Unipolar rotor lamination and electric machine

Abstract

The utility model provides a kind of single polarity rotor punching sheet and motor, single polarity rotor punching sheet includes punching sheet body, the end face of punching sheet body has at least two magnetic steel grooves, at least two magnetic steel grooves are interval arranged along the circumferential direction of punching sheet body, the end face of punching sheet body has first weight-reducing hole, the number of first weight-reducing hole is equal to the number of magnetic steel groove, first weight-reducing hole is located in the inside of magnetic steel groove, first weight-reducing hole is the arc-shaped hole curved towards the center direction of punching sheet body, first weight-reducing hole is surrounded by first arc segment, left half circle arc segment, second arc segment and right half circle arc segment in turn, multiple first weight-reducing holes are interval arranged along the circumferential direction of punching sheet body.Under the strength requirement of ensuring rotor punching sheet, the weight of rotor punching sheet is maximized to reduce, and also can even punching sheet body's rotor mass, to reduce eccentric possibility, inhibit the radial unbalanced magnetic pull generated by eccentric, also can optimize magnetic field, make motor operation reliability increase.

Description

Technical Field

[0001] This utility model relates to a unipolar rotor lamination and a motor. Background Technology

[0002] Current motor rotors utilize a laminated iron core structure, which suffers from an unreasonable core design, resulting in a heavy rotor core with high rotational inertia. This leads to significant losses during motor operation, hindering substantial efficiency improvements. Furthermore, the poorly designed and heavy rotor core contributes to poor motor stability and high noise levels during assembly and use. However, as a crucial component of the motor, the rotor core is used for the installation and fixation of the magnet blocks, and it must meet both strength and magnetic flux requirements. Therefore, developing a lightweight rotor core with superior radial magnetic force has become an urgent technical challenge. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a unipolar rotor lamination and motor.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A unipolar rotor lamination includes a lamination body. The end face of the lamination body has at least two magnet slots, which are spaced apart along the circumferential direction of the lamination body. The end face of the lamination body has first weight-reducing holes, the number of which is equal to the number of magnet slots. The first weight-reducing holes are located inside the magnet slots and are arc-shaped holes curved toward the center of the lamination body. Each first weight-reducing hole is formed by a first arc segment, a left semicircular arc segment, a second arc segment, and a right semicircular arc segment connected in sequence. A plurality of first weight-reducing holes are spaced apart along the circumferential direction of the lamination body.

[0006] In this scheme, the unipolar rotor lamination is used in a unipolar motor. The unipolar rotor lamination has a magnetic slot on its end face. The magnetic slot is used to install unipolar permanent magnets to save the number of permanent magnets. After the unipolar permanent magnets are installed in the magnetic slots, alternating permanent magnet poles and silicon steel poles are formed on the outer circumferential surface of the unipolar rotor lamination along the circumferential direction. The permanent magnet poles are the poles where the magnetic slots are located, and the silicon steel poles are formed between adjacent permanent magnet poles. A first weight-reducing hole is provided on the end face of the unipolar rotor lamination. The first weight-reducing hole is located inside the magnet slot and corresponds one-to-one with the magnet slot. The first weight-reducing hole is an arc-shaped hole that bends towards the center of the lamination body. While ensuring the strength requirements of the rotor lamination, the weight of the rotor lamination is reduced to the maximum extent, thereby reducing the moment of inertia. It can also even out the rotor mass of the lamination body, so that the center of mass is located at the center of the lamination body, reducing the imbalance, thereby reducing the possibility of eccentricity, suppressing the radial unbalanced magnetic pull caused by eccentricity, and increasing the reliability of motor operation. Furthermore, the first weight-reducing hole is formed by the sequential connection of a first arc segment, a left semi-circular arc segment, a second arc segment, and a right semi-circular arc segment. This facilitates the processing and manufacturing of the first weight-reducing hole, and also allows the magnetic field of the permanent magnet pole to pass smoothly through the silicon steel pole, while preventing the magnetic field of the permanent magnet pole from being conducted in a straight line towards the center of the lamination body, reducing magnetic leakage towards the center of the lamination body.

