CN216290555U - Permanent-magnet direct-drive electric roller - Google Patents
Permanent-magnet direct-drive electric roller Download PDFInfo
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- CN216290555U CN216290555U CN202122410519.5U CN202122410519U CN216290555U CN 216290555 U CN216290555 U CN 216290555U CN 202122410519 U CN202122410519 U CN 202122410519U CN 216290555 U CN216290555 U CN 216290555U
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Abstract
The utility model discloses a permanent-magnet direct-drive electric roller, which comprises a stator, a rotor, a roller, a stator supporting roller, two end covers, a cooling assembly and two supporting seats, wherein the stator is fixedly sleeved on the stator supporting roller, the rotor is sleeved on the stator, the roller is fixedly sleeved on the outer wall of the rotor, the two end covers are symmetrically and fixedly arranged at two ends of the rotor, the two end covers are rotatably connected with the stator supporting roller through bearings, two ends of the stator supporting roller are respectively rotatably connected with the two supporting seats, part of the cooling assembly is arranged on the stator supporting roller, and the other part of the cooling assembly is arranged on the rotor; the utility model utilizes the arranged cooling assembly to cool the stator and the rotor.
Description
Technical Field
The utility model relates to the field of electromechanics, in particular to a permanent-magnet direct-drive electric roller.
Background
At present, in traditional mechanical equipment, gear change and transmission mechanisms dominate, and a belt conveyor is one of main conveying devices of industrial enterprises such as mines, factories, wharfs and the like, and at present, a common belt conveyor still adopts the traditional method: the transmission mode of an asynchronous motor, a coupler, a reducer, a coupler and a driving roller → a transmission mode of an asynchronous motor, a coupler, a reducer and a driving roller → a transmission mode of a traditional driving system, wherein the loss of the asynchronous motor and the reducer is large, the energy efficiency is low, the overall efficiency of the system can only reach about 70%, the energy consumption accounts for about 30% of the whole system, the waste is serious, the environment problem is increasingly prominent along with the rapid development of the industrial technology, the coal mine industry is used as a high-energy-consumption and high-pollution industry and faces huge challenges of transformation and upgrading, the efficient transportation of ores is urgent, the existing belt conveyor obviously cannot meet the requirements of the current economic and social development, under the background, the safe, high-efficiency, energy-saving and environment-friendly permanent magnetic electric roller is produced, the common permanent magnetic electric roller at present easily generates a large amount of heat during working, and the permanent magnetic electric roller at present has no better heat dissipation mode, most of the water is directly led into the bracket of the stator, the heat dissipation efficiency is low, and parts are easy to rust.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the defects of the prior art are overcome, and the permanent magnet direct-drive electric roller is convenient to operate, safe, reliable, simple in structure and low in cost, can improve the heat dissipation efficiency of the permanent magnet direct-drive electric roller, and can avoid the corrosion inside the permanent magnet direct-drive electric roller.
