CN108390483B - Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile - Google Patents
Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile Download PDFInfo
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- CN108390483B CN108390483B CN201810219855.1A CN201810219855A CN108390483B CN 108390483 B CN108390483 B CN 108390483B CN 201810219855 A CN201810219855 A CN 201810219855A CN 108390483 B CN108390483 B CN 108390483B
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- permanent magnet
- protrusion
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- layer permanent
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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]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention provides a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric automobile. The rotor body is provided with a permanent magnet slot group and a rotating shaft hole, and the permanent magnet slot group comprises an outer layer permanent magnet slot. The point buckling assembly comprises a first buckling point and a second buckling point, one of the first buckling point and the second buckling point is arranged on a first side wall, close to a straight shaft of the rotor body, of the outer permanent magnet groove, the other of the first buckling point and the second buckling point is arranged on a second side wall, opposite to the first side wall, of the outer permanent magnet groove, the first buckling point and the second buckling point are arranged in a staggered mode, and a first limiting space is formed between the first buckling point and the second buckling point. Through two knot point dislocation sets in outer permanent magnet groove on two lateral walls for the position connecting line of two knot points sets up along the permanent magnet diagonal direction that sets up in outer permanent magnet inslot, makes this permanent magnet when receiving the vibration, reaches the effect of reinforcing permanent magnet stability.
Description
Technical Field
The invention relates to the technical field of motor equipment, in particular to a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric automobile.
Background
Compared with a surface-mounted permanent magnet motor, the surface-mounted permanent magnet motor has the advantages of simple process, reliable structure and the like, and a permanent magnet of the surface-mounted permanent magnet motor is represented by being adhered to the outside of an iron core through high-strength glue and is wrapped with a steel sleeve or a carbon fiber sleeve. Once the rotor is assembled, there is no movement. And the permanent magnet of the built-in permanent magnet motor is only plugged in the permanent magnet groove, and no constraint of external force application fixation exists. In some environments with violent vibration, the micro gap of the permanent magnet in the permanent magnet groove can provide space for micro vibration and micro displacement of the permanent magnet, and long-time vibration causes the friction between the surface of the permanent magnet and the permanent magnet groove, damages the surface of the permanent magnet, and even powdering.
Disclosure of Invention
The invention mainly aims to provide a rotor structure, a permanent magnet auxiliary synchronous reluctance motor and an electric automobile, and aims to solve the problem that in the prior art, a permanent magnet is not stably fixed in a permanent magnet groove.
In order to achieve the above object, according to one aspect of the present invention, there is provided a rotor structure comprising: the rotor comprises a rotor body, wherein a permanent magnet groove group and a rotating shaft hole are arranged on the rotor body, and the permanent magnet groove group comprises an outer layer permanent magnet groove; the first buckling point component comprises a first buckling point and a second buckling point, one of the first buckling point and the second buckling point is arranged on a first side wall, close to a straight shaft of the rotor body, of the outer permanent magnet groove, the other of the first buckling point and the second buckling point is arranged on a second side wall, opposite to the first side wall, of the outer permanent magnet groove, the first buckling point and the second buckling point are arranged in a staggered mode, and a first limiting space is formed between the first buckling point and the second buckling point.
Furthermore, the first buckling point is arranged on the first side wall and is a first protrusion, the first protrusion is provided with a first edge, the first end of the first edge is connected with the first side wall and forms a first limiting angle, and the second end of the first edge extends towards the second side wall.
Further, the first protrusion further has a second edge, and a first end of the second edge is connected to a second end of the first edge and extends toward the outer edge of the rotor body and gradually gets away from the second sidewall until the second end of the second edge intersects with the first sidewall.
Further, first arch still has second limit and third limit, and the first end on second limit is connected and has the contained angle with the second end on first limit, and the second end on second limit extends towards the outer fringe of rotor body, and the first end on third limit is connected and has the contained angle with the second end on second limit, and the second end and the first side wall of third limit are connected.
Furthermore, the second buckling point is arranged on the second side wall and close to the rotating shaft hole of the rotor body, the second buckling point is a second protrusion, the second protrusion is provided with a fourth edge opposite to the first edge, the first end of the fourth edge is connected with the second side wall and is provided with a second limiting angle, the second limiting angle is equal to or unequal to the first limiting angle, and a first limiting space is formed between the first edge and the fourth edge.
Further, the first dotting subassembly is two, and outer permanent magnet groove includes: one of the two first buckling point assemblies is arranged on the first outer layer permanent magnet groove section; the outer layer of permanent magnet groove section of second, first outer layer of permanent magnet groove section and the outer layer of permanent magnet groove section of second have the distance to set up and lie in the rotor body both sides that are the straight axis along the radial direction of rotor body, and the geometric centre line of the length direction of first outer layer of permanent magnet groove section has the contained angle with the extension line of the geometric centre line of the length direction of the outer layer of permanent magnet groove section of second, and another in two first knot point subassemblies sets up on the outer layer of permanent magnet groove section of second.
Further, the first dotting subassembly is two, and outer permanent magnet groove includes: the first end of the first outer layer permanent magnet groove section extends towards the rotating shaft hole, the second end of the first outer layer permanent magnet groove section extends towards the outer edge of the rotor body and is gradually far away from the straight shaft of the rotor body, and one of the two first buckling point assemblies is arranged on the first outer layer permanent magnet groove section; the first end of the second outer layer permanent magnet groove section extends towards the rotating shaft hole and is communicated with the first end of the first outer layer permanent magnet groove section, the second end of the second outer layer permanent magnet groove section extends towards the outer edge of the rotor body and is gradually far away from the straight shaft, and the other of the two first buckling point assemblies is arranged on the second outer layer permanent magnet groove section.
