CN111130238A - Motor rotor and motor - Google Patents
Motor rotor and motor Download PDFInfo
- Publication number
- CN111130238A CN111130238A CN201811277046.2A CN201811277046A CN111130238A CN 111130238 A CN111130238 A CN 111130238A CN 201811277046 A CN201811277046 A CN 201811277046A CN 111130238 A CN111130238 A CN 111130238A
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- magnetic steel
- arc
- magnetic bridge
- arc line
- electric machine
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a motor rotor and a motor, wherein the motor rotor comprises: the rotor core comprises a plurality of stacked first stamped sheets and a plurality of stacked second stamped sheets, wherein a plurality of first magnetic steel grooves extending along the circumferential direction are formed in the first stamped sheets, second magnetic steel grooves arranged corresponding to the first magnetic steel grooves one by one are formed in the second stamped sheets, a first outer magnetic bridge of a multi-section structure is defined at one end, opposite to the anticlockwise direction, of each first magnetic steel groove, a first outer magnetic bridge is defined at one end, opposite to the clockwise direction, of each second magnetic steel groove, and a containing groove capable of penetrating through two ends of the rotor core is defined in an axially overlapped area of the corresponding first magnetic steel grooves and the corresponding second magnetic steel grooves; and the permanent magnets are correspondingly arranged in the accommodating grooves. By the technical scheme, the permanent magnet can resist the probability of local demagnetization.
Description
Technical Field
The invention relates to the field of motors, in particular to a motor rotor and a motor.
Background
In the related art, the problem of demagnetization of a permanent magnet needs to be considered for the design of an interior permanent magnet motor, and particularly, the local demagnetization phenomenon is more likely to occur because the iron core at the position, which is thinner and is more strongly influenced by the magnetic field of a stator, of the permanent magnet is close to the edge of the iron core of a rotor.
Disclosure of Invention
In order to solve at least one of the above technical problems, an object of the present invention is to provide a rotor for an electric machine.
It is another object of the present invention to provide an electric machine.
In order to achieve the above object, a first aspect of the present invention provides a rotor of an electric machine, including: the rotor core comprises a plurality of stacked first stamped sheets and a plurality of stacked second stamped sheets, wherein a plurality of first magnetic steel grooves extending along the circumferential direction are formed in the first stamped sheets, second magnetic steel grooves arranged corresponding to the first magnetic steel grooves one by one are formed in the second stamped sheets, a first outer magnetic bridge of a multi-section structure is defined at one end, opposite to the anticlockwise direction, of each first magnetic steel groove, a first outer magnetic bridge is defined at one end, opposite to the clockwise direction, of each second magnetic steel groove, and a containing groove capable of penetrating through two ends of the rotor core is defined in an axially overlapped area of the corresponding first magnetic steel grooves and the corresponding second magnetic steel grooves; and the permanent magnets are correspondingly arranged in the accommodating grooves.
In this technical scheme, through injecing first towards piece and second towards piece respectively, and set up first magnetic steel groove on the first towards piece, set up second magnetic steel groove on first towards piece, through set up the first outside magnetic bridge that is in the reversal end on first magnetic steel groove and second magnetic steel groove respectively, to the thinner region of iron core, through the first outside magnetic bridge that sets up the multistage formula structure, be favorable to increasing the magnetic bridge width, with the iron core thickness that increases this department, thereby can weaken the influence in the stator magnetic field of here, on the one hand, the probability that can the anti local demagnetization of permanent magnet, thereby the life of extension motor, on the other hand, through the structure of improving outside magnetic bridge, also be favorable to promoting the performance of motor.
The first magnetic steel grooves on two adjacent first punching sheets and the second magnetic steel grooves on the second punching sheets are arranged correspondingly one by one, the first magnetic steel grooves on two adjacent first punching sheets are arranged correspondingly one by one, and the second magnetic steel grooves on two adjacent second punching sheets are arranged correspondingly one by one, aiming at different stacking modes.
In addition, the motor rotor in the above technical solution provided by the present invention may further have the following additional technical features:
in the above technical scheme, preferably, the end of the first magnetic steel groove relatively in the clockwise direction has a second outer magnetic bridge with a constant width defined by concentric arc segments, and the end of the second magnetic steel groove relatively in the counterclockwise direction defines the second outer magnetic bridge.
