CN217935255U

CN217935255U - Armature winding structure and motor

Info

Publication number: CN217935255U
Application number: CN202222236518.8U
Authority: CN
Inventors: 方成; 张帮成; 宋昕; 魏希盟
Original assignee: Hangzhou Beifeng Electromechanical Co ltd; Hangzhou Beifeng Technology Co ltd
Current assignee: Hangzhou Beifeng Electromechanical Co ltd; Hangzhou Beifeng Technology Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-11-29
Anticipated expiration: 2032-08-25

Abstract

The utility model discloses an armature winding structure belongs to the motor field. Comprises an armature core and a three-phase winding. Wherein, the armature core is in a circular ring structure; the three-phase winding comprises three coil groups which are tightly attached along the circumferential direction of the inner wall of the armature core to form a cylindrical winding, and the cylindrical winding enables the three-phase winding to be tightly attached to the inner wall of the armature core through a shaping process; the coil group consists of two single coils which are distributed in a mirror image mode about a symmetric axis of the armature core; and the two single coils are connected in series, and the winding span of the single coils at the two ends of the armature core is less than 180 degrees. The utility model discloses a design the winding mode of three-phase coil group, not only can obtain the back electromotive force the same with 180 degrees overlines like this to end winding length reduces, and the whole length of motor shortens, and the internal resistance that reduces simultaneously promotes the energy conversion efficiency of armature.

Description

Armature winding structure and motor

Technical Field

The utility model belongs to the motor field, especially, armature winding structure and motor.

Background

The hollow cup motor has the outstanding advantages of no tooth groove effect, high power density, low loss and the like. The winding of the coreless motor can be divided into an inclined winding, a straight winding, a diamond winding and the like according to the winding form, and the energy conversion rate of the armature of the straight winding is higher under the same parameters.

The production of the conventional coreless motor direct winding is generally that a self-adhesive enameled wire is wound and rolled into a cylindrical form, the upper end and the lower end are winding end parts, the middle section is an effective winding part, and the coreless motor direct winding is characterized in that the two end parts are thicker, and the middle part is thinner. And then, group shaping is carried out on the cylindrical windings through a tool, for example, one end winding is shaped towards the inside of the circle center, the other end winding is shaped towards the outside of the circle center, and the height of the end winding shaped towards the inside of the circle center is higher than that of the end winding shaped towards the outside of the circle center. Meanwhile, a straight winding armature coil of the traditional coreless armature is generally wound in a 180-degree overline mode, and an end winding is long, so that the overall length of the motor is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical defect, the utility model provides an armature winding structure to solve the problem that the background art relates.

The utility model provides an armature winding structure, include:

the armature iron core is of a circular ring structure;

the three-phase winding comprises three coil groups which are tightly attached along the circumferential direction of the inner wall of the armature core to form a cylindrical winding, and the cylindrical winding enables the three-phase winding to be tightly attached to the inner wall of the armature core through a shaping process; the coil group consists of two single coils which are distributed in a mirror image mode about a symmetric axis of the armature core; and the two single coils are connected in series, and the winding span of the single coils at the two ends of the armature core is less than 180 degrees.

Preferably or optionally, the armature core is an aggregate of silicon steel sheets with uniform magnetic resistance in each radial direction.

Preferably or optionally, the inner diameter and the end face of the armature core are coated with an insulating material.

Preferably or optionally, the winding ring area of the coil group inside the armature core occupies 120 degrees of a circular arc;

one side of the coil group is uniformly distributed around the circumference of the armature core with 60 degrees.

Preferably or optionally, the straight winding in the middle of the single coil corresponding to the armature core is an effective winding, and the bent part of the cross-line connection of the upper end part and the lower end part is an end winding.

Preferably or optionally, the end winding of the monocoil has a winding span of 150 degrees.

Preferably or optionally, the upper end winding and the lower end winding of the three-phase coil assembly are shaped towards the outer direction of the center of the armature circle to form an oblate cylinder.

Preferably or optionally, the single coils are each wound from a number of self-adhesive enamelled wires.

The utility model also provides an include the coreless motor of armature winding structure.

The utility model relates to an armature winding structure compares in prior art, has following beneficial effect: the utility model discloses a design the winding mode of three-phase coil assembly, each single coil wire winding span is 150 degrees, and the coil assembly respectively accounts for 120 degrees circular arc angles in the winding ring region, centers on armature centre of a circle 60 degrees circumference evenly distributed. Therefore, the back electromotive force which is the same as that of a 180-degree overline can be obtained, the length of the end winding is reduced, the overall length of the motor is shortened, the internal resistance is reduced, and the energy conversion efficiency of the armature is improved.

Drawings

Fig. 1 is a schematic structural diagram of a complete armature in the present invention.

Fig. 2 is a schematic structural diagram of a three-phase winding according to the present invention.

Fig. 3 is a schematic structural diagram of the coil assembly of the present invention.

