CN116742853A - Concentrated magnetic type combined magnetic pole hybrid excitation driving motor for new energy automobile - Google Patents
Concentrated magnetic type combined magnetic pole hybrid excitation driving motor for new energy automobile Download PDFInfo
- Publication number
- CN116742853A CN116742853A CN202310740030.5A CN202310740030A CN116742853A CN 116742853 A CN116742853 A CN 116742853A CN 202310740030 A CN202310740030 A CN 202310740030A CN 116742853 A CN116742853 A CN 116742853A
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- permanent magnet
- magnet steel
- magnetic pole
- asymmetric
- rectangular
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- 230000005284 excitation Effects 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 125
- 239000010959 steel Substances 0.000 claims abstract description 125
- 230000005389 magnetism Effects 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 8
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 210000000078 claw Anatomy 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000005347 demagnetization Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000003313 weakening effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 2
- 238000004080 punching 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
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 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
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provides a concentrated magnetic type combined magnetic pole hybrid excitation driving motor for a new energy automobile, and belongs to the technical field of automobile motor appliances. The permanent magnet rotor core excircle equipartition has 4 first rectangle permanent magnet steel, be equipped with the first convex permanent magnet steel that is greater than first rectangle permanent magnet steel length between two adjacent first rectangle permanent magnet steel, be equipped with asymmetric V-arrangement magnetic pole in the middle of the inner of adjacent first rectangle permanent magnet steel and first convex permanent magnet steel, the outside of asymmetric V-arrangement magnetic pole is equipped with positive splayed magnetic pole, this motor structure adopts asymmetric V-arrangement to make up the permanent magnet steel of different shapes, strengthen the air gap density sine nature, improve the output of motor, set up magnetic bypass and magnetism isolation groove simultaneously, weaken the effect of impact current, be favorable to weakening motor armature reaction, strengthen the anti demagnetization ability of motor.
Description
Technical Field
The invention provides a concentrated magnetic type combined magnetic pole hybrid excitation driving motor for a new energy automobile, and belongs to the technical field of automobile motor appliances.
Background
At present, methods for improving the air gap magnetic density and reducing the magnetic density distortion rate of the motor have been proposed, such as the prior art, the Chinese patent announced: high-efficiency energy-saving rare earth permanent magnet generator with application number: 201921299302.8A generator rotor structure combining radial magnetic steel and tangential magnetic steel is disclosed, tangential permanent magnetic steel is arranged in a magnetic yoke along the diameter direction of the rotor, radial permanent magnetic steel is arranged between two adjacent tangential permanent magnetic steel according to a straight shape, and rare earth permanent magnetic steel as much as possible improves the air gap density, or the volume of the rotor is reduced, the consumption of the permanent magnetic steel is reduced, the cost is reduced, and the generator adaptability and application occasions are improved under the condition that the air gap density is fixed. Application number: 201310467230.4A magnetic pole punching sheet and a permanent magnet generator rotor core adopting the magnetic pole punching sheet, discloses a rotor structure with staggered and offset magnetic pole symmetry axes of adjacent core sections, which axially segments the permanent magnet generator rotor core and improves the harmonic magnetic field of teeth of a permanent magnet motor. The mode that the rotor excircle was seted up the recess has increased the complexity of technology, and mechanical strength is also not high, and the air gap leads to the increase of motor total magnetic resistance, reduces motor efficiency. The rotor axial sections are staggered, so that the processing procedure is increased, the operation is inconvenient, and the working efficiency of unit time is reduced.
Disclosure of Invention
The invention aims to solve the technical problems that: on the premise of ensuring that the processing procedure, the process difficulty and the motor cost are not increased and are not greatly changed, the defects of the prior art are overcome, and the concentrated magnetic combined magnetic pole hybrid excitation driving motor for the new energy automobile is provided.