In this technical scheme, through set up the second outside magnetic bridge that is in reverse end on first magnetic steel groove and second magnetic steel groove respectively, for first outside magnetic bridge, second outside magnetic bridge is invariable thickness structure, through mutually supporting with first outside magnetic bridge, under the prerequisite that need not increase permanent magnet thickness, also is favorable to overcoming the local demagnetization problem of permanent magnet.
Furthermore, through setting up the first outside magnetic bridge that the width is inconstant, with the second outside magnetic bridge that the width is invariable, when guaranteeing that the magnetic bridge has effective width, reduce the influence of stator magnetic field in magnetic bridge department to the realization reduces the mesh that probability appears in the demagnetization phenomenon.
In any of the above solutions, preferably, the motor rotor is constructed in a tile structure.
In any of the above technical solutions, preferably, a section of the first outer magnetic bridge near the permanent magnet is configured to extend inward, so that the permanent magnet and the first outer magnetic bridge are disposed in contact with each other.
In this technical scheme, through being provided with the inboard slope with the innermost one section in the multistage formula structure of first outside magnetic bridge, when increasing iron core thickness this department, can also carry on spacingly to the permanent magnet.
In any one of the above technical solutions, preferably, the circumferential profile of the rotor core is formed by a plurality of groups of arc segments connected end to end, and each group of arc segments includes a first arc line, a second arc line and a third arc line which are connected in sequence.
In the technical scheme, the circumferential profile of the rotor core is set to be a closed profile formed by connecting a plurality of groups of arc sections, and each section of arc section sequentially comprises a first arc line, a second arc line and a third arc line, so that the optimization of the air gap flux density between the motor rotor and the motor stator matched with the motor rotor is facilitated.
In any of the above technical solutions, preferably, the center of the second arc line is concentric with the axis of the rotating shaft of the motor rotor, the first arc line and the third arc line are respectively in tangent type smooth connection with the second arc line, and the centers of the first arc line and the third arc line are not concentric with the axis.
In the technical scheme, in a group of the first arc line, the second arc line and the third arc line, the circle center of the second arc line coincides with the axis, the circle centers of the first arc line and the third arc line do not coincide with the axis, and the radius of the first arc section and the radius of the third arc section are smaller than that of the second arc section.
The first arc segment and the third arc segment may have the same radius or different radii.
In any of the above technical solutions, preferably, for two adjacent sets of arc segments, the first arc line of one of the two adjacent sets of arc segments is connected with the third arc line of the other one of the two adjacent sets of arc segments, and an included angle that is concave towards the axial center direction is formed at the connection position.
In the technical scheme, an included angle is formed at the joint of the adjacent first arc line and the third arc line, so that the air gap flux density between the motor rotor and the motor stator can be further optimized, and the purpose of improving the motor performance is achieved.
In any of the above technical solutions, preferably, on the first punch, a first outer magnetic bridge is defined by the third arc line and one end of the adjacent first magnetic steel groove, and a second outer magnetic bridge is formed by the first arc line and the other end; on the second punching sheet, a first outer magnetic bridge is formed by the first arc line and one end of the adjacent second magnetic steel groove, and a second outer magnetic bridge is limited by the third arc line and the other end.
In any of the above technical solutions, preferably, the multi-section structure is a two-section structure, and includes an outer narrow portion magnetic bridge structure and an outer wide portion magnetic bridge structure.
In this technical scheme, as a setting mode of the first outside magnetic bridge of multistage formula structure, first outside magnetic bridge is two segmentation structures, including outside narrow portion magnetic bridge structure and outside wide portion magnetic bridge structure, wherein, outside narrow portion magnetic bridge structure can the magnetic bridge structure of constant width, and outside wide portion magnetic bridge structure is through extending the structure formation to the inboard along outside narrow portion magnetic bridge structure, and then realizes the increase of local thickness to reach the mesh that reduces the magnetic leakage. In any of the above technical solutions, preferably, the outer narrow portion magnetic bridge structure is defined by an outer edge arc section on the outer edge of the iron core, and a first arc section structure on the first outer magnetic bridge concentric with the outer edge arc section.
In any of the above technical solutions, preferably, the outer wide portion magnetic bridge structure is defined by a second arc segment connected with the first arc segment and recessed inward and a corresponding outer edge arc segment.
In addition, it will also be appreciated by those skilled in the art that the structure for achieving a local increase in thickness may be other polygonal structures than the second arc segment structure of the inner recess defined above.
