CN219204206U

CN219204206U - Improved permanent magnet generator stator piece capable of reducing cogging torque

Info

Publication number: CN219204206U
Application number: CN202223117731.3U
Authority: CN
Inventors: 周锡甫; 周杰
Original assignee: Zhejiang Xinfa Electric Shares Co ltd
Current assignee: Zhejiang Xinfa Electric Shares Co ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-06-16
Anticipated expiration: 2032-11-23

Abstract

The utility model discloses an improved permanent magnet generator stator sheet capable of reducing cogging torque, which relates to the technical field of stator sheets and comprises a stator sheet body, wherein round holes are formed in the center of the stator sheet body, protrusions in an inverted trapezoid shape are densely distributed on the edges of the round holes, stator grooves are formed between adjacent protrusions, hole grooves are formed in part of the ends of the protrusions, two sides of each hole groove are respectively parallel to the side edges of the adjacent stator grooves, and the size of each hole groove can be maximized under the condition that the size of each protrusion is fixed.

Description

Improved permanent magnet generator stator piece capable of reducing cogging torque

Technical Field

The utility model relates to the technical field of stator sheets, in particular to an improved permanent magnet generator stator sheet capable of reducing cogging torque.

Background

The stator of the motor is an important component part of the motor such as a generator, a starter and the like, the stator is an important part of the motor, the stator consists of a stator iron core, a stator winding and a stand, the main function of the stator is to generate a rotating magnetic field, the main function of the rotor is to be cut by magnetic lines of force in the rotating magnetic field so as to generate current, and the stator winding comprises a stator sheet and a coil wound on the stator sheet;

the utility model discloses a technology for reducing torque of a stator sheet of a permanent magnet generator, which is disclosed in a permanent magnet generator stator sheet capable of reducing cogging torque and a stator sheet for a permanent magnet generator, which is disclosed in patent publication No. CN203014513U and publication No. CN215956134U, and is mainly realized by a mode of forming empty slots among stator slots or reserving the empty slots of the stator, but gaps among the stator slots are limited, and the structure of the reserved empty slots is not suitable for a magnetic pole change process, so that the capability of the generator stator sheet for reducing torque fluctuation, vibration and noise of the generator is limited, and the technical bottleneck is achieved.

Disclosure of Invention

The present utility model is directed to an improved permanent magnet generator stator sheet capable of reducing cogging torque, so as to solve the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a can reduce improvement formula permanent magnet generator stator piece of tooth's socket torque, includes the stator piece body, stator piece body center is provided with the circle hole, the protruding that is the trapezoid shape is densely arranged in circle hole edge, adjacent be formed with the stator groove between the protruding, part protruding tip is provided with the hole groove, two limits in hole groove are parallel with adjacent stator groove side respectively, can maximize the size in hole groove under the certain circumstances of protruding size.

Preferably, the protrusion may be divided into a standard part and an extension part, the extension part being an integer multiple of the standard part, and the stator slot is provided on the extension part to increase the air gap space.

Preferably, the stator slot can be divided into a large slot and a small slot, the large slot and the small slot are different in size, the large slot and the small slot are distributed in a central symmetry mode with respect to the circle center of the stator piece body, winding is convenient, and more winding combinations can be allowed to improve the efficiency of the generator.

Preferably, the distance between the hole groove and the adjacent stator groove is between 0.45mm and 1mm, so that the structural strength is ensured, and the space of the hole groove is maximized.

Preferably, the hole slot is centrally arranged on one side of the protrusion towards the central axis of the stator plate body, so that the air gap space of the generator winding can be increased.

Preferably, a plurality of opening grooves are distributed on the outer edge of the stator piece body around the circle center at equal intervals, and the number of the opening grooves is at least 3, so that the stator piece body is balanced in stress.

The utility model has the technical effects and advantages that:

(1) The utility model increases the air gap space of the generator winding by using the hole slots on the protrusions, can play a role in assisting the static magnetic energy change of the generator when the rotor rotates, and the protrusions are in an inverted trapezoid shape, and the two sides of each hole slot are respectively parallel to the side edges of the adjacent stator slots, so that the size of each hole slot can be maximized under the condition that the size of each protrusion is fixed, and the purposes of greatly reducing the torque fluctuation, vibration and noise of the generator are realized;

(2) According to the utility model, the bulges with different sizes can be arranged, the small-size bulges are not provided with the hole grooves, and the large-size bulges are provided with the hole grooves, so that compared with the mode of reserving the stator empty slots, the purpose of reducing torque fluctuation, vibration and noise of the generator can be better achieved;

(3) The utility model can be provided with stator slots with different sizes, which are respectively used for limiting a low-voltage coil with smaller radius and a high-voltage coil with larger radius, thereby effectively reducing magnetic loss, saving copper wire materials, reducing heat and improving the working efficiency of the generator.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present utility model;

FIG. 2 is an enlarged view of the structure A of FIG. 1 according to the present utility model;

FIG. 3 is a partial sectional view of embodiment 2 of the present utility model;

fig. 4 is a partial structural sectional view of embodiment 3 of the present utility model.

