CN114094739B - Rotor punching sheet, rotor, motor and vehicle - Google Patents
Rotor punching sheet, rotor, motor and vehicle Download PDFInfo
- Publication number
- CN114094739B CN114094739B CN202010758130.7A CN202010758130A CN114094739B CN 114094739 B CN114094739 B CN 114094739B CN 202010758130 A CN202010758130 A CN 202010758130A CN 114094739 B CN114094739 B CN 114094739B
- Authority
- CN
- China
- Prior art keywords
- groove
- magnet
- rotor
- punching sheet
- magnetism isolating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—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]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- 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
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- 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 rotor punching sheet, a rotor, a motor and a vehicle. The magnet groove is arranged on the punching sheet body around the shaft hole. The magnet slots comprise a plurality of first magnet slots, and each first magnet slot in the plurality of first magnet slots extends along the radial direction of the punching sheet body. The magnetic isolation groove is arranged on the punching sheet body, and at least one part of the magnetic isolation groove is positioned on one side, close to the shaft hole, of the first magnet groove. The magnetism isolating body is arranged in the magnetism isolating groove. In the invention, the first magnet grooves extending along the radial direction of the punching sheet body can form different closed magnetic circuits, thereby improving a magnetic flux path and improving the utilization rate of the permanent magnet.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to a rotor punching sheet, a rotor, a motor and a vehicle.
Background
At present, the built-in permanent magnet synchronous motor can realize the improvement of torque density and the effective widening of the operation range of a constant power region due to the existence of reluctance torque. However, when the rotor in the motor rotates at a high speed, in order to ensure the structural strength, the magnetic bridges of the rotor near the axis of the rotor are often made wider, and the wider magnetic bridges cause leakage of magnetic flux at the position, so how to improve the structural strength of the rotor while reducing the leakage of magnetic flux becomes an urgent problem to be solved.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the present invention provides a rotor sheet.
A second aspect of the invention is to provide a rotor.
A third aspect of the invention provides an electric machine.
A fourth aspect of the invention is a vehicle.
In view of this, according to a first aspect of the present invention, there is provided a rotor punching sheet, which includes a punching sheet body, a shaft hole, a magnet groove, a magnetism isolating groove and a magnetism isolating body, wherein the shaft hole is opened on the punching sheet body. The magnet groove is arranged on the punching sheet body around the shaft hole. The magnet groove comprises a plurality of first magnet grooves, and each first magnet groove in the plurality of first magnet grooves extends along the radial direction of the punching sheet body. The magnetic isolation groove is arranged on the punching sheet body, and at least one part of the magnetic isolation groove is positioned on one side, close to the shaft hole, of the first magnet groove. The magnetism isolating body is arranged in the magnetism isolating groove.
The rotor punching sheet provided by the invention comprises a punching sheet body, wherein the shaft hole is formed in the punching sheet body, and the punching sheet body is made of silicon steel materials. Wherein, the silicon steel is silicon alloy steel with 1.0-4.5% of silicon content and less than 0.08% of carbon content. Silicon steel has the characteristics of high magnetic permeability, low coercive force, large resistivity and the like, so that the ratio of hysteresis loss to eddy current loss is small. The shaft hole is used for assembling a rotating shaft of the rotor. The magnetic slots are arranged on the punching sheet body around the shaft hole and used for assembling the permanent magnets of the rotor, and the number of the magnetic slots and the number of the permanent magnets are in one-to-one correspondence. The magnet groove includes a plurality of first magnet grooves, and each first magnet groove sets up on the towards piece body along the radial extension towards the piece body. A plurality of first magnet grooves are arranged on the punching sheet body along the circumferential interval of the punching sheet body, and then radial arrangement (spoke type arrangement mode) is formed so as to form a parallel magnetic circuit. That is to say, the permanent magnets in each first magnet slot can form different closed magnetic circuits, so that a magnetic flux path can be improved, the utilization rate of the permanent magnets of the motor with the rotor sheet is improved, namely the post-magnetizing saturation of the permanent magnets and the power density of the motor are improved, and key electromagnetic performance parameters such as no-load air gap magnetic flux density and no-load back electromotive force can also be improved, so that the overall performance of the motor is improved. The magnetism isolating groove is arranged on the punching sheet body, and at least one part of the magnetism isolating groove is positioned on one side of the first magnet groove close to the shaft hole, namely, the magnetism isolating groove is arranged on the punching sheet body close to the shaft hole more than the first magnet groove, so that a magnetic bridge structure between the first magnet groove and the shaft hole is narrow, and the magnetic leakage condition close to the shaft hole can be effectively reduced. The magnetic isolation body is arranged in the magnetic isolation groove and has non-magnetic conductivity, on one hand, the magnetic isolation body can enhance the overall structural strength of the rotor punching sheet, and the rotor punching sheet is prevented from being deformed or broken under the action of centrifugal force in a high-rotating-speed running state. On the other hand, because the magnetism isolating body improves the structural strength of the rotor punching sheet, the width of the magnetism isolating bridge can be designed to be narrower under the condition of meeting the requirement of the same structural stress, the magnetic leakage can be effectively reduced, and the power density of a motor with the rotor punching sheet is improved.
Specifically, as the magnetism isolating body is added into the magnetism isolating groove, the structural strength of the rotor punching sheet is increased, and the requirement on the width of the magnetism isolating bridge is reduced.
When the rotor punching sheet is not provided with the magnetism isolating body, the structural stress is mainly provided by the magnetism isolating bridge when the rotor punching sheet rotates at a high speed. In order to meet the structural stress requirement, the width of the inner magnetic bridge is 2.6mm.
However, if the magnetism isolating groove is provided only between the two magnet grooves, then in order to satisfy the structural stress requirement, the width of each of the two inner bridges located between the two magnet grooves and the magnetism isolating groove should be 1.3mm.
If the magnetism isolating body is added into the magnetism isolating groove, the structural stress of the rotor punching sheet is increased, and under the condition of meeting the same structural stress requirement, the width of an inner magnetic bridge formed between the two magnet grooves and the magnetism isolating groove can be narrower, namely the width of each inner magnetic bridge can be 0.5mm, and the magnetism isolating bridge is narrowed, so that the magnetic leakage is reduced.
In a possible design, further, the magnetism isolating groove comprises a first groove body, the first groove body is arranged on the punching sheet body, at least one part of the first groove body is located on one side, close to the shaft hole, of the first magnet groove, and the first groove body extends along the circumferential direction or the tangential direction of the punching sheet body.
