Rotor and motor

Abstract

The rotor comprises a rotor iron core and a plurality of permanent magnets, the rotor iron core is provided with a plurality of magnetic steel grooves and a plurality of glue storage grooves, each magnetic steel groove is communicated with at least one glue storage groove, adhesive is arranged in the glue storage grooves, and the permanent magnets are arranged on the magnetic steel grooves. Each permanent magnet is correspondingly arranged in the corresponding magnetic steel groove and is adhered to the rotor core through the adhesive, and at least one opening groove is circumferentially formed in the outer surface of the rotor core. According to the utility model, through arranging the glue storage groove, the permanent magnet and the material piece can be bonded on the rotor iron core so as to ensure the structural strength of the rotor iron core and ensure that the leakage flux in the rotor iron core is not changed, and through arranging the open groove, the leakage flux at the outer edge of the rotor iron core basically does not exist, thereby increasing the counter electromotive force of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor and a motor. Background Art

[0002] Traditional tangential rotor permanent magnet motors (PMMs) present a significant problem: the magnetic field distribution characteristics of the rotor's internal shaft surface and the rotor's outer surface result in significant magnetic flux leakage in these areas. This leakage not only reduces the motor's back EMF, thereby affecting its power density, but also increases its energy consumption and heat generation, impacting its long-term stable operation.

[0003] Specifically, if Figure 1 and Figure 2 As shown in Figure 1, a permanent magnet motor with a tangential rotor structure primarily consists of a stator core, windings, permanent magnets, a rotor core, and a rotating shaft. The evenly distributed magnetic isolation bridges on the rotor core can limit magnetic flux leakage, but to ensure the structural strength of the rotor core, the magnetic isolation bridges must be of a certain thickness, which inevitably results in significant magnetic flux leakage around them. Utility Model Content

[0004] The purpose of the utility model is to provide a rotor and a motor, aiming to solve the problems of serious magnetic leakage in existing tangential permanent magnet motors.

[0005] An embodiment of the present utility model provides a rotor, comprising: a rotor core and a plurality of permanent magnets, wherein the rotor core is provided with a plurality of magnetic steel slots and a plurality of glue storage slots, each of the magnetic steel slots is connected to at least one of the glue storage slots, and the glue storage slots contain an adhesive, each of the permanent magnets is correspondingly arranged in the magnetic steel slot and bonded to the rotor core through the adhesive, and the outer surface of the rotor core is circumferentially provided with at least one open slot.

[0006] Furthermore, the rotor also includes at least one material piece, at least one air groove is provided on the rotor core, each of the air grooves is connected to at least one glue storage groove, the air groove is arranged between at least two of the magnetic steel grooves, and each of the material pieces is arranged in the corresponding air groove and is bonded to the rotor core through the adhesive.

[0007] Furthermore, the material of the material piece is a non-magnetic material, or the material piece is a permanent magnet.

[0008] Furthermore, multiple permanent magnets are arranged along the circumference of the rotor core, and multiple material pieces are arranged along the circumference of the rotor core. The material pieces are arranged at one end close to the center of the rotor core and away from the open slot on the outer circumferential surface of the rotor core.

[0009] Further, the shape of the air groove is quadrilateral, and the air groove has two relatively arranged parallel sides and two relatively arranged non-parallel sides.

[0010] Further, each of the opening grooves communicates with the corresponding magnet groove.

[0011] Further, the width of the notch of the opening groove is smaller than the width of the permanent magnet.

[0012] Further, the air groove is symmetrically arranged with respect to the magnetic pole line of the permanent magnet in the magnet groove.

[0013] Further, the air groove is axially symmetric with respect to the corresponding material part.

[0014] An embodiment of the present invention further provides a motor, including: the above-mentioned rotor.

[0015] The present invention discloses a rotor and a motor. The rotor includes: a rotor core and a plurality of permanent magnets. The rotor core is provided with a plurality of magnet grooves and a plurality of glue storage grooves. Each of the magnet grooves communicates with at least one of the glue storage grooves. The glue storage groove contains an adhesive. Each permanent magnet is correspondingly arranged in the magnet groove and is bonded to the rotor core through the adhesive. At least one opening groove is circumferentially arranged on the outer surface of the rotor core. By providing the glue storage groove, the permanent magnet can be bonded to the rotor core to ensure the structural strength of the rotor core, ensure that the magnetic leakage in the rotor core remains unchanged, and at the same time, by providing the opening groove, the magnetic leakage at the outer edge of the rotor core is basically eliminated, thereby increasing the back electromotive force of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic structural diagram of an existing permanent magnet motor;

[0018] Figure 2 is a schematic structural diagram of an existing tangential rotor;

[0019] Figure 3 is a schematic structural diagram of the motor of this embodiment;

[0020] Figure 4 is a schematic structural diagram of the rotor of this embodiment;

[0021] Figure 5Partial view of the rotor of this embodiment;

[0022] Figure 6 Structural schematic diagram of the rotor core of this embodiment;

[0023] Figure 7 Comparison diagram of the back electromotive force effects of an existing motor, a motor with non-permanent magnet material parts, and a motor with permanent magnet material parts;