[0007] Preferably, both the first arc segment and the second arc segment are circular arc segments, and the center of the first arc segment and the center of the second arc segment are both located at the center of the lamination body.

[0008] In this solution, the above-mentioned structural design can prevent the magnetic field of the permanent magnet pole from being conducted in a straight line to the center of the lamination body, thus avoiding magnetic leakage, and also facilitates the processing and fabrication of the first weight-reducing hole.

[0009] Preferably, the value of the diameter D2 of the first arc segment is... The value of the diameter D3 of the second arc segment is Where D1 is the diameter of the lamination body.

[0010] In this solution, the above-mentioned structural configuration can maximize the reduction of rotor lamination weight and effectively prevent magnetic leakage of permanent magnet poles towards the center of the lamination body.

[0011] Preferably, the end face of the lamination body also has a second weight-reducing hole, and the second weight-reducing hole is provided between adjacent first weight-reducing holes.

[0012] In this scheme, since the first weight reduction hole corresponds one-to-one with the magnetic steel groove, and the second weight reduction hole is set between adjacent first weight reduction holes, the area between the second weight reduction hole and the adjacent magnetic steel groove (the area where the silicon steel pole is located) also corresponds one-to-one. This can prevent the magnetic force at the silicon steel pole from propagating in a straight line towards the center of the lamination body, thereby reducing magnetic leakage.

[0013] Preferably, the second weight-reducing hole is a circular hole, and the center of the circular hole is located at a diameter of On the circle, the diameter D of the circular hole k2 The value is

[0014] In this solution, the above-mentioned structural configuration can maximize the reduction of rotor lamination weight and effectively prevent magnetic leakage from the silicon steel poles towards the center of the lamination body.

[0015] Preferably, the end face of the lamination body also has a third weight-reducing hole, the number of the third weight-reducing holes is equal to the number of the second weight-reducing holes, and the third weight-reducing hole is provided between each of the second weight-reducing holes and the shaft hole of the lamination body, and the diameter of the third weight-reducing hole is larger than the diameter of the second weight-reducing hole.

[0016] In this design, the third weight-reducing hole is located inside the second weight-reducing hole and corresponds one-to-one with the second weight-reducing hole, while avoiding the first and second weight-reducing holes. Thus, the diameter of the third weight-reducing hole can be configured to be larger than that of the second weight-reducing hole, which can maximize the reduction of the weight of the lamination body and optimize the magnetic field, reducing magnetic leakage towards the center of the lamination body.

[0017] Preferably, the third weight-reducing hole is a circular hole, and the center of the third weight-reducing hole and the center of the second weight-reducing hole are both located on a straight line passing through the center of the lamination body.

[0018] In this solution, the above-mentioned structural design facilitates the fabrication of the third weight-reducing hole and provides a better magnetic shielding effect, reducing magnetic leakage towards the center of the lamination body.

[0019] Preferably, the centers of the plurality of third weight-reducing holes are all located at a diameter of On the circle.

[0020] In this scheme, the above-mentioned structural setting not only facilitates the production of the third weight-reducing hole, but also places the center of mass of the lamination body at the center, reducing the amount of imbalance, thereby reducing the possibility of eccentricity, suppressing the radial unbalanced magnetic pull caused by eccentricity, and increasing the reliability of motor operation.

[0021] Preferably, the diameter D of the third weight-reducing hole k3 The value is

[0022] In this solution, the above-mentioned structural configuration can maximize the reduction of rotor lamination weight and effectively prevent magnetic leakage from the silicon steel poles towards the center of the lamination body.

[0023] An electric motor comprising, as described above, unipolar rotor laminations.

