WO2017202317A1 - Moteur à double antipode et véhicule électrique - Google Patents

Moteur à double antipode et véhicule électrique Download PDF

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Publication number
WO2017202317A1
WO2017202317A1 PCT/CN2017/085589 CN2017085589W WO2017202317A1 WO 2017202317 A1 WO2017202317 A1 WO 2017202317A1 CN 2017085589 W CN2017085589 W CN 2017085589W WO 2017202317 A1 WO2017202317 A1 WO 2017202317A1
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WO
WIPO (PCT)
Prior art keywords
magnetic steel
motor
rotor
electric machine
machine according
Prior art date
Application number
PCT/CN2017/085589
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English (en)
Chinese (zh)
Inventor
马冰青
吴施汛
齐文明
Original Assignee
比亚迪股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201620508024.2U external-priority patent/CN205986384U/zh
Priority claimed from CN201610363614.5A external-priority patent/CN107437857A/zh
Application filed by 比亚迪股份有限公司 filed Critical 比亚迪股份有限公司
Publication of WO2017202317A1 publication Critical patent/WO2017202317A1/fr

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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
    • 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 motor technology, and in particular to a two-pole motor and an electric vehicle having the two-pole motor.
  • a motor mainly includes a housing, a stator assembly, and a rotor assembly.
  • the outer casing includes a cylinder having an opening at the front end, a stator assembly is disposed in the outer casing, the stator assembly includes a stator core and a core winding, and the rotor assembly includes a rotating shaft, a permanent magnet and a rotor core;
  • the core is set on the rotating shaft, and the rotor core is uniformly provided with a plurality of permanent magnets on the outer circumference;
  • the front end of the outer casing is provided with an end surface, and the upper end of the outer casing is provided with a junction box to supply power to the winding.
  • the present invention provides a two-pole electric motor including a housing, a motor rotor and a motor stator mounted in the housing, the motor rotor including a rotor core made of an amorphous alloy material, the rotor
  • the iron core has two pairs of poles, and the motor stator includes a stator core made of a silicon steel material.
  • the present invention also provides an electric vehicle including a drive motor, which is a two-pole motor provided by the present invention.
  • the two-pole motor provided by the present invention can provide a larger power output in a smaller size. Especially suitable for drive motors running at very high speeds.
  • FIG. 1 is a first perspective view of a motor according to an embodiment of the present invention
  • FIG. 2 is a second perspective view of a motor according to an embodiment of the present invention.
  • FIG. 3 is an exploded perspective view of a motor according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a rotor of a motor according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural view of a magnetic steel trough provided by an embodiment of the present invention, wherein in order to clearly show the angle, the angle is enlarged by several times when other features are unchanged;
  • Fig. 6 is a schematic structural view of an electric vehicle according to an embodiment of the present invention.
  • orientation words such as “up, down, left, and right” are generally defined on the basis of the drawing direction of the drawing, and the "inside and outside” means correspondingly. Inside and outside of the contour of the part.
  • the present invention provides at least an electric motor rotor punch, an electric motor rotor, an electric motor 1000, and an electric vehicle 2000.
  • the motor 1000 can be a two-pole motor, a permanent magnet synchronous motor, or a two-pole permanent magnet synchronous motor, and the motor of the present invention can also be other types of motors known in the art, such as an asynchronous motor or the like.
  • an ultra-high speed motor that is, a motor having a rotational speed of more than 20,000 rpm (revolutions per minute)
  • the various motors mentioned in the present invention are also particularly suitable for use in a drive motor of an electric vehicle.
  • two-pole and “permanent magnet synchronization” as used in the present invention are terms well known in the art.
  • two pairs of poles mean that two pairs of magnetic poles are disposed on the rotor of the motor.
  • the more the number of magnetic pole pairs, when the motor speed is high, especially when the motor in the present invention is an ultra-high speed motor the higher the alternating frequency of the magnetic field, the more heat generated by the motor, and the requirements for the cooling system are also The higher the speed, the higher the iron consumption of the motor. Therefore, the two-pole motor is more suitable for use in ultra-high speed running motors.
  • three pairs of poles or four pairs of poles may also be used.
  • the permanent magnet synchronous motor is also suitable for use in the drive motor of an electric vehicle. In terms of performance, it may include the advantages of high efficiency, high power factor, small volume, light weight, and low temperature rise.
  • a permanent magnet is used to establish a rotor magnetic field.
  • the motor has a sufficiently large starting torque and does not require a large starting current, and is suitable for a driving motor driven by a power battery pack.
