WO2024078131A1 - Rotor ayant des barrières magnétiques, moteur et compresseur - Google Patents

Rotor ayant des barrières magnétiques, moteur et compresseur Download PDF

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Publication number
WO2024078131A1
WO2024078131A1 PCT/CN2023/113613 CN2023113613W WO2024078131A1 WO 2024078131 A1 WO2024078131 A1 WO 2024078131A1 CN 2023113613 W CN2023113613 W CN 2023113613W WO 2024078131 A1 WO2024078131 A1 WO 2024078131A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
rotor
magnetic barrier
motor
curved
Prior art date
Application number
PCT/CN2023/113613
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English (en)
Chinese (zh)
Inventor
邱小华
杨向宇
朱晓光
李宏涛
Original Assignee
广东美芝制冷设备有限公司
华南理工大学
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Application filed by 广东美芝制冷设备有限公司, 华南理工大学 filed Critical 广东美芝制冷设备有限公司
Publication of WO2024078131A1 publication Critical patent/WO2024078131A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/246—Variable reluctance rotors
    • 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 application relates to the technical field of motors, and in particular to a rotor, a motor and a compressor with a magnetic barrier.
  • a permanent magnet synchronous motor is a motor that places a layer of permanent magnets on the inside of the rotor and mainly uses permanent magnet torque and reluctance torque as an auxiliary.
  • the motor performance is mainly improved by improving the performance of permanent magnets, that is, by increasing the value of output torque by increasing the permanent magnet torque, thereby improving the motor efficiency.
  • a common practice is to build in rare earth permanent magnets.
  • rare earths are non-renewable resources and are expensive, the wider application of this type of motor is limited.
  • simply improving the performance of permanent magnets to improve motor performance cannot meet the urgent need to further improve motor efficiency.
  • most current motors use a structure with two or more layers of permanent magnets, which results in high motor cost and weak anti-demagnetization ability.
  • a multi-layer permanent magnet structure is used, which affects the motor production rhythm and affects the performance of the motor rotor.
  • the main purpose of this application is to propose a rotor with magnetic barriers.
  • the present application proposes a rotor with magnetic barriers, wherein the rotor with magnetic barriers comprises a rotor core, a plurality of curved grooves and a plurality of magnetic barrier groups; the plurality of curved grooves are arranged on the rotor core and are arranged at intervals along the circumferential direction of the rotor core, and the two ends of the curved grooves extend toward the edge of the rotor core; the plurality of magnetic barrier groups are arranged on the side of the plurality of curved grooves away from the center of the rotor core, and the magnetic barrier group comprises at least one layer of magnetic barrier holes arranged at intervals along the d-axis direction of the motor rotor with magnetic barriers, the number of the magnetic barrier holes in one layer is set to n, and the n magnetic barrier holes are arranged at intervals along the extension direction of the groove wall of the curved groove; a direct-axis magnetic conductive channel is formed between any two adjacent magnetic barrier holes in a layer, the width of the direct-axis magnetic
  • the curved groove has a first side wall and a second side wall arranged opposite to each other.
  • the second side walls are all convexly arranged toward the center of the rotor core.
  • the rotor with magnetic barriers further includes a plurality of permanent magnets, and the plurality of permanent magnets are installed in the plurality of curved slots.
  • the thickness of the permanent magnet in the d-axis direction of the rotor with a magnetic barrier is T
  • the magnetic barrier hole has a first side and a second side that are relatively arranged, the second side is located on the side of the first side away from the center of the rotor core, and the distance from the first side to the second side is the thickness H of the magnetic barrier hole, satisfying T>H.
  • the thickness of the middle portion of the permanent magnet is greater than the thickness of both ends of the permanent magnet.
  • the curved groove is arranged in a U shape.
  • the curved groove is arranged in a V-shape.
  • the curved groove is arranged in an arc shape.
  • the present application also proposes a motor, which includes the rotor with magnetic barriers and a stator sleeved on the outside of the rotor with magnetic barriers, wherein the stator includes a stator core and windings wound on stator teeth.
