Rotor punching sheet and high-voltage direct-drive permanent magnet motor thereof

Abstract

The utility model relates to a rotor punching sheet and a high-voltage direct-drive permanent magnet motor thereof. The rotor punching sheet comprises a body; the pull rod groove is formed in the body; a plurality of magnetic steel groove groups, wherein the plurality of magnetic steel groove groups are formed in the body; each magnetic steel groove group comprises a plurality of first magnetic steel grooves which are arranged in a straight line; the magnetic isolation bridges are arranged between every two adjacent first magnetic steel grooves; the second magnetic steel groove is communicated with the first magnetic steel groove at the end part and is provided with a magnetic isolation gap; the magnetic steel is embedded in the first magnetic steel groove and the second magnetic steel groove, the magnetic steel in the first magnetic steel groove and the magnetic steel in the second magnetic steel groove are separated through the magnetic isolation bridge, and the magnetic steel in the first magnetic steel groove and the magnetic steel in the second magnetic steel groove are subjected to magnetic isolation through the magnetic isolation gap, so that the embedded installation of the magnetic steel and the punching sheet can be realized; by arranging the limiting parts, the forming area of the magnetic isolation gaps is reduced, and the overall strength of the punching sheet is further improved.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a rotor punching sheet and a high-voltage direct-drive permanent magnet motor thereof. Background Art

[0002] In a high-voltage direct-drive permanent magnet motor, magnetic steel needs to be embedded in the rotor assembly to achieve rotation. In order to meet the performance and efficiency of the permanent magnet motor, such as the density of the breath magnetic field and the back electromotive force standard, more magnetic steel needs to be embedded in the punching sheet. However, as the number of magnetic steel increases, the number of magnetic steel slots opened on the punching sheet will also increase accordingly, so the overall strength of the punching sheet cannot be guaranteed, and the punching sheet is prone to deformation;

[0003] In summary, how to increase the strength of the punching sheet while meeting the number of embedded magnetic steels has become an urgent problem that researchers in this field need to solve. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to increase the strength of the punching sheet while satisfying the number of embedded magnetic steels;

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] The utility model is a rotor punching sheet, comprising: a main body; a pull rod slot, the main body is provided with the pull rod slot; a plurality of magnetic steel slot groups, the main body is provided with a plurality of magnetic steel slot groups; each of the magnetic steel slot groups comprises: a plurality of first magnetic steel slots arranged in a straight line; a magnetic isolation bridge, the magnetic isolation bridge is arranged between two adjacent first magnetic steel slots; a second magnetic steel slot, which is connected to the first magnetic steel slot at the end and is provided with a magnetic isolation gap.

[0007] In the present scheme, multiple first magnetic steel grooves are arranged horizontally in a straight line, and the two second magnetic steel grooves and the first magnetic steel groove at the end are arranged obliquely. The overall magnetic steel groove is approximately a U-shaped structure. The magnetic steel is embedded in the first magnetic steel groove and the second magnetic steel groove. The magnetic steel in the first magnetic steel groove is separated from the magnetic steel in the first magnetic steel groove by a magnetic isolation bridge, and the magnetic steel in the first magnetic steel groove and the magnetic steel in the second magnetic steel groove are magnetically isolated by a magnetic isolation gap (that is, magnetic isolation is achieved through air); in this way, the embedded installation of the magnetic steel and the punching sheet can be achieved.

[0008] In order to ensure the overall strength of the punching sheet, the utility model adopts the main body to extend to the magnetic isolation gap to set a limit portion; the limit portion has a supporting plane for supporting the magnetic steel;

[0009] A limiting portion is arranged between the first magnetic steel slot and the second magnetic steel slot, and a supporting plane is arranged at the end of the limiting portion. The magnetic steel can be offset against the supporting plane. The limiting portion also reduces the area of ​​the magnetic isolation gap, thereby improving the overall strength of the punching sheet.

[0010] In order to install the squirrel cage and facilitate the self-starting of the main shaft, the utility model adopts a method of arranging a plurality of squirrel cage grooves on the outer ring of the main body.

[0011] In order to illustrate the specific structure of the rotor assembly of the high-voltage direct-drive permanent magnet motor, the utility model adopts: a pull rod, which passes through the pull rod slot and locks and fixes the multiple stacked rotor punchings; a squirrel cage bar, which passes through the squirrel cage slot and is connected to the multiple stacked rotor punchings; a squirrel cage ring, which is fixed at the end of the squirrel cage bar;

[0012] In this way, a plurality of stacked punching sheets are connected by a pull rod, the cage bars pass through the cage slots, and the cage rings are arranged at the ends of the cage bars. The cage formed in this way cooperates with the rotor assembly to realize the self-starting of the rotor assembly.

[0013] The utility model has the following beneficial effects: the utility model is a rotor punching sheet and a high-voltage direct-drive permanent magnet motor thereof, a plurality of first magnetic steel slots arranged horizontally in a straight line, and an inclined arrangement between the two second magnetic steel slots and the first magnetic steel slot at the end, the overall magnetic steel slot is approximately a U-shaped structure, the magnetic steel is embedded in the first magnetic steel slot and the second magnetic steel slot, the magnetic steel in the first magnetic steel slot is separated from the magnetic steel in the first magnetic steel slot by a magnetic isolation bridge, the magnetic steel in the first magnetic steel slot is isolated from the magnetic steel in the second magnetic steel slot by a magnetic isolation gap, so that the embedded installation of the magnetic steel and the punching sheet can be realized, and the opening area of ​​the magnetic isolation gap is reduced by setting the limiting portion, thereby improving the overall strength of the punching sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the structure of the rotor punching;

