Large-torque motor

Abstract

The utility model relates to the technical field of motors, and particularly discloses a large-torque motor which comprises a stator assembly and a rotor assembly. The stator assembly comprises a stator punching sheet. The periphery of the stator punching sheet is uniformly provided with a plurality of winding grooves around the center of the stator punching sheet. The rotor assembly comprises a plurality of magnets which are uniformly arranged around the stator punching sheet; the number of the winding grooves is 15, and the number of the magnets is 14 or 16. Or, the number of the winding grooves is 18, and the number of the magnets is 14, 16, 18, 20 or 22; or, the number of the winding grooves is 24, and the number of the magnets is 20, 22, 24, 26 or 28. According to the utility model, the maximum torque of the motor is improved through reasonable matching of the winding grooves and the magnets.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially a motor of big torque. BACKGROUND

[0002] Motor is according to electromagnetic induction law realizes electric energy conversion or transmission a kind of electromagnetic device, in the application of industry has been very extensive.The traditional three-phase motor includes stator assembly and rotor assembly, and the stator assembly includes stator lamination, and the stator lamination has the winding slot for winding, and the rotor assembly includes a plurality of magnets.The existing motor, the ratio of winding slot and magnet quantity is unreasonable, and the maximum torque of motor is difficult to improve. SUMMARY

[0003] The utility model provides a motor of big torque, through the reasonable ratio of winding slot and magnet, improves the maximum torque of motor.

[0004] To solve the above problem, the utility model adopts the following technical scheme:

[0005] The embodiment of the utility model provides a motor of big torque, including stator assembly and rotor assembly;The stator assembly includes stator lamination, and the outer periphery of the stator lamination is evenly provided with a plurality of winding slots around the center;The rotor assembly includes a plurality of magnets evenly arranged around the stator lamination;The number of winding slots is 15, and the number of magnets is 14 or 16;Or, the number of winding slots is 18, and the number of magnets is 14, 16, 18, 20 or 22;Or, the number of winding slots is 24, and the number of magnets is 20, 22, 24, 26 or 28.

[0006] In some embodiments, the winding slot includes a receiving portion and an opening portion, the receiving portion and the opening portion are distributed from inside to outside along the radial direction, and the receiving portion and the opening portion are connected to each other, and the width of the opening portion is less than the width of the receiving portion.

[0007] In some embodiments, the receiving portion has a bottom wall close to the center of the stator lamination, two first side walls, and two top walls close to the opening portion, and the opening portion has two second side walls;The two sides of the bottom wall are connected to the two first side walls respectively, one end of the two top walls is connected to the two first side walls respectively, the other end of the two top walls is connected to the two second side walls respectively, and the two second side walls are connected to the outer peripheral surface of the stator lamination.

[0008] In some embodiments, the two first side walls are arranged along the radial direction of the stator lamination, and the two second side walls are arranged parallel to each other.

[0009] In some embodiments, the included angle between the two first side walls is 20°, and the included angle between the first side wall and the top wall connected thereto is 90°.

[0010] In some embodiments, the radius of the bottom wall is 34.95-35.05mm, the distance from the bottom wall to the top wall is 19.70-19.80mm, the distance from the top wall to the outer circumferential surface of the stator lamination is 0.7-0.9mm, and the distance between the two second side walls is 3.95-4.05mm.

[0011] In some embodiments, the bottom wall is connected to the first side wall with a chamfered corner, the first side wall is connected to the top wall with a chamfered corner, the top wall is connected to the second side wall with a chamfered corner, and the second side wall is connected to the outer circumferential surface of the stator lamination with a chamfered corner.

[0012] In some embodiments, the rotor assembly comprises a rotor connecting plate, and the magnet is fixed to the inner side surface of the rotor connecting plate.

[0013] In some embodiments, the outer diameter of the rotor connecting plate is 126mm, the inner diameter is 113mm, and the outer diameter of the stator lamination is 112mm.