[0024] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0025] The positive and progressive effects of this utility model are as follows: the unipolar rotor lamination is used in a unipolar motor. The unipolar rotor lamination has a magnetic steel groove on its end face. The magnetic steel groove is used to install unipolar permanent magnets to save the number of permanent magnets. When the unipolar permanent magnet is installed in the magnetic steel groove, alternating permanent magnet poles and silicon steel poles are formed on the outer peripheral surface of the unipolar rotor lamination along the circumferential direction. The permanent magnet poles are the poles where the magnetic steel grooves are located, and the silicon steel poles are formed between adjacent permanent magnet poles. A first weight-reducing hole is provided on the end face of the unipolar rotor lamination. The first weight-reducing hole is located inside the magnet slot and corresponds one-to-one with the magnet slot. The first weight-reducing hole is an arc-shaped hole that bends towards the center of the lamination body. While ensuring the strength requirements of the rotor lamination, the weight of the rotor lamination is reduced to the maximum extent, thereby reducing the moment of inertia. It can also even out the rotor mass of the lamination body, so that the center of mass is located at the center of the lamination body, reducing the imbalance, thereby reducing the possibility of eccentricity, suppressing the radial unbalanced magnetic pull caused by eccentricity, and increasing the reliability of motor operation. Furthermore, the first weight-reducing hole is formed by the sequential connection of a first arc segment, a left semi-circular arc segment, a second arc segment, and a right semi-circular arc segment. This facilitates the processing and manufacturing of the first weight-reducing hole, and also allows the magnetic field of the permanent magnet pole to pass smoothly through the silicon steel pole, while preventing the magnetic field of the permanent magnet pole from being conducted in a straight line towards the center of the lamination body, reducing magnetic leakage towards the center of the lamination body. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a unipolar rotor lamination according to a preferred embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] Film processing body 1

[0029] Magnetic steel trough 11

[0030] First weight reduction hole 12

[0031] First arc segment 121

[0032] Left semicircular arc segment 122

[0033] Second arc segment 123

[0034] Right semicircular arc segment 124

[0035] Second weight reduction hole 13

[0036] Third weight reduction hole 14

[0037] Shaft hole 15

[0038] Permanent magnet pole 100

[0039] Silicon steel electrode 200 Detailed Implementation

[0040] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment as an example.

[0041] like Figure 1 As shown, this embodiment discloses a unipolar rotor lamination, which includes a lamination body 1. The end face of the lamination body 1 has five magnetic slots 11, which are spaced apart along the circumferential direction of the lamination body 1. The end face of the lamination body 1 has first weight-reducing holes 12, the number of which is equal to the number of magnetic slots 11. The first weight-reducing holes 12 are located inside the magnetic slots 11 and are arc-shaped holes curved toward the center of the lamination body 1. The first weight-reducing holes 12 are formed by a first arc segment 121, a left semicircular arc segment 122, a second arc segment 123, and a right semicircular arc segment 124 connected in sequence. Multiple first weight-reducing holes 12 are spaced apart along the circumferential direction of the lamination body 1. In an optional embodiment, the number of magnetic slots 11 can be selected according to user needs and can be more than two.

[0042] like Figure 1As shown, the unipolar rotor lamination is used in a unipolar motor. The unipolar rotor lamination has a magnetic slot 11 on its end face. The magnetic slot 11 is used to install unipolar permanent magnets to save the number of permanent magnets. When the unipolar permanent magnets are installed in the magnetic slot 11, alternating permanent magnet poles 100 and silicon steel poles 200 are formed on the outer circumferential surface of the unipolar rotor lamination along the circumferential direction. The permanent magnet poles 100 are the poles where the magnetic slots 11 are located, and the silicon steel poles 200 are formed between adjacent permanent magnet poles 100. A first weight-reducing hole 12 is provided on the end face of the unipolar rotor lamination. The first weight-reducing hole 12 is located inside the magnet slot 11 and corresponds one-to-one with the magnet slot 11. The first weight-reducing hole 12 is an arc-shaped hole that bends toward the center of the lamination body 1. While ensuring the strength requirements of the rotor lamination, the weight of the rotor lamination is reduced to the maximum extent, and the moment of inertia is reduced accordingly. It can also even out the rotor mass of the lamination body 1, so that the center of mass is located at the center of the lamination body 1, reducing the amount of imbalance, thereby reducing the possibility of eccentricity, suppressing the radial unbalanced magnetic pull caused by eccentricity, and increasing the reliability of motor operation. Furthermore, the first weight-reducing hole 12 is formed by sequentially connecting the first arc segment 121, the left semicircular arc segment 122, the second arc segment 123, and the right semicircular arc segment 124. This facilitates the fabrication of the first weight-reducing hole 12 and allows the magnetic field of the permanent magnet pole 100 to pass smoothly through the silicon steel pole 200, while preventing the magnetic field of the permanent magnet pole 100 from being conducted in a straight line towards the center of the lamination body 1, thus reducing magnetic leakage towards the center of the lamination body 1. At the same time, the arc-shaped first weight-reducing hole 12 also improves the heat dissipation effect of the rotor lamination.

