CN114640200A - Permanent magnet motor rotor and permanent magnet motor - Google Patents
Permanent magnet motor rotor and permanent magnet motor Download PDFInfo
- Publication number
- CN114640200A CN114640200A CN202210179295.8A CN202210179295A CN114640200A CN 114640200 A CN114640200 A CN 114640200A CN 202210179295 A CN202210179295 A CN 202210179295A CN 114640200 A CN114640200 A CN 114640200A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- magnetic pole
- mounting groove
- magnet magnetic
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000004888 barrier function Effects 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- 230000005347 demagnetization Effects 0.000 abstract description 40
- 230000004907 flux Effects 0.000 description 10
- 238000002955 isolation Methods 0.000 description 10
- 125000006850 spacer group Chemical group 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000002427 irreversible effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a permanent magnet motor rotor and a permanent magnet motor, comprising: the rotor comprises a rotor core, a first mounting groove and a second mounting groove, wherein the first mounting groove and the second mounting groove are arranged in parallel; a first permanent magnet magnetic pole is arranged in the first mounting groove; the second permanent magnet magnetic pole is installed in the second mounting groove corresponding to the position of the first permanent magnet magnetic pole, at least two second auxiliary permanent magnet magnetic poles are further arranged in the second mounting groove, and the second auxiliary permanent magnet magnetic poles are symmetrically distributed on two opposite sides of the second permanent magnet magnetic pole. The permanent magnet motor rotor and the permanent magnet motor can greatly improve the demagnetization resistance of the rotor, simultaneously improve the problem of inconsistent demagnetization of the magnetic poles of the permanent magnet and improve the demagnetization consistency of the magnetic poles of multiple layers.
Description
Technical Field
The invention relates to the technical field of synchronous motors, in particular to a permanent magnet motor rotor and a permanent magnet motor.
Background
At present, the permanent magnet motor is not only an important energy power device, but also a key basic component of advanced manufacturing, electric power equipment, electric vehicles, intelligent electric appliances and other high-end equipment. Nowadays, the application of the permanent magnet motor is more and more extensive, and the permanent magnet motor can be seen in the figure of household appliances, electric automobiles, space shuttles and the like. More and more high-end key application fields also provide new requirements for key indexes such as the reliability of the permanent magnet motor, and the like, and the requirements for the reliability of the motor are extremely high for electric automobile driving, aviation generators, large-scale wind power generation equipment and the like. The important factor in the reliability of a permanent magnet motor is the magnetic property of the permanent magnet. Three asymmetric short circuit faults, inverter faults and the like all generate extremely large impact current in an electromechanical system, and then large demagnetization magnetomotive force is excited on a direct-axis (d-axis) magnetic circuit of a permanent magnet motor, so that irreversible demagnetization of a permanent magnet is caused, time and labor are wasted in troubleshooting, operation and maintenance and the like, and the life and property safety of a user is even endangered.
In the related art, in order to avoid the problem of irreversible demagnetization of the permanent magnet, the permanent magnet is generally thickened when the permanent magnet is designed at present, or a high-coercivity rare earth permanent magnet is adopted, so that the problem of loss of magnetism of a part of permanent magnet motors can be solved, the consumption of the permanent magnet needs to be increased, high-grade magnetic steel needs to be used instead, and the like, and the price is low under the market condition that rare earth is more and more scarce nowadays.
Therefore, there is a need for a new permanent magnet motor rotor and a new permanent magnet motor to overcome the above problems.
Disclosure of Invention
The embodiment of the invention provides a permanent magnet motor rotor and a permanent magnet motor, and aims to solve the problem that in the related technology, the production cost is increased due to the fact that the use amount of permanent magnets is increased or high-grade magnetic steel needs to be replaced.
In a first aspect, a permanent magnet motor rotor is provided, comprising: the rotor comprises a rotor core, a first mounting groove and a second mounting groove, wherein the first mounting groove and the second mounting groove are arranged in parallel; a first permanent magnet magnetic pole is arranged in the first mounting groove; the second permanent magnet magnetic pole is installed in the second mounting groove corresponding to the position of the first permanent magnet magnetic pole, at least two second auxiliary permanent magnet magnetic poles are further arranged in the second mounting groove, and the second auxiliary permanent magnet magnetic poles are symmetrically distributed on two opposite sides of the second permanent magnet magnetic pole.