  • the rotor with magnetic barriers comprises a rotor core, a plurality of curved grooves and a plurality of magnetic barrier groups; the plurality of curved grooves are arranged on the rotor core and are arranged at intervals along the circumferential direction of the rotor core, and the two ends of the curved grooves extend toward the edge of the rotor core; the plurality of magnetic barrier groups are arranged on the side of the plurality of curved grooves away from the center of the rotor core, and the magnetic barrier group comprises at least one layer of magnetic barrier holes arranged at intervals along the d-axis direction of the motor rotor with magnetic barriers, the number of the magnetic barrier holes in one layer is set to n, and the n magnetic barrier holes are arranged at
  • the thickness of the rotor having the magnetic barrier along the axial direction thereof is not less than the thickness of the stator along the axial direction thereof.
  • the present application also proposes a compressor, the compressor comprising a motor, the motor comprising the rotor with magnetic barriers, and a stator sleeved outside the rotor with magnetic barriers, the stator comprising a stator core and a winding wound on stator teeth.
  • the rotor with magnetic barriers comprises a rotor core, a plurality of curved grooves and a plurality of magnetic barrier groups; the plurality of curved grooves are arranged in the rotor core and spaced apart along the circumference of the rotor core, and the two ends of the curved grooves face The edge of the rotor core extends; a plurality of magnetic barrier groups are arranged on one side of the plurality of curved slots away from the center of the rotor core, the magnetic barrier group includes at least one layer of magnetic barrier holes arranged at intervals along the d-axis direction of the motor rotor with magnetic barriers, the number of magnetic barrier holes in a layer is set to n, and the n magnetic barrier holes are arranged at intervals along the extension direction of the slot wall of the curved slot; a direct-axis magnetic conductive channel is formed between any two adjacent magnetic barrier holes in a layer, the width of the direct-axis magnetic conductive channel is d, and the distance between the two ends of a layer of magnetic barrier
  • the rotor with magnetic barriers of the present application comprises a rotor core, a plurality of curved grooves and a plurality of magnetic barrier groups; the plurality of curved grooves are arranged on the rotor core and are arranged at intervals along the circumferential direction of the rotor core, and the two ends of the curved grooves extend toward the edge of the rotor core; the plurality of magnetic barrier groups are arranged on the side of the plurality of curved grooves away from the center of the rotor core, and the magnetic barrier group comprises at least one layer of magnetic barrier holes arranged at intervals along the d-axis direction of the motor rotor with magnetic barriers, the number of magnetic barrier holes in one layer is set to n, and the n magnetic barrier holes are arranged at intervals along the extension direction of the groove wall of the curved groove; a direct-axis magnetic conductive channel is formed between any two adjacent magnetic barrier holes in a layer, the width of the direct-axis magnetic conductive channel is d, and the distance between the two
  • FIG1 is a schematic structural diagram of an embodiment of a rotor with a magnetic barrier according to the present application.
  • FIG2 is an enlarged view of point A in FIG1 ;
  • FIG3 is an enlarged view of point A in FIG1 ;
  • FIG4 is a schematic structural diagram of the rotor with magnetic barriers in FIG1 ;
  • FIG5 is a schematic structural diagram of another embodiment of a rotor with a magnetic barrier according to the present application.
  • FIG6 is a schematic diagram showing the relationship between the output torque of the motor of the present application and the change in the (n-1)d/D range.
  • the present application proposes an embodiment of a rotor with a magnetic barrier, namely, a motor rotor of a permanent magnet assisted synchronous reluctance motor, which is mainly used in air-conditioning compressors, electric vehicles and fan systems.
  • the synchronous reluctance motor has multiple layers of rotor magnetic barriers and works by relying on the reluctance torque generated by the asymmetry of the rotor magnetic circuit.
  • This motor has the advantages of low cost, simple manufacturing and low rotor loss, but has the disadvantages of low power factor and torque density and large torque pulsation.
  • a certain low-performance permanent magnet (ferrite or bonded NdFeB) can be inserted into the rotor magnetic barrier to assist in excitation, so as to reduce the excitation component of the motor current and generate permanent magnet torque.
