Permanent magnet synchronous motor with high permanent magnet utilization rate

Abstract

The utility model discloses a permanent magnet synchronous motor with high permanent magnet utilization rate, which comprises a base main body, a rotor and a stator, and is characterized in that an end cover and a rear cover are fixedly arranged at the front end and the rear end of the base main body respectively; a transmission shaft is fixedly installed in the middle of the rotor, a penetrating groove is formed in the outer end of the rotor, a permanent magnet is fixedly installed on the inner wall of the penetrating groove, a magnetic conduction groove is formed in the inner wall of the stator, a magnetic conduction material is fixedly installed on the inner wall of the magnetic conduction groove, and a magnetic conduction pole plate is fixedly installed at the upper end of the magnetic conduction material. A first gap is reserved between the magnetic conductive pole plates, the magnetic conductive pole plates are of a fan-shaped structure, the magnetic conductive pole plates are made of electrical pure iron or silicon steel components made of high magnetic conductive materials, mounting grooves are formed in the outer ends of the end cover and the rear cover respectively, and heat dissipation filter screens are fixedly mounted on the inner walls of the mounting grooves. The magnetic field is generated by the permanent magnets and is enhanced by the magnetic conductive pole plates, so that the magnetic field distribution is more uniform and reasonable.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor with high permanent magnet utilization rate. Background Art

[0002] A permanent magnet synchronous motor is a motor that works on the principle of electromagnetic induction. The permanent magnet synchronous motor consists of a stator, a rotor, and an end cap. It uses permanent magnets to provide excitation, making the motor structure simpler, eliminating the collector rings and brushes that are prone to problems, and improving the reliability of the motor's operation. Because there is no need for excitation current and no excitation loss, the efficiency and power density of the motor are improved. It has the advantages of small size, simple structure, and high power density, and is widely used in position tracking control systems.

[0003] However, in actual use of the existing technology, with the advancement of science and technology and the enhancement of environmental awareness, permanent magnet synchronous motors are increasingly widely used in various fields. However, the utilization rate of permanent magnets in existing permanent magnet synchronous motors still needs to be improved, which not only affects the performance of the motor, but also increases the production cost. Therefore, how to improve the utilization rate of permanent magnets has become a problem that needs to be solved urgently. Utility Model Content

[0004] The purpose of the utility model is to provide a permanent magnet synchronous motor with high permanent magnet utilization rate, so as to solve the problem that the utilization rate of permanent magnets in the existing permanent magnet synchronous motors mentioned in the above background technology still needs to be improved, which not only affects the performance of the motor but also increases the production cost.

[0005] To achieve the above purpose, the utility model provides the following technical solution: comprising a machine base body, a rotor and a stator, wherein the front and rear ends of the machine base body are respectively fixedly installed with end covers and rear covers;

[0006] A transmission shaft is fixedly installed in the middle of the rotor, a through groove is opened at the outer end of the rotor, a permanent magnet is fixedly installed on the inner wall of the through groove, a magnetic conductive groove is opened on the inner wall of the stator, a magnetic conductive material is fixedly installed on the inner wall of the magnetic conductive groove, a magnetic conductive pole plate is fixedly installed on the upper end of the magnetic conductive material, a first gap is left between the magnetic conductive pole plates, the magnetic conductive pole plates are fan-shaped structures, and the magnetic conductive pole plates are made of electrical pure iron or silicon steel components with high magnetic conductivity.

[0007] Preferably, the outer ends of the end cover and the rear cover are respectively provided with mounting grooves, and the inner walls of the mounting grooves are fixedly installed with heat dissipation filters, so that the end cover and the rear cover cooperate with the heat dissipation filters to protect the front and rear ends of the base body while dissipating heat.

[0008] Preferably, the front and rear ends of the transmission shaft are rotatably connected to the end cover and the middle part of the rear cover via a rotating shaft respectively.

[0009] Preferably, there are several through slots, which are distributed rotationally symmetrically about the outer end of the rotor.

[0010] Preferably, the stator is fixedly mounted on the inner wall of the base body, and there are a plurality of magnetic conductive grooves which are rotationally symmetrically distributed on the inner wall of the stator.