In this design, the magnetism isolating groove includes first cell body, and first cell body setting is on the body of punching the piece and lie in one side that first magnet groove is close to the shaft hole, and first cell body is close to the shaft hole setting on the body of punching the piece for first magnet groove promptly to can make first cell body effectively reduce this department magnetic leakage condition. Further, the first groove body extends along the axial direction or the tangential direction of the punching sheet body. It should be noted that the first slot body may extend toward one side of the first magnet slot, and at this time, the cross sections of the first slot body and the first magnet slot are arranged like an L shape. Of course, the first slot body may extend towards two sides of the first magnet slot, and the cross sections of the first slot body and the first magnet slot are arranged like a T shape.
In a possible design, the magnetic isolation groove further comprises at least one second groove body, the at least one second groove body is arranged on the punching sheet body and is communicated with the first groove body, and each second groove body of the at least one second groove body extends along the radial direction of the punching sheet body.
In the design, the magnetism isolating groove further comprises at least one second groove body, each second groove body is arranged on the punching sheet body and communicated with the first groove body, and the second groove bodies extend along the radial direction of the punching sheet body. It is worth mentioning that the radial direction of the punching sheet body includes radially outwards and radially inwards, radially outwards means the direction towards the outer periphery edge of the punching sheet body, and radially inwards means the direction towards the shaft hole. The second channel may extend radially outward and/or the second channel may extend radially inward. When the second cell body is extended along the radial direction of the punching sheet body, the first cell body is extended along the axial direction or the tangential direction of the punching sheet body, therefore, a step structure can be constructed between the first cell body and the second cell body, when the magnetism isolating body is filled in the magnetism isolating groove (the first cell body and/or the second cell body), a more reliable limiting effect is formed between the magnetism isolating body and the magnetism isolating groove, when the rotor punching sheet runs at a high speed, the magnetism isolating body is pulled under the action of centrifugal force, a resisting effect can be generated, the middle part of the magnetism isolating body is prevented from being pulled to deform and fail, and therefore the structural strength of the rotor punching sheet is effectively enhanced. Specifically, the number of the second grooves may be 2 or 4.
In a possible design, further, the first groove body includes a middle section and a protruding section, and the middle section is arranged on the punching sheet body and located on one side of the first magnet groove close to the shaft hole. The protruding section is communicated with the middle section, and the radial width of the protruding section is greater than or equal to that of the middle section.
In this design, the interlude setting of first cell body is on the towards piece body, and the interlude is located one side that first magnet groove is close to the shaft hole. The convex section is communicated with the middle section, the radial width of the convex section is larger than or equal to that of the middle section, and a step structure is formed between the convex section and the middle section, so that the radial length of an interval magnetic bridge of adjacent magnetism isolating grooves can be increased, a magnetic circuit is improved, and magnetic leakage is reduced. When the magnetism isolating body is filled in the magnetism isolating groove (the first groove body), a more reliable limiting effect is formed between the magnetism isolating body and the magnetism isolating groove, when the rotor punching sheet operates at a high speed, the magnetism isolating body is pulled under the action of centrifugal force, a resisting effect can be generated, the magnetism isolating body is prevented from being pulled to deform and losing efficacy, and therefore the structural strength of the rotor punching sheet is effectively enhanced.
In a possible design, further, the second groove body comprises a connecting section and an extending section, and the connecting section is communicated with the first groove body. The extension section is communicated with the connecting end, and the maximum width of the extension section is greater than that of the connecting section.
In this design, the second tank includes a connecting section and an extension section, the connecting section being in communication with the first tank. The extension section is communicated with the connecting end, and the maximum width of the extension section is larger than that of the connecting section. The connecting section and the extending section can be constructed to form a step structure, when the magnetism isolating body is filled in the magnetism isolating groove (the second groove body), the magnetism isolating body can form a more reliable limiting effect with the magnetism isolating groove, when the rotor punching sheet runs at a high speed, the magnetism isolating body is pulled under the action of centrifugal force, a resisting effect can be generated, the magnetism isolating body is prevented from being pulled to deform and fail, and therefore the structural strength of the rotor punching sheet is effectively enhanced.
In one possible design, the cross section of the extension is triangular, trapezoidal or circular.
In the design, the cross section of the extension section is triangular, trapezoidal or circular arc, the cross section of the connecting section is rectangular, and the two meet the width dimension requirement, so that a step position is formed.
In a possible design, further, the rotor punching sheet further comprises a protruding tooth, the protruding tooth is connected with the punching sheet body, and the protruding tooth extends into the second groove body from the first groove body.
In this design, the protrusion tooth is connected with the punching sheet body and is located the magnetism isolating groove, the protrusion tooth back of the body extends (extends to the second cell body from first cell body), through set up the protrusion tooth in magnetism isolating groove, thereby can reduce the blank region in magnetism isolating groove, the protrusion tooth can cover part magnetism isolating groove promptly, and some magnetism isolating groove that is not covered by the protrusion tooth then is used for holding and places magnetism isolating body in addition, because the protrusion tooth makes through stamping forming with the punching sheet body, then can reduce the waste material volume of panel (silicon steel sheet) through setting up the protrusion tooth. That is, when the protruded tooth is not provided in the magnetism isolating groove, the plate material corresponding to the magnetism isolating groove part is punched as the waste material, and when the protruded tooth is provided in the magnetism isolating groove, the amount of the waste material is reduced, and the amount of the usage of the magnetism isolating body can be reduced by the protruded tooth.
In one possible design, further, the magnetic shielding body comprises at least one or a combination of the following: the supporting part and the connecting part are arranged on the base, wherein the hardness of the supporting part is greater than that of the connecting part.
In this design, the magnetic shield may be formed solely from a relatively stiff support. The magnetism isolating body can also be formed by a connecting piece with lower hardness compared with the supporting piece. Of course, the magnetic isolation body can also be formed by combining a supporting piece and a connecting piece. The supporting piece with higher hardness can provide strength support for the rotor punching sheet. When the connecting piece with lower hardness is adopted, the connecting piece can be better filled in the magnetism isolating groove, and the reliable connection between the magnetism isolating body and the punching sheet body is realized. When the magnetism isolating body is formed by combining the supporting piece and the connecting piece, the connection performance between the magnetism isolating body and the punching sheet body can be well realized by the supporting function provided by the magnetism isolating body for the punching sheet body.