  • This is the permanent magnet assisted synchronous reluctance motor.
  • T is the output torque of the motor. Increasing the value of T can improve the performance of the motor.
  • the first term in the equation after T is the reluctance torque, and the second term is the permanent magnet torque.
  • ⁇ PM is the maximum value of the stator-rotor coupling flux generated by the permanent magnet of the motor
  • m is the number of phases of the stator conductor
  • Ld and Lq are the d-axis and q-axis inductances, respectively, where the d-axis refers to the axis coinciding with the main magnetic pole axis, and the q-axis refers to the axis perpendicular to the main magnetic pole axis, where perpendicular refers to the electrical angle;
  • id and iq are the components of the armature current in the d-axis and q-axis directions, respectively.
  • increasing the difference between the inductances of Ld and Lq and ⁇ pm can increase the output torque, that is, while ensuring that one of the reluctance torque and the permanent magnet torque remains unchanged, increasing the other of the two can increase the total output torque of the motor, thereby improving the efficiency of the motor.
  • the motor performance is mainly improved by improving the performance of permanent magnets, that is, by increasing the value of output torque by increasing the permanent magnet torque, thereby improving the motor efficiency.
  • a common practice is to build in rare earth permanent magnets.
  • rare earths are non-renewable resources and are expensive, the wider application of this type of motor is limited.
  • simply improving the performance of permanent magnets to improve motor performance cannot meet the urgent need to further improve motor efficiency.
  • most current motors use a structure with two or more layers of permanent magnets, which results in high motor cost and weak anti-demagnetization ability.
  • a multi-layer permanent magnet structure is used, which affects the motor production rhythm and affects the performance of the motor rotor.
  • the rotor 10 with magnetic barriers includes a rotor core 100, a plurality of curved grooves 200, and a plurality of magnetic barrier groups 300.
  • the plurality of curved grooves 200 are arranged on the rotor core 100 and are arranged at intervals along the circumference of the rotor core 100. Both ends of the curved grooves 200 extend toward the edge of the rotor core 100.
  • the plurality of magnetic barrier groups 300 are arranged on one side of the plurality of curved grooves 200 away from the center of the rotor core 100.
  • the magnetic barrier groups 300 include a plurality of curved grooves 200 arranged along the circumference of the rotor core 100.
  • the motor rotor 100 having a magnetic barrier has at least one layer of magnetic barrier holes 310 arranged in an axial direction at intervals, the number of the magnetic barrier holes 310 in a layer is set to n, and the n magnetic barrier holes 310 are arranged in an extension direction of the slot wall of the curved slot 200 at intervals; a direct-axis magnetic conductive channel 400 is formed between any two adjacent magnetic barrier holes 310 in a layer, the width of the direct-axis magnetic conductive channel 400 is d, and the distance between the two ends of the magnetic barrier holes 310 in a layer is D, satisfying 1/6 ⁇ (n-1)d/D ⁇ 4/3.
  • the motor rotor includes a rotor core 100 and a permanent magnet 500.
  • the rotor core 100 is formed by stacking silicon steel sheets and has a certain stack height.
  • the rotor core 100 is driven by the magnetic effect of the permanent magnet 500, and the motor rotor can rotate relative to the motor stator to achieve normal operation of the motor.
  • the rotor core 100 is formed by stacking high magnetic permeability materials or silicon steel punchings. It is made of high magnetic permeability materials or silicon steel punchings, has high magnetic flux, high structural strength, and is easy to process.
  • a plurality of curved grooves 200 are provided on the rotor core 100.
  • the curved grooves 200 are arranged in a curved shape.
  • the curved grooves 200 may have one curved portion or may have multiple curved portions, and there is no specific limitation on this. When the curved grooves 200 have multiple curved portions, their shape is generally arranged in a wave shape.
  • the plurality of curved grooves 200 are arranged at intervals along the circumference of the rotor core 100, and are specifically evenly distributed along the circumference with the center of the rotor core 100 as the center of the circle.