The invention adopts the technical proposal for solving the technical problems that: the utility model provides a new energy automobile is with gathering magnetic combination magnetic pole hybrid excitation driving motor, includes pivot, front end housing, rear end housing, rotor core, casing, first rectangle permanent magnet steel, first convex permanent magnet steel, asymmetric V-arrangement magnetic pole, positive splayed magnetic pole, second convex permanent magnet steel, second rectangle permanent magnet steel, first rectangle magnetism isolation groove, second rectangle magnetism isolation groove, its characterized in that:
4 first rectangular permanent magnet steels are uniformly distributed on the outer circle of the rotor core, the first rectangular permanent magnet steels extend towards the outer circle of the rotor core along the diameter of the rotor core, and a non-communication distance of 1.5mm is reserved between the outer ends of the first rectangular permanent magnet steels and the outer circle of the rotor core;
a first arc-shaped permanent magnet steel with the length larger than that of the first rectangular permanent magnet steel is arranged between two adjacent first rectangular permanent magnet steel, the arc concave surface of the first arc-shaped permanent magnet steel faces to the first rectangular permanent magnet steel on the left side, and a non-communication distance of 1.5mm is arranged between the outer end of the first arc-shaped permanent magnet steel and the outer circle of the rotor core;
an asymmetric V-shaped magnetic pole is arranged between the inner ends of the adjacent first rectangular permanent magnet steel and the first circular arc permanent magnet steel, one longer side of the asymmetric V-shaped magnetic pole is close to the first rectangular permanent magnet steel, the other longer side of the asymmetric V-shaped magnetic pole is provided with a second circular arc permanent magnet steel, one shorter side of the asymmetric V-shaped magnetic pole is close to the first circular arc permanent magnet steel, the other shorter side of the asymmetric V-shaped magnetic pole is used as a first rectangular magnetism isolating groove, the proximal ends of the asymmetric V-shaped magnetic poles are not communicated, and the asymmetric V-shaped magnetic pole is not communicated with the first rectangular permanent magnet steel and the first circular arc permanent magnet steel and has a non-communication distance of 1.5mm;
the outer side of the asymmetric V-shaped magnetic pole is provided with a positive splayed magnetic pole, the long side of the positive splayed magnetic pole is close to the short side of the asymmetric V-shaped magnetic pole, and a second rectangular permanent magnet steel is arranged on the long side of the positive splayed magnetic pole, and the long side of the positive splayed magnetic pole is communicated with the short side of the asymmetric V-shaped magnetic pole;
the short edge of the positive splayed magnetic pole is close to the long edge of the asymmetric V-shaped magnetic pole, and is used as a second rectangular magnetism isolating slot, and the short edge of the positive splayed magnetic pole is communicated with the long edge of the asymmetric V-shaped magnetic pole;
the arc length between the outer ends of the positive splayed magnetic poles, the arc length between the first rectangular permanent magnet steel and the outer ends of the adjacent positive splayed magnetic poles, and the arc length between the first circular arc permanent magnet steel and the outer ends of the adjacent positive splayed magnetic poles are all equal.
The first rectangular permanent magnet steel 7 and the first circular arc permanent magnet steel 8 are made of neodymium iron boron, and the second rectangular permanent magnet steel 10 and the second circular arc permanent magnet steel 9 are made of ferrite.
The polarities of the opposite faces of the adjacent first rectangular permanent magnet steel 7 and the first circular arc permanent magnet steel 8 are the same, and the polarities of the opposite faces of the adjacent first rectangular permanent magnet steel 7 and the first circular arc permanent magnet steel 8 are the same as the polarities of the outer side faces of the second circular arc permanent magnet steel 9 and the second rectangular permanent magnet steel 10 between the adjacent first rectangular permanent magnet steel 7 and the first circular arc permanent magnet steel 8.
Compared with the prior art, the invention has the following technical effects:
(1) Adopting asymmetric V-shaped magnetic poles to combine permanent magnet steels with different shapes, enhancing the air gap flux density and improving the output power of the motor;
(2) The magnetic bypass and the magnetic isolation groove are arranged, so that the impact current is weakened, the armature reaction of the motor is weakened, and the anti-demagnetizing capability of the motor is enhanced;
(3) The magnetic steel and the magnetism isolating grooves are alternately arranged, so that the sine of the air gap flux density is improved, and the efficiency of the motor is improved;
(4) The combined magnetic pole structure can weaken cogging torque and improve the running performance of the motor;
(5) The multi-combination magnetic pole structure can reduce the cogging torque, simultaneously maintain the mechanical strength of the rotor of the motor without any offset to a great extent, reduce the failure rate of the motor and prolong the service life of the motor.
