CN211089349U - High-power-density low-speed large-torque permanent magnet synchronous motor - Google Patents
High-power-density low-speed large-torque permanent magnet synchronous motor Download PDFInfo
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- CN211089349U CN211089349U CN201922400529.3U CN201922400529U CN211089349U CN 211089349 U CN211089349 U CN 211089349U CN 201922400529 U CN201922400529 U CN 201922400529U CN 211089349 U CN211089349 U CN 211089349U
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Abstract
A high-power-density low-speed large-torque permanent magnet synchronous motor belongs to the technical field of large-torque permanent magnet synchronous motors. The planetary reducer is directly connected with a low-speed large-torque permanent magnet synchronous motor through a spline, an inner ring of a bearing is connected with the front end of a rotating shaft at the center of the motor, an outer ring of the bearing is connected with a front end cover, the rear end of the rotating shaft at the center of the motor is connected with a rear end cover through the bearing, a machine shell is fixed between the outer end of the front end cover and the outer end of the rear end cover, a stator assembly is fixed in the machine shell, a rotor assembly is fixed on a magnetism isolating sleeve through bolts, the magnetism isolating sleeve is matched with the rotating shaft at the center of the motor, an outer gear ring is meshed with a planet wheel, the planet wheel, a planet carrier and the bearing form, the planetary reducer is mutually matched with a spigot of a shell of the low-speed large-torque permanent magnet synchronous motor and a spline of a rotating shaft at the center of the motor through a retainer flange and an inner gear ring of a sun gear to form a whole transmission system.
Description
Technical Field
The utility model relates to a high power density low-speed big moment of torsion permanent magnet synchronous motor belongs to big moment of torsion permanent magnet synchronous motor technical field.
Background
The drive mode of the high torque load basically has two forms: firstly, in a mode of 'asynchronous motor + hydraulic coupler + brake + speed reducer', the transmission chain of the whole transmission system is longer and is an independent system, so that the number of potential fault nodes is large, the occupied space is large, and the use and the maintenance are inconvenient; and secondly, the permanent magnet direct drive motor is directly connected with the load, and the direct drive permanent magnet synchronous motor of the transmission system has large volume, high weight and small output per unit volume, and is not beneficial to being used in a narrow space.
The traditional low-speed large-torque permanent magnet synchronous motor has large volume and high weight, and the small-volume low-speed large-torque permanent magnet synchronous motor has the problem of insufficient output, so that the application range of the low-speed large-torque permanent magnet synchronous motor is limited to a certain extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that above-mentioned prior art exists, and then provide a high power density low-speed big moment of torsion permanent magnet synchronous motor.
The utility model aims at realizing through the following technical scheme:
a high power density, low speed, high torque permanent magnet synchronous motor comprising: the planetary reducer is directly connected with the low-speed high-torque permanent magnet synchronous motor through a spline, the inner ring of the bearing is connected with the front end of the rotating shaft in the center of the motor, the outer ring of the bearing is connected with the front end cover, the rear end of the rotating shaft in the center of the motor is connected with the rear end cover through the bearing, and a sealing element is arranged in the bearing; a shell is fixed between the outer end of the front end cover and the outer end of the rear end cover, a stator assembly is fixed in the shell, a rotor assembly is fixed on a magnetism isolating sleeve through bolts, the magnetism isolating sleeve is matched with a rotating shaft at the center of the motor, an inner gear ring is arranged in a sun gear and is in spline fit connection with the rotating shaft at the center of the motor, an outer gear ring is meshed with a planet wheel, the planet wheel, a planet carrier and a bearing form a planet mechanism and are positioned through tooth fit with the outer gear ring, the outer gear ring is fixed on a retainer through bolt connection, and a planet reducer is matched with a spigot of the shell of the low-speed large-torque permanent magnet synchronous motor and a spline of the rotating shaft at the center.
The utility model discloses use high performance low-speed big moment of torsion permanent magnet synchronous motor as the core to optimize coupling mechanical transmission unit, whole transmission system compares traditional three-phase asynchronous motor low-speed actuating system and permanent magnet machine direct drive system and compares and possess following advantage:
1. energy conservation and high efficiency. Compared with the traditional three-phase asynchronous motor, the system has no rotor copper loss or low aluminum wind loss abrasion, the stator copper loss is small, the power factor can reach 0.93-0.98, the overall efficiency can reach more than 95%, and the power saving rate is more than 20%.
