CN108711968B - Rotor assembly and motor - Google Patents
Rotor assembly and motor Download PDFInfo
- Publication number
- CN108711968B CN108711968B CN201810771242.9A CN201810771242A CN108711968B CN 108711968 B CN108711968 B CN 108711968B CN 201810771242 A CN201810771242 A CN 201810771242A CN 108711968 B CN108711968 B CN 108711968B
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- slit groove
- axis
- slit
- rotor body
- reinforcing rib
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- 230000004907 flux Effects 0.000 claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 claims description 87
- 239000000463 material Substances 0.000 claims description 46
- 230000005389 magnetism Effects 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 11
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000011324 bead Substances 0.000 description 10
- 230000001360 synchronised effect Effects 0.000 description 6
- 241000555745 Sciuridae Species 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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
-
- 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
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a rotor assembly and a motor, wherein the rotor assembly comprises a rotor body, and the rotor body is provided with a plurality of slit grooves; the slit grooves extend in a straight line in a direction perpendicular to the d-axis on a section perpendicular to the axis of the rotor body, so that magnetic flux channels parallel to the q-axis are formed between adjacent slit grooves. The invention has the advantages of reasonable design and low cost, and can enable the magnetic flux of the q axis to be smoother, enable the magnetic flux phase difference of the d axis and the q axis to be more obvious, and further improve the output power and the efficiency.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a rotor assembly and a motor.
Background
The direct-starting synchronous reluctance motor combines the structural characteristics of the induction motor and the synchronous reluctance motor, realizes starting by generating moment through squirrel cage induction, realizes constant-speed operation by generating reluctance torque through rotor inductance gap, and can realize starting operation by directly inputting power. Compared with a direct-start permanent magnet motor, the direct-start synchronous reluctance motor has no rare earth permanent magnet material, no demagnetization problem, low motor cost and good reliability; compared with an asynchronous motor, the motor has high efficiency and constant rotating speed.
The traditional synchronous reluctance motor needs a driver to start and control operation, has high cost and difficult control, and the driver occupies part of loss, so that the efficiency of the whole motor system is reduced.
In the prior art, CN 1255925C provides a low-cost synchronous induction motor which is easy to start, a manufacturing device and a manufacturing method of the synchronous induction motor, at least one pair of slit parts of a q-axis in a direction in which magnetic flux easily flows and a magnetic pole protrusion of two poles forming 90 degrees as a d-axis in a direction in which magnetic flux hardly flows are provided on a rotor, and a plurality of slit parts arranged on the outer periphery side of the slit parts, and conductive materials are filled in the slit parts and the slit parts. The slit portions are formed in a linear shape, and the slit portions are radially arranged at equal intervals in the circumferential direction.
However, in this patent, since the slot portions are radially arranged at equal intervals so that the magnetic flux direction between the slot portions flows radially perpendicularly to the rotor surface, the slot portions block the flow of the magnetic flux in the q-axis direction, and in particular, the slot portions closer to the d-axis are more significantly blocked by the q-axis magnetic flux and the d-axis magnetic flux flows more smoothly, the difference between the d-axis magnetic flux and the q-axis magnetic flux is not significantly large, the salient pole ratio is not large, and the output power and the efficiency are low.
Disclosure of Invention
The invention mainly aims to provide a rotor assembly and a motor which are reasonable in design and low in cost, and the rotor assembly and the motor can enable magnetic flux of a q axis to be smoother, enable magnetic flux phase differences of d and q axes to be more obvious, and further improve output power and efficiency.
The invention provides a rotor assembly, which comprises a rotor body, wherein the rotor body is provided with a plurality of slit grooves;
the slit grooves extend in a straight line in a direction perpendicular to the d-axis on a section perpendicular to the axis of the rotor body, so that magnetic flux channels parallel to the q-axis are formed between adjacent slit grooves.
Preferably, a distance exists between the slit groove and the outer peripheral wall of the rotor body.
Preferably, on a section perpendicular to the axis of the rotor body, along the extending direction of the d axis, the slit grooves at two ends are first slit grooves, and the first slit grooves are filled with conductive magnetism isolating materials.
Preferably, in a section perpendicular to the axis of the rotor body, the first slit groove is in an axisymmetric pattern with the d-axis as the symmetry axis.