In any one of the above technical solutions, preferably, the first magnetic steel groove and the second magnetic steel groove are provided with a protruding structure protruding into the groove on the inner side opposite to the second outer magnetic bridge, so as to limit the two ends of the permanent magnet respectively with the second arc segment.
In this technical scheme, through set up protruding structure in one side of the outside magnetic bridge of second to and set up the sunken second segmental arc in inboard in one side of the outside magnetic bridge of first, realize spacing the both ends of permanent magnet, in order to realize permanent magnet length direction's fixed.
In any one of the above technical solutions, preferably, the first punching sheet and the second punching sheet are alternately stacked in the axial direction.
In the technical scheme, the first punching sheet and the second punching sheet are alternately stacked along the axial direction, so that a first regular stacking mode of the first punching sheet and the second punching sheet is realized, and the requirement for reducing the local demagnetization probability is met.
In any one of the above technical solutions, preferably, the plurality of first punching sheets are stacked in the axial direction to form a first group of punching sheets, the plurality of second punching sheets are stacked in the axial direction to form a second group of punching sheets, and the first group of punching sheets and the second group of punching sheets are fixedly assembled in the axial direction.
In the technical scheme, the plurality of first punching sheets are axially stacked and the plurality of second punching sheets are circumferentially stacked to form the integral rotor core, so that a second regular stacking mode of the first punching sheets and the second punching sheets is realized, and the requirement for reducing the local demagnetization probability can be met.
The second aspect of the present invention provides an electric motor, including the electric motor rotor according to the technical solution of the first aspect of the present invention, and an electric motor stator disposed in cooperation with the electric motor rotor.
The motor can be an inner rotor motor or an outer rotor motor.
One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages:
through set up first outside magnetic bridge and the second outside magnetic bridge that is in reverse end on first magnetic steel groove and second magnetic steel groove respectively, to the thinner region of iron core, through the outside magnetic bridge that sets up multistage formula structure, be favorable to increasing the magnetic bridge width, on the one hand, the probability that can the anti local demagnetization of permanent magnet to the life of extension motor, on the other hand, through the structure that improves outside magnetic bridge, also be favorable to promoting the performance of motor.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic plan view of a rotor core according to a first embodiment of the present invention;
fig. 2 shows a schematic plan view of a rotor of an electric machine according to a first embodiment of the invention;
FIG. 3 shows a schematic view of a portion of the structure at A in FIG. 1;
fig. 4 is a schematic plan view showing a rotor core according to a second embodiment of the present invention;
fig. 5 is a perspective view illustrating a rotor core according to a third embodiment of the present invention;
FIG. 6 shows a partial schematic of the structure at B in FIG. 5;
fig. 7 is a perspective view schematically showing a rotor core according to a fourth embodiment of the present invention;
fig. 8 shows a partial structural view at C in fig. 7.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:
1 motor rotor, 10 first punching sheet, 20 second punching sheet, 102 first magnetic steel groove, 202 second magnetic steel groove, 104 first outside magnetic bridge, 106 second outside magnetic bridge, 108 first circular arc line, 110 second circular arc line, 112 third circular arc line, 1042 outside narrow part magnetic bridge structure, 1044 outside wide part magnetic bridge structure, 30 permanent magnet, 1062 protruding structure.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A rotor of an electric machine according to some embodiments of the invention is described below with reference to fig. 1 and 8.