Further, the permanent magnet slot group further includes: the inner permanent magnet groove comprises a first inner permanent magnet groove section, a second inner permanent magnet groove section and a third inner permanent magnet groove section which are sequentially arranged; first inlayer permanent magnet groove section, second inlayer permanent magnet groove section and third inlayer permanent magnet groove section communicate in proper order in order to form the opening towards the U-shaped structure of rotor body's outer border, perhaps, first inlayer permanent magnet groove section, second inlayer permanent magnet groove section and third inlayer permanent magnet groove section set up at intervals in proper order, are formed with between two adjacent in first inlayer permanent magnet groove section, second inlayer permanent magnet groove section and the third inlayer permanent magnet groove section and separate the magnetic bridge.
Further, the rotor structure further comprises a second fastening point component, the second fastening point component comprises a third protrusion, and the third protrusion is arranged on a third side wall, far away from the straight shaft of the rotor body, of the first inner layer permanent magnet groove section.
Further, the second buckling point assembly further comprises a fourth protrusion, the fourth protrusion is arranged on a fourth side wall, opposite to the third side wall, of the first inner layer permanent magnet groove section, and a second limiting space is formed between the third protrusion and the fourth protrusion.
Further, the rotor structure further comprises a third buckling point assembly, the third buckling point assembly comprises a fifth bulge, and the fifth bulge is arranged on the side wall of the second inner layer permanent magnet groove section, which is far away from one side of the rotating shaft hole.
Furthermore, the third buckling point assembly further comprises a sixth bulge, the sixth bulge is arranged on the groove section of the second inner layer permanent magnet and is positioned on the same side wall with the fifth bulge, and a third limiting space is formed between the fifth bulge and the sixth bulge.
Further, the rotor structure further comprises a fourth fastening point component, the fourth fastening point component comprises a sixth protrusion, and the sixth protrusion is arranged on a fifth side wall of the third inner layer permanent magnet groove section, which is far away from one side of the straight shaft of the rotor body.
Further, the fourth trip point component further comprises a seventh protrusion, the seventh protrusion is arranged on a sixth side wall of the third inner layer permanent magnet groove section, which is opposite to the fifth side wall, or the seventh protrusion is arranged on a side wall of the third inner layer permanent magnet groove section, which is close to the rotating shaft hole, and a fourth limit space is formed between the sixth protrusion and the seventh protrusion.
Further, first bellied first end is connected with first side, and first bellied second end extends towards the second lateral wall and is close to pivot hole department gradually and sets up, and/or, the bellied first end of second is connected with the second lateral wall, and the bellied second end of second is connected towards first lateral wall and is kept away from the setting of pivot hole gradually.
Further, rotor structure still includes the permanent magnet, has seted up spacing breach on the permanent magnet, and the permanent magnet includes: the outer permanent magnet is arranged in the outer permanent magnet groove, and the limiting notch is formed in at least one end of the outer permanent magnet; the inner layer permanent magnet is arranged in the inner layer permanent magnet groove, and the limiting notch is arranged on at least one end of the inner layer permanent magnet.
Further, the permanent magnet includes: permanent magnet body, permanent magnet body's at least one serve including the first surface, second surface and the third surface that connect gradually, the junction on first surface and second surface forms spacing breach, and the first surface has contained angle B with the plane that is close to the lateral wall place on first surface of permanent magnet body, and the lateral wall that is close to the third surface of third surface and permanent magnet body has contained angle A, and wherein, B is not equal to A, perhaps, A + B is 180.
Further, the connecting line of the first buckling point and the second buckling point passes through the gravity center of the outer layer permanent magnet in the outer layer permanent magnet groove, and/or the connecting line of the third protrusion and the fourth protrusion passes through the gravity center of the inner layer permanent magnet in the inner layer permanent magnet groove.
Further, the inner layer permanent magnet slots are at least two layers.
According to another aspect of the present invention, there is provided a permanent magnet assisted synchronous reluctance machine comprising a rotor structure as described above.
According to another aspect of the present invention, an electric vehicle is provided, which includes a rotor structure, and the rotor structure is the above-mentioned rotor structure.
By applying the technical scheme of the invention, the two buckling points in the outer layer permanent magnet groove are arranged on the two side walls in a staggered manner, so that the position connecting line of the two buckling points is arranged along the diagonal direction of the permanent magnet arranged in the outer layer permanent magnet groove, and the permanent magnet achieves the effect of enhancing the stability of the permanent magnet when being vibrated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of a first embodiment of a rotor structure according to the invention;
FIG. 2 shows a schematic cross-sectional structural view of a second embodiment of a rotor structure according to the present invention;
fig. 3 shows a schematic structural view of a third embodiment of a rotor structure according to the invention;
FIG. 4 shows a schematic structural view of a fourth embodiment of a rotor structure according to the invention;
FIG. 5 shows a schematic cross-sectional structural view of an embodiment five of a rotor structure according to the present invention;
FIG. 6 shows a cross-sectional structural schematic of an embodiment six of a rotor structure according to the present invention;
fig. 7 shows a schematic structural view of a first embodiment of the permanent magnets of the rotor structure according to the invention;
fig. 8 shows a schematic structural view of a second embodiment of the permanent magnets of the rotor structure according to the invention;
fig. 9 shows a schematic structural view of an embodiment seven of a rotor structure according to the invention;
fig. 10 shows a schematic structural view of an embodiment eight of the rotor structure according to the invention;
FIG. 11 illustrates a schematic structural view of an embodiment of a fastening point assembly of a rotor structure according to the present invention;
fig. 12 shows a schematic structural view of another embodiment of a fastening point assembly of a rotor structure according to the present invention.