Preferably, a first reinforcing rib is arranged in the first slit groove, and two ends of the first reinforcing rib are connected to two opposite wall surfaces of the first slit groove perpendicular to the d axis.
Preferably, on a section perpendicular to the axis of the rotor body, the first reinforcing rib is in an axisymmetric pattern with the d-axis as a symmetry axis.
Preferably, the first reinforcing rib is integrally formed on the rotor body.
Preferably, the rotor body is provided with a shaft hole coaxial with the rotor body, and the slit groove comprises a second slit groove;
in a section perpendicular to the rotor body axis, the second slit groove is located between the first slit groove and the shaft hole.
Preferably, in a section perpendicular to the axis of the rotor body, the second slit groove is in an axisymmetric pattern with the d-axis as the symmetry axis.
Preferably, two second reinforcing ribs are arranged in the second slit groove, two ends of the second reinforcing ribs are connected to two opposite wall surfaces perpendicular to the d axis of the second slit groove, the second slit groove is divided into a second slit groove a, a second slit groove b and a second slit groove c which are sequentially arranged along the q axis extending direction by the two second reinforcing ribs, and the second slit groove a and the second slit groove c are filled with conductive magnetism isolating materials.
Preferably, on a section perpendicular to the axis of the rotor body, the two second reinforcing ribs are symmetrical to each other with the d-axis as a symmetry axis.
Preferably, the second reinforcing rib is integrally formed on the rotor body.
Preferably, the number of the second slit grooves is at least two between one of the first slit grooves and the shaft hole.
Preferably, the slit groove further comprises a third slit groove and a fourth slit groove;
the third slit groove and the fourth slit groove are respectively arranged at two sides of the shaft hole, and the third slit groove and the fourth slit groove are symmetrical with each other by taking a d axis as a symmetry axis.
Preferably, a third reinforcing rib is arranged in the third slit groove, two ends of the third reinforcing rib are connected to two opposite wall surfaces of the third slit groove perpendicular to the d axis, so that the third slit groove is divided into a third slit groove a far away from the shaft hole and a third slit groove b close to the shaft hole, and the third slit groove a is filled with a conductive magnetism isolating material;
The novel electric motor is characterized in that a fourth reinforcing rib is arranged in the fourth slit groove, two ends of the fourth reinforcing rib are connected to two opposite wall surfaces perpendicular to the d axis of the fourth slit groove, so that the fourth slit groove is divided into a fourth slit groove a far away from the shaft hole and a fourth slit groove b close to the shaft hole, and the fourth slit groove a is filled with an electric conduction magnetic isolation material.
Preferably, on a section perpendicular to the axis of the rotor body, the third reinforcing rib and the fourth reinforcing rib are symmetrical with each other with the d-axis as a symmetry axis.
Preferably, the third reinforcing rib and/or the fourth reinforcing rib are/is integrally formed on the rotor body.
Preferably, the number of the third slit grooves is at least two, and the number of the fourth slit grooves is equal to the number of the third slit grooves and corresponds to one of the third slit grooves.
Preferably, a tangential plane perpendicular to the d axis is arranged on the peripheral wall of the rotor body, and on a section perpendicular to the axis of the rotor body, the included angles between two ends of the tangential plane and the central line of the rotor body are theta, wherein theta is more than or equal to 0.05 tau and less than or equal to 0.2 tau, wherein tau is a polar angle, namely tau=180 degrees/p, and p is a polar logarithm.
Preferably, the device further comprises a conductive ring;
the conducting ring is arranged at the end part of the rotor body, and when the slit grooves at the two ends are first slit grooves, and the first slit grooves are filled with conducting magnetism isolating materials, the conducting ring can be pressed and attached to the conducting magnetism isolating materials in the first slit grooves.
Preferably, when the slit groove comprises a second slit groove, two second reinforcing ribs are arranged in the second slit groove, the second slit groove is divided into a second slit groove a, a second slit groove b and a second slit groove c which are sequentially arranged along the q-axis extending direction by the two second reinforcing ribs, and the second slit groove a and the second slit groove c are filled with the conductive magnetic isolation material, the conductive ring can be pressed and attached to the conductive magnetic isolation material in the second slit groove a and the second slit groove c.
Preferably, the conductive ring is provided with a heat dissipation hole;
the second slit groove b is positioned in the heat dissipation hole on the projection along the axial direction of the rotor body.
