CN114006485A - High-speed permanent magnet generator - Google Patents
High-speed permanent magnet generator Download PDFInfo
- Publication number
- CN114006485A CN114006485A CN202111426896.6A CN202111426896A CN114006485A CN 114006485 A CN114006485 A CN 114006485A CN 202111426896 A CN202111426896 A CN 202111426896A CN 114006485 A CN114006485 A CN 114006485A
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- China
- Prior art keywords
- rotor
- permanent magnet
- stator
- magnet steel
- bearing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
- H02K11/012—Shields associated with rotating parts, e.g. rotor cores or rotary shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/02—Casings or enclosures characterised by the material thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A high-speed permanent magnet generator comprises a stator base and a stator core with windings, wherein the stator base is connected with a bearing through an end cover, a rotor is arranged on the bearing, a shaft extension end of the rotor is locked by the bearing, a spring piece is arranged in a bearing chamber at the tail part of a non-shaft extension end of the rotor, and the spring piece is axially pushed against the rotor. The rotor core and the pivot of motor rotor high magnetic conduction are split type design, rotor core and pivot mutually noninterfere, and the outer circle suit is non-magnetic conductive non-magnetic alloy sleeve sheath of magnetic conduction behind arc magnet steel and the rotor core assembly, and arc magnet steel is between and arc magnet steel both ends jar epoxy is in order to protect and fixed arc magnet steel, and arc magnet steel both ends set up the apron of magnetic conduction not, can prevent tip magnetic leakage.
Description
Technical Field
The invention belongs to the technical field of permanent magnet motors, and particularly relates to a high-speed permanent magnet generator.
Background
In a distributed power generation system, a high-speed generator driven by a gas turbine is small in size and high in maneuverability, can be used as a standby power supply for hospitals, hotels and other important facilities, can also be used as an independent power supply or a small power station, makes up the defect of centralized power supply, and has important practical value.
The high-speed permanent magnet motor has the advantages that the current frequency of a stator winding is higher and can reach more than 1000Hz when the high-speed permanent magnet motor operates, the rotating speed of a rotor of the high-speed permanent magnet motor reaches tens of thousands of revolutions per minute, the iron loss is increased rapidly compared with that of a common motor, and due to the small size and poor heat dissipation condition of the high-speed motor, a water-cooled base is adopted for a stator, or the stator is oil-cooled, and the cooling system is complex in structure.
The high-speed permanent magnet motor rotor mostly adopts a laminated structure, magnetic steel is embedded in the high-speed permanent magnet motor rotor, and the safety coefficient of the rotor lamination is greatly reduced after the rotating speed of the rotor is increased.
Through the above analysis, the problems and defects of the prior art are as follows: the stator cooling structure is complicated, and the rotor adopts silicon steel sheet to be unfavorable for improving motor speed.
The Chinese invention patent 'surface-mounted permanent magnet fixing structure of a high-power high-speed permanent magnet generator rotor' (publication number: CN202997865U) discloses a surface-mounted permanent magnet fixing structure of a high-power high-speed permanent magnet generator rotor, wherein a plurality of bosses (5) for positioning permanent magnets (3) are uniformly distributed on the surface of each permanent magnet area along the axial direction, a plurality of spliced permanent magnets (3) are fixedly bonded on the surface of each permanent magnet area through high-strength adhesive, the two circumferentially adjacent permanent magnets (3) are separated and positioned through the bosses (5), each permanent magnet (3) is fastened with a rotor iron core (2) through fastening bolts (7), carbon fiber binding bands (8) coated with resin are wound on the outer surfaces of the permanent magnets (3), and rotor baffles (6) are fixedly mounted at the two axial ends of each permanent magnet (3); the surface-mounted fixed permanent magnet structure of the high-power high-speed permanent magnet generator rotor mainly introduces a surface-mounted fixed permanent magnet structure, so that the permanent magnet is firmly fixed by overcoming the centrifugal force.
