CN118157347A - Asymmetric rotor new energy vehicle motor based on magnetic axis double offset - Google Patents
Asymmetric rotor new energy vehicle motor based on magnetic axis double offset Download PDFInfo
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- CN118157347A CN118157347A CN202410343608.8A CN202410343608A CN118157347A CN 118157347 A CN118157347 A CN 118157347A CN 202410343608 A CN202410343608 A CN 202410343608A CN 118157347 A CN118157347 A CN 118157347A
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- 230000004888 barrier function Effects 0.000 claims abstract description 42
- 238000004804 winding Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 12
- 230000004907 flux Effects 0.000 description 9
- 239000002131 composite material Substances 0.000 description 5
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/06—Magnetic cores, or permanent magnets characterised by their skew
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
An asymmetric rotor new energy vehicle motor based on magnetic axis double offset belongs to the field of new energy vehicle motors. The problem of have motor torque density low in current new forms of energy automobile-used motor is solved. According to the motor, M groups of axially asymmetric double-V-shaped magnetic barrier through holes are formed in the circumferential direction of a rotor core at equal intervals, each group of asymmetric double-V-shaped air magnetic barrier through holes comprises two asymmetric V-shaped through holes, the two asymmetric V-shaped through holes are stacked and distributed along the radial direction of the rotor core, and the opening directions of the two asymmetric V-shaped through holes face the outer side of the rotor core; the lengths of the two strip-shaped holes of each asymmetric V-shaped through hole are different, a permanent magnet is arranged in each strip-shaped hole, the permanent magnet in the shorter strip-shaped hole in each asymmetric V-shaped through hole is longer, the permanent magnet in the longer strip-shaped hole is shorter, and each permanent magnet penetrates through the corresponding strip-shaped hole. The invention is suitable for improving the torque density of the motor.
Description
Technical Field
The invention belongs to the field of motors for new energy vehicles.
Background
In both conventional round wire and flat wire motors, the permanent magnet cost is a major part of the motor cost. The rare earth permanent magnet material is taken as a non-renewable resource, and the price of the rare earth permanent magnet material is continuously increased along with continuous exploitation, so that the production cost of the motor is continuously increased. In order to meet the practical significance and meet the demand of sustainable development of the driving motor of the new energy automobile, in order to solve the contradiction between high performance and high cost, higher utilization of magnetic resistance and electromagnetic torque is needed, and the torque density of the motor is improved.
At present, the traditional symmetrical built-in permanent magnet synchronous motors of single V type, double V type, straight line type and V+1 type have the following two disadvantages, on one hand, the magnetic resistance torque is fixed due to the symmetry of the motor structure, and the function of the magnetic resistance torque is not fully exerted; on the other hand, the permanent magnet flux linkage cannot change due to the fixed permanent magnet dosage, so that the permanent magnet torque is also fixed. Both of these factors result in a lower torque density of the motor.
Disclosure of Invention
The invention aims to solve the problem of low motor torque density in the existing new energy vehicle motor, and provides an asymmetric rotor new energy vehicle motor based on magnetic axis double offset.
The invention relates to a motor for an asymmetric rotor new energy vehicle based on magnetic axis double offset, which comprises the following components: the stator iron core, the rotor iron core and the rotating shaft are sequentially and coaxially connected from outside to inside; n stator teeth are arranged on the end face of the stator core at equal intervals, and 8 layers of hairpin windings are arranged in stator slots between every two adjacent stator teeth; wherein n is a positive integer;
m groups of asymmetric double-V-shaped magnetic barrier through holes along the axial direction are arranged at equal intervals along the circumferential direction of the rotor core, wherein M is a positive integer;
Each group of asymmetric double-V-shaped air magnetic barrier through holes comprises two asymmetric V-shaped through holes, the two asymmetric V-shaped through holes are stacked and distributed along the radial direction of the rotor core, and the opening directions of the two asymmetric V-shaped through holes face the outer side of the rotor core; the lengths of the two strip-shaped holes of each asymmetric V-shaped through hole are different, a permanent magnet is arranged in each strip-shaped hole, the permanent magnet in the shorter strip-shaped hole in each asymmetric V-shaped through hole is longer, the permanent magnet in the longer strip-shaped hole is shorter, and a gap is reserved between each permanent magnet and the two ends of the corresponding strip-shaped hole; and each permanent magnet penetrates through the corresponding strip-shaped hole.
Further, in the present invention, the two bar-shaped holes of each asymmetric V-shaped through hole are not communicated.
Further, in the present invention, the widths of the two bar-shaped holes of each asymmetric V-shaped through hole are the same.