Drawings
Fig. 1 is a schematic diagram of the motor structure of the present invention.
Fig. 2 is a schematic view of the rotor structure of the present invention.
In the figure: 1. the magnetic shielding device comprises a rotating shaft, 2, a front end cover, 3, a casing, 4, a stator, 5, a rear end cover, 6, a permanent magnet rotor core, 7, first rectangular permanent magnet steel, 8, first circular arc permanent magnet steel, 9, second circular arc permanent magnet steel, 10, second rectangular permanent magnet steel, 11, a first rectangular magnetism shielding groove, 12 and a second rectangular magnetism shielding groove.
Description of the embodiments
The invention is further described below with reference to the accompanying drawings.
The utility model provides a new energy automobile is with gathering magnetic combination magnetic pole hybrid excitation driving motor, includes pivot 1, front end housing 2, rear end housing 5, rotor core 6, casing 3, first rectangle permanent magnet steel 7, first convex permanent magnet steel 8, asymmetric V-arrangement magnetic pole, positive splayed magnetic pole, second convex permanent magnet steel 9, second rectangle permanent magnet steel 10, first rectangle magnetism isolating groove 11, second rectangle magnetism isolating groove 12, its characterized in that:
4 first rectangular permanent magnet steels 7 are uniformly distributed on the outer circle of the rotor core 6, the first rectangular permanent magnet steels 7 extend towards the outer circle of the rotor core 6 along the diameter of the rotor core 6, and a non-communication distance of 1.5mm is reserved between the outer end of the first rectangular permanent magnet steels 7 and the outer circle of the rotor core 6;
a first arc-shaped permanent magnet steel 8 with the length larger than that of the first rectangular permanent magnet steel 7 is arranged between two adjacent first rectangular permanent magnet steel 7, the arc concave surface of the first arc-shaped permanent magnet steel 8 faces the first rectangular permanent magnet steel 7 at the left side, and a non-communication distance of 1.5mm is reserved between the outer end of the first arc-shaped permanent magnet steel 8 and the outer circle of the rotor core 6;
an asymmetric V-shaped magnetic pole is arranged between the inner ends of the adjacent first rectangular permanent magnet steel 7 and the first circular arc-shaped permanent magnet steel 8, one longer side of the asymmetric V-shaped magnetic pole is close to the first rectangular permanent magnet steel 7, the other longer side of the asymmetric V-shaped magnetic pole is provided with a second circular arc-shaped permanent magnet steel 9, one shorter side of the asymmetric V-shaped magnetic pole is close to the first circular arc-shaped permanent magnet steel 8, one shorter side of the asymmetric V-shaped magnetic pole is used as a first rectangular magnetism isolating groove 11, the proximal ends of the asymmetric V-shaped magnetic poles are not communicated, and the asymmetric V-shaped magnetic poles are not communicated with the first rectangular permanent magnet steel 7 and the first circular arc-shaped permanent magnet steel 8 and have a non-communication distance of 1.5mm;
the outer side of the asymmetric V-shaped magnetic pole is provided with a positive splayed magnetic pole, the long side of the positive splayed magnetic pole is close to the short side of the asymmetric V-shaped magnetic pole, and a second rectangular permanent magnet steel 10 is arranged on the long side of the positive splayed magnetic pole, and the long side of the positive splayed magnetic pole is communicated with the short side of the asymmetric V-shaped magnetic pole;
the short edge of the positive splayed magnetic pole is close to the long edge of the asymmetric V-shaped magnetic pole and is used as a second rectangular magnetism isolating groove 12, and the short edge of the positive splayed magnetic pole is communicated with the long edge of the asymmetric V-shaped magnetic pole;
the arc length between the outer ends of the positive splayed magnetic poles, the arc length between the first rectangular permanent magnet steel 7 and the outer ends of the adjacent positive splayed magnetic poles, and the arc length between the first circular arc permanent magnet steel 8 and the outer ends of the adjacent positive splayed magnetic poles are all equal.
The first rectangular permanent magnet steel 7 and the first circular arc permanent magnet steel 8 are made of neodymium iron boron, and the second rectangular permanent magnet steel 10 and the second circular arc permanent magnet steel 9 are made of ferrite.