  • the permanent magnet synchronous motor has high efficiency, the resistance loss in the rotor winding is low, and there is little or no reactive current in the stator winding, which makes the motor temperature rise low, and can also prolong the service life of the motor.
  • the advantages brought by other permanent magnet synchronous motors are not described too much.
  • the permanent magnet synchronous motor has a simple structure, which makes the permanent magnet synchronous motor processing and distribution cost less, and the operation is more reliable.
  • the permanent magnet synchronous motor uses the rare earth permanent magnet to increase the air gap magnetic density and raise the motor speed to The best, which significantly reduces the size of the motor, improves the power to mass ratio; in addition, because the excitation copper consumption is saved, the motor efficiency Significantly improved.
  • the motor provided by the embodiment of the present invention includes a housing 400, a motor rotor 300 and a motor stator 500 installed in the housing 400, and the motor stator 500 is fixed in the housing 400.
  • the motor rotor 300 is rotatably disposed at the center of the motor stator 500.
  • the motor rotor 300 includes a rotor core 310 formed by stacking a plurality of rotor blades, and a rotating shaft 320 coupled to the rotor core 310.
  • the center of rotation of the punching body 100 of the rotor core is formed with a rotating shaft hole 101, and a pair of keys 102 for engaging with the rotating shaft, that is, the rotor core 310, are symmetrically formed on the side wall of the rotating shaft hole 101.
  • the rotating shaft 320 is a key connection mode.
  • the rotor core 310 and the rotating shaft 320 may also be connected by other transmission connections known to those skilled in the art, for example, using a non-circular cross-section connection.
  • an oil hole 103 may be formed in the rotor punch to form a part of the rotor oil passage, and the lubricant may be cooled by flowing the lubricating oil in the rotor.
  • the housing 400 has an end cover 800 away from the power output end.
  • the end cover 800 may be formed with a bearing chamber.
  • the inner end of the rotating shaft 320 is installed in the bearing chamber through the deep groove ball bearing 600, and protrudes from the outer end of the housing 400. It can be used as a power output.
  • the junction box 700 mounted on the housing can be externally connected to a power source, for example, electrically connected to the power battery pack to generate a magnetic field for powering the winding 900, thereby enabling operation of the motor.
  • an air gap is provided between the rotor and the stator of the motor to enable the motor to operate normally.
  • the motor rotor blank provided includes a punch body 100 having a magnetic steel groove 200 for magnetic steel insertion formed thereon, that is, using magnetic steel as
  • the permanent magnets form the rotor poles, that is, the permanent magnets in the embodiment adopt an embedded mounting manner, which can effectively ensure the stability of the rotor when rotating at an ultra-high speed, compared with the surface-mounted permanent magnet mounting method, embedded
  • the permanent magnet mounting method is more suitable for rotors that operate at very high speeds.
  • the magnetic steel accommodated in the magnetic steel tank will have a tendency to deform under the action of centrifugal force, that is, tensile stress is generated inside the magnetic steel, and at the same time, the pressure is resisted due to the resistance of the magnetic steel groove.
  • Stress in which the tensile strength of the magnetic steel is much lower than its compressive strength.
  • the tensile strength is only 85 MPa, and the compressive strength can be above 1000 MPa.
  • the resulting tensile stress can affect the life of the magnetic steel.
  • the groove shape of the magnetic steel groove is improved, and the manner may include converting the tensile stress received by the magnetic steel into a compressive stress.
  • the magnetic steel groove 200 has a straight groove section 201 and a dip angle section 202 on both sides of the straight groove section 201 along the surface direction of the punching body 100, and the dip angle section 202 is away from the center of rotation of the punching body 100.
  • the first side edge is inclined outwardly from the end of the straight groove section 201, and the straight groove section 201 and the inclined section 202 on both sides of the straight groove section 201 together constitute a closed cross section of the magnetic steel groove 200 on the surface of the punching body 100. profile.
  • the closed cross-sectional profile of the magnetic steel groove 200 at the surface of the punch body 100 is divided by a broken line into a straight groove segment 201 and a dip segment 202.
  • a buffer zone for generating a slight deformation can be provided for both ends of the magnetic steel in the magnetic steel groove 200, that is, the magnetic steel is allowed to be magnetic when the rotor rotates.
  • a slight deformation in the steel trough 200 to release the internal tension generated in the magnetic steel Force which in turn increases the life of the magnet.
  • an angle can be formed on the existing one-shaped magnetic steel groove.
  • the angle ⁇ between the first side edge of the inclined section 202 and the straight groove section 201 is 0.5 ° - 2 °, for example with a 1 ° tilt.