Wherein the figures include the following reference numerals:
10. a rotor body; 13. hollowing out holes; 14. a rotating shaft hole;
11. an outer permanent magnet slot; 111. a first outer permanent magnet slot segment; 112. a second outer layer permanent magnet slot section;
12. an inner permanent magnet slot; 121. a first inner permanent magnet slot segment; 122. a second inner permanent magnet slot section; 123. a third inner permanent magnet slot section;
20. an outer permanent magnet; 30. an inner permanent magnet;
40. a limiting notch; 41. a first surface; 42. a second surface; 43. a third surface;
50. a first pinch point assembly; 51. a first buckling point; 511. a first side; 512. a second edge; 513. a third side;
52. a second fastening point; 521. a fourth side;
60. a second pinch point assembly; 61. a third protrusion; 62. a fourth protrusion;
70. a third pinch point assembly; 71. a fifth projection; 72. a sixth projection;
80. a fourth trip point assembly; 81. a seventh projection; 82. and an eighth bump.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 12, according to an embodiment of the present invention, a rotor structure is provided.
Specifically, the rotor structure includes a rotor body 10 and a first fastening point assembly 50. The rotor body 10 is provided with a permanent magnet slot group and a rotating shaft hole 14, and the permanent magnet slot group comprises an outer layer permanent magnet slot 11. The first fastening point assembly 50 includes a first fastening point 51 and a second fastening point 52, one of the first fastening point 51 and the second fastening point 52 is disposed on a first sidewall of the outer layer permanent magnet slot 11 close to a straight axis of the rotor body 10 (as shown in fig. 1, the straight axis is a d-axis in the drawing, and the quadrature axis is a q-axis in the drawing), the other one of the first fastening point 51 and the second fastening point 52 is disposed on a second sidewall of the outer layer permanent magnet slot 11 opposite to the first sidewall, the first fastening point 51 and the second fastening point 52 are disposed in a staggered manner, and a first limit space is formed between the first fastening point 51 and the second fastening point 52.
In this embodiment, with two knot point dislocation sets in outer permanent magnet groove on two lateral walls for the position connecting line of two knot points sets up along the permanent magnet diagonal direction that sets up in outer permanent magnet inslot, makes this permanent magnet when receiving the vibration, reaches the effect of reinforcing permanent magnet stability.
As shown in fig. 11, the first fastening point 51 is disposed on the first sidewall, the first fastening point 51 is a first protrusion, the first protrusion has a first edge 511, a first end of the first edge 511 is connected to the first sidewall and forms a first limiting angle, and a second end of the first edge 511 extends toward the second sidewall. The arrangement can enable the first edge to play a limiting role and bear the stress when the permanent magnet vibrates.
Wherein, the first protrusion further has a second edge 512, and a first end of the second edge 512 is connected with a second end of the first edge 511 and extends toward the outer edge of the rotor body 10 and gradually gets away from the second sidewall until the second end of the second edge 512 intersects with the first sidewall. The arrangement is convenient for increasing the strength of the bulge, so that the bulge can better play a role in limiting.
In this embodiment, the first protrusion further has a second side 512 and a third side 513, a first end of the second side 512 is connected with a second end of the first side 511 and has an included angle, a second end of the second side 512 extends toward the outer edge of the rotor body 10, a first end of the third side 513 is connected with a second end of the second side 512 and has an included angle, and a second end of the third side 513 is connected with the first side wall. The arrangement is convenient for increasing the strength of the bulge, so that the bulge can better play a role in limiting.
The second fastening point 52 is disposed on the second sidewall and close to the rotation axis hole 14 of the rotor body 10, the second fastening point 52 is a second protrusion, the second protrusion has a fourth side 521 disposed opposite to the first side 511, a first end of the fourth side 521 is connected to the second sidewall and has a second limiting angle, the second limiting angle is equal to or different from the first limiting angle, and a first limiting space is formed between the first side 511 and the fourth side 521. The arrangement is convenient for placing the permanent magnet in the first limit space and plays a role in fixing the permanent magnet.
In this embodiment, there are two first snap point assemblies 50, and the outer permanent magnet slot 11 includes a first outer permanent magnet slot segment 111 and a second outer permanent magnet slot segment 112. One of the two first trip point assemblies 50 is disposed on the first outer permanent magnet slot segment 111. The first outer layer permanent magnet slot section 111 and the second outer layer permanent magnet slot section 112 are arranged at a distance along the radial direction of the rotor body 10 and are located on two sides of the rotor body 10, the geometric center line of the first outer layer permanent magnet slot section 111 in the length direction has an included angle with the extension line of the geometric center line of the second outer layer permanent magnet slot section 112 in the length direction, and the other of the two first fastening point components 50 is arranged on the second outer layer permanent magnet slot section 112. The arrangement is convenient for the outer layer permanent magnet groove to better fix the permanent magnet through the buckling point component.