In order to solve the technical problem, the technical scheme of the utility model is realized by the following modes: a permanent-magnet direct-drive electric roller comprises a stator, a rotor, a roller, a stator supporting roller, two end covers, a cooling assembly and two supporting seats, wherein the stator supporting roller comprises a central shaft, an outer sleeve and two supporting plates arranged at two ends of the outer sleeve, and the two supporting plates are fixedly connected with positions, close to the two ends, on the central shaft respectively;
the stator is fixedly sleeved on the outer wall of the outer sleeve, the rotor is sleeved on the stator, a gap is formed between the rotor and the stator, the roller is fixedly sleeved on the outer wall of the rotor, the two end covers are symmetrically and fixedly arranged at the two ends of the rotor, the two end covers are rotatably connected with the central shaft through bearings, and the two ends of the central shaft are respectively sleeved on the two supporting seats;
the cooling assembly comprises a first annular cylinder, a plurality of heat conducting fins, a second annular cylinder, two groups of air guide pipes, a plurality of fan blades and two filter plates, wherein the first annular cylinder and the second annular cylinder are both cylinders with two sealed ends and only provided with an inlet and an outlet;
the first annular cylinder is sleeved on the middle section of the central shaft, the first annular cylinder is fixedly connected with the central shaft, the second annular cylinder is sleeved on the inner wall of the outer sleeve and fixedly connected with the outer sleeve, one end of each of the plurality of heat-conducting fins is fixedly connected with the first annular cylinder, the other end of each of the plurality of heat-conducting fins is fixedly connected with the second annular cylinder, the plurality of heat-conducting fins are uniformly arranged at intervals along the circumferential direction, each group of air guide pipes comprises an inner pipe and an outer pipe, the inner pipe and the outer pipe are both conical, two groups of air guide pipes are respectively arranged at two ends of the first annular cylinder, in each group of air guide pipes, the small-diameter end of the inner pipe is fixedly connected with the first annular cylinder, the large-diameter end is fixedly connected with a corresponding support plate, the small-diameter end of the outer pipe 1 is fixedly connected with the second annular cylinder, the large-diameter end is fixedly connected with the corresponding support plate, a wind passing hole is arranged at the position, corresponding to the air guide pipe, and a plurality of fan blades are attached to the inner wall of the rotor along the circumferential direction and are close to the end part of the length direction, the two filter plates are respectively attached to the inner walls of the two end covers, and through holes are formed in the positions, corresponding to the filter plates, on the end covers;
the outlet of the first annular cylinder is communicated with the inlet of the second annular cylinder through a pipeline, the inlet of the first annular cylinder is communicated with an external water source through a pipeline, and the outlet of the second annular cylinder is communicated with an external water source through a pipeline.
The technical scheme of the utility model can absorb most of heat generated by the stator through the flowing water in the second annular cylinder, the flowing water is transmitted to the flowing water in the first annular cylinder through the heat-conducting plate, the heat is shared by the heat-conducting plate and the flowing water in the first annular cylinder, meanwhile, the outside air is sucked through the wind pressure generated by the synchronous rotation of the fan blades along with the rotor, part of the outside air passes through the gap between the stator and the rotor to take away part of the heat, part of the air flows into the air duct formed by the first annular cylinder, the plurality of heat-conducting fins and the second annular cylinder through the air guide pipe to take away most of the heat on the first annular cylinder, the plurality of heat-conducting fins and the second annular cylinder, and the first annular cylinder and the second annular cylinder are connected with an outside water source for circulating heat dissipation, multiple heat dissipation is realized, the heat dissipation efficiency is improved, and the water is separated from the stator supporting roller through the first annular cylinder and the second annular cylinder, avoiding the corrosion of parts such as the central shaft and the like.
The technical scheme of the utility model is further defined as follows:
a wiring groove is arranged at one end of the central shaft along the axial direction, and one end of the wiring groove is led out from the side wall of the central shaft along the radial direction; the other end of the central shaft along the axial direction is provided with a pipeline groove, and through holes which penetrate through the central shaft along the radial direction are arranged on the pipeline groove corresponding to the two ends of the first annular cylinder; through the wiring groove and the pipeline groove that set up, conveniently be first toroidal cylinder and second toroidal cylinder connecting tube, make things convenient for the circuit line to lay.
The inlet of the first annular cylinder penetrates through the through hole through a pipeline and extends into the pipeline groove, and extends out of one end of the pipeline groove to be connected with an external water source; the circulation rivers have improved the radiating efficiency.
The rotor is a permanent magnet rotor, and a plurality of magnetic steel bars are attached to the inner wall of the rotor; simple structure and low cost.
The first annular cylinder and the second annular cylinder are both made of insulating heat conduction materials; the first annular cylinder and the second annular cylinder are made of insulating materials, so that current can be prevented from being generated in the first annular cylinder and the second annular cylinder, water in the first annular cylinder and the second annular cylinder is decomposed, and the first annular cylinder and the second annular cylinder are corroded.