In some embodiments, the magnetizing direction of the second auxiliary permanent magnet pole is a quadrature magnetic path direction along the center of the second auxiliary permanent magnet pole; and the magnetizing direction of the second permanent magnet magnetic pole is along the direction of a connecting line between the center of the second permanent magnet magnetic pole and the center of the rotor iron core.
In some embodiments, a first magnetic pole array spacer is disposed between the second permanent magnet magnetic pole and the second auxiliary permanent magnet magnetic pole, and the first magnetic pole array spacer is air or a non-magnetic-conductive adhesive material.
In some embodiments, first air magnetic barriers are further arranged in the first mounting groove, and the first air magnetic barriers are symmetrically distributed on two opposite sides of the magnetic pole of the first permanent magnet; and second air magnetic barriers are arranged in the second mounting groove, are symmetrically distributed at two opposite ends of the second mounting groove, and are positioned at two opposite sides of the second auxiliary permanent magnet magnetic pole.
In some embodiments, the second mounting groove includes a first groove and second grooves on opposite sides of the first groove, the second grooves being disposed obliquely with respect to the first groove; the second permanent magnet magnetic pole is arranged in the first groove, the second auxiliary permanent magnet magnetic pole and the second air magnetic barrier are positioned in the second groove, the second auxiliary permanent magnet magnetic pole is positioned at the joint of the second groove and the first groove, and the cross section of the second auxiliary permanent magnet magnetic pole is fan-shaped or triangular.
In some embodiments, the permanent magnet motor rotor further includes a third mounting groove, the third mounting groove is disposed side by side with the second mounting groove, a third permanent magnet magnetic pole is installed in a position corresponding to the second permanent magnet magnetic pole in the third mounting groove, at least two third auxiliary permanent magnet magnetic poles are further disposed in the third mounting groove, and the third auxiliary permanent magnet magnetic poles are symmetrically distributed on two opposite sides of the third permanent magnet magnetic pole.
In some embodiments, a second magnetic pole array spacer is disposed between the third permanent magnet magnetic pole and the third auxiliary permanent magnet magnetic pole, and the second magnetic pole array spacer is air or a non-magnetic-conductive adhesive material.
In some embodiments, the third mounting groove and the first mounting groove are located on opposite sides of the second mounting groove, and a first magnetic pole array spacer is arranged between the second permanent magnet magnetic pole and the second auxiliary permanent magnet magnetic pole; the first magnetic pole array spacing part is arranged on the second mounting groove in a extending direction, the thickness of the first magnetic pole array spacing part in the extending direction is larger than that of the second magnetic pole array spacing part, and the cross section size of the second auxiliary permanent magnet magnetic pole is larger than that of the third auxiliary permanent magnet magnetic pole.
In some embodiments, the first permanent magnet magnetic pole, the second permanent magnet magnetic pole, and the second auxiliary permanent magnet magnetic pole are all fixed to the rotor core by an acrylic acid AB glue.
In a second aspect, a permanent magnet electric machine is provided, comprising a permanent magnet electric machine rotor as described above.
The technical scheme provided by the invention has the beneficial effects that:
the embodiment of the invention provides a permanent magnet motor rotor and a permanent magnet motor, wherein the second auxiliary permanent magnet magnetic poles are symmetrically arranged on two opposite sides of the second permanent magnet magnetic pole, and the added second auxiliary permanent magnet magnetic poles can increase the quadrature axis magnetic flux, so that the saturation degree of a rotor iron core is increased, the magnetic resistance of a demagnetization magnetic circuit is increased, the demagnetization magnetic fields acting on the first permanent magnet magnetic pole and the second permanent magnet magnetic pole are weakened, and the demagnetization resistance of the rotor is greatly increased.
