Integrated stator core structure and motor

Abstract

The utility model discloses an integrated stator core structure which comprises an annular magnet yoke, a plurality of stator teeth are arranged on the circumferential surface of the annular magnet yoke, tooth crowns are arranged at the outer ends of the stator teeth, winding grooves are formed between every two adjacent stator teeth, and the annular magnet yoke, the stator teeth and the tooth crowns are of an integrated structure made of soft magnetic materials. And the winding is directly wound on the stator teeth. The stator core is integrally formed by the soft magnetic material, the iron loss of the soft magnetic material is small, large eddy current loss cannot be generated, the temperature rise of the motor is superior to that of a stator winding of a traditional metal punching sheet, and the reliability of the motor can be effectively improved; in addition, by adopting the soft magnetic material integrally-formed structure, an insulator does not need to be arranged in the winding groove, so that the space occupied by the insulator can be saved, the winding space of the winding is larger under the condition of the same specification, the winding can be completely wrapped by the magnetizer, the magnetic field utilization rate of the winding can be increased, and the efficiency of the motor can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technology field especially relates to a kind of stator core for 0-24V low-voltage motor and the motor of using this stator core. BACKGROUND

[0002] Stator core is the important component of motor magnetic circuit, it and rotor core, stator and rotor air gap together form the complete magnetic circuit of motor. Figure 1 As shown in the figure, the existing stator core mainly includes annular magnetic yoke 1, a plurality of stator teeth 2 distributed radially along the magnetic yoke, tooth crown 3 is provided at the end of the tooth part, winding slot is formed between adjacent two tooth parts, winding slot is used to set winding 5, winding 5 is set between tooth crown 3 and annular magnetic yoke 1, winding 5 is wound on stator tooth 2.

[0003] As shown in the figure, Figure 1 , 2 In order to play the role of insulation, insulation body 4 is provided between winding 5 and annular magnetic yoke 1, stator tooth 2 and tooth crown 3, winding 5 needs to be wound on insulation body 4, so that the height of winding 5 is often higher than the height of tooth top 2, so that the magnetic field loss of winding end face is increased, and the motor efficiency is affected. In addition, the existing stator core is usually composed of multiple layers of silicon steel sheets, and the silicon steel sheets will be damaged in alternating magnetic field environment, which will cause the problems of large motor heat generation and low motor efficiency, especially for low-voltage motor, the phenomenon is particularly significant. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem to provide a kind of integrated stator core structure with small magnetic field loss, which can effectively improve motor efficiency.

[0005] An integrated stator core structure includes an annular magnetic yoke, the circumferential surface of the annular magnetic yoke is provided with a plurality of stator teeth, the plurality of stator teeth is uniformly distributed along the circumferential surface of the annular magnetic yoke, the stator teeth extend along the radial direction of the annular magnetic yoke, the outer end of the stator teeth is provided with a tooth crown, and a winding slot is formed between adjacent two stator teeth, characterized in that the annular magnetic yoke, the stator teeth and the tooth crown are integrally formed of soft magnetic material, and the winding is directly wound on the stator teeth.

[0006] Preferably, the winding is enveloped between the annular magnetic yoke and the tooth crown.

[0007] Preferably, the height of the tooth crown is higher than the height of the winding.

[0008] Preferably, the soft magnetic material is ferrimagnetic oxide.

[0009] Preferably, the winding is made of enameled wire with insulation.​

[0010] The utility model discloses still disclose a kind of motor using the integrated stator core structure of above.

[0011] The above technical solution has the following beneficial effects: the stator core is integrally formed using soft magnetic material, the iron loss of the soft magnetic material itself is small, and large eddy current loss is not generated, the temperature rise of the motor is better than the stator winding of traditional metal punching sheet, and the reliability of the motor can be effectively improved; moreover, using this integrally formed structure of soft magnetic material, it is not necessary to set an insulator in the winding slot, so that the space occupied by the insulator can be saved, so that the winding space is larger under the condition of the same specification, and the winding can be completely covered by the magnetic conductor, the magnetic field utilization rate of the winding can be increased, and the efficiency of the motor can be effectively improved.

[0012] To further understand the features and technical contents of the utility model, please refer to the following detailed description and drawings of the utility model, however, the provided drawings are only used for reference and illustration, and not used to limit the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a perspective view of the existing stator core.

[0014] Figure 2 It is a sectional view of the existing stator core.

[0015] Figure 3 It is a perspective view of the embodiment of the utility model.

[0016] Figure 4 It is a sectional view of the embodiment of the utility model.

[0017] Figure 5 It is a perspective view of the embodiment of the utility model (without winding)

[0018] Explanation of original element label: 1, annular magnetic yoke; 2, stator tooth; 3, tooth crown; 4, insulator; 5, winding. DETAILED DESCRIPTION

[0019] The following is to illustrate the disclosed embodiment of the utility model through specific specific embodiment, and the person skilled in the art can understand the advantages and effects of the utility model from the disclosed content of the specification. The utility model can be implemented or applied through other different specific embodiments, and each detail in the specification can be modified and changed based on different viewpoints and applications without departing from the concept of the utility model. In addition, the drawings of the utility model are only simple schematic illustrations, not the depiction of actual size, and prior declaration. The following embodiment will further illustrate the related technical content of the utility model, but the disclosed content is not used to limit the protection scope of the utility model.

[0020] As Figure 3 , 4 , 5, the utility model discloses a kind of integrated stator core structures, it includes annular magnetic yoke 1, stator tooth 2 and the tooth crown 3 being arranged at stator tooth end portion. Annular magnetic yoke 1 is provided with multiple stator teeth 2 on the circumference, the circumference of annular magnetic yoke 1 can be outer circumference or inner circumference. The outer circumference of annular magnetic yoke 1 is provided with multiple stator teeth 2 in the embodiment, multiple stator teeth 2 are evenly distributed along the circumference of annular magnetic yoke, stator tooth 2 extends along the radial direction of annular magnetic yoke, tooth crown 3 is arranged at the outer end of stator tooth 2, and winding slot is formed between adjacent two stator teeth 2.

[0021] Annular magnetic yoke 1, stator tooth 2 and tooth crown 3 are integrally formed structure using soft magnetic material, winding 5 is directly wound on stator tooth, and no insulation part is arranged between winding 5 and stator tooth.As a preferred embodiment, winding 5 is enveloped between annular magnetic yoke 1 and tooth crown 3, and the height of tooth crown 3 is higher than the height of winding 5, so that the magnetic field utilization rate of winding coil can be effectively improved, and the efficiency of motor can be effectively improved.

[0022] As another embodiment of the utility model, soft magnetic material in the utility model is ferrimagnetic oxide, preferably Mn-Zn ferrite. Soft magnetic material is made of ferrimagnetic oxide by powder metallurgy process, material iron loss is small, and the efficiency of motor can be improved after reducing iron loss, so that the temperature rise of motor is better than that of traditional metal punched stator winding, and the reliability of motor can also be improved after reducing winding temperature rise. Ferrimagnetic oxide can be purchased or self-made, and the manufacturers include Tiantong TDG Company, Japan TDK and Jiangsu Eagle Group Co. Ltd. The initial permeability of YMH12 type ferrimagnetic oxide of Jiangsu Eagle Group Co. Ltd. is 12000+25%, the relative loss factor is less than or equal to 8 (10 kHz), and the resistivity is 0.15 Ω·m. The utilization rate of the soft magnetic material of the integrated structure is higher than 80%, and the utilization rate of the material of the traditional magnetic conductor is less than 50% made of silicon steel plate. Therefore, the integrated stator core structure can also save raw materials.

[0023] As another embodiment of the utility model, winding is wound by enameled wire with insulation skin. Because the resistivity of ferrite of stator core itself is large, enameled wire with insulation skin can play a better insulation effect, so that the insulation rate of low-voltage motor with voltage range of 0v-24V completely meets the product design requirement. The structure does not need to set insulation body in winding slot, can save the space occupied by insulation body, the space of winding is larger under the same specification condition, winding can be completely covered by magnetic conductor, the magnetic field utilization rate of winding can be increased, and the efficiency of motor can be improved.

[0024] The utility model discloses still disclose a kind of motor using the iron core structure above, this kind of motor is mainly 0-24V low-voltage motor.The stator core of this motor is integrally formed using soft magnetic material, the iron loss of soft magnetic material itself is smaller, will not produce big eddy current loss, the temperature rise of motor will be superior to the stator winding of traditional metal punching piece, can effectively improve the reliability of motor;In addition this stator core structure does not need to set up insulator in winding slot, can save the space occupied by insulator, the winding space is larger under the same specification condition, winding can be completely covered by magnetic conductor, can increase the magnetic field utilization rate of winding, can effectively improve the efficiency of motor.

[0025] The above disclosed content is only the preferred feasible embodiment of the utility model, and does not limit the patent application range of the utility model, so equivalent technical changes using the utility model specification and drawing content are included in the patent application range of the utility model.

Claims

1. An integrated stator core structure comprising a ring-shaped magnetic yoke, a circumferential surface of the ring-shaped magnetic yoke being provided with a plurality of stator teeth, the plurality of stator teeth being uniformly distributed along the circumferential surface of the ring-shaped magnetic yoke, the stator teeth extending in a radial direction of the ring-shaped magnetic yoke, an outer end of the stator teeth being provided with a tooth crown, a winding slot being formed between two adjacent stator teeth, characterized in that, The annular magnetic yoke, the stator teeth and the tooth crown are integrally formed structures using soft magnetic material, and the winding is directly wound on the stator teeth.

2. The integrated stator core structure of claim 1, wherein The winding is enveloped between the annular magnetic yoke and the tooth crown.

3. The integrated stator core structure of claim 2, wherein The height of the tooth crown is higher than the height of the winding.

4. The integrated stator core structure of claim 1, wherein The soft magnetic material uses ferrimagnetic oxide.

5. The integrated stator core structure of claim 1, wherein The winding is wound by enameled wire with insulation skin.

6. An electric machine characterized by It comprises the integrated stator core structure as claimed in any one of claims 1 to 5.

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