Preferably, the slit groove further comprises a third slit groove and a fourth slit groove, a third reinforcing rib is arranged in the third slit groove and divides the third slit groove into a third slit groove a far away from the shaft hole and a third slit groove b close to the shaft hole, the third slit groove a is filled with a conductive magnetism isolating material, a fourth reinforcing rib is arranged in the fourth slit groove and divides the fourth slit groove into a fourth slit groove a far away from the shaft hole and a fourth slit groove b close to the shaft hole, the fourth slit groove a is filled with a conductive magnetism isolating material, and the conductive ring is pressed on the conductive magnetism isolating material in the third slit groove a and the fourth slit groove a.
Preferably, on a projection along the axial direction of the rotor body, the third slit groove b and the fourth slit groove b are both located within the heat dissipation hole.
In a further aspect the invention provides an electrical machine comprising a rotor assembly of any of the above features.
Preferably, the motor further comprises a stator;
The stator is provided with a mounting hole, the rotor body in the rotor assembly is arranged in the mounting hole in a penetrating way and is coaxial with the mounting hole, and the distance between the outer wall of the rotor body and the inner wall of the mounting hole in the radial direction of the rotor body is H;
When the rotor body has the first reinforcing rib, the width of the first reinforcing rib is L1 and H is equal to or less than L1 and equal to or less than 2H in a section perpendicular to the axis of the rotor body.
Preferably, when the rotor body has the second reinforcing rib, the width of the second reinforcing rib is L2 and h.ltoreq.l2.ltoreq.2h in a section perpendicular to the axis of the rotor body.
Preferably, when the rotor body has the third reinforcing rib, the third reinforcing rib has a width L3 and h.ltoreq.l3.ltoreq.2h on a section perpendicular to the axis of the rotor body.
According to the rotor assembly provided by the invention, the slit grooves extend along the straight line in the direction perpendicular to the d axis on the section perpendicular to the axis of the rotor body, so that the magnetic flux channels parallel to the q axis are formed between the adjacent slit grooves.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic view of an embodiment of a rotor assembly of the present invention;
fig. 2 is a schematic view of the rotor body of fig. 1 in semi-section.
In the figure: 1. a rotor body; 11. slit grooves; 12. a magnetic flux path; 13. a first slit groove; 131. a first reinforcing rib; 14. a shaft hole; 15. a second slit groove; 151. a second reinforcing rib; 152. a second slit groove a; 153. a second slit groove b; 154. a second slit groove c; 16. a third slit groove; 161. a third reinforcing rib; 162. a third slit groove a; 163. a third slit groove b; 17. a fourth slit groove; 171. fourth reinforcing ribs; 172. a fourth slit groove a; 173. a fourth slit groove b; 18. cutting into sections; 2. a conductive ring; 21. and the heat dissipation holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments of the present invention and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
As shown in fig. 1, a rotor assembly includes a rotor body 1, the rotor body 1 having a plurality of slit grooves 11, the slit grooves 11 extending in a straight line in a direction perpendicular to a d-axis in a section perpendicular to an axis of the rotor body 1, so that magnetic flux paths 12 parallel to a q-axis are formed between adjacent slit grooves 11. Thus, compared with the prior art, the magnetic flux can flow in the q-axis direction without obstruction; and a magnetic resistance barrier is formed in the d-axis direction to block the flow of magnetic flux in the d-axis direction, so that the difference of magnetic fluxes in the dq-axis direction is increased, the magnetic resistance torque is further increased, and the motor efficiency and the maximum torque are improved.
Specifically, as shown in fig. 2, in a section perpendicular to the axis of the rotor body 1, along the extending direction of the d-axis, the slit grooves 11 at both ends are first slit grooves 13, and the first slit grooves 13 are filled with an electrically conductive magnetic shielding material, wherein the electrically conductive magnetic shielding material may be aluminum or an aluminum alloy. In actual manufacturing, the first slit groove 13 is spaced from the outer peripheral wall of the rotor body 1, so that when the first slit groove 13 is filled with the conductive magnetic isolation material, the conductive magnetic isolation material does not protrude from the outer peripheral wall of the rotor body 1, that is, when the conductive magnetic isolation material is filled, the outer peripheral wall of the rotor body 1 does not need to be processed, and further the manufacturing cost is reduced. Preferably, the first slit 13 is in an axisymmetric pattern having the d-axis as the symmetry axis in a section perpendicular to the axis of the rotor body 1.
