CN218603338U

CN218603338U - Novel pseudo-permanent magnet motor that directly drives of vernier

Info

Publication number: CN218603338U
Application number: CN202222054595.1U
Authority: CN
Inventors: 印欣; 沈梦笑; 唐守杰; 林浩元
Original assignee: Jacobs Precision Electromechanical Nantong Co ltd
Current assignee: Jacobs Precision Electromechanical Nantong Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2023-03-10
Anticipated expiration: 2032-08-05

Abstract

The utility model discloses a novel vernier pseudo-direct-drive permanent magnet motor, which is characterized in that the whole motor structure consists of a stator, a high-speed rotor, a low-speed rotor, a bearing and position feedback; the stator is composed of an armature winding, a stator iron core and a machine shell, the stator iron core is assembled on the machine shell in a glue bonding or shrink fit mode, and the armature winding is wound on the stator iron core. The high-speed rotor is composed of a central shaft, a high-speed rotor permanent magnet and a rotor iron core, the high-speed rotor permanent magnet is bonded on the rotor iron core through glue, and the rotor iron core is fixed on the central shaft in a bonding or shrink fit mode. The low-speed rotor is composed of a low-speed rotor permanent magnet and a stainless steel sleeve, and the low-speed rotor permanent magnet is bonded on the stainless steel sleeve through glue. The stator, the high-speed rotor and the low-speed rotor are assembled through bearings, and relative motion exists. The structure combines the advantages of a vernier motor and a pseudo direct drive motor, thereby realizing the output of low speed and large torque.

Description

Novel pseudo-permanent magnet motor that directly drives of vernier

Technical Field

The utility model relates to a novel pseudo-permanent magnet machine that directly drives of vernier belongs to the motor and makes technical field.

Background

In a conventional motor system, a motor and a mechanical gear are usually matched to realize low-speed and high-torque output. However, since the mechanical gear is driven by the contact of the gears, there are inevitable problems such as friction, noise, and lubrication, and particularly, in the case of overload, the gears are easily damaged, so that the reliability of the system is lowered. At present, the direct-drive permanent magnet motor with wide practical application reduces the rotating speed and improves the output torque by increasing the motor stage number, the number of slots of the motor and the number of pole pairs of permanent magnets are increased by the design, the volume of the motor is increased, and the torque density is not high.

SUMMERY OF THE UTILITY MODEL

To the problem that above-mentioned prior art exists, the utility model provides a novel pseudo-permanent-magnet machine that directly drives of vernier to solve above-mentioned technical problem.

In order to realize the purpose, the utility model discloses a technical scheme is: a novel vernier pseudo-direct-drive permanent magnet motor comprises a stator, a high-speed rotor, a low-speed rotor and a position feedback assembly; the stator consists of an armature winding, a stator iron core and a shell; the stator core is assembled on the shell in a glue bonding or shrink fit mode, and the armature winding is wound on the stator core; the position feedback assembly comprises a grating ruler and an encoder; the grating ruler and the encoder are arranged in the shell;

the high-speed rotor consists of a central shaft, a high-speed rotor permanent magnet and a rotor iron core; the high-speed rotor permanent magnet is bonded on the rotor iron core through glue, and the rotor iron core is fixed on the central shaft in a bonding or shrink fit mode;

the low-speed rotor is composed of a low-speed rotor permanent magnet and a stainless steel sleeve, and the low-speed rotor permanent magnet is bonded to the stainless steel sleeve through glue;

one side of the central shaft is assembled and connected with the stainless steel sleeve through a bearing; the low-speed rotor is assembled and connected with the other side of the central shaft through a bearing;

the left side and the right side of the casing are respectively assembled and connected with the stainless steel sleeve and the low-speed rotor through bearings.

Furthermore, the high-speed rotor permanent magnet of the high-speed rotor adopts parallel magnetization, and the low-speed rotor permanent magnet of the low-speed rotor adopts a Halbach permanent magnet array.

Furthermore, the thickness of the part of the stainless steel sleeve stuck with the low-speed rotor permanent magnet is 2.5mm.

Furthermore, an annular groove is formed in the stainless steel sleeve and used for installing the low-speed rotor permanent magnet.

The utility model has the advantages that: the novel vernier pseudo-direct-drive permanent magnet motor is designed, the advantages of the vernier motor and the advantages of the pseudo-direct-drive motor are combined, the output of low-speed large torque is realized, and the theoretical torque density of the motor reaches 112Nm/L; the output torque of the motor is limited by the torque capacity of the magnetic gear part. The motor adopts the parallel magnetization of the high-speed rotor, and the low-speed rotor adopts the magnetization mode of halbach permanent magnet array, so that the air gap magnetic density is increased, the torque transmission capability of the magnetic gear is improved, and the torque output capability of the whole motor is improved. The permanent magnet of the low-speed rotor is fixed by the stainless steel sleeve, so that the structural strength is ensured, and meanwhile, the influence of the sleeve on the magnetic field of the motor is reduced to the maximum extent by adopting the stainless steel material without magnetic conductivity.

Drawings

Fig. 1 is a schematic cross-sectional view of the structure of the present invention.

In the figure: 1. the high-speed rotor comprises a high-speed rotor body, 2, a low-speed rotor body, 3, an armature winding body, 4, a stator core, 51, a high-speed rotor permanent magnet, 52, a low-speed rotor permanent magnet, 6, a stainless steel sleeve, 7, a rotor core, 8, a central shaft, 9, a bearing, 10, a casing, 11, a grating ruler, 12 and an encoder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.