Particularly, the supporting piece has the property of non-magnetic conductivity, and the supporting piece can improve the structural strength of the motor during high-speed operation. The supporting piece can be made of stainless steel, aluminum alloy, copper alloy and ceramic, has the advantages of no magnetic conductivity and high hardness, and is favorable for improving the structural strength of the rotor. The magnetic isolation body can also be prepared from a high-strength injection molding material, namely the connecting piece is prepared from an injection molding material which can comprise a polyethylene material, a polypropylene material and a polystyrene material. It is worth mentioning that the supporting piece and the connecting piece are both made of non-magnetic materials, so that a magnetic leakage magnetic circuit is not arranged at the position, close to the shaft hole, of the plurality of magnet grooves, magnetic leakage can be effectively inhibited, and torque is improved. Meanwhile, the connecting piece and the supporting piece can improve the structural strength of the rotor, and the high-speed operation requirement of the rotor is met.
In one possible design, further, the support piece in the isolation magnet is clamped between the punching sheet body and the protruding tooth and located in the second groove body.
In this design, when separating the magnet and adopting support piece alone, then support piece can press from both sides and establish between towards the piece body and the protrusion tooth, and support piece is located the second cell body, and when the rotor is towards high-speed rotatory towards the piece, centrifugal force that the second cell body received is great, to the great position setting of atress at this moment separating the magnet, support piece can provide reliable support for towards piece body, protrusion tooth, prevent that the piece body is pulled to warp and become invalid towards the piece body. When the magnetism isolating body is combined by the supporting piece and the connecting piece, the supporting piece is arranged in the second groove body, and the connecting piece is arranged in the first groove body.
In one possible design, further, the connecting piece in the isolation magnet is arranged in the first groove body.
In this design, when the connecting piece is adopted alone, the connecting piece can fill the first groove body and the second groove body; or the connecting piece partially fills the first slot body and the second slot body. Specifically, the connecting piece fills the second groove wall, and the connecting piece is filled in part of the first groove body, so that the connecting piece can form a whole.
In one possible design, further, the first magnet groove communicates with the magnetism isolating groove.
In the design, the magnetism isolating groove is communicated with the first magnet groove, and when the magnetism isolating body is injected into the magnetism isolating groove through an injection molding process, due to the flowing characteristic of injection molding materials in the injection molding process, the injection molding materials can be filled between the permanent magnet and the groove wall of the first magnet groove. That is, the magnetism isolating body can completely wrap the permanent magnet and is positioned in the first magnet groove and the magnetism isolating groove.
In a possible design, the magnet grooves further include two second magnet grooves, the two second magnet grooves being disposed between every adjacent two of the plurality of first magnet grooves, each of the two second magnet grooves having an inner end near the shaft hole and an outer end far from the shaft hole, the two inner ends being close to each other and the two outer ends being far from each other, respectively. Namely, the two second magnet grooves are arranged on the punching sheet body in a V shape.
In one possible design, the magnet grooves further include a third magnet groove disposed between every adjacent two of the plurality of first magnet grooves. The third magnet groove extends along the tangential direction of the punching sheet body, namely the third magnet groove is arranged on the punching sheet body in a straight line shape.
According to a second aspect of the invention, a rotor is provided, which comprises the rotor punching sheet provided by any one of the above designs.
The rotor provided by the invention comprises the rotor punching sheet provided by any design, so that the rotor punching sheet has all the beneficial effects of the rotor punching sheet, and the description is omitted.
In one possible design, further, the rotor comprises a rotor core and a plurality of permanent magnets, the rotor core is formed by stacking a plurality of rotor punching sheets, and the magnet slots of the plurality of rotor punching sheets penetrate along the axial direction of the rotor core to form the slots. The permanent magnets are arranged in the slots in a one-to-one correspondence.
In the design, the rotor comprises a rotor core and a plurality of permanent magnets, the rotor core is formed by laminating a plurality of rotor punching sheets, magnet slots of the plurality of rotor punching sheets penetrate through the rotor core along the axial direction of the rotor core to form slots, and one permanent magnet is inserted into one slot. The volume of the slot is larger than that of the permanent magnet, so that the assembly of the permanent magnet can be facilitated. When the volume of the slot is larger than that of the permanent magnet, at least one magnet groove is communicated with the magnetism isolating groove, so that in the process of injecting the high-strength injection molding material, the injection molding material can be filled in a gap between the magnet groove and the permanent magnet, the permanent magnet can be fixed, and the structural strength between the rotor punching sheet and the permanent magnet can be further improved.
In one possible design, further, the plurality of slots includes a first slot, and the first magnet slots of the plurality of rotor punching sheets form the first slot. The plurality of permanent magnets include a first permanent magnet inserted in the first slot. The width of the first permanent magnet is m, the maximum value of the radial extension length of the second groove body of the rotor punching sheet in the punching sheet body is h, and h is less than or equal to m/3.
In this design, the plurality of slots includes a first slot for fitting a first permanent magnet, the first magnet slot and the magnetism isolating slot being able to enclose a magnet area. At the moment, the width m of the first permanent magnet and the maximum value h of the radial extension length of the second groove body on the punching sheet body meet the relationship, so that the depth of the magnetic isolation groove (the second groove body) extending into the magnet area cannot be too large, and the magnetic circuit and the peak torque of the motor are further ensured.
According to a third aspect of the present invention there is provided an electrical machine comprising a rotor as provided in any of the above designs.
The motor provided by the invention comprises the rotor provided by any design, so that the motor has all the beneficial effects of the rotor, and the details are not repeated.
In one possible design, the electric machine further comprises a stator configured to form a mounting cavity, the rotor being disposed within the mounting cavity.
In this design, the electric machine includes a stator having a fitting cavity, and a rotor disposed within the fitting cavity and rotatable relative to the stator.
According to a fourth aspect of the present invention there is provided a vehicle comprising an electric machine as provided in any of the above designs.
The vehicle provided in one design of the invention comprises the motor provided in any one of the above designs, so that all the beneficial effects of the motor are achieved, and the details are not repeated herein.
It is worth mentioning that the vehicle may be a new energy automobile. The new energy automobile comprises a pure electric automobile, an extended range electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.
Further, the motor provided by any design can be used as a driving motor of a vehicle. In particular, the drive motor alone enables the functional device of the vehicle to be started. Alternatively, the driving motor can cooperate with other driving devices on the vehicle to realize the normal operation of functional devices on the vehicle. The functional device of the vehicle can be any one or any combination of the following: wheels, air conditioners, light assemblies, etc.
In one possible design, further, the vehicle includes a vehicle body, and the motor is mounted in the vehicle body.