The number of the first pinch point assemblies 50 is two, and the outer permanent magnet slot 11 includes a first outer permanent magnet slot segment 111 and a second outer permanent magnet slot segment 112. The first end of first outer permanent magnet groove section 111 extends towards pivot hole 14, and the second end of first outer permanent magnet groove section 111 extends and keeps away from the straight-axis setting of rotor body 10 gradually towards the outer border of rotor body 10, and one of two first knot point subassemblies 50 sets up on first outer permanent magnet groove section 111. The first end of the second outer layer permanent magnet groove section 112 extends towards the rotating shaft hole 14 and is communicated with the first end of the first outer layer permanent magnet groove section 111, the second end of the second outer layer permanent magnet groove section 112 extends towards the outer edge of the rotor body 10 and gradually keeps away from the straight shaft, and the other of the two first buckling point assemblies 50 is arranged on the second outer layer permanent magnet groove section 112. The arrangement is convenient for the outer layer permanent magnet groove to better fix the permanent magnet through the buckling point component.
In this embodiment, the permanent magnet slot group further includes an inner permanent magnet slot 12, the outer permanent magnet slot 11 is disposed adjacent to the inner permanent magnet slot 12, a magnetic conduction channel is formed between the outer permanent magnet slot 11 and the inner permanent magnet slot 12, and the inner permanent magnet slot 12 includes a first inner permanent magnet slot segment 121, a second inner permanent magnet slot segment 122, and a third inner permanent magnet slot segment 123 that are sequentially disposed. The first inner permanent magnet slot segment 121, the second inner permanent magnet slot segment 122 and the third inner permanent magnet slot segment 123 are sequentially communicated to form a U-shaped structure with an opening facing the outer edge of the rotor body 10, or the first inner permanent magnet slot segment 121, the second inner permanent magnet slot segment 122 and the third inner permanent magnet slot segment 123 are sequentially arranged at intervals, and a magnetic separation bridge is formed between two adjacent first inner permanent magnet slot segments 121, the second inner permanent magnet slot segment 122 and the third inner permanent magnet slot segment 123. The arrangement is beneficial to making the magnetic isolation bridge thinner, and further improves the performance of the permanent magnet auxiliary synchronous reluctance motor (hereinafter referred to as the motor).
As shown in fig. 3 and 10, the rotor structure further includes a second fastening point assembly 60, and the second fastening point assembly 60 includes a third protrusion 61, which is disposed on a third sidewall of the first inner permanent magnet slot segment 121, which is far away from the straight axis of the rotor body 10. The arrangement is convenient for the inner layer permanent magnet groove to better fix the permanent magnet through the buckling point component.
In this embodiment, the second fastening point assembly 60 further includes a fourth protrusion 62, the fourth protrusion 62 is disposed on a fourth sidewall of the first inner permanent magnet slot segment 121 opposite to the third sidewall, and a second limiting space is formed between the third protrusion 61 and the fourth protrusion 62. The arrangement is convenient for the inner layer permanent magnet groove to better fix the permanent magnet through the buckling point component.
As shown in fig. 9 and 10, the rotor structure further includes a third fastening point assembly 70, where the third fastening point assembly 70 includes a fifth protrusion 71, and the fifth protrusion 71 is disposed on a side wall of the second inner layer permanent magnet groove segment 122 on the side away from the rotating shaft hole 14. The arrangement is convenient for the inner layer permanent magnet groove to better fix the permanent magnet through the buckling point component.
In this embodiment, the third fastening point assembly 70 further includes a sixth protrusion 72, the sixth protrusion 72 is disposed on the second inner layer permanent magnet groove section 122 and is located on the same sidewall as the fifth protrusion 71, and a third limiting space is formed between the fifth protrusion 71 and the sixth protrusion 72. The arrangement is convenient for better fixing the permanent magnet through the buckling point in the limit space.
As shown in fig. 3 and 5, the rotor structure further includes a fourth fastening point component 80, where the fourth fastening point component 80 includes a seventh protrusion 81, and the seventh protrusion 81 is disposed on a fifth side wall of the third inner permanent magnet groove section 123, which is far away from the straight shaft side of the rotor body 10. The arrangement is convenient for better fixing the permanent magnet through the buckling point in the limit space.
The fourth trip point assembly 80 further includes an eighth protrusion 82, the eighth protrusion 82 is disposed on a sixth side wall of the third inner layer permanent magnet groove section 123 opposite to the fifth side wall, or the eighth protrusion 82 is disposed on a side wall of the third inner layer permanent magnet groove section 123 close to the rotating shaft hole 14, and a fourth limit space is formed between the seventh protrusion 81 and the eighth protrusion 82. The arrangement is convenient for better fixing the permanent magnet through the buckling point in the limit space.
In this embodiment, the first end of the first protrusion is connected to the first sidewall, the second end of the first protrusion extends toward the second sidewall and is gradually disposed near the rotating shaft hole 14, or the first end of the second protrusion is connected to the second sidewall, the second end of the second protrusion extends toward the first sidewall and is gradually disposed far away from the rotating shaft hole 14, or both of them exist. The arrangement is convenient for better fixing the permanent magnet through the buckling point in the limit space.
In this embodiment, the rotor structure further includes a permanent magnet, the permanent magnet is provided with a limiting notch 40, and the permanent magnet includes an outer permanent magnet 20 and an inner permanent magnet 30. The outer permanent magnet 20 is arranged in the outer permanent magnet groove 11, and the limiting notch 40 is arranged on at least one end of the outer permanent magnet 20. The inner permanent magnet 30 is arranged in the inner permanent magnet groove 12, and the limit notch 40 is arranged on at least one end of the inner permanent magnet 30. The arrangement is convenient for the permanent magnet to be matched with the buckling point more tightly and firmly.