2. Compact structure, small volume, light weight, easy installation and space saving. Compared with the traditional driving system of 'asynchronous motor + hydraulic coupler + brake + speed reducer', the utility model shortens the transmission chain, and the volume and weight can be reduced by 1/2-1/3; compared with a permanent magnet direct drive motor, the size and the weight are reduced by 1/2-1/4, and the height of the center of the machine base is reduced by 2-3 machine base numbers compared with the permanent magnet direct drive motor. Therefore, the low-speed large-torque permanent magnet motor driving system is suitable for being used under various working conditions and the condition that the installation space is limited.
3. Large starting torque and strong overload capacity. Compared with a permanent magnet direct drive motor, the permanent magnet direct drive motor has the advantages of small volume, light weight, more compact structure, small rotor moment of inertia of the system, higher motor power density and torque density, quick dynamic response and stronger overload and heavy-load soft starting capability, and overcomes the defect of insufficient heavy-load starting capability of the permanent magnet direct drive motor. Under the same power, the efficiency and the power factor can be kept extremely high within 20-120% of the load rate, and the output torque is 25-30% higher than that of a direct drive motor.
4. High safety and reliability and less maintenance workload. Compared with the traditional asynchronous motor driving system, the high-speed part of a transmission chain which is easy to lose efficacy is removed, the whole system runs at low speed, and the reliability is greatly improved; compared with a permanent magnet direct drive motor, the structure that the motor is coupled with the torque amplifier unit is adopted, the outer diameter of the rotor is reduced, and therefore the stability and the reliability of the rotation of the rotor are improved; the whole system is reasonable in design, the technology of each coupling unit is mature, the service coefficient is large, the stability is high, and the workload of future maintenance is greatly reduced (basically maintenance-free).
5. Energy-saving and material-reducing, and high product cost performance. Compared with a permanent magnet direct drive motor, the material consumption is effectively reduced, the material utilization rate is reduced by more than 20% compared with the permanent magnet direct drive motor, and the product cost performance is obviously improved.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention.
Fig. 2 is a structural diagram of a spline connection part of a low-speed large-torque permanent magnet synchronous motor part and a planetary reducer.
Fig. 3 is a structural view of a low-speed large-torque permanent magnet synchronous motor portion.
Fig. 4 is a structural view of a planetary reducer portion.
In the drawing, reference numerals, 1 denotes a planetary reducer, 2 denotes a low-speed high-torque permanent magnet synchronous motor, 3 denotes a rotating shaft at the center of the motor, 4 denotes a bearing, 5 denotes a front end cover, 6 denotes a casing, 7 denotes a stator assembly, 8 denotes a flux barrier, 9 denotes a rotor assembly, 10 denotes a rear end cover, 11 denotes a sun gear, 12 denotes a cage, 13 denotes an outer ring gear, 14 denotes a planetary mechanism, 15 denotes a planet carrier, and 16 denotes a planet gear.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 to 4, the high power density, low speed, and large torque permanent magnet synchronous motor according to the present embodiment includes: the planetary reducer 1 is directly connected with the low-speed large-torque permanent magnet synchronous motor 2 through a spline, an inner ring of the bearing 4 is connected with the front end of the rotating shaft 3 at the center of the motor, an outer ring of the bearing 4 is connected with the front end cover 5, the rear end of the rotating shaft 3 at the center of the motor is connected with the rear end cover 10 through the bearing, and a sealing element is arranged in the bearing 4; a casing 6 is fixed between the outer end of the front end cover 5 and the outer end of the rear end cover 10, the stator assembly 7 is fixed in the casing 6, the rotor assembly 9 is fixed on the magnetism isolating sleeve 8 through bolts, and the magnetism isolating sleeve 8 and the rotating shaft 3 in the center of the motor are matched together to form the core part of the low-speed high-torque permanent magnet synchronous motor. The left end of the rotating shaft adopts a spline and is matched with an inner gear ring of a sun gear 11 of the planetary reducer 1 shown in the figure 4 to be used as a power output end of the whole system. The planetary reducer 1 is mutually matched with a spigot of the shell 6 of the low-speed large-torque permanent magnet synchronous motor and a spline of the rotating shaft 3 at the center of the motor through a flange of the retainer 12 and the inner gear ring of the sun gear 11 to form a whole transmission system.