Simultaneously, because the second mounting groove is inclined to and is close to the stator, increased the supplementary permanent magnet magnetic pole of second in the second mounting groove, can improve the demagnetization of first permanent magnet magnetic pole and second permanent magnet magnetic pole, promote multilayer magnetic pole demagnetization uniformity.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a quarter of a rotor of a permanent magnet motor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a permanent magnet motor according to an embodiment of the present invention;
fig. 3 is a cloud view of demagnetization flux densities of a permanent magnet motor in the related art;
fig. 4 is a cloud diagram of demagnetization flux densities of a permanent magnet motor according to an embodiment of the present invention;
fig. 5 is a line graph of a demagnetization current of a permanent magnet motor in the related art;
fig. 6 is a line diagram of a demagnetization current of a permanent magnet motor according to an embodiment of the present invention.
In the figure:
100. a permanent magnet motor rotor;
1. a rotor core; 2. a first mounting groove; 21. a first permanent magnet pole; 22. a first air magnetic barrier;
3. a second mounting groove; 31. a second permanent magnet pole; 32. a second auxiliary permanent magnet pole; 33. a first magnetic pole array spacer; 34. a second air magnetic barrier;
4. a third mounting groove; 41. a third permanent magnet pole; 42. a third auxiliary permanent magnet pole; 43. a second magnetic pole array spacer; 44. a third air magnetic barrier;
5. a first magnetic isolation bridge; 6. a second magnetic isolation bridge; 7. a third magnetic isolation bridge;
200. a stator core; 201. and a stator winding.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a permanent magnet motor rotor and a permanent magnet motor, which can solve the problem that the production cost is increased due to the fact that the use amount of permanent magnets is increased or high-grade magnetic steel needs to be replaced in the related technology.
Referring to fig. 1 and 2, a rotor 100 of a permanent magnet motor according to an embodiment of the present invention may include: the permanent magnet motor rotor 100 comprises a rotor core 1, wherein the rotor core 1 is provided with a first mounting groove 2 and a second mounting groove 3 which are arranged side by side, the first mounting groove 2 is deviated to be close to the center of the rotor core 1 relative to the second mounting groove 3, namely, when the permanent magnet motor rotor 100 is mounted on a motor, the second mounting groove 3 is deviated to be close to a stator, and the first mounting groove 2 is deviated to be far away from the stator; a first permanent magnet magnetic pole 21 can be arranged in the first mounting groove 2; the second installation groove 3 is provided with at least two second auxiliary permanent magnet poles 32, the second auxiliary permanent magnet poles 32 are symmetrically distributed on two opposite sides of the second permanent magnet pole 31, namely, the second permanent magnet pole 31 is equivalent to a main permanent magnet pole, the auxiliary permanent magnet poles are added on two opposite sides of the main permanent magnet pole in the embodiment, so that the magnetic flux of a quadrature axis magnetic circuit can be increased, the saturation degree of the rotor core 1 is increased, the demagnetization current is increased, the demagnetization magnetomotive force is increased, and the demagnetization magnetic field acting on the first permanent magnet pole 21 and the second permanent magnet pole 31 is weakened due to the increase of the saturation degree of the rotor core 1 and the increase of the magnetic resistance of the magnetic circuit, the demagnetization resistance of the rotor is greatly increased.
In addition, because demagnetization is caused by armature reaction of the stator winding 201 (the stator armature generates a magnetic field opposite to the magnetizing direction of the permanent magnet), the closer to the stator, the larger the magnetic field opposite to the permanent magnet is, the permanent magnet far from the stator is less affected by the demagnetizing field, the second mounting groove 3 is deviated to be close to the stator and is greatly influenced by the armature reaction, the first mounting groove 2 is deviated to be far from the stator and is slightly influenced by the armature reaction, the second permanent magnet pole 31 is affected more seriously by demagnetization than the first permanent magnet pole 21, and in the present embodiment, by adding the second auxiliary permanent magnet pole 32 in the second installation groove 3, the magnetic flux of the quadrature magnetic circuit can be increased, the demagnetization of the second permanent magnet magnetic pole 31 can be improved, and then reduce the demagnetization gap of permanent magnet magnetic pole in first mounting groove 2 and second mounting groove 3, promote the demagnetization uniformity of multilayer magnetic pole totality.