  • the two ends of the curved grooves 200 extend toward the edge of the rotor core 100, and form an area for the arrangement of the plurality of magnetic barrier groups 300 between the edges of the rotor core 100.
  • the plurality of magnetic barrier groups 300 are arranged on the side of the plurality of curved grooves 200 away from the center of the circle of the rotor core 100.
  • the curved groove 200 is mainly used to install the permanent magnet 500, and the permanent magnet 500 has a magnetic pole, so the number of the curved grooves 200 is set to an even number.
  • 6 curved grooves 200 are arranged at intervals along the circumferential direction of the rotor core 100, and at least one permanent magnet 500 is placed in each curved groove 200.
  • the polarities of the permanent magnets 500 in any two adjacent curved grooves 200 are opposite, and multiple permanent magnets 500 are distributed alternately according to N poles and S poles along the circumferential direction of the rotor core 100.
  • the plurality of curved grooves 200 are arranged as a single-layer structure.
  • the permanent magnets 500 are placed in the curved grooves 200 with a single-layer structure, so that the thickness of the permanent magnets 500 can be increased within a limited volume, thereby improving the anti-demagnetization ability of the permanent magnets 500 and improving the reliability of the motor.
  • the production efficiency of the motor rotor with a single-layer curved groove 200 structure is also higher.
  • the number of permanent magnets 500 required to be placed in the curved grooves 200 with a single-layer structure is relatively reduced, and the overall usage of the permanent magnets 500 is reduced, so the production cost of the rotor can be further reduced, thereby reducing the production cost of the motor.
  • the magnetic barrier group 300 includes at least one layer of magnetic barrier holes 310 arranged at intervals along the extension direction of the slot wall of the curved slot 200.
  • the number of magnetic barrier holes 310 in one layer is set to n, and the magnetic barrier holes 310 can be filled with air or other non-magnetic conductive materials.
  • the slot wall of the curved slot 200 can be a first side wall 210 close to the edge of the rotor core 100, or a second side wall 220 close to the center of the rotor core 100.
  • the extension directions of the first side wall 210 and the second side wall 220 can be the same or different.
  • the extension directions of the first side wall 210 and the second side wall 220 are substantially the same, so the plurality of magnetic barrier holes 310 are arranged at intervals along the extension direction of the first side wall 210 of the curved slot 200 or along the extension direction of the second side wall 220 of the curved slot 200.
  • a direct-axis magnetic channel 400 is formed between two adjacent magnetic barrier holes 310.
  • the magnetic resistance in the d-axis direction where the direct-axis magnetic channel 400 is located is small, with high magnetic flux and large inductance Ld; and the magnetic resistance in the q-axis direction at the center line of the magnetic barrier hole 310 is very high, and the inductance Lq is small, which can increase the inductance difference between the d-axis and q-axis directions, thereby improving the torque output capacity of the motor.
  • the magnetic barrier hole 310 is arranged between the first side wall 210 of the curved slot 200 and the edge of the rotor core 100, which can reduce the impact on the permanent magnetic force, and at the same time regulate the path of the magnetic line of force, weaken the magnetic field harmonics in the air gap, and alleviate the degree of magnetic saturation.
  • a magnetic barrier is formed during the rotation of the motor rotor to improve the power density and torque density of the motor, improve the overload capacity of the motor, and effectively improve the torque pulsation of the motor.
  • the motor performance is greatly improved, and the product competitiveness is improved.
  • a direct-axis magnetic conductive channel 400 is formed between any two adjacent magnetic barrier holes 310 in a layer of the magnetic barrier holes 310. Therefore, the number of the direct-axis magnetic conductive channels 400 is n-1.
  • the magnetic resistance in the d-axis direction where the direct-axis magnetic conductive channel 400 is located is small, has a high magnetic flux, and has a large inductance Ld; while the magnetic resistance in the q-axis direction at the center line of the magnetic barrier hole 310 is very high, and the inductance Lq is small.
  • the surface of the magnetic conductive channel can be coated with a magnetic conductive material, so as to achieve a better magnetic conductive effect.