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 structural diagram of a rotor sheet according to an embodiment of the invention;
FIG. 2 shows an enlarged partial view of the rotor sheet shown in FIG. 1 at A in one embodiment in accordance with the present invention;
FIG. 3 is a schematic structural diagram of a rotor sheet according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a rotor sheet according to another embodiment of the present invention;
FIG. 5 illustrates an enlarged view of a portion of the rotor plate shown in FIG. 4 at B in accordance with one embodiment of the present invention;
FIG. 6 is a schematic structural view of a rotor sheet according to yet another embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a rotor sheet according to yet another embodiment of the present invention;
fig. 8 shows a schematic structural diagram of a rotor sheet in a further embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 8 is:
1, punching a rotor sheet,
10, punching a sheet body, wherein the punching sheet body,
11 the shaft hole is arranged on the upper portion of the shaft,
12 magnet slots, 12a first magnet slot, 12b second magnet slot,
13 a magnetic-isolating groove is arranged on the upper surface of the magnetic-isolating groove,
131a first groove body, 131a middle section, 131b bulge section,
132 second channel, 132a connecting segment, 132b extending segment,
14 magnets, 141 supports, 142 connectors,
15 of the gear-tooth-shaped structure are protruded,
20 permanent magnet, 20a first permanent magnet.
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 sheet 1, a rotor, an electric machine, and a vehicle provided according to some embodiments of the present invention are described below with reference to fig. 1 to 8.
Example one
According to a first aspect of the present invention, a rotor punching sheet 1 is provided, as shown in fig. 1, fig. 3, fig. 4, and fig. 6 to fig. 8, the rotor punching sheet 1 includes a punching sheet body 10, a shaft hole 11, a magnet groove 12, a magnetism isolating groove 13, and a magnetism isolating body 14, wherein the shaft hole 11 is opened on the punching sheet body 10. The magnet groove 12 is provided on the punch body 10 around the shaft hole 11. The magnet groove 12 includes a plurality of first magnet grooves 12a, and each of the plurality of first magnet grooves 12a extends in a radial direction of the punch sheet body 10. The magnetic isolation groove 13 is arranged on the punching sheet body 10, and at least one part of the magnetic isolation groove 13 is positioned on one side of the first magnet groove 12a close to the shaft hole 11. The magnetism isolating body 14 is disposed in the magnetism isolating groove 13.
The rotor punching sheet 1 provided by the invention comprises a punching sheet body 10, wherein a shaft hole 11 is formed in the punching sheet body 10, and the punching sheet body 10 is made of a silicon steel material. Wherein, the silicon steel is silicon alloy steel with 1.0-4.5% of silicon content and less than 0.08% of carbon content. Silicon steel has the characteristics of high magnetic permeability, low coercive force, large resistivity and the like, so that the hysteresis loss and the eddy current loss are small. The shaft hole 11 is used for assembling a rotating shaft of the rotor. The magnet grooves 12 are arranged on the punching sheet body 10 around the shaft hole 11, the magnet grooves 12 are used for assembling the permanent magnets 20 of the rotor, and the number of the magnet grooves 12 is a plurality of permanent magnets 20 in one-to-one correspondence. The magnet slots 12 include a plurality of first magnet slots 12a, and each first magnet slot 12a is disposed on the punching sheet body 10 along a radial extension of the punching sheet body 10. The first magnet grooves 12a are arranged on the punching sheet body 10 at intervals along the circumferential direction of the punching sheet body 10, and then form spoke type arrangement (spoke type arrangement mode) to form a parallel magnetic circuit. That is to say, the permanent magnets 20 in each first magnet slot 12a can form different closed magnetic circuits, so that a magnetic flux path can be improved, and the utilization rate of the permanent magnets 20 of the motor with the rotor sheet 1 is improved, that is, the back magnetizing saturation of the permanent magnets 20 and the power density of the motor are improved, and key electromagnetic performance parameters such as no-load air gap magnetic flux density and no-load back electromotive force can also be improved, so that the overall performance of the motor is improved. The magnetism isolating groove 13 is arranged on the punching sheet body 10, and at least one part of the magnetism isolating groove 13 is positioned on one side of the first magnet groove 12a close to the shaft hole 11, that is to say, for the first magnet groove 12a, the magnetism isolating groove 13 is arranged on the punching sheet body 10 closer to the shaft hole 11, so that the magnetic bridge structure between the first magnet groove 12a and the shaft hole 11 is narrower, and the magnetic leakage condition close to the shaft hole 11 can be effectively reduced. The magnetism isolating groove 13 is internally provided with the magnetism isolating body 14, the magnetism isolating body 14 has non-magnetic conductivity, on one hand, the magnetism isolating body 14 can enhance the overall structural strength of the rotor sheet 1, and the rotor sheet 1 is prevented from deforming or breaking under the action of centrifugal force in a high-speed running state. On the other hand, because the magnetism isolating body improves the structural strength of the rotor punching sheet, the width of the magnetism isolating bridge can be designed to be narrower under the condition of meeting the requirement of the same structural stress, the magnetic leakage can be effectively reduced, and the power density of the motor with the rotor punching sheet 1 is improved.
Specifically, due to the addition of the magnetism isolating body 14 in the magnetism isolating groove 13, the structural strength of the rotor punching sheet 1 is increased, and at the moment, the requirement for the width of the magnetism isolating bridge is reduced.
When the rotor punching sheet 1 is not provided with the magnetism isolating body 14, structural stress is mainly provided by the magnetism isolating bridge when the rotor punching sheet 1 rotates at a high speed. In order to meet the structural stress requirement, the width of the inner magnetic bridge is 2.6mm.
However, if the magnetism isolating groove 13 is provided only between the two magnet grooves 12, then in order to satisfy the structural stress requirement, the width of each of the two inner bridges located between the two magnet grooves 12 and the magnetism isolating groove 13 should be 1.3mm.
If the magnetism-isolating body 14 is added into the magnetism-isolating groove 13, the structural stress of the rotor sheet 1 is increased, and under the condition of meeting the same structural stress requirement, the width of the inner magnetic bridges formed between the two magnet grooves 12 and the magnetism-isolating groove 13 can be narrower, that is, the width of each inner magnetic bridge can be 0.5mm, and the magnetism-isolating bridges are narrowed, so that the reduction of magnetic leakage is realized.
Specifically, since the magnetism isolating body 14 has a non-magnetic permeability, the leakage magnetism of the permanent magnet 20 located in the first magnet groove 12a passes only through the magnetic bridge between the adjacent first magnet grooves 12a, but since the magnetism isolating groove 13 is provided, the magnetic bridge width between the adjacent first magnet grooves 12a is narrower, the magnetic flux is more easily saturated, and therefore the leakage magnetism can be effectively suppressed, and the torque can be increased.
