Rotor, electric machine and compressor

Abstract

The utility model provides a kind of rotor, motor and compressor.The rotor includes: rotor core, rotor core is formed by the lamination of multiple rotor punching sheets, multiple V-type magnet grooves are equipped on rotor punching sheet, and V-type magnet groove is distributed along the circumference of rotor punching sheet;Each V-type magnet groove includes two mirror image symmetrical straight grooves, and the opening of V-type magnet groove is towards the outside of rotor punching sheet;The side of straight groove, which is away from the opening of V-type magnet groove, is provided with magnetic adjustment group, and each magnetic adjustment group includes at least one magnetic adjustment tape;Permanent magnet is arranged inside straight groove.The utility model sets magnetic adjustment tape on the side of straight groove, which is away from the opening of V-type magnet groove, optimizes the magnetic line distribution of rotor itself, and further optimizes the magnetic line distribution of air gap between stator and rotor of motor, so that air gap magnetic field is more evenly distributed, specific order electromagnetic force wave is inhibited, and further, the vibration and noise of motor are improved, and the performance indicators such as noise and vibration of compressor and complete machine system are improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a rotor, a motor, and a compressor. Background Technology

[0002] With social progress and economic development, people's living standards have significantly improved. When purchasing refrigeration equipment such as air conditioners and refrigerators, consumers are paying more attention to noise levels in addition to price. The compressor is the core component of refrigeration equipment like refrigerators and air conditioners, and the motor is the power output component of the compressor. The vibration and noise of the motor directly affect the vibration and noise levels of the refrigeration equipment. Optimizing the motor rotor and rationally arranging the tuning tape during motor design can significantly reduce the second-harmonic electromagnetic force of the motor. Therefore, how to optimize the position and size parameters of the tuning tape on the motor rotor to reduce compressor vibration and noise is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0003] In view of the problems in the prior art, the purpose of this utility model is to provide a rotor, motor and compressor to reduce compressor vibration and noise, and improve the performance indicators of the compressor and the whole system, such as noise and vibration.

[0004] This utility model embodiment provides a rotor, comprising:

[0005] The rotor core is formed by stacking multiple rotor laminations. Each rotor lamination includes multiple V-shaped magnet slots distributed circumferentially along the rotor lamination. Each V-shaped magnet slot includes two mirror-symmetrical straight slots, with the opening of the V-shaped magnet slot facing outwards from the rotor lamination. A magnetic adjustment group is provided on the side of the straight slot opposite to the opening of the V-shaped magnet slot, and each magnetic adjustment group includes at least one magnetic adjustment tape.

[0006] A permanent magnet is disposed inside the straight groove.

[0007] In some embodiments, the width of the permanent magnet is d, the number of the permanent magnets is N, and each tuning group includes N tuning tapes, satisfying: 1≤N≤d / 0.5.

[0008] In some embodiments, the thickness of the permanent magnet is h, and the width of the tuning tape is d1, satisfying: 0.1≤d1 / h≤0.4.

[0009] In some embodiments, the length of the tuning tape is L, satisfying: L*N / d≤0.5.

[0010] In some embodiments, the width of the tuning tape is d1, which satisfies: d1≥0.2mm.

[0011] In some embodiments, the tuning group includes a plurality of tuning tapes, and the distance between two adjacent tuning tapes in each tuning group is d2, satisfying: 0.5mm≤d2≤d.

[0012] In some embodiments, the shape of the tuning tape is square, semi-circular, triangular, elliptical, or trapezoidal.

[0013] In some embodiments, the tuning tape is connected to the straight slot, and the connection length between the tuning tape and the straight slot is L1, satisfying: L1≤d / 3.

[0014] This utility model embodiment also provides an electric motor, including the rotor described above.

[0015] This utility model also provides a compressor, including the motor described above.

[0016] The rotor, motor, and compressor provided by this utility model have the following advantages:

[0017] By setting a magnetic tape on the side of the rotor's straight slot away from the V-shaped magnet slot opening, the distribution of magnetic field lines of the rotor itself is optimized, which in turn optimizes the distribution of magnetic field lines of the air gap between the stator and rotor of the motor. This makes the air gap magnetic field distribution more uniform, improves the magnetic field characteristics of the motor, suppresses electromagnetic force waves of a specific order, and thus improves the vibration and noise of the motor, thereby enhancing the performance indicators of the compressor and the whole system, such as noise and vibration. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of a rotor according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A magnified view of a portion of the image;

[0021] Figure 3 This is a schematic diagram of a rotor-mounted magnetic tape being semi-circular according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the rotor adjusting the magnetic tape as a triangle according to another embodiment of this utility model;

[0023] Figure 5 This is a comparison diagram of the second harmonic first-order electromagnetic force of the motor provided by this utility model and the motor in the prior art.