  • the rotor 10 with magnetic barriers of the present application comprises a rotor core 100, a plurality of curved grooves 200 and a plurality of magnetic barrier groups 300; the plurality of curved grooves 200 are arranged on the rotor core 100 and are arranged at intervals along the circumference of the rotor core 100, and the two ends of the curved grooves 200 extend toward the edge of the rotor core 100; the plurality of magnetic barrier groups 300 are arranged on one side of the plurality of curved grooves 200 away from the center of the rotor core 100, and the magnetic barrier groups 300 include magnetic barriers along the motor rotor with magnetic barriers.
  • At least one layer of magnetic barrier holes 310 is arranged in a spaced-apart manner in the d-axis direction of the sub-slot 10, and the number of the magnetic barrier holes 310 in one layer is set to n, and the n magnetic barrier holes 310 are arranged in a spaced-apart manner along the extension direction of the slot wall of the curved slot 200; a direct-axis magnetic conductive channel 400 is formed between any two adjacent magnetic barrier holes 310 in one layer of the magnetic barrier holes 310, and the width of the direct-axis magnetic conductive channel 400 is d, and the distance between the two ends of one layer of the magnetic barrier holes 310 is D, which satisfies 1/6 ⁇ (n-1)d/D ⁇ 4/3.
  • the q-axis inductance of the motor rotor is increased, and the inductance difference between the d-axis and q-axis of the motor can be increased, which is more conducive to improving the magnetic resistance torque of the motor, so that a unit current generates a larger electromagnetic torque, thereby improving the efficiency of the motor.
  • the amount of permanent magnets 500 placed in the curved groove 200 of the single-layer structure is reduced compared to the amount of permanent magnets 500 of the double-layer structure, thereby reducing the production cost of the motor rotor.
  • the production efficiency of the motor rotor of the single-layer curved groove 200 structure is also higher than that of the motor rotor of the double-layer curved groove 200 structure.
  • the curved groove 200 has a first side wall 210 and a second side wall 220 which are arranged opposite to each other. Both the first side wall 210 and the second side wall 220 are convexly arranged toward the center of the rotor core 100. Specifically, the curved groove 200 has a first side wall 210 and a second side wall 220 which are arranged opposite to each other. The first side wall 210 is arranged close to the center of the rotor core 100, and the second side wall 220 is arranged away from the center of the rotor core 100.
  • the magnetic barrier group 300 includes at least one layer of magnetic barrier holes 310 arranged at intervals along the circumferential direction of the rotor core 100, and the number of magnetic barrier holes 310 in one layer is set to be multiple, the arrangement of the multiple magnetic barrier holes 310 needs to have a certain spatial position, and the second side wall 220 is arranged toward the edge of the rotor core 100. In this way, the second side wall 220 can be arranged to be closer to the center of the rotor core 100.
  • An area is formed between the wall 220 and the edge of the rotor core 100, and the multiple magnetic barrier groups 300 are arranged on the side of the multiple curved grooves 200 away from the center of the rotor core 100, that is, arranged in the area formed between the second side wall 220 and the edge of the rotor core 100.
  • the rotor 10 with magnetic barriers further includes a plurality of permanent magnets 500, and the plurality of permanent magnets 500 are installed in the plurality of curved grooves 200.
  • the number of the permanent magnets 500 is set to be no less than the number of the curved grooves 200, and at least one permanent magnet 500 should be placed in each curved groove 200.
  • the shape of the permanent magnet 500 is adapted to the shape of the curved groove 200, and the permanent magnet 500 has at least two oppositely disposed side edges that abut against the inner wall surface of the curved groove 200 to ensure the stability of the permanent magnet 500 after being installed in the curved groove 200.
  • the appropriate amount of permanent magnet 500 residual magnetic flux density can make the gap between the two ends of the permanent magnet 500 and the two ends of the curved slot 200 appear a certain saturation, which is very beneficial for reducing the d-axis inductance.
