CN214479888U

CN214479888U - A motor stator and hub motor

Info

Publication number: CN214479888U
Application number: CN202120412449.4U
Authority: CN
Inventors: 王永生; 姜亚军; 刘刚; 韦士富
Original assignee: Yadea Technology Group Co Ltd
Current assignee: Yadea Technology Group Co Ltd
Priority date: 2021-02-24
Filing date: 2021-02-24
Publication date: 2021-10-22
Anticipated expiration: 2031-02-24

Abstract

The utility model relates to the technical field of electric machines, especially, relate to a motor stator and in-wheel motor, it includes stator core and winding, stator core includes stator yoke ring and a plurality of stator teeth that set up along the periphery wall circumference interval of stator yoke ring, the addendum outer wall of every stator tooth is the arc curved surface, the arc curved surface is the circular arc along the radial cross-section perpendicular to stator core the central axis, the arc curved surface sets up about the symmetry plane symmetry, the symmetry plane is the plane that the center of circular arc and the central axis of stator yoke ring formed, the radius of circular arc is less than the biggest external diameter of stator core; the winding is wound on the stator teeth, and the winding wound on each stator tooth is in the same direction as the winding wound on the two adjacent stator teeth and in the different direction from the winding wound on the other stator tooth. The utility model discloses a make arc curved surface and stator yoke ring decentraction to make the motor have the advantage that the highest efficiency is high, the torque is undulant low.

Description

Motor stator and in-wheel motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a motor stator and in-wheel motor.

Background

The hub motor has the advantages of simple structure, reliable operation, convenient adaptation to different frames and very wide application in the field of two-wheeled electric vehicles. However, the hub motor works in a direct-drive mode with low speed and high torque, the highest efficiency and high-efficiency interval proportion of the motor is low, the torque fluctuation is high, and the riding experience of a user is influenced by the overhigh torque fluctuation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor stator and in-wheel motor has great maximum efficiency and lower torque ripple.

To achieve the purpose, the utility model adopts the following technical proposal:

a motor stator comprises a stator core, wherein the stator core comprises a stator yoke ring and a plurality of stator teeth which are circumferentially arranged along the outer peripheral wall of the stator yoke ring at intervals, the outer wall of the tooth crest of each stator tooth is an arc-shaped curved surface, the arc-shaped curved surface is an arc along the radial section which is perpendicular to the central axis of the stator core, the arc-shaped curved surfaces are symmetrically arranged relative to a symmetrical plane, the symmetrical plane is a plane formed by the center of the arc and the central axis of the stator yoke ring, and the radius of the arc is smaller than the maximum outer diameter of the stator core; the winding is wound on the stator teeth, and the winding wound on each stator tooth and the winding wound on two adjacent stator teeth are in the same direction and in different directions.

Preferably, the radius of the circular arc is 12mm to 100 mm.

Preferably, the outer diameter of the stator core is greater than 190mm and less than 220 mm.

Preferably, the axial thickness of the stator core is 15mm to 50 mm.

Preferably, the inner diameter of the stator yoke ring is larger than 70mm and smaller than 90 mm.

Preferably, the number of the stator teeth is 48, and the width of the stator teeth is 4mm-8 mm.

An in-wheel motor comprises the motor stator.

Preferably, the in-wheel motor further includes a rotor that is sleeved outside the stator core and is rotatable with respect to the stator core.

Preferably, the rotor includes rotor core and glues and locate the magnet steel of rotor core internal perisporium, the magnet steel is 56, and is a plurality of the magnet steel is followed rotor core circumference sets gradually.

Preferably, the outer diameter of the rotor core is 210mm to 240 mm.

The utility model has the advantages that: the utility model discloses a set up the arc curved surface at the addendum outer wall of stator tooth, the arc curved surface is the circular arc along the radial cross section of perpendicular to stator core the central axis, and the arc curved surface sets up about the symmetry plane symmetry, and the symmetry plane is the plane that the central axis of the center of circular arc and stator yoke ring formed, and the radius of circular arc is less than stator core's the biggest external diameter, makes arc curved surface and stator yoke ring disalignment to make the motor have the advantage that the maximum efficiency is high, the torque is undulant low.

Drawings

Fig. 1 is a schematic structural diagram of a motor stator provided by the present invention;

fig. 2 is an enlarged view at a in fig. 1.