The polarities of the opposite faces of the adjacent first rectangular permanent magnet steel 7 and the first circular arc permanent magnet steel 8 are the same, and the polarities of the opposite faces of the adjacent first rectangular permanent magnet steel 7 and the first circular arc permanent magnet steel 8 are the same as the polarities of the outer side faces of the second circular arc permanent magnet steel 9 and the second rectangular permanent magnet steel 10 between the adjacent first rectangular permanent magnet steel 7 and the first circular arc permanent magnet steel 8.
Claims (3)
1. The utility model provides a new energy automobile is with gathering magnetic combination magnetic pole hybrid excitation driving motor, includes claw pole rotor, pivot (1), front end housing (2), rear end housing (5), permanent magnet rotor core (6), casing (3), first rectangle permanent magnet steel (7), first convex permanent magnet steel (8), asymmetric V-arrangement magnetic pole, positive splayed magnetic pole, second convex permanent magnet steel (9), second rectangle permanent magnet steel (10), first rectangle magnetism isolating slot (11), second rectangle magnetism isolating slot (12), its characterized in that:
4 first rectangular permanent magnet steels (7) are uniformly distributed on the outer circle of the permanent magnet rotor core (6), the first rectangular permanent magnet steels (7) extend towards the outer circle of the permanent magnet rotor core (6) along the diameter of the permanent magnet rotor core (6), and a non-communication distance of 1.5mm is reserved between the outer end of the first rectangular permanent magnet steels (7) and the outer circle of the permanent magnet rotor core (6);
a first arc-shaped permanent magnet steel (8) with the length larger than that of the first rectangular permanent magnet steel (7) is arranged between two adjacent first rectangular permanent magnet steel (7), the arc concave surface of the first arc-shaped permanent magnet steel (8) faces the first rectangular permanent magnet steel (7) at the left side, and a non-communication distance of 1.5mm is reserved between the outer end of the first arc-shaped permanent magnet steel (8) and the outer circle of the permanent magnet rotor core (6);
an asymmetric V-shaped magnetic pole is arranged between the inner ends of the adjacent first rectangular permanent magnet steel (7) and the first circular arc-shaped permanent magnet steel (8), one longer side of the asymmetric V-shaped magnetic pole is close to the first rectangular permanent magnet steel (7), the second circular arc-shaped permanent magnet steel (9) is arranged on the longer side of the asymmetric V-shaped magnetic pole, one shorter side of the asymmetric V-shaped magnetic pole is close to the first circular arc-shaped permanent magnet steel (8), the shorter side of the asymmetric V-shaped magnetic pole is used as a first rectangular magnetism isolating groove (11), the near ends of the asymmetric V-shaped magnetic poles are not communicated, and the asymmetric V-shaped magnetic poles are not communicated with the first rectangular permanent magnet steel (7) and the first circular arc-shaped permanent magnet steel (8) and are not communicated with each other by a distance of 1.5mm;
the outer side of the asymmetric V-shaped magnetic pole is provided with a positive splayed magnetic pole, the long side of the positive splayed magnetic pole is close to the short side of the asymmetric V-shaped magnetic pole, and a second rectangular permanent magnet steel (10) is arranged on the long side of the positive splayed magnetic pole, and the long side of the positive splayed magnetic pole is communicated with the short side of the asymmetric V-shaped magnetic pole;
the short edge of the positive splayed magnetic pole is close to the long edge of the asymmetric V-shaped magnetic pole, and is used as a second rectangular magnetism isolating groove (12), and the short edge of the positive splayed magnetic pole is communicated with the long edge of the asymmetric V-shaped magnetic pole;
the arc length between the outer ends of the positive splayed magnetic poles, the arc length between the first rectangular permanent magnet steel (7) and the outer ends of the adjacent positive splayed magnetic poles, and the arc length between the first circular arc permanent magnet steel (8) and the outer ends of the adjacent positive splayed magnetic poles are all equal.
2. The concentrated-type combined-pole hybrid excitation driving motor for a new energy automobile according to claim 1, wherein: the first rectangular permanent magnet steel (7) and the first circular arc permanent magnet steel (8) are made of neodymium iron boron, and the second rectangular permanent magnet steel (10) and the second circular arc permanent magnet steel (9) are made of ferrite.