[0024] Figure label:

[0025] 100 rotor core

[0026] 10 V-shaped magnet slot

[0027] 11 Straight Groove

[0028] 20 Magnetizing Group

[0029] 21-tone magnetic tape

[0030] 200 permanent magnet Detailed Implementation

[0031] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0032] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0033] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] It should be further understood that the terms "comprising" or "including" indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0035] To address the problems in the prior art, this utility model provides a rotor. Figure 1 A schematic diagram of a rotor provided in one embodiment of the present invention is shown. Figure 2 It shows Figure 1 A magnified view of a portion of the image. For example... Figure 1 and Figure 2 As shown, the rotor includes:

[0036] The rotor core 100 is formed by stacking multiple rotor laminations. Each rotor lamination includes multiple V-shaped magnet slots 10, which are distributed circumferentially along the rotor lamination. Each V-shaped magnet slot 10 includes two mirror-symmetrical straight slots 11, with the opening of the V-shaped magnet slot 11 facing the outside of the rotor lamination. A magnetic adjustment group 20 is provided on the side of the straight slot 11 away from the opening of the V-shaped magnet slot 10, and each magnetic adjustment group 20 includes at least one magnetic adjustment tape 21.

[0037] The permanent magnet 200 is located inside the straight groove 11.

[0038] In this technical solution, by setting a tuning tape 21 on the side of the rotor's straight slot 11 away from the opening of the V-shaped magnet slot 10, the magnetic field line distribution of the rotor itself is optimized, thereby optimizing the magnetic field line distribution of the air gap between the stator and rotor of the motor. This makes the air gap magnetic field distribution more uniform, improves the magnetic field characteristics of the motor, suppresses electromagnetic force waves of a specific order, and thus improves the vibration and noise of the motor, thereby improving the performance indicators of the compressor and the whole system, such as noise and vibration.

[0039] Furthermore, such as Figure 1 and Figure 2 As shown, the width of the permanent magnet 200 is d, and each tuning group 20 includes N tuning tapes 21, satisfying: 1≤N≤d / 0.5. By setting the relationship between the tuning tapes 21 and the width d of the permanent magnet 200, the number of tuning tapes in each tuning group 20 can be reasonably set, avoiding the influence of the number of tuning tapes 21 on the strength of the V-shaped magnet groove.

[0040] Furthermore, such as Figure 1 and Figure 2 As shown, the thickness of the permanent magnet 200 is h, and the width of the tuning tape 21 is d1, satisfying: 0.1 ≤ d1 / h ≤ 0.4. When d1 / h < 0.1, the setting of the tuning tape 21 has no effect on motor noise; when d1 / h > 0.4, the setting of the tuning tape 21 will affect the motor efficiency. Therefore, by setting the relationship between the thickness of the permanent magnet 200 and the width d1 of the tuning tape 21, the motor can improve noise without affecting its performance.

[0041] Furthermore, such as Figure 1 and Figure 2As shown, the length of the tuning tape 21 is L, satisfying: L*N / d≤0.5. By setting the relationship between the length of the tuning tape 21 in each tuning group 20 and the width d of its corresponding permanent magnet 200, the setting of the tuning tape 21 can effectively improve the noise of the motor.

[0042] Furthermore, such as Figure 1 and Figure 2 As shown, the width of the tuning tape 21 is d1, which satisfies: d1 ≥ 0.2 mm. When d1 < 0.2 mm, the tuning tape 21 has no effect on improving the noise of the motor.

[0043] Furthermore, such as Figure 1 and Figure 2 As shown, the tuning group 20 includes multiple tuning tapes 21. The distance between two adjacent tuning tapes 21 in each tuning group 20 is d2, which satisfies: 0.5mm≤d2≤d. By setting the size of the distance d2 between two adjacent tuning tapes 21 in each tuning group 20, the motor noise is improved while avoiding the setting of the permanent magnet 200 if the gap between the tuning tapes 21 is too small.

[0044] Furthermore, the shape of the magnetic tape 21 can be square, semi-circular, triangular, elliptical, or trapezoidal. Figure 3 This diagram illustrates a semi-circular rotor-mounted magnetic tape according to an embodiment of the present invention; as shown... Figure 3 As shown, the tuning tape 21 is semi-circular. Figure 4 This diagram illustrates a triangular rotor-mounted magnetic tape according to an embodiment of the present invention; as shown. Figure 4 As shown, the tuning tape 21 is triangular. However, it should be noted that the shape of the tuning tape 21 can be set according to actual needs, and no specific restrictions are imposed here.

[0045] Furthermore, such as Figure 1 and Figure 2 As shown, the tuning tape 21 is connected to the straight slot 11, and the connection length between the tuning tape 21 and the straight slot 11 is L1, which satisfies: L1≤d / 3. By setting the relationship between the connection length L1 between the tuning tape 21 and the straight slot 11, the permanent magnet 200 can be well assembled in the V-shaped magnet slot 10.