As shown in fig. 1 to 8, a rotor 1 of an electric machine according to an embodiment of the present invention includes: a rotor core, including a plurality of stacked first punching sheets 10 and second punching sheets 20, as shown in fig. 1, the first punching sheets 10 are provided with a plurality of first magnetic steel slots 102 extending along a circumferential direction, as shown in fig. 4, the second punching sheets 20 are provided with a plurality of second magnetic steel slots 202 arranged corresponding to the first magnetic steel slots 102 one by one, it can be understood by those skilled in the art that, as for the first magnetic steel slots 102 and the second magnetic steel slots 202, the only difference is that magnetic isolation magnetic bridges defined at two ends are arranged oppositely, that is, a first end of the first magnetic steel slot 102 defines a first outer magnetic bridge 104, a second end defines a second outer magnetic bridge 106, a position of the second magnetic steel slot 202 coinciding with the first end of the first magnetic steel slot 104 defines a first outer magnetic bridge 104, a position of the second magnetic steel slot 102 coinciding with the first end of the first magnetic steel slot 102 and a corresponding outer edge of the core define a first outer magnetic bridge 104, a second outer magnetic bridge 106 with constant width is defined by one end, in the clockwise direction, of the first magnetic steel slot 102 and the corresponding outer edge of the iron core, a second outer magnetic bridge 106 is defined by one end, in the counterclockwise direction, of the second magnetic steel slot 202 and the corresponding outer edge of the iron core, a first outer magnetic bridge 104 is defined by one end, in the clockwise direction, of the second magnetic steel slot 202 and the corresponding outer edge of the iron core, and accommodating slots capable of penetrating through two ends of the iron core are defined by the overlapping regions of the corresponding first magnetic steel slots 102 and the second magnetic steel slots 202 in the axial direction; as shown in fig. 2, the permanent magnet 30 is correspondingly disposed in the accommodating groove, wherein the first outer magnetic bridge 104 is configured as a multi-segment structure, and the width of the second outer magnetic bridge 106 is constant.
In this embodiment, a first punching sheet 10 (shown in fig. 2) and a second punching sheet 20 (shown in fig. 4) are defined respectively, a first magnetic steel groove 102 is formed in the first punching sheet 10, a second magnetic steel groove 202 is formed in the first punching sheet 10, a first outer magnetic bridge 104 and a second outer magnetic bridge 106 at opposite ends are formed in the first magnetic steel groove 102 and the second magnetic steel groove 202 respectively, and the outer magnetic bridge with a multi-section structure is arranged in a thin iron core region, so that the width of the magnetic bridge is increased.
As can be understood by those skilled in the art, the number of the first magnetic steel grooves 102 on the first stamped sheet 10 is the same as the number of the second magnetic steel grooves 202 on the second stamped sheet 20, and the first magnetic steel grooves 102 on two adjacent first stamped sheets 10 and the second magnetic steel grooves 202 on the second stamped sheet 20 are correspondingly arranged one by one, the first magnetic steel grooves 102 on two adjacent first stamped sheets 10 are correspondingly arranged one by one, and the second magnetic steel grooves 202 on two adjacent second stamped sheets 20 are correspondingly arranged one by one, for different stacking manners.
In the above-described embodiment, the motor rotor 1 is preferably constructed in a tile structure.
In any of the above embodiments, as shown in fig. 3, preferably, a section of the first outer magnetic bridge 104 adjacent to the permanent magnet 30 is configured to extend inward, so that the permanent magnet 30 and the first outer magnetic bridge 104 are disposed in contact with each other.
In this embodiment, the innermost section of the multi-section structure of the first outer magnetic bridge 104 is inclined inward, so that the permanent magnet 30 can be restrained while the thickness of the core is increased.
As shown in fig. 1 and 4, in any of the above embodiments, preferably, the circumferential profile of the rotor core is formed by a plurality of sets of arc segments connected end to end, and each set of arc segments includes a first arc line 108, a second arc line 110 and a third arc line 112 connected in sequence.
In this embodiment, the circumferential profile of the rotor core is set to be a closed profile formed by connecting a plurality of groups of arc segments, and each arc segment sequentially comprises a first arc line 108, a second arc line 110 and a third arc line 112, which is beneficial to optimizing the air gap flux density between the motor rotor 1 and the motor stator matched with the motor rotor.
As shown in fig. 1 and 4, it can be understood by those skilled in the art that both the first stamped sheet 10 and the second stamped sheet 20 are formed by a plurality of groups of arc segments connected end to end, and each group of arc segments includes a first arc line 108, a second arc line 110, and a third arc line 112 connected in sequence.
In any of the above embodiments, preferably, the center of the second arc line 110 is concentric with the axis of the rotating shaft of the motor rotor 1, the first arc line 108 and the third arc line 112 are respectively tangent to the second arc line 110 and are connected smoothly, and the centers of the first arc line 108 and the third arc are not concentric with the axis.
In this embodiment, in a set of the first arc line 108, the second arc line 110, and the third arc line 112, the center of the second arc line 110 coincides with the axis, the centers of the first arc line 108 and the third arc line 112 do not coincide with the axis, and the radius of the first arc segment and the radius of the third arc segment are smaller than the radius of the second arc segment.
The first arc segment and the third arc segment may have the same radius or different radii.
