WO2019214226A1 - 转子结构、永磁辅助同步磁阻电机及电动汽车 - Google Patents

转子结构、永磁辅助同步磁阻电机及电动汽车 Download PDF

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Publication number
WO2019214226A1
WO2019214226A1 PCT/CN2018/119825 CN2018119825W WO2019214226A1 WO 2019214226 A1 WO2019214226 A1 WO 2019214226A1 CN 2018119825 W CN2018119825 W CN 2018119825W WO 2019214226 A1 WO2019214226 A1 WO 2019214226A1
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WIPO (PCT)
Prior art keywords
permanent magnet
segment
slot
section
rotor
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PCT/CN2018/119825
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English (en)
French (fr)
Inventor
胡余生
陈彬
肖勇
卢素华
童童
Original Assignee
珠海格力电器股份有限公司
珠海格力节能环保制冷技术研究中心有限公司
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Publication of WO2019214226A1 publication Critical patent/WO2019214226A1/zh

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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
    • 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

Definitions

  • the present invention relates to the field of electrical equipment, and in particular to a rotor structure, a permanent magnet assisted synchronous reluctance motor, and an electric vehicle.
  • Electric vehicles have the characteristics of energy saving and environmental protection, and have been rapidly developed.
  • Existing electric vehicle drive motors In order to realize the high power density and high efficiency of the motor, more and more motors use high performance rare earth permanent magnet motors.
  • Rare earth permanent magnet motors can achieve high efficiency and high power density, mainly relying on high-performance rare earth permanent magnets.
  • the most widely used NdFeB rare earth permanent magnets The most widely used NdFeB rare earth permanent magnets.
  • rare earth is a non-renewable resource, the price is relatively expensive, and the fluctuation of rare earth price is also large, which leads to high production cost of electric vehicle driving motor, which is very unfavorable for promoting the comprehensive development of electric vehicle.
  • a ferrite permanent magnet auxiliary synchronous reluctance motor is also applied to an electric vehicle, but the motor has problems of high noise, easy demagnetization, and low efficiency.
  • the main object of the present invention is to provide a rotor structure, a permanent magnet assisted synchronous reluctance motor and an electric vehicle to solve the problem of low efficiency of the motor in the prior art.
  • a rotor structure comprising: a rotor body having a permanent magnet slot group disposed thereon, a plurality of permanent magnet slot groups, and a plurality of permanent magnet slot groups along the rotor
  • the body is circumferentially spaced apart
  • the plurality of permanent magnet slot sets include a first permanent magnet slot set
  • the first permanent magnet slot set includes a plurality of permanent magnet slots disposed in sequence outward in a radial direction of the rotor body
  • the plurality of permanent A portion of the slot portion of the at least one permanent magnet slot in the magnet slot is S-shaped in cross section in the radial direction of the rotor body.
  • the plurality of permanent magnet slots include a first inner permanent magnet slot
  • the first inner permanent magnet slot includes: a first slot segment, the first end of the first slot extends toward the shaft hole of the rotor body, the first slot a second end of the segment extending toward an outer edge of the rotor body and disposed at a distance from an outer edge of the rotor body; a second slot segment, the first end of the second slot segment being in communication with the first end of the first slot segment,
  • the second slot section extends along a direction perpendicular to the straight axis of the rotor body; the third slot section, the first end of the third slot section is in communication with the second end of the second slot section, and the second end of the third slot section faces the rotor
  • An outer edge of the body extends and is disposed at a distance from an outer edge of the rotor body, the first slot segment being disposed opposite the third slot segment; wherein the first slot segment and/or the third slot segment are along a radial direction of the rot
  • first inner layer permanent magnet grooves are plural, and the plurality of first inner layer permanent magnet grooves are spaced apart in the radial direction of the rotor body.
  • the plurality of permanent magnet slots further includes: an outer permanent magnet slot, the outer permanent magnet slot is spaced apart from the first inner permanent magnet slot and located outside the first inner permanent magnet slot.
  • the plurality of permanent magnet slot sets comprise a second permanent magnet slot set
  • the second permanent magnet slot set comprises a plurality of permanent magnet slots
  • the plurality of permanent magnet slots comprise a second inner permanent magnet slot
  • the slot includes: a fourth slot segment, the first end of the fourth slot segment extends toward the shaft hole of the rotor body, and the second end of the fourth slot segment extends toward the outer edge of the rotor body and is disposed at a distance from the outer edge of the rotor body
  • the fourth slot segment is disposed adjacent to the third slot segment;
  • the fifth slot segment the first slot of the fifth slot segment is in communication with the first end of the fourth slot segment, and the fifth slot segment is perpendicular to the straight axis of the rotor body a direction extending;
  • a sixth slot section the first end of the sixth slot section is in communication with the second end of the fifth slot section, and the second end of the sixth slot section extends toward the outer edge of the rotor body and outside the rotor
  • the cross section of the third slot section in the radial direction of the rotor body is S-shaped
  • the cross section of the fourth slot section in the radial direction of the rotor body is S-shaped
  • the third slot section and the fourth slot section are related to the rotor body.
  • the axis of intersection is symmetrically arranged.
  • the rotor structure further includes a connecting hole disposed at a position opposite to the recess of the third groove segment and the fourth groove segment.
  • permanent magnets are disposed in each of the permanent magnet slots, and a cross section of the permanent magnets in a radial direction of the rotor body is C-shaped.
  • the permanent magnet includes an inner layer permanent magnet
  • the inner layer permanent magnet includes: a first permanent magnet segment, the first permanent magnet segment is disposed in the second end of the first slot segment, and the first permanent magnet segment is along the diameter of the rotor body
  • the cross section of the direction is C-shaped;
  • the second permanent magnet segment is disposed in the first end of the first slot segment, and the cross section of the second permanent magnet segment in the radial direction of the rotor body is C-shaped
  • the bending direction of the first permanent magnet segment is opposite to the bending direction of the second permanent magnet segment.
  • the inner layer permanent magnet further includes: a third permanent magnet segment disposed in the second end of the third slot segment and disposed opposite to the first permanent magnet segment, the third permanent magnet segment being along the rotor
  • the cross section of the body in the radial direction is C-shaped; the fourth permanent magnet segment is disposed in the first end of the third slot segment and disposed opposite to the second permanent magnet segment, the fourth permanent magnet segment
  • the cross section in the radial direction of the rotor body is C-shaped, and the bending direction of the third permanent magnet segment is opposite to the bending direction of the fourth permanent magnet segment.
