WO2023240970A1 - Rotor de moteur, moteur et véhicule électrique - Google Patents

Rotor de moteur, moteur et véhicule électrique Download PDF

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Publication number
WO2023240970A1
WO2023240970A1 PCT/CN2022/140703 CN2022140703W WO2023240970A1 WO 2023240970 A1 WO2023240970 A1 WO 2023240970A1 CN 2022140703 W CN2022140703 W CN 2022140703W WO 2023240970 A1 WO2023240970 A1 WO 2023240970A1
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WIPO (PCT)
Prior art keywords
arc
groove
magnetic
magnetic steel
magnetic barrier
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PCT/CN2022/140703
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English (en)
Chinese (zh)
Inventor
陈彬
贾金信
刘健宁
姜月明
汪汉新
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珠海格力电器股份有限公司
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Publication of WO2023240970A1 publication Critical patent/WO2023240970A1/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
    • 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
    • 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

Definitions

  • the present disclosure relates to the field of motor technology, and specifically to a motor rotor, a motor and an electric vehicle.
  • the commonly used method to reduce electromagnetic excitation force is to modify the rotor or stator, which can reduce the torque ripple and excitation force at a certain operating point.
  • the motors due to their The speed range is wide and the working conditions are complex, so simple modification methods often cannot meet the requirements.
  • vehicle motors have technical problems such as large torque pulsation and high electromagnetic excitation force under multiple working conditions, which cannot be solved at the same time, the present disclosure researches and designs a motor rotor, a motor and an electric motor. car.
  • a motor rotor which includes a rotor core.
  • the rotor core is provided with magnetic steel slots and at least two magnetic barrier slots, and the two magnetic barrier slots are relative to the D axis of the rotor core.
  • the two magnetic barrier slots are arranged symmetrically.
  • the two magnetic barrier slots are located between the magnetic steel slot and the radial outer edge of the rotor core, and the magnetic barrier slots are not connected to the radial outer edge.
  • the cross section of the magnetic barrier slot is a rectangular slot, and
  • the extension lines of the long sides of the two rectangular slots facing radially inward form an included angle between 0 and 180°, so that the opening of the included angle faces the center of the rotor core, forming an "inverted V-shaped" magnetic barrier structure. .
  • the magnetic steel groove includes a first magnetic steel groove and a second magnetic steel groove, and the first magnetic steel groove and the second magnetic steel groove are arranged symmetrically with respect to the D axis;
  • the two magnetic barrier grooves include a first magnetic barrier slot and the second magnetic barrier slot, the first magnetic barrier slot is opposite to the first magnetic steel slot and is located between the first magnetic steel slot and the radial outer edge of the rotor core, the second magnetic barrier slot is The steel groove is opposite and located between the second magnetic steel groove and the radial outer edge of the rotor core.
  • the motor rotor further includes magnetic steel, and the magnetic steel is disposed in the magnetic steel slot;
  • the magnetic steel includes a first magnetic steel disposed in the first magnetic steel groove and a second magnetic steel disposed in the second magnetic steel groove. Both the first magnetic steel and the second magnetic steel have a rectangular structure.
  • the first magnetic barrier groove and the second magnetic barrier groove are both rectangular grooves, and the side of the first magnetic barrier groove opposite to the second magnetic barrier groove is the first short side, and the side of the second magnetic barrier groove is the first short side.
  • the side opposite to the first magnetic barrier groove is the second short side.
  • the extension line of the first short side passes through a vertex of the rectangle of the first magnet.
  • the extension line of the second short side passes through a vertex of the rectangle of the second magnet. .
  • the extension line of the first short side passes through a vertex of the rectangle of the first magnet closest to the D axis
  • the extension line of the second short side passes through a vertex of the rectangle of the second magnet closest to the D axis. vertex.
  • both the first magnetic barrier groove and the second magnetic barrier groove are rectangular grooves
  • the side of the first magnetic barrier groove that is farthest from the second magnetic barrier groove is the third short side
  • the second magnetic barrier groove The side farthest from the first magnetic barrier groove is the fourth short side.
  • the extension line of the third short side passes through a long side of the rectangle of the first magnet.
  • the extension line of the fourth short side passes through the second magnet. A long side of a rectangle.