In this embodiment, the permanent magnet includes the permanent magnet body, including the first surface 41, second surface 42 and the third surface 43 that connect gradually on at least one end of permanent magnet body, the junction of first surface 41 and second surface 42 forms spacing breach 40, the first surface 41 has contained angle B with the plane at the lateral wall place that is close to first surface 41 of permanent magnet body, the lateral wall that is close to third surface 43 of third surface 43 and permanent magnet body has contained angle a, wherein, B ≠ a, or, a + B ═ 180. The arrangement is convenient for the permanent magnet body to be firmly buckled and limited, and the permanent magnet body does not move due to vibration.
In the present embodiment, the connecting line of the first fastening point 51 and the second fastening point 52 passes through the center of gravity of the outer permanent magnet 20 in the outer permanent magnet slot 11, or the connecting line of the third protrusion 61 and the fourth protrusion 62 passes through the center of gravity of the inner permanent magnet 30 in the inner permanent magnet slot 12, although both may be provided at the same time. The permanent magnet groove is arranged to fix the permanent magnet better, the stability of the permanent magnet is enhanced, and the performance of the motor is improved.
As shown in fig. 12, the inner layer permanent magnet slots 12 are at least two layers, the permanent magnet limit notches are diagonally arranged relative to the rectangular permanent magnet, the connecting line of the permanent magnet limit notches passes through the center of gravity of the permanent magnet, and the limit notch of each layer of permanent magnet slot is close to the q axis or the d axis. The friction between the surface of the permanent magnet and the permanent magnet groove is avoided, the stability of the permanent magnet is enhanced, and the performance of the motor is improved.
The rotor structure in the above embodiment may also be used in the technical field of motor equipment, that is, according to another aspect of the present invention, there is provided a permanent magnet-assisted synchronous reluctance motor, including a rotor structure, where the rotor structure is the above rotor structure.
The rotor structure in the above embodiments may also be used in the technical field of vehicle equipment, that is, according to another aspect of the present invention, there is provided an electric vehicle, including the rotor structure, where the rotor structure is the above rotor structure.
As shown in fig. 1, the through hole 13 on the rotor sheet has a plurality of permanent magnet slot groups, a plurality of poles are uniformly distributed on the circumference, the permanent magnet slot groups have at least two layers, and the first inner layer permanent magnet slot section 121, the second inner layer permanent magnet slot section 122 and the third inner layer permanent magnet slot section 123 are sequentially communicated to form a U-shaped structure with an opening facing the outer edge of the rotor body 10. Each permanent magnet slot has at least two fastening points for fixing the permanent magnets. To prevent the permanent magnets from sliding in the permanent magnet slots.
The first inner layer permanent magnet groove section 121 and the third inner layer permanent magnet groove section 123 are arranged on one side, close to the q axis, of the permanent magnet groove, and when the permanent magnet is acted by centrifugal force, the centrifugal force generated by the inner layer permanent magnet can be borne by the q axis through the buckling point structure. The width of the iron core at the q axis is far wider than the thicknesses of the tangential magnetic isolation bridge and the radial magnetic isolation bridge, so that the structural strength is high. After the centrifugal force is shared to the q axis, the maximum local stress of the tangential magnetic isolation bridge and the radial magnetic isolation bridge is reduced by more than 50% through finite element simulation analysis. The inner buckling point of the inner layer radial permanent magnet groove is arranged at the opposite angle of the rectangular permanent magnet groove section. When the permanent magnet is subjected to the action force of vibration and an armature magnetic field, because the connecting line of the two buckling points of the slot passes through or is close to the gravity center position of the permanent magnet, the stress applied to the two buckling points is more balanced, and the permanent magnet is more stable. Before the permanent magnet is inserted into the slot, a small amount of epoxy glue can be coated on the surface of the permanent magnet contacting with the buckling point in advance to completely eliminate the fit clearance.
As shown in fig. 4, the inner layer tangential permanent magnet slot fastening point position in the second inner layer permanent magnet slot segment 122 is arranged at the upper part of the permanent magnet slot, so that the fastening point position is conveniently shared with the inner fastening point of the inner layer permanent magnet slot, and the structure can extend to the iron core to form a radial magnetic isolation bridge structure and is bridged on the permanent magnet slot. As shown in fig. 2 and 3, a part of the radial magnetic isolation bridge can be directly used as a buckling point, and the positioning point of the permanent magnet is in contact with the radial magnetic isolation bridge. This structure is typically added when the rotor strength is insufficient. Considering that the force bearing surface of the second inner layer permanent magnet slot section 122 is perpendicular to the centrifugal force direction under the action of the centrifugal force, and there is no rotating couple on the permanent magnet, the fastening point positions are arranged on the same side. It is of course also possible to design the inner tangential permanent magnets on the diagonal sides without much influence on how the fastening points are arranged. The inner radial permanent magnets and the inner tangential permanent magnets are respectively arranged in the corresponding permanent magnet slots.
In this embodiment, the outer layer radial permanent magnet slot outer snap points and the outer layer radial permanent magnet slot inner snap points in the outer layer radial permanent magnet slots are located on opposite angular sides of the permanent magnet slots. When no radial magnetic isolation bridge exists, the radial permanent magnet is inclined relative to the d-axis due to the outer layer. The bottom of the rectangular permanent magnet forms a triangular space region with the d axis and the horizontal direction. In order to utilize the area of the permanent magnet slot to the maximum extent and increase the length (dosage) of the permanent magnet. And designing the inner buckling point of the outer radial permanent magnet slot on one side of the slot close to the d axis. The space can be fully utilized. The outer layer radial permanent magnet slot outer fastening point is positioned at the opposite angle of the position. Under the conventional design, the length of the permanent magnet can be at least increased by 2-4 mm, and the performance and power of the motor can be improved.