[0016] Figure 2 yes Figure 1 A magnified view of point A;

[0017] Figure 3 It is a schematic diagram of the structure of the rotor assembly of a high-voltage direct-drive permanent magnet motor;

[0018] In the figure: 1-main body, 2-pull rod groove, 3-first magnetic steel groove, 4-magnetic isolation bridge, 5-magnetic isolation gap, 6-limiting part, 7-support plane, 8-squirrel cage groove, 9-pull rod, 10-squirrel cage bar, 11-squirrel cage ring, 12-magnetic steel groove group, 13-second magnetic steel groove. DETAILED DESCRIPTION

[0019] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0020] like Figure 1-2 As shown, the utility model is a rotor punching sheet, comprising: a body 1, the body 1 is a circular structure as a whole; a pull rod slot 2 is provided on the body 1, the function of the pull rod slot 2 is to allow the pull rod to pass through, and the pull rod connects multiple stacked punching sheets; multiple magnetic steel slot groups 12 are also provided on the body 1; in this embodiment, there are 6 magnetic steel slot groups 12, each magnetic steel slot group 12 includes: 3 first magnetic steel slots 3 arranged in a straight line; 2 magnetic isolation bridges 4, a magnetic isolation bridge 4 is arranged between two adjacent first magnetic steel slots 3; two second magnetic steel slots 13, which are connected to the first magnetic steel slots 3 at the end and are provided with magnetic isolation gaps 5; in this way, each magnetic steel slot group 12 is approximately a U-shaped structure, the first magnetic steel slots 3 have the same structure, and are all rectangular structures, and the second magnetic steel slots are rectangular structures and are arranged obliquely;

[0021] Specifically, the three first magnetic steel slots 3 arranged horizontally in a straight line and the first magnetic steel slots 3 at the two second magnetic steel slots 13 and the end are arranged obliquely, and the magnetic steel is embedded in the first magnetic steel slot 3 and the second magnetic steel slot 13. The magnetic steel in the first magnetic steel slot 3 is separated from the magnetic steel in the first magnetic steel slot 3 by a magnetic isolation bridge 4, and the magnetic steel in the first magnetic steel slot 3 is isolated from the magnetic steel in the second magnetic steel slot 13 by a magnetic isolation gap 5 (that is, magnetic isolation is performed through air); in this way, the embedded installation of the magnetic steel and the punching sheet can be realized;

[0022] Figure 1 The coil in the middle dashed line represents a magnetic steel slot group 12 . In this embodiment, a total of six magnetic steel slot groups 12 are provided.

[0023] like Figure 1-2 As shown, in order to ensure the overall strength of the punching sheet, the utility model adopts a limiting portion 6 extending from the main body 1 to the magnetic isolation gap 5; the limiting portion 6 has a supporting plane 7 for supporting the magnetic steel; the limiting portion 6 is arranged between the first magnetic steel groove 3 and the second magnetic steel groove 13 at the end, and the supporting plane 7 is arranged at both ends of the limiting portion 6. The magnetic steel can be offset against the supporting plane 7, and the limiting portion 6 also reduces the opening area of ​​the magnetic isolation gap 5, thereby improving the overall strength of the punching sheet.

[0024] like Figure 1 As shown, in order to install the squirrel cage and facilitate the self-starting of the main shaft, the utility model adopts a plurality of squirrel cage grooves 8 arranged on the outer ring of the body 1, and the squirrel cage grooves 8 are rectangular structures with an opening.

[0025] like Figure 3 As shown, in order to illustrate the specific structure of the rotor assembly of the high-voltage direct-drive permanent magnet motor, the utility model comprises: a pull rod 9, which passes through the pull rod slot 2 and locks and fixes a plurality of stacked rotor punchings; a squirrel cage bar 10, which passes through the squirrel cage slot 8 and is connected to a plurality of stacked rotor punchings; a squirrel cage ring 11, which is fixed to the end of the squirrel cage bar 10;

[0026] In this way, the plurality of stacked punching sheets are connected by the tie rod 9, the cage bars 10 pass through the cage slots 8, and the cage rings 11 are arranged at the ends of the cage bars 10. The cage formed in this way cooperates with the rotor assembly to realize the self-starting of the rotor assembly.

[0027] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rotor punching, characterized in that: include: ontology; A pull rod groove, the main body is provided with the pull rod groove; A plurality of magnetic steel slot groups, wherein the main body is provided with a plurality of the magnetic steel slot groups; Each of the magnetic steel slot groups comprises: A plurality of first magnetic steel slots arranged in a straight line; A magnetic isolation bridge is provided between two adjacent first magnetic steel slots; The second magnetic steel slot is connected to the first magnetic steel slot at the end and is provided with a magnetic isolation gap.

2. A rotor punching according to claim 1, characterized in that: The body is extended to the magnetic isolation gap to form a limiting portion; The limiting portion has a supporting plane for supporting the magnetic steel.

3. A rotor punching according to claim 1, characterized in that: A plurality of squirrel cage grooves are arranged at the outer ring of the main body.

4. A high voltage direct drive permanent magnet motor, comprising a rotor punching sheet according to any one of claims 1 to 3, characterized in that: Also includes: A pull rod passing through the pull rod slot and locking and fixing the plurality of stacked rotor punching sheets; A squirrel cage bar passing through the squirrel cage slot and connected to a plurality of stacked rotor punching sheets; A squirrel cage ring is fixed to the end of the squirrel cage bar.

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