  • the extension line of the third short side passing through the long side of the rectangle of the first magnet is the long side located radially inside
  • the extension line of the fourth short side passing through the long side of the rectangle of the second magnet is The long side located radially inward.
  • the length of the long side of the rectangular magnetic barrier groove ranges from 10 mm to 12 mm; and/or the length of the short side of the rectangular magnetic barrier groove ranges from 1.5 mm to 2 mm.
  • the portion of the first magnetic steel groove located radially outside the first magnetic steel is a first hollow groove structure, and the side of the first hollow groove structure that is connected to the first magnetic steel includes a first arc. and a second arc; the part of the second magnetic steel groove that is located radially outside the second magnetic steel is a second hollow groove structure, and the side of the second hollow groove structure that is connected to the second magnetic steel includes a third circle. arc and the fourth arc.
  • first arc and the second arc are located on the radially outer side of the first hollow groove structure, and the third arc and the fourth arc are located on the radially outer side of the second hollow groove structure. on the edge.
  • one end of the first arc is connected to a vertex of the first magnetic steel, and the other end is extended to be connected to one end of the second arc, and the arc radius of the first arc is R1.
  • the arc radius of the two arcs is R2, and R1 ⁇ R2;
  • One end of the third arc is connected to a vertex of the second magnet, and the other end extends to connect with one end of the fourth arc.
  • the arc radius of the third arc is R1
  • the arc shape of the fourth arc is R1.
  • the radius is R2, and R1 ⁇ R2.
  • R1 ranges from 5mm to 7mm, and R2 ranges from 25mm to 30mm.
  • the first hollow groove structure further includes a first straight line segment, a second straight line segment and a third straight line segment.
  • One end of the first straight line segment is connected to the other end of the second arc and is the second arc.
  • the tangent extension line at the other end of the second straight line segment is connected to the other end of the first straight line segment, and the second straight line segment and the third straight line segment are connected in sequence, and the third straight line segment is connected to the first magnet;
  • the second hollow groove structure also includes a fourth straight line segment, a fifth straight line segment and a sixth straight line segment.
  • One end of the fourth straight line segment is connected to the other end of the fourth arc and is a tangent line at the other end of the fourth arc.
  • the fifth straight line segment is connected to the other end of the fourth straight line segment, and the fifth straight line segment and the sixth straight line segment are connected in sequence, and the sixth straight line segment is connected to the second magnet.
  • connection position between the first arc and the second arc and the center of the rotor core form a first center connection line
  • the connection position between the third arc and the fourth arc is connected with the center of the rotor core.
  • the center connection line of the core forms a second center connection line, and an included angle is formed between the first center connection line and the second center connection line.
  • the present disclosure also provides a motor, which includes a motor stator and the motor rotor of the above embodiment, and the stator is located on the outer periphery of the motor rotor.
  • the motor stator includes stator slots arranged at intervals along the circumferential direction.
  • the two magnetic barrier slots include a first magnetic barrier slot and a second magnetic barrier slot.
  • the first magnetic barrier slot is opposite to the second magnetic barrier slot.
  • the side of is the first short side, and the side of the second magnetic barrier groove opposite to the first magnetic barrier groove is the second short side;
  • a spacing portion is formed between the first short side and the second short side, the slot of the stator slot is opposite to the spacing portion, and the width of the spacing portion is greater than the width of the slot.
  • the portion of the first magnetic steel groove located radially outside the first magnetic steel is a first hollow groove structure, and the edge of the first hollow groove structure connecting with the first magnetic steel includes a first arc and A second arc; the portion of the second magnetic steel groove located radially outside the second magnetic steel is a second hollow groove structure, and the side of the second hollow groove structure that is connected to the second magnetic steel includes a third arc. and the fourth arc,
  • the connecting position of the first arc and the second arc is connected with the center of the rotor core to form a first center connection line
  • the connecting position of the third arc and the fourth arc is connected with the center of the rotor core.
  • the lines form the second center connection line
  • the extension line of the first central connection line passes through the center of the notch of the stator slot opposite to it, and the extension line of the second central connection line passes through the center of the notch of the stator slot opposite to it.