The utility model has the beneficial effects that: through the technical scheme of the utility model, the permanent magnet direct-drive electric roller can absorb most of heat generated by the stator through flowing water in the second annular cylinder, the flowing water is transmitted to the flowing water in the first annular cylinder through the heat-conducting plate, the heat is shared through the heat-conducting plate and the flowing water in the first annular cylinder, meanwhile, the fan blades synchronously rotate along with the rotor to generate wind pressure to suck outside air, part of the outside air passes through a gap between the stator and the rotor to take away part of the heat, part of the air flows into an air channel formed by the first annular cylinder, the plurality of heat-conducting fins and the second annular cylinder through the air guide pipe to take away most of the heat on the first annular cylinder, the plurality of heat-conducting fins and the second annular cylinder, and the first annular cylinder and the second annular cylinder are connected with an outside water source for circulating heat dissipation and heat dissipation, so that the heat dissipation efficiency is improved, the water is separated from the stator supporting roller, so that the corrosion of parts such as a central shaft and the like is avoided.
Drawings
FIG. 1 is a schematic view of the external structure of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is an axial view of the cross-sectional view shown in FIG. 3;
FIG. 5 is an enlarged partial view at B in bitmap 4;
wherein: 1-stator, 2-rotor, 3-roller, 4-stator support roller, 4 a-central shaft, 4 b-outer sleeve, 4 c-support plate, 5-end cover, 6-support seat, 7-bearing, 8-first annular cylinder, 9-heat conducting fin, 10-second annular cylinder, 12-air guide pipe, 12 a-inner pipe, 12 b-outer pipe, 13-fan blade, 14-filter plate, 15-air passing hole, 16-wiring groove, 17-wiring groove, 18-through hole and 19-magnetic steel strip.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention.
It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other, so that the specific meaning of the terms in the utility model can be understood by those skilled in the art.
Example 1
As shown in fig. 1, 3 and 5, the permanent magnet direct-drive electric roller comprises a stator 1, a rotor 2, a roller 3, a stator supporting roller 4, two end covers 5, a cooling assembly and two supporting seats 6, wherein the stator supporting roller 4 comprises a central shaft 4a, an outer sleeve 4b and two supporting plates 4c welded at two ends of the outer sleeve 4b, and the two supporting plates 4c are fixedly connected with the central shaft 4a at positions close to the two ends respectively through welding.
As shown in fig. 3, the stator 1 is fixedly sleeved on the outer wall of the outer sleeve 4b, the rotor 2 is sleeved on the stator 1, and a gap is formed between the rotor 2 and the stator 1, after the stator 1 and the rotor 2 are electrified, electromagnetic induction occurs between the stator 1 and the rotor 2, so that the rotor 2 rotates; the roller 3 is fixedly sleeved on the outer wall of the rotor 2, and when the rotor 2 rotates, the roller 3 synchronously rotates; the two end covers 5 are symmetrically and fixedly arranged at two ends of the rotor 2 through bolts, the two end covers 5 are rotationally connected with the central shaft 4a through bearings 7, and when the rotor 2 rotates, braking can be performed by limiting the end covers 5; two ends of the central shaft 4a are sleeved on the two supporting seats 6, and the whole body of the present embodiment is installed at a certain position through the two supporting seats 6.
In this embodiment, the stator 1 is a product known in the electromechanical field, and can be purchased directly.
