Multi-section permanent magnet synchronous motor

Abstract

The utility model relates to a multi-section permanent magnet synchronous motor, which relates to the technical field of permanent magnet motors, and comprises a shell, a rotor and a stator, the stator is fixed in the shell, bearings are arranged at two ends of the shell, the rotor is mounted on the shell through the bearings, a rotating shaft of the rotor extends out of one end of the shell, and the rotor axially comprises three sections of segmented rotors; every two adjacent segmented rotors are staggered by 3 degrees in the circumferential direction, and 3 degrees are mechanical angles. The segmented rotor adopts a permanent magnet segmented dislocation mode, is divided into three segments in the axial direction, is staggered by 3 degrees between every two adjacent segments in the circumferential direction, and is symmetrically mounted about a longitudinal coordinate line during mounting, so that the vibration stability can be improved.

Description

Technical Field

[0001] The present application relates to the field of permanent magnet motor technology, and in particular to a multi-stage permanent magnet synchronous motor. Background Art

[0002] Permanent magnet motors have stators with coils and rotors with permanent magnets. The rotor core is provided with magnet slots for inserting permanent magnets. Permanent magnet motors are used in more and more applications due to their high power density and high efficiency, which also puts higher requirements on permanent magnet motors. Existing permanent magnet motors often use multi-segment rotors, but multi-segment rotors often have the problem of unstable vibration, which affects the performance of the motor. Utility Model Content

[0003] In order to improve the problem of unstable vibration of a multi-section rotor during operation, the present application provides a multi-section permanent magnet synchronous motor.

[0004] The present application provides a multi-stage permanent magnet synchronous motor adopting the following technical solution:

[0005] A multi-section permanent magnet synchronous motor comprises a housing, a rotor and a stator, wherein the stator is fixed in the housing, bearings are provided at both ends of the housing, the rotor is mounted on the housing through the bearings, the rotating shaft of the rotor extends out of one end of the housing, the rotor axially comprises three segmented rotors, and two adjacent segmented rotors are circumferentially offset by 3 degrees, wherein the 3 degrees is a mechanical angle.

[0006] In one embodiment, the segmented rotor comprises a toothed ring, a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are spaced apart on a circumferential wall of the toothed ring, and the misalignment between two adjacent segmented rotors is achieved by misalignment of the toothed ring.

[0007] In one embodiment, a rotary transformer is provided at one end of the housing away from the rotating shaft, and the rotary transformer is provided at one end of the rotor away from the rotating shaft.

[0008] The multi-stage permanent magnet synchronous motor provided by the embodiments of the present disclosure can achieve the following technical effects:

[0009] The segmented rotor adopts the form of segmented staggered permanent magnets. It is divided into three sections in the axial direction, and each adjacent section is staggered by 3° in the circumferential direction. It is installed symmetrically along the longitudinal coordinate line during installation, which helps to improve the stability of vibration.

[0010] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of a multi-stage permanent magnet synchronous motor provided in an embodiment of the present application.

[0012] Figure 2 It is a schematic diagram of the structure of the segmented rotor provided in the embodiment of the present application.

[0013] Explanation of the accompanying drawings: 1. housing; 2. stator; 3. rotor; 4. bearing; 5. segmented rotor; 6. toothed ring; 7. first permanent magnet; 8. second permanent magnet; 9. rotary transformer; 10. rotating shaft. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0015] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0016] The following is combined with Figure 1-2 This application is described in further detail.

[0017] A multi-section permanent magnet synchronous motor comprises a housing 1, a rotor 3 and a stator 2. The stator 2 is fixed in the housing 1. Bearings 4 are provided at both ends of the housing 1. The rotor 3 is mounted on the housing 1 through the bearings 4. A rotating shaft 10 of the rotor 3 extends out of one end of the housing 1. The rotor 3 axially comprises three segmented rotors 5. Two adjacent segmented rotors 5 are circumferentially offset by 3 degrees, where 3 degrees is a mechanical angle.

[0018] In one embodiment, the segmented rotor 5 includes a toothed ring 6 , a first permanent magnet 7 and a second permanent magnet 8 . The first permanent magnet 7 and the second permanent magnet 8 are spaced apart on the peripheral wall of the toothed ring 6 . The misalignment between two adjacent segmented rotors 5 is achieved by misalignment of the toothed ring 6 .

[0019] In one embodiment, a rotary transformer 9 is disposed at one end of the housing 1 away from the rotating shaft 10 , and the rotary transformer 9 is disposed at one end of the rotor 3 away from the rotating shaft 10 .

[0020] The rotor 3 is fixed to the housing through the bearing 4 and the limiting collar. The stator 2 is installed on the housing through the interference limiting installation method. The rotary transformer 9 component is fixed to the rotor 3 through the embedding limiting method and fixed to the housing through the sleeve limiting method.

[0021] The segmented rotor 3 adopts a segmented staggered permanent magnet form, which is divided into three sections in the axial direction, and each adjacent two sections are staggered by 3° (mechanical angle) in the circumferential direction. The angular stagger is achieved through an intermediate toothed ring to improve the flexibility of motor manufacturing. In one embodiment, the three-section rotor 3 is marked as A, B, and C, and A, B, and C are connected in sequence. The actual three-section rotor 3 is divided into two types, A and C are the same, and they are installed symmetrically with the longitudinal coordinate line during installation, which helps to improve the stability of vibration.

[0022] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-stage permanent magnet synchronous motor, comprising a housing, a rotor and a stator, wherein the stator is fixed in the housing, bearings are provided at both ends of the housing, the rotor is mounted on the housing through the bearings, and the rotating shaft of the rotor extends out of one end of the housing, characterized in that: The rotor axially comprises three segmented rotors, and two adjacent segmented rotors are circumferentially offset by 3 degrees, where the 3 degrees is a mechanical angle.

2. The multi-stage permanent magnet synchronous motor according to claim 1, characterized in that: The segmented rotor comprises a toothed ring, a first permanent magnet and a second permanent magnet. The first permanent magnet and the second permanent magnet are arranged at intervals on the peripheral wall of the toothed ring. The misalignment between two adjacent segmented rotors is achieved by misalignment of the toothed ring.

3. The multi-stage permanent magnet synchronous motor according to claim 1, characterized in that: A rotary transformer is arranged at one end of the housing away from the rotating shaft, and the rotary transformer is arranged at one end of the rotor away from the rotating shaft.

Images