CN109951040A - Interval magnetic pole combined type permanent magnet drive motor for electric vehicle - Google Patents

Interval magnetic pole combined type permanent magnet drive motor for electric vehicle Download PDF

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Publication number
CN109951040A
CN109951040A CN201910329643.3A CN201910329643A CN109951040A CN 109951040 A CN109951040 A CN 109951040A CN 201910329643 A CN201910329643 A CN 201910329643A CN 109951040 A CN109951040 A CN 109951040A
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CN
China
Prior art keywords
magnet
rotor core
magnets
group
piece
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Pending
Application number
CN201910329643.3A
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Chinese (zh)
Inventor
张学义
张羽丰
耿慧慧
尹红彬
李波
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Shandong University of Technology
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Shandong University of Technology
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Publication date
Application filed by Shandong University of Technology filed Critical Shandong University of Technology
Priority to CN201910329643.3A priority Critical patent/CN109951040A/en
Publication of CN109951040A publication Critical patent/CN109951040A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

Abstract

The present invention provides a kind of interval magnetic pole combined type permanent magnet drive motor for electric vehicle, belongs to motor in electric automobile technical field of electric appliances.It is made of drive end bearing bracket, rear end cap, casing, rotor, stator, rotor includes rotor core, group of magnets, magnet isolation tank, each group of magnets includes two piece of first magnet and one piece of second magnet, second magnet is placed in the middle lower end of two neighboring first magnet, the magnetic field and the first magnet and the second magnet that magnetic field in driving motor air gap is provided by magnet itself the magnetic field that is formed of aggregation that influences each other provide jointly, directly facing air gap, permanent magnetism utilization rate is high in the magnetic field of generation.