  • the extension line of the first central connection line passes through the center of the notch of the stator slot opposite to it
  • the extension line of the second central connection line passes through the center of the notch of the stator slot opposite to it
  • the first The number of slots spaced along the circumferential direction between the extension line of the center connection and the extension line of the second center connection is Q/(2p)-1, where Q is the total number of slots in the stator and p is the number of pole pairs.
  • the present disclosure also provides an electric vehicle, which includes the motor of the above embodiment.
  • Figure 1 is a schematic diagram 1 of the motor rotor structure of the present disclosure
  • Figure 2 is a schematic diagram 2 of the motor rotor structure of the present disclosure
  • Figure 3 is a schematic diagram 3 of the motor rotor structure of the present disclosure
  • FIG. 4 is a schematic diagram 1 of the motor of the present disclosure
  • Figure 5 is a load magnetic field line diagram of the motor of the present disclosure
  • Figure 6 shows the peak electromagnetic force results of the motor of the present disclosure
  • Figure 7 is a torque pulsation effect diagram of the motor of the present disclosure.
  • Figure 8 is a noise simulation rendering of the motor of the present disclosure.
  • Rotor core 11. Magnetic steel; 111. First magnetic steel; 112. Second magnetic steel; 12. Magnetic steel groove; 121. First magnetic steel groove; 1211. First hollow groove structure; 122. No. Two magnetic steel grooves; 1221, second hollow groove structure; 21, magnetic barrier groove; 211, first magnetic barrier groove; 2111, first short side; 2112, third short side; 2113, first long side; 212.
  • the rotor of the permanent magnet synchronous motor has a permanent magnet structure, its magnetic density cannot be changed, which makes the electromagnetic excitation force of the motor large, resulting in loud vibration and noise of the motor.
  • the electromagnetic excitation force is an intrinsic characteristic of the motor.
  • the commonly used method is to modify the rotor or stator. The shape of the modification will directly affect the result of the electromagnetic force. Complex modification will cause the rotor production process to change. difficulty.
  • the technical problem to be solved by the present disclosure is to overcome the existing defects of large torque ripple and high electromagnetic excitation force in the existing vehicle motors under multiple working conditions, which cannot be solved at the same time, thereby providing a motor rotor, a motor and a electric car.
  • the motor rotor, motor and electric vehicle provided by the present disclosure have the following beneficial effects:
  • This disclosure uses a magnetic barrier slot located radially outside the magnetic steel slot on the rotor core and not connected with the radial outer edge of the rotor core, and the cross-section of the magnetic barrier slot is a rectangular slot, and the two rectangular slots An angle between 0 and 180° can be interposed between the extension lines of the long sides facing radially inward, so that the opening of the angle formed between the extension lines of the two radially inner long sides faces the rotor core. center, forming an "reverse V-shaped" magnetic barrier structure, thereby effectively distributing the "reverse V-shaped” magnetic barrier structure at the end of the d-axis of the rotor, which can effectively reduce the electromagnetic excitation force and vibration of the motor without affecting the output performance of the motor.
  • the present disclosure also forms an effective progressive magnetic barrier structure at the end of the magnetic steel channel by arranging a structure including at least two arc sections on the edge of the hollow channel structure located radially outside the magnetic steel channel. At the same time, the electromagnetic vibration force and torque ripple of the motor are reduced, thereby reducing the motor noise.
  • the present disclosure also connects the connecting point of two arc sections of one magnetic steel slot with the center of the rotor through the center of the stator slot, and connects the connecting point of two arc sections of another magnetic steel slot with the rotor through the center of the stator slot.
  • the center line passes through the center of the stator slot, and the number of circumferential spacing slots between the two centers is Q/(2p)-1, which can make the magnetic lines of force entering the rotor from two adjacent stator teeth have a uniform transition and reduce
  • the change of electromagnetic force can effectively form the magnetic barrier structure of the rotor pole arc, and can also reduce the electromagnetic excitation force and torque pulsation of the motor without affecting the output performance of the motor, thereby reducing motor noise.
  • the present disclosure provides a rotor structure that can simultaneously reduce torque ripple and excitation force.
  • the present disclosure provides a motor rotor, which includes: a rotor core 10.
  • the rotor core 10 is provided with magnetic steel slots 12 and at least two magnetic barrier slots 21, and the two magnetic barrier slots are 21 is arranged symmetrically with respect to the D axis of the rotor core 10.