  • FIG. 5 is a view in which the angle ⁇ is enlarged several times in the case where other features are not changed, to clearly show the inclination section 202. This improvement in the magnetic steel tank 200 can effectively increase the life of the magnetic steel.
  • the punch body 100 is made of an amorphous alloy material, that is, the rotor core in the embodiment of the present invention is made of an amorphous alloy material, and the strength of the punch body 100 can be increased.
  • the tensile strength of the characteristics of the amorphous alloy material is several tens of times that of the ordinary silicon steel material, so that the improvement of the magnetic steel groove 200 causes the strength sacrificed by the punch body 100 to be compensated by the material, and its strength is greatly increased. It is higher than the strength of the rotor sheet of the prior art silicon steel material, thereby ensuring the life of the magnetic steel and ensuring the strength and life of the rotor core.
  • the rotor core is made of an amorphous alloy material
  • the rotor core has the characteristics of high magnetic permeability, high electrical conductivity, small eddy current loss, and the like, and the performance of the motor is greatly improved.
  • the use of amorphous alloy material to make the rotor core can not only improve the rotor capacity, but also solve the key problem of how to achieve high power output through a small volume, enabling the drive motor in the electric vehicle field. Great progress has been made.
  • the inventor of the present invention has a design idea that the inventors have found that in the field of electric vehicles, it is difficult to increase the volume of the motor due to the space layout, and thus it is difficult to increase the torque of the motor.
  • the inventors also considered that when the motor speed reached an ultra-high speed of 20,000 rpm, it was limited by the yield strength of ordinary silicon steel sheets, and the designed motor volume would be too small. When the motor volume is too small, although the rotation speed is high, it will directly affect the torque output of the motor, which cannot meet the requirements of the drive motor.
  • the inventors of the present application have adopted an amorphous alloy material to form a rotor to solve the problem that the outer diameter of the rotor is limited, that is, to ensure that the motor can be operated at an ultra-high speed while increasing the volume of the motor as much as possible to increase the torque. Further increase the motor power. Further, the motor provided by the present invention does not simply manufacture all components using an amorphous alloy material. Except for the cost factor, the present invention also finds that under the current process conditions, the width of the amorphous alloy strip is limited. If the amorphous alloy strip is used as the motor stator, the produced motor is too small and affects the power of the motor. Output.
  • the various motors provided by the embodiments of the present invention only use the amorphous alloy material for the rotor core, and the stator can be selected.
  • the present invention skillfully uses an amorphous alloy material for the manufacture of a rotor, which not only achieves the beneficial effect of improving the life of the magnetic steel during ultra-high speed operation, but also enables the designed motor to be small in size without being too small, that is,
  • the use of amorphous alloy materials for the manufacture of rotor cores has also produced unexpected technical effects, achieving a variety of effects. Especially suitable for the requirements of high-power and small-volume drive motors, the performance of the drive motor has been greatly improved.
  • the two inclined sections 202 may be designed to be symmetrically disposed with respect to the central axis of the straight groove section 201. That is, the structure of the two dip segments 202 is substantially the same.
  • the second side edge of the inclined section 202 close to the center of rotation of the punch body 100 is arranged in line with the straight groove section 201. That is, only the outer first side edge line of the inclined section 202 is inclined with respect to the straight groove section 201, thereby ensuring the small deformation of the magnetic steel at both ends outward under the centrifugal force, and better accommodating the magnetic steel.
  • the length of the straight groove segment 201 may be designed to account for 1/2-3/4 of the length of the magnetic steel accommodated in the magnetic steel groove along the surface of the punching body 100. . Thereby, the deformation of the magnetic steel is better buffered, and the magnetic steel groove is prevented from exerting unnecessary destructive force on the magnetic steel.
  • the rotor magnetic pole there are a plurality of magnetic steel grooves 200, and the plurality of magnetic steel grooves 200 are formed to obtain a magnetic steel groove group constituting a rotor magnetic pole, that is, the plurality of magnetic steel grooves 200 are formed.
  • the magnetic steel groove group and the magnetic steel groove group constitute a rotor magnetic pole, wherein one magnetic steel groove group can form a rotor magnetic pole.
  • the magnetic steel groove group includes a first magnetic shape symmetrically arranged with respect to a first diameter of the punch body (as a case, the first diameter is a diameter in the vertical direction on the punch body 100, as shown in FIG.