[0046] This utility model also provides an electric motor, including the rotor as described above. The motor includes the rotor as described above, thus achieving all the technical effects of the aforementioned rotor, namely, optimizing the magnetic field distribution of the rotor itself, and consequently optimizing the magnetic field distribution of the air gap between the stator and rotor of the motor, making the air gap magnetic field distribution more uniform, improving the magnetic field characteristics of the motor, suppressing electromagnetic force waves of a specific order, and thus improving the vibration and noise of the motor, and enhancing the performance indicators of the compressor and the entire system, such as noise and vibration. Furthermore, the number of poles of the motor is P, and the number of slots of the motor is Z, satisfying: 4≤P≤10, Z / P=3 / 2.

[0047] To further confirm the beneficial effects of the motor provided in this embodiment, the amplitude of the second harmonic first-order electromagnetic force generated by motors in the prior art and the motor provided in this invention is compared. The electromagnetic noise / vibration of the motor is mainly driven by the radial electromagnetic force in the air gap. The second harmonic first-order electromagnetic force is one of the most important low-order electromagnetic force waves. The higher the amplitude of the electromagnetic force, the higher the vibration displacement and noise are usually. Figure 5 A comparison diagram is shown of the amplitude of the second harmonic first-order electromagnetic force generated by a motor in the prior art and the motor provided in this embodiment of the present invention. For example... Figure 5 As shown, the horizontal axis represents the motor in the prior art (untuned magnetic tape) and the motor provided in this embodiment of the invention (tuned magnetic tape), while the vertical axis represents the amplitude of the second-order electromagnetic force. The amplitude of the second-order electromagnetic force generated by the motor in the prior art is set at 100%, while the amplitude of the second-order electromagnetic force generated by the motor provided in this embodiment of the invention is approximately 78%. In other words, the amplitude of the second-order electromagnetic force generated by the motor provided in this embodiment of the invention is approximately 78% of the amplitude of the second-order electromagnetic force generated by the motor in the prior art, meaning the amplitude of the second-order electromagnetic force generated by the motor provided in this embodiment of the invention is smaller than that generated by the motor in the prior art. A motor with a smaller second-order electromagnetic force amplitude has less noise and vibration; therefore, compared to motors in the prior art, the motor provided in this embodiment of the invention has lower noise and vibration.

[0048] This utility model also provides a compressor, including the motor described above. The compressor includes the motor described above, and therefore achieves all the technical effects of the aforementioned motor, which will not be elaborated further here.

[0049] In summary, the rotor, motor, and compressor provided by this utility model have the following advantages:

[0050] By setting a tuning tape on the side of the rotor's straight slot away from the V-shaped magnet slot opening, and by reasonably setting the size and position of the tuning tape, the magnetic field distribution of the rotor itself is optimized, thereby optimizing the magnetic field distribution of the air gap between the stator and rotor of the motor. This makes the air gap magnetic field distribution more uniform, improves the magnetic field characteristics of the motor, suppresses electromagnetic force waves of a specific order, and thus improves the vibration and noise of the motor, thereby improving the performance indicators of the compressor and the whole system, such as noise and vibration.

[0051] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A rotor, characterized in that, include: The rotor core is formed by stacking multiple rotor laminations. Each rotor lamination has multiple V-shaped magnet slots distributed circumferentially along the rotor lamination. Each V-shaped magnet slot includes two mirror-symmetrical straight slots, and the opening of the V-shaped magnet slot faces the outside of the rotor lamination. A magnetic adjustment group is provided on the side of the straight slot away from the opening of the V-shaped magnet slot, and each magnetic adjustment group includes at least one magnetic adjustment tape. A permanent magnet is disposed inside the straight groove.

2. The rotor according to claim 1, characterized in that, The width of the permanent magnet is d, the number of the permanent magnets is N, and each tuning group includes N tuning tapes, satisfying: 1≤N≤d / 0.

5.

3. The rotor according to claim 1, characterized in that, The thickness of the permanent magnet is h, and the width of the tuning tape is d1, satisfying: 0.1≤d1 / h≤0.

4.

4. The rotor according to claim 2, characterized in that, The length of the tuning tape is L, which satisfies: L*N / d≤0.

5.

5. The rotor according to claim 3, characterized in that, The width of the tuning tape is d1, which satisfies: d1≥0.2mm.

6. The rotor according to claim 2, characterized in that, The tuning group includes multiple tuning tapes, and the distance between two adjacent tuning tapes in each tuning group is d2, which satisfies: 0.5mm≤d2≤d.

7. The rotor according to claim 1, characterized in that, The shape of the tuning tape is square, semi-circular, triangular, elliptical, or trapezoidal.

8. The rotor according to claim 2, characterized in that, The tuning tape is connected to the straight slot, and the connection length between the tuning tape and the straight slot is L1, which satisfies: L1≤d / 3.

9. An electric motor, characterized in that, Includes the rotor as described in any one of claims 1 to 8.

10. A compressor, characterized in that, Includes the motor as described in claim 9.

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