CN114362466A - Rotor structure of asynchronous starting permanent magnet synchronous motor - Google Patents
Rotor structure of asynchronous starting permanent magnet synchronous motor Download PDFInfo
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- CN114362466A CN114362466A CN202111471689.2A CN202111471689A CN114362466A CN 114362466 A CN114362466 A CN 114362466A CN 202111471689 A CN202111471689 A CN 202111471689A CN 114362466 A CN114362466 A CN 114362466A
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- permanent magnet
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention discloses a rotor structure of an asynchronous starting permanent magnet synchronous motor, which comprises an iron core formed by rotor punching sheets (2), wherein pull rod round holes (9) and heat dissipation vent holes (10) are reserved on the rotor punching sheets (2), pull rods (11) are installed in the pull rod round holes (9), guide bar grooves (12) are uniformly distributed on the periphery of the rotor punching sheets (2), guide bars (3) are inserted in the guide bar grooves (12), a first permanent magnet (4) and a second permanent magnet (5) are installed on the rotor punching sheets (2), the first permanent magnets (4) are distributed along the circumference, and the second permanent magnets (5) are arranged at 90 degrees with each other; the rotor punching sheet (2) is arranged on the rotating shaft (1) in a key fit manner; end rings (6) are welded on two sides of the guide bar (3). The structural scheme provides a new choice for designing the conducting bar type asynchronous starting permanent magnet synchronous motor, and is convenient for field assembly. The invention has reasonable design and good practical application value.
Description
Technical Field
The invention relates to the technical field of asynchronous starting permanent magnet synchronous motors, in particular to a rotor structure of an asynchronous starting permanent magnet synchronous motor.
Background
The asynchronous starting permanent magnet synchronous motor is also called a self-starting permanent magnet synchronous motor, a rotor of the asynchronous starting permanent magnet synchronous motor is simultaneously provided with a conducting bar and a permanent magnet, and the asynchronous starting permanent magnet synchronous motor can be directly connected to a power frequency of a power grid for starting without being provided with a frequency converter for running. The motor has high power factor and electromechanical conversion efficiency under different load factors, and is applied to oil fields, textile and chemical fiber machinery industries. However, the rotor structure of the asynchronous starting permanent magnet synchronous motor is more complex, and the process feasibility of the permanent magnet and the conducting bar needs to be considered, so that the application is less.
Disclosure of Invention
The invention aims to design a rotor core structure of a conducting bar inserted type asynchronous starting permanent magnet synchronous motor and a corresponding assembly scheme thereof.
The invention is realized by adopting the following technical scheme:
a rotor structure of an asynchronous starting permanent magnet synchronous motor comprises an iron core formed by rotor punching sheets, pull rod round holes and radiating ventilation holes are reserved on the rotor punching sheets, pull rods are installed in the pull rod round holes, guide bar grooves are uniformly distributed on the peripheries of the rotor punching sheets, guide bars are inserted in the guide bar grooves, a No. I permanent magnet and a No. II permanent magnet are installed on the rotor punching sheets, the No. I permanent magnets are distributed along the circumference, and the No. II permanent magnets are arranged at 90 degrees with each other; the rotor punching sheet is arranged on the rotating shaft in a matched mode through keys; end plates are welded on two sides of the guide bar. Both sides of the rotor punching sheet are respectively provided with a permanent magnet baffle and a rotor pressing ring; the four permanent magnet baffles are arranged at 90 degrees and are respectively used for compressing and protecting No. II permanent magnets, the inner side surface of the rotor pressing ring is provided with a pressing groove for placing the permanent magnet baffles, the rotor pressing ring is used for compressing and protecting No. I permanent magnets, and the permanent magnet baffles are embedded into the pressing groove of the rotor pressing ring; and the rotor pressing ring is arranged on the rotating shaft in a matched manner through a key.
Further preferably, corresponding heat dissipation vent holes are reserved on the rotor punching sheet, the permanent magnet baffle and the pressing groove of the rotor pressing ring.
Further preferred, the rotor clamping ring that is located one side blocks the shaft shoulder portion with the pivot, and the rotor clamping ring that is located the opposite side realizes locking through revolving the round nut soon in the pivot, realizes that the rotor clamping ring of both sides compresses tightly No. I permanent magnet.
Preferably, each pressure groove of the rotor pressure ring is provided with a compression hole, and a screw is screwed into the compression hole to compress the permanent magnet baffle embedded into the pressure groove, so that the permanent magnet baffle compresses the No. II permanent magnet.