Fig. 4 is a schematic structural diagram of a single coil in the present invention.

Fig. 5 is a schematic diagram of the over-line of the three-phase coil assembly of the present invention.

The reference signs are: armature core 100, three-phase winding 200, coil group 210, single coil 211, active winding 211a, end winding 211b, flat cylinder 220, coil group outlet 230.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

Referring to fig. 1 to 5, an armature winding structure includes: an armature core 100 and a three-phase winding 200. The armature core 100 is of a circular ring structure; the armature core 100 is an assembly of silicon steel sheets having uniform magnetic resistance in each radial direction, and an insulating material is coated on the inner diameter and end surfaces of the armature core 100. In order to fix the three-phase winding 200, a plurality of mounting grooves are provided inside the armature core 100. The three-phase winding 200 comprises three coil groups 210 tightly attached along the circumferential direction of the inner wall of the armature core 100 to form a cylindrical winding, and the cylindrical winding enables the three-phase winding 200 to be tightly attached to the inner wall of the armature core 100 through a shaping process; the coil group 210 is composed of two single coils 211 which are mirror-distributed about the axis of symmetry of the armature core 100; and the two single coils 211 are connected in series, the winding span of the single coil 211 at both ends of the armature core 100 is less than 180 degrees. The two single coils 211 are wound independently, so that winding overline is avoided, and mutual interference in space is avoided.

Specifically, a straight winding at a position corresponding to the armature core 100 in the middle of the single coil 211 is an effective winding 211a, and a bent portion where the upper and lower end portions of the single coil 211 are connected across the wire is an end winding 211b; the winding ring area of the coil group 210 inside the armature core 100 occupies a 120-degree arc; one side of the coil assembly 210 is uniformly distributed around the circumference of the armature core 100 with 60 degrees around the center of the circle, and the winding span of the end winding 211b of the single coil 211 is 150 degrees.

By designing the winding mode of the three-phase coil group 210, the winding span of each single coil 211 is 150 degrees, and the coil groups 210 respectively occupy 120-degree arc angles in the winding ring area and are uniformly distributed around the circumference of the armature circle center of 60 degrees. Therefore, the back electromotive force which is the same as that of a 180-degree overline can be obtained, the length of the end winding 211b is reduced, the overall length of the motor is shortened, the internal resistance is reduced, and the energy conversion efficiency of the armature is improved.

In a further embodiment, the upper and lower end windings 211b of the three-phase coil assembly 210 are shaped toward the outside of the center of the armature, forming a flat cylinder 220, and a coil assembly outlet 230 is disposed on one side of the flat cylinder 220. Because the two end parts of the armature winding are shaped towards the outside of the circle center, the through holes at the two ends are consistent, the rotor is convenient to install, and the motor assembling process is simple.

In a further embodiment, the single coil 211 is formed by winding a plurality of turns of self-adhesive enameled wire. And two single coils 211 in the same coil group 210 are connected in series, in the winding process, a single self-adhesive enameled wire is adopted to wind for a certain number of turns, namely, a single coil 211 is formed, and then one end of the single coil 211 is connected with the other single coil 211 to form a complete coil group 210. Therefore, a single flat or round self-adhesive enameled wire can be used for winding, specifically, a single coil 211 is formed by winding the single self-adhesive enameled wire for a certain number of turns, and then a new single coil 211 is wound on one end of the single coil 211 again, i.e. a complete coil group 210 is formed. The winding method is simple and reliable, the wire arrangement mode is unique, the span length is shortened, the space is utilized to the maximum extent, the internal resistance of the motor is reduced, the heat conduction performance of the motor winding is improved, and further the power density and the overall performance of the motor are greatly improved.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

Claims

1. An armature winding structure, comprising:

the armature iron core is of a circular ring structure;

2. The armature winding structure according to claim 1, wherein the armature core is an aggregate of silicon steel sheets having uniform magnetic resistance in each radial direction.

3. The armature winding structure according to claim 2, wherein the armature core has an inner diameter and end faces coated with an insulating material.

4. The armature winding structure according to claim 1, wherein a winding annular region of the coil group inside the armature core occupies an arc of 120 degrees;

5. The armature winding structure according to claim 1, wherein the straight winding in the middle of the single coil at a position corresponding to the armature core is an active winding, and the bent portion where the upper and lower end portions of the single coil are connected across the wires is an end winding.

6. The armature winding structure according to claim 5, wherein a winding span of the end winding of the single coil is 150 degrees.

7. The armature winding structure according to claim 1, wherein the upper and lower end windings of the three-phase coil assembly are shaped outward of the center of the armature to form an oblate cylinder.

8. The armature winding structure according to claim 1, wherein the single coils are formed by winding a plurality of turns of self-adhesive enameled wire.

9. A coreless motor comprising an armature winding structure as claimed in any one of claims 1 to 8.