  • the two magnetic barrier slots 21 are located between the magnetic steel slots 12 and the radial outer edge of the rotor core 10, and the magnetic barrier slots 21 are not in contact with the radial outer edge.
  • the cross-section of the magnetic barrier groove 21 is a rectangular groove, and the extension lines of the long sides of the two rectangular grooves facing the radially inward form an included angle between 0 and 180°, so that the two radially inward
  • the opening of the angle formed between the extension lines of the long sides faces the center of the rotor core 10, forming an "inverted V-shaped" magnetic barrier structure.
  • the present disclosure uses a magnetic barrier slot located radially outside the magnetic steel slot on the rotor core and not connected with the radial outer edge of the rotor core, and the cross section of the magnetic barrier slot is a rectangular slot, and the orientation of the two rectangular slots
  • An angle between 0 and 180° can be set between the extension lines of the radially inner long sides, so that the opening of the angle formed between the extension lines of the two radially inner long sides faces the center of the rotor core,
  • An "inverse V-shaped" magnetic barrier structure is formed, thereby effectively distributing the "reverse V-shaped" magnetic barrier structure at the end of the d-axis of the rotor, which can effectively reduce the electromagnetic excitation force and torque of the motor without affecting the output performance of the motor. pulsation, thereby reducing motor noise.
  • the motor vibrates and makes loud noise.
  • Figure 5 is a load magnetic field line diagram using the motor of the present disclosure.
  • the magnetic field lines in the figure are evenly distributed;
  • Figure 6 is the peak electromagnetic force result of using the motor of the present disclosure.
  • the peak electromagnetic force at 48 times the frequency is reduced by more than 90%; the torque under peak operating conditions The pulsation is reduced to 1.1%.
  • Figure 7 is a torque pulsation effect diagram of the present disclosure, and the peak torque pulsation is reduced to 1.1%.
  • Figure 8 is a noise simulation effect diagram, and the noise caused by electromagnetic force and torque pulsation is greatly reduced.
  • the magnetic steel groove 12 includes a first magnetic steel groove 121 and a second magnetic steel groove 122.
  • the first magnetic steel groove 121 and the second magnetic steel groove 122 are arranged symmetrically with respect to the D axis;
  • two magnetic barrier grooves 21 includes a first magnetic barrier groove 211 and a second magnetic barrier groove 212.
  • the first magnetic barrier groove 211 is opposite to the first magnetic steel groove 121 and is located between the first magnetic steel groove 121 and the radial outer edge of the rotor core 10 position
  • the second magnetic barrier groove 212 is opposite to the second magnetic steel groove 122 and is located between the second magnetic steel groove 122 and the radial outer edge of the rotor core 10 .
  • the position can further optimize the path of the motor's magnetic field lines, thereby optimizing the motor vibration.
  • it also includes magnetic steel 11 (preferably a permanent magnet), and the magnetic steel 11 is disposed in the magnetic steel slot 12;
  • the magnetic steel 11 includes a first magnetic steel 111 disposed in the first magnetic steel groove 121 and a second magnetic steel 112 disposed in the second magnetic steel groove 122. Both the first magnetic steel 111 and the second magnetic steel 112 are rectangular. structure.
  • a preferred arrangement of magnetic lines of force can be formed through the magnetic steel, the first magnet disposed in the first magnetic steel slot, and the second magnet disposed in the second magnetic steel slot.
  • the rectangular structure of the magnet can optimize the magnetic field line distribution of the present disclosure, thereby further reducing the electromagnetic excitation force and torque pulsation of the motor.
  • both the first magnetic barrier groove 211 and the second magnetic barrier groove 212 are rectangular grooves, and the side of the first magnetic barrier groove 211 opposite to the second magnetic barrier groove 212 is the first short side 2111.
  • the side of the second magnetic barrier groove 212 opposite to the first magnetic barrier groove 211 is the second short side 2121.
  • the extension line of the first short side 2111 passes through a vertex of the rectangle of the first magnet 111, and the extension of the second short side 2121 The line passes through one vertex of the rectangle of the second magnet 112 .
  • the present disclosure can further optimize the path of the motor's magnetic field lines through such an arrangement relationship.
  • the rectangular magnetic barrier slot can have the best effect of reducing electromagnetic excitation force and torque pulsation, and can further optimize the motor vibration.