The chinese utility model patent "motor rotor and high-speed permanent magnet generator" (publication number: CN202949297U) discloses a motor rotor and high-speed permanent magnet generator, the motor rotor includes: the permanent magnet motor comprises a motor rotating shaft, a rotor yoke, a permanent magnet, a rotor pole shoe and a rotor pole shoe fixing block; the motor rotating shaft is fixedly connected with the rotor yoke part through a plurality of connecting rib plates; the rotor pole shoe and the rotor pole shoe fixing blocks are arranged on the periphery of the rotor yoke, the rotor pole shoe is fixedly connected with the adjacent pole shoe fixing blocks, and the rotor pole shoe fixing blocks are fixedly connected with the rotor yoke; permanent magnet slots for placing permanent magnets are formed among the rotor yoke, the rotor pole shoes and the pole shoe fixing blocks; the permanent magnet is accommodated in the permanent magnet slot. However, the utility model is characterized in that the permanent magnet is placed in the permanent magnet groove formed by the rotor yoke part, the rotor pole shoe and the rotor pole shoe fixing block, and the rotor permanent magnet is firmly fixed, so the magnetic leakage coefficient is small and the utilization rate is high; and the rotor pole shoe fixing block is firmly fixed on the rotor yoke part to bear the centrifugal force and the circumferential force of the permanent magnet and the rotor pole shoe, and the improvement on the overall structure of the permanent magnet motor is not great.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-speed permanent magnet generator which is simple in structure, convenient to install and high in reliability.
In order to solve the technical problems, the invention adopts the technical scheme that:
a high-speed permanent magnet generator comprises a stator base and a stator core with windings, wherein the stator base is connected with a bearing through an end cover, a rotor is arranged on the bearing, a shaft extension end of the rotor is locked by the bearing, a spring piece is arranged in a bearing chamber at the tail part of a non-shaft extension end of the rotor, and the spring piece is used for axially jacking the rotor;
a plurality of axially distributed heat dissipation grooves are formed in the outer wall of the stator base along the circumferential direction;
the stator core is arranged in a chute, the stator core and the stator base are in interference fit, and a positioning pin is arranged between the stator core and the stator base;
the rotor core and the pivot of rotor adopt split type design, and the interior circle of rotor core opens and to have the locating hole that is used for the suit in the pivot, and its excircle is equipped with a plurality of magnet steel standing grooves that are used for placing the arc magnet steel along circumference, and the radial outside of arc magnet steel still the interference fit is equipped with non-magnetic alloy sleeve, and the axial both ends of arc magnet steel all are equipped with the apron of non-magnetic conduction, and between the arc magnet steel and between apron and the arc magnet steel terminal surface still all the embedment have epoxy.
The stator frame adopts an aluminum cylinder structure.
The shaft extension end of the rotor is provided with a flange used for limiting the permanent magnet, and the cover plate positioned at the non-shaft extension end of the rotor compresses the permanent magnet through threads.
And the non-shaft-extending end of the rotor is in threaded connection with a rotor pressing plate.
And the stator punching sheet of the stator core adopts a 35W270 punching sheet.
The invention has the beneficial effects that:
(1) according to the high-speed permanent magnet generator, the stator base of the motor is of an aluminum cylindrical structure, a plurality of axially distributed heat dissipation grooves are machined in the outer circle of the motor, the structure is simple, and the heat dissipation effect is good; the stator core punching sheet with the winding adopts a 35W270 punching sheet, the high-frequency loss is small, and the stator core adopts a skewed slot arrangement, so that the harmonic loss can be reduced; and a plurality of positioning pins are adopted between the stator core and the stator base to fix and prevent the displacement of the core and the stator base during operation.
(2) The rotor core and the pivot of motor rotor high magnetic conduction are split type design, rotor core and pivot mutually noninterfere, and the outer circle suit is non-magnetic conductive non-magnetic alloy sleeve sheath of magnetic conduction behind arc magnet steel and the rotor core assembly, and arc magnet steel is between and arc magnet steel both ends jar epoxy is in order to protect and fixed arc magnet steel, and arc magnet steel both ends set up the apron of magnetic conduction not, can prevent tip magnetic leakage.