When the rotor punching sheet is specifically implemented, the rotor punching sheet is of a W-shaped mixed type, the structure fully utilizes the space of the rotor, and more permanent magnets can be placed. The punching sheet is simultaneously provided with a round hole for installing the pull rod and a radiating vent hole. The permanent magnet baffle is installed with the rotor clamping ring in a matching way to compress and protect the permanent magnet. The permanent magnet baffle mainly protects No. II permanent magnet, and the rotor clamping ring mainly protects No. I permanent magnet. In order to prevent the rotor teeth from expanding, tie rods are installed in tie rod round holes of the rotor core.
During specific assembly, because the permanent magnet is easy to generate demagnetization under a high-temperature condition, the scheme needs to perform induction welding on the end rings at the two ends of the conducting bar, and the permanent magnet is installed after tensioning. Before the conducting bars are welded, a rotor pressing ring and a permanent magnet baffle plate on one side of an iron core are installed. The assembly scheme has certain requirements on the thickness design of the No. II permanent magnet. In order to mount the permanent magnet II of the punching sheet in FIG. 1, the axial mounting thickness of the permanent magnet II is required to be smaller than the distance from the end plate to the end ring, i.e. the dimension A in FIG. 4. After the No. I and No. II permanent magnets are installed, the permanent magnet baffle and the rotor pressing ring on the other side are installed, and finally, the rotor is pressed tightly by the round nut.
The invention has reasonable design and good practical application value.
Drawings
Fig. 1 shows a schematic view of a rotor sheet structure.
Fig. 2 shows a schematic view of a rotor clamping ring structure.
Fig. 3 shows a schematic view of a permanent magnet baffle structure.
Fig. 4 shows an assembly diagram of the permanent magnet baffle, the rotor pressing ring and the rotor punching sheet.
Fig. 5 shows a schematic diagram of a rotor structure with a permanent magnet baffle and a rotor clamping ring arranged on one side.
Fig. 6 shows a schematic structural diagram of the rotor of the asynchronous starting permanent magnet synchronous motor.
In the figure: 1-rotating shaft, 2-rotor punching sheet, 3-guide bar, 4-permanent magnet I, 5-permanent magnet II, 6-end ring, 7-permanent magnet baffle, 8-rotor clamping ring, 9-pull rod circular hole, 10-heat dissipation ventilation hole, 11-pull rod, 12-guide bar groove, 13-clamping groove, 14-end plate, 15-round nut, 16-flange and 17-pressing hole.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
A rotor structure of an asynchronous starting permanent magnet synchronous motor comprises an iron core formed by rotor punching sheets 2, wherein end plates 14 are arranged on two sides of the iron core (the thicker rotor punching sheet on the outermost side is generally called as an end plate in the field), as shown in figure 1, pull rod round holes 9 and heat dissipation ventilation holes 10 are reserved on the rotor punching sheets 2, guide bar grooves 12 are uniformly distributed on the peripheries of the rotor punching sheets 2, a first permanent magnet 4 and a second permanent magnet 5 are installed on the rotor punching sheets 2, the first permanent magnet 4 is distributed along the circumference, and four groups of the second permanent magnets 5 are arranged at 90 degrees (up, down, left and right).
As shown in fig. 2, the inner side surface of the rotor pressing ring 8 is provided with a pressing groove 13 for placing the permanent magnet baffle 7, and the outer peripheral surface of the rotor pressing ring 8 is provided with four flanges 16 for pressing the No. i permanent magnet 4.
As shown in fig. 4, both sides of the rotor sheet 2 are respectively provided with a permanent magnet baffle 7 (as shown in fig. 3) and a rotor pressing ring 8; the four permanent magnet baffles 7 are arranged at 90 degrees and are respectively used for compressing and protecting the No. II permanent magnet 5. Then, the rotor pressing ring 8 is used for carrying out compression protection on the No. I permanent magnet 4, and the permanent magnet baffle 7 is embedded into the pressing groove 13 of the rotor pressing ring 8. And corresponding heat dissipation vent holes 10 are reserved on the rotor punching sheet 2, the permanent magnet baffle 7 and the pressure groove 13 of the rotor pressure ring 8. Moreover, each pressure groove 13 of the rotor pressure ring 8 is symmetrically provided with two pressing holes 17, and the screw threads in the pressing holes 17 press the permanent magnet baffle 7 embedded in the pressure groove.
