CN113285571A - Redundant excitation double-speed winding stator permanent magnet generator - Google Patents
Redundant excitation double-speed winding stator permanent magnet generator Download PDFInfo
- Publication number
- CN113285571A CN113285571A CN202110841368.0A CN202110841368A CN113285571A CN 113285571 A CN113285571 A CN 113285571A CN 202110841368 A CN202110841368 A CN 202110841368A CN 113285571 A CN113285571 A CN 113285571A
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- speed
- permanent magnet
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
- H02K21/44—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
- H02K21/029—Vectorial combination of the fluxes generated by a plurality of field sections or of the voltages induced in a plurality of armature sections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention relates to a redundant excitation double-speed winding stator permanent magnet generator, which comprises a stator and a rotor, wherein the stator comprises a plurality of stator cores arranged around the circumference and permanent magnets connected between adjacent stator cores, each stator core comprises two permanent magnet teeth arranged at two ends of the stator core and axial magnetic conduction teeth connected with the yoke parts of the stator cores, a low-speed armature coil is arranged between the permanent magnet teeth of the two adjacent stator cores, a high-speed armature coil is arranged on the axial magnetic conduction teeth, the rotor comprises a low-speed rotor module and a high-speed rotor module, the rotor teeth of the low-speed rotor module are matched with the permanent magnet teeth, and the rotor teeth of the high-speed rotor module are matched with the axial magnetic conduction teeth. The reliable operation of the wind driven generator is realized.
Description
Technical Field
The invention relates to the technical field of motor manufacturing, in particular to a redundant excitation double-speed winding stator permanent magnet generator.
Background
With the continuous development of wind power generation systems, higher requirements are also put forward on technical indexes of a wind power generator body and a control system thereof, and the requirements comprise that: high power level, stable operation, high reliability, strong fault-tolerant capability, and can still generate certain electric power in a fault state for a short time. The traditional flux switching motor has the advantage of high power density, the stator and the rotor are both in a salient pole structure, the rotor is only composed of silicon steel sheets, and the flux switching motor is simple in structure, high in mechanical strength and suitable for operating in a working scene with rich wind energy but severe environmental conditions. However, the conventional magnetic flux switching permanent magnet generator mostly adopts a three-phase winding structure, only a single working condition is considered in the design process, and the conventional magnetic flux switching permanent magnet generator is not suitable for the operation working condition with changeable wind power. In addition, the wind driven generator has severe operating conditions and complex environment, when a certain phase winding or a power converter has a fault, the remaining normal phase is difficult or incapable of maintaining the normal operation of the generator, and the reliability of the whole wind power generation system is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a redundant excitation double-speed winding stator permanent magnet generator, which effectively improves the flexibility of power distribution of the generator under the operation of different wind speed working conditions and simultaneously improves the reliability of the operation of the generator.
The invention is realized by the following technical scheme:
a redundant excitation double-speed winding stator permanent magnet generator comprises a stator and a rotor, wherein an air gap is arranged between the stator and the rotor, it is characterized in that the stator comprises a plurality of stator cores arranged around the circumference and permanent magnets connected between the adjacent stator cores, the stator core comprises two permanent magnetic teeth arranged at two ends of the stator core and an axial magnetic tooth connected with a yoke part of the stator core, the axial magnetic guide teeth are positioned at the central positions of the two permanent magnet teeth, a low-speed armature coil is arranged between the permanent magnet teeth of the two adjacent stator cores, the axial magnetic guide teeth are provided with high-speed armature coils, the rotor comprises a low-speed rotor module arranged opposite to the permanent magnetic teeth and a high-speed rotor module arranged opposite to the axial magnetic guide teeth, and the rotor teeth of the low-speed rotor module are matched with the permanent magnet teeth, and the rotor teeth of the high-speed rotor module are matched with the axial magnetic conduction teeth.
According to the above technical solution, preferably, the number of teeth of the low speed rotor module is 2 times that of the high speed rotor module, and the rotor teeth of the high speed rotor module are located at a center line position between two adjacent rotor teeth of the low speed rotor module.
According to the above technical solution, preferably, permanent magnets are embedded between adjacent stator cores, the magnetizing directions of the permanent magnets are tangential, and the magnetizing directions of the adjacent permanent magnets are opposite.