Referring to fig. 1, in some embodiments, the magnetizing direction of the second auxiliary permanent magnet pole 32 is preferably a quadrature magnetic path direction along the center of the second auxiliary permanent magnet pole 32, i.e. a quadrature magnetomotive force direction, wherein a quadrature axis is a direction perpendicular to a direct axis at the position, and when the magnetizing direction of the second auxiliary permanent magnet pole 32 is along the quadrature magnetic path direction, the quadrature magnetic path is the largest, so that demagnetization resistance can be maximized; the magnetizing direction of the second permanent magnet magnetic pole 31 is along the direction of the connecting line between the center of the second permanent magnet magnetic pole 31 and the center of the rotor core 1, that is, the magnetizing direction of the second permanent magnet magnetic pole 31 is along the direction of the direct axis, and when the magnetizing direction of the second auxiliary permanent magnet magnetic pole 32 is along the direction of the quadrature axis magnetic circuit, the direct axis magnetic circuit flux is not affected basically, so that the saturation degree of the rotor core 1 can be increased to the maximum extent under the condition that the direct axis magnetic circuit flux is not affected basically (taking the design as an example, the air gap flux density is not changed basically, and the torque ripple change is less than 1%).
Referring to fig. 1, in some alternative embodiments, a first magnetic pole array spacer 33 may be disposed between the second permanent magnet pole 31 and the second auxiliary permanent magnet pole 32, and the first magnetic pole array spacer 33 may be air or a non-magnetic conductive adhesive material. When the permanent magnet motor rotor 100 needs to be installed in a low-speed motor, the first magnetic pole array spacing part 33 is preferably air, and when the permanent magnet motor rotor 100 needs to be installed in a high-speed motor, the first magnetic pole array spacing part 33 is made of a non-magnetic-conductive adhesive material, wherein the non-magnetic-conductive adhesive material is preferably epoxy resin AB glue, and the non-magnetic-conductive adhesive material can ensure the structural strength of the second auxiliary permanent magnet magnetic pole 32 after installation.
Referring to fig. 1, in some embodiments, first air magnetic barriers 22 may be further disposed in the first mounting groove 2, and the first air magnetic barriers 22 are symmetrically distributed on two opposite sides of the first permanent magnet pole 21; be equipped with second air magnetic barrier 34 in the second mounting groove 3, second air magnetic barrier 34 symmetric distribution in the relative both ends of second mounting groove 3, just second air magnetic barrier 34 with second permanent magnet magnetic pole 31 is located the relative both sides of second auxiliary permanent magnet magnetic pole 32, in this embodiment, through set up the air magnetic barrier in each mounting groove, can reduce rotor core 1's weight to reduce silicon steel sheet quantity and bearing structure cost, reduce cost can also increase the convex ratio simultaneously, improves motor torque output capacity.
Further, referring to fig. 1, the second mounting groove 3 may include a first groove and second grooves located at two opposite sides of the first groove, that is, two sides of each first groove are respectively connected to one second groove, and the second grooves are obliquely arranged relative to the first grooves, so that the first grooves and the two second grooves form a U-shaped structure; second permanent magnet magnetic pole 31 install in first groove, second supplementary permanent magnet magnetic pole 32 with second air magnetic barrier 34 is located the second groove, just second supplementary permanent magnet magnetic pole 32 is located the second groove with the department that meets in first groove, the cross sectional shape of second supplementary permanent magnet magnetic pole 32 is fan-shaped or triangle-shaped, in this embodiment, because second supplementary permanent magnet magnetic pole 32 sets up in the corner in first groove and second groove, designs into fan-shaped or triangle-shaped with the structure of second supplementary permanent magnet magnetic pole 32, except being convenient for process the chamfer, still is convenient for install second supplementary permanent magnet magnetic pole 32 in the corner, promotes the convenience of assembly. Of course, in other embodiments, the second auxiliary permanent magnet pole 32 may be provided in a circular, square, or any other shape.