In the figure:

1. a stator yoke ring; 2. stator teeth; 21. an arc-shaped curved surface.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

As shown in fig. 1-2, the present embodiment provides a motor stator, including a stator core and a winding, where the stator core includes a stator yoke ring 1 and a plurality of stator teeth 2 circumferentially arranged along an outer circumferential wall of the stator yoke ring 1 at intervals, an outer wall of a tooth crest of each stator tooth 2 is an arc-shaped curved surface 21, a radial cross section of the arc-shaped curved surface 21 perpendicular to a central axis of the stator core is an arc, the arc-shaped curved surface 21 is symmetrically arranged with respect to a symmetry plane, the symmetry plane is a plane formed by a center of the arc and the central axis of the stator yoke ring 1, and a radius of the arc is smaller than a maximum outer diameter of the stator core; the winding is wound on the stator teeth 2, and the winding wound on each stator tooth 2 is in the same direction as the winding wound on the two adjacent stator teeth 2 and is in the same direction as the other winding.

This embodiment sets up arc curved surface 21 through the top outer wall at stator tooth 2, and arc curved surface 21 is the circular arc along the radial cross-section of perpendicular to stator core the central axis, and arc curved surface 21 sets up about the symmetry plane symmetry, and the symmetry plane is the plane that the center of circular arc and the central axis of stator yoke ring 1 formed, and the radius of circular arc is less than stator core's maximum external diameter, makes arc curved surface 21 and stator yoke ring 1 disalignment to make the motor have the advantage that the highest efficiency is high, the torque is undulant low.

Specifically, the winding directions of the windings wound on two adjacent stator teeth 2 are opposite.

Specifically, the radius of the arc-shaped curved surface 21 is 12mm-100mm, the outer diameter of the stator core is more than 190mm and less than 220mm, and the radius of the arc-shaped curved surface 21 is less than the outer diameter of the stator core.

More specifically, in the present embodiment, the stator core adopts a winding process, and the axial thickness of the stator core is 15mm to 50 mm.

Specifically, the inner diameter of the stator yoke ring 1 is larger than 70mm and smaller than 90 mm. More specifically, the width of the stator teeth 2 is 4mm-8 mm.

The embodiment also provides an in-wheel motor, including as above motor stator and rotor, the rotor cover is located outside the stator core and can rotate for the stator core.

Specifically, the rotor comprises a rotor core and magnetic steel adhered to the inner peripheral wall of the rotor core, wherein the outer diameter of the rotor core is 210mm-240mm, and the thickness of the magnetic steel is 15mm-50 mm. More specifically, in the present embodiment, there are 48 stator teeth 2 and 56 magnetic steels, and the plurality of magnetic steels are sequentially arranged along the circumferential direction of the rotor core.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A motor stator comprises a stator core and a winding, and is characterized in that the stator core comprises a stator yoke ring (1) and a plurality of stator teeth (2) arranged along the circumferential direction of the outer circumferential wall of the stator yoke ring (1) at intervals, the outer wall of the tooth top of each stator tooth (2) is an arc-shaped curved surface (21), the radial section of each arc-shaped curved surface (21) perpendicular to the central axis of the stator core is an arc, the arc-shaped curved surfaces (21) are symmetrically arranged relative to a symmetrical plane, the symmetrical plane is a plane formed by the center of the arc and the central axis of the stator yoke ring (1), and the radius of the arc is smaller than the maximum outer diameter of the stator core;

the winding is wound on the stator teeth (2), and the winding wound on each stator tooth (2) and the winding wound on two adjacent stator teeth (2) are in the same direction and in different directions.

2. The electric machine stator of claim 1, wherein the radius of the arc is 12mm-100 mm.

3. The electric machine stator of claim 1, wherein the stator core has an outer diameter greater than 190mm and less than 220 mm.

4. The electric machine stator of claim 1, wherein the axial thickness of the stator core is 15mm-50 mm.

5. A stator for an electric machine according to claim 1, characterized in that the inner diameter of the stator yoke ring (1) is larger than 70mm and smaller than 90 mm.

6. The stator according to claim 1, characterized in that the number of the stator teeth (2) is 48, and the width of the stator teeth (2) is 4mm-8 mm.

7. An in-wheel motor comprising a motor stator according to any one of claims 1 to 6.

8. The in-wheel motor of claim 7, further comprising a rotor sleeved outside the stator core and rotatable relative to the stator core.

9. The in-wheel motor according to claim 8, wherein the rotor includes a rotor core and 56 magnetic steels adhered to an inner peripheral wall of the rotor core, and the plurality of magnetic steels are sequentially arranged along a circumferential direction of the rotor core.

10. The in-wheel motor of claim 9, wherein the rotor core has an outer diameter of 210mm to 240 mm.