[0011] Preferably, there are several magnetic conductive pole plates, which are symmetrically distributed in sequence around the upper ends of the magnetic conductive materials.

[0012] Preferably, a second gap is left between the edge of the magnetic conductive pole plate and the inner wall of the magnetic conductive groove, so that the second gap prevents friction or collision between the edge of the magnetic conductive pole plate and the inner wall of the magnetic conductive groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model realizes effective utilization of permanent magnets by means of magnetic conductive materials and magnetic conductive pole plates fixedly installed in magnetic conductive grooves. Specifically, when the permanent magnet synchronous motor is running, the magnetic field is generated by the permanent magnets, and the magnetic field is enhanced by the effect of the magnetic conductive pole plates, so that the magnetic field distribution is more uniform and reasonable;

[0015] 2. The utility model also makes the distribution of the magnetic field in the internal space of the base body more reasonable due to the fan-shaped structure of the magnetic conductive pole plate, thereby improving the efficiency of the permanent magnet synchronous motor. In addition, due to the first gap design left between the magnetic conductive pole plates, the heat generated by the motor during operation can be effectively dissipated, thereby improving the stability and life of the motor. At the same time, the existence of the first gap and the second gap also reduces the manufacturing cost of the motor, which is conducive to large-scale production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structure of a permanent magnet synchronous motor with high permanent magnet utilization rate is shown in the following figure. Figure 1 ;

[0017] Figure 2 The overall structure of a permanent magnet synchronous motor with high permanent magnet utilization rate is shown in the following figure. Figure 2 ;

[0018] Figure 3 The overall structure of a permanent magnet synchronous motor with high permanent magnet utilization rate is shown in the following figure. Figure 3 ;

[0019] Figure 4 The utility model is a schematic cross-sectional view of the overall structure of a permanent magnet synchronous motor with high permanent magnet utilization rate.

[0020] In the figure: 1. base body; 2. end cover; 3. rear cover; 4. mounting slot; 5. rotor; 6. stator; 7. through slot; 8. permanent magnet; 9. magnetic conductive slot; 10. magnetic conductive material; 11. magnetic conductive pole plate; 12. first gap; 13. second gap; 14. transmission shaft. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides a technical solution: including a base body 1, a rotor 5 and a stator 6, the front and rear ends of the base body 1 are respectively fixedly installed with an end cover 2 and a rear cover 3, the outer ends of the end cover 2 and the rear cover 3 are respectively provided with a mounting groove 4, and the inner wall of the mounting groove 4 is fixedly installed with a heat dissipation filter, so that the front and rear ends of the base body 1 are protected by the end cover 2 and the rear cover 3 in cooperation with the heat dissipation filter while dissipating heat;

[0023] A transmission shaft 14 is fixedly installed in the middle of the rotor 5, and the front and rear ends of the transmission shaft 14 are rotatably connected to the end cover 2 and the middle of the rear cover 3 through a rotating shaft. A through slot 7 is opened at the outer end of the rotor 5, and the number of through slots 7 is several, which are respectively distributed rotationally symmetrically with the outer end of the rotor 5. A permanent magnet 8 is fixedly installed on the inner wall of the through slot 7. The stator 6 is fixedly installed on the inner wall of the base body 1. A magnetic guide slot 9 is opened on the inner wall of the stator 6, and the number of magnetic guide slots 9 is several, which are respectively distributed rotationally symmetrically with the inner wall of the stator 6. A magnetic guide material 10 is fixedly installed on the inner wall of the magnetic guide slot 9. The magnetic guide material A magnetic conductive plate 11 is fixedly installed on the upper end of the material 10, and there are several magnetic conductive plates 11, which are symmetrically distributed in sequence on the upper end of the magnetic conductive material 10. The magnetic conductive plates 11 are fan-shaped structures, and a first gap 12 is left between the magnetic conductive plates 11. The size of the first gap 12 can be adjusted according to actual needs. The magnetic conductive plates 11 are made of electrical pure iron or silicon steel components with high magnetic conductivity. A second gap 13 is left between the edge of the magnetic conductive plate 11 and the inner wall of the magnetic conductive groove 9, so that the second gap 13 prevents friction or collision between the edge of the magnetic conductive plate 11 and the inner wall of the magnetic conductive groove 9;