[0024] Explanation of the markings in the figure:

[0025] 1. Rotor core; 2. Permanent magnet; 3. Magnet steel groove; 4. Glue storage groove; 5. Open groove; 6. Material part; 7. Air groove; 8. Magnetic isolation bridge. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0028] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0029] It should be further understood that the term " / and / " used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0030] Please refer to Figures 3-6 , this embodiment provides a rotor, including: a rotor core 1 and a plurality of permanent magnets 2. The rotor core 1 is provided with a plurality of magnet steel grooves 3 and a plurality of glue storage grooves 4. Each magnet steel groove 3 communicates with at least one glue storage groove 4. The glue storage groove 4 contains an adhesive. Each permanent magnet 2 is correspondingly arranged in the magnet steel groove 3 and is bonded to the rotor core 1 through the adhesive. At least one open groove 5 is circumferentially arranged on the outer surface of the rotor core 1.

[0031] In this embodiment, by providing a glue storage groove 4, the permanent magnet 2 can be bonded to the rotor core 1 to ensure the structural strength of the rotor core 1, ensuring that the magnetic leakage in the rotor core 1 remains unchanged. At the same time, by providing an opening groove 5, there is basically no magnetic leakage at the outer edge of the rotor core 1, thereby increasing the back electromotive force of the motor.

[0032] Specifically, the rotor further includes at least one material piece 6. At least one air groove 7 is provided on the rotor core 1. Each air groove 7 communicates with at least one glue storage groove 4. The air grooves 7 are provided between at least two magnet grooves 3. Each material piece 6 is disposed in the corresponding air groove 7 and is bonded to the rotor core 1 through an adhesive. Among them, the material of the material piece 6 is a non-magnetic material, or the material piece 6 is a permanent magnet.

[0033] By providing the air grooves 7 and utilizing the non-magnetic property of the air grooves 7, the magnetic field generated by the permanent magnet 2 can only pass through the magnetic isolation bridge 8, thereby reducing magnetic leakage. The permanent magnet 2 and the material piece 6 are fixed to the rotor core 1 through the glue storage groove 4, ensuring the stability and reliability of the motor during operation. At the same time, this fixing method can reduce the noise and damage risk caused by vibration.

[0034] Furthermore, a plurality of permanent magnets 2 are arranged along the circumferential direction of the rotor core 1, and a plurality of material pieces 6 are arranged along the circumferential direction of the rotor core 1. The material pieces 6 are arranged at one end close to the center of the rotor core 1.

[0035] The permanent magnet 2 is bonded to the inner side of the rotor core 1 through the glue in the glue storage groove 4, and the material piece 6 is bonded to the inner side and the outer side of the rotor core 1 through the glue storage groove 4. Through the above bonding, the structural strength of the rotor core 1 can be ensured, and the thickness of the magnetic isolation bridge 8 (as Figure 5 shown) remains unchanged, so that the magnetic leakage at the surface of the shaft close to the rotor interior remains unchanged.

[0036] In some embodiments, the material piece 6 is a permanent magnet. When the material piece 6 is a permanent magnet, it can participate in the main magnetic circuit, thereby further increasing the back electromotive force of the motor.

[0037] Furthermore, when the material piece 6 is a permanent magnet, the magnetic field directions of both the material piece 6 and the permanent magnet 2 flow from the inner side to the outer side of the rotor, or in the opposite direction. The structural design in which at least two permanent magnets 2 and at least one material piece 6 provide the same magnetic field direction enables the magnetic field to form a coherent magnetic flux path inside the rotor. This consistent magnetic field direction helps to improve the torque and efficiency of the motor because the magnetic field can interact more effectively with the stator winding.

[0038] In this embodiment, the shape of the air groove 7 is a quadrilateral, and the air groove 7 has two relatively arranged parallel sides and two relatively arranged non-parallel sides.

[0039] Such a design enables the material part 6 to be designed as a square, which is convenient for processing, thereby reducing the processing cost.

[0040] Among them, the shape of the opened air groove 7 is not limited. The shape of the air groove 7 can be regular shapes such as trapezoid-like, square, etc., or irregular shapes such as special-shaped.

[0041] In this embodiment, each opening groove 5 communicates with the corresponding magnet groove 3.

[0042] The connection between the opening groove 5 and the magnet groove 3 helps to further improve the performance of the motor.

[0043] In this embodiment, please refer to Figure 5 , the groove width W of the opening groove 5 is smaller than the width W1 of the permanent magnet 2.

[0044] The groove width of the opening groove 5 being smaller than the width of the permanent magnet 2 helps to enhance the fixation of the permanent magnet 2 in the magnet groove 3, prevent the permanent magnet 2 from shifting or falling off during operation, and ensure the stable operation of the motor.

[0045] In this embodiment, the air grooves 7 on both sides of the magnet groove 3 are symmetrically arranged with respect to the magnetic pole line N of the permanent magnet 2 in the magnet groove 3 (as Figure 4 shown).