In this embodiment, when there is radial magnetism bridge to span on the d axle on the outer radial permanent magnet groove, receive magnetism bridge space restriction, outer radial permanent magnet inslot detain the point design and is close to d axle one side, can lead to magnetism bridge equivalent width to increase, length shortens, make the magnetic leakage increase, the motor performance descends, consequently, outer radial permanent magnet inslot detains the point and need design in one side that d axle was kept away from in this groove, then outer radial permanent magnet inslot detains the point this moment because needs the diagonal angle to arrange, just be close to one side of d axle in this groove.
As shown in fig. 6 and 7, perpendicular to the permanent magnet slot inner wall. But may also be inclined. The direction of inclination should be towards another corresponding position of the pinch point in the same slot. A notch is arranged at the position matched with the buckling point on the permanent magnet, and the notch enables the vertex of the original rectangular permanent magnet to be changed into an acute angle from a right angle. The matched buckling point is changed from a right angle to an acute angle. The same change at the other end of the diagonal. When the permanent magnet is inserted into the permanent magnet slot, the permanent magnet is limited by the buckling point. Considering the performance of the permanent magnet and the influence of demagnetization, the inclination angle is usually less than 10 degrees. The length of the contact portion of the pinch point is less than 5 mm.
As shown in fig. 8, for convenience of processing. The edge of the permanent magnet, which is contacted with the two buckling points, is directly processed into an inclined plane, so that the whole permanent magnet is in a parallelogram shape. To avoid over-sharpening the permanent magnet, causing demagnetization of the tip, the angle C is typically less than 100 degrees. By adopting the design, the secondary processing after molding is facilitated. Meanwhile, the functions of fool-proofing and mistake-proofing can be achieved. For example, in some large-scale motor manufacturing processes, it is common for the permanent magnets to be magnetized and then assembled with the magnets. When the permanent magnet is rectangular, any one of the faces may be inserted facing the d-axis. There will be an opposite polarity of the permanent magnets under the same pole. With this design, the face in which it is inserted is unique. Under the same pole, two permanent magnets with different polarities cannot be inserted, and the effects of avoiding production quality and preventing mistakes are achieved.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
through the diagonal arrangement of the permanent magnet buckling points relative to the rectangular permanent magnet, when the rectangular permanent magnet is vibrated, the connecting line of the two buckling points passes through the gravity center of the permanent magnet, so that the stress of the buckling points can be reduced, and the effect of enhancing the stability of the permanent magnet can be achieved. For example, when a rectangular object is pinched by two fingers, the stability is obviously better than pinching the object on one side of the rectangle when the point of application is diagonal.
The buckling points of the inner layer permanent magnets are designed on the q axis, the centrifugal force of the inner layer tangential permanent magnets acts on the q axis with higher structural strength through the buckling points, and compared with the method of overcoming the centrifugal force of the permanent magnets by means of a tangential magnetism isolating bridge and a radial magnetism isolating bridge, the rotor assembly has higher structural strength. Or under the design of equivalent structural strength, the magnetic isolation bridge is designed to be thinner, which is beneficial to improving the performance of the motor. The structural strength refers to the ratio of the allowable stress to the maximum local stress of the iron core material under the same rotating speed and load. The smaller the maximum local stress, the higher its rotor strength.
Because the outer layer permanent magnet is obliquely arranged at a certain angle with the d axis, when a radial magnetic isolation bridge structure is not provided, the bottom buckling point of the outer layer permanent magnet is designed at one side close to the d axis, and the buckle can be designed by fully utilizing the triangular area part formed by the rectangular permanent magnet and the permanent magnet groove. The length of the permanent magnet can be increased, and the power factor and the performance of the motor are improved.
When there is radial magnetism bridge that separates, can make magnetism bridge's thickness thickened a lot if outer permanent magnet bottom detains the design at the d axle, its magnetic leakage increases, influences the motor performance. Therefore, the positions of the bottom fastening points of the outer layer permanent magnet are arranged on one side of the permanent magnet slot, which is far away from the d axis.