  • the extension line of the first short side 2111 passes through a vertex of the rectangle of the first magnet 111 closest to the D axis
  • the extension line of the second short side 2121 passes through the closest vertex of the rectangle of the second magnet 112 A vertex on the D axis.
  • both the first magnetic barrier groove 211 and the second magnetic barrier groove 212 are rectangular grooves, and the side of the first magnetic barrier groove 211 that is farthest from the second magnetic barrier groove 212 is the third short side 2112.
  • the side of the second magnetic barrier slot 212 that is farthest from the first magnetic barrier slot 211 is the fourth short side 2122.
  • the extension line of the third short side 2112 passes through a long side of the rectangle of the first magnet 111.
  • the fourth short side The extension line of the side 2122 passes through one long side of the rectangle of the second magnet 112 .
  • the present disclosure can further optimize the path of the motor's magnetic field lines through such an arrangement relationship.
  • the rectangular magnetic barrier slot can have the best effect of reducing electromagnetic excitation force and torque pulsation, and can further optimize the motor vibration.
  • the extended line of the long side of the rectangular magnetic barrier of the present disclosure passes through the outer vertex of the magnetic steel, and the extended line of the short side of the magnetic barrier passes through the inner vertex of the magnetic steel.
  • the extension line of the third short side 2112 passes through the long side of the rectangle of the first magnet 111 and is the long side located radially inside
  • the extension line of the fourth short side 2122 passes through the rectangle of the second magnet 112
  • the long side of is the long side located radially inside.
  • the length of the long side of the rectangular magnetic barrier groove 21 ranges from 10 mm to 12 mm; the length of the short side of the rectangular magnetic barrier groove 21 ranges from 1.5 mm to 2 mm.
  • the disclosed magnetic barrier is used to change the path of magnetic lines of force, so it needs to have a certain length and width, neither too small nor too large.
  • the optimal effect of reducing electromagnetic excitation force and torque pulsation is within the range of 10mm-12mm.
  • the portion of the first magnetic steel groove 121 located radially outside the first magnetic steel 111 is the first hollow groove structure 1211 , and the edge of the first hollow groove structure 1211 that is in contact with the first magnetic steel 111 It includes a first arc 41 and a second arc 42; the part of the second magnetic steel groove 122 located radially outside the second magnet 112 is the second hollow groove structure 1221, and the second hollow groove structure 1221 is the same as the second hollow groove structure 1221.
  • the side where the two magnets 112 connect includes a third arc 41' and a fourth arc 42'.
  • the present disclosure also forms an effective progressive magnetic barrier structure at the end of the magnetic steel channel by arranging a structure including at least two arc sections on the edge of the hollow channel structure located radially outside the magnetic steel channel. At the same time, the electromagnetic vibration force and torque ripple of the motor are reduced, thereby reducing the motor noise.
  • the first arc 41 and the second arc 42 are located on the radially outer edge of the first hollow groove structure 1211, and the third arc 41' and the fourth arc 42' are located on the second On the radially outer edge of the hollow groove structure 1221.
  • the rectangular magnetic barrier slot can further improve the effect of reducing the electromagnetic excitation force and torque pulsation, and can further optimize the motor vibration.
  • one end of the first arc 41 is connected to a vertex of the first magnetic steel 111 , and the other end is extended to be connected to one end of the second arc 42 , and the arc radius of the first arc 41 is is R1, the arc radius of the second arc 42 is R2, and R1 ⁇ R2;
  • One end of the third arc 41' is connected to a vertex of the second magnet 112, and the other end extends to connect with one end of the fourth arc 42', and the arc radius of the third arc 41' is R1.
  • the arc radius of the fourth arc 42' is R2, and R1 ⁇ R2.
  • the torque fluctuation can be optimized and the harmonics can be reduced; further, the rectangular magnetic barrier slot has a better effect of reducing the electromagnetic excitation force and torque pulsation, and can further optimize the motor vibration.
  • R1 ranges from 5mm to 7mm, and R2 ranges from 25mm to 30mm.