As shown in fig. 5, the cooling assembly includes a first annular cylinder 8, a plurality of heat conducting fins 9, a second annular cylinder 10, two sets of air ducts 12, a plurality of fan blades 13 and two filter plates 14, wherein both ends of the first annular cylinder 8 and the second annular cylinder 10 are sealed, and only one inlet and one outlet are provided;
as shown in fig. 5, the first annular cylinder 8 is sleeved on the middle section of the central shaft 4a, and the first annular cylinder 8 is fixedly connected with the central shaft 4a and can be fixed by welding or bolt connection; the second annular cylinder 10 is sleeved on the inner wall of the outer sleeve 4b, and the second annular cylinder 10 is fixedly connected with the outer sleeve 4b and can be fixed in a welding or bolt connection mode;
one end of each of the plurality of heat-conducting fins 9 is fixedly connected with the first annular cylinder 8 in a welding manner, the other end of each of the plurality of heat-conducting fins 9 is fixedly connected with the second annular cylinder 10 in a welding manner, the plurality of heat-conducting fins 9 are uniformly arranged at intervals along the circumferential direction, and the second annular cylinder 10 absorbs part of heat generated by the stator 1 and transmits the heat to the first annular cylinder 8 through the heat-conducting fins 9, so that the heat is dispersed, the heat dissipation area is increased, and the heat dissipation efficiency is improved;
each group of air guide pipes 12 comprises an inner pipe 12a and an outer pipe 12b, the inner pipe 12a and the outer pipe 12b are both conical, the two groups of air guide pipes 12 are respectively arranged at two ends of a first annular cylinder 8, in each group of air guide pipes 12, the small-diameter end of the inner pipe 12a is fixedly connected with the first annular cylinder 8, the large-diameter end is fixedly connected with a corresponding support plate 4c, the small-diameter end of the outer pipe 12b is fixedly connected with a second annular cylinder 10, the large-diameter end is fixedly connected with the corresponding support plate 4c, an air passing hole 15 is arranged on each support plate 4c corresponding to the air guide pipe 12, a plurality of fan blades 13 are respectively attached to the inner wall of the rotor 2 along the circumferential direction and are close to the end part of the length direction, the two filter plates 14 are respectively attached to the inner walls of the two end covers 5, and through holes are arranged on the end covers 5 corresponding to the filter plates 14; when the rotor 2 rotates forwards, the fan blades 13 rotate synchronously along with the rotor 2, when the fan blades 13 rotate, wind pressure is generated, outside air flows into the permanent magnetic direct-drive electric roller through via holes in the end covers 5 close to the fan blades 13, after dust impurities and moisture are filtered by the filter plates 14, part of the air flows through a gap between the stator 1 and the rotor 2, so that part of heat is taken away, part of the air flows into an air channel formed by the first annular cylinder 8, the plurality of heat conducting fins 9 and the second annular cylinder 10 through the air guide pipe 12, part of the heat is taken away, and the air flows to the other end cover 5 through the wind pressure generated when the fan blades 13 rotate and flows out through via holes in the other end cover 5; when the rotor 2 rotates reversely, the outside air flows in through the through holes on the end cover 5 far away from the fan blades 13 and flows out through the through holes on the end cover 5 near the fan blades 13.
The outlet of the first annular cylinder 8 is communicated with the inlet of the second annular cylinder 10 through a pipeline, the inlet of the first annular cylinder 8 is communicated with an external water source through a pipeline, and the outlet of the second annular cylinder 10 is communicated with an external water source through a pipeline; the waterway pipeline has a simpler structure, is a widely applied known technology, and is not represented in the drawing; flowing water is injected into the first annular cylinder 8 and the second annular cylinder 10, and the heat dissipation efficiency is improved.
A wiring groove 16 is arranged at one end of the central shaft 4a along the axial direction, one end of the wiring groove 16 is led out from the radial side wall of the central shaft 4a, and a circuit wire can extend into the permanent magnet direct drive electric drum through the wiring groove 16; the other end of the central shaft 4a along the axial direction is provided with a pipeline groove 17, the pipeline groove 17 is provided with a through hole 18 which radially penetrates through the central shaft 4a at the position corresponding to the two ends of the first annular cylinder 8, and the waterway pipeline can be connected with the first annular cylinder 8 and the second annular cylinder 10 through the pipeline groove 17 and the through hole 18.
The inlet of the first annular cylinder 8 passes through the through hole 18 through a pipeline and extends into the pipeline groove 17, and extends out of one end of the pipeline groove 17 to be connected with an external water source, the outlet of the second annular cylinder 10 passes through the group of air guide pipes 12 through a pipeline and extends into the pipeline groove 17 through the through hole 18, and the pipeline extends out of one end of the pipeline groove 17 to be connected with the external water source; the heat absorbed by the first annular cylinder 8 and the second annular cylinder 10 is taken away by the water circulation, and the heat dissipation efficiency is improved.