[0046] The structural design of the symmetrically arranged air grooves 7 makes the effects on each magnetic pole completely consistent, the magnetic circuit is symmetric, and the effects of concentrating magnetic flux and reducing magnetic flux leakage are better. The symmetrically arranged air grooves 7 can effectively reduce the torque ripple caused by uneven magnetic fields, make the operation of the motor more stable, and reduce mechanical vibration and noise.

[0047] In some embodiments, multiple air grooves 7 are provided between the two permanent magnets 2. The provision of multiple air grooves 7 can significantly improve the magnetic field line distribution, thereby improving the magnetic flux concentration effect and reducing magnetic flux leakage.

[0048] In this embodiment, the adhesive can be viscous substances such as glue, tape, hot melt adhesive, epoxy resin, and silicone.

[0049] In some embodiments, multiple glue storage grooves 4 communicate with the magnet groove 3, and multiple glue storage grooves 4 communicate with the air groove 7. The arrangement of multiple glue storage grooves 4 communicating with the magnet groove 3 can improve the bonding strength between the permanent magnet 2 and the rotor core 1, and the arrangement of multiple glue storage grooves 4 communicating with the air groove 7 can improve the bonding strength between the material part 6 and the rotor core 1, thereby improving the stability and reliability of the motor.

[0050] In this embodiment, the air groove 7 is axially symmetric with respect to the corresponding material part 6.

[0051] The axisymmetric design makes the air grooves 7 evenly distributed on both sides of the material piece 6, thereby enhancing the stability of the overall structure. This design helps to reduce the stress concentration that may be caused by structural asymmetry and reduces the risk of structural failure. The axisymmetric design of the air grooves 7 helps to reduce the magnetic resistance, enabling the magnetic field to pass through the material piece 6 more smoothly, improving the output power and efficiency of the motor. The axisymmetric design also helps to improve the uniformity of the magnetic field distribution, reduce magnetic field distortion and magnetic leakage phenomena, and improve the overall performance of the motor.

[0052] In this embodiment, two permanent magnets 2 and the material piece 6 located between the two permanent magnets 2 form a permanent magnet assembly. A plurality of permanent magnet assemblies are provided, and the plurality of permanent magnet assemblies are arranged circumferentially along the rotor core 1.

[0053] The circumferential arrangement of the plurality of permanent magnet assemblies can produce a superimposed magnetic field effect, enhancing the magnetic field intensity near the rotor core 1. A stronger magnetic field helps to increase the torque and power density of the motor, enabling the motor to output greater power under the same volume.

[0054] Please refer to Figure 7 , in practical applications, compared with the no-load back electromotive force A of the prior art, the no-load back electromotive force B using the above structure but with the material piece 6 being a non-permanent magnet can be increased by 3%, and compared with the no-load back electromotive force B, the no-load back electromotive force C using the above structure and with the material piece 6 being N35 (i.e., when the material piece 6 is a permanent magnet) is further increased by 14%.

[0055] This embodiment also provides a motor, including: the rotor of the above embodiment.

[0056] The various embodiments in the specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0057] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive.

[0058] Comprising, such that a process, method, article, or apparatus that includes a series of elements includes not only those elements but also other elements not expressly listed, or elements that are inherent to such process, method, article, or apparatus. Without further limitation, an element qualified by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the recited element.

Claims

1. A rotor, characterized in that, Comprising: A rotor core and a plurality of permanent magnets. The rotor core is provided with a plurality of magnet slots and a plurality of glue storage slots. Each of the magnet slots communicates with at least one of the glue storage slots. There is an adhesive in the glue storage slot. Each permanent magnet is correspondingly arranged in the magnet slot and is bonded to the rotor core through the adhesive. At least one opening slot is circumferentially arranged on the outer surface of the rotor core.

2. The rotor according to claim 1, characterized in that, The rotor further includes at least one material piece. At least one air slot is arranged on the rotor core. Each air slot communicates with at least one of the glue storage slots. The air slot is arranged between at least two of the magnet slots. Each material piece is arranged in the corresponding air slot and is bonded to the rotor core through the adhesive.

3. The rotor according to claim 2, characterized in that, The material of the material piece is a non-magnetic material, or the material piece is a permanent magnet.

4. The rotor according to claim 2, characterized in that, A plurality of the permanent magnets are arranged along the circumference of the rotor core, and a plurality of the material pieces are arranged along the circumference of the rotor core. The material pieces are arranged at one end close to the center of the rotor core.

5. The rotor according to claim 3, characterized in that The shape of the air slot is quadrilateral, and the air slot has two relatively arranged parallel sides and two relatively arranged non-parallel sides.

6. The rotor according to claim 1, wherein Each opening slot communicates with the corresponding magnet slot.

7. The rotor according to claim 1, characterized in that, The width of the opening of the opening slot is smaller than the width of the permanent magnet.

8. The rotor according to claim 2, characterized in that The air slot is symmetrically arranged with respect to the magnetic pole line of the permanent magnet in the magnet slot.

9. The rotor according to claim 2, characterized in that, The air slot is axisymmetric with respect to the corresponding material piece.

10. A motor, characterized in that, Comprising: The rotor according to any one of claims 1-9.

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