  • the structure of the first permanent magnet segment is the same as the structure of the second permanent magnet segment, and/or the structure of the third permanent magnet segment is the same as the structure of the fourth permanent magnet segment, and/or the structure of the first permanent magnet segment The structure is the same as that of the fourth permanent magnet segment.
  • the permanent magnet includes an inner layer permanent magnet
  • the inner layer permanent magnet includes: a first permanent magnet segment, the first permanent magnet segment is disposed in the second end of the first slot segment, and the first permanent magnet segment is along the diameter of the rotor body The cross section of the direction is C-shaped; the second permanent magnet segment is disposed in the second slot segment, and the first end of the second permanent magnet segment extends into the first end of the first slot segment, The second end of the second permanent magnet segment extends into the first end of the third slot segment, the second permanent magnet segment has a C-shaped cross section along the radial direction of the rotor body; the third permanent magnet segment, the third permanent magnet The segment is disposed in the second end of the third slot segment and disposed opposite the first permanent magnet segment, and the cross section of the third permanent magnet segment in the radial direction of the rotor body is C-shaped.
  • the protrusions of the first permanent magnet segment and the third permanent magnet segment are disposed toward a straight axis, and the structures of the first permanent magnet segment and the third permanent magnet segment are the same.
  • first permanent magnet segment, the second permanent magnet segment, and the third permanent magnet segment are symmetrically disposed about a straight axis.
  • the plurality of permanent magnet slots comprise outer layer permanent magnet slots
  • the permanent magnets comprise outer layer permanent magnets
  • the outer layer permanent magnets are disposed in the outer layer permanent magnet slots
  • the portion of the outer layer permanent magnets are along the radial direction of the rotor body
  • the cross section is C-shaped.
  • the cross section of the permanent magnet in the radial direction of the rotor body has a thickness in a middle portion of the C-shaped structure greater than a thickness of both ends of the C-shaped structure.
  • a permanent magnet assisted synchronous reluctance motor comprising a rotor structure which is the rotor structure described above.
  • an electric vehicle including a rotor structure, the rotor structure being the rotor structure described above.
  • the rotor structure of the solution effectively improves the magnetic flux generated by the permanent magnet of the rotor structure, increases the electromagnetic torque under the unit current of the motor having the rotor structure, and increases the efficiency of the motor. Moreover, the vibration and deviation of the permanent magnet caused by the centrifugal force, the vibration and the like during the rotation of the rotor can be effectively prevented, and the electromagnetic noise caused by the movement of the permanent magnet in the slot is effectively reduced.
  • Figure 1 is a schematic view showing the structure of a first embodiment of a rotor structure according to the present invention
  • Figure 2 is a schematic view showing the structure of a second embodiment of a rotor structure according to the present invention.
  • Figure 3 is a schematic view showing the structure of a third embodiment of a rotor structure according to the present invention.
  • Fig. 4 shows a schematic structural view of a fourth embodiment of a rotor structure according to the present invention.
  • spatially relative terms such as “above”, “above”, “on top”, “above”, etc., may be used herein to describe as in the drawings.
  • the exemplary term “above” can include both “over” and "under”.
  • the device can also be positioned in other different ways (rotated 90 degrees or at other orientations) and the corresponding description of the space used herein is interpreted accordingly.
  • a rotor structure is provided.
  • the rotor structure includes a rotor body 10.
  • the rotor body 10 is provided with a permanent magnet slot group, and the plurality of permanent magnet slot groups are disposed along the circumferential direction of the rotor body 10, and the plurality of permanent magnet slot groups include the first permanent magnet slot group.
  • the first permanent magnet slot group includes a plurality of permanent magnet slots arranged in the radial direction of the rotor body 10 in sequence, and a partial groove segment of at least one of the plurality of permanent magnet slots is transverse to the radial direction of the rotor body 10.
  • the cross section is S-shaped.
  • the rotor structure of the solution effectively improves the magnetic flux generated by the permanent magnet of the rotor structure, increases the electromagnetic torque of the motor with the rotor structure, and increases the efficiency of the motor. Moreover, the vibration and deviation of the permanent magnet caused by the centrifugal force, the vibration and the like during the rotation of the rotor can be effectively prevented, and the electromagnetic noise caused by the movement of the permanent magnet in the slot is effectively reduced.
  • the plurality of permanent magnet slots comprise a first inner permanent magnet slot.
  • the first inner permanent magnet slot includes a first slot segment 11, a second slot segment 12, and a third slot segment 13.
  • the first end of the first groove section 11 extends toward the shaft hole of the rotor body 10, and the second end of the first groove section 11 extends toward the outer edge of the rotor body 10 and is disposed at a distance from the outer edge of the rotor body 10.
  • the first end of the second slot section 12 is in communication with the first end of the first slot section 11.
  • the second groove section 12 extends in a direction perpendicular to the straight axis of the rotor body 10.
  • the first end of the third slot section 13 communicates with the second end of the second slot section 12, and the second end of the third slot section 13 extends toward the outer edge of the rotor body 10 and has a distance from the outer edge of the rotor body 10. It is provided that the first groove segment 11 is arranged opposite to the third groove segment 13. The cross section of the first groove segment 11 and/or the third groove segment 13 in the radial direction of the rotor body 10 is S-shaped. This arrangement can effectively improve the performance of the rotor structure.
  • the first inner layer permanent magnet grooves may be provided in plurality, and the plurality of first inner layer permanent magnet grooves may be spaced apart in the radial direction of the rotor body 10.
  • the plurality of permanent magnet slots further includes an outer permanent magnet slot 14.
  • the outer permanent magnet slots 14 are spaced apart from the first inner permanent magnet slots and are located outside of the first inner permanent magnet slots.
  • the plurality of permanent magnet slot sets comprise a second permanent magnet slot set.
  • the second permanent magnet slot set includes a plurality of permanent magnet slots, and the plurality of permanent magnet slots includes a second inner permanent magnet slot 20.
  • the second inner permanent magnet slot 20 includes a fourth slot segment 21, a fifth slot segment 22, and a sixth slot segment 23.