  • the first hollow groove structure 1211 also includes a first straight line segment 44 , a second straight line segment 45 and a third straight line segment 46 , one end of the first straight line segment 44 is connected to the other end of the second arc 42 And is the tangent extension line at the other end of the second arc 42, the second straight line segment 45 is connected to the other end of the first straight line segment 44, and the second straight line segment 45 and the third straight line segment 46 are connected in sequence, and the third straight line segment 45 is connected to the other end of the first straight line segment 44.
  • the straight section 46 is connected to the first magnet 111;
  • the second hollow groove structure 1221 also includes a fourth straight line segment 44', a fifth straight line segment 45' and a sixth straight line segment 46'.
  • One end of the fourth straight line segment 44' is connected to the other end of the fourth arc 42'. is the tangent extension line at the other end of the fourth arc 42', the fifth straight line segment 45' is connected to the other end of the fourth straight line segment 44', and the fifth straight line segment 45' and the sixth straight line segment 46' are in sequence. Then, the sixth straight line segment 46' is connected with the second magnet 112.
  • the effect of the magnetic steel groove in reducing the electromagnetic excitation force and torque pulsation can be further improved, and the motor vibration can be further optimized.
  • the connecting position of the first arc 41 and the second arc 42 and the center of the rotor core 10 form a first center connection 43
  • the third arc 41 ′ and the fourth arc 42 ''s contact position and the center line of the rotor core 10 form a second center line 43'
  • an included angle 49 is formed between the first center line 43 and the second center line 43'.
  • Figure 5 is a load magnetic field line diagram using the motor of the present disclosure.
  • the magnetic field lines in the figure are evenly distributed;
  • Figure 6 is the peak electromagnetic force result of using the motor of the present disclosure.
  • the peak electromagnetic force at 48 times the frequency is reduced by more than 90%; the torque under peak operating conditions The pulsation is reduced to 1.1%.
  • Figure 7 is a torque pulsation effect diagram of the present disclosure, and the peak torque pulsation is reduced to 1.1%.
  • Figure 8 is a noise simulation effect diagram, and the noise caused by electromagnetic force and torque pulsation is greatly reduced.
  • the present disclosure also provides a motor, which includes a motor stator and the motor rotor of the above embodiment, and the motor stator is located on the outer periphery of the motor rotor.
  • the motor stator 5 includes stator slots 51 arranged at intervals along the circumferential direction.
  • the two magnetic barrier slots 21 include a first magnetic barrier slot 211 and a second magnetic barrier slot 212 .
  • the first magnetic barrier slot 211 and The opposite side of the second magnetic barrier groove 212 is the first short side 2111, and the opposite side of the second magnetic barrier groove 212 to the first magnetic barrier groove 211 is the second short side 2121;
  • a spacing portion 25 is formed between the first short side 2111 and the second short side 2121 .
  • the notch 52 of the stator slot 51 is opposite to the spacing portion 25 , and the width of the spacing portion 25 is greater than the width of the notch 52 .
  • the portion of the first magnetic steel groove 121 located radially outside the first magnetic steel 111 is the first hollow groove structure 1211, and the side where the first hollow groove structure 1211 connects with the first magnetic steel 111 includes The first arc 41 and the second arc 42; the part of the second magnetic steel groove 122 located radially outside the second magnetic steel 112 is the second hollow groove structure 1221, and the second hollow groove structure 1221 is connected to the second magnetic steel groove 122.
  • the connecting sides of the steel 112 include the third arc 41' and the fourth arc 42',
  • the connecting position of the first arc 41 and the second arc 42 and the center of the rotor core 10 form the first center connecting line 43, and the connecting position of the third arc 41' and the fourth arc 42'
  • the second center connection line 43' is formed with the center line of the rotor core 10;
  • the extension line of the first central connection line 43 passes through the center of the notch 52 of the stator slot 51 opposite to it, and the extension line of the second central connection line 43' passes through the center of the notch 52 of the stator slot 51 opposite to it.
  • the extension line of the first central connection line 43 passes through the center of the notch 52 of the stator slot 51 opposite to it, and the extension line of the second central connection line 43' passes through the notch of the stator slot 51 opposite to it.
  • the number of slots separated in the circumferential direction between the extension line of the first center connection line 43 and the extension line of the second center connection line 43' is Q/(2p)-1, where Q is the total number of slots in the stator.
  • p is a polar logarithm.