Referring to fig. 1, in some embodiments, the permanent magnet motor rotor 100 may further include a third mounting groove 4, where the first mounting groove 2, the second mounting groove 3 and the third mounting groove 4 may have similar structural shapes, the third mounting groove 4 and the second mounting groove 3 are arranged side by side, a third permanent magnet pole 41 is installed in the third mounting groove 4 at a position corresponding to the second permanent magnet pole 31, at least two third auxiliary permanent magnet poles 42 are further disposed in the third mounting groove 4, and the third auxiliary permanent magnet poles 42 are symmetrically distributed on two opposite sides of the third permanent magnet pole 41, in this embodiment, a third mounting groove 4 is further added on the basis of the above technical solution, so that at least three layers of permanent magnet structures are formed in the rotor core 1, and meanwhile, the third auxiliary permanent magnet pole 42 disposed in the third mounting groove 4 may reduce the third permanent magnet pole 41, the second permanent magnet pole 31, and the third permanent magnet pole 41, The demagnetization difference between the first permanent magnet poles 21 improves the demagnetization consistency, and the demagnetization resistance of the rotor can be further increased. In this embodiment, by adopting the above design scheme, the magnetic densities of the first permanent magnet magnetic pole 21 and the third permanent magnet magnetic pole 41 can be increased to some extent, the magnetic density of the second permanent magnet magnetic pole 31 can be decreased to some extent, and the difference between the magnetic densities of the three layers is reduced, so that the robustness of the motor is enhanced, and the motor can still run for a long time after a fault occurs.
On the basis of the above technical solution, referring to fig. 1, a second magnetic pole array spacing portion 43 may be disposed between the third permanent magnet magnetic pole 41 and the third auxiliary permanent magnet magnetic pole 42, where the second magnetic pole array spacing portion 43 is air or a non-magnetic conductive adhesive material, where when the permanent magnet motor rotor 100 needs to be installed in a low-speed motor, the first magnetic pole array spacing portion 33 is preferably air, and when the permanent magnet motor rotor 100 needs to be installed in a high-speed motor, the first magnetic pole array spacing portion 33 is a non-magnetic conductive adhesive material, where the non-magnetic conductive adhesive material is preferably epoxy AB glue.
Further, a third air magnetic barrier 44 is disposed in the third mounting groove 4, the third air magnetic barrier 44 is symmetrically distributed at two opposite ends of the third mounting groove 4, and the third air magnetic barrier 44 and the third permanent magnet magnetic pole 41 are respectively located at two opposite sides of the third auxiliary permanent magnet magnetic pole 42.
Preferably, referring to fig. 1, the third mounting groove 4 and the first mounting groove 2 may be located on opposite sides of the second mounting groove 3, that is, the third mounting groove 4 is closer to the stator than the second mounting groove 3, and a first magnetic pole array spacer 33 is disposed between the second permanent magnet magnetic pole 31 and the second auxiliary permanent magnet magnetic pole 32; the thickness of the first magnetic pole array spacing part 33 along the extending direction of the second mounting groove 3 is larger than that of the second magnetic pole array spacing part 43, and the cross section size of the second auxiliary permanent magnet magnetic pole 32 is larger than that of the third auxiliary permanent magnet magnetic pole 42, and as the space at the second mounting groove 3 is relatively large, the size of the second auxiliary permanent magnet magnetic pole 32 can be designed to be relatively large, so as to realize optimal demagnetization resistance; in addition, in this embodiment, the third auxiliary permanent magnet magnetic pole 42 is provided to improve the demagnetization resistance of the third layer of permanent magnet magnetic pole, so that the third permanent magnet magnetic pole 41 can be thinner than the first permanent magnet magnetic pole 21 and the second permanent magnet magnetic pole 31, which can save cost.
In some embodiments, referring to fig. 1, the first permanent magnet pole 21, the second permanent magnet pole 31, and the second auxiliary permanent magnet pole 32 may be bonded and fixed to the rotor core 1 by an acrylic AB glue, wherein a surface of each of the first permanent magnet pole 21, the second permanent magnet pole 31, and the second auxiliary permanent magnet pole 32 adjacent to the rotor core 1 may be coated with the acrylic AB glue, so that the first permanent magnet pole 21, the second permanent magnet pole 31, and the second auxiliary permanent magnet pole 32 can be fixed to the rotor core 1 more stably.