  • the steel trough 210 and the second magnetic steel trough 220, the first magnetic steel trough 210 and the second magnetic steel trough 220 are arranged in a first V-shape that is open to the outside.
  • the magnetic steel of the present invention is arranged in a V-shaped configuration.
  • the magnetic steel groove group further includes a third magnetic steel groove 230 and a fourth magnetic steel groove 240 symmetrically arranged with respect to the first diameter, the third The magnetic steel groove 230 and the fourth magnetic steel groove 240 are arranged in a second V-shape that is open to the outside and are spaced apart from the radially inner side of the first magnetic steel groove 210 and the second magnetic steel groove 220. That is, in the present invention, one magnetic pole may include four magnetic steels, thereby making full use of the space of the punching body, which is especially suitable for a small-sized driving motor.
  • the space is utilized reasonably, and optionally, the angle of the second V-shaped is smaller than the angle of the first V-shaped.
  • the outer magnetic steel can better utilize the space in the chord direction of the punch body, so that the inner magnetic steel can better utilize the space in the radial direction of the punch body, the layout is more reasonable, and the magnetic field is generated more effectively.
  • the plurality of magnetic steel groove groups are respectively configured to constitute a plurality of rotor magnetic poles, and the plurality of magnetic steel groove groups are evenly distributed and uniformly distributed on the punch body in the circumferential direction.
  • the magnetic steel groove group is four to constitute two pairs of poles of the motor rotor.
  • a different number of sets of magnetic steel slots may be provided depending on the number of pole pairs.
  • the punching body 100 is formed with oil holes 103 uniformly distributed in the circumferential direction, and the oil holes 103 are located between adjacent magnetic steel groove groups to fully utilize the punching
  • the sheet body space in addition to the oil hole 103, can reduce the weight of the rotor and reduce the rotor moment of inertia.
  • the center of rotation of the punching main body 100 is formed with a rotating shaft hole 101, and a pair of keys 102 for engaging with the rotating shaft are symmetrically formed on the side wall of the rotating shaft hole 101, and the key 102 is convex toward the center of the circle And the pair of keys 102 are located on the first diameter. That is, the key is a convex structure rather than a concave structure, thereby facilitating the torque transmission in cooperation with the keyway on the rotating shaft.
  • reinforcing ribs are disposed between the symmetrically arranged magnetic steel grooves to enhance the strength of the punch body.
  • a magnetic bridge or a magnetic isolation hole is disposed between the magnetic steel groove and the edge of the punch body.
  • the magnetic bridge can be as small as possible, which will reduce the magnetic flux leakage and increase the air gap magnetic density.
  • the magnetic isolation hole can improve the air gap magnetic density waveform, thereby improving the performance of the motor.
  • the motor provided by the invention is more suitable for the driving motor of the electric vehicle, wherein the iron consumption is relatively low, the output power is improved, and the problem of large noise caused by the amorphous motor is avoided.
  • the stator and rotor structures have been redesigned. Increasing the strength of the rotor structure can not only be made into an ultra-high-speed motor, but also has excellent electromagnetic performance. Only the rotor core uses an amorphous alloy, which reduces the processing difficulty and reduces the cost of the process.
  • the volume of the motor is not limited by the amorphous alloy material, so that it can exert greater torque and power.
  • the alternating frequency of the magnetic field is minimized, the iron loss is reduced, the heat dissipation is reduced, and the control of the motor is easily realized, so that the performance of the motor is significantly improved, and the performance of the electric vehicle is indirectly improved. More practical.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un moteur à double antipode et un véhicule électrique utilisant le moteur à double antipode. Le moteur à double antipode (1000) comprend un boîtier (400), et comprend un rotor de moteur (300) et un stator de moteur (500) monté dans le boîtier (400). Le rotor de moteur comprend un noyau de rotor (310) constitué d'un matériau d'alliage amorphe. Le noyau de rotor présente un double antipode, et le stator de moteur (500) comprend un noyau de stator constitué d'un matériau en acier au silicium. Le moteur à double antipode peut fournir une puissance de sortie élevée en utilisant une taille plus petite, et est particulièrement applicable à un moteur d'entraînement fonctionnant à très grande vitesse.
PCT/CN2017/085589 2016-05-27 2017-05-23 Moteur à double antipode et véhicule électrique WO2017202317A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201620508024.2U CN205986384U (zh) 2016-05-27 2016-05-27 两对极电机和电动汽车
CN201610363614.5A CN107437857A (zh) 2016-05-27 2016-05-27 两对极电机和电动汽车
CN201610363614.5 2016-05-27
CN201620508024.2 2016-05-27