The rotor 2 is a permanent magnet rotor, and a plurality of magnetic steel bars 19 are attached to the inner wall of the rotor; the first annular cylinder 8 and the second annular cylinder 10 are both made of insulating heat conducting materials.
The using process of the embodiment is as follows: when the permanent magnet direct-drive electric roller is used, an inlet of the first annular cylinder 8 is communicated with an external water source through a pipeline, an outlet of the second annular cylinder 10 is communicated with an external water source through a pipeline, and flowing water is injected into the first annular cylinder 8 and the second annular cylinder 10;
when the rotor 2 rotates forwards, the fan blades 13 rotate synchronously along with the rotor 2, when the fan blades 13 rotate, wind pressure is generated, outside air flows into the permanent magnetic direct-drive electric roller through via holes in the end covers 5 close to the fan blades 13, after dust impurities and moisture are filtered by the filter plates 14, part of the air flows through a gap between the stator 1 and the rotor 2, so that part of heat is taken away, part of the air flows into an air channel formed by the first annular cylinder 8, the plurality of heat conducting fins 9 and the second annular cylinder 10 through the air guide pipe 12, part of the heat is taken away, and the air flows to the other end cover 5 through the wind pressure generated when the fan blades 13 rotate and flows out through via holes in the other end cover 5; when the rotor 2 rotates reversely, the outside air flows in through the through holes on the end cover 5 far away from the fan blades 13 and flows out through the through holes on the end cover 5 near the fan blades 13.
The above embodiments are merely illustrative of the technical ideas of the present invention, and the technical ideas of the present invention and the modifications thereof based on the technical solutions are within the scope of the present invention.
Claims (5)
1. A permanent-magnet direct-drive electric roller is characterized by comprising a stator (1), a rotor (2), a roller (3), a stator supporting roller (4), two end covers (5), a cooling assembly and two supporting seats (6), wherein the stator supporting roller (4) consists of a central shaft (4a), an outer sleeve (4b) and two supporting plates (4c) arranged at two ends of the outer sleeve (4b), and the two supporting plates (4c) are respectively and fixedly connected with positions, close to two ends, on the central shaft (4 a);
the stator (1) is fixedly sleeved on the outer wall of the outer sleeve (4b), the rotor (2) is sleeved on the stator (1), a gap is formed between the rotor (2) and the stator (1), the roller (3) is fixedly sleeved on the outer wall of the rotor (2), the two end covers (5) are symmetrically and fixedly arranged at the two ends of the rotor (2), the two end covers (5) are rotatably connected with the central shaft (4a) through bearings (7), and the two ends of the central shaft (4a) are respectively sleeved on the two supporting seats (6);
the cooling assembly comprises a first annular cylinder (8), a plurality of heat conducting fins (9), a second annular cylinder (10), two groups of air guide pipes (12), a plurality of fan blades (13) and two filter plates (14), wherein the first annular cylinder (8) and the second annular cylinder (10) are both cylinders with two sealed ends and only provided with one inlet and one outlet;
the first annular cylinder (8) is sleeved on the middle section of the central shaft (4a), the first annular cylinder (8) is fixedly connected with the central shaft (4a), the second annular cylinder (10) is sleeved on the inner wall of the outer sleeve (4b), the second annular cylinder (10) is fixedly connected with the outer sleeve (4b), one ends of the heat conducting fins (9) are fixedly connected with the first annular cylinder (8), the other ends of the heat conducting fins are fixedly connected with the second annular cylinder (10), the heat conducting fins (9) are uniformly arranged at intervals along the circumferential direction, each group of air guide pipes (12) comprises an inner pipe (12a) and an outer pipe (12b), the inner pipe (12a) and the outer pipe (12b) are both conical, the two groups of air guide pipes (12) are respectively arranged at two ends of the first annular cylinder (8), in each group of air guide pipes (12), the small-diameter end of the inner pipe (12a) is fixedly connected with the first annular cylinder (8), the large-diameter end is fixedly connected with the corresponding supporting plate (4c), the small-diameter end of the outer pipe (12b) is fixedly connected with the second annular cylinder (10), the large-diameter end is fixedly connected with the corresponding supporting plate (4c), an air passing hole (15) is formed in the position, corresponding to the air guide pipe (12), of each supporting plate (4c), the fan blades (13) are attached to the inner wall of the rotor (2) along the circumferential direction and are close to the end part of the length direction, the two filter plates (14) are respectively attached to the inner walls of the two end covers (5), and through holes are formed in the positions, corresponding to the filter plates (14), of the end covers (5);
the outlet of the first annular cylinder (8) is communicated with the inlet of the second annular cylinder (10) through a pipeline, the inlet of the first annular cylinder (8) is communicated with an external water source through a pipeline, and the outlet of the second annular cylinder (10) is communicated with an external water source through a pipeline.