Further, the permanent magnet motor rotor 100 may further include magnetic isolation bridges symmetrically disposed at two opposite ends of each mounting groove, wherein a first magnetic isolation bridge 5 is disposed at an outer side corresponding to the first mounting groove 2, when the rotor is mounted in the motor, the first magnetic isolation bridge 5 is located between a terminal of the first air magnetic barrier 22 and an air gap (i.e., between a stator and a rotor of the motor), a second magnetic isolation bridge 6 is disposed at an outer side corresponding to the second mounting groove 3, when the rotor is mounted in the motor, the second magnetic isolation bridge 6 is located between a terminal of the second air magnetic barrier 34 and the air gap (i.e., between the stator and the rotor of the motor), a third magnetic isolation bridge 7 is disposed at an outer side corresponding to the third mounting groove 4, and when the rotor is mounted in the motor, the third magnetic isolation bridge 7 is located between a terminal of the third air magnetic barrier 44 and the air gap (i.e., between the stator and the rotor of the air gap motor). Rotor core 1 can be folded by the silicon steel sheet with magnetism isolating bridge an organic whole and form, under the prerequisite of guaranteeing rotor mechanical structure intensity, magnetism isolating bridge's thickness is thinner the biggest for rotor magnetic circuit main flux.
The application only shows the embodiment that the rotor is provided with three layers of permanent magnet poles at most, and certainly, in other embodiments, more layers of permanent magnet poles such as four layers, five layers and the like can be arranged on the rotor to meet the actual requirement, and any layer can be independently selected to be provided with the auxiliary permanent magnet poles or not provided with the auxiliary permanent magnet poles.
Further, in this embodiment, the first permanent magnet magnetic pole 21, the second permanent magnet magnetic pole 31, and the third permanent magnet magnetic pole 41 are preferably arranged in the rotor core 1 in a straight-line built-in manner, and the cross section is preferably rectangular, the magnetizing direction is the connecting line direction of the respective center and the rotor center, and each permanent magnet magnetic pole may be processed in a segmented manner in the axial direction. The rotor core 1 is preferably formed by laminating silicon steel sheets; the first permanent magnet magnetic pole 21, the second permanent magnet magnetic pole 31, the third permanent magnet magnetic pole 41 and the auxiliary permanent magnet magnetic pole can all adopt ferrite or samarium cobalt or neodymium iron boron permanent magnets. And, the material of two symmetrical second auxiliary permanent magnet magnetic poles 32 in the second mounting groove 3 is the same, the structure is unanimous to guarantee the symmetry of motor magnetic circuit, of course, in some very few motors that require structure and magnetic circuit asymmetry also can set up two second auxiliary permanent magnet magnetic poles 32 as asymmetric structure. The materials and the structures of the two symmetrical third auxiliary permanent magnet poles 42 in the third mounting groove 4 are correspondingly the same.
Referring to fig. 2, an embodiment of the present invention further provides a permanent magnet motor, which may include the permanent magnet motor rotor 100 described above, and the permanent magnet motor may further include a stator core 200, where the stator core 200 is provided with a stator winding 201, and the permanent magnet motor rotor 100 is provided inside the stator core 200. Because this application has carried out optimal design to permanent-magnet machine rotor 100, permanent-magnet machine rotor 100 that make after installing permanent-magnet machine, permanent-magnet machine can increase anti demagnetization ability by a wide margin when keeping basic electromagnetic property, and the magnetic pole demagnetization uniformity also obtains promoting in addition.
Referring to fig. 3 and 4, a cloud chart comparing demagnetization flux densities before and after the application of the invention is shown, the working condition of three times of short circuit impact current is used for simulation, the residual magnetism of the magnetic pole of the permanent magnet in the magnetizing direction is observed, a knee point (inflection point) is used as a boundary line, irreversible demagnetization is generated when the area is lower than the inflection point, and the graph is represented by dark color; . It can be obviously seen that the irreversible demagnetization of the permanent magnet can be obviously reduced by adopting the method.
Referring to fig. 5 and fig. 6, a comparison line graph of demagnetization currents of magnetic poles of each layer before and after the application of the invention is shown, after the method disclosed by the invention is adopted, the obvious improvement of demagnetization consistency can be visually observed from the graph, meanwhile, the demagnetization currents of three layers of permanent magnets, which are generated by irreversible demagnetization and reach 3%, are all about 33A, and the overall demagnetization current of the motor is increased from 27A to 33A.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is noted that, in the present invention, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A permanent magnet motor rotor, comprising:
the rotor comprises a rotor core (1), wherein the rotor core (1) is provided with a first mounting groove (2) and a second mounting groove (3) which are arranged side by side, and the first mounting groove (2) is deviated to be close to the center of the rotor core (1) relative to the second mounting groove (3);
a first permanent magnet magnetic pole (21) is arranged in the first mounting groove (2);
correspond in second mounting groove (3) second permanent magnet magnetic pole (31) are installed to the position of first permanent magnet magnetic pole (21), just still be equipped with two at least supplementary permanent magnet magnetic poles of second (32) in second mounting groove (3), supplementary permanent magnet magnetic pole of second (32) symmetric distribution in the relative both sides of second permanent magnet magnetic pole (31).