[0024] When in use, the permanent magnet synchronous motor of the present invention realizes effective utilization of the permanent magnet 8 through the magnetic conductive material 10 and the magnetic conductive pole plate 11 fixedly installed in the magnetic conductive groove 9. Specifically, when the permanent magnet synchronous motor is running, the magnetic field is generated by the permanent magnet 8, and the magnetic field is enhanced by the action of the magnetic conductive pole plate 11, so that the magnetic field distribution is more uniform and reasonable.

[0025] At the same time, due to the fan-shaped structure of the magnetic conductive pole plate 11, the distribution of the magnetic field in the internal space of the base body 1 is more reasonable, which improves the efficiency of the permanent magnet synchronous motor. In addition, due to the design of the first gap 12 left between the magnetic conductive pole plates 11, the heat generated by the motor during operation can be effectively dissipated, which improves the stability and life of the motor. At the same time, the existence of the first gap 12 and the second gap 13 also reduces the manufacturing cost of the motor, which is conducive to large-scale production.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet synchronous motor with high permanent magnet utilization rate, comprising a base body (1), characterized in that: It comprises a rotor (5) and a stator (6), and the front and rear ends of the base body (1) are respectively fixedly mounted with an end cover (2) and a rear cover (3); A transmission shaft (14) is fixedly installed in the middle of the rotor (5), a through slot (7) is provided at the outer end of the rotor (5), a permanent magnet (8) is fixedly installed on the inner wall of the through slot (7), a magnetic conductive slot (9) is provided at the inner wall of the stator (6), a magnetic conductive material (10) is fixedly installed on the inner wall of the magnetic conductive slot (9), a magnetic conductive pole plate (11) is fixedly installed at the upper end of the magnetic conductive material (10), a first gap (12) is left between the magnetic conductive pole plates (11), the magnetic conductive pole plates (11) are in a fan-shaped structure, and the magnetic conductive pole plates (11) are made of electrical pure iron or silicon steel components with high magnetic conductivity.

2. A permanent magnet synchronous motor with high permanent magnet utilization rate according to claim 1, characterized in that: The outer ends of the end cover (2) and the rear cover (3) are respectively provided with mounting grooves (4), and the inner walls of the mounting grooves (4) are fixedly provided with heat dissipation filters, so that the end cover (2) and the rear cover (3) cooperate with the heat dissipation filters to protect the front and rear ends of the base body (1) while dissipating heat.

3. A permanent magnet synchronous motor with high permanent magnet utilization rate according to claim 2, characterized in that: The front and rear ends of the transmission shaft (14) are rotatably connected to the end cover (2) and the middle part of the rear cover (3) via a rotating shaft.

4. A permanent magnet synchronous motor with high permanent magnet utilization rate according to claim 3, characterized in that: There are a plurality of through slots (7), which are respectively distributed in a rotationally symmetrical manner around the outer end of the rotor (5).

5. A permanent magnet synchronous motor with high permanent magnet utilization rate according to claim 4, characterized in that: The stator (6) is fixedly mounted on the inner wall of the base body (1), and the magnetic conductive grooves (9) are in a plurality and are respectively distributed in a rotationally symmetrical manner on the inner wall of the stator (6).

6. A permanent magnet synchronous motor with high permanent magnet utilization rate according to claim 5, characterized in that: There are a plurality of magnetic conductive pole plates (11), which are symmetrically distributed in sequence on the upper ends of the magnetic conductive material (10).

7. A permanent magnet synchronous motor with high permanent magnet utilization rate according to claim 6, characterized in that: A second gap (13) is left between the edge of the magnetic conductive pole plate (11) and the inner wall of the magnetic conductive groove (9), so that the second gap (13) prevents friction or collision between the edge of the magnetic conductive pole plate (11) and the inner wall of the magnetic conductive groove (9).

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