Permanent magnet stator structure with high slot space factor

Abstract

The utility model relates to the technical field of permanent magnet stators, in particular to a permanent magnet stator structure with a high slot space factor, which comprises a stator main body, a plurality of stator teeth are annularly distributed on the inner ring of the stator main body, two sides of the bottom end of each stator tooth extend outwards to form a stator shoe, a stator slot is formed between two adjacent stator teeth, and the stator shoe is arranged in the stator slot. The bottom surface of each stator groove is a straight line segment with the two ends equidistant, and the angle between the straight line segment and the stator teeth on the two sides is 90 degrees. The two sides of the stator slot bottom are straight-line segments and form 90 degrees with the tooth parts, the length of the straight-line segments of the tooth parts is increased, the distance between the straight-line segments of the stator tooth parts is increased, the slot fullness rate is improved, and the motor stack thickness and cost are reduced under the same output power.

Description

TECHNICAL FIELD

[0001] The utility model relates to permanent magnet stator technical field especially relates to a permanent magnet stator structure of high slot fill factor. BACKGROUND

[0002] Permanent magnet motor utilizes permanent magnet (permanent magnet) to produce constant magnetic field, so that the electromagnetic excitation device (such as armature winding) needed in traditional motor can be saved. It is mainly composed of two parts, rotor: permanent magnet is installed, and magnetic field is formed. Stator: install winding, and rotate magnetic field is generated through electrification, and the magnetic field of rotor is interacted, and the rotation of motor is realized.

[0003] The slot bottom of the stator punching sheet in the existing permanent magnet motor is arc-shaped, which is not conducive to the improvement of slot fill factor, therefore, the permanent magnet stator structure of high slot fill factor is proposed to solve the above problems. SUMMARY

[0004] The utility model discloses a permanent magnet stator structure of high slot fill factor to solve the problem that the slot bottom of the stator punching sheet in the existing permanent magnet motor is arc-shaped, which is not conducive to the improvement of slot fill factor.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A permanent magnet stator structure of high slot fill factor, including the stator main part, the inner circle of stator main part annular distribution has a plurality of stator teeth, and the bottom end both sides of each stator tooth extend outward and form stator shoe, and the stator slot is formed between adjacent two stator teeth, and the bottom surface of stator slot is straight line segment with equal distance at both ends, and the angle between straight line segment and both sides stator tooth is 90 DEG.

[0007] As a preferred technical scheme of the utility model, the bottom of stator shoe is provided with a chamfer, and the included angle between the two chamfers on adjacent two stator shoes is 121.8 DEG.

[0008] As a preferred technical scheme of the utility model, the two straight line segments on the bottom surface of stator slot are arc-shaped transition.

[0009] As a preferred technical scheme of the utility model, four positioning grooves are equidistantly arranged on the arc-shaped outer wall of the stator main body, and positioning is carried out when the stator punching sheet is stacked.

[0010] The utility model has the advantages of:

[0011] The two sides of the stator slot bottom are straight line segments and form 90 DEG with the tooth part, the length of the straight line segment of the tooth part is increased, the straight line segment distance of the stator tooth part is increased to improve the slot fill factor, and the motor stack thickness and cost are reduced at the same output power. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 A structure diagram of a high-slot-full permanent magnet stator structure is provided in the utility model.

[0013] Figure 2 To Figure 1 The structure diagram at A in the middle.

[0014] In the drawing: 1, stator main body; 12, stator tooth; 121, stator shoe, 122, cutting angle; 13, stator slot; 131, straight line segment. Specific implementation

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0016] Referring to Figures 1-2 A high-slot-full permanent magnet stator structure, comprising a stator main body 1, a plurality of stator teeth 12 are arranged in a ring shape on the inner circle of the stator main body 1, the bottom end of each stator tooth 12 extends outward to form a stator shoe 121 on both sides, a cutting angle 122 is arranged at the bottom of the stator shoe 121, and the included angle between the two cutting angles 122 on the two stator shoes 121 is 121.8°.

[0017] Among them, the stator slot 13 is formed between the two adjacent stator teeth 12, the bottom surface of the stator slot 13 is a straight line segment 131 with equal distance at both ends, the two straight line segments 131 on the bottom surface of the stator slot 13 are arc-shaped transition, the angle between the straight line segment 131 and the two stator teeth 12 is 90°, and the length of the inner wall of the stator tooth 12 is increased.

[0018] Secondly, four positioning grooves are equidistantly arranged on the arc-shaped outer wall of the stator main body 1, and the positioning is performed when the stator punching sheet is stacked.

[0019] In the embodiment: the two sides of the bottom of the stator slot 13 are straight line segments and form an angle of 90° with the stator tooth 12, the length of the inner wall of the stator tooth 12 is increased, so that the slot fullness is improved, the efficiency is improved compared with the arc slot bottom, and the motor thickness and cost are reduced at the same output power.

[0020] The above is only a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A high-slot-fill permanent magnet stator structure, comprising a stator body (1), a plurality of stator teeth (12) are annularly distributed on the inner circle of the stator body (1), and a stator shoe (121) is formed by extending outward on both sides of the bottom end of each stator tooth (12), characterized in that, The stator slot (13) is formed between two adjacent stator teeth (12), the bottom of the stator slot (13) is a straight line segment (131) with equal distance from both ends, and the angle between the straight line segment (131) and the two side stator teeth (12) is 90°; The bottom of the stator shoe (121) is provided with a chamfer (122), and the included angle between the two chamfers (122) on the two adjacent stator shoes (121) is 121.8°. The two straight line segments (131) on the bottom of the stator slot (13) are arc-shaped.

2. A high slot fill permanent magnet stator structure according to claim 1, wherein, Four positioning grooves are equidistantly arranged on the arc-shaped outer wall of the stator body (1).

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