Rotor of electric machine
By setting the winding plate and support rib in the coil-trough section of the motor rotor, the orderly winding and high filling coefficient design of the coil are achieved, which solves the problems of insufficient coil winding and insufficient filling coefficient in the prior art, and improves the speed load support capacity and copper filling coefficient.
Patent Information
- Application Number
- CN202380066947.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-09-19
- Filing Date
- 2023-07-24
- Publication Date
- 2025-04-25
AI Technical Summary
The coil winding method of existing motor rotors is not orderly enough, resulting in unbalanced speed load and lack of a high filling coefficient design.
A winding plate is provided in the coil-trough section of the coil, using these winding plates to form a winding chamber, and the coil is supported by a supporting rib, especially in the upper winding layer, to achieve a higher filling coefficient.
Through ordered coil winding and high filling coefficient design, the rotor speed load support capacity is improved, and the high copper filling coefficient in the pole groove is achieved.
Smart Images
Figure CN119895702A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a rotor for an electric machine according to the preamble of the main claim. Background Art
[0002] A rotor of an electric motor is known from JP9215240 A2, which has a rotor axis and a plurality of salient poles arranged in the circumferential direction of the rotor, with pole slots formed between the salient poles for arranging electrical conductors of a rotor winding, wherein the salient poles have pole shoes at the radially outer extreme poles, wherein the salient poles are respectively surrounded by coils of the rotor winding, in particular a single coil, wherein each coil has two coil-slot sections extending in the pole slots and a plurality of winding layers. Summary of the invention
[0003] The rotor of the electric machine according to the invention having the features of the characterizing part of the main claim thus has the advantage that the coils in the upper winding layer can be wound in a more orderly manner and are better supported with regard to the speed load. In the lower winding layer of the respective coil, due to the rectangular coil cross section, no supporting ribs are required for orderly winding, so that due to the lack of supporting ribs there, a particularly high filling factor, in particular a copper filling factor, can be achieved in the pole slots.
[0004] According to the present invention, this is achieved in the following manner: a winding plate is respectively arranged between the uppermost and lowermost winding layers in the coil-slot section of the corresponding coil, the winding plate having a plurality of supporting ribs on the outer side facing away from the corresponding salient pole for forming a winding chamber, and the winding plate is especially made of plastic, and the lower winding layer of the corresponding coil is arranged below the two winding plates, and the upper winding layer of the corresponding coil is arranged in the winding chamber above the two winding plates.
[0005] Advantageous embodiments and improvements of the rotor of the electric machine specified in the main claim are made possible by the measures listed in the dependent claims.
[0006] It is particularly advantageous if the height of the supporting ribs of the respective winding plate measured in the circumferential direction increases radially outwards relative to the rotor axis. In this way, a coil cross section which deviates from a rectangular shape, for example a trapezoidal or triangular shape, can be wound in an orderly manner in the upper winding layer of the respective coil, thereby making it possible to achieve a particularly high filling factor in the pole slot. In particular, the coil can extend in the upper winding layer in the circumferential direction of the rotor over the respective pole shoe.
[0007] It is further advantageous that a sleeve-shaped coil support made of plastic is provided on each salient pole, on which a coil receptacle for accommodating the corresponding coil is formed. In this way, the coils of the rotor winding are electrically insulated from the salient poles. No additional insulating components, such as insulating paper, are required.
[0008] It is very advantageous that the coil receiving portion is formed along the receiving base of the coil support between two annular flanges of the coil support. In this way, the corresponding coil can be received between the annular flanges.
[0009] It is also advantageous if the winding plate is fastened to the respective coil support, in particular to the annular flange, or directly to the respective salient pole, in particular in a form-fitting and / or force-fitting and / or material-fitting manner, so that the supporting ribs of the winding plate can absorb speed loads.
[0010] Furthermore, it is advantageous if at least one groove-shaped contour is formed at the receiving base of the respective coil support and / or at the base of the winding chamber for the orientation of the winding of the respective coil. In this way, the lowest layer of the lower winding layer and the lowest layer of the upper winding layer can be positioned exactly, so that a high filling factor in the pole slot and a symmetrical or orderly winding pattern can be achieved.