It is worth to be noted that the magnetism isolating groove 13 is an injection molding groove, and the magnetism isolating groove 13 penetrates through the punching sheet body 10 along the axial direction of the punching sheet body 10. Separate magnet 14 and be the injection molding body, pile up after forming rotor core when a plurality of rotor punching 1 promptly, can inject high strength plastic material in the groove of moulding plastics, thereby form the injection molding body (separate magnet 14), a plurality of rotor punching 1 can be fixed to the injection molding body, also can provide structural strength for rotor punching 1 simultaneously, make separate magnet 14 on a plurality of rotor punching 1 constitute a whole, and the injection molding body is not magnetic, can effectively reduce the magnetic leakage, improve the power density of motor, under the requirement of the same power grade, can effectively practice thrift the quantity of electricity magnetic part, reduce the cost of motor. It should be noted that the magnetism isolating body 14 may be filled in the magnetism isolating groove 13, or the magnetism isolating body 14 may be filled in only a part of the magnetism isolating groove 13, and may be adjusted according to actual conditions.
Further, as shown in fig. 2, the magnetism isolating groove 13 includes a first groove body 131, the first groove body 131 is disposed on the punching sheet body 10, at least a part of the first groove body 131 is located on one side of the first magnet groove 12a close to the shaft hole 11, and the first groove body 131 extends along the circumferential direction or the tangential direction of the punching sheet body 10.
In this embodiment, the magnetic isolation groove 13 includes a first groove body 131, the first groove body 131 is disposed on the punching sheet body 10 and is located on one side of the first magnet groove 12a close to the shaft hole 11, that is, the first groove body 131 is disposed on the punching sheet body 10 close to the shaft hole 11 relative to the first magnet groove 12a, so that the first groove body 131 can effectively reduce the magnetic leakage condition there. Further, the first slot body 131 extends along the axial direction or the tangential direction of the punching sheet body 10. It should be noted that the first slot 131 may extend toward one side of the first magnet slot 12a, and the cross sections of the first slot 131 and the first magnet slot 12a are arranged like an L shape. Of course, the first slot 131 may extend towards both sides of the first magnet slot 12a, and the cross sections of the first slot 131 and the first magnet slot 12a are arranged like a T.
Further, as shown in fig. 2, the magnetic separation groove 13 further includes at least one second groove body 132, the at least one second groove body 132 is disposed on the sheet punching body 10 and is communicated with the first groove body 131, and each second groove body 132 of the at least one second groove body 132 extends in a radial direction of the sheet punching body 10.
In this embodiment, the magnetism isolating groove 13 further includes at least one second groove body 132, each second groove body 132 is disposed on the punching sheet body 10 and is communicated with the first groove body 131, and the second groove bodies 132 extend along the radial direction of the punching sheet body 10. It is worth mentioning that the radial direction of the punching sheet body 10 includes a radial outward direction and a radial inward direction, the radial outward direction means a direction towards the outer peripheral edge of the punching sheet body 10, and the radial inward direction means a direction towards the shaft hole 11. The second slot 132 may extend radially outward and/or the second slot 132 may extend radially inward. When the second slot body 132 extends along the radial direction of the punching sheet body 10, the first slot body 131 extends along the axial direction or the tangential direction of the punching sheet body 10, therefore, a step structure can be formed between the first slot body 131 and the second slot body 132, when the magnetic isolation body 14 is filled in the magnetic isolation groove 13 (the first slot body 131 and/or the second slot body 132), a more reliable limiting effect is formed between the magnetic isolation body 14 and the magnetic isolation groove 13, when the rotor punching sheet 1 runs at a high speed, the magnetic isolation body 14 is pulled under the action of centrifugal force, a resisting effect can be generated, the middle part of the magnetic isolation body 14 is prevented from being pulled to deform and fail, and therefore the structural strength of the rotor punching sheet 1 is effectively enhanced. Specifically, the number of the second grooves 132 may be 2 or 4.
Further, as shown in fig. 2, the first groove body 131 includes an intermediate section 131a and a protruding section 131b, and the intermediate section 131a is disposed on the punching sheet body 10 and located on one side of the first magnet groove 12a close to the shaft hole 11. The protruding section 131b communicates with the middle section 131a, and the radial width of the protruding section 131b is equal to or greater than the radial width of the middle section 131 a.
In this embodiment, the intermediate section 131a of the first slot body 131 is disposed on the punching sheet body 10, and the intermediate section 131a is located on one side of the first magnet slot 12a close to the shaft hole 11. The protruding section 131b is communicated with the middle section 131a, and the radial width of the protruding section 131b is greater than or equal to the radial width of the middle section 131a, so that a step structure is formed between the protruding section 131b and the middle section 131a, thereby increasing the radial length of the magnetic bridge between adjacent magnetic isolation grooves 13, improving the magnetic path, and reducing the magnetic flux leakage. When the magnetism isolating body 14 is filled in the magnetism isolating groove 13 (the first groove body 131), a more reliable limiting effect is formed between the magnetism isolating body 14 and the magnetism isolating groove 13, when the rotor punching sheet 1 runs at a high speed, the magnetism isolating body 14 is pulled under the action of centrifugal force, a resisting effect can be generated, the magnetism isolating body 14 is prevented from being pulled and deformed to fail, and therefore the structural strength of the rotor punching sheet 1 is effectively enhanced.
Further, as shown in fig. 2, the second slot 132 includes a connecting section 132a and an extending section 132b, and the connecting section 132a is in communication with the first slot 131. The extension 132b communicates with the connection end, and the maximum width of the extension 132b is greater than the width of the connection section 132 a.
In this embodiment, the second slot 132 includes a connecting section 132a and an extending section 132b, and the connecting section 132a communicates with the first slot 131. The extension 132b communicates with the connection end, and the maximum width of the extension 132b is greater than that of the connection section 132 a. A step structure is formed between the connecting segment 132a and the extending segment 132b, when the magnetism isolating body 14 is filled in the magnetism isolating groove 13 (the second groove body 132), a more reliable limiting effect is formed between the magnetism isolating body 14 and the magnetism isolating groove 13, when the rotor punching sheet 1 runs at a high speed, the magnetism isolating body 14 is pulled under the action of centrifugal force, a resisting effect can be generated, the magnetism isolating body 14 is prevented from being pulled and deformed to fail, and therefore the structural strength of the rotor punching sheet 1 is effectively enhanced.