In any of the above embodiments, preferably, for two adjacent sets of arc segments, the first arc line 108 of one of the two adjacent sets is connected with the third arc line 112 of the other of the two adjacent sets, and an included angle that is concave in the axial direction is formed at the connection.
In this embodiment, an included angle is formed at the connection between the adjacent first arc line 108 and the third arc line 112, so that the air gap flux density between the motor rotor 1 and the motor stator can be further optimized, and the purpose of improving the motor performance is achieved.
In any of the above embodiments, as shown in fig. 1, preferably, on the first punching sheet 10, one end of the first magnetic steel groove 102, where the third circular arc line 112 is adjacent to the first circular arc line 108, of the first outer magnetic bridge 104 defines the first outer magnetic bridge 104, and the first circular arc line 108 and the other end form the second outer magnetic bridge 106.
As shown in fig. 4, on the second punching sheet 20, a first outer magnetic bridge is formed at one end of the second magnetic steel groove 202 where the first arc line 108 is adjacent to the first arc line 108, and a second outer magnetic bridge 106 is defined by the third arc line 112 and the first outer magnetic bridge 104 at the other end.
As shown in fig. 3, in any of the above embodiments, preferably, the multi-section structure is a two-section structure, and includes an outer narrow-part magnetic bridge structure 1042 and an outer wide-part magnetic bridge structure 1044.
In this embodiment, as an arrangement manner of the first outer magnetic bridge 104 with a multi-segment structure, the first outer magnetic bridge 104 has a two-segment structure, and includes an outer narrow-portion magnetic bridge structure 1042 and an outer wide-portion magnetic bridge structure 1044, wherein the outer narrow-portion magnetic bridge structure 1042 can be a magnetic bridge structure with a constant width, and the outer wide-portion magnetic bridge structure 1044 is formed by extending the outer narrow-portion magnetic bridge structure 1042 to the inner side, so as to increase the local thickness, thereby achieving the purpose of reducing the magnetic leakage.
In any of the above embodiments, as shown in fig. 3, 6 and 8, preferably the outer narrow portion magnetic bridge structure 1042 is defined by an outer arc on the outer edge of the core and a first arc configuration concentric with the outer arc on the first outer magnetic bridge 104.
In any of the above embodiments, as shown in fig. 3, 6 and 8, the outer wide portion magnetic bridge structure 1044 is preferably defined by an inwardly concave second arc segment connected to the first arc segment and a corresponding outer edge arc segment.
In addition, it will also be appreciated by those skilled in the art that the structure for achieving a local increase in thickness may be other polygonal structures than the second arc segment structure of the inner recess defined above.
As shown in fig. 1, 4, 6 and 8, in any of the above embodiments, preferably, a protruding structure 1062 protruding into the groove is disposed on the first magnetic steel groove 102 and the second magnetic steel groove 202 at the inner side opposite to the second outer magnetic bridge 106, so as to limit the two ends of the permanent magnet 30 with the second arc segment respectively.
In this embodiment, the protruding structure 1062 is disposed on one side of the second outer magnetic bridge 106, and the second arc segment recessed inside is disposed on one side of the first outer magnetic bridge 104, so as to limit two ends of the permanent magnet 30, and fix the permanent magnet 30 in the length direction.
As shown in fig. 5 and 6, in any of the above embodiments, preferably, the first punching sheet 10 and the second punching sheet 20 are alternately stacked in the axial direction.
In this embodiment, the first punching sheets 10 and the second punching sheets 20 are alternately stacked in the axial direction, so that a first regular stacking manner of the first punching sheets 10 and the second punching sheets 20 is realized, and a requirement for reducing a local demagnetization probability is met.
As shown in fig. 7 and 8, in any of the above embodiments, preferably, the first punching sheets 10 are stacked axially to form a first group of punching sheets, the second punching sheets 20 are stacked axially to form a second group of punching sheets, and the first group of punching sheets and the second group of punching sheets are fixedly assembled axially.
In this embodiment, after the plurality of first laminations 10 are axially stacked and the plurality of second laminations 20 are circumferentially stacked, the first laminations 10 and the second laminations 20 are assembled into an integral rotor core, so that a second regular stacking manner of the first laminations 10 and the second laminations 20 is realized, and the requirement for reducing the local demagnetization probability can be met.