2. The permanent magnet direct drive electric drum according to claim 1, characterized in that: a wiring groove (16) is formed in one axial end of the central shaft (4a), and one end of the wiring groove (16) is led out from the radial side wall of the central shaft (4 a); the other end of the central shaft (4a) along the axial direction is provided with a pipeline groove (17), and the pipeline groove (17) is provided with a through hole (18) which penetrates through the central shaft (4a) along the radial direction corresponding to the positions of the two ends of the first annular cylinder (8).
3. The permanent magnet direct drive electric drum according to claim 2, characterized in that: the inlet of the first annular cylinder (8) penetrates through the through hole (18) through a pipeline to extend into the pipeline groove (17) and is connected with an external water source through the extension of one end of the pipeline groove (17), the outlet of the second annular cylinder (10) penetrates through the group of air guide pipes (12) through the pipeline and penetrates through the through hole (18) to extend into the pipeline groove (17), and the pipeline extends out of one end of the pipeline groove (17) and is connected with the external water source.
4. The permanent magnet direct drive electric drum according to claim 1, characterized in that: the rotor (2) is a permanent magnet rotor, and a plurality of magnetic steel bars (19) are attached to the inner wall of the rotor.
5. The permanent magnet direct drive electric drum according to claim 1, characterized in that: the first annular cylinder (8) and the second annular cylinder (10) are both made of insulating heat conduction materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122410519.5U CN216290555U (en) | 2021-09-30 | 2021-09-30 | Permanent-magnet direct-drive electric roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122410519.5U CN216290555U (en) | 2021-09-30 | 2021-09-30 | Permanent-magnet direct-drive electric roller |
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| Publication Number | Publication Date |
|---|---|
| CN216290555U true CN216290555U (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122410519.5U Active CN216290555U (en) | 2021-09-30 | 2021-09-30 | Permanent-magnet direct-drive electric roller |
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| CN (1) | CN216290555U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825767A (en) * | 2022-04-29 | 2022-07-29 | 江苏嘉轩智能工业科技股份有限公司 | Electric roller of internal and external circulation air cooling rotor |
| CN115818126A (en) * | 2023-02-23 | 2023-03-21 | 江苏万基传动科技有限公司 | Permanent magnet direct-drive electric roller with local deformation compensation function |
-
2021
- 2021-09-30 CN CN202122410519.5U patent/CN216290555U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114825767A (en) * | 2022-04-29 | 2022-07-29 | 江苏嘉轩智能工业科技股份有限公司 | Electric roller of internal and external circulation air cooling rotor |
| CN114825767B (en) * | 2022-04-29 | 2022-09-27 | 江苏嘉轩智能工业科技股份有限公司 | Electric roller with internal and external circulation air-cooled rotor |
| CN115818126A (en) * | 2023-02-23 | 2023-03-21 | 江苏万基传动科技有限公司 | Permanent magnet direct-drive electric roller with local deformation compensation function |
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