As shown in fig. 5 and 6, the rotor sheet 2 is mounted on the rotating shaft 1 through key fitting; the guide bar groove 12 is internally inserted with a guide bar 3, and both sides of the guide bar 3 are welded with end rings 6; the rotor pressing ring 8 is installed on the rotating shaft 1 through key matching. The rotor pressing ring 8 positioned on one side is clamped with a shaft shoulder part of the rotating shaft 1, and the rotor pressing ring 8 positioned on the other side is locked by screwing a round nut 15 on the rotating shaft 1; a pull rod 11 is arranged in the pull rod round hole 9.
In specific implementation, the rotor sheet of the scheme of the invention is of a W-shaped hybrid structure, the specific structure is shown in figure 1, the structure fully utilizes the space of the rotor, and more permanent magnets can be placed. The punching sheet is simultaneously provided with a round hole for installing the pull rod and a radiating vent hole.
The rotor pressing ring structure is shown in figure 2, and the permanent magnet baffle structure is shown in figure 3. The permanent magnet baffle is installed with the rotor clamping ring in a matching way to compress and protect the permanent magnet. The permanent magnet baffle mainly protects No. II permanent magnet, and the rotor clamping ring mainly protects No. I permanent magnet.
In order to prevent the rotor teeth from expanding, tie rods are installed in tie rod round holes of the rotor core.
During specific assembly, because the permanent magnet is easy to generate demagnetization under a high-temperature condition, the scheme needs to perform induction welding on the end rings at the two ends of the conducting bar, and the permanent magnet is installed after tensioning. Before the conducting bars are welded, a rotor pressing ring and a permanent magnet baffle plate at one end of an iron core are installed. The finished rotor structure is as shown in fig. 5, the rotor pressing ring on the left side is installed on the rotating shaft in a matched mode through keys, the rotor pressing ring on the left side is clamped with a shaft shoulder of the rotating shaft, and the four permanent magnet baffles are located in the pressing groove of the rotor pressing ring. The assembly scheme has certain requirements on the thickness design of the No. II permanent magnet. In order to mount the permanent magnet II of the punching sheet in FIG. 1, the axial mounting thickness of the permanent magnet II is required to be smaller than the distance from the end plate to the end ring, i.e. the dimension A in FIG. 4, so that the permanent magnet II can be smoothly mounted in the iron core. After the No. I and No. II permanent magnets are installed, the permanent magnet baffle plate and the rotor pressing ring on the right side are installed, and finally, the rotor is pressed tightly through a round nut, as shown in figure 6. And then screwing a screw into each pressing groove of the rotor pressing ring to tightly press the corresponding permanent magnet baffle.
The designed 1200KW mining asynchronous starting permanent magnet synchronous motor adopts the rotor core structure and the assembly scheme, well completes on-site assembly and passes a motor test.
The structure and the corresponding assembly scheme provide a new choice for designing the conducting bar type asynchronous starting permanent magnet synchronous motor, and the field assembly is convenient.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the detailed description is made with reference to the embodiments of the present invention, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall be covered by the claims of the present invention.
Claims (8)
1. A rotor structure of an asynchronous starting permanent magnet synchronous motor comprises an iron core formed by rotor punching sheets (2), pull rod round holes (9) and heat dissipation ventilation holes (10) are reserved on the rotor punching sheets (2), pull rods (11) are installed in the pull rod round holes (9), guide strip grooves (12) are evenly distributed on the peripheries of the rotor punching sheets (2), guide strips (3) are inserted in the guide strip grooves (12), a first permanent magnet (4) and a second permanent magnet (5) are installed on the rotor punching sheets (2), the first permanent magnet (4) is distributed along the circumference, and the second permanent magnets (5) are mutually arranged at 90 degrees; the rotor punching sheet (2) is arranged on the rotating shaft (1) in a key fit manner; end rings (6) are welded on two sides of the guide bar (3);
the method is characterized in that: permanent magnet baffles (7) and rotor pressing rings (8) are respectively arranged outside end plates (14) on two sides of the rotor punching sheet (2); the four permanent magnet baffles (7) are arranged at 90 degrees and are respectively used for compressing and protecting the No. II permanent magnet (5), a pressing groove (13) for placing the permanent magnet baffles (7) is formed in the inner side surface of the rotor pressing ring (8), the rotor pressing ring (8) is used for compressing and protecting the No. I permanent magnet (4), and the permanent magnet baffles (7) are embedded into the pressing groove (13) of the rotor pressing ring (8); and the rotor pressing ring (8) is arranged on the rotating shaft (1) in a key fit manner.