3. The concentrated-type combined-pole hybrid excitation driving motor for a new energy automobile according to claim 1, wherein: the polarities of the opposite faces of the adjacent first rectangular permanent magnet steel (7) and the first circular arc permanent magnet steel (8) are the same, and the polarities of the opposite faces of the adjacent first rectangular permanent magnet steel (7) and the first circular arc permanent magnet steel (8) are the same as the polarities of the outer side faces of the adjacent second circular arc permanent magnet steel (9) and the second rectangular permanent magnet steel (10) between the adjacent first rectangular permanent magnet steel (7) and the adjacent first circular arc permanent magnet steel (8).
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CN202310740030.5A CN116742853B (en) | 2023-06-21 | 2023-06-21 | Concentrated magnetic type combined magnetic pole hybrid excitation driving motor for new energy automobile |
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CN202310740030.5A CN116742853B (en) | 2023-06-21 | 2023-06-21 | Concentrated magnetic type combined magnetic pole hybrid excitation driving motor for new energy automobile |
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CN116742853B CN116742853B (en) | 2024-01-26 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117175880A (en) * | 2023-11-02 | 2023-12-05 | 山东理工大学 | Permanent magnet driving motor for reducing torque pulsation for new energy automobile |
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CN109412294A (en) * | 2018-10-31 | 2019-03-01 | 山东理工大学 | A kind of permanent magnet synchronous motor of electric car Asymmetric V-type magnet steel |
CN212381004U (en) * | 2020-04-30 | 2021-01-19 | 潍坊市电机一厂有限公司 | Rare-earth permanent-magnet composite magnetic pole driving motor |
US20220037973A1 (en) * | 2019-04-23 | 2022-02-03 | Shandong University Of Technology | Driving motor with asymmetric magnetic pole type of permanent magnet and claw pole electric excitation for electric automobile |
CN114567099A (en) * | 2022-04-02 | 2022-05-31 | 山东理工大学 | Embedded combined permanent magnet and salient pole electromagnetic hybrid excitation driving motor for electric automobile |
CN116191804A (en) * | 2023-02-28 | 2023-05-30 | 山东理工大学 | Combined magnetic pole permanent magnet generator with asymmetric magnetic pole center structure |
CN116260305A (en) * | 2023-05-15 | 2023-06-13 | 湖南大学 | Modularized axial magnetic flux hybrid excitation motor based on Halbach magnetic focusing rotor |
-
2023
- 2023-06-21 CN CN202310740030.5A patent/CN116742853B/en active Active
Patent Citations (6)
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CN109412294A (en) * | 2018-10-31 | 2019-03-01 | 山东理工大学 | A kind of permanent magnet synchronous motor of electric car Asymmetric V-type magnet steel |
US20220037973A1 (en) * | 2019-04-23 | 2022-02-03 | Shandong University Of Technology | Driving motor with asymmetric magnetic pole type of permanent magnet and claw pole electric excitation for electric automobile |
CN212381004U (en) * | 2020-04-30 | 2021-01-19 | 潍坊市电机一厂有限公司 | Rare-earth permanent-magnet composite magnetic pole driving motor |
CN114567099A (en) * | 2022-04-02 | 2022-05-31 | 山东理工大学 | Embedded combined permanent magnet and salient pole electromagnetic hybrid excitation driving motor for electric automobile |
CN116191804A (en) * | 2023-02-28 | 2023-05-30 | 山东理工大学 | Combined magnetic pole permanent magnet generator with asymmetric magnetic pole center structure |
CN116260305A (en) * | 2023-05-15 | 2023-06-13 | 湖南大学 | Modularized axial magnetic flux hybrid excitation motor based on Halbach magnetic focusing rotor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117175880A (en) * | 2023-11-02 | 2023-12-05 | 山东理工大学 | Permanent magnet driving motor for reducing torque pulsation for new energy automobile |
CN117175880B (en) * | 2023-11-02 | 2024-03-19 | 山东理工大学 | Permanent magnet driving motor for reducing torque pulsation for new energy automobile |
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