As shown in fig. 1 to 4, a motor rotor 1 according to an embodiment of the present invention includes a first punching sheet 10, a first magnetic steel groove 102 opened on the first punching sheet 10, a second punching sheet 20, a second magnetic steel groove 202 opened on the second punching sheet 20, and a permanent magnet 30. A plurality of magnetic steel grooves are evenly arranged along the circumferential direction of the rotor core, the permanent magnet 30 is placed in a containing groove formed by the magnetic steel grooves, and two ends of the outer side of the circumferential direction of the permanent magnet 30 are in contact with two ends of the outer side of the magnetic steel grooves, so that when the rotor is prevented from rotating, the permanent magnet 30 and the magnetic steel grooves are relatively displaced, and the permanent magnet 30 is damaged.
As shown in fig. 3, the first outer magnetic bridge 104 is defined by the first arc line 108 on the outer edge of the first stamped sheet 10 and the first outer magnetic bridge 104 at one end of the magnetic steel slot close to the first arc line 108, in this embodiment, the first outer magnetic bridge 104 is a two-segment structure including an outer narrow-portion magnetic bridge structure 1042 and an outer wide-portion magnetic bridge structure 1044, wherein the outer wide-portion magnetic bridge structure 1044 protrudes inward and contacts with the outer end of the permanent magnet 30.
As shown in fig. 2, the outer edge third arc line 112 of the first punching sheet 10 and one end of the magnetic steel groove close to the third arc line 112 form a concentric second outer magnetic bridge 106, that is, the two radial ends of the second outer magnetic bridge 106 are concentric arcs, so as to form a constant width structure, the inner side of the magnetic steel groove is further provided with a protrusion structure 1062, the protrusion structure 1062 is tightly attached to one end of the permanent magnet 30 close to the concentric second outer magnetic bridge 106, and the protrusion structure 1062 and the outer side wide portion magnetic bridge structure 1044 are located on two circumferential sides of the magnetic steel groove and are equal to the distance from the center line of the magnetic steel groove.
The magnetic steel groove structure of the second punching sheet 20 is opposite to that of the first punching sheet 10. A concentric second outer magnetic bridge 106 is formed by the first arc line 108 at the outer edge of the second punching sheet 20 and one end of the magnetic steel groove close to the first arc line 108; the outer edge third arc line 112 of the second punching sheet 20 and the first outer magnetic bridge 104 at one end of the magnetic steel groove close to the third arc line 112 define a first outer magnetic bridge 104, in this embodiment, the first outer magnetic bridge 104 is a two-segment structure, including an outer narrow-portion magnetic bridge structure 1042 and an outer wide-portion magnetic bridge structure 1044. The inner side of the magnetic steel slot is provided with a convex structure 1062, the convex structure 1062 is tightly attached to one end of the permanent magnet 30 close to the concentric second outer magnetic bridge 106, and the convex structure 1062 and the outer wide portion magnetic bridge structure 1044 are located on two circumferential sides of the magnetic steel slot and have the same distance with the center line of the magnetic steel slot.
According to the rotor core of one embodiment of the present invention, the first punching sheets 10 are alternately stacked with the second punching sheets 20, as shown in fig. 5.
According to a rotor core of another embodiment of the present invention, a plurality of first punching sheets 10 are alternately stacked in groups with a plurality of second punching sheets 20, as shown in fig. 7.
The motor according to the embodiment of the invention comprises the motor stator and the motor rotor matched with the motor stator.
The motor can be an inner rotor motor or an outer rotor motor.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. 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 description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily 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.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1. An electric machine rotor, comprising:
the rotor core comprises a plurality of stacked first stamped sheets and a plurality of stacked second stamped sheets, wherein a plurality of first magnetic steel grooves extending along the circumferential direction are formed in the first stamped sheets, a plurality of second magnetic steel grooves which are arranged corresponding to the first magnetic steel grooves one by one are formed in the second stamped sheets, a first outer magnetic bridge of a multi-section structure is defined at one end, in the anticlockwise direction, of the first magnetic steel grooves, a first outer magnetic bridge is defined at one end, in the clockwise direction, of the second magnetic steel grooves, and a containing groove which can penetrate through two ends of the rotor core is defined at an axially overlapped area of the first magnetic steel grooves and the second magnetic steel grooves;
and the permanent magnets are correspondingly arranged in the accommodating grooves.
2. The electric machine rotor of claim 1,
the first magnetic steel groove is provided with a second outer magnetic bridge which is limited by a concentric arc section and has a constant width at one end in the clockwise direction, and the second magnetic steel groove is limited at one end in the counterclockwise direction.