  • the first end of the fourth slot section 21 extends toward the axle bore of the rotor body 10, and the second end of the fourth slot section 21 extends toward the outer edge of the rotor body 10 and is disposed at a distance from the outer edge of the rotor body 10.
  • the fourth groove section 21 is disposed adjacent to the third groove section 13.
  • the first end of the fifth slot section 22 communicates with the first end of the fourth slot section 21, and the fifth slot section 22 extends along a direction perpendicular to the direction of the direct axis of the rotor body 10.
  • the first end of the sixth slot section 23 communicates with the second end of the fifth slot section 22, and the second end of the sixth slot section 23 extends toward the outer edge of the rotor body 10 and has a distance from the outer edge of the rotor body 10. It is provided that the fourth groove section 21 is disposed opposite to the sixth groove section 23; wherein the cross section of the fourth groove section 21 and/or the sixth groove section 23 in the radial direction of the rotor body 10 is S-shaped.
  • the cross section of the third slot section 13 in the radial direction of the rotor body 10 is S-shaped, and the cross section of the fourth slot section 21 in the radial direction of the rotor body 10 is S-shaped, the third slot section 13 and the fourth slot
  • the segments 21 are symmetrically disposed about the axis of intersection of the rotor body 10.
  • the rotor structure further includes a connection hole 40.
  • the connecting hole 40 is disposed at a position opposite to the concave portion of the third groove segment 13 and the fourth groove segment 21, wherein, as shown in FIG. 1, f1 is a concave portion, f2 is a convex portion, d is a straight axis, and q is a cross. axis.
  • permanent magnets 30 are disposed in each of the permanent magnet slots. At least a portion of the permanent magnet 30 in the radial direction of the rotor body 10 has a C-shaped cross section.
  • the permanent magnet 30 includes an inner layer permanent magnet.
  • the inner permanent magnet includes a first permanent magnet segment 31 and a second permanent magnet segment 32.
  • the first permanent magnet segment 31 is disposed in the second end of the first groove segment 11, and the cross section of the first permanent magnet segment 31 in the radial direction of the rotor body 10 is C-shaped.
  • the second permanent magnet segment 32 is disposed in the first end of the first slot segment 11, and the cross section of the second permanent magnet segment 32 in the radial direction of the rotor body 10 is C-shaped, and the bending direction of the first permanent magnet segment 31 is The second permanent magnet segments 32 are bent in opposite directions.
  • the inner permanent magnet further includes a third permanent magnet segment 33 and a fourth permanent magnet segment 34.
  • the third permanent magnet segment 33 is disposed in the second end of the third slot segment 13 and disposed opposite the first permanent magnet segment 31.
  • the third permanent magnet segment 33 has a C-shaped cross section along the radial direction of the rotor body 10.
  • the fourth permanent magnet segment 34 is disposed in the first end of the third slot segment 13 and disposed opposite the second permanent magnet segment 32.
  • the cross section of the fourth permanent magnet segment 34 in the radial direction of the rotor body 10 is C-shaped.
  • the bending direction of the third permanent magnet segment 33 is opposite to the bending direction of the fourth permanent magnet segment 34.
  • the structure of the first permanent magnet segment 31 is the same as that of the second permanent magnet segment 32, and the structure of the third permanent magnet segment 33 is the same as that of the fourth permanent magnet segment 34, and the first permanent magnet segment 31 is The structure is the same as that of the fourth permanent magnet segment 34.
  • the permanent magnet 30 includes an inner layer permanent magnet including a first permanent magnet segment 31, a second permanent magnet segment 32, and a third permanent magnet segment 33.
  • the first permanent magnet segment 31 is disposed within the second end of the first slot segment 11.
  • the cross section of the first permanent magnet segment 31 in the radial direction of the rotor body 10 is C-shaped.
  • the second permanent magnet segment 32 is disposed in the second slot segment 12, and the first end of the second permanent magnet segment 32 extends into the first end of the first slot segment 11 and the second end of the second permanent magnet segment 32 extends In the first end to the third groove section 13, the cross section of the second permanent magnet segment 32 in the radial direction of the rotor body 10 is C-shaped.
  • the third permanent magnet segment 33 is disposed in the second end of the third slot segment 13 and disposed opposite the first permanent magnet segment 31.
  • the third permanent magnet segment 33 has a C-shaped cross section along the radial direction of the rotor body 10. .
  • FIGS. 3 and 4 Only the structure of the permanent magnet is shown in FIGS. 3 and 4, and the structure of the magnetic steel groove is not shown.
  • the projections of the first permanent magnet segment 31 and the third permanent magnet segment 33 are disposed toward the straight axis, and the first permanent magnet segment 31 and the third permanent magnet segment 33 have the same structure.
  • This arrangement can effectively improve the performance of the rotor structure.
  • the first permanent magnet segment 31, the second permanent magnet segment 32 and the third permanent magnet segment 33 are symmetrically arranged about a straight axis.
  • the plurality of permanent magnet slots include an outer permanent magnet slot 14, the permanent magnet 30 includes an outer layer permanent magnet, the outer layer permanent magnet is disposed within the outer layer permanent magnet slot 14, and a portion of the outer layer permanent magnet is along a radial direction of the rotor body 10.
  • the cross section of the direction is C-shaped (as shown at f3 in Fig. 4). This arrangement can effectively prevent magnetic leakage of the rotor structure.
  • the cross section of the permanent magnet 30 in the radial direction of the rotor body 10 has a thickness in the middle of the C-shaped structure greater than the thickness of both ends of the C-shaped structure. This arrangement can further reduce the movement of the permanent magnets in the slots and reduce the electromagnetic noise of the motor.
  • the rotor structure in the above embodiment can also be used in the technical field of electrical equipment, that is, according to another aspect of the present invention, a permanent magnet assisted synchronous reluctance motor (hereinafter referred to as a motor) is provided.
  • the motor includes a rotor structure which is the rotor structure in the above embodiment.
  • the rotor structure in the above embodiment can also be used in the technical field of electric vehicle equipment, that is, according to another aspect of the present invention, an electric vehicle is provided.
  • the electric vehicle includes a rotor structure.
  • the rotor structure is the rotor structure in the above embodiment.