2. An asynchronously started permanent magnet synchronous motor rotor structure according to claim 1, characterized in that: and corresponding heat dissipation vent holes (10) are reserved on the rotor punching sheet (2), the permanent magnet baffle (7) and the pressure groove (13) of the rotor pressure ring (8).
3. An asynchronously started permanent magnet synchronous motor rotor structure according to claim 1 or 2, characterized in that: the rotor pressing ring (8) positioned on one side is clamped on the shaft shoulder part of the rotating shaft (1), and the rotor pressing ring (8) positioned on the other side is locked by screwing a round nut (15) on the rotating shaft (1).
4. An asynchronously started permanent magnet synchronous motor rotor structure according to claim 3, characterized in that: and four flanges (16) used for compressing the No. I permanent magnet (4) are arranged on the peripheral surface of the rotor pressing ring (8).
5. An asynchronously started permanent magnet synchronous motor rotor structure according to claim 2, characterized in that: each pressure groove (13) of the rotor pressure ring (8) is provided with a compression hole (17), and the internal threads of the compression holes (17) are screwed into screws to compress the permanent magnet baffle (7) embedded into the pressure grooves.
6. An asynchronously started permanent magnet synchronous motor rotor structure according to claim 5, characterized in that: each pressure groove (13) of the rotor pressure ring (8) is symmetrically provided with two pressure holes (17).
7. An asynchronously started permanent magnet synchronous motor rotor structure according to claim 1, characterized in that: the two sides of the iron core are end plates (14).
8. An asynchronously started permanent magnet synchronous motor rotor structure according to claim 7, characterized in that: the axial thickness of the No. II permanent magnet (5) is smaller than the distance between the end plate (14) and the end ring (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111471689.2A CN114362466B (en) | 2021-12-06 | 2021-12-06 | Rotor structure of asynchronous starting permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111471689.2A CN114362466B (en) | 2021-12-06 | 2021-12-06 | Rotor structure of asynchronous starting permanent magnet synchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114362466A true CN114362466A (en) | 2022-04-15 |
| CN114362466B CN114362466B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111471689.2A Active CN114362466B (en) | 2021-12-06 | 2021-12-06 | Rotor structure of asynchronous starting permanent magnet synchronous motor |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142758A (en) * | 2011-03-07 | 2011-08-03 | 浙江大学 | Cage rotor of self-starting permanent magnet synchronous motor |
| CN102170184A (en) * | 2010-11-19 | 2011-08-31 | 王乃兵 | Rotor sheet of asynchronously-started PMSM (permanent magnet synchronous motor) |
| CN208316436U (en) * | 2018-03-26 | 2019-01-01 | 江苏中炬电机有限公司 | A kind of Rare-earth PMSM Rotor Structure |
| CN208423965U (en) * | 2018-06-27 | 2019-01-22 | 武汉万实新能源科技股份有限公司 | rotor and motor |
| CN208797700U (en) * | 2018-09-18 | 2019-04-26 | 浙江东音泵业股份有限公司 | A kind of asynchronous starting synchronous operation well pump motor |
| CN111697781A (en) * | 2019-03-13 | 2020-09-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet motor and compressor and air conditioner with same |
-
2021
- 2021-12-06 CN CN202111471689.2A patent/CN114362466B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170184A (en) * | 2010-11-19 | 2011-08-31 | 王乃兵 | Rotor sheet of asynchronously-started PMSM (permanent magnet synchronous motor) |
| CN102142758A (en) * | 2011-03-07 | 2011-08-03 | 浙江大学 | Cage rotor of self-starting permanent magnet synchronous motor |
| CN208316436U (en) * | 2018-03-26 | 2019-01-01 | 江苏中炬电机有限公司 | A kind of Rare-earth PMSM Rotor Structure |
| CN208423965U (en) * | 2018-06-27 | 2019-01-22 | 武汉万实新能源科技股份有限公司 | rotor and motor |
| CN208797700U (en) * | 2018-09-18 | 2019-04-26 | 浙江东音泵业股份有限公司 | A kind of asynchronous starting synchronous operation well pump motor |
| CN111697781A (en) * | 2019-03-13 | 2020-09-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet motor and compressor and air conditioner with same |
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| CN114362466B (en) | 2023-04-07 |
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