CN213305107U

CN213305107U - High-rotating-speed high-current-energy-density permanent magnet synchronous motor

Info

Publication number: CN213305107U
Application number: CN202022179332.4U
Authority: CN
Inventors: 陈丹妮; 孙立洋; 徐伟栋; 马钰; 章国松; 魏文栋
Original assignee: Zhejiang Youlishi Machinery & Electronic Technology Co ltd
Current assignee: Zhejiang Youlishi Electric Drive Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-05-28
Anticipated expiration: 2030-09-29

Abstract

The utility model discloses a high rotational speed high current energy density PMSM, including end cover, stator, rotor, the rotor includes the pivot, and the end cover is formed by interior end cover and outer end cover amalgamation, is equipped with the frame on the interior end cover, and the pivot is installed and is covered in the inner. The permanent magnet rotor is placed under each pole in a four-section Halbach array mode, and a copper ring is added on the upper part of each pole of the permanent magnet rotor; two sections at the edge of each pole are magnetized in a tangential direction, and two sections in the middle are magnetized in a diagonal direction, so that the air gap magnetic density of the motor is improved, and the torque density and the power density of the motor are increased. Further, this design designs into the mosaic structure with the end cover, and the frame covers in the inner, and so, the distance of frame and pivot is nearer, and inner end cover non-deformable, the pivot is more stable, does benefit to whole motor and stabilizes.

Description

High-rotating-speed high-current-energy-density permanent magnet synchronous motor

Technical Field

The utility model relates to a motor, concretely relates to structure of motor.

Background

Application No. 201110406934.1, application publication No. CN103166406A discloses a high power density and high efficiency permanent magnet synchronous motor for a vehicle, which includes a motor rotating shaft, a bearing, an end cap, a machine base, a rotary transformer, a stator winding, a stator core, a copper ring, a neodymium iron boron permanent magnet, a rotor core, and a flat key, wherein the rotor core is formed by laminating silicon steel sheets, the rotor core is fixed on the rotating shaft by the flat key, the rotary transformer is further installed at the non-output shaft extension end of the rotor, and each pole of the permanent magnet rotor of the motor is placed in a four-section type Halbach array form and each pole is added with the copper ring on the upper part of the permanent; two sections at the edge of each pole are magnetized in a tangential direction, and two sections in the middle are magnetized in a diagonal direction.

The motor has the advantages that the magnetic field connection between poles is facilitated, the magnetic density of the yoke part of the rotor is reduced, the magnetic concentration effect in the Halbach array form is achieved, the magnetic flux of the permanent magnet is fully concentrated to the side of the stator, the air gap magnetic density of the motor is improved, and therefore the torque density and the power density of the motor are increased; the Halbach array type permanent magnet has high magnetic resistance and strong capability of resisting stator harmonic current, and reduces the eddy current loss and torque ripple of the permanent magnet; the Halbach array permanent magnet has good working point stability and more stable rotor magnetic flux, effectively reduces the iron core loss of the rotor and improves the motor efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem that: the structural stability of the permanent magnet synchronous motor is improved.

In order to solve the technical problem, the utility model provides a following technical scheme: the high-speed high-current energy density permanent magnet synchronous motor comprises an end cover, a stator and a rotor, wherein the rotor comprises a rotating shaft, the end cover is formed by splicing an inner end cover and an outer end cover, a base is arranged on the inner end cover, and the rotating shaft is arranged on the inner end cover.

The base is used for fixing the whole motor, the base of the motor in the prior art is arranged on the periphery of the motor and is far away from the rotating shaft, the rotating shaft is supported by the end cover, and after long-term use, the deformation of the end cover causes the rotating shaft to shift, the rotor to shift, and even the rotor is in friction contact with the stator. The utility model discloses design into the mosaic structure with the end cover, and the frame design covers in the inner, so, the frame is nearer with the distance of pivot, interior end cover non-deformable, and the pivot is more stable, and correspondingly, the rotor is more stable with the location, and whole motor is stable. In addition, the connection part of the inner end cover and the outer end cover of the end cover with the split structure can absorb the deformation of the inner end cover or the outer end cover, so that the stability of the whole structure of the motor is kept.