  • the same magnetic pole of the rotor structure comprises a plurality of permanent magnets, and the permanent magnets in the same magnetic pole have the same polarity toward the stator direction, and the permanent magnet slots have a shape convex toward the shaft hole 15 side of the rotor, and the rotor structure
  • a section of the permanent magnet slot is generally S-shaped and has two convex and concave shapes in the S-shape.
  • the permanent magnet By setting the permanent magnet groove to the S shape, the permanent magnet can provide a larger magnetic flux area under the same rotor cross-sectional area, increase the permanent magnet flux linkage of the motor, improve the efficiency of the motor, and the S-type
  • the permanent magnet groove can effectively prevent the permanent magnet from being subjected to the movement of the alternating electromagnetic force in the groove, thereby reducing the electromagnetic noise caused by the movement of the permanent magnet.
  • Each of the magnetic pole boundary positions of the rotor structure has a gradually enlarged region surrounded by a permanent magnet in which a rotor punch connection hole is provided.
  • the S-shaped permanent magnet slot of the rotor structure has two C-type permanent magnets, and the two C-type permanent magnets form a substantially S-shaped permanent magnet, which can effectively reduce the manufacturing cost of the permanent magnet.
  • the thickness of the intermediate portion of all C-type permanent magnets may be set to be larger than the thickness of both end portions. It can further reduce the movement of permanent magnets in the slot and reduce the electromagnetic noise of the motor.
  • the two C-type permanent magnets constituting the S-type permanent magnet have the same shape, which can reduce the number of permanent magnets of different shapes and reduce the manufacturing cost of the permanent magnet.
  • the same magnetic pole of the rotor structure comprises a plurality of permanent magnets, which can make the motor obtain a large reluctance torque and have strong anti-demagnetization capability.
  • the permanent magnets in the same magnetic pole have the same polarity toward the stator direction
  • the permanent magnet slots have a shape convex toward the inner side of the rotor
  • a section of the rotor permanent magnet slot is substantially S-shaped, and has two protrusions and recesses in the S-shape. shape.
  • the permanent magnet By setting the permanent magnet groove to the S shape, the permanent magnet can provide a larger magnetic flux area under the same rotor cross-sectional area, increasing the permanent magnet flux linkage of the motor, and using a ferrite having a lower residual magnetism.
  • the rotor can also generate a large air gap flux, which improves the output torque of the motor under unit current, reduces the winding loss of the motor, improves the efficiency of the motor, and the S-type permanent magnet slot can be effective. Preventing the permanent magnet from being subjected to the movement of the alternating electromagnetic force in the groove reduces the electromagnetic noise caused by the movement of the permanent magnet.