Further, as shown in fig. 2, a first reinforcing rib 131 is provided in the first slit groove 13, and both ends of the first reinforcing rib 131 are connected to two opposite wall surfaces of the first slit groove 13 perpendicular to the d-axis. This can improve the strength of the rotor body, and preferably, the first reinforcing ribs 131 are formed in an axisymmetric pattern having the d-axis as the symmetry axis in a cross section perpendicular to the axis of the rotor body 1. In actual manufacturing, the first reinforcing rib 131 may be integrally formed on the rotor body 1, but is not limited thereto.
As an alternative embodiment, as shown in fig. 2, the rotor body 1 has a shaft hole 14 coaxial with the rotor body 1, and the slit groove 11 includes a second slit groove 15, and the second slit groove 15 is located between the first slit groove 13 and the shaft hole 14 in a section perpendicular to the axis of the rotor body 1. Preferably, the second slit groove 15 is in an axisymmetric pattern having the d-axis as the symmetry axis in a section perpendicular to the axis of the rotor body 1. Specifically, two second reinforcing ribs 151 are disposed in the second slit groove 15, two ends of the second reinforcing ribs 151 are connected to two opposite wall surfaces of the second slit groove 15 perpendicular to the d axis, so that the two second reinforcing ribs 151 divide the second slit groove 15 into a second slit groove a152, a second slit groove b153 and a second slit groove c154 which are sequentially arranged along the q axis extending direction, and the second slit groove a152 and the second slit groove c154 are filled with conductive magnetism isolating materials. The strength of the rotor body 1 can be improved, the second slit groove a152, the second slit groove c154 and the first slit groove 13 can be distributed along the circumferential direction of the rotor body 1, the conductive magnetism-isolating material in the rotor body is conducted to form a squirrel cage, and the asynchronous starting capability of the motor is further improved. Preferably, the two second reinforcing ribs 151 are symmetrical to each other about the d-axis as a symmetry axis in a section perpendicular to the axis of the rotor body 1, so that the second slit groove a152 and the second slit groove c154 can be symmetrical to each other about the d-axis as a symmetry axis. In actual manufacturing, the second reinforcing ribs 151 are integrally formed on the rotor body 1. In actual production, as shown in fig. 2, between one of the first slit grooves 13 and the shaft hole 14, the number of the second slit grooves 15 is at least two. This can further block the magnetic flux in the d-axis direction, and further make the difference between the d-axis magnetic flux and the q-axis magnetic flux more remarkable. In actual manufacturing, the second slit groove 15 is spaced from the outer peripheral wall of the rotor body 1 in the same manner as the first slit groove 13, so that when the second slit groove a152 and the second slit groove c154 are filled with the conductive magnetism isolating material, the conductive magnetism isolating material does not protrude from the outer peripheral wall of the rotor body 1, that is, when the conductive magnetism isolating material is filled, the outer peripheral wall of the rotor body 1 does not need to be processed, and the manufacturing cost is reduced.
As one embodiment, as shown in fig. 2, the slit groove 11 further includes a third slit groove 16 and a fourth slit groove 17, the third slit groove 16 and the fourth slit groove 17 are provided on both sides of the shaft hole 14, respectively, and the third slit groove 16 and the fourth slit groove 17 are symmetrical to each other with the d-axis as a symmetry axis. Specifically, a third reinforcing rib 161 is disposed in the third slit groove 16, both ends of the third reinforcing rib 161 are connected to two opposite wall surfaces of the third slit groove 16 perpendicular to the d-axis to divide the third slit groove 16 into a third slit groove a162 far from the shaft hole 14 and a third slit groove b163 near the shaft hole 14, and the third slit groove a162 is filled with a conductive magnetism blocking material. Meanwhile, a fourth reinforcing rib 171 is arranged in the fourth slit groove 17, two ends of the fourth reinforcing rib 171 are connected to two opposite wall surfaces of the fourth slit groove 17 perpendicular to the d axis, so that the fourth slit groove 17 is divided into a fourth slit groove a172 far from the shaft hole 14 and a fourth slit groove b173 close to the shaft hole 14, and the fourth slit groove a172 is filled with a conductive magnetism isolating material. Thus, the third slit groove a162, the fourth slit groove a172, the second slit groove a152, the second slit groove c154 and the first slit groove 13 are distributed along the circumferential direction of the rotor body 1, and the conductive magnetism-isolating material in the rotor body is conducted to form a squirrel cage during actual use, so that the asynchronous starting capability of the motor is further improved. In actual manufacturing, the third slit groove 16, the fourth slit groove 17 and the outer peripheral wall of the rotor body 1 are spaced apart from each other, so that when the third slit groove a162 and the fourth slit groove a172 are filled with the conductive magnetism isolating material, the conductive magnetism isolating material does not protrude from the outer peripheral wall of the rotor body 1, that is, when the conductive magnetism isolating material is filled, the outer peripheral wall of the rotor body 1 does not need to be machined, and the manufacturing cost is reduced.