Description

Interval magnetic pole combined type permanent magnet drive motor for electric vehicle
Technical field
The present invention provides a kind of interval magnetic pole combined type permanent magnet drive motor for electric vehicle, belongs to motor in electric automobile electricity Device technical field.
Background technique
The rotor of the permanent magnet drive motor used on electric car at present mostly uses greatly uniform field structure, such as existing skill Art, patent name: hybrid permanent magnet and Electromagnetic heating excitation generator, the patent No.: ZL201210119304.0 discloses following skill Art scheme, p-m rotor include the first rectangle magnet steel, non-magnetic slot wedge, the second rectangle magnet steel, and the first rectangle magnet steel is placed on diameter Into rectangular channel, the second rectangle magnet steel is placed in the tangential rectangular channel between two neighboring radial rectangular channel inner end, the structure Second magnet steel of rotor is placed between two neighboring first magnet steel inner end, and to prevent magnet steel leakage field, the second magnet steel is perpendicular to straight Length on diameter direction is approximately equal to the distance between two neighboring first magnet steel inner end, causes permanent magnet to waste, material use Rate is low, and the second magnet steel is placed in inner end, and the ability for assembling magnetic field is weak, and back-emf harmonic wave is big, and driving motor overall efficiency is low, makes It is needed further improvement with performance.
Summary of the invention
Drawbacks described above can be overcome the object of the present invention is to provide a kind of, and the magnetic field in driving motor air gap is mentioned by magnet itself The magnetic field of confession and the first magnet and the second magnet influence each other aggregation formed magnetic field provide jointly, the direct face in the magnetic field of generation To air gap, the high magnetic pole combined type permanent magnet drive motor in interval for electric vehicle of stock utilization, technology contents are as follows:
Interval magnetic pole combined type permanent magnet drive motor for electric vehicle, by rotor, drive end bearing bracket, rear end cap, casing, stator, axis group At, it is characterised in that: rotor includes rotor core, group of magnets, magnet isolation tank;
It is evenly equipped with even number group of magnets on rotor core circumferencial direction, each group of magnets includes two piece of first magnet and one piece the Two magnet, each group of magnets is symmetrical about the diametrical direction of rotor core, the corresponding rotor core outer circle arc length of each group of magnets Greater than rotor core outer circle arc length corresponding between two neighboring group of magnets;
The distance between two piece of first magnet outer end is greater than the distance between two piece of first magnet inner end, the outside of the first magnet with It is not connected between rotor core outer circle, the first magnet cross section is in rectangle;
Second magnet is set at the inside of group of magnets, and the distance between the second magnetic blow out centre and rotor core center are less than first The distance between magnetic blow out centre and rotor core center, the distance between the second magnetic blow out centre and rotor core center are greater than first Magnet is close to the distance between the bottom center of shaft side and rotor core center, and the second magnet is on perpendicular to diametrical direction Length be less than two neighboring first magnet inner end between length, the second magnet cross section be in rectangle;
Magnet isolation tank is set between the second magnet and adjacent first magnet inner end, and magnet isolation tank is connect with the second magnet, magnet isolation tank with The connection of first magnet, magnet isolation tank are in rectangle;
The second magnet in the rotor core perpendicular to the length in diametrical direction be two neighboring second magnet inner end it Between length half;
The polarity on the outside of two piece of first magnet in each group of magnets of the rotor core and the polarity phase on the outside of the second magnet Together, the polarity on the outside of the first magnet in two group of magnets of arbitrary neighborhood is identical;
The magnetizing direction thickness of second magnet is less than the magnetizing direction thickness of first magnet.
Working principle: when driving motor is passed through by three-phase inverter after the three-phase alternating current of pulsewidth modulation, driving motor Stator generates space rotating magnetic field, it and magnetic field interaction caused by rotor, rotor generate and stator winding rotating excitation field The consistent rotating torques in direction rotate driving motor rotor, and then drive electric car operation.
Compared with prior art, the present invention while the second magnet makes up every pole air gap waveform intermediate recess problem, it can Collect the first magnet segment magnetic field to increase operation rate, moreover it is possible to repel the first magnet segment magnetic field and preferably be dispersed in single magnetic Pole solves magnet waste, and reliability is low, problem at high cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention;
Fig. 2 is the p-m rotor sectional view of embodiment illustrated in fig. 1.
In figure: 1, axis 2, drive end bearing bracket 3, the first magnet 4, the second magnet 5, casing 6, stator 7, rotor iron Core 8, magnet isolation tank 9, rear end cap.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
Interval magnetic pole combined type permanent magnet drive motor for electric vehicle, by rotor, drive end bearing bracket 2, rear end cap 9, casing 5, stator 6, Axis 1 forms, it is characterised in that: rotor includes rotor core 7, group of magnets, magnet isolation tank 8;
Even number group of magnets is evenly equipped on rotor core circumferencial direction, each group of magnets includes two piece of first magnet 3 and one piece Second magnet 4, each group of magnets is symmetrical about the diametrical direction of rotor core 7, corresponding 7 outer circle of rotor core of each group of magnets Arc length is greater than corresponding 7 outer circle arc length of rotor core between two neighboring group of magnets;
The distance between two piece of first 3 outer end of magnet is greater than the distance between two piece of first 3 inner end of magnet, the first magnet 3 it is outer It is not connected between 7 outer circle of side and rotor core, 3 cross section of the first magnet is in rectangle;
Second magnet 4 is set at the inside of group of magnets, and the distance between 4 center of the second magnet and 7 center of rotor core are less than The distance between first magnet, 3 center and 7 center of rotor core, the distance between 4 center of the second magnet and 7 center of rotor core Greater than the first magnet 3 close to the distance between the bottom center of shaft side and 7 center of rotor core, the second magnet 4 is vertical It is less than the length between two neighboring first magnet, 3 inner end in the length in diametrical direction, 4 cross section of the second magnet is in rectangle;
Magnet isolation tank 8 is set between the second magnet 4 and adjacent first magnet, 3 inner end, and magnet isolation tank 8 is connect with the second magnet 4, every magnetic Slot 8 is connect with the first magnet 3, and magnet isolation tank 8 is in rectangle;
The second magnet 4 in the rotor core 7 is being two neighboring second magnet, 4 inner end perpendicular to the length in diametrical direction Between length half;
The polarity in 4 outside of polarity and the second magnet in two piece of first magnet, 3 outside in each group of magnets of the rotor core 7 Identical, the polarity in 3 outside of the first magnet in two group of magnets of arbitrary neighborhood is identical;
The magnetizing direction thickness of second magnet 4 is less than the magnetizing direction thickness of first magnet 3.

Claims (4)