  • the boundary points of the magnetic poles of the rotor have a gradually enlarged area surrounded by the inner permanent magnet grooves of the adjacent two magnetic poles, and the rotor punching connection holes are arranged in the area.
  • the rotor punching hole can be prevented from blocking the rotor flux, so that the magnetic line is smoother and the electromagnetic torque of the motor unit current is increased.
  • the surface area of the intermediate C-type permanent magnet is larger than the surface area of the C-type permanent magnets on both sides, and the total surface area of the single-layer permanent magnet can be increased under the same rotor, and the magnetic flux output of the permanent magnet is increased and increased. The efficiency of the motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

本发明提供了一种转子结构、永磁辅助同步磁阻电机及电动汽车。转子结构包括转子本体，转子本体上设置有永磁体槽组，永磁体槽组为多个，多个永磁体槽组沿转子本体的周向间隔地设置，多个永磁体槽组包括第一永磁体槽组，第一永磁体槽组包括沿转子本体的径向方向向外依次设置的多个永磁体槽，多个永磁体槽中至少一个永磁体槽的部分槽段沿转子本体径向方向的横截面呈S形。采用该方案的转子结构，有效地提升了转子结构的永磁体产生的磁通量，加大了具有该转子结构的电机单位电流下的电磁转矩，增大电机的效率。

Description

转子结构、永磁辅助同步磁阻电机及电动汽车 技术领域
本发明涉及电机设备技术领域，具体而言，涉及一种转子结构、永磁辅助同步磁阻电机及电动汽车。
背景技术
电动汽车具有节能、环保等特点，得到了迅速的发展。现有的电动汽车驱动电机为了实现电机的高功率密度、高效率等功能，越来越多的电机采用高性能稀土永磁电机。稀土永磁电机能够实现高效率和高功率密度，主要依赖于高性能的稀土永磁体，目前应用最多的是钕铁硼稀土永磁体。但稀土是一种不可再生资源，价格较为昂贵，并且稀土价格的波动也较大，导致电动汽车驱动电机的生产成本较高，这对于推动电动汽车全面发展是非常不利的。进一步地，现有技术中了还将铁氧体永磁辅助同步磁阻电机应用于电动汽车，但该种电机存在噪声大、易退磁、效率低等问题。
发明内容
本发明的主要目的在于提供一种转子结构、永磁辅助同步磁阻电机及电动汽车，以解决现有技术中电机效率低的问题。
为了实现上述目的，根据本发明的一个方面，提供了一种转子结构，包括：转子本体，转子本体上设置有永磁体槽组，永磁体槽组为多个，多个永磁体槽组沿转子本体的周向间隔地设置，多个永磁体槽组包括第一永磁体槽组，第一永磁体槽组包括沿转子本体的径向方向向外依次设置的多个永磁体槽，多个永磁体槽中至少一个永磁体槽的部分槽段沿转子本体径向方向的横截面呈S形。
进一步地，多个永磁体槽包括第一内层永磁体槽，第一内层永磁体槽包括：第一槽段，第一槽段的第一端朝向转子本体的轴孔延伸，第一槽段的第二端朝向转子本体的外边沿延伸并与转子本体的外边沿具有距离地设置；第二槽段，第二槽段的第一端与第一槽段的第一端相连通，第二槽段沿垂直于转子本体的直轴方向延伸设置；第三槽段，第三槽段的第一端与第二槽段的第二端相连通，第三槽段的第二端朝向转子本体的外边沿延伸并与转子本体的外边沿具有距离地设置，第一槽段与第三槽段相对地设置；其中，第一槽段和/或第三槽段沿转子本体径向方向的横截面呈S形。
进一步地，第一内层永磁体槽为多个，多个第一内层永磁体槽沿转子本体的径向方向间隔地设置。
进一步地，多个永磁体槽还包括：外层永磁体槽，外层永磁体槽与第一内层永磁体槽间隔地设置并位于第一内层永磁体槽的外侧。
进一步地，多个永磁体槽组包括第二永磁体槽组，第二永磁体槽组包括多个永磁体槽，多个永磁体槽包括第二内层永磁体槽，第二内层永磁体槽包括：第四槽段，第四槽段的第一端朝向转子本体的轴孔延伸，第四槽段的第二端朝向转子本体的外边沿延伸并与转子本体的外边沿具有距离地设置，第四槽段与第三槽段相邻地设置；第五槽段，第五槽段的第一端与第四槽段的第一端相连通，第五槽段沿垂直于转子本体的直轴方向延伸设置；第六槽段，第六槽段的第一端与第五槽段的第二端相连通，第六槽段的第二端朝向转子本体的外边沿延伸并与转子本体的外边沿具有距离地设置，第四槽段与第六槽段相对地设置；其中，第四槽段和/或第六槽段沿转子本体径向方向的横截面呈S形。
进一步地，第三槽段沿转子本体径向方向的横截面呈S形，第四槽段沿转子本体径向方向的横截面呈S形，第三槽段与第四槽段关于转子本体的交轴对称地设置。
进一步地，转子结构还包括连接孔，连接孔设置于第三槽段和第四槽段的凹部相对的位置处。
进一步地，各永磁体槽内均设置有永磁体，永磁体沿转子本体径向方向的至少部分的横截面呈C形。
进一步地，永磁体包括内层永磁体，内层永磁体包括：第一永磁体段，第一永磁体段设置于第一槽段的第二端内，第一永磁体段沿转子本体的径向方向的横截面呈C形；第二永磁体段，第二永磁体段设置于第一槽段的第一端内，第二永磁体段沿转子本体的径向方向的横截面呈C形，第一永磁体段的弯曲方向与第二永磁体段的弯曲方向相反。
进一步地，内层永磁体还包括：第三永磁体段，第三永磁体段设置于第三槽段的第二端内并与第一永磁体段相对地设置，第三永磁体段沿转子本体的径向方向的横截面呈C形；第四永磁体段，第四永磁体段设置于第三槽段的第一端内并与第二永磁体段相对地设置，第四永磁体段沿转子本体的径向方向的横截面呈C形，第三永磁体段的弯曲方向与第四永磁体段的弯曲方向相反。