[0014] In some embodiments, the number of winding grooves is 18, and the number of magnets is 20.

[0015] The utility model has at least the following beneficial effects: the number of winding grooves of the utility model is 15, and the number of magnets is 14 or 16; or, the number of winding grooves is 18, and the number of magnets is 14, 16, 18, 20 or 22; or, the number of winding grooves is 24, and the number of magnets is 20, 22, 24, 26 or 2; through experiment demonstration, the matching of the winding groove and the magnet is more reasonable, and the maximum torque of the motor can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a stator assembly and a rotor assembly according to an embodiment of the utility model;

[0017] Figure 2 FIG. 2 is a structural schematic diagram of a stator assembly according to an embodiment of the utility model;

[0018] Figure 3 FIG. 3 is a structural schematic diagram of a rotor assembly according to an embodiment of the utility model;

[0019] Figure 4 FIG. 4 is a partial structural schematic diagram of a stator lamination according to an embodiment of the utility model;

[0020] Figure 5 FIG. 5 is a sectional view of the rotor assembly shown in FIG. 3 along the A-A sectional line. Figure 3

[0021] In the drawings, the reference signs are as follows: ​

[0022] Stator assembly 10, stator lamination 100, winding slot 110, accommodating portion 120, bottom wall 121, first side wall 122, top wall 123, opening portion 130, second side wall 131;

[0023] Rotor assembly 20, magnet 210, rotor connecting plate 220, accommodating groove 221, center hole 222. DETAILED DESCRIPTION

[0024] The present application provides the following description with reference to the accompanying drawings to help comprehensively understand various embodiments of the present application as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be considered only as exemplary. Therefore, those skilled in the art will recognize various changes and modifications to the various embodiments described herein without departing from the scope and spirit of the present application.

[0025] In the description of the present application, the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] It should be understood that when one element (e.g., a first element) is "connected" to another element (e.g., a second element), the element can be directly connected to the other element, or there can be an intervening element (e.g., a third element) between the element and the other element.

[0027] The embodiment of the present application provides a motor with large torque, as shown in the figure, comprising a stator assembly 10 and a rotor assembly 20. The stator assembly 10 comprises a stator lamination 100, and the stator lamination 100 can be disc-shaped. A plurality of winding slots 110 are uniformly arranged around the center of the stator lamination 100. The winding slots 110 are used to wind the stator coil. The rotor assembly 20 comprises a plurality of magnets 210 uniformly arranged around the stator lamination 100. The magnets 210 are centered on the center of the stator lamination 100 and are uniformly distributed in the circumferential direction, forming an outer rotor motor structure. Figures 1-3 The number of winding slots 110 in the embodiment is a multiple of 3, and the number of magnets 210 is a multiple of 2. When the number of winding slots 110 is 15, the number of magnets 210 is 14 or 16. When the number of winding slots 110 is 18, the number of magnets 210 is 14, 16, 18, 20 or 22. When the number of winding slots 110 is 24, the number of magnets 210 is 20, 22, 24, 26 or 28.

[0028] ​

[0029] The following groups of specific embodiments are provided:

[0030] (1) the number of wire grooves 110 is 15, and the number of magnets 210 is 14;

[0031] (2) the number of wire grooves 110 is 15, and the number of magnets 210 is 16;

[0032] (3) the number of wire grooves 110 is 18, and the number of magnets 210 is 14;

[0033] (4) the number of wire grooves 110 is 18, and the number of magnets 210 is 16;

[0034] (5) the number of wire grooves 110 is 18, and the number of magnets 210 is 18;

[0035] (6) the number of wire grooves 110 is 18, and the number of magnets 210 is 20;

[0036] (7) the number of wire grooves 110 is 18, and the number of magnets 210 is 22;

[0037] (8) the number of wire grooves 110 is 24, and the number of magnets 210 is 20;

[0038] (9) the number of wire grooves 110 is 24, and the number of magnets 210 is 22;

[0039] (10) the number of wire grooves 110 is 24, and the number of magnets 210 is 24;

[0040] (11) the number of wire grooves 110 is 24, and the number of magnets 210 is 26;

[0041] (12) the number of wire grooves 110 is 24, and the number of magnets 210 is 28.