Further, as shown in fig. 2 and 5, the cross section of the extension 132b has a triangular, trapezoidal or circular arc shape.
In this embodiment, the cross section of the extension segment 132b is triangular, trapezoidal or circular arc, and the cross section of the connection segment 132a is rectangular, both of which satisfy the width dimension requirement, so as to form a step.
Example two
Different from the foregoing embodiment, the rotor punching sheet 1 in the present embodiment further includes a protruding tooth 15, as shown in fig. 4, 5, 7 and 8, the protruding tooth 15 is connected to the punching sheet body 10, and the protruding tooth 15 extends from the first slot 131 into the second slot 132.
In this embodiment, protruding tooth 15 is connected and is located magnetism trap 13 with punching sheet body 10, protruding tooth 15 deviates from shaft hole 11 and extends (extends to second cell body 132 from first cell body 131), through set up protruding tooth 15 in magnetism trap 13, thereby can reduce magnetism trap 13's blank area, protruding tooth 15 can cover partly magnetism trap 13 promptly, and some magnetism trap 13 that is not covered by protruding tooth 15 then is used for holding and places magnetism trap 14, because protruding tooth 15 makes through stamping forming with punching sheet body 10, then can reduce the waste material volume of panel (silicon steel sheet) through setting up protruding tooth 15. That is, when the protrusion 15 is not provided in the magnetism isolating groove 13, a portion of the plate material corresponding to the magnetism isolating groove 13 is punched out as scrap, and when the protrusion 15 is provided in the magnetism isolating groove 13, the amount of scrap is reduced, and the protrusion 15 is provided to reduce the amount of the magnetism isolating body 14.
EXAMPLE III
Unlike the previous embodiments, the specific structure of the magnetism isolating body 14 is explained in the present embodiment, and further, as shown in fig. 3, 4, and 6 to 8, the magnetism isolating body 14 includes at least one or a combination of the following: a support member 141 and a connecting member 142, wherein the hardness of the support member 141 is greater than that of the connecting member 142.
In this design, the isolation magnet 14 can be formed by using the support 141 having a high hardness alone. The isolation magnet 14 may also be constructed solely using a connector 142 having a lower stiffness than the support. Of course, the isolation magnet 14 may be formed by combining the support member 141 and the connection member 142. The support member 141 with higher hardness can provide strength support for the rotor punching sheet 1. When the connecting piece 142 with lower hardness is adopted, the connecting piece 142 can be better filled in the magnetism isolating groove 13, and the reliable connection between the magnetism isolating body 14 and the punching sheet body 10 is realized. When the magnetism isolating body 14 is formed by combining the supporting piece 141 and the connecting piece 142, the connection performance between the magnetism isolating body 14 and the punching sheet body 10 can be well realized, and the supporting function provided by the magnetism isolating body 14 for the punching sheet body 10 can be well realized.
Specifically, the support member 141 has a non-magnetic property, and the support member 141 can improve structural strength when the motor operates at a high speed. The supporting member 141 may be made of stainless steel, aluminum alloy, copper alloy, or ceramic, and has the advantages of non-magnetic property and high hardness, which is beneficial to improving the structural strength of the rotor. The isolation magnet 14 may also be made of a high-strength injection molding material, that is, the connecting member 142 is made of an injection molding material, and the injection molding material may include a polyethylene material, a polypropylene material, and a polystyrene material. It should be noted that, the supporting member 141 and the connecting member 142 are both made of non-magnetic materials, so that there is no magnetic flux leakage path near the shaft hole 11 in the plurality of magnet slots 12, which can effectively suppress magnetic flux leakage and improve torque. Meanwhile, the connecting member 142 and the supporting member 141 can both improve the structural strength of the rotor, and meet the high-speed operation requirement of the rotor.
Further, as shown in fig. 7 and 8, the support member 141 in the magnetism isolating body 14 is sandwiched between the sheet punching body 10 and the protruding tooth 15 and is located in the second groove 132.
In this embodiment, when the magnetism isolating body 14 separately adopts the support member 141, then the support member 141 can be clamped between the punching sheet body 10 and the protruding tooth 15, the support member 141 is located in the second groove 132, when the rotor punching sheet 1 rotates at a high speed, the centrifugal force received by the second groove 132 is large, to the position with a large stress, the magnetism isolating body 14 is arranged, the support member 141 can provide reliable support for the punching sheet body 10 and the protruding tooth 15, and the protruding tooth 15 and the punching sheet body 10 are prevented from being pulled and deformed to fail. When the isolation magnet 14 is used by combining the support member 141 and the connection member 142, the support member 141 is disposed in the second slot body 132, and the connection member 142 is disposed in the first slot body 131.
It should be noted that the supporting member 141 is in surface contact with the punching sheet body 10, and the supporting member 141 is also in surface contact with the protruding teeth 15, so that the contact area between the supporting member 141 and the punching sheet body 10, and between the supporting member 141 and the protruding teeth 15 can be increased, and when the rotor punching sheet 1 runs at a high speed, the centrifugal force can be better dispersed through the surface-to-surface contact, and the phenomenon that the rotor punching sheet is pulled and deformed due to local stress, and the failure is caused is avoided. Meanwhile, the structural strength and the driving stability of the rotor punching sheet 1 can be improved.
Further, as shown in fig. 3, 4 and 8, the connecting piece 142 in the magnetism insulating body 14 is disposed in the first groove 131.
In this embodiment, when the connecting member 142 is used alone, the connecting member 142 may fill the first and second slots 131 and 132; or the connecting member 142 partially fills the first and second slots 131 and 132. Specifically, the connecting member 142 fills the second groove wall, and the connecting member 142 fills a portion of the first groove 131, so that the connecting member 142 can form a whole.
Example four
In the present embodiment, the number and arrangement of the magnet grooves are explained, and further, as shown in fig. 1 to 8, the first magnet groove 12a communicates with the magnetism isolating groove 13.
In this embodiment, the magnetism isolating groove 13 communicates with the first magnet groove 12a, and when the magnetism isolating body 14 is injected into the magnetism isolating groove 13 through an injection molding process, the injection molding material can be filled between the permanent magnet 20 and the groove wall of the first magnet groove 12a due to the flow characteristics of the injection molding material during the injection molding process. That is, the magnetism isolating body 14 can completely wrap the permanent magnet 20 and be located in the first magnet groove 12a and the magnetism isolating groove 13.