  • the present disclosure also connects the connecting point of two arc sections of one magnetic steel slot with the rotor center through the center of the stator slot, and connects the connecting point of two arc sections of another magnetic steel slot symmetrically with the rotor center.
  • the line passes through the center of the stator slot, and the number of circumferential spacing slots between the two centers is Q/(2p)-1, which can effectively make the connection point of the two arcs at the center of the stator slot, and can make the connection between two adjacent arcs
  • the magnetic lines of force entering the rotor from each stator tooth have a uniform transition, which reduces the change of electromagnetic force and forms a magnetic barrier structure of the rotor pole arc. It can also reduce the electromagnetic excitation force and torque pulsation of the motor without affecting the output performance of the motor. Thereby reducing motor noise.
  • the present disclosure also provides an electric vehicle, which includes the motor of the above embodiment.

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

Abstract

La présente invention fournit un rotor de moteur, un moteur et un véhicule électrique. Le rotor de moteur comprend : un noyau de rotor, doté de rainures d'acier magnétique et d'au moins deux rainures de barrière magnétique. Les deux rainures de barrière magnétique sont agencées symétriquement par rapport à un axe D du noyau de rotor ; les deux rainures de barrière magnétique sont situées au niveau de positions entre les rainures d'acier magnétique et le bord externe radial du noyau de rotor ; les rainures de barrière magnétique ne sont pas reliées au bord externe radial ; la section transversale de chaque rainure de barrière magnétique est une rainure rectangulaire ; un angle inclus allant de 0° à 180° est formé entre les lignes d'extension des bords longs, faisant face au côté interne radial, des deux rainures rectangulaires, de sorte que l'ouverture de l'angle inclus fait face au centre du noyau de rotor pour former une structure de barrière magnétique en forme de V inversé. Dans la présente invention, la structure de barrière magnétique en forme de V inversé peut être efficacement distribuée au niveau de l'extrémité de queue de l'axe D du rotor, de sorte qu'une force d'excitation électromagnétique et une ondulation de couple du moteur peuvent être efficacement réduites tandis que la performance de sortie du moteur n'est pas affectée, et le bruit du moteur est ainsi réduit.
PCT/CN2022/140703 2022-06-17 2022-12-21 Rotor de moteur, moteur et véhicule électrique WO2023240970A1 (fr)

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CN115001178A (zh) * 2022-06-17 2022-09-02 珠海格力电器股份有限公司 电机转子、电机和电动汽车
CN116191726A (zh) * 2022-10-14 2023-05-30 广东美芝制冷设备有限公司 具有磁障的电机转子、电机及压缩机

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US20070247015A1 (en) * 2006-04-25 2007-10-25 A. O. Smith Corporation Rotor having lobed bore and method of assembling same
CN207117335U (zh) * 2017-08-24 2018-03-16 智车优行科技（上海）有限公司 内置式永磁电机转子和永磁电机
CN208028677U (zh) * 2018-03-29 2018-10-30 广东美芝制冷设备有限公司 转子铁芯、电机、压缩机及制冷设备
CN113315283A (zh) * 2021-05-27 2021-08-27 珠海格力电器股份有限公司 转子、电机、汽车
CN214506702U (zh) * 2021-04-30 2021-10-26 美的威灵电机技术（上海）有限公司 转子、电机及压缩机
CN115001178A (zh) * 2022-06-17 2022-09-02 珠海格力电器股份有限公司 电机转子、电机和电动汽车

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US20070247015A1 (en) * 2006-04-25 2007-10-25 A. O. Smith Corporation Rotor having lobed bore and method of assembling same
CN207117335U (zh) * 2017-08-24 2018-03-16 智车优行科技（上海）有限公司 内置式永磁电机转子和永磁电机
CN208028677U (zh) * 2018-03-29 2018-10-30 广东美芝制冷设备有限公司 转子铁芯、电机、压缩机及制冷设备
CN214506702U (zh) * 2021-04-30 2021-10-26 美的威灵电机技术（上海）有限公司 转子、电机及压缩机
CN113315283A (zh) * 2021-05-27 2021-08-27 珠海格力电器股份有限公司 转子、电机、汽车
CN115001178A (zh) * 2022-06-17 2022-09-02 珠海格力电器股份有限公司 电机转子、电机和电动汽车

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