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 (17)
1. A rotor structure, comprising:
the rotor comprises a rotor body (10), wherein a permanent magnet groove group and a rotating shaft hole (14) are arranged on the rotor body (10), and the permanent magnet groove group comprises an outer layer permanent magnet groove (11);
a first fastening point assembly (50), wherein the first fastening point assembly (50) comprises a first fastening point (51) and a second fastening point (52), one of the first fastening point (51) and the second fastening point (52) is arranged on a first side wall, close to a straight axis of the rotor body (10), of the outer layer permanent magnet slot (11), the other of the first fastening point (51) and the second fastening point (52) is arranged on a second side wall, opposite to the first side wall, of the outer layer permanent magnet slot (11), the first fastening point (51) and the second fastening point (52) are arranged in a staggered mode, and a first limit space is formed between the first fastening point (51) and the second fastening point (52);
the first buckling point (51) is arranged on the first side wall, the first buckling point (51) is a first protrusion, the first protrusion is provided with a first edge (511), a first end of the first edge (511) is connected with the first side wall and forms a first limiting angle, and a second end of the first edge (511) extends towards the second side wall; the second buckling point (52) is arranged on the second side wall and close to the rotating shaft hole (14), the second buckling point (52) is a second bulge, the second bulge is provided with a fourth edge (521) opposite to the first edge (511), the first end of the fourth edge (521) is connected with the second side wall and is provided with a second limiting angle, the second limiting angle is equal to or different from the first limiting angle, and the first limiting space is formed between the first edge (511) and the fourth edge (521);
the permanent magnet slot group further comprises:
the inner permanent magnet slot (12), the outer permanent magnet slot (11) and the inner permanent magnet slot (12) are adjacently arranged, a magnetic conduction channel is formed between the outer permanent magnet slot (11) and the inner permanent magnet slot (12), and the inner permanent magnet slot (12) comprises a first inner permanent magnet slot section (121), a second inner permanent magnet slot section (122) and a third inner permanent magnet slot section (123) which are sequentially arranged;
the first inner layer permanent magnet groove section (121), the second inner layer permanent magnet groove section (122) and the third inner layer permanent magnet groove section (123) are communicated in sequence to form a U-shaped structure with an opening facing the outer edge of the rotor body (10), or,
the first inner layer permanent magnet groove section (121), the second inner layer permanent magnet groove section (122) and the third inner layer permanent magnet groove section (123) are sequentially arranged at intervals, and a magnetic isolation bridge is formed between two adjacent first inner layer permanent magnet groove sections (121), second inner layer permanent magnet groove sections (122) and third inner layer permanent magnet groove sections (123);
the rotor structure further comprises a third buckling point assembly (70), the third buckling point assembly (70) comprises a fifth bulge (71), and the fifth bulge (71) is arranged on the side wall, far away from one side of the rotating shaft hole (14), of the second inner layer permanent magnet groove section (122).
2. A rotor structure according to claim 1, characterized in that the first protrusion further has a second edge (512), a first end of the second edge (512) being connected with a second end of the first edge (511) and extending towards the outer rim of the rotor body (10) and gradually away from the second side wall until a second end of the second edge (512) intersects the first side wall.
3. A rotor structure according to claim 1, characterised in that the first protrusion further has a second edge (512) and a third edge (513), the first end of the second edge (512) being connected with the second end of the first edge (511) and having an included angle, the second end of the second edge (512) extending towards the outer rim of the rotor body (10), the first end of the third edge (513) being connected with the second end of the second edge (512) and having an included angle, the second end of the third edge (513) being connected with the first side wall.
4. A rotor structure according to any one of claims 1 to 3, characterized in that the first pinch point assemblies (50) are two, the outer permanent magnet slots (11) comprising:
a first outer layer permanent magnet slot segment (111), one of the two first trip point assemblies (50) being disposed on the first outer layer permanent magnet slot segment (111);
second outer layer permanent magnet groove section (112), first outer layer permanent magnet groove section (111) with second outer layer permanent magnet groove section (112) are followed the radial direction of rotor body (10) has the distance to set up and is located the both sides of the straight axis of rotor body (10), the length direction's of first outer layer permanent magnet groove section (111) geometric centre line with the length direction's of second outer layer permanent magnet groove section (112) geometric centre line's of extension line has the contained angle, two in first dotting subassembly (50) another set up in on second outer layer permanent magnet groove section (112).
5. The rotor structure according to claim 1, characterized in that the first pinch point assemblies (50) are two, the outer permanent magnet slots (11) comprising:
a first outer layer permanent magnet groove section (111), a first end of the first outer layer permanent magnet groove section (111) extends towards the rotating shaft hole (14), a second end of the first outer layer permanent magnet groove section (111) extends towards the outer edge of the rotor body (10) and is gradually far away from the straight shaft of the rotor body (10), and one of the two first fastening point assemblies (50) is arranged on the first outer layer permanent magnet groove section (111);
second outer layer permanent magnet groove section (112), the first end orientation of second outer layer permanent magnet groove section (112) the pivot hole (14) extend and with the first end of first outer layer permanent magnet groove section (111) is linked together, the second end orientation of second outer layer permanent magnet groove section (112) the outer border of rotor body (10) extends and keeps away from gradually the straight axis sets up, two another in first knot point subassembly (50) set up in on second outer layer permanent magnet groove section (112).
6. The rotor structure according to claim 1, characterized in that the rotor structure further comprises a second pinch point assembly (60), the second pinch point assembly (60) comprising a third protrusion (61) provided on a third side wall of the first inner layer permanent magnet slot segment (121) remote from the straight axis of the rotor body (10).
7. The rotor structure according to claim 6, characterized in that the second fastening point assembly (60) further comprises a fourth protrusion (62), the fourth protrusion (62) is disposed on a fourth side wall of the first inner layer permanent magnet slot segment (121) opposite to the third side wall, and a second limiting space is formed between the third protrusion (61) and the fourth protrusion (62).
8. The rotor structure of claim 1, characterized in that the third fastening point assembly (70) further comprises a sixth protrusion (72), the sixth protrusion (72) is disposed on the second inner layer permanent magnet groove section (122) and located on the same side wall as the fifth protrusion (71), and a third limiting space is formed between the fifth protrusion (71) and the sixth protrusion (72).
9. The rotor structure according to claim 1, characterized in that the rotor structure further comprises a fourth fastening point component (80), the fourth fastening point component (80) comprising a seventh protrusion (81), the seventh protrusion (81) being provided on a fifth side wall of the third inner layer permanent magnet slot segment (123) on the side away from the straight axis of the rotor body (10).