In a possible embodiment, further, as shown in fig. 1, the magnet grooves 12 further include two second magnet grooves 12b, the two second magnet grooves 12b being provided between every adjacent two of the plurality of first magnet grooves 12a, each of the two second magnet grooves 12b having an inner end close to the shaft hole 11 and an outer end far from the shaft hole 11, the inner ends being close to each other and the outer ends being far from each other, respectively. Namely, the two second magnet grooves 12b are arranged on the punching sheet body 10 in a V shape.
Further, the magnet grooves 12 further include a third magnet groove (not shown in the drawings) provided between every adjacent two of the plurality of first magnet grooves 12 a. The third magnet groove extends along the tangential direction of the punching sheet body 10, that is, the third magnet groove is arranged on the punching sheet body 10 in a straight line shape.
EXAMPLE five
According to a second aspect of the present invention, a rotor is provided, which includes the rotor sheet 1 provided in any one of the above embodiments.
The rotor provided by the invention comprises the rotor punching sheet 1 provided by any one of the embodiments, so that all the beneficial effects of the rotor punching sheet 1 are achieved, and the description is omitted.
Further, the rotor comprises a rotor core and a plurality of permanent magnets 20, the rotor core is formed by stacking a plurality of rotor sheets 1, and the magnet slots 12 of the plurality of rotor sheets 1 penetrate along the axial direction of the rotor core to form slots. The plurality of permanent magnets 20 are disposed in the plurality of slots in a one-to-one correspondence.
In this embodiment, the rotor includes a rotor core and a plurality of permanent magnets 20, and the plurality of rotor sheets 1 are laminated to form the rotor core, wherein the magnet slots 12 of the plurality of rotor sheets 1 penetrate along the axial direction of the rotor core to form slots, and one permanent magnet 20 is inserted into one slot. The volume of the slot is larger than that of the permanent magnet 20 so that the assembly of the permanent magnet 20 can be facilitated. When the volume of the slot is larger than that of the permanent magnet 20, and at least one magnet groove 12 is communicated with the magnetism isolating groove 13, then, in the process of injecting the high-strength injection molding material, the injection molding material can be filled in the gap between the magnet groove 12 and the permanent magnet 20, and the permanent magnet can be fixed, so that the structural strength between the rotor punching sheet 1 and the permanent magnet 20 can be further improved.
Further, the plurality of slots includes a first slot, and the first magnet slots 12a of the plurality of rotor sheets 1 form the first slot. The plurality of permanent magnets 20 includes a first permanent magnet 20a, and the first permanent magnet 20a is inserted into the first slot. The width of the first permanent magnet 20a is m, the maximum value of the radial extension length of the second groove 132 of the rotor punching sheet 1 in the punching sheet body 10 is h, and h is less than or equal to m/3.
In this embodiment, the plurality of slots includes a first slot for fitting the first permanent magnet 20a, and the first magnet slot 12a and the magnetism isolating slot 13 can enclose to form a magnet region. At this time, the width m of the first permanent magnet 20a and the maximum value h of the radial extension length of the second slot body 132 of the punching sheet body 10 satisfy the above relationship, so that the depth of the magnetic isolation slot 13 (the second slot body 132) extending into the magnet area is not too large, and the magnetic circuit and the peak torque of the motor are ensured.
Example six
According to a third aspect of the present invention, there is provided an electrical machine comprising a rotor as provided in any of the above embodiments.
The motor provided by the invention comprises the rotor provided by any one of the embodiments, so that the motor has all the beneficial effects of the rotor, and the details are not repeated.
In one possible embodiment, further, the electric machine includes a stator configured to form a mounting cavity, the rotor being disposed within the mounting cavity.
In this embodiment, the motor includes a stator having a mounting cavity, and a rotor disposed within the mounting cavity and rotatable relative to the stator.
EXAMPLE seven
According to a fourth aspect of the present invention, there is provided a vehicle including the motor provided in any one of the above embodiments.
The vehicle provided by one embodiment of the invention comprises the motor provided by any one of the embodiments, so that all the beneficial effects of the motor are achieved, and the details are not repeated.
It is worth mentioning that the vehicle may be a new energy automobile. The new energy automobile comprises a pure electric automobile, an extended range electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.
Further, the motor provided by the above embodiment can be used as a driving motor of a vehicle. In particular, the drive motor alone enables the functional device of the vehicle to be started. Alternatively, the driving motor can cooperate with other driving devices on the vehicle to realize the normal operation of functional devices on the vehicle. The functional device of the vehicle can be any one or any combination of the following: wheels, air conditioners, light assemblies, etc.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are used broadly and should be construed to include, for example, "connected" may be a fixed connection, a detachable 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 according to specific situations by those of ordinary skill in the art.
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 description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 (10)
1. A rotor punching sheet is characterized by comprising:
punching a sheet body;
the shaft hole is formed in the punching sheet body;
the magnet groove is arranged on the punching sheet body around the shaft hole;
the magnet slots comprise a plurality of first magnet slots, and each first magnet slot in the plurality of first magnet slots extends along the radial direction of the punching sheet body;
the magnetic isolation groove is arranged on the punching sheet body, and at least one part of the magnetic isolation groove is positioned on one side of the first magnet groove, which is close to the shaft hole;
the magnetism isolating body is arranged in the magnetism isolating groove;
the magnetism isolating groove comprises:
at least one part of the first groove body is positioned on one side of the first magnet groove close to the shaft hole;
the at least one second groove body is communicated with the first groove body, and each second groove body of the at least one second groove body extends along the radial direction of the punching sheet body;
the rotor punching sheet further comprises:
the protruding teeth are connected with the punching sheet body and extend into the second groove body from the first groove body;
the magnetism isolating body comprises at least one or a combination of the following components: the hardness of the supporting part is greater than that of the connecting part;
the supporting piece in the magnet isolating body is clamped between the punching sheet body and the protruding teeth and is positioned in the second groove body;
the connecting piece in the magnetism isolating body is arranged in the first groove body.
2. The rotor sheet as recited in claim 1, wherein the first slot body comprises:
the middle section is arranged on the punching sheet body and is positioned on one side, close to the shaft hole, of the first magnet groove;
the protruding section is communicated with the middle section, and the radial width of the protruding section is greater than or equal to that of the middle section.
3. The rotor sheet as recited in claim 1, wherein the second slot body comprises:
the connecting section is communicated with the first groove body;
the extension section is communicated with the connecting section, and the maximum width of the extension section is larger than that of the connecting section.
