WO2023092891A1

WO2023092891A1 - Rotor assembly of disc motor, and disc motor

Info

Publication number: WO2023092891A1
Application number: PCT/CN2022/079844
Authority: WO
Inventors: 肖锐
Original assignee: 中山大洋电机股份有限公司
Priority date: 2021-11-29
Filing date: 2022-03-09
Publication date: 2023-06-01
Also published as: CN216530782U

Abstract

Disclosed in the present utility model are a rotor assembly of a disc motor, and the disc motor. The rotor assembly comprises a rotor core and a plurality of brick-shaped magnetic shoes; a plurality of magnetic steel chambers distributed at intervals in the circumferential direction are formed on the rotor core; a central hole is formed in the center of the rotor core; the magnetic steel chambers are communicated with the central hole; the magnetic shoes are nested in the magnetic steel chambers; the magnetic steel chambers are arranged along a radial line S or inclines by an angle α with respect to the radial line S. The length L1 of the magnetic shoes is greater than the length L2 of the magnetic steel chambers. In the case that the height and the thickness of the rotor core are not changed, the structural deployment can further improve a magnetism gathering effect of a motor, increase the torque density of the motor, achieve a light and small size, and greatly reduce the motor cost.

Description

A rotor assembly of a disc motor and the disc motor

Technical field:

The utility model relates to a rotor assembly of a disc motor and the disc motor.

Background technique:

The axial magnetic disc permanent magnet synchronous motor in the prior art is being used more and more because of its high power density, light weight and small size, such as in the traction motor of new energy vehicles. In this existing motor structure, most of the rotor magnetic steel layout adopts the surface-mounted magnetic steel structure axial magnetic field, and a small part adopts the SPOKE magnetic pole structure. For the disc motor rotor with structure, the height of the rotor core is similar to the height of the magnetic tile. It is necessary to improve the magnetic concentration effect, and the height of the rotor core needs to be increased, resulting in an increase in the thickness and weight of the rotor core, which makes the motor bulky and expensive, and reduces the motor market. Competitiveness.

Invention content:

The purpose of this utility model is to provide a rotor assembly of a disc motor and a disc motor, which can solve the problem that the height of the rotor core is similar to the height of the magnetic tile in the prior art, and it is necessary to improve the magnetic concentration effect and the height of the rotor core needs to be increased. , leading to the increase in the thickness and weight of the rotor core, making the motor volume, high cost, and technical problems that reduce the market competitiveness of the motor.

The purpose of this utility model is achieved through the following technical solutions.

The purpose of this utility model is to provide a rotor assembly of a disc motor, which includes a rotor core and several brick-shaped magnetic tiles. The rotor core is provided with a number of magnetic steel grooves distributed along the circumferential interval. A central hole is dug out in the center of the center, the magnetic steel groove is connected with the central hole, the magnetic tile is nested in the magnetic steel groove, and the magnetic steel groove is arranged along the radial line S or inclined at an angle α with the radial line S, and is characterized in that: The length L1 of the magnetic tile is greater than the length L2 of the magnetic steel groove.

The inner end of the above-mentioned magnetic tile protrudes from the inner side wall of the rotor core and extends into the center hole.

The outer ends of the magnetic tiles protrude from the outer wall of the rotor core and extend to the outside of the rotor core.

The above-mentioned axial height L3 of the magnetic tile is greater than the axial height L4 of the rotor core.

At least one end of the above-mentioned magnetic tile axially protrudes from the end face of the rotor core.

The aforementioned angle α ranges from 0° to 30°.

The rotor core mentioned above is made of SMC material or silicon steel sheet.

The above-mentioned length L5 of the magnetic tile protruding from the inner side wall of the rotor core to the center hole does not exceed 1/5 of the length L1 of the entire magnetic tile.

A disc motor, comprising a stator assembly and a rotor assembly, characterized in that the rotor assembly is the rotor assembly of the disc motor described above.

Compared with the prior art, the utility model has the following effects:

1) A rotor assembly of a disc motor, including a rotor core and a number of brick-shaped magnetic tiles. The rotor core is provided with a number of magnetic steel grooves distributed along the circumferential interval. The center of the rotor core is dug out with The central hole, the magnetic steel groove is connected with the central hole, the magnetic tile is nested in the magnetic steel groove, the magnetic steel groove is arranged along the radial line S or inclined at an angle α with the radial line S, and the characteristic is that the length of the magnetic tile is L1 Longer than the length L2 of the magnetic steel slot, this structure arrangement can further improve the magnetism gathering effect of the motor and improve the torque density of the motor under the condition that the height and thickness of the rotor iron core remain unchanged. The volume is light and small, which greatly reduces the cost of the motor.

2) Other advantages of the present utility model are described in detail in the embodiment section.

Description of drawings:

Fig. 1 is a perspective view provided by Embodiment 1 of the utility model;

Fig. 2 is an exploded view provided by Embodiment 1 of the utility model;

Fig. 3 is a side view provided by Embodiment 1 of the utility model;

Fig. 4 is the sectional view of A-A among Fig. 3;

Fig. 5 is a schematic structural diagram provided by Embodiment 1 of the present utility model;

Fig. 6 is a perspective view provided by Embodiment 2 of the present invention;

Fig. 7 is an exploded view provided by the second embodiment of the utility model;

Fig. 8 is a side view provided by the second embodiment of the utility model;

Fig. 9 is a sectional view of A-A in Fig. 3;

Fig. 10 is a schematic structural diagram provided by Embodiment 2 of the present utility model.