进一步地，第一永磁体段的结构与第二永磁体段的结构相同，和/或第三永磁体段的结构与第四永磁体段的结构相同，和/或第一永磁体段的结构与第四永磁体段的结构相同。
进一步地，永磁体包括内层永磁体，内层永磁体包括：第一永磁体段，第一永磁体段设置于第一槽段的第二端内，第一永磁体段沿转子本体的径向方向的横截面呈C形；第二永磁体段，第二永磁体段设置于第二槽段内，且第二永磁体段的第一端延伸至第一槽段的第一端内，第二永磁体段的第二端延伸至第三槽段的第一端内，第二永磁体段沿转子本体的径向方向的横截面呈C形；第三永磁体段，第三永磁体段设置于第三槽段的第二端内并与第一永磁体段相对地设置，第三永磁体段沿转子本体的径向方向的横截面呈C形。
进一步地，第一永磁体段和第三永磁体段的凸出部朝向直轴设置，第一永磁体段和第三永磁体段的结构相同。
进一步地，第一永磁体段、第二永磁体段和第三永磁体段关于直轴对称地设置。
进一步地，多个永磁体槽包括外层永磁体槽，永磁体包括外层永磁体，外层永磁体设置于外层永磁体槽内，部分的外层永磁体的沿转子本体的径向方向的横截面呈C形。
进一步地，永磁体沿转子本体的径向方向的横截面呈C形结构的中部的厚度大于C形结构的两端的厚度。
根据本发明的另一方面，提供了一种永磁辅助同步磁阻电机，包括转子结构，转子结构为上述转子结构。
根据本发明的另一方面，提供了电动汽车，包括转子结构，转子结构为上述转子结构。
应用本发明的技术方案，采用该方案的转子结构，有效地提升了转子结构的永磁体产生的磁通量，加大了具有该转子结构的电机单位电流下的电磁转矩，增大电机的效率。并且可以有效地防止电机工作时，转子转动过程中由于离心力、震动等影响造成永磁体的震动和偏离，继而有效地降低了永磁体在槽内移动带来的电磁噪声。
附图说明
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1示出了根据本发明的转子结构的第一实施例的结构示意图；
图2示出了根据本发明的转子结构的第二实施例的结构示意图；
图3示出了根据本发明的转子结构的第三实施例的结构示意图；
图4示出了根据本发明的转子结构的第四实施例的结构示意图。
其中，上述附图包括以下附图标记：
10、转子本体；11、第一槽段；12、第二槽段；13、第三槽段；14、外层永磁体槽；15、轴孔；
20、第二内层永磁体槽；21、第四槽段；22、第五槽段；23、第六槽段；
30、永磁体；31、第一永磁体段；32、第二永磁体段；33、第三永磁体段；34、第四永磁体段；
40、连接孔。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。
需要说明的是，本申请的说明书和权利要求书及附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换，以便这里描述的本申请的实施方式例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
为了便于描述，在这里可以使用空间相对术语，如“在……之上”、“在……上方”、“在……上表面”、“上面的”等，用来描述如在图中所示的一个器件或特征与其他器件或特征的空间位置关系。应当理解的是，空间相对术语旨在包含除了器件在图中所描述的方位之外的在使用或操作中的不同方位。例如，如果附图中的器件被倒置，则描述为“在其他器件或构造上方”或“在其他器件或构造之上”的器件之后将被定位为“在其他器件或构造下方”或“在其他器件或构造之下”。因而，示例性术语“在……上方”可以包括“在……上方”和“在……下方”两种方位。该器件也可以其他不同方式定位(旋转90度或处于其他方位)，并且对这里所使用的空间相对描述作出相应解释。
现在，将参照附图更详细地描述根据本申请的示例性实施方式。然而，这些示例性实施方式可以由多种不同的形式来实施，并且不应当被解释为只限于这里所阐述的实施方式。应当理解的是，提供这些实施方式是为了使得本申请的公开彻底且完整，并且将这些示例性实施方式的构思充分传达给本领域普通技术人员，在附图中，为了清楚起见，有可能扩大了层和区域的厚度，并且使用相同的附图标记表示相同的器件，因而将省略对它们的描述。
结合图1至图4所示，根据本发明的实施例，提供了一种转子结构。
具体地，如图1所示，该转子结构包括转子本体10。转子本体10上设置有永磁体槽组，永磁体槽组为多个，多个永磁体槽组沿转子本体10的周向间隔地设置，多个永磁体槽组包括第一永磁体槽组，第一永磁体槽组包括沿转子本体10的径向方向向外依次设置的多个永磁体槽，多个永磁体槽中至少一个永磁体槽的部分槽段沿转子本体10径向方向的横截面呈S形。
在本实施例中，采用该方案的转子结构，有效地提升了转子结构的永磁体产生的磁通量，加大了具有该转子结构的电机单位电流下的电磁转矩，增大电机的效率。并且可以有效地防止电机工作时，转子转动过程中由于离心力、震动等影响造成永磁体的震动和偏离，继而有效地降低了永磁体在槽内移动带来的电磁噪声。
其中，多个永磁体槽包括第一内层永磁体槽。第一内层永磁体槽包括第一槽段11、第二槽段12和第三槽段13。第一槽段11的第一端朝向转子本体10的轴孔延伸，第一槽段11的 第二端朝向转子本体10的外边沿延伸并与转子本体10的外边沿具有距离地设置。第二槽段12的第一端与第一槽段11的第一端相连通。第二槽段12沿垂直于转子本体10的直轴方向延伸设置。第三槽段13的第一端与第二槽段12的第二端相连通，第三槽段13的第二端朝向转子本体10的外边沿延伸并与转子本体10的外边沿具有距离地设置，第一槽段11与第三槽段13相对地设置。其中，第一槽段11和/或第三槽段13沿转子本体10径向方向的横截面呈S形。这样设置能够有效地提高该转子结构的性能。
为了进一步地提高转子结构的性能，可以将第一内层永磁体槽设置为多个，多个第一内层永磁体槽沿转子本体10的径向方向间隔地设置。
多个永磁体槽还包括外层永磁体槽14。外层永磁体槽14与第一内层永磁体槽间隔地设置并位于第一内层永磁体槽的外侧。
其中，多个永磁体槽组包括第二永磁体槽组。第二永磁体槽组包括多个永磁体槽，多个永磁体槽包括第二内层永磁体槽20。第二内层永磁体槽20包括第四槽段21、第五槽段22和第六槽段23。第四槽段21的第一端朝向转子本体10的轴孔延伸，第四槽段21的第二端朝向转子本体10的外边沿延伸并与转子本体10的外边沿具有距离地设置。第四槽段21与第三槽段13相邻地设置。第五槽段22的第一端与第四槽段21的第一端相连通，第五槽段22沿垂直于转子本体10的直轴方向延伸设置。第六槽段23的第一端与第五槽段22的第二端相连通，第六槽段23的第二端朝向转子本体10的外边沿延伸并与转子本体10的外边沿具有距离地设置，第四槽段21与第六槽段23相对地设置；其中，第四槽段21和/或第六槽段23沿转子本体10径向方向的横截面呈S形。
优选地，第三槽段13沿转子本体10径向方向的横截面呈S形，第四槽段21沿转子本体10径向方向的横截面呈S形，第三槽段13与第四槽段21关于转子本体10的交轴对称地设置。