10. The rotor structure according to claim 9, wherein the fourth fastening point component (80) further comprises an eighth protrusion (82), the eighth protrusion (82) is disposed on a sixth side wall of the third inner layer permanent magnet groove section (123) opposite to the fifth side wall, or the eighth protrusion (82) is disposed on a side wall of the third inner layer permanent magnet groove section (123) on a side close to the rotating shaft hole (14), and a fourth limit space is formed between the seventh protrusion (81) and the eighth protrusion (82).
11. The rotor structure according to claim 1, characterized in that a first end of the first protrusion is connected to the first side wall, and a second end of the first protrusion extends toward the second side wall and is disposed gradually closer to the rotation shaft hole (14), and/or a first end of the second protrusion is connected to the second side wall, and a second end of the second protrusion extends toward the first side wall and is disposed gradually farther from the rotation shaft hole (14).
12. The rotor structure of claim 6, further comprising a permanent magnet, wherein the permanent magnet is provided with a limit notch (40), and the permanent magnet comprises:
the outer permanent magnet (20) is arranged in the outer permanent magnet groove (11), and the limiting notch (40) is arranged on at least one end of the outer permanent magnet (20);
the inner layer permanent magnet (30) is arranged in the inner layer permanent magnet groove (12), and the limiting notch (40) is arranged on at least one end of the inner layer permanent magnet (30).
13. The rotor structure of claim 12, wherein the permanent magnets comprise:
the permanent magnet body, including first surface (41), second surface (42) and third surface (43) that connect gradually on the at least one end of permanent magnet body, first surface (41) with the junction of second surface (42) forms spacing breach (40), first surface (41) with being close to of permanent magnet body the plane at the lateral wall place of first surface (41) has contained angle B, third surface (43) with being close to of permanent magnet body the lateral wall of third surface (43) has contained angle A, and wherein, B is not equal to A, perhaps, A + B is 180.
14. A rotor structure according to claim 7, characterized in that the line connecting the first and second fastening points (51, 52) passes through the centre of gravity of the outer layer permanent magnet (20) in the outer layer permanent magnet slot (11) and/or the line connecting the third and fourth protrusions (61, 62) passes through the centre of gravity of the inner layer permanent magnet (30) in the inner layer permanent magnet slot (12).
15. Rotor structure according to claim 5, characterised in that the inner layer permanent magnet slots (12) are at least two layers.
16. A permanent magnet assisted synchronous reluctance machine comprising a rotor structure, characterized in that the rotor structure is as claimed in any one of claims 1 to 15.
17. An electric vehicle comprising a rotor structure, characterized in that the rotor structure is a rotor structure according to any one of claims 1 to 15.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219855.1A CN108390483B (en) | 2018-03-16 | 2018-03-16 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
| PCT/CN2018/119780 WO2019174311A1 (en) | 2018-03-16 | 2018-12-07 | Rotor structure, permanent magnet assisted synchronous reluctance motor, and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810219855.1A CN108390483B (en) | 2018-03-16 | 2018-03-16 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108390483A CN108390483A (en) | 2018-08-10 |
| CN108390483B true CN108390483B (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810219855.1A Active CN108390483B (en) | 2018-03-16 | 2018-03-16 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
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| Country | Link |
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| CN (1) | CN108390483B (en) |
| WO (1) | WO2019174311A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390483B (en) * | 2018-03-16 | 2020-12-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
| CN112510870B (en) * | 2020-11-12 | 2022-07-22 | 珠海格力电器股份有限公司 | Motor rotor and motor |
| CN113949185A (en) * | 2021-10-15 | 2022-01-18 | 浙江中车尚驰电气有限公司 | Rotor punching sheet compatible with high speed and low speed, rotor and motor thereof |
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| WO2006047519A2 (en) * | 2004-10-26 | 2006-05-04 | Kollmorgen Corporation | Design of the magnet and webs in interior permanent magent rotors |
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| CN107659012A (en) * | 2017-10-25 | 2018-02-02 | 常州威灵电机制造有限公司 | Rotor punching, rotor and motor |
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| JPH10285847A (en) * | 1997-04-09 | 1998-10-23 | Mitsubishi Electric Corp | Permanent-magnet type motor |
| US9479017B2 (en) * | 2014-07-22 | 2016-10-25 | GM Global Technology Operations LLC | Deep V-magnet cavity structure rotor |
| US10003227B2 (en) * | 2015-03-20 | 2018-06-19 | GM Global Technology Operations LLC | Axially asymmetric configuration for interior permanent magnet machine |
| CN205407440U (en) * | 2016-02-25 | 2016-07-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor core and have its PMSM |
| CN108390483B (en) * | 2018-03-16 | 2020-12-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, permanent magnet auxiliary synchronous reluctance motor and electric automobile |
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2018
- 2018-03-16 CN CN201810219855.1A patent/CN108390483B/en active Active
- 2018-12-07 WO PCT/CN2018/119780 patent/WO2019174311A1/en active Application Filing
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| WO2006047519A2 (en) * | 2004-10-26 | 2006-05-04 | Kollmorgen Corporation | Design of the magnet and webs in interior permanent magent rotors |
| CN205566051U (en) * | 2015-12-29 | 2016-09-07 | 丹佛斯（天津）有限公司 | Electric motor |
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| CN107465287A (en) * | 2017-08-31 | 2017-12-12 | 佛山市威灵洗涤电机制造有限公司 | Rotor assembly, rotor assembly and motor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108390483A (en) | 2018-08-10 |
| WO2019174311A1 (en) | 2019-09-19 |
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