Specifically, in a section perpendicular to the axis of the rotor body 1, the third bead 161 and the fourth bead 171 are symmetrical to each other with the d-axis as the symmetry axis. In actual manufacturing, the third reinforcing bead 161 and/or the fourth reinforcing bead 171 are integrally formed on the rotor body 1, but not limited thereto. Further, the number of the third slit grooves 16 is at least two, and the number of the fourth slit grooves 17 is equal to the number of the third slit grooves 16 and corresponds to one.
As an embodiment, as shown in fig. 2, a tangential plane 18 perpendicular to the d axis is disposed on the outer peripheral wall of the rotor body 1, and on a cross section perpendicular to the axis of the rotor body 1, the included angles between the two ends of the tangential plane 18 and the central line of the rotor body 1 are θ, where θ is 0.05τ.ltoreq.θ.ltoreq.0.2τ, where τ is the pole angle, i.e., τ=180 °/p, and p is the pole logarithm. Therefore, when the rotor body 1 is matched with the stator, the air gap between the position of the tangential surface 18 and the stator is enlarged, the magnetic resistance of the air gap is increased, so that magnetic flux is not easy to circulate, the d-axis entering the stator is reduced, and the d-axis magnetic flux is reduced.
As an alternative embodiment, as shown in fig. 1, a conductive ring 2 is also included. The conducting ring 2 is arranged at the end part of the rotor body 1, and when the slit grooves 11 at the two ends are the first slit grooves 13, and the first slit grooves 13 are filled with the conducting magnetism isolating material, the conducting ring 2 can be pressed against the conducting magnetism isolating material in the first slit grooves 13. When the slit groove 11 includes the second slit groove 15, and two second reinforcing ribs 151 are provided in the second slit groove 15, the two second reinforcing ribs 151 divide the second slit groove 15 into a second slit groove a152, a second slit groove b153 and a second slit groove c154 which are sequentially arranged along the q-axis extending direction, and the conductive magnetic shielding material is filled in each of the second slit groove a152 and the second slit groove c154, the conductive ring 2 can be pressed against the conductive magnetic shielding material in the second slit groove a152 and the second slit groove c 154. Preferably, the slit groove 11 further comprises a third slit groove 16 and a fourth slit groove 17, a third reinforcing rib 161 is arranged in the third slit groove 16 and divides the third slit groove 16 into a third slit groove a162 far from the shaft hole 14 and a third slit groove b163 close to the shaft hole 14, the third slit groove a162 is filled with conductive magnetism isolating material, a fourth reinforcing rib 171 is arranged in the fourth slit groove 17 and divides the fourth slit groove 17 into a fourth slit groove a172 far from the shaft hole 14 and a fourth slit groove b173 close to the shaft hole 14, the fourth slit groove a172 is filled with conductive magnetism isolating material, and the conductive ring 2 is pressed against the conductive magnetism isolating material in the third slit groove a162 and the fourth slit groove a 172. In this way, the conductive magnetism isolating materials in the first slit groove 13, the second slit groove a152, the second slit groove c154, the third slit groove a162 and the fourth slit groove a172 can be conducted through the conductive ring 2 to form a squirrel cage, so that asynchronous starting of the motor is realized.
Specifically, as shown in fig. 1, the conductive ring 2 has a heat radiation hole 21, and the second slit groove b153 is located inside the heat radiation hole 21 in a projection along the axial direction of the rotor body 1. Further, on a projection in the axial direction of the rotor body 1, the third slit groove b163 and the fourth slit groove b173 are located inside the heat radiation hole 21. In this way, the heat dissipation of the rotor body 1 can be performed by flowing through the second slit groove b153, the third slit groove b163, and the fourth slit groove b 173.