(3) One end of the rotor is provided with a flange to limit the permanent magnet, the cover plate at the other end compresses the permanent magnet through threads, and the flange and the cover plate can be used as a high-speed balance weight-removing area of the rotor.
(4) The non-shaft-extension end of the rotor is provided with a spring piece which can be used for providing axial jacking force and providing heat expansion.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the rotor;
FIG. 3 is a partial cross-sectional view of the rotor;
FIG. 4 is a schematic view of the stator frame construction;
FIG. 5 is a schematic structural view of a stator lamination;
FIG. 6 is an assembly view of the arc-shaped magnetic steel and the rotor core;
fig. 7 is a structural schematic view of the spring plate.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The present invention provides a high speed permanent magnet generator as shown in figures 1 to 7.
The high-speed permanent magnet generator comprises a stator frame 4 and a stator core 5 with windings, wherein the stator frame 4 is connected with a bearing 3 through an end cover 2, a rotor 1 is arranged on the bearing 3, a shaft extension end of the rotor 1 is locked by the bearing, a spring piece 9 is arranged in a bearing chamber 8 at the tail part of a non-shaft extension end of the rotor, the spring piece 9 is used for axially jacking the rotor 1, and the spring piece 9 is used for providing axial jacking force and can provide heat expansion amount.
And a plurality of heat dissipation grooves 41 which are axially distributed are formed in the outer wall of the stator base 4 along the circumferential direction, so that the heat dissipation performance of the motor is improved.
The rotor core 1-3 and the rotating shaft of the rotor 1 are designed in a split mode, the inner circle of the rotor core 1-3 is provided with positioning holes for being sleeved on the rotating shaft, the outer circle of the rotor core is provided with a plurality of magnetic steel placing grooves for placing the arc-shaped magnetic steels 1-4 at intervals along the circumferential direction, the radial outer sides of the arc-shaped magnetic steels 1-4 are further sleeved with non-magnetic-conductive alloy sleeves in an interference fit mode, the two axial ends of the arc-shaped magnetic steels 1-4 are respectively provided with a non-magnetic-conductive cover plate 1-2, and epoxy resins 1-7 are filled between the arc-shaped magnetic steels 1-4 and between the cover plates 1-2 and the end faces of the arc-shaped magnetic steels 1-4.
The arc magnet steel 1-4 of the motor rotor is of a surface-mounted structure, the rotor core 1-3 and the rotating shaft with high magnetic conductivity are of a split type design, the rotor core 1-3 and the rotating shaft are not interfered with each other, the excircle of the arc magnet steel 1-4 and the rotor core 1-3 after assembly is sleeved with the non-magnetic-conductive alloy sleeve 1-5 which is not magnetic-conductive, the arc magnet steel 1-4 and the arc magnet steel 1-4 are respectively provided with epoxy resin to protect and fix the arc magnet steel 1-4, and the two ends of the arc magnet steel 1-4 are provided with the non-magnetic-conductive cover plates 1-2 to prevent the magnetic leakage of the end parts.
In the embodiment, the stator base 4 adopts an aluminum cylindrical structure, the structure is simple, the heat dissipation effect is good, the shaft extension end of the rotor 1 is provided with a flange 1-1 for limiting the permanent magnet, the permanent magnet is pressed by a cover plate 1-2 positioned at the non-shaft extension end of the rotor through threads, and the flange 1-1 and the cover plate 1-2 can be used as high-speed balance weight-removing areas of the rotor; and the non-shaft extension end of the rotor is also provided with rotor pressing plates 1-6 of a permanent magnet machine through threads.