2. The permanent magnet motor rotor of claim 1, wherein:
the magnetizing direction of the second auxiliary permanent magnet magnetic pole (32) is a quadrature magnetic path direction along the center of the second auxiliary permanent magnet magnetic pole (32);
and the magnetizing direction of the second permanent magnet magnetic pole (31) is along the direction of a connecting line between the center of the second permanent magnet magnetic pole (31) and the center of the rotor iron core (1).
3. The permanent magnet motor rotor of claim 1, wherein:
a first magnetic pole array spacing part (33) is arranged between the second permanent magnet magnetic pole (31) and the second auxiliary permanent magnet magnetic pole (32), and the first magnetic pole array spacing part (33) is made of air or non-magnetic-conductive bonding materials.
4. The permanent magnet motor rotor of claim 1, wherein:
a first air magnetic barrier (22) is further arranged in the first mounting groove (2), and the first air magnetic barrier (22) is symmetrically distributed on two opposite sides of the first permanent magnet magnetic pole (21);
and second air magnetic barriers (34) are arranged in the second mounting groove (3), the second air magnetic barriers (34) are symmetrically distributed at two opposite ends of the second mounting groove (3), and the second air magnetic barriers (34) and the second permanent magnet magnetic poles (31) are positioned at two opposite sides of the second auxiliary permanent magnet magnetic poles (32).
5. The permanent magnet electric machine rotor of claim 4, wherein:
the second mounting groove (3) comprises a first groove and second grooves positioned on two opposite sides of the first groove, and the second grooves are obliquely arranged relative to the first groove;
the second permanent magnet magnetic pole (31) is installed in the first groove, the second auxiliary permanent magnet magnetic pole (32) and the second air magnetic barrier (34) are located in the second groove, the second auxiliary permanent magnet magnetic pole (32) is located at the joint of the second groove and the first groove, and the cross section of the second auxiliary permanent magnet magnetic pole (32) is fan-shaped or triangular.
6. The permanent magnet motor rotor of claim 1, wherein:
the permanent magnet motor rotor still includes third mounting groove (4), third mounting groove (4) with second mounting groove (3) set up side by side, just correspond in third mounting groove (4) third permanent magnet magnetic pole (41) are installed to the position of second permanent magnet magnetic pole (31), still be equipped with two at least third supplementary permanent magnet magnetic poles (42) in third mounting groove (4), third supplementary permanent magnet magnetic pole (42) symmetric distribution in the relative both sides of third permanent magnet magnetic pole (41).
7. The permanent magnet electric machine rotor of claim 6, wherein:
a second magnetic pole array spacing part (43) is arranged between the third permanent magnet magnetic pole (41) and the third auxiliary permanent magnet magnetic pole (42), and the second magnetic pole array spacing part (43) is made of air or non-magnetic-conductive bonding material.
8. The permanent magnet electric machine rotor of claim 7, wherein:
the third mounting groove (4) and the first mounting groove (2) are positioned at two opposite sides of the second mounting groove (3), and a first magnetic pole array spacing part (33) is arranged between the second permanent magnet magnetic pole (31) and the second auxiliary permanent magnet magnetic pole (32);
the thickness of the first magnetic pole array spacing part (33) in the extending direction of the second mounting groove (3) is larger than that of the second magnetic pole array spacing part (43), and the cross section size of the second auxiliary permanent magnet magnetic pole (32) is larger than that of the third auxiliary permanent magnet magnetic pole (42).
9. The permanent magnet electric machine rotor of claim 1, wherein:
the first permanent magnet magnetic pole (21), the second permanent magnet magnetic pole (31) and the second auxiliary permanent magnet magnetic pole (32) are all adhered and fixed with the rotor core (1) through acrylic acid AB glue.