Further, in the invention, longer strip-shaped holes in the two asymmetric V-shaped through holes are correspondingly stacked, shorter strip-shaped holes are correspondingly stacked, and the length of the strip-shaped hole positioned at the inner side is larger than that of the strip-shaped hole positioned at the outer side in the two strip-shaped holes positioned at one side.
Further, in the invention, the permanent magnet I and the permanent magnet III are respectively arranged in two shorter strip-shaped holes stacked on one side; the centers of the permanent magnet I and the permanent magnet III are coincided with the center of the magnetic barrier hole;
the two longer strip-shaped holes are respectively provided with a second permanent magnet and a fourth permanent magnet; the distance from the centers of the second permanent magnet and the fourth permanent magnet to the outer end of the strip-shaped hole where the centers are located is larger than the distance from the centers to the inner end.
Further, in the invention, the length of the longer strip-shaped hole of the asymmetric V-shaped through hole positioned at the outer side is 14.5mm, the width is 3.1mm, the length of the fourth internal permanent magnet is 4mm, the width is 3mm, the length of the shorter strip-shaped hole is 13mm, the width is 3.1mm, and the length of the third internal permanent magnet is 10mm and the width is 3mm.
Further, in the invention, the length of the longer strip-shaped hole of the asymmetric V-shaped through hole positioned at the inner side is 27mm, the width is 4.1mm, the length of the second internal permanent magnet is 8mm, and the width is 4mm; the shorter strip-shaped hole is 24mm long and 4.1mm wide, and the first permanent magnet inside the hole is 20mm long and 4mm wide.
The invention relates to an asymmetric rotor new energy vehicle motor based on magnetic axis double offset, wherein the composite torque of a known motor is formed by adding electromagnetic torque and reluctance torque. The second time of increasing the synthesized torque is to increase the electromagnetic torque, and the permanent magnet flux linkage is kept constant because the permanent magnet dosage is kept unchanged, so that the electromagnetic torque cannot change, and the electromagnetic torque shaft is offset only through the asymmetric design of the permanent magnet, so that the electromagnetic torque is increased under the set current angle. Through the two-step operation, the defect that the electromagnetic torque and the reluctance torque of the traditional symmetrical motor cannot be fully utilized can be overcome, and therefore the torque output capacity of the motor is improved.
Drawings
Fig. 1 is a schematic structural diagram of an asymmetric rotor new energy vehicle motor based on magnetic axis double offset.
FIG. 2 is a schematic diagram of a single pole asymmetric double V-shaped magnetic barrier hole and permanent magnet structure;
FIG. 3 is a drawing illustrating the structural dimensions of a single pole asymmetric double V-shaped magnetic barrier hole and a permanent magnet;
fig. 4 is a schematic structural diagram of a new energy vehicle motor with a symmetrical rotor in the prior art;
FIG. 5 is a schematic diagram of a prior art single pole symmetrical double V-shaped magnetic barrier hole and permanent magnet structure;
FIG. 6 is a schematic diagram of a structure of a flux barrier hole-only asymmetric motor;
FIG. 7 is a schematic diagram of a double V-shaped magnetic barrier hole and permanent magnet structure of an asymmetric motor with only the magnetic barrier hole under a single pole;
FIG. 8 is a diagram showing the comparison of motor reluctance torque when the original symmetric model is asymmetric with the magnetic barrier hole alone;
FIG. 9 is a schematic diagram showing the motor electromagnetic torque contrast for the case of only asymmetry of the barrier holes and asymmetry of the permanent magnets;
FIG. 10 is a schematic diagram of the d, q-axis inductances of the original symmetry model;
FIG. 11 is a schematic diagram of d-axis and q-axis inductances when only the barrier holes are asymmetric;
FIG. 12 is a schematic diagram of flux linkage of an asymmetric permanent magnet with only flux barriers;
FIG. 13 is a schematic diagram of the flux linkage of a permanent magnet when the flux barriers are asymmetric and the permanent magnet is asymmetric;
FIG. 14 is a graph showing the comparison of the output torque of the motor for the asymmetric rotor new energy vehicle based on the magnetic axis double offset and the output torque of the existing motor;
Fig. 15 is a rotor stress cloud chart of the asymmetric rotor new energy vehicle motor based on magnetic axis double offset at the highest rotation speed of 1.2 times.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The first embodiment is as follows: referring to fig. 1 to 15, a motor for an asymmetric rotor new energy vehicle according to the present embodiment based on a double offset of magnetic axes includes: the stator iron core 1, the rotor iron core 3 and the rotating shaft 5 are sequentially and coaxially connected from outside to inside; n stator teeth 6 are arranged on the end face of the stator core 1 at equal intervals, and 8 layers of hairpin windings 2 are arranged in stator slots between every two adjacent stator teeth 6; wherein n is a positive integer;
M groups of axially asymmetric double-V-shaped magnetic barrier through holes (4) are arranged at equal intervals along the circumferential direction of the rotor core 3, wherein M is a positive integer; each group of asymmetric double-V-shaped air magnetic barrier through holes 4 comprises two asymmetric V-shaped through holes which are stacked along the radial direction of the rotor core 3, and the opening directions of the two asymmetric V-shaped through holes face the outer side of the rotor core 3; the lengths of the two strip-shaped holes of each asymmetric V-shaped through hole are different, a permanent magnet is arranged in each strip-shaped hole, the permanent magnet in the shorter strip-shaped hole in each asymmetric V-shaped through hole is longer, the permanent magnet in the longer strip-shaped hole is shorter, and a gap is reserved between each permanent magnet and the two ends of the corresponding strip-shaped hole; and each permanent magnet penetrates through the corresponding strip-shaped hole.