Publications (1)

Publication Number Publication Date
WO2017202317A1 true WO2017202317A1 (fr) 2017-11-30

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PCT/CN2017/085589 WO2017202317A1 (fr) 2016-05-27 2017-05-23 Moteur à double antipode et véhicule électrique

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WO (1) WO2017202317A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109301977A (zh) * 2018-11-30 2019-02-01 重庆长基科技有限公司 一种外转子无刷无槽电机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3428896B2 (ja) * 1998-05-07 2003-07-22 オークマ株式会社 トルクリップルを低減したモータ
CN101951051A (zh) * 2009-06-18 2011-01-19 勃姆巴迪尔运输有限公司 用于轨道车辆电机的转子、这种电机及具有这种电机的轨道车辆
CN103280904A (zh) * 2013-05-03 2013-09-04 苏州和鑫电气股份有限公司 电动汽车用双层v型内置式永磁电机转子
CN105322668A (zh) * 2015-10-22 2016-02-10 南通巨升非晶科技有限公司 一种采用非晶铁芯的伺服电机
CN205829324U (zh) * 2016-05-27 2016-12-21 比亚迪股份有限公司 电机和电动汽车
CN205829322U (zh) * 2016-05-27 2016-12-21 比亚迪股份有限公司 永磁同步电机和电动汽车
CN205986384U (zh) * 2016-05-27 2017-02-22 比亚迪股份有限公司 两对极电机和电动汽车
CN206077183U (zh) * 2016-05-27 2017-04-05 比亚迪股份有限公司 两对极永磁同步电机和电动汽车

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3428896B2 (ja) * 1998-05-07 2003-07-22 オークマ株式会社 トルクリップルを低減したモータ
CN101951051A (zh) * 2009-06-18 2011-01-19 勃姆巴迪尔运输有限公司 用于轨道车辆电机的转子、这种电机及具有这种电机的轨道车辆
CN103280904A (zh) * 2013-05-03 2013-09-04 苏州和鑫电气股份有限公司 电动汽车用双层v型内置式永磁电机转子
CN105322668A (zh) * 2015-10-22 2016-02-10 南通巨升非晶科技有限公司 一种采用非晶铁芯的伺服电机
CN205829324U (zh) * 2016-05-27 2016-12-21 比亚迪股份有限公司 电机和电动汽车
CN205829322U (zh) * 2016-05-27 2016-12-21 比亚迪股份有限公司 永磁同步电机和电动汽车
CN205986384U (zh) * 2016-05-27 2017-02-22 比亚迪股份有限公司 两对极电机和电动汽车
CN206077183U (zh) * 2016-05-27 2017-04-05 比亚迪股份有限公司 两对极永磁同步电机和电动汽车

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109301977A (zh) * 2018-11-30 2019-02-01 重庆长基科技有限公司 一种外转子无刷无槽电机
CN109301977B (zh) * 2018-11-30 2024-03-08 重庆长基科技有限公司 一种外转子无刷无槽电机

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