4. The rotor sheet as recited in claim 1,
the supporting piece is a metal piece or a ceramic piece;
the connecting piece is composed of at least one of the following components: polyethylene, polypropylene, polystyrene.
5. The rotor sheet according to any one of claims 1 to 3,
the first magnet groove is communicated with the magnetism isolating groove.
6. The rotor sheet according to any one of claims 1 to 3, wherein the magnet slot further comprises:
two second magnet grooves provided between every adjacent two of the plurality of first magnet grooves, each of the two second magnet grooves having an inner end close to the shaft hole and an outer end far from the shaft hole, the inner ends being close to each other and the outer ends being far from each other, respectively; or
A third magnet groove disposed between every adjacent two of the plurality of first magnet grooves.
7. A rotor for an electric machine, the rotor comprising:
a rotor core formed by stacking a plurality of rotor sheets as claimed in any one of claims 1 to 6, wherein the magnet slots of the plurality of rotor sheets penetrate along the axial direction of the rotor core to form slots;
the permanent magnets are arranged in the slots in a one-to-one correspondence mode.
8. The rotor of claim 7,
the plurality of slots include:
the first slots are formed by the first magnet grooves of the rotor punching sheets;
the plurality of permanent magnets includes:
the first permanent magnet is inserted into the first slot;
the width of the first permanent magnet is m, the maximum value of the radial extension length of the second groove body of the rotor punching sheet in the punching sheet body is h, and h is less than or equal to m/3.
9. An electric machine, comprising:
a stator configured to form a fitting cavity; and
a rotor according to claim 7 or 8, disposed within the assembly cavity.
10. A vehicle, characterized by comprising:
a vehicle body; and
the motor of claim 9, said motor being mounted within said body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010758130.7A CN114094739B (en) | 2020-07-31 | 2020-07-31 | Rotor punching sheet, rotor, motor and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010758130.7A CN114094739B (en) | 2020-07-31 | 2020-07-31 | Rotor punching sheet, rotor, motor and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114094739A CN114094739A (en) | 2022-02-25 |
| CN114094739B true CN114094739B (en) | 2022-11-25 |
Family
ID=80295222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010758130.7A Active CN114094739B (en) | 2020-07-31 | 2020-07-31 | Rotor punching sheet, rotor, motor and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114094739B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2403109A2 (en) * | 2010-06-29 | 2012-01-04 | Schaeffler Technologies AG & Co. KG | Magnetic assembly, in particular for an electric machine and and method for producing an assembly |
| WO2017153061A1 (en) * | 2016-03-08 | 2017-09-14 | Robert Bosch Gmbh | Electric machine having high rotational-speed resistance |
| CN107834730A (en) * | 2017-11-01 | 2018-03-23 | 莱克电气股份有限公司 | Embedded permanent magnet synchronous motor rotor core |
| CN208835852U (en) * | 2018-08-15 | 2019-05-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor and magneto |
| CN110544997A (en) * | 2018-05-29 | 2019-12-06 | 华为技术有限公司 | motor rotor device and motor |
-
2020
- 2020-07-31 CN CN202010758130.7A patent/CN114094739B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2403109A2 (en) * | 2010-06-29 | 2012-01-04 | Schaeffler Technologies AG & Co. KG | Magnetic assembly, in particular for an electric machine and and method for producing an assembly |
| WO2017153061A1 (en) * | 2016-03-08 | 2017-09-14 | Robert Bosch Gmbh | Electric machine having high rotational-speed resistance |
| CN107834730A (en) * | 2017-11-01 | 2018-03-23 | 莱克电气股份有限公司 | Embedded permanent magnet synchronous motor rotor core |
| CN110544997A (en) * | 2018-05-29 | 2019-12-06 | 华为技术有限公司 | motor rotor device and motor |
| CN208835852U (en) * | 2018-08-15 | 2019-05-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor and magneto |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114094739A (en) | 2022-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8040010B2 (en) | Permanent magnet type generator and hybrid vehicle using the same | |
| CN201352753Y (en) | Novel internal permanent magnet synchronous motor | |
| CN201813289U (en) | Permanent magnet synchronous motor for vehicle | |
| CN105119396A (en) | Mixed laminated stator core and the application thereof to remanufacturing a power motor | |
| CN114094739B (en) | Rotor punching sheet, rotor, motor and vehicle | |
| CN114069920B (en) | Rotor punching sheet, rotor, motor and vehicle | |
| CN114094740B (en) | Rotor punching sheet, rotor, motor and vehicle | |
| CN217469587U (en) | Rotor assembly and motor | |
| CN114069921B (en) | Rotor punching sheet, rotor core, rotor, motor and vehicle | |
| CN212726608U (en) | Rotor punching sheet, rotor core, rotor, motor and vehicle | |
| CN110518725B (en) | Mixed permanent magnet type permanent magnet synchronous reluctance motor rotor structure for electric automobile | |
| CN115001177A (en) | Rotor assembly and motor | |
| CN110620452A (en) | Rotor, motor and compressor | |
| US12021414B2 (en) | Rotor, electric motor and compressor | |
| CN211701634U (en) | Composite permanent magnet synchronous motor stator | |
| CN114069919A (en) | Rotor punching sheet, rotor core, rotor, motor and vehicle | |
| CN113659746A (en) | Rotor punching sheet group, rotor iron core, rotor and motor | |
| CN219801998U (en) | Rotor structure and motor | |
| CN219801999U (en) | Rotor structure and motor | |
| CN219802135U (en) | Permanent magnet auxiliary synchronous reluctance motor | |
| CN219801997U (en) | Rotor structure and motor | |
| CN111682670A (en) | Electric automobile, permanent-magnet machine and mixed rotor punching thereof | |
| CN220022432U (en) | Rotor structure and motor | |
| CN218633491U (en) | Motor, rotor thereof and vehicle | |
| CN112003399A (en) | Rotor, motor, compressor, air conditioner and vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221202 Address after: 246008 floor 3, building B1, Binjiang New Area incubation center phase I, Chuangye Road, Anqing Economic and Technological Development Zone, Anhui Province Patentee after: Anqing Weiling Auto Parts Co.,Ltd. Patentee after: Anhui Weiling Auto Parts Co.,Ltd. Patentee after: GUANGDONG WELLING AUTO PARTS Co.,Ltd. Address before: No. 418, Caihong Road, high tech Zone, Hefei City, Anhui Province 230000 Patentee before: Anhui Weiling Auto Parts Co.,Ltd. Patentee before: GUANGDONG WELLING AUTO PARTS Co.,Ltd. |
|
| TR01 | Transfer of patent right |