Further, in the present embodiment, the two bar-shaped holes of each asymmetric V-shaped through hole are not communicated.
Further, in the present embodiment, the widths of the two bar-shaped holes of each asymmetric V-shaped through hole are the same.
Further, in this embodiment, the longer strip-shaped holes in the two asymmetric V-shaped through holes are stacked correspondingly, the shorter strip-shaped holes are stacked correspondingly, and stacked in the two strip-shaped holes on one side, and the length of the strip-shaped hole on the inner side is greater than that of the strip-shaped hole on the outer side.
Further, in the present embodiment, two shorter bar-shaped holes stacked on one side are respectively provided with a permanent magnet one 41 and a permanent magnet three 43; the center of the first permanent magnet 41 and the center of the third permanent magnet 43 are coincident with the center of the magnetic barrier hole;
The two longer strip-shaped holes are respectively provided with a second permanent magnet 42 and a fourth permanent magnet 44; the distance from the center of the second permanent magnet 42 to the outer end of the strip-shaped hole where the center of the fourth permanent magnet 44 is located is larger than the distance from the center of the second permanent magnet to the inner end.
In this embodiment, the centers of the second permanent magnet 42 and the fourth permanent magnet 44 correspond to the center of the third permanent magnet 43 of the first permanent magnet 41, and therefore, the centers of the second permanent magnet 42 and the fourth permanent magnet 44 correspond to the center of the magnetic barrier hole on the shorter side, and do not coincide with the center of the magnetic barrier hole on the longer side.
Further, in the present embodiment, the length of the longer strip-shaped hole of the asymmetric V-shaped through hole located at the outside is 14.5mm, the width is 3.1mm, the length of the inner permanent magnet four 44 is 4mm, the width is 3mm, the length of the shorter strip-shaped hole is 13mm, the width is 3.1mm, the length of the inner permanent magnet three 43 is 10mm, and the width is 3mm.
Further, in the present embodiment, the length of the longer bar-shaped hole of the asymmetric V-shaped through hole located inside is 27mm, the width is 4.1mm, the length of the inner permanent magnet two 42 is 8mm, and the width is 4mm; the shorter strip-shaped hole is 24mm long and 4.1mm wide, and the first permanent magnet 41 inside is 20mm long and 4mm wide.
In this embodiment, referring to fig. 1 to 15, the motor for an asymmetric rotor new energy vehicle based on magnetic axis double offset in this embodiment includes, in sequence, a stator core in fig. 1, a rotor core and a coaxial nested rotating shaft, where the stator core is provided with 48 stator teeth, and the hairpin winding has a higher slot filling rate than a traditional round wire winding, and the flat wire motor can take a relatively smaller slot size, so that the cogging torque can be effectively reduced, and therefore, 8 layers of hairpin windings are placed inside each stator tooth, and three-phase alternating current is introduced into the windings to generate an armature magnetic field.
The rotor core is provided with 4 air magnetic barrier holes under each pole, the air magnetic barrier holes are axial through holes with a double V-shaped structure in radial section, in fig. 2, from the inner circle of the rotor to the outer circle of the rotor, two strip-shaped holes are longer through the asymmetric double V-shaped air magnetic barrier through holes 4, and then two strip-shaped holes are shorter through from outside to inside, the magnet adopts rare earth permanent magnets, and a magnetic steel groove is formed at the corner of each permanent magnet, so that the permanent magnets are convenient to place.