[0011] The winding plates advantageously extend in the respective pole slots in the axial direction with respect to the rotor axis and are spaced apart from the side surfaces of the respective salient poles. The winding plates are arranged only in the pole slots and explicitly do not extend into the winding head region.
[0012] Advantageously, a slot slit is formed between adjacent pole shoes as a radial opening of the corresponding pole slot, wherein a slot closure is provided in each slot slit. In this way, the rotor winding can be additionally supported against the acting centrifugal forces.
[0013] According to an advantageous embodiment, the salient poles can be separate bodies which are fastened to a pole support, in particular to a rotor shaft, in particular in a form-fitting and / or force-fitting manner. In this way, a particularly high conductor filling factor, in particular a copper filling factor, can be achieved in the rotor slots.
[0014] Alternatively, the salient poles can be connected integrally to the rotor yoke to form a rotor laminated core, wherein the pole shoes are separate bodies which are fixed to the salient poles in a form-fitting manner.
[0015] Furthermore, the invention relates to an electric machine having a rotor according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Exemplary embodiments of the invention are shown in simplified form in the drawings and are explained in more detail in the following description.
[0017] The accompanying drawings show:
[0018] Figure 1 shows a partial cross-sectional view of a rotor having salient poles according to the present invention,
[0019] Figure 2 Shown according to Figure 1 one of the salient poles according to the present invention,
[0020] Figure 3 Another view shows the Figure 2 salient pole. DETAILED DESCRIPTION
[0021] Figure 1 A partial cross-sectional view of a rotor having salient poles according to the present invention is shown.
[0022] The rotor 1 according to the present invention of an electric machine (for example, an electrically excited synchronous machine) can rotate around a rotor axis 2 and includes a plurality of salient poles 3 arranged in the circumferential direction of the rotor 1, and pole slots 4 are formed between the salient poles for arranging electrical conductors of a rotor winding 5. The salient poles 3 have pole shoes 6 at the extreme poles radially outside with respect to the rotor axis 2. The salient poles 3 are respectively surrounded by coils 7 of the rotor winding 5, in particular a single coil. Each coil 7 has two coil-slot sections 7n extending in the pole slot 4 and two coil-winding head sections extending outside the pole slot 4. In addition, each coil 7 has a plurality of winding layers 8.
[0023] According to the present invention, a winding plate 10 is provided between the uppermost 8a and the lowermost 8i winding layers 8 in the coil-slot section 7n of the corresponding coil 7, the winding plate having a plurality of supporting ribs 11 on the outer side facing away from the corresponding salient pole 3 for forming a winding chamber 12, and the winding plate is made of plastic in particular. According to the present invention, it is further provided that the lower winding layer 8 of the corresponding coil 7 is provided below the two winding plates 10 of the corresponding salient pole 3, and the upper winding layer 8 of the corresponding coil 7 is provided in the winding chamber 12 above the two winding plates 10.
[0024] The height h of the supporting ribs 11 of the respective winding sheet 10 measured in the circumferential direction can increase radially outwards relative to the rotor axis 2 .
[0025] For example, a sleeve-shaped coil support 15 made of plastic is provided on each salient pole 3, and a coil receiving portion 16 is formed on the coil support for receiving the corresponding coil 7. The coil support 15 is, for example, molded or cast on the corresponding salient pole 3. The coil receiving portion 16 can be formed between two annular flanges 18 of the coil support 15 along a receiving base 17 of the coil support 15.
[0026] The winding plate 10 can be fastened, for example, in a form-fitting and / or force-fitting and / or materially fastened manner to the corresponding coil support 15 , in particular to the annular flange 18 , or directly to the corresponding salient pole 3 .
[0027] For example, a slot slit 20 is formed between adjacent pole shoes 6 as a radial opening of the corresponding pole slot 4 , wherein a slot closure 21 is arranged in each of the slot slits 20 .