To achieve the object, the present invention provides in a further aspect an electric machine comprising a rotor assembly as described in the above embodiments. Specifically, a stator (not shown) is also included; the stator has a mounting hole in which the rotor body 1 in the rotor assembly is penetrated and coaxial with the mounting hole, and a distance between an outer wall of the rotor body 1 and an inner wall of the mounting hole in a radial direction of the rotor body 1 is H. When the rotor body 1 has the first reinforcing bead 131, the width of the first reinforcing bead 131 is L1 and h.ltoreq.l1.ltoreq.2h in a section perpendicular to the axis of the rotor body 1. When the rotor body 1 has the second reinforcing bead 151, the width of the second reinforcing bead 151 is L2 and h.ltoreq.l1.ltoreq.2h in a section perpendicular to the axis of the rotor body 1. When the rotor body 1 has the third reinforcing bead 161, the width of the third reinforcing bead 161 is L3 and h.ltoreq.l1.ltoreq.2h in a section perpendicular to the axis of the rotor body 1. This reduces the magnetic fluxes (magnetic fluxes) at the first reinforcing rib 131, the second reinforcing rib 151, the third reinforcing rib 161, and the fourth reinforcing rib 171, and ensures the mechanical strength of the rotor body 1, so that the rotor body 1 deforms.
The embodiment of the invention has the advantages of reasonable design, low cost, smoother q-axis magnetic flux, more obvious difference between d-axis magnetic flux and q-axis magnetic flux and further improved output power and efficiency.
The above description is only an example of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (27)
1. A rotor assembly, characterized in that:
comprises a rotor body (1), wherein the rotor body (1) is provided with a plurality of slit grooves (11);
On a section perpendicular to the axis of the rotor body (1), the slit grooves (11) extend along a straight line in a direction perpendicular to the d-axis, so that magnetic flux channels (12) parallel to the q-axis are formed between adjacent slit grooves (11);
A tangential plane (18) perpendicular to the d axis is arranged on the peripheral wall of the rotor body (1), and on a section perpendicular to the axis of the rotor body (1), the included angles between the two ends of the tangential plane (18) and the central connecting line of the rotor body (1) are theta, wherein theta is more than or equal to 0.05 tau and less than or equal to 0.2 tau, wherein tau is the polar angle, namely tau=180 degrees/p, and p is the polar logarithm.
2. The rotor assembly of claim 1, wherein:
a distance exists between the slit groove (11) and the outer peripheral wall of the rotor body (1).
3. The rotor assembly of claim 2, wherein:
on a section perpendicular to the axis of the rotor body (1), along the extending direction of the d axis, the slit grooves (11) at two ends are first slit grooves (13), and the first slit grooves (13) are filled with conductive magnetism isolating materials.
4. A rotor assembly as claimed in claim 3, wherein:
In a section perpendicular to the axis of the rotor body (1), the first slit groove (13) is in an axisymmetric pattern with the d-axis as the symmetry axis.
5. The rotor assembly of claim 4 wherein:
The first slit groove (13) is internally provided with a first reinforcing rib (131), and two ends of the first reinforcing rib (131) are connected to two opposite wall surfaces of the first slit groove (13) perpendicular to the d axis.
6. The rotor assembly of claim 5, wherein:
On a section perpendicular to the axis of the rotor body (1), the first reinforcing rib (131) is in an axisymmetric pattern with the d-axis as a symmetry axis.
7. The rotor assembly of claim 5, wherein:
the first reinforcing ribs (131) are integrally formed on the rotor body (1).
8. A rotor assembly as claimed in claim 3, wherein:
the rotor body (1) is provided with a shaft hole (14) coaxial with the rotor body (1), and the slit groove (11) comprises a second slit groove (15);
In a section perpendicular to the axis of the rotor body (1), the second slit groove (15) is located between the first slit groove (13) and the shaft hole (14).
9. The rotor assembly as recited in claim 8, wherein:
The second slit groove (15) is in an axisymmetric pattern with the d-axis as the symmetry axis on a section perpendicular to the axis of the rotor body (1).