The casing 6 adopts a Z-shaped water path, the whole casing 6 is of a welded structure, and the whole motor is in a closed state due to the fact that the protection level of the whole transmission system is high, and heat generated by the whole motor system is uniformly taken away by cooling water in the Z-shaped water path and is emitted to the outside.
The working principle of the high-power-density low-speed large-torque permanent magnet synchronous motor is as follows:
the low-speed large-torque permanent magnet synchronous motor provides enough basic power and torque for the whole transmission system, a spline at the shaft extension end of the low-speed large-torque permanent magnet synchronous motor is directly connected and matched with an inner gear ring of a sun gear of a planetary reducer, the planetary reducer is used as a torque amplifier and is used as a power output end of the whole transmission system, and torque output generated by the low-speed large-torque permanent magnet synchronous motor is further amplified, so that the requirement of actual use working conditions is met.
The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. A high power density low speed large torque permanent magnet synchronous motor, comprising: the motor comprises a planetary reducer (1), a high-torque permanent magnet synchronous motor (2), a rotating shaft (3) at the center of the motor, a bearing (4), a front end cover (5), a shell (6), a stator assembly (7), a magnetic isolation sleeve (8), a rotor assembly (9), a rear end cover (10), a sun gear (11), a retainer (12), an outer gear ring (13), a planetary mechanism (14), a planet carrier (15) and a planet gear (16), wherein the planetary reducer (1) is directly connected with the low-speed high-torque permanent magnet synchronous motor (2) through a spline, an inner ring of the bearing (4) is connected with the front end of the rotating shaft (3) at the center of the motor, an outer ring of the bearing (4) is connected with the front end cover (5), the rear end of the rotating shaft (3) at the center of the motor is connected with the rear; a machine shell (6) is fixed between the outer end of the front end cover (5) and the outer end of the rear end cover (10), a stator assembly (7) is fixed in the machine shell (6), a rotor assembly (9) is fixed on a magnetism isolating sleeve (8) through bolts, the magnetism isolating sleeve (8) is matched with a rotating shaft (3) at the center of the motor, an inner gear ring is arranged in a sun gear (11) and is in spline fit connection with the rotating shaft (3) at the center of the motor, an outer gear ring (13) is meshed with a planet gear (16), the planet gear (16), a planet carrier (15) and a bearing (4) form a planet mechanism (14) and is positioned through tooth fit with the outer gear ring (13), the outer gear ring (13) is fixed on a retainer (12) through bolt connection, a planet reducer (1) is matched with a spigot of the machine shell (6) of the low-speed high-torque permanent magnet synchronous motor and a spline of the rotating shaft (3) at the center of the motor, and the whole transmission system is formed.
2. The high power density, low speed and large torque permanent magnet synchronous motor according to claim 1, wherein the casing (6) adopts a zigzag waterway, and the whole casing (6) is of a welded structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922400529.3U CN211089349U (en) | 2019-12-27 | 2019-12-27 | High-power-density low-speed large-torque permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922400529.3U CN211089349U (en) | 2019-12-27 | 2019-12-27 | High-power-density low-speed large-torque permanent magnet synchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN211089349U true CN211089349U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922400529.3U Active CN211089349U (en) | 2019-12-27 | 2019-12-27 | High-power-density low-speed large-torque permanent magnet synchronous motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865412A (en) * | 2021-04-13 | 2021-05-28 | 江苏嘉瑞丰机电设备有限公司 | Permanent magnet slotless motor |
-
2019
- 2019-12-27 CN CN201922400529.3U patent/CN211089349U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112865412A (en) * | 2021-04-13 | 2021-05-28 | 江苏嘉瑞丰机电设备有限公司 | Permanent magnet slotless motor |
| CN112865412B (en) * | 2021-04-13 | 2023-08-04 | 江苏嘉瑞丰机电设备有限公司 | Permanent magnet slotless motor |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230717 Address after: No.1399, Chuangyi Road, Songbei District, Harbin, Heilongjiang Province, 150000 Patentee after: Harbin Electric Group Advanced Motor Technology Co.,Ltd. Address before: 154000 380 Guangfu East Road, Qianjin District, Jiamusi City, Heilongjiang Province Patentee before: JIAMUSI ELECTRIC MACHINE Co.,Ltd. |