[0042] In order to illustrate the beneficial effects of the present application, the following groups of experimental data will be provided. Among them, the input voltage of each group of experiments is 220V, the rated speed is 180rpm, and the rated current is 0.65A.

[0043]

[0044] In the above experiment, the maximum torque of the motor in the 2nd-5th group, the 11th-14th group and the 17th-18th group is obviously greater than that of other groups, and is in the range of 4.7-5.3, which has the characteristic of large torque. Among them, the 12th group, i.e., the number of winding grooves 110 is 18 and the number of magnets 210 is 20, the maximum torque can reach 5.00 N.m, and the working state is stable, which is the best ratio of winding grooves 110 and magnets 210, and the motors of the 13th group, the 17th group and the 18th group are weaker than the motor of the 12th group in stability.

[0045] Therefore, the ratio of the winding groove 110 and the magnet 210 of the embodiment is more reasonable, which can improve the maximum torque of the motor.

[0046] In some embodiments, as shown in Figure 4 The winding groove includes a receiving portion 120 and an opening portion 130, which are distributed from inside to outside along the radial direction of the stator lamination, and the receiving portion 120 and the opening portion 130 are connected to each other, and the opening portion 130 is opened at the outer circumferential surface of the stator lamination. The width of the opening portion 130 is smaller than that of the receiving portion 120, and the opening portion 130 plays a role of closing, which can limit the coil from separating from the winding groove, so that the coil is tightly wound in the winding groove.

[0047] Further, the receiving portion 120 has a bottom wall 121 close to the center of the stator lamination, two first side walls 122 and two top walls 123 close to the opening portion 130, and the opening portion 130 has two second side walls 131; the two sides of the bottom wall 121 are connected to the two first side walls 122 respectively, one end of the two top walls 123 is connected to the two first side walls 122 respectively, the other end of the two top walls 123 is connected to the two second side walls 131 respectively, and the two second side walls 131 are connected to the outer circumferential surface of the stator lamination. The receiving portion 120 is substantially in the shape of a sector, and the opening portion 130 is substantially in the shape of a straight slot.

[0048] Further, the two first side walls 122 are arranged along the radial direction of the stator lamination, so that the distance between the two first side walls 122 gradually increases in the direction from inside to outside along the radial direction of the stator lamination. The two second side walls 131 are arranged parallel to each other, and the distance between the two second side walls 131 remains unchanged in the radial direction of the stator lamination.

[0049] In some embodiments, the included angle a between the two first side walls 122 is 20°, and the included angle b between the first side wall 122 and the top wall 123 connected thereto is 90°, which limits the shape of the receiving portion 120 to be relatively regular.

[0050] In some embodiments, the radius R of the bottom wall 121 is 34.95-35.05 mm, preferably 35.00 mm, the distance L from the bottom wall 121 to the top wall 123 is 19.70-19.80 mm, preferably 19.75 mm, the distance S from the top wall 123 to the outer circumferential surface of the stator lamination is 0.7-0.9 mm, preferably 0.8 mm, and the distance d between the two second side walls 131 is 3.95-4.05 mm, preferably 4.00 mm. These dimensions define a winding slot distribution that is more uniform and easier to achieve 18 winding slots.

[0051] Further, the distance between two adjacent winding slots can be 4.55-4.65 mm, so that the distance between the winding slots remains relatively appropriate.

[0052] In some embodiments, the bottom wall 121 is connected to the first side wall 122 with a rounded corner, the first side wall 122 is connected to the top wall 123 with a rounded corner, the top wall 123 is connected to the second side wall 131 with a rounded corner, and the second side wall 131 is connected to the outer circumferential surface of the stator lamination with a rounded corner, which makes the connection position smoother and easier to demold after casting.