The air magnetic barrier holes under each pole are of non-axisymmetric structures, and the distances between the four ends of the opening end of the double-V-shaped structure and the outer circle of the rotor are different due to the asymmetry of the air magnetic barrier holes. The rare earth permanent magnets embedded in the air magnetic barrier holes under each pole are also of asymmetric structures, and the design purpose is to increase electromagnetic torque under a set angle by distributing and moving electromagnetic torque shafts through the asymmetric permanent magnets.
The magnetizing directions of the permanent magnets 41, 42, 43 and 44 are respectively perpendicular to the length direction of the corresponding strip-shaped holes, the sum of the magnetizing included angles of the permanent magnets 41 and 42 and the included angles between the two strip-shaped holes of the V-shaped holes positioned on the inner side is kept at 180 degrees, the sum of the magnetizing included angles of the permanent magnets 43 and 44 and the included angles between the two strip-shaped holes of the V-shaped holes positioned on the outer side is kept at 180 degrees, the traditional symmetrical structure is shown in fig. 4 and 5, and the permanent magnet torque and the reluctance torque are not fully utilized. Fig. 6 and 7 are only the asymmetry models of the magnetic barrier holes, and are first lifting torque models by using reluctance torque, the d-axis inductance value and the q-axis inductance value of the model and the original symmetry model are shown in fig. 10 and 11, and the change of the reluctance torque and the magnetic axis offset are shown in fig. 8. Fig. 1 and 2 are the asymmetric magnetic barrier hole and the asymmetric permanent magnet model of the invention, and the second lifting torque model is realized by utilizing electromagnetic torque, the flux linkage between the model and the permanent magnet of the asymmetric magnetic barrier hole model is shown in fig. 12 and 13, and the change of the electromagnetic torque and the magnetic axis deviation are shown in fig. 9.
The original model is a regular bilateral symmetry model (fig. 4 and 5), the average torque of the original model (fig. 14) is 150.35Nm, the reluctance shaft is offset by the elongation magnetic barrier (fig. 6 and 7) to increase the composite torque by the first step optimization, the relationship between the elongation lengths of the right outer magnetic barrier and the inner magnetic barrier and the composite torque is shown in table 1, as can be seen from table 1, the torque increase is slow after the group D, the optimal elongation length interval is in the (D-F) interval, but the rotor stress of the structure of the group E, F exceeds the yield strength of 410Mpa of the material, the group D is the optimal choice, and the average torque of the group D model (fig. 14) is 158.79Nm. The second optimization was performed on the basis of group D, and the resultant torque was increased a second time by changing the amount of the left and right parts of the permanent magnet (fig. 1 and 2) to shift the electromagnetic axis, and the permanent magnet was 20mm at maximum (as shown in table 2) due to the limitation of the magnetic barrier length, so that the optimal structure was d+f combination, and the average torque of the d+f group model (fig. 14) was 166.64Nm. As can be seen from the simulation of the rotor dynamics by the Workbench software in ANSYS, when the maximum rotating speed is 1.2 times of the maximum rotating speed (14400 rpm) at normal temperature, the maximum stress of the rotor is 400.52Mpa (figure 15), which is less than the maximum yield strength of 410Mpa of the silicon steel sheet, the rotor cannot break, and the structure meets the stress requirement.
TABLE 1 relationship between length of elongation of outer and inner magnetic barriers and resultant torque
TABLE 2 relationship between reduced length of outside permanent magnet and inside permanent magnet and resultant torque
According to the asymmetric rotor new energy vehicle motor based on magnetic axis double offset, as the composite torque of the motor is formed by adding electromagnetic torque and reluctance torque, the composite torque is increased by utilizing reluctance torque for the first time, an original symmetric model is subjected to asymmetric design of magnetic barrier holes, and the purpose is to enable the elongated magnetic barrier holes to block more magnetic force lines than the original symmetric magnetic barrier holes, so that d-axis inductance difference and q-axis inductance difference are increased (fig. 10 and 11), reluctance torque can be increased, and meanwhile, reluctance magnetic axis offset is caused by the asymmetry of the magnetic barrier, so that the reluctance torque is increased again under a set current angle (fig. 8). The second time of increasing the resultant torque is to increase the resultant torque by using electromagnetic torque, and the permanent magnet flux linkage is kept constant (fig. 12 and 13) because the permanent magnet dosage is kept unchanged, so that the electromagnetic torque is not changed in size, and the electromagnetic torque shaft is offset (fig. 9) only by the design of asymmetric permanent magnets, so that the electromagnetic torque is increased at a set angle. Through the two steps of operation, the torque output capacity of the motor can be improved, the current provided by the motor when the motor reaches the same torque level becomes smaller, the current density is reduced, the copper consumption of the winding is further reduced, and the motor efficiency is improved.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (7)
1. Asymmetric rotor new forms of energy automobile-used motor based on magnetic axis double offset, its characterized in that includes: the stator iron core (1), the rotor iron core (3) and the rotating shaft (5) are sequentially and coaxially connected from outside to inside; n stator teeth (6) are arranged on the end face of the stator core (1) at equal intervals, and 8 layers of hairpin windings (2) are arranged in stator slots between every two adjacent stator teeth (6); wherein n is a positive integer;
m groups of axially asymmetric double-V-shaped magnetic barrier through holes (4) are arranged at equal intervals along the circumferential direction of the rotor core (3), wherein M is a positive integer; each group of asymmetric double-V-shaped air magnetic barrier through holes (4) comprises two asymmetric V-shaped through holes which are stacked along the radial direction of the rotor core (3), and the opening directions of the two asymmetric V-shaped through holes face the outer side of the rotor core (3); the lengths of the two strip-shaped holes of each asymmetric V-shaped through hole are different, a permanent magnet is arranged in each strip-shaped hole, the permanent magnet in the shorter strip-shaped hole in each asymmetric V-shaped through hole is longer, the permanent magnet in the longer strip-shaped hole is shorter, and a gap is reserved between each permanent magnet and the two ends of the corresponding strip-shaped hole; and each permanent magnet penetrates through the corresponding strip-shaped hole.