[0028] According to this embodiment, the salient pole 3 is a separate body, which is fixed to the pole support 23, especially to the rotor shaft, especially in a form-fitting and / or force-fitting manner. Alternatively, the salient pole 3 can also be integrally connected to the rotor yoke to form a rotor laminated core, and the pole shoe 6 can be a separate body, which is fixed to the salient pole 3 in a form-fitting manner. According to this embodiment, the salient poles 3 each have a pole anchor 24, wherein the pole anchor 24 of the salient pole 3 can be pushed into the anchoring groove 25 of the pole support 23 in the axial direction relative to the rotor axis 2.
[0029] Figure 2 Shown according to Figure 1 One of the salient poles according to the present invention is without a corresponding coil 7 . Figure 3 Another view shows the Figure 2 salient pole.
[0030] The winding plates 10 extend in the axial direction about the rotor axis 2 in the corresponding pole slots 4 and are respectively spaced a distance s from the side surfaces of the corresponding salient poles 3. For example, the winding plates 10 are respectively arranged parallel to the side surfaces of the corresponding salient poles 3.
[0031] A groove-like contour 19 for the alignment of the winding of the respective coil 7 can be formed on the receiving base 17 of the respective coil support 15 and / or on the base of the winding chamber 12 over the entire circumference or over a circumferential section.
Claims
1. A rotor (1) of an electric machine, in particular an electrically excited synchronous machine, the rotor having a rotor axis (2) and a plurality of salient poles (3) arranged in the circumferential direction of the rotor (1), pole slots (4) being formed between the salient poles for arranging electrical conductors of a rotor winding (5), wherein the salient poles (3) have pole shoes (6) at the radially outer pole ends, wherein the salient poles (3) are respectively surrounded by coils (7), in particular individual coils, of the rotor winding (5), wherein each coil (7) has two coil-slot sections (7n) extending in the pole slots (4) and a plurality of winding layers (8), It is characterized in that In the coil-slot section (7n) of the corresponding coil (7), a winding plate (10) is respectively arranged between the uppermost (8a) and lowermost (8i) winding layers (8), the winding plate having a plurality of supporting ribs (11) on the outer side facing away from the corresponding salient pole (3) for forming a winding chamber (12), and the winding plate is especially made of plastic, and the lower winding layer of the corresponding coil (7) is arranged below the two winding plates (10), and the upper winding layer of the corresponding coil (7) is arranged in the winding chamber (12) above the two winding plates (10).
2. The rotor according to claim 1, characterized in that The height (h) of the support ribs (11) of the respective winding plates (10), measured in the circumferential direction, increases radially outwards relative to the rotor axis (2).
3. A rotor according to any one of the preceding claims, characterised in that A sleeve-shaped coil support (15) made of plastic is provided on each salient pole (3), on which a coil receptacle (16) for receiving a corresponding coil (7) is formed.
4. The rotor according to claim 3, characterized in that The coil accommodating portion (16) is formed between two annular flanges (18) of the coil support (15) along a accommodating base (17) of the coil support (15).
5. A rotor according to any one of the preceding claims, characterised in that The winding plate (10) is fixed to the corresponding coil support (15), in particular to the annular flange (18), or directly to the corresponding salient pole (3), in particular in a form-fitting and / or force-fitting and / or material-fitting manner.
6. A rotor according to any one of claims 3 to 5, characterised in that At least one groove-shaped contour is formed on the receiving base (17) of the respective coil support (15) and / or on the base of the winding chamber (12) for the orientation of the winding of the respective coil (7).
7. A rotor according to any one of the preceding claims, characterised in that The winding plates (10) extend in the axial direction about the rotor axis (2) in the corresponding pole slots (4) and have a distance (s) from the side surface of the corresponding salient pole (3).
8. A rotor according to any one of the preceding claims, characterised in that A slot slit (20) is formed between adjacent pole shoes (6) as a radial opening of the corresponding pole slot (4), wherein slot closures (21) are arranged in the slot slits (20).
9. A rotor according to any one of the preceding claims, characterised in that a. The salient pole (3) is a separate body, which is fixed to the pole support (23), in particular to the rotor shaft, in particular in a form-fitting and / or force-fitting manner, b. The salient pole (3) is integrally connected to the rotor yoke to form a rotor laminated core, wherein the pole shoe (6) is a separate body portion that is fixed to the salient pole (3) in a form-fitting manner.
10. Electric machine having a rotor (1) according to one of the preceding claims.