[0053] In some embodiments, as shown in Figure 3 and Figure 5 The rotor assembly further includes a rotor connecting plate 220, and the magnets 210 are fixed to the inner side of the rotor connecting plate 220 so that the relative positions of the magnets 210 remain fixed.

[0054] Further, the bottom surface of the rotor connecting plate 220 has an inner recessed accommodation groove 221, which can install a bearing to increase the smoothness and stability of the rotation of the rotor connecting plate 220, and the accommodation groove 221 is provided with a central hole 222 that penetrates the rotor connecting plate 220, and the output shaft of the motor passes through the central hole 222 and is connected to the rotor connecting plate 220.

[0055] In some embodiments, as shown in Figure 3 The outer diameter R1 of the rotor connecting plate 220 is 126 mm, and the inner diameter R2 is 113 mm. As shown in Figure 2 The outer diameter of the stator lamination 100 is 112 mm. The rotor and stator of such dimensions are more suitable for the winding slot and magnet ratio of the above-mentioned embodiments.

[0056] The terms and words used in the above description and claims are not limited to the literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present application. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the present application is provided only for illustration, not for limitation, as defined by the appended claims and their equivalents.

Claims

1. A large torque motor characterized by: The motor comprises a stator assembly and a rotor assembly; the stator assembly comprises a stator lamination, and a plurality of winding slots are uniformly arranged around the center of the stator lamination; the rotor assembly comprises a plurality of magnets which are uniformly arranged around the stator lamination; the number of the winding slots is 15, and the number of the magnets is 14 or 16; or the number of the winding slots is 18, and the number of the magnets is 14, 16, 18, 20 or 22; or the number of the winding slots is 24, and the number of the magnets is 20, 22, 24, 26 or 28.

2. The large torque motor of claim 1, wherein: The winding slot comprises a receiving portion and an opening portion, the receiving portion and the opening portion are distributed from inside to outside along the radial direction, and the receiving portion and the opening portion are connected to each other, and the width of the opening portion is smaller than that of the receiving portion.

3. The large torque motor of claim 2, wherein: The receiving portion has a bottom wall close to the center of the stator lamination, two first side walls and two top walls close to the opening portion, and the opening portion has two second side walls; the two sides of the bottom wall are connected to the two first side walls respectively, one end of the two top walls is connected to the two first side walls respectively, the other end of the two top walls is connected to the two second side walls respectively, and the two second side walls are connected to the outer circumferential surface of the stator lamination.

4. The large torque motor of claim 3, wherein: The two first side walls are arranged along the radial direction of the stator lamination, and the two second side walls are arranged parallel to each other.

5. The large torque motor of claim 4, wherein: The included angle between the two first side walls is 20°, and the included angle between the first side wall and the top wall connected thereto is 90°.

6. The large torque motor of claim 4, wherein: The radius of the bottom wall is 34.95-35.05 mm, the distance from the bottom wall to the top wall is 19.70-19.80 mm, the distance from the top wall to the outer circumferential surface of the stator lamination is 0.7-0.9 mm, and the distance between the two second side walls is 3.95-4.05 mm.

7. The large torque motor of claim 3, wherein: The bottom wall and the first side wall are connected by a rounded corner, the first side wall and the top wall are connected by a rounded corner, the top wall and the second side wall are connected by a rounded corner, and the second side wall and the outer circumferential surface of the stator lamination are connected by a rounded corner.

8. A high torque motor according to any one of claims 1-7, characterized in that: The rotor assembly comprises a rotor connecting plate, and the magnets are fixed to the inner side surface of the rotor connecting plate.

9. A large torque motor according to claim 8, characterized in that: The outer diameter of the rotor connecting plate is 126 mm, the inner diameter is 113 mm, and the outer diameter of the stator lamination is 112 mm.

10. A high torque motor according to any one of claims 1 to 7, characterised in that: The number of the winding slots is 18, and the number of the magnets is 20.

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