2. The magnetic axis double offset based asymmetric rotor new energy vehicle motor of claim 1, wherein the two bar-shaped holes of each asymmetric V-shaped through hole are not communicated.
3. The magnetic axis double offset based asymmetric rotor new energy vehicle motor of claim 1, wherein the widths of the two bar-shaped holes of each asymmetric V-shaped through hole are the same.
4. The magnetic axis double offset-based asymmetric rotor new energy vehicle motor according to claim 1 or 2, wherein longer strip-shaped holes in the two asymmetric V-shaped through holes are stacked correspondingly, shorter strip-shaped holes are stacked correspondingly, and stacked in two strip-shaped holes on one side, and the length of the strip-shaped hole on the inner side is longer than that of the strip-shaped hole on the outer side.
5. The magnetic-axis double-offset-based asymmetric-rotor new-energy vehicle motor according to claim 3, wherein a permanent magnet one (41) and a permanent magnet three (43) are respectively arranged in two shorter strip-shaped holes stacked on one side; the center of the permanent magnet I (41) and the center of the permanent magnet III (43) are overlapped with the center of the magnetic barrier hole; two longer strip-shaped holes are respectively provided with a second permanent magnet (42) and a fourth permanent magnet (44); the distance from the centers of the second permanent magnet (42) and the fourth permanent magnet (44) to the outer end of the strip-shaped hole is larger than the distance from the centers to the inner end.
6. The magnetic axis double offset based asymmetric rotor new energy vehicle motor according to claim 3, wherein the length of the long bar hole of the asymmetric V-shaped through hole positioned at the outer side is 14.5mm, the width is 3.1mm, the length of the inner permanent magnet four (44) is 4mm, the width is 3mm, the length of the short bar hole is 13mm, the width is 3.1mm, the length of the inner permanent magnet three (43) is 10mm, and the width is 3mm.
7. The magnetic axis double offset based asymmetric rotor new energy vehicle motor according to claim 5, wherein the length of the longer strip-shaped hole of the asymmetric V-shaped through hole positioned at the inner side is 27mm, the width is 4.1mm, the length of the inner permanent magnet II (42) is 8mm, and the width is 4mm; the shorter strip-shaped hole is 24mm long and 4.1mm wide, and the inner permanent magnet one (41) is 20mm long and 4mm wide.
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| CN202410343608.8A CN118157347A (en) | 2024-03-25 | 2024-03-25 | Asymmetric rotor new energy vehicle motor based on magnetic axis double offset |
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| CN202410343608.8A CN118157347A (en) | 2024-03-25 | 2024-03-25 | Asymmetric rotor new energy vehicle motor based on magnetic axis double offset |
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| CN116742852A (en) * | 2023-07-03 | 2023-09-12 | 山东理工大学 | Generator rotor for weakening air gap flux density distortion and voltage-stabilizing power generation system |
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2024
- 2024-03-25 CN CN202410343608.8A patent/CN118157347A/en active Pending
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|---|---|---|---|---|
| JP2008104353A (en) * | 2008-01-16 | 2008-05-01 | Mitsubishi Electric Corp | Permanent magnet type motor |
| CN114400803A (en) * | 2022-02-23 | 2022-04-26 | 河南通宇新源动力有限公司 | Permanent magnet motor rotor punching sheet structure with staggered magnetic poles |
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