为了提高转子结构的稳定性，转子结构还包括连接孔40。连接孔40设置于第三槽段13和第四槽段21的凹部相对的位置处，其中，如图1所示，f1处为凹部，f2处为凸部，d为直轴，q为交轴。
如图2和图3所示，各永磁体槽内均设置有永磁体30。永磁体30沿转子本体10径向方向的至少部分的横截面呈C形。永磁体30包括内层永磁体。内层永磁体包括第一永磁体段31和第二永磁体段32。第一永磁体段31设置于第一槽段11的第二端内，第一永磁体段31沿转子本体10的径向方向的横截面呈C形。第二永磁体段32设置于第一槽段11的第一端内，第二永磁体段32沿转子本体10的径向方向的横截面呈C形，第一永磁体段31的弯曲方向与第二永磁体段32的弯曲方向相反。
内层永磁体还包括第三永磁体段33和第四永磁体段34。第三永磁体段33设置于第三槽段13的第二端内并与第一永磁体段31相对地设置，第三永磁体段33沿转子本体10的径向方向的横截面呈C形。第四永磁体段34设置于第三槽段13的第一端内并与第二永磁体段32相对地设置，第四永磁体段34沿转子本体10的径向方向的横截面呈C形，第三永磁体段33的弯曲方向与第四永磁体段34的弯曲方向相反。
其中，优选地，第一永磁体段31的结构与第二永磁体段32的结构相同，第三永磁体段33的结构与第四永磁体段34的结构相同，第一永磁体段31的结构与第四永磁体段34的结构相同。
如图4所示，根据本申请的另一个实施例中，永磁体30包括内层永磁体，内层永磁体包括第一永磁体段31、第二永磁体段32和第三永磁体段33。第一永磁体段31设置于第一槽段11的第二端内。第一永磁体段31沿转子本体10的径向方向的横截面呈C形。第二永磁体段32设置于第二槽段12内，且第二永磁体段32的第一端延伸至第一槽段11的第一端内，第二永磁体段32的第二端延伸至第三槽段13的第一端内，第二永磁体段32沿转子本体10的径向方向的横截面呈C形。第三永磁体段33设置于第三槽段13的第二端内并与第一永磁体段31相对地设置，第三永磁体段33沿转子本体10的径向方向的横截面呈C形。其中，图3和图4中仅示出了永磁体的结构，磁钢槽的结构未示出。
如图4所示，第一永磁体段31和第三永磁体段33的凸出部朝向直轴设置，第一永磁体段31和第三永磁体段33的结构相同。这样设置能够有效地提高该转子结构的性能。优选地，第一永磁体段31、第二永磁体段32和第三永磁体段33关于直轴对称地设置。
多个永磁体槽包括外层永磁体槽14，永磁体30包括外层永磁体，外层永磁体设置于外层永磁体槽14内，部分的外层永磁体的沿转子本体10的径向方向的横截面呈C形(如图4中f3处所示)。这样设置能够有效地避免转子结构发生漏磁。
如图2所示，永磁体30沿转子本体10的径向方向的横截面呈C形结构的中部的厚度大于C形结构的两端的厚度。这样设置可以进一步减少永磁体在槽内移动，减低电机电磁噪声。
上述实施例中的转子结构还可以用于电机设备技术领域，即根据本发明的另一方面，提供了一种永磁辅助同步磁阻电机(以下简称电机)。该电机包括转子结构，转子结构为上述实施例中的转子结构。
上述实施例中的转子结构还可以用于电动车设备技术领域，即根据本发明的另一方面，提供了一种电动汽车。该电动车包括转子结构。转子结构为上述实施例中的转子结构。
具体地，转子结构的同一个磁极上包含多层永磁体，同一磁极内的永磁体朝定子方向具有相同的极性，永磁体槽具有朝转子的轴孔15一侧凸起的形状，转子结构的永磁体槽的一段大致呈S型，在S型中具有2个凸起及凹入的形状。通过将永磁体槽设置成S型，可以在相同的转子截面积下，使得永磁体提供磁通的面积更大，增大了电机的永磁体磁链，提高了电机的效率，并且S型的永磁体槽可以有效防止永磁体由于承受交变电磁力在槽内的移动，减少了永磁体移动带来的电磁噪声。
转子结构的各磁极分界线位置具有一个由永磁体包围的逐渐放大的区域，在该区域内设置有转子冲片连接孔。通过形成一个放大的区域，可以减少转子冲片连接孔对转子磁通的阻挡，使得磁力线更加顺畅，提升了电机单位电流下的电磁转矩。
转子结构的一个S型的永磁体槽内具有两个C型永磁体，通过两个C型永磁体组成一个大致呈S型的永磁体，可以有效减少永磁体的制造成本。可以将所有C型永磁体的中间部位厚度设置成大于两端部位厚度。能够进一步减少永磁体在槽内移动，减低电机电磁噪声。转子同一层永磁体槽内，组成S型永磁体的两个C型永磁体具有相同的形状，可以减少不同形状永磁体的个数，降低永磁体的制造成本。
转子结构的同一层永磁体槽内，中间具有一个C型永磁体，两侧具有两个形状相同的C型永磁体。可以缩减永磁体的个数，减少永磁体制造成本以及永磁体装配难度。
在本申请中，转子结构的同一个磁极上包含多层永磁体，可以使得电机获得较大的磁阻转矩，并且具有较强的抗退磁能力。同一磁极内的永磁体朝定子方向具有相同的极性，永磁体槽具朝转子内侧凸起的形状，转子永磁体槽的一段大致呈S型，在S型中具有2个凸起及凹入的形状。通过将永磁体槽设置成S型，可以在相同的转子截面积下，使得永磁体提供磁通的面积更大，增大了电机的永磁体磁链，在使用剩磁较低的铁氧体永磁体时，也可以使得转子产生较大的气隙磁通，提高了电机单位电流下的输出转矩，减少了电机的绕组损耗，提升了电机的效率，并且S型的永磁体槽可以有效防止永磁体由于承受交变电磁力在槽内的移动，减少了永磁体移动带来的电磁噪声。
其中，转子各磁极分界线位置具有一个由相邻两个磁极的内层永磁体槽包围的逐渐放大区域，在该区域内设置有转子冲片连接孔。通过形成一个放大的区域，可以减少转子冲片连接孔对转子磁通的阻挡，使得磁力线更加顺畅，提升了电机单位电流下的电磁转矩。
如图4所示，中间C型永磁体的表面积大于两侧C型永磁体的表面积，可以在相同的转子下，增加单层永磁体总的表面积，提升永磁体的磁通输出量，增大电机的效率。
除上述以外，还需要说明的是在本说明书中所谈到的“一个实施例”、“另一个实施例”、“实施例”等，指的是结合该实施例描述的具体特征、结构或者特点包括在本申请概括性描述的至少一个实施例中。在说明书中多个地方出现同种表述不是一定指的是同一个实施例。进一步来说，结合任一实施例描述一个具体特征、结构或者特点时，所要主张的是结合其他实施例来实现这种特征、结构或者特点也落在本发明的范围内。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (18)

  1. 一种转子结构，其特征在于，包括：
    转子本体(10)，所述转子本体(10)上设置有永磁体槽组，所述永磁体槽组为多个，多个所述永磁体槽组沿所述转子本体(10)的周向间隔地设置，多个所述永磁体槽组包括第一永磁体槽组，所述第一永磁体槽组包括沿所述转子本体(10)的径向方向向外依次设置的多个永磁体槽，多个所述永磁体槽中至少一个所述永磁体槽的部分槽段沿所述转子本体(10)径向方向的横截面呈S形。
  2. 根据权利要求1所述的转子结构，其特征在于，多个所述永磁体槽包括第一内层永磁体槽，所述第一内层永磁体槽包括：