3. The electric machine rotor of claim 1,
the motor rotor is constructed in a tile structure.
4. The electric machine rotor of claim 1,
one section of the first outer magnetic bridge, which is close to the permanent magnet, extends inwards to enable the permanent magnet and the first outer magnetic bridge to be in contact with each other.
5. The electric machine rotor of claim 1,
the circumferential profile of the rotor core is formed by connecting a plurality of groups of arc sections end to end, and each group of the arc sections comprises a first arc line, a second arc line and a third arc line which are connected in sequence.
6. The electric machine rotor of claim 5,
the centre of a circle of second circular arc line with the axle center of electric motor rotor's pivot sets up with one heart, first circular arc line and third circular arc line respectively with the second circular arc line is tangent formula level and smooth connection, and first circular arc line with the centre of a circle of third circular arc with the axle center is eccentric to be set up.
7. The electric machine rotor of claim 6,
for two adjacent groups of the arc sections, the first arc line of one of the two adjacent groups of the arc sections is connected with the third arc line of the other one of the two adjacent groups of the arc sections, and an included angle which is sunken towards the axis direction is formed at the connection position.
8. The electric machine rotor of claim 7,
on the first punching sheet, the third arc line and one end of the adjacent first magnetic steel groove define the first outer magnetic bridge, and the first arc line and the other end form the second outer magnetic bridge;
and on the second punching sheet, the first arc line and one end of the adjacent second magnetic steel groove define the first outer magnetic bridge, and the third arc line and the other end form the second outer magnetic bridge.
9. The electric machine rotor of claim 2,
the multi-section structure is a two-section structure and comprises an outer narrow part magnetic bridge structure and an outer wide part magnetic bridge structure.
10. The electric machine rotor of claim 9,
the outer narrow part magnetic bridge structure is formed by an outer edge arc section on the outer edge of the iron core and a first arc section structure which is concentric with the outer edge arc section on the first outer side magnetic bridge.
11. The electric machine rotor of claim 10,
the outer wide part magnetic bridge structure is formed by limiting a second arc section which is connected with the first arc section and is concave towards the inner side and a corresponding outer edge arc section.
12. The electric machine rotor of claim 11,
the first magnetic steel groove and the second magnetic steel groove are provided with protruding structures protruding into the grooves on the inner sides opposite to the second outer magnetic bridge, so that the two ends of the permanent magnet are limited by the second arc sections respectively.
13. The electric machine rotor of any of claims 1 to 12,
the first punching sheet and the second punching sheet are alternately stacked along the axial direction.
14. The electric machine rotor of any of claims 1 to 12,
the first punching sheets are stacked along the axial direction to form a first group of punching sheets, the second punching sheets are stacked along the axial direction to form a second group of punching sheets, and the first group of punching sheets and the second group of punching sheets are assembled along the axial direction in a fixed mode.
15. An electric machine, comprising:
an electric machine rotor as claimed in any one of claims 1 to 14;
and the motor stator is matched with the motor rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811277046.2A CN111130238B (en) | 2018-10-30 | 2018-10-30 | Motor rotor and motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811277046.2A CN111130238B (en) | 2018-10-30 | 2018-10-30 | Motor rotor and motor |
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| CN111130238A true CN111130238A (en) | 2020-05-08 |
| CN111130238B CN111130238B (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811277046.2A Active CN111130238B (en) | 2018-10-30 | 2018-10-30 | Motor rotor and motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4060873A1 (en) * | 2021-03-19 | 2022-09-21 | Siemens Aktiengesellschaft | Permanently magnetic synchronous motor |
| CN115811157A (en) * | 2021-09-10 | 2023-03-17 | 广东汉宇汽车配件有限公司 | Rotor and electric water pump using same |
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| EP4060873A1 (en) * | 2021-03-19 | 2022-09-21 | Siemens Aktiengesellschaft | Permanently magnetic synchronous motor |
| WO2022194819A1 (en) * | 2021-03-19 | 2022-09-22 | Siemens Aktiengesellschaft | Permanent magnet synchronous motor |
| CN115811157A (en) * | 2021-09-10 | 2023-03-17 | 广东汉宇汽车配件有限公司 | Rotor and electric water pump using same |
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|---|---|
| CN111130238B (en) | 2021-11-23 |
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