1. a kind of interval magnetic pole combined type permanent magnet drive motor for electric vehicle by rotor, drive end bearing bracket, rear end cap, casing, is determined Son, axis composition, it is characterised in that: rotor includes rotor core, group of magnets, magnet isolation tank;
Be evenly equipped with even number group of magnets on the rotor core circumferencial direction, each group of magnets include two piece of first magnet and One piece of second magnet, each group of magnets is symmetrical about the diametrical direction of rotor core, outside the corresponding rotor core of each group of magnets Circular arc is long to be greater than corresponding rotor core outer circle arc length between two neighboring group of magnets;
The distance between described two piece of first magnet outer end is greater than the distance between described two piece of first magnet inner end, and described first It is not connected between the outside and rotor core outer circle of magnet, first magnet cross section is in rectangle;
Second magnet is set at the inside of the group of magnets, second magnetic blow out centre and the rotor core center it Between distance be less than the distance between first magnetic blow out centre and the rotor core center, second magnetic blow out centre and institute State bottom center and the rotor core of the distance between the rotor core center greater than first magnet close to shaft side The distance between center, second magnet perpendicular to the length in diametrical direction be less than two neighboring first magnet inner end it Between length, the second magnet cross section be in rectangle;
The magnet isolation tank is set between second magnet and the adjacent first magnet inner end, the magnet isolation tank and described the One magnet, second magnet are all connected with, and magnet isolation tank is in rectangle.
2. interval magnetic pole combined type permanent magnet drive motor for electric vehicle according to claim 1, it is characterised in that: described Second magnet is in the half perpendicular to the length between adjacent two piece of second magnet inner end of the length in diametrical direction.
3. interval magnetic pole combined type permanent magnet drive motor for electric vehicle according to claim 1, it is characterised in that: described The polarity on the outside of two piece of first magnet in each group of magnets of rotor core is identical with the polarity on the outside of the second magnet, any phase The polarity on the outside of the first magnet in adjacent two group of magnets is identical.
4. interval magnetic pole combined type permanent magnet drive motor for electric vehicle according to claim 1, it is characterised in that: described The magnetizing direction thickness of second magnet is less than the magnetizing direction thickness of first magnet.
CN201910329643.3A 2019-04-23 2019-04-23 Interval magnetic pole combined type permanent magnet drive motor for electric vehicle Pending CN109951040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910329643.3A CN109951040A (en) 2019-04-23 2019-04-23 Interval magnetic pole combined type permanent magnet drive motor for electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910329643.3A CN109951040A (en) 2019-04-23 2019-04-23 Interval magnetic pole combined type permanent magnet drive motor for electric vehicle

Publications (1)

Publication Number Publication Date
CN109951040A true CN109951040A (en) 2019-06-28

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Application Number Title Priority Date Filing Date
CN201910329643.3A Pending CN109951040A (en) 2019-04-23 2019-04-23 Interval magnetic pole combined type permanent magnet drive motor for electric vehicle

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CN (1) CN109951040A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020108789A1 (en) 2020-03-30 2021-09-30 Hiwin Mikrosystem Corp. Rotor structure of a permanent magnet motor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202183644U (en) * 2011-08-22 2012-04-04 高国华 Permanent magnet ring
CN102664502A (en) * 2012-04-21 2012-09-12 山东理工大学 Mixed permanent magnet and electromagnetism compound excitation generator
CN103762765A (en) * 2014-02-18 2014-04-30 山东理工大学 Tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor
CN105743312A (en) * 2016-05-13 2016-07-06 山东理工大学 Brushless electromagnetic and invisible magnetic pole composite excitation driving motor
CN105958779A (en) * 2016-05-11 2016-09-21 山东理工大学 Built-in double-radial permanent magnet steel drive motor for electric automobiles
EP3410574A1 (en) * 2017-06-02 2018-12-05 Hamilton Sundstrand Corporation Hybrid synchronous machines
CN208241424U (en) * 2018-05-08 2018-12-14 珠海格力电器股份有限公司 Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric car
CN109088494A (en) * 2018-08-14 2018-12-25 东南大学 A kind of built-in hybrid permanent magnet memory electrical machine of localized magnetic circuit parallel connection type

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202183644U (en) * 2011-08-22 2012-04-04 高国华 Permanent magnet ring
CN102664502A (en) * 2012-04-21 2012-09-12 山东理工大学 Mixed permanent magnet and electromagnetism compound excitation generator
CN103762765A (en) * 2014-02-18 2014-04-30 山东理工大学 Tangential and radial resultant magnetic field embedded permanent magnet rotor driving motor
CN105958779A (en) * 2016-05-11 2016-09-21 山东理工大学 Built-in double-radial permanent magnet steel drive motor for electric automobiles
CN105743312A (en) * 2016-05-13 2016-07-06 山东理工大学 Brushless electromagnetic and invisible magnetic pole composite excitation driving motor
EP3410574A1 (en) * 2017-06-02 2018-12-05 Hamilton Sundstrand Corporation Hybrid synchronous machines
CN208241424U (en) * 2018-05-08 2018-12-14 珠海格力电器股份有限公司 Rotor structure, permanent magnetism assist in synchronization reluctance motor and electric car
CN109088494A (en) * 2018-08-14 2018-12-25 东南大学 A kind of built-in hybrid permanent magnet memory electrical machine of localized magnetic circuit parallel connection type

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020108789A1 (en) 2020-03-30 2021-09-30 Hiwin Mikrosystem Corp. Rotor structure of a permanent magnet motor

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Application publication date: 20190628