Detailed ways:

The utility model will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

Embodiment one:

As shown in Figures 1 to 5, this embodiment provides a rotor assembly for a disc motor, including a rotor core 1 and several brick-shaped magnetic tiles 2, and the rotor core 1 is provided with several To the magnetic steel grooves 11 distributed at intervals, a central hole 10 is dug out in the center of the rotor core 1, the magnetic steel groove 11 communicates with the central hole 10, the magnetic tile 2 is nested in the magnetic steel groove 11, and the magnetic steel groove 11 is along the diameter Layout to the line S, characterized in that: the length L1 of the magnetic tile 2 is greater than the length L2 of the magnetic steel groove 11, and this structure arrangement can further improve the magnetic field gathering effect of the motor and improve the Excellent torque density, light and small size, greatly reducing the cost of the motor.

The inner end 21 of the above-mentioned magnetic tile 2 protrudes from the inner side wall 12 of the rotor core 1 and extends into the center hole 10, which can improve the magnetization effect of the motor and increase the torque density of the motor.

The outer end 22 of the above-mentioned magnetic tile 2 protrudes from the outer wall 13 of the rotor core 1 and extends to the outside of the rotor core 1, which can improve the magnetic flux gathering effect of the motor and increase the torque density of the motor.

The above-mentioned axial height L3 of the magnetic tile 2 is greater than the axial height L4 of the rotor core 1, which can further improve the magnetic flux gathering effect of the motor and increase the torque density of the motor.

At least one end of the magnetic tile 2 axially protrudes from the end face 100 of the rotor core 1, which can improve the magnetic flux gathering effect of the motor and increase the torque density of the motor.

The above-mentioned rotor core 1 is made of SMC material or silicon steel sheet.

The above-mentioned magnetic tile 2 protrudes from the inner wall 12 of the rotor core 1 and extends into the central hole 10 with a length L5 not exceeding 1/5 of the length L1 of the entire magnetic tile 2 .

Embodiment two:

As shown in Figures 6 to 10, this embodiment provides a rotor assembly of a disc motor, including a rotor core 1 and several brick-shaped magnetic tiles 2, and the rotor core 1 is provided with several To the magnetic steel grooves 11 distributed at intervals, a central hole 10 is dug out in the center of the rotor core 1, the magnetic steel groove 11 communicates with the central hole 10, the magnetic tile 2 is nested in the magnetic steel groove 11, and the magnetic steel groove 11 is along the diameter An angle α layout inclined to the line S is characterized in that the length L1 of the magnetic tile 2 is greater than the length L2 of the magnetic steel groove 11, and this structure can further improve the magnetic field concentration of the motor when the height and thickness of the rotor core remain unchanged. As a result, the torque density of the motor is improved, the volume is light and small, and the cost of the motor is greatly reduced.

The aforementioned angle α ranges from 0° to 30°.

Embodiment three:

A disc motor, comprising a stator assembly and a rotor assembly, characterized in that: the rotor assembly is the rotor assembly of the disc motor described in Embodiment 1 or Embodiment 2.

The above embodiment is a preferred embodiment of the present utility model, but the embodiment of the present utility model is not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present utility model are all acceptable. All equivalent replacement methods are included in the protection scope of the present utility model.

Claims

A rotor assembly of a disc motor, comprising a rotor core (1) and several brick-shaped magnetic tiles (2), the rotor core (1) is provided with a number of magnetic steel slots (11) spaced along the circumferential direction ), the center of the rotor core (1) is dug out with a central hole (10), the magnetic steel groove (11) communicates with the central hole (10), the magnetic tile (2) is nested in the magnetic steel groove (11), and the magnetic steel groove (11) is The steel groove (11) is arranged along the radial line S or inclined at an angle α to the radial line S, and is characterized in that the length L1 of the magnetic shoe (2) is greater than the length L2 of the magnetic steel groove (11).
The rotor assembly of a disc motor according to claim 1, characterized in that: the inner end (21) of the magnetic tile (2) protrudes from the inner side wall (12) of the rotor core (1) and extends to the center hole ( 10) Inside.
The rotor assembly of a disc motor according to claim 2, characterized in that: the outer end (22) of the magnetic shoe (2) protrudes from the outer wall (13) of the rotor core (1) and extends to the rotor core (1) External.
The rotor assembly of a disc motor according to claim 1, 2 or 3, characterized in that: the axial height L3 of the magnetic shoe (2) is greater than the axial height L4 of the rotor core (1).
The rotor assembly of a disc motor according to claim 4, characterized in that at least one end of the magnetic shoe (2) axially protrudes from the end face (100) of the rotor core (1).
The rotor assembly of a disc motor according to claim 5, wherein the angle α ranges from 0° to 30°.
The rotor assembly of a disc motor according to claim 6, characterized in that: the rotor core (1) is made of SMC material or silicon steel sheet.
A rotor assembly of a disc motor according to claim 1, 2 or 3, characterized in that: the magnetic tile (2) protrudes from the inner side wall (12) of the rotor core (1) and extends to the center hole (10) The length L5 inside is no more than 1/5 of the length L1 of the entire magnetic tile (2).
A disc motor, comprising a stator assembly and a rotor assembly, wherein the rotor assembly is the rotor assembly of any one of claims 1 to 8.