[0043] In this embodiment, both the first arc segment 121 and the second arc segment 123 are circular arc segments, and the center of the first arc segment 121 and the center of the second arc segment 123 are located at the center of the lamination body 1. The first weight-reducing hole 12, as configured in this way, can prevent the magnetic field of the permanent magnet pole 100 from being conducted in a straight line to the center of the lamination body 1, thus avoiding magnetic leakage, and also facilitates the processing and manufacturing of the first weight-reducing hole 12.

[0044] Specifically, the value of the diameter D2 of the first arc segment 121 is... The value of the diameter D3 of the second arc segment 123 is... Wherein, D1 is the diameter of the lamination body 1. The first weight-reducing hole 12 with this setting can not only maximize the reduction of the rotor lamination weight, but also effectively prevent the permanent magnet pole 100 from leaking magnetic flux towards the center of the lamination body 1.

[0045] In this embodiment, to further reduce the weight of the lamination body 1, the end face of the lamination body 1 also has a second weight-reducing hole 13, and a second weight-reducing hole 13 is provided between each adjacent first weight-reducing hole 12. Since the first weight-reducing holes 12 correspond one-to-one with the magnet slots 11, and the second weight-reducing holes 13 are provided between adjacent first weight-reducing holes 12, the area between the second weight-reducing holes 13 and the adjacent magnet slots 11 (the area where the silicon steel pole 200 is located) also corresponds, which can prevent the magnetic force at the silicon steel pole 200 from propagating in a straight line towards the center of the lamination body 1, reducing magnetic leakage. At the same time, the second weight-reducing hole 13 can also improve the heat dissipation effect of the rotor lamination.

[0046] Preferably, the second weight-reducing hole 13 is a circular hole, and the center of the circular hole is located at a diameter of On the circle, the diameter D of the circular hole k2 The value is The second weight-reduction hole 13, with this design, can maximize the reduction of the rotor lamination weight and effectively prevent magnetic leakage from the silicon steel electrode 200 towards the center of the lamination body 1. At the same time, the circular second weight-reduction hole 13 is also easy to process and simplifies the manufacturing process.

[0047] In this embodiment, to further optimize the direction of the magnetic field lines, the end face of the lamination body 1 also has a third weight-reducing hole 14. The number of third weight-reducing holes 14 is equal to the number of second weight-reducing holes 13. A third weight-reducing hole 14 is provided between each second weight-reducing hole 13 and the shaft hole 15 of the lamination body 1. The diameter of the third weight-reducing hole 14 is larger than the diameter of the second weight-reducing hole 13. The third weight-reducing hole 14 is located inside the second weight-reducing hole 13 and avoids both the first weight-reducing hole 12 and the second weight-reducing hole 13. Thus, the diameter of the third weight-reducing hole 14 can be configured to be larger than the diameter of the second weight-reducing hole 13, which can maximize the reduction of the weight of the lamination body 1 and reduce magnetic leakage towards the center of the lamination body 1.

[0048] Preferably, the third weight-reducing hole 14 is a circular hole, and the center of the third weight-reducing hole 14 and the center of the second weight-reducing hole 13 are both located on a straight line passing through the center of the lamination body 1. This configuration of the third weight-reducing hole 14 facilitates its fabrication and provides better magnetic shielding, reducing magnetic leakage towards the center of the lamination body 1.