  • the main output torque of the motor is the reluctance torque, especially when the motor enters the high-speed weak magnetic region, the proportion of the reluctance torque in the entire electromagnetic torque is further increased, so it is very necessary to select the appropriate permanent magnet 500 material performance to affect the difference between the d-axis inductance and the q-axis inductance.
  • the thickness of the permanent magnet 500 in the d-axis direction of the rotor 100 with magnetic barriers is T.
  • the magnetic barrier hole 310 has a first side 311 and a second side 312 that are arranged opposite to each other.
  • the second side 312 is located on the side of the first side 311 away from the center of the rotor core 100.
  • the distance from the first side 311 to the second side 312 is the thickness H of the magnetic barrier hole 310, and T>H is satisfied.
  • the greater the thickness of the permanent magnet 500 in the d-axis direction of the motor rotor with magnetic barriers the higher the permanent magnet torque of the motor, thereby increasing the output torque of the motor and the efficiency of the motor.
  • the thickness of the magnetic barrier hole 310 should not be too large. Therefore, the thickness of the permanent magnet 500 is set to be greater than the thickness of one layer of magnetic barrier hole 310.
  • the thickness of the magnetic barrier hole 310 refers to the distance from the first side 311 to the second side 312 of the magnetic barrier hole 310.
  • the thickness of the magnetic barrier hole 310 refers to the shortest distance from the first side 311 to the second side 312; if the first side 311 and the second side 312 are not arranged in parallel, the thickness of the magnetic barrier hole 310 refers to the distance from the first side 311 close to the middle part of the magnetic barrier hole 310 to the second side 312; if the magnetic barrier hole 310 is designed in an irregular shape, the thickness of the magnetic barrier hole 310 may be the average value between the maximum distance and the minimum distance from the first side 311 to the second side 312.
  • the thickness of the middle part of the permanent magnet 500 is greater than the thickness of the two ends of the permanent magnet 500.
  • the permanent magnet 500 can be set to a structure with a thick middle and thin ends, so that the thickness of the middle part of the permanent magnet 500 is greater than the thickness of its two ends.
  • the arc-shaped permanent magnet 500 is usually prone to local demagnetization in the middle inner surface area of the permanent magnet 500.
  • Designing the arc-shaped permanent magnet 500 to be a structure with a thick middle and thin ends can alleviate the local demagnetization phenomenon of the arc-shaped permanent magnet 500.
  • the use of this unequal thickness permanent magnet 500 design can also prevent the permanent magnet 500 from sliding in the curved groove 200, thereby improving the stability of the permanent magnet 500 installed in the curved groove 200.
  • a cross-axis magnetic conductive channel 600 is formed between a layer of the magnetic barrier hole 310 close to the curved groove 200 and the curved groove 200.
  • the width of the cross-axis magnetic conductive channel 600 will be increased, thereby increasing the q-axis inductance, that is, increasing the value of Lq, so that the inductance difference between Ld and Lq increases, increasing the magnetic resistance torque, and thus improving the torque output capacity of the motor.
  • the gap can be filled with air, and further, the gap can also be used to fill non-magnetic conductive medium. Specifically, filling the gap with air or non-magnetic conductive medium avoids the situation where the end of the permanent magnet 500 is easily demagnetized and the magnetization is not saturated, and the anti-demagnetization ability of the motor is also improved.
  • the curved groove 200 is arranged in a U-shape. Specifically, when the curved groove 200 is arranged in a U-shape, the curved groove 200 can be divided into three parts: a left part, a bottom part and a right part. The left part, the bottom part and the right part can be interconnected or blocked from each other, as long as the general shape thereof is arranged in a U-shape.
  • the permanent magnet 500 is arranged in a rectangular block shape, because the arc permanent magnet 500 is greatly affected by the material in the molding aspect, and there are many finishing processes in the later molding stage, while the molding and processing processes of the rectangular permanent magnet 500 are relatively simple, so the use of the rectangular permanent magnet 500 can improve production efficiency and has strong versatility.
  • the permanent magnet 500 can be placed in any one of the three parts of the left part, the bottom part and the right part, or in any two of the three parts of the left part, the bottom part and the right part, or in all of the three parts of the left part, the bottom part and the right part, and no specific restrictions are made on this.