In the figure: 1. a stator sheet body; 11. a round hole; 12. a protrusion; 121. a standard part; 122. an extension; 13. a stator groove; 131. a large groove; 132. a small groove; 14. a hole groove; 15. and (5) opening grooves.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment 1 of the utility model provides an improved permanent magnet generator stator sheet capable of reducing cogging torque, as shown in fig. 1 and 2, comprising a stator sheet body 1, wherein a circular hole 11 is arranged in the center of the stator sheet body 1, protrusions 12 in an inverted trapezoid shape are densely distributed on the edges of the circular hole 11, stator grooves 13 are formed between adjacent protrusions 12, hole grooves 14 are formed at part of the ends of the protrusions 12, two sides of each hole groove 14 are respectively parallel to the adjacent stator grooves 13, the distance between each hole groove 14 and each adjacent stator groove 13 is 0.5-1 mm, the hole grooves 14 are centrally arranged on one side, facing the central axis of the stator sheet body 1, of each protrusion 12, a plurality of opening grooves 15 are distributed on the outer edge of the stator sheet body 1 at equal intervals around the center of the circle, and the number of the opening grooves 15 is at least 3;

in this embodiment, the protrusions 12 are in an inverted trapezoid shape, and two sides of the hole groove 14 are parallel to the sides of the adjacent stator groove 13, so that the size of the hole groove 14 can be maximized under the condition that the size of the protrusions 12 is fixed, and the purpose of greatly reducing torque fluctuation, vibration and noise of the generator is achieved.

The embodiment 2 of the utility model provides an improved permanent magnet generator stator sheet capable of reducing cogging torque, as shown in fig. 3, comprising a stator sheet body 1, wherein round holes 11 are formed in the center of the stator sheet body 1, protrusions 12 in an inverted trapezoid shape are densely distributed at the edges of the round holes 11, stator grooves 13 are formed between adjacent protrusions 12, hole grooves 14 are formed at part of the ends of the protrusions 12, two sides of each hole groove 14 are respectively parallel to the adjacent stator grooves 13, each protrusion 12 is divided into a standard part 121 and an extension part 122, the extension parts 122 are integral multiples of the standard parts 121, the stator grooves 13 are arranged on the extension parts 122, the distance between each hole groove 14 and each adjacent stator groove 13 is 0.5-1 mm, each hole groove 14 is centrally arranged at one side of each protrusion 12 facing the central axis of the stator sheet body 1, a plurality of opening grooves 15 are uniformly distributed around the outer edge of the stator sheet body 1, and the number of the opening grooves 15 is at least 3;

in this embodiment, the protrusions 12 with different sizes are provided, the small-sized protrusions 12 are not provided with the hole grooves 14, and the large-sized protrusions 12 are provided with the hole grooves 14, so that the torque fluctuation, vibration and noise of the generator can be reduced better than the mode of reserving the stator empty slots.

The embodiment 3 of the utility model provides an improved permanent magnet generator stator sheet capable of reducing cogging torque, as shown in fig. 4, comprising a stator sheet body 1, wherein round holes 11 are arranged in the center of the stator sheet body 1, protrusions 12 in an inverted trapezoid shape are densely distributed at the edges of the round holes 11, stator grooves 13 are formed between adjacent protrusions 12, hole grooves 14 are formed at part of the ends of the protrusions 12, two sides of each hole groove 14 are respectively parallel to the adjacent stator grooves 13, the stator grooves 13 are divided into large grooves 131 and small grooves 132, the large grooves 131 and the small grooves 132 are different in size, the large grooves 131 and the small grooves 132 are distributed in a central symmetry mode with respect to the center of the stator sheet body 1, the distance between each hole groove 14 and each adjacent stator groove 13 is between 0.5mm and 1mm, the hole grooves 14 are centrally arranged at one side, facing the center axis of the stator sheet body 1, a plurality of opening grooves 15 are equidistantly distributed around the center of the periphery of the stator sheet body 1, and the number of the opening grooves 15 is at least 3;

in this embodiment, stator slots 13 with different sizes are provided, and are respectively used for limiting a low-voltage coil with a smaller radius and a high-voltage coil with a larger radius, so that magnetic loss can be effectively reduced, copper wire materials can be saved, heating can be reduced, and the working efficiency of the generator can be improved.

The working principle of the utility model is as follows: the use of the slots 14 in the bosses 12 to increase the air gap space of the generator windings can assist in the variation of the static magnetic energy of the generator as the rotor rotates.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a can reduce improvement formula permanent magnet generator stator piece of cogging torque, includes stator piece body (1), stator piece body (1) center is provided with round hole (11), its characterized in that, round hole (11) edge is densely arranged and is protruding (12) of falling trapezoid shape, adjacent be formed with stator groove (13) between protruding (12), part protruding (12) tip is provided with hole groove (14), two limits of hole groove (14) are parallel with adjacent stator groove (13) respectively.

2. An improved permanent magnet generator stator according to claim 1, wherein the protrusions (12) are divided into standard portions (121) and extension portions (122), the extension portions (122) being integer multiples of the standard portions (121), the stator slots (13) being provided on the extension portions (122).

3. The improved permanent magnet generator stator piece capable of reducing cogging torque according to claim 1, wherein the stator slot (13) is divided into a large slot (131) and a small slot (132), the large slot (131) and the small slot (132) are different in size, and the large slot (131) and the small slot (132) are distributed in a central symmetry manner with respect to the center of the stator piece body (1).

4. An improved permanent magnet generator stator piece with reduced cogging torque according to claim 1, characterized in that the spacing between the hole slots (14) and adjacent stator slots (13) is between 0.5mm and 1 mm.

5. An improved permanent magnet generator stator according to claim 1, characterized in that the slot (14) is centrally arranged on the side of the protrusion (12) facing the centre axis of the stator piece body (1).

6. The improved permanent magnet generator stator piece capable of reducing cogging torque according to claim 1, wherein a plurality of notch grooves (15) are distributed on the outer edge of the stator piece body (1) at equal intervals around the circle center, and the number of the notch grooves (15) is at least 3.