[0049] Preferably, the centers of the plurality of third weight-reducing holes 14 are all located at a diameter of On the circle, it is convenient to make the third weight reduction hole 14, and it also makes the center of mass of the lamination body 1 located at the center, reducing the amount of imbalance, thereby reducing the possibility of eccentricity, suppressing the radial unbalanced magnetic pull caused by eccentricity, and increasing the reliability of motor operation.

[0050] Preferably, the diameter D of the third weight-reducing hole 14 k3 The value is This design can minimize the weight of the rotor laminations and effectively prevent magnetic leakage from the silicon steel pole 200 toward the center of the lamination body 1.

[0051] like Figure 1 As shown, a shaft hole 15 is provided at the center of the lamination body 1 for mounting the motor shaft. The center of the shaft hole 15 coincides with the center of the lamination body 1.

[0052] In this embodiment, the first weight reduction hole 12, the second weight reduction hole 13 and the third weight reduction hole 14 are evenly distributed on the end face of the lamination body 1. In addition to reducing the weight, they can also uniformly dissipate heat in various areas of the lamination body 1, thereby improving the heat dissipation effect of the rotor lamination.

[0053] This embodiment also discloses an electric motor, which includes the unipolar rotor laminations described above. The rotor of the motor is formed by stacking multiple unipolar rotor laminations along the axial direction.

[0054] This embodiment also discloses an intelligent motor, which includes a voice control module and an intelligent control component. In use, the user issues a voice control signal, and the voice control module can recognize the user's voice and control the motor's start and stop via the intelligent control component, making operation simple and convenient.

[0055] In the description herein, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A unipolar rotor lamination, characterized in that, The unipolar rotor lamination includes a lamination body. The end face of the lamination body has at least two magnet slots. The at least two magnet slots are spaced apart along the circumferential direction of the lamination body. The end face of the lamination body has a first weight-reducing hole. The number of the first weight-reducing holes is equal to the number of magnet slots. The first weight-reducing holes are located inside the magnet slots. The first weight-reducing holes are arc-shaped holes that curve toward the center of the lamination body. The first weight-reducing holes are formed by a first arc segment, a left semicircular arc segment, a second arc segment, and a right semicircular arc segment connected in sequence. A plurality of the first weight-reducing holes are spaced apart along the circumferential direction of the lamination body.

2. The unipolar rotor lamination as described in claim 1, characterized in that, Both the first arc segment and the second arc segment are circular arc segments, and the center of the first arc segment and the center of the second arc segment are both located at the center of the lamination body.

3. The unipolar rotor lamination as described in claim 2, characterized in that, The value of the diameter D2 of the first arc segment is The value of the diameter D3 of the second arc segment is Where D1 is the diameter of the lamination body.

4. The unipolar rotor lamination as described in claim 3, characterized in that, The end face of the lamination body also has a second weight reduction hole, and the second weight reduction hole is provided between adjacent first weight reduction holes.

5. The unipolar rotor lamination as described in claim 4, characterized in that, The second weight-reducing hole is a circular hole, and the center of the circular hole is located at a diameter of On the circle, the diameter D of the circular hole k2 The value is 6. The unipolar rotor lamination as described in claim 5, characterized in that, The end face of the lamination body also has a third weight-reducing hole. The number of the third weight-reducing holes is equal to the number of the second weight-reducing holes. Each of the second weight-reducing holes and the shaft hole of the lamination body is provided with a third weight-reducing hole. The diameter of the third weight-reducing hole is larger than the diameter of the second weight-reducing hole.

7. The unipolar rotor lamination as described in claim 6, characterized in that, The third weight-reducing hole is a circular hole, and the center of the third weight-reducing hole and the center of the second weight-reducing hole are both located on a straight line passing through the center of the lamination body.

8. The unipolar rotor lamination as described in claim 7, characterized in that, The centers of the plurality of third weight-reducing holes are all located at a diameter of On the circle.

9. The unipolar rotor lamination as described in claim 7, characterized in that, The diameter D of the third weight-reducing hole k3 The value is 10. An electric motor, characterized in that, The motor includes unipolar rotor laminations as described in any one of claims 1-9.

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