    第一槽段(11)，所述第一槽段(11)的第一端朝向所述转子本体(10)的轴孔延伸，所述第一槽段(11)的第二端朝向所述转子本体(10)的外边沿延伸并与所述转子本体(10)的外边沿具有距离地设置；
    第二槽段(12)，所述第二槽段(12)的第一端与所述第一槽段(11)的第一端相连通，所述第二槽段(12)沿垂直于所述转子本体(10)的直轴方向延伸设置；
    第三槽段(13)，所述第三槽段(13)的第一端与所述第二槽段(12)的第二端相连通，所述第三槽段(13)的第二端朝向所述转子本体(10)的外边沿延伸并与所述转子本体(10)的外边沿具有距离地设置，所述第一槽段(11)与所述第三槽段(13)相对地设置；
    其中，所述第一槽段(11)和/或所述第三槽段(13)沿所述转子本体(10)径向方向的横截面呈S形。
  3. 根据权利要求2所述的转子结构，其特征在于，所述第一内层永磁体槽为多个，多个所述第一内层永磁体槽沿所述转子本体(10)的径向方向间隔地设置。
  4. 根据权利要求2或3所述的转子结构，其特征在于，多个所述永磁体槽还包括：
    外层永磁体槽(14)，所述外层永磁体槽(14)与所述第一内层永磁体槽间隔地设置并位于所述第一内层永磁体槽的外侧。
  5. 根据权利要求2或3所述的转子结构，其特征在于，多个所述永磁体槽组包括第二永磁体槽组，所述第二永磁体槽组包括多个永磁体槽，多个所述永磁体槽包括第二内层永磁体槽(20)，所述第二内层永磁体槽(20)包括：
    第四槽段(21)，所述第四槽段(21)的第一端朝向所述转子本体(10)的轴孔延伸，所述第四槽段(21)的第二端朝向所述转子本体(10)的外边沿延伸并与所述转子本体(10)的外边沿具有距离地设置，所述第四槽段(21)与所述第三槽段(13)相邻地设置；
    第五槽段(22)，所述第五槽段(22)的第一端与所述第四槽段(21)的第一端相 连通，所述第五槽段(22)沿垂直于所述转子本体(10)的直轴方向延伸设置；
    第六槽段(23)，所述第六槽段(23)的第一端与所述第五槽段(22)的第二端相连通，所述第六槽段(23)的第二端朝向所述转子本体(10)的外边沿延伸并与所述转子本体(10)的外边沿具有距离地设置，所述第四槽段(21)与所述第六槽段(23)相对地设置；
    其中，所述第四槽段(21)和/或所述第六槽段(23)沿所述转子本体(10)径向方向的横截面呈S形。
  6. 根据权利要求5所述的转子结构，其特征在于，所述第三槽段(13)沿所述转子本体(10)径向方向的横截面呈S形，所述第四槽段(21)沿所述转子本体(10)径向方向的横截面呈S形，所述第三槽段(13)与所述第四槽段(21)关于所述转子本体(10)的交轴对称地设置。
  7. 根据权利要求6所述的转子结构，其特征在于，所述转子结构还包括连接孔(40)，所述连接孔(40)设置于所述第三槽段(13)和所述第四槽段(21)的凹部相对的位置处。
  8. 根据权利要求2或3所述的转子结构，其特征在于，各所述永磁体槽内均设置有永磁体(30)，所述永磁体(30)沿所述转子本体(10)径向方向的至少部分的横截面呈C形。
  9. 根据权利要求8所述的转子结构，其特征在于，所述永磁体(30)包括内层永磁体，所述内层永磁体包括：
    第一永磁体段(31)，所述第一永磁体段(31)设置于所述第一槽段(11)的第二端内，所述第一永磁体段(31)沿所述转子本体(10)的径向方向的横截面呈C形；
    第二永磁体段(32)，所述第二永磁体段(32)设置于所述第一槽段(11)的第一端内，所述第二永磁体段(32)沿所述转子本体(10)的径向方向的横截面呈C形，所述第一永磁体段(31)的弯曲方向与所述第二永磁体段(32)的弯曲方向相反。
  10. 根据权利要求9所述的转子结构，其特征在于，所述内层永磁体还包括：
    第三永磁体段(33)，所述第三永磁体段(33)设置于所述第三槽段(13)的第二端内并与所述第一永磁体段(31)相对地设置，所述第三永磁体段(33)沿所述转子本体(10)的径向方向的横截面呈C形；
    第四永磁体段(34)，所述第四永磁体段(34)设置于所述第三槽段(13)的第一端内并与所述第二永磁体段(32)相对地设置，所述第四永磁体段(34)沿所述转子本体(10)的径向方向的横截面呈C形，所述第三永磁体段(33)的弯曲方向与所述第四永磁体段(34)的弯曲方向相反。
  11. 根据权利要求10所述的转子结构，其特征在于，
    所述第一永磁体段(31)的结构与所述第二永磁体段(32)的结构相同，和/或
    所述第三永磁体段(33)的结构与所述第四永磁体段(34)的结构相同，和/或
    所述第一永磁体段(31)的结构与所述第四永磁体段(34)的结构相同。
  12. 根据权利要求8所述的转子结构，其特征在于，所述永磁体(30)包括内层永磁体，所述内层永磁体包括：
    第一永磁体段(31)，所述第一永磁体段(31)设置于所述第一槽段(11)的第二端内，所述第一永磁体段(31)沿所述转子本体(10)的径向方向的横截面呈C形；
    第二永磁体段(32)，所述第二永磁体段(32)设置于所述第二槽段(12)内，且所述第二永磁体段(32)的第一端延伸至所述第一槽段(11)的第一端内，所述第二永磁体段(32)的第二端延伸至所述第三槽段(13)的第一端内，所述第二永磁体段(32)沿所述转子本体(10)的径向方向的横截面呈C形；
    第三永磁体段(33)，所述第三永磁体段(33)设置于所述第三槽段(13)的第二端内并与所述第一永磁体段(31)相对地设置，所述第三永磁体段(33)沿所述转子本体(10)的径向方向的横截面呈C形。
  13. 根据权利要求12所述的转子结构，其特征在于，所述第一永磁体段(31)和所述第三永磁体段(33)的凸出部朝向所述直轴设置，所述第一永磁体段(31)和所述第三永磁体段(33)的结构相同。
  14. 根据权利要求12所述的转子结构，其特征在于，所述第一永磁体段(31)、所述第二永磁体段(32)和所述第三永磁体段(33)关于所述直轴对称地设置。
  15. 根据权利要求8所述的转子结构，其特征在于，多个所述永磁体槽包括外层永磁体槽(14)，所述永磁体(30)包括外层永磁体，所述外层永磁体设置于所述外层永磁体槽(14)内，部分的所述外层永磁体的沿所述转子本体(10)的径向方向的横截面呈C形。
  16. 根据权利要求8所述的转子结构，其特征在于，所述永磁体(30)沿所述转子本体(10)的径向方向的横截面呈C形结构的中部的厚度大于C形结构的两端的厚度。
  17. 一种永磁辅助同步磁阻电机，包括转子结构，其特征在于，所述转子结构为权利要求1至16中任一项所述转子结构。
  18. 一种电动汽车，包括转子结构，其特征在于，所述转子结构为权利要求1至16中任一项所述转子结构。
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