10. A permanent magnet machine, characterized in that it comprises a rotor of a permanent magnet machine according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179295.8A CN114640200B (en) | 2022-02-25 | 2022-02-25 | Permanent magnet motor rotor and permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179295.8A CN114640200B (en) | 2022-02-25 | 2022-02-25 | Permanent magnet motor rotor and permanent magnet motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114640200A true CN114640200A (en) | 2022-06-17 |
| CN114640200B CN114640200B (en) | 2024-05-28 |
Family
ID=81946876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210179295.8A Active CN114640200B (en) | 2022-02-25 | 2022-02-25 | Permanent magnet motor rotor and permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114640200B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116633051A (en) * | 2023-07-24 | 2023-08-22 | 中国第一汽车股份有限公司 | Motor rotor, permanent magnet synchronous motor and vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62217846A (en) * | 1986-03-17 | 1987-09-25 | Hitachi Ltd | Permanent magnet field-type dc machine |
| CN103475123A (en) * | 2011-12-28 | 2013-12-25 | 瑞美技术有限责任公司 | Internal permanent magnet electric machines |
-
2022
- 2022-02-25 CN CN202210179295.8A patent/CN114640200B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62217846A (en) * | 1986-03-17 | 1987-09-25 | Hitachi Ltd | Permanent magnet field-type dc machine |
| CN103475123A (en) * | 2011-12-28 | 2013-12-25 | 瑞美技术有限责任公司 | Internal permanent magnet electric machines |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116633051A (en) * | 2023-07-24 | 2023-08-22 | 中国第一汽车股份有限公司 | Motor rotor, permanent magnet synchronous motor and vehicle |
| CN116633051B (en) * | 2023-07-24 | 2023-10-24 | 中国第一汽车股份有限公司 | Motor rotor, permanent magnet synchronous motor and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114640200B (en) | 2024-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1956293B (en) | Method and apparatus for assembling a permanent magnet pole assembly | |
| CN112564346B (en) | High-torque-density axial magnetic field permanent magnet motor rotor structure and motor thereof | |
| CN102931802B (en) | A kind of complementary-type fault-tolerant linear | |
| CN101277053A (en) | Mixed field excitation type flux switch motor | |
| CN112491177B (en) | Anti-demagnetization rotor and MW-level permanent magnet synchronous wind driven generator | |
| CN109167502B (en) | Permanent magnet auxiliary cage barrier rotor synchronous motor | |
| CN103248148A (en) | Mixed excitation stator surface-mounted double-salient motor | |
| CN103248189A (en) | Bipolar stator-surface-mounting type permanent magnet motor | |
| CN114640200B (en) | Permanent magnet motor rotor and permanent magnet motor | |
| CN103178672B (en) | Stator-surface-mounted type doubly salient permanent magnet motor adopting modularized rotor | |
| CN109245468B (en) | Birotor synchronous motor adopting permanent magnet auxiliary cage barrier rotor | |
| CN111245187B (en) | Annular winding dual-rotor flux reversal motor | |
| CN110138165B (en) | Composite magnetic circuit stator split type axial permanent magnet motor | |
| CN217445098U (en) | Oriented silicon steel sheet rotor core and synchronous reluctance motor | |
| CN214314991U (en) | Topological structure of embedded composite permanent magnet type double-stator brushless motor | |
| CN110571956A (en) | Permanent magnet four-pole three-phase synchronous generator rotor | |
| CN215835213U (en) | Permanent magnet synchronous motor rotor without magnetic isolation bridge salient poles | |
| CN219181252U (en) | Synchronous reluctance motor stator and rotor structure without magnetic field eddy current loss | |
| CN101227111A (en) | Mixed power type generator | |
| CN210380423U (en) | Permanent magnet four-pole three-phase synchronous generator rotor | |
| CN216904468U (en) | Rotor, permanent-magnet machine and vehicle | |
| CN203554245U (en) | Salient pole type permanent magnet power generator with compound excitation characteristic | |
| CN110176846B (en) | Switch flux permanent magnet motor with connecting bridge | |
| CN217087602U (en) | Block type iron core structure with embedded permanent magnets in outer rotor type motor rotor | |
| CN109167501B (en) | Mixed rotor outer rotor synchronous motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |