Magnetic steel installation structure in SPM rotor

Abstract

The utility model provides a magnetic steel installation structure in an SPM rotor. The magnetic steel installation structure is characterized in that an iron core groove is formed in the center of an iron core; the two ends of the pressing plate positioning structure cover the upper side and the lower side of the iron core respectively, and the pressing plate positioning structure is arranged around the iron core in the center. The iron core, the pressing plate positioning structure and the magnetic steel sheet groups are arranged in parallel, magnetic steel sheets in each magnetic steel sheet group are arranged on the periphery of the iron core at equal intervals in a surrounding mode, the iron core, the pressing plate positioning structure and the magnetic steel sheet groups are adopted, the iron core is designed to be a standard whole circle, positioning is provided for magnetic steel installation through the pressing plate positioning structure 2, and the magnetic steel sheet groups are arranged in parallel. Under the condition that the assembling difficulty of the SPM rotor is not increased, the magnetic leakage of the iron core 1 is reduced, the electric energy conversion efficiency of the SPM rotor is improved, and compared with the original design, the magnetic steel installation structure in the SPM rotor provided by the utility model saves more materials under the condition that the performance is the same.

Description

Technical Field

[0001] The utility model relates to the field of rotor design in motors, in particular to the field of improving the electric energy conversion efficiency of SPM rotors, and specifically to a magnetic steel installation structure in an SPM rotor. Background Art

[0002] To facilitate the assembly and positioning of the magnets, the existing SPM rotor structure has dovetail slots on the surface of the iron core for guidance. The magnets are stuck in the dovetail slots during installation. When the SPM rotor is running with this installation method, the magnetic field of the positioning protrusions formed between two adjacent dovetail slots around the iron core will leak, reducing the power conversion efficiency. Summary of the Invention

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a magnetic steel installation structure in an SPM rotor to solve the difficulties of the prior art.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a magnetic steel installation structure in an SPM rotor, comprising:

[0005] An iron core 1, wherein an iron core slot 11 is provided in the center of the iron core 1;

[0006] A pressure plate positioning structure 2, the two ends of which are respectively covered on the upper and lower sides of the iron core 1, and the center of the pressure plate positioning structure 2 is set around the iron core 1;

[0007] There are two magnetic steel sheet groups, which are arranged in parallel. The magnetic steel sheets 3 in each group are arranged around the iron core 1 at equal intervals.

[0008] According to a preferred embodiment, the iron core 1 is in a standard cylindrical shape.

[0009] According to the preferred embodiment, the pressure plate positioning structure 2 includes: a positioning pressure plate 21, a magnetic steel positioning plate 22 and a lower pressure plate 23. The positioning pressure plate 21 is pressed on the top of the iron core 1. Several magnetic steel positioning plates 22 are arranged at equal intervals around the positioning pressure plate 21. The lower pressure plate 23 is pressed on the bottom of the iron core 1. A mounting shaft hole 24 that is interference fit with the electronic shaft is opened in the middle of the positioning pressure plate 21 and the lower pressure plate 23.

[0010] According to a preferred embodiment, the positioning plate 21 , the magnetic steel positioning plate 22 and the lower pressing plate 23 are made of aluminum.

[0011] According to a preferred embodiment, the positioning pressure plate 21 and the magnetic steel positioning plate 22 are integrally provided.

[0012] According to a preferred embodiment, there is a gap of 0.2 mm between the magnetic steel positioning plate 22 and the iron core 1 .

[0013] According to a preferred embodiment, the bottom end of the magnetic steel positioning plate 22 contacts the top end of the lower pressing plate 23 .

[0014] According to the preferred embodiment, the magnetic steel sheet 3 is connected to the iron core 1 by glue, and the magnetic steel sheet 3 is arranged between adjacent magnetic steel positioning plates 22, and the left and right sides of the magnetic steel sheet 3 are in contact with the magnetic steel positioning plates 22.

[0015] The present invention adopts an iron core, a pressure plate positioning structure, and a magnetic steel sheet group. The iron core is designed to be a standard full circle. The pressure plate positioning structure 2 provides positioning for the magnetic steel installation. Without increasing the difficulty of SPM rotor assembly, the magnetic leakage of the iron core 1 is reduced and the power conversion efficiency of the SPM rotor is improved. Compared with the original design, the magnetic steel installation structure in the SPM rotor proposed by the present invention saves more materials under the condition of the same performance.

[0016] The following will describe in more detail the best embodiments of the present invention in conjunction with the accompanying drawings so that the features and advantages of the present invention can be easily understood. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 Shown is an enlarged schematic diagram of the three-dimensional structure of the pressure plate positioning structure in the present invention;

[0019] Figure 3 Shown is an enlarged schematic diagram of the three-dimensional structure of the magnetic steel sheet in the present invention;

[0020] Figure 4 Shown is an enlarged schematic diagram of the three-dimensional structure of the iron core in the present invention;

[0021] Figure 5 Shown is a schematic diagram of an SPM rotor design with poor power conversion efficiency in the prior art background;

[0022] Figure 6 Shown is a schematic diagram of an iron core design with poor power conversion efficiency in the prior art background;

[0023] Label Description

[0024] 1. Iron core; 11. Iron core slot;

[0025] 2. Press plate positioning structure; 21. Positioning press plate; 22. Magnetic steel positioning plate; 23. Lower press plate; 24. Mounting shaft hole;

[0026] 3. Magnetic steel sheet; DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Compared to the embodiments shown in the drawings, feasible embodiments within the scope of protection of the present invention may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the specification and claims of the present utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not necessarily indicate a quantity limitation. Words such as "include" or "comprising" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] The present invention proposes a magnetic steel installation structure in an SPM rotor, which is used in the rotor design process of an electric motor. The present invention does not limit the specific specifications and types of the SPM rotor, but the structure of the iron core 1, the pressure plate positioning structure 2, and the magnetic steel sheet group is particularly suitable for improving the power conversion efficiency of the SPM rotor.

[0031] In general, the magnetic steel installation structure in the SPM rotor proposed by the present invention mainly includes: iron core 1, pressure plate positioning structure 2, magnetic steel sheet group, among which, you can refer to Figure 1 , which shows the arrangement relationship of the iron core 1, the pressure plate positioning structure 2, and the magnetic steel sheet group.

[0032] The magnetic steel installation structure in the SPM rotor proposed by the present invention eliminates the design in the prior art in which the magnetic steel is positioned and assembled through the dovetail groove design opened on the surface of the iron core. The iron core 1 is designed to be a standard full circle, and the pressure plate positioning structure 2 is used to provide positioning for the magnetic steel installation. Without increasing the difficulty of SPM rotor assembly, the magnetic leakage of the iron core 1 is reduced, and the electric energy conversion efficiency of the SPM rotor is improved. Compared with the original design, the magnetic steel installation structure in the SPM rotor proposed by the present invention saves more materials under the condition of the same performance.

[0033] The core 1 is provided with a core slot 11 in the middle thereof, and the core 1 is in a standard cylindrical shape to reduce magnetic leakage. Figure 2 When the SPM rotor mentioned in the background art achieves the same output and performance, the core 1 has a smaller specification and the diameter of the laminated sheets constituting the core 1 is smaller, thereby reducing the use of silicon steel and copper in the core 1 .

[0034] The two ends of the above-mentioned pressure plate positioning structure 2 are respectively covered on the upper and lower sides of the iron core 1, and the pressure plate positioning structure 2 is arranged in the middle of the four sides of the iron core 1, wherein the pressure plate positioning structure 2 includes: a positioning pressure plate 21, a magnetic steel positioning plate 22 and a lower pressure plate 23. The positioning pressure plate 21 is pressed on the top of the iron core 1, and several magnetic steel positioning plates 22 are arranged at equal intervals around the positioning pressure plate 21. The magnetic steel positioning plates 22 are positioned when the magnetic steel is installed. The lower pressure plate 23 is pressed on the bottom end of the iron core 1. The positioning pressure plate 21 and the lower pressure plate 23 are provided with a mounting shaft hole 24 in the middle that is interference fit with the electronic shaft. It should also be noted that the positioning pressure plate 21, the magnetic steel positioning plate 22 and the lower pressure plate 23 are made of aluminum. The positioning pressure plate 21 and the magnetic steel positioning plate 22 are integrated into one piece with high overall strength. There is a gap of 0.2mm between the magnetic steel positioning plate 22 and the iron core 1, which reduces the difficulty of pressing the positioning pressure plate 21 on the iron core 1.

[0035] The above-mentioned magnetic steel sheet groups are provided in two groups, and the two groups of magnetic steel sheet groups are arranged in parallel. The magnetic steel sheets 3 in each group of magnetic steel sheet groups are arranged around the iron core 1 at equal intervals. The magnetic steel sheets 3 are connected to the iron core 1 by glue. The magnetic steel sheets 3 are arranged between adjacent magnetic steel positioning plates 22, and the left and right sides of the magnetic steel sheets 3 are in contact with the magnetic steel positioning plates 22.

[0036] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A magnetic steel installation structure in an SPM rotor, characterized in that: include: An iron core (1), wherein an iron core slot (11) is provided in the center of the iron core (1); A pressure plate positioning structure (2), wherein both ends of the pressure plate positioning structure (2) are respectively covered on the upper and lower sides of the iron core (1), and the center of the pressure plate positioning structure (2) is arranged around the iron core (1); Magnetic steel sheet groups, wherein two groups of magnetic steel sheet groups are provided, the two groups of magnetic steel sheet groups are arranged in parallel, and the magnetic steel sheets (3) in each group of magnetic steel sheet groups are arranged around the iron core (1) at equal intervals.

2. The magnetic steel installation structure in the SPM rotor according to claim 1, characterized in that: The iron core (1) is in a standard cylindrical shape.

3. The magnetic steel installation structure in the SPM rotor according to claim 2, characterized in that: The pressure plate positioning structure (2) comprises: a positioning pressure plate (21), a magnetic steel positioning plate (22) and a lower pressure plate (23); the positioning pressure plate (21) is pressed on the top of the iron core (1); a plurality of magnetic steel positioning plates (22) are arranged at equal intervals around the positioning pressure plate (21); the lower pressure plate (23) is pressed on the bottom of the iron core (1); and a mounting shaft hole (24) that is interference-fitted with the electronic shaft is opened in the middle of the positioning pressure plate (21) and the lower pressure plate (23).

4. The magnetic steel installation structure in the SPM rotor according to claim 3, characterized in that: The positioning pressure plate (21) and the magnetic steel positioning plate (22) are integrally arranged.

5. The magnetic steel installation structure in the SPM rotor according to claim 4, characterized in that: There is a gap of 0.2 mm between the magnetic steel positioning plate (22) and the iron core (1).

6. The magnetic steel installation structure in the SPM rotor according to claim 5, characterized in that: The bottom end of the magnetic steel positioning plate (22) contacts the top end of the lower pressing plate (23).

7. The magnetic steel installation structure in the SPM rotor according to claim 6, characterized in that: The magnetic steel sheet (3) is connected to the iron core (1) by glue, and the magnetic steel sheet (3) is arranged between adjacent magnetic steel positioning plates (22). The left and right sides of the magnetic steel sheet (3) are in contact with the magnetic steel positioning plates (22).

Images