10. A rotor assembly as claimed in claim 9, wherein
Two second reinforcing ribs (151) are arranged in the second slit groove (15), two ends of each second reinforcing rib (151) are connected to two opposite wall surfaces perpendicular to the d axis of the second slit groove (15), the second slit groove (15) is divided into a second slit groove a (152), a second slit groove b (153) and a second slit groove c (154) which are sequentially distributed along the q axis extending direction by the two second reinforcing ribs (151), and conductive magnetic isolation materials are filled in the second slit groove a (152) and the second slit groove c (154).
11. The rotor assembly as recited in claim 10, wherein:
On a section perpendicular to the axis of the rotor body (1), the two second reinforcing ribs (151) are symmetrical to each other with the d-axis as a symmetry axis.
12. The rotor assembly as recited in claim 10, wherein:
the second reinforcing ribs (151) are integrally formed on the rotor body (1).
13. The rotor assembly as recited in claim 8, wherein:
Between one of the first slit grooves (13) and the shaft hole (14), the number of the second slit grooves (15) is at least two.
14. The rotor assembly as recited in claim 8, wherein:
The slit groove (11) further comprises a third slit groove (16) and a fourth slit groove (17);
the third slit groove (16) and the fourth slit groove (17) are respectively arranged at two sides of the shaft hole (14), and the third slit groove (16) and the fourth slit groove (17) are symmetrical with each other with a d-axis as a symmetry axis.
15. The rotor assembly as recited in claim 14, wherein:
A third reinforcing rib (161) is arranged in the third slit groove (16), two ends of the third reinforcing rib (161) are connected to two opposite wall surfaces of the third slit groove (16) perpendicular to the d axis, so that the third slit groove (16) is divided into a third slit groove a (162) far away from the shaft hole (14) and a third slit groove b (163) close to the shaft hole (14), and the third slit groove a (162) is filled with a conductive magnetism isolating material;
The novel magnetic shielding structure is characterized in that a fourth reinforcing rib (171) is arranged in the fourth slit groove (17), two ends of the fourth reinforcing rib (171) are connected to two opposite wall surfaces of the fourth slit groove (17) perpendicular to the d axis, so that the fourth slit groove (17) is divided into a fourth slit groove a (172) far away from the shaft hole (14) and a fourth slit groove b (173) close to the shaft hole (14), and the fourth slit groove a (172) is filled with a conductive magnetic shielding material.
16. The rotor assembly of claim 15 wherein:
the third reinforcing rib (161) and the fourth reinforcing rib (171) are symmetrical to each other with a d-axis as a symmetry axis in a section perpendicular to the axis of the rotor body (1).
17. The rotor assembly of claim 15 wherein:
The third reinforcing rib (161) and/or the fourth reinforcing rib (171) are integrally formed on the rotor body (1).
18. The rotor assembly as recited in claim 14, wherein:
The number of the third slit grooves (16) is at least two, and the number of the fourth slit grooves (17) is equal to the number of the third slit grooves (16) and corresponds to one of the third slit grooves.
19. A rotor assembly as claimed in any one of claims 1 to 18, wherein:
Also comprises a conductive ring (2);
The conductive ring (2) is arranged at the end part of the rotor body (1), and when the slit grooves (11) at two ends are first slit grooves (13), and the first slit grooves (13) are filled with conductive magnetic isolation materials, the conductive ring (2) can be pressed and attached to the conductive magnetic isolation materials in the first slit grooves (13).
20. The rotor assembly as recited in claim 19, wherein:
When the slit groove (11) comprises a second slit groove (15), two second reinforcing ribs (151) are arranged in the second slit groove (15), the second slit groove (15) is divided into a second slit groove a (152), a second slit groove b (153) and a second slit groove c (154) which are sequentially distributed along the q-axis extending direction by the two second reinforcing ribs (151), and when the conductive magnetic isolation materials are filled in the second slit groove a (152) and the second slit groove c (154), the conductive ring (2) can be pressed on the conductive magnetic isolation materials in the second slit groove a (152) and the second slit groove c (154).
21. The rotor assembly as recited in claim 20, wherein:
the conductive ring (2) is provided with a heat dissipation hole (21),
The second slit groove b (153) is located within the heat radiation hole (21) on a projection in the axial direction of the rotor body (1).
