01 | 2024-03-05 | 天蔚蓝电驱动科技(江苏)有限公司 | Rotor without main magnetic bridge and manufacturing method of rotor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5493792B2 (en) * | 2009-12-09 | 2014-05-14 | トヨタ自動車株式会社 | IPM motor rotor and IPM motor |
| JP2012010556A (en) * | 2010-06-28 | 2012-01-12 | Aisin Seiki Co Ltd | Rotor for rotating electrical machine |
| JP2015195638A (en) * | 2014-03-31 | 2015-11-05 | ダイキン工業株式会社 | rotor |
| JP2019140843A (en) * | 2018-02-14 | 2019-08-22 | アイシン・エィ・ダブリュ株式会社 | Rotor for rotary electric machine |
| CN215772709U (en) * | 2021-05-31 | 2022-02-08 | 比亚迪股份有限公司 | Motor and motor rotor |
-
2021
- 2021-05-31 CN CN202121202078.3U patent/CN215772709U/en active Active
-
2022
- 2022-04-18 WO PCT/CN2022/087456 patent/WO2022252851A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022252851A1 (en) * | 2021-05-31 | 2022-12-08 | 比亚迪股份有限公司 | Motor and motor rotor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022252851A1 (en) | 2022-12-08 |
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