Drawings

The invention will be further explained with reference to the drawings:

fig. 1 is a schematic diagram of a high-speed high-energy-density permanent magnet synchronous motor, in which a housing 60 and an outer end cover 50 are independent parts;

fig. 2 is a schematic diagram of a high-speed high-current energy density permanent magnet synchronous motor, in which a housing 60 is integrally formed with an outer end cap 50.

The symbols in the drawings illustrate that:

10. a rotating shaft;

20. a stator;

30. a rotor;

40. an inner end cap; 41. a machine base; 42. a first connecting edge;

50. an outer end cover; 51. a second connecting edge; 52. a threaded connection;

60. a housing;

70. a rotary transformer; 71. a bearing; 72. a seal ring; 73. and (6) connecting hole positions.

Detailed Description

Referring to fig. 1, the high-speed high-current energy density permanent magnet synchronous motor comprises an end cover, a stator 20 and a rotor 30, wherein the rotor comprises a rotating shaft 10, the end cover is formed by splicing an inner end cover 40 and an outer end cover 50, a base 41 is arranged on the inner end cover, and the rotating shaft is arranged on the inner end cover. The form of the motor stator is the same as that of the traditional permanent magnet synchronous motor, the permanent magnet rotor comprises a rotating shaft, a neodymium iron boron permanent magnet, a copper sheet and a rotor iron core, the specific reference is made to patent documents with application number 201110406934.1 and application publication number CN103166406A, and the permanent magnet synchronous motor with high power density and high efficiency for the vehicle is the section [0009 ].

The periphery of the inner end cover 40 is provided with a first connecting edge 42, the inner ring of the outer end cover 50 is provided with a second connecting edge 51, the first connecting edge and the second connecting edge are axially overlapped together, and the first connecting edge and the second connecting edge are connected through a plurality of threaded connectors 52; the threaded connecting piece is matched with an elastic gasket. Wherein the first connecting edge and the second connecting edge are axially overlapped, and the axial direction is the axial direction of the rotating shaft 10. The threaded connecting piece is matched with the elastic washer, so that deformation generated by the outer end cover and the inner end cover can be effectively absorbed, and the stability of the structures and the positions of other parts of the motor is ensured.

The housing 41 is integrally formed with the inner end cap 40, which may be cast or injection molded, which is advantageous for the strength of the inner end cap integral with the housing.

The outer shell 60 of the motor is connected to the periphery of the outer end cover 50, that is, the outer shell and the outer end cover are of a split structure, as shown in fig. 1, and are connected through a connecting piece, which is beneficial to absorbing deformation generated by the outer shell and the outer end cover. Alternatively, the outer end cap 50 is integrally formed with the housing 60 of the motor, as shown in fig. 2, which is beneficial to improving the strength of the outer end cap and reducing the installation steps of the motor.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. High rotational speed high current energy density PMSM, including end cover, stator (20), rotor (30), the rotor includes pivot (10), its characterized in that: the end cover is formed by splicing an inner end cover (40) and an outer end cover (50), the inner end cover is provided with a machine base (41), and the rotating shaft is arranged on the inner end cover.

2. The high-speed high-current energy density permanent magnet synchronous motor according to claim 1, wherein: the periphery of the inner end cover (40) is provided with a first connecting edge (42), the inner ring of the outer end cover (50) is provided with a second connecting edge (51), the first connecting edge and the second connecting edge are axially overlapped together, and the first connecting edge and the second connecting edge are connected through a plurality of threaded connecting pieces (52); the threaded connecting piece is matched with an elastic gasket.

3. The high-speed high-current energy density permanent magnet synchronous motor according to claim 1, wherein: the base (41) and the inner end cover (40) are integrally formed.

4. The high-speed high-current energy density permanent magnet synchronous motor according to claim 1, wherein: the outer periphery of the outer end cover (50) is connected with a shell (60) of the motor.

5. The high-speed high-current energy density permanent magnet synchronous motor according to claim 1, wherein: the outer end cover (50) is integrally formed with a motor housing (60).