As shown in fig. 1, the motor comprises a stator, a high-speed rotor 1, a low-speed rotor 2 and a position feedback assembly; the stator is composed of an armature winding 3, a stator iron core 4 and a casing 10; the stator core 4 is assembled on the shell 10 in a glue bonding or shrink fit mode, and the armature winding 3 is wound on the stator core 4; the position feedback assembly comprises a grating ruler 11 and an encoder 12; the grating ruler 11 and the encoder 12 are arranged in the casing 10;

the high-speed rotor 1 consists of a central shaft 8, a high-speed rotor permanent magnet 51 and a rotor iron core 7; the high-speed rotor permanent magnet 51 is bonded on the rotor core 7 through glue, and the rotor core 7 is fixed on the central shaft 8 through bonding or shrink fit;

the low-speed rotor 2 is composed of a low-speed rotor permanent magnet 52 and a stainless steel sleeve 6, and the low-speed rotor permanent magnet 52 is bonded on the stainless steel sleeve 6 through glue;

one side of the central shaft 8 is connected with the stainless steel sleeve 6 in an assembling way through a bearing 9; the low-speed rotor 2 is assembled and connected with the other side of the central shaft 8 through a bearing 9;

the left side and the right side of the casing 10 are respectively assembled and connected with the stainless steel sleeve 6 and the low-speed rotor 2 through bearings.

In the preferred embodiment, the high-speed rotor permanent magnet 51 of the high-speed rotor 1 is magnetized in parallel, and the low-speed rotor permanent magnet 52 of the low-speed rotor 2 is a Halbach permanent magnet array.

In the preferred embodiment, the thickness of the stainless steel sleeve 6 adhering to the low-speed rotor permanent magnet 52 is 2.5mm, so as to ensure the structural strength and reduce the influence on the torque density of the motor as much as possible.

In the preferred embodiment, the stainless steel sleeve 6 is provided with an annular groove for mounting the low speed rotor permanent magnet 52.

The vernier pseudo direct drive motor in the structure can be regarded as the coupling of a permanent magnet synchronous motor and a magnetic gear: the armature winding 3, the stator core 4 and the high-speed rotor 1 can be regarded as a permanent magnet synchronous motor, so that the high-speed rotor 1 rotates at a synchronous speed with the armature magnetic field.

The low-speed rotor 2, the high-speed rotor 1, and the stator core 4 can be regarded as coaxial magnetic gears, and therefore the low-speed rotor 2 rotates in reverse at the rotational speed of the high-speed rotors 11/14.

When the motor runs stably, the high-speed rotor 1 is simultaneously subjected to acting force from the armature winding 3 and the magnetic gear, and the acting force are mutually counteracted, so that torque is not output; the low-speed rotor 2 receives forces from the armature winding 3 and the magnetic gear at the same time, and the two are superposed with each other to output torque.

The novel vernier pseudo direct-drive permanent magnet motor is designed, the advantages of the vernier motor and the advantages of the pseudo direct-drive motor are combined, the output of low-speed large torque is realized, and the theoretical torque density of the motor reaches 112Nm/L; the output torque of the motor is limited by the torque capacity of the magnetic gear part. The motor adopts the parallel magnetization of high-speed rotor, and the low-speed rotor adopts the magnetization mode of halbach permanent magnet array, has increased the air gap flux density, has improved the ability of magnetic gear transmission torque to the ability of whole motor output torque has been improved. The permanent magnet of the low-speed rotor is fixed by the stainless steel sleeve, so that the structural strength is ensured, and meanwhile, the influence of the sleeve on the magnetic field of the motor is reduced to the maximum extent by adopting the stainless steel material without magnetic conductivity.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, which is intended to cover any modifications, equivalent substitutions or improvements made within the spirit and scope of the present invention.

Claims

1. A novel vernier pseudo-direct-drive permanent magnet motor is characterized by comprising a stator, a high-speed rotor (1), a low-speed rotor (2) and a position feedback assembly; the stator is composed of an armature winding (3), a stator iron core (4) and a shell (10); the stator core (4) is assembled on the shell (10) in a glue bonding or shrink fit mode, and the armature winding (3) is wound on the stator core (4); the position feedback assembly comprises a grating ruler (11) and an encoder (12); the grating ruler (11) and the encoder (12) are arranged in the shell (10);

the high-speed rotor (1) is composed of a central shaft (8), a high-speed rotor permanent magnet (51) and a rotor iron core (7); the high-speed rotor permanent magnet (51) is bonded on the rotor iron core (7) through glue, and the rotor iron core (7) is fixed on the central shaft (8) in a bonding or shrink fit mode;

the low-speed rotor (2) is composed of a low-speed rotor permanent magnet (52) and a stainless steel sleeve (6), and the low-speed rotor permanent magnet (52) is bonded on the stainless steel sleeve (6) through glue;

one side of the central shaft (8) is connected with the stainless steel sleeve (6) in an assembling way through a bearing (9); the low-speed rotor (2) is assembled and connected with the other side of the central shaft (8) through a bearing (9);

the left side and the right side of the casing (10) are respectively assembled and connected with the stainless steel sleeve (6) and the low-speed rotor (2) through bearings.

2. A novel vernier pseudo-direct-drive permanent magnet motor as claimed in claim 1, wherein the high speed rotor permanent magnet (51) of the high speed rotor (1) adopts parallel magnetization, and the low speed rotor permanent magnet (52) of the low speed rotor (2) adopts Halbach permanent magnet array.

3. A novel vernier pseudo-direct drive permanent magnet motor as claimed in claim 1, wherein the thickness of the part of the stainless steel sleeve (6) adhered with the low speed rotor permanent magnet (52) is 2.5mm.

4. A novel vernier pseudo direct-drive permanent magnet motor as claimed in claim 1, wherein an annular groove is provided on the stainless steel sleeve (6) for mounting the low speed rotor permanent magnet (52).