  • the curved groove 200 is arranged in a V shape (not shown). Specifically, when the curved groove 200 is arranged in a V shape, the curved groove 200 can be divided into a left half and a right half, and the permanent magnet 500 is arranged in a rectangular block shape. The permanent magnet 500 can be installed in the left half of the curved groove 200, or in the right half of the curved groove 200, or in both the left half and the right half.
  • the curved groove 200 is arranged in an arc shape.
  • the shape of the permanent magnet 500 can also be arranged in an arc shape, and the shape of the permanent magnet 500 is adapted to the shape of the curved groove 200 , and the permanent magnet 500 is adapted to be installed in the curved groove 200 .
  • the present application also proposes a motor, the motor comprising a rotor 10 having a magnetic barrier, and a rotor sleeved on the rotor having a magnetic barrier.
  • the stator outside the rotor 10 with magnetic barriers includes a stator core and windings wound on the stator teeth.
  • the specific structure of the rotor 10 with magnetic barriers refers to the above embodiment. Since the motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the motor can be used in air-conditioning compressors, electric vehicles, fan systems, etc., which can increase the utilization of the motor reluctance torque, thereby improving the efficiency of the motor.
  • the thickness of the rotor 10 with magnetic barriers along the axial direction thereof is not less than the thickness of the stator along the axial direction thereof.
  • the permanent magnets 500 are installed in the curved slots 200 of the rotor core 100. By making the thickness of the rotor 10 with magnetic barriers thicker, the volume of the rotor core 100 for placing the permanent magnets 500 can be larger, thereby increasing the permanent magnet torque of the motor and improving the output capacity of the motor.
  • the present application also proposes a compressor, which includes the above-mentioned motor.
  • the specific structure of the motor refers to the above-mentioned embodiment. Since the compressor adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

La présente demande divulgue un rotor ayant des barrières magnétiques, un moteur et un compresseur. Le rotor ayant des barrières magnétiques comprend un noyau de fer de rotor, une pluralité de fentes coudées et une pluralité de groupes de barrière magnétique ; la pluralité de fentes coudées sont formées dans le noyau de fer de rotor et sont agencées à des intervalles le long de la direction circonférentielle du noyau de fer de rotor ; deux extrémités de chaque fente coudée s'étendent vers le bord du noyau de fer de rotor ; la pluralité de groupes de barrière magnétique sont disposés sur les côtés de la pluralité de rainures incurvées à distance du centre de cercle du noyau de fer de rotor ; chaque groupe de barrière magnétique comprend au moins une couche de n trous de barrière magnétique agencés à des intervalles le long de la direction circonférentielle du noyau de fer de rotor ; un canal de conduction magnétique d'axe droit est formé entre deux trous de barrière magnétique adjacents quelconques dans une couche de trous de barrière magnétique ; et la largeur du canal de conduction magnétique d'axe droit est d et la distance entre deux extrémités d'une couche de trous de barrière magnétique est D, qui satisfont à 1/6 ≤ (n-1) d/d ≤ 4/3.
PCT/CN2023/113613 2022-10-14 2023-08-17 Rotor ayant des barrières magnétiques, moteur et compresseur WO2024078131A1 (fr)

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Application Number Priority Date Filing Date Title
CN202211265485.8 2022-10-14
CN202211265485.8A CN116191723A (zh) 2022-10-14 2022-10-14 具有磁障的转子、电机及压缩机

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WO2024078131A1 true WO2024078131A1 (fr) 2024-04-18

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CN116191723A (zh) * 2022-10-14 2023-05-30 广东美芝制冷设备有限公司 具有磁障的转子、电机及压缩机

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CN116191723A (zh) * 2022-10-14 2023-05-30 广东美芝制冷设备有限公司 具有磁障的转子、电机及压缩机

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CN113162274A (zh) * 2021-05-10 2021-07-23 美的威灵电机技术（上海）有限公司 转子结构、电机结构和压缩机
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