22. The rotor assembly of claim 21 wherein:
When the rotor body (1) is provided with the shaft hole (14) coaxial with the rotor body (1), the slit groove (11) further comprises a third slit groove (16) and a fourth slit groove (17), a third reinforcing rib (161) is arranged in the third slit groove (16), the third slit groove (16) is divided into a third slit groove a (162) far away from the shaft hole (14) and a third slit groove b (163) close to the shaft hole (14), the third slit groove a (162) is filled with a conductive magnetism isolating material, the fourth slit groove (17) is internally provided with a fourth reinforcing rib (171), the fourth slit groove (17) is divided into a fourth slit groove a (172) far away from the shaft hole (14) and a fourth slit groove b (173) close to the shaft hole (14), the fourth slit groove a (172) is filled with a conductive magnetism isolating material, and the conductive magnetism isolating ring (2) is adhered to the fourth slit groove a (172).
23. The rotor assembly as recited in claim 22, wherein:
The third slit groove b (163) and the fourth slit groove b (173) are located within the heat dissipation hole (21) on a projection in the axial direction of the rotor body (1).
24. An electric motor, characterized in that:
a rotor assembly comprising any one of claims 1 to 23.
25. The electric machine of claim 24, wherein:
The motor also comprises a stator;
the stator is provided with a mounting hole, the rotor body (1) in the rotor assembly is arranged in the mounting hole in a penetrating way and is coaxial with the mounting hole, and the distance between the outer wall of the rotor body (1) and the inner wall of the mounting hole in the radial direction of the rotor body (1) is H;
When the rotor body (1) has a first reinforcing rib (131), the width of the first reinforcing rib (131) is L1 and H.ltoreq.L1.ltoreq.2H on a section perpendicular to the axis of the rotor body (1).
26. The electric machine of claim 25, wherein:
when the rotor body (1) has a second reinforcing rib (151), the width of the second reinforcing rib (151) is L2 and H.ltoreq.L2.ltoreq.2H in a section perpendicular to the axis of the rotor body (1).
27. The electric machine of claim 25, wherein:
When the rotor body (1) has a third reinforcing rib (161), the third reinforcing rib (161) has a width L3 and H.ltoreq.L3.ltoreq.2H in a cross section perpendicular to the axis of the rotor body (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810771242.9A CN108711968B (en) | 2018-07-13 | 2018-07-13 | Rotor assembly and motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810771242.9A CN108711968B (en) | 2018-07-13 | 2018-07-13 | Rotor assembly and motor |
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| CN108711968B true CN108711968B (en) | 2024-08-30 |
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| CN112653265B (en) * | 2020-12-17 | 2022-09-13 | 珠海格力电器股份有限公司 | Rotor structure, motor and rotor machining method |
| CN112713741A (en) * | 2020-12-21 | 2021-04-27 | 中车永济电机有限公司 | Self-starting three-phase synchronous reluctance motor |
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| CN108011459A (en) * | 2017-11-30 | 2018-05-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor structure, asynchronous starting synchronous magnetic resistance motor and compressor |
| CN208337260U (en) * | 2018-07-13 | 2019-01-04 | 珠海格力电器股份有限公司 | Rotor assembly and motor |
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| JP3775298B2 (en) * | 2001-12-19 | 2006-05-17 | 三菱電機株式会社 | Synchronous motor, blower, compressor, refrigeration / air-conditioning equipment |
| CN202142924U (en) * | 2011-08-05 | 2012-02-08 | 珠海格力电器股份有限公司 | Motor rotor and motor with same |
| FR2980056B1 (en) * | 2011-09-14 | 2014-05-16 | Renault Sas | RELUCTANCE MACHINE HAVING COOLING MEANS BY A FLOW OF GAS OR LIQUID |
| JP2013132164A (en) * | 2011-12-22 | 2013-07-04 | Sharp Corp | Permanent magnet motor |
| WO2015132991A1 (en) * | 2014-03-05 | 2015-09-11 | 三菱電機株式会社 | Synchronous reluctance motor |
| CN204145239U (en) * | 2014-09-17 | 2015-02-04 | 安徽美芝精密制造有限公司 | Permagnetic synchronous motor and rotor assembly thereof |
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| CN108110920A (en) * | 2017-12-14 | 2018-06-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Asynchronous starting synchronous magnetic resistance motor rotor, motor and compressor |
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