More specifically, the high-speed permanent magnet generator of the invention is composed of a barrel type motor stator base 4, an end cover 2 arranged on the motor stator base 4, a bearing 3 and a rotor 1 supported by the bearing. The shaft-extending end bearing is locked, and a spring leaf 9 is arranged in a bearing chamber 8 at the tail part of the non-shaft-extending end bearing 3 and used for pushing the rotor 1 axially. The stator core 5 with the winding and the stator base 4 of the aluminum cylinder are in interference fit, and in order to avoid separation of the stator core 5 with the winding and the stator base 4 of the aluminum cylinder, a positioning pin 6 is arranged between the stator core 5 with the winding and the stator base 4 of the aluminum cylinder.
The left side of a rotor 1 body is provided with a flange for limiting the axial direction of a rotor of a permanent magnet machine, a rotor core 1-3 inner circle of the permanent magnet machine is provided with an opening for sleeving a rotor shaft, the outer circle is provided with a plurality of arc-shaped magnetic steel placing grooves, arc-shaped magnetic steels 1-4 are placed in the grooves, the outer circles of the arc-shaped magnetic steels 1-4 are sleeved with non-magnetic-conductive alloy sleeves 1-5 in an interference mode, non-magnetic-conductive stainless steel cover plates 1-2 are arranged at the two ends of the arc-shaped magnetic steels 1-4, epoxy resin 1-7 is filled and sealed between the arc-shaped magnetic steels 1-4 and between the cover plates 1-2 and the end faces of the arc-shaped magnetic steels, and the non-axial-extending end of the rotor 1 is provided with threads for installing rotor pressing plates 1-6 of the permanent magnet machine.
Where the words "first", "second", etc. are used in this patent to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the invention and to simplify the description, and the words are not intended to have a special meaning.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in 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, are not to be construed as limiting the scope of the present invention.
Claims (5)
1. The utility model provides a high-speed permanent magnet generator, includes stator frame and the stator core who has the winding, and the stator frame passes through the end cover and is connected with the bearing, and the rotor is arranged in on the bearing, its characterized in that: the shaft extension end of the rotor is locked by a bearing, and a spring piece is arranged in a bearing chamber at the tail part of the non-shaft extension end of the rotor and is used for axially jacking the rotor;
a plurality of axially distributed heat dissipation grooves are formed in the outer wall of the stator base along the circumferential direction;
the stator core is arranged in a chute, the stator core and the stator base are in interference fit, and a positioning pin is arranged between the stator core and the stator base;
the rotor core and the pivot of rotor adopt split type design, and the interior circle of rotor core opens and to have the locating hole that is used for the suit in the pivot, and its excircle is equipped with a plurality of magnet steel standing grooves that are used for placing the arc magnet steel along circumference, and the radial outside of arc magnet steel still the interference fit is equipped with non-magnetic alloy sleeve, and the axial both ends of arc magnet steel all are equipped with the apron of non-magnetic conduction, and between the arc magnet steel and between apron and the arc magnet steel terminal surface still all the embedment have epoxy.
2. A high speed permanent magnet generator according to claim 1, wherein: the stator frame adopts an aluminum cylinder structure.
3. A high speed permanent magnet generator according to claim 1, wherein: the shaft extension end of the rotor is provided with a flange used for limiting the permanent magnet, and the cover plate positioned at the non-shaft extension end of the rotor compresses the permanent magnet through threads.
4. A high speed permanent magnet generator according to any of claims 1 to 3, wherein: and the non-shaft-extending end of the rotor is in threaded connection with a rotor pressing plate.
5. A high speed permanent magnet generator according to claim 4, wherein: and the stator punching sheet of the stator core adopts a 35W270 punching sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111426896.6A CN114006485A (en) | 2021-11-28 | 2021-11-28 | High-speed permanent magnet generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111426896.6A CN114006485A (en) | 2021-11-28 | 2021-11-28 | High-speed permanent magnet generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114006485A true CN114006485A (en) | 2022-02-01 |
Family
ID=79930581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111426896.6A Pending CN114006485A (en) | 2021-11-28 | 2021-11-28 | High-speed permanent magnet generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114006485A (en) |
-
2021
- 2021-11-28 CN CN202111426896.6A patent/CN114006485A/en active Pending
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