According to the above technical solution, preferably, the axial magnetic guide teeth have a T-shaped structure.
According to the above technical solution, preferably, the rotor is disposed inside the stator core to form an inner rotor structure, or disposed outside the stator core to form an outer rotor structure.
According to the above technical solution, preferably, the tooth profiles of the low-speed rotor module and the high-speed rotor module are in a straight groove or a skewed groove structure.
According to the above technical solution, preferably, the stator core, the permanent magnet teeth, the axial magnetic guide teeth, the low-speed rotor module and the high-speed rotor module are made of silicon steel sheet magnetic conductive material.
According to the technical scheme, preferably, the permanent magnet is made of neodymium iron boron, samarium cobalt and ferrite permanent magnet materials.
The invention has the beneficial effects that:
(1) the redundant excitation double-speed winding stator permanent magnet generator can be used for generating electricity and also can be used for electrically operating, and has the advantages of high power density and low loss.
(2) The wind driven generator adopts a double-speed winding structure, namely comprises a high-speed winding and a low-speed winding, and can adopt three working modes of single low-speed winding operation, single high-speed winding operation and double winding operation according to different wind speed conditions, so that the operation flexibility of the wind driven generator is effectively improved.
(3) The permanent magnet tooth magnetic circuit and the magnetic conduction tooth magnetic circuit are connected in parallel, and the magnetic chains are jointly wound by the low-speed winding chains, so that the power density of the generator is improved in the running process of the motor.
(4) The high-speed winding and the low-speed winding are mutually redundant, when one winding fails, the other winding can work normally, the wind driven generator is maintained to operate stably in a short time, and the reliability and the safety of the operation of the generator are improved.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a partial cross-sectional view of a three-dimensional structure of the present invention.
Fig. 3 is a schematic perspective view of a low-speed rotor module according to the present invention.
Fig. 4 is a perspective view of a high speed rotor module portion of the present invention.
Fig. 5 is a schematic diagram of the magnetic circuit of the low-speed winding and the high-speed winding according to the present invention.
In the figure: 1. a stator core; 2. permanent magnet teeth; 3. an axial magnetic guide tooth; 4. a permanent magnet; 5. a low speed armature coil; 6. a high speed armature coil; 7. a rotor; 8. a low speed rotor module; 9. a high speed rotor module.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope 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", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the invention.
As shown in the figure, the permanent magnet synchronous motor comprises a stator and a rotor 7, an air gap is formed between the stator and the rotor 7, both the stator and the rotor are of a salient pole structure, the stator comprises a plurality of circumferentially arranged stator cores 1 and permanent magnets 4 connected between the adjacent stator cores 1, in the embodiment, the permanent magnets 4 are embedded between the adjacent stator cores 1, the magnetizing directions of the permanent magnets 4 are tangential, the magnetizing directions of the adjacent permanent magnets 4 are opposite, and the permanent magnets 4 are made of neodymium iron boron, samarium cobalt and ferrite permanent magnet materials.
The stator core 1 comprises two permanent magnet teeth 2 arranged at two ends of the stator core 1 and an axial magnetic conduction tooth 3 connected with a yoke part of the stator core 1, the axial magnetic conduction tooth 3 is positioned at the central position of the two permanent magnet teeth 2, in the embodiment, the two permanent magnet teeth 2 form a U-shaped stator core 1 structure, and the T-shaped axial magnetic conduction tooth 3 is positioned at the central position of the U-shaped stator core 1 and is connected with the yoke part of the stator core 1 to form a magnetic circuit. A low-speed armature coil 5 is arranged between the permanent magnet teeth 2 of the two adjacent stator cores 1, and a high-speed armature coil 6 is arranged on the axial magnetic guide tooth 3, wherein the axial magnetic guide tooth 3 is of a T-shaped structure, two ends of the axial magnetic guide tooth 3 are connected with the stator cores 1, and the high-speed armature coil 6 is arranged in the middle of the axial magnetic guide tooth 3.
The rotor 7 is disposed inside the stator core 1 to constitute an inner rotor structure, or disposed outside the stator core 1 to constitute an outer rotor structure. The rotor comprises a low-speed rotor module 8 and a high-speed rotor module 9, wherein the low-speed rotor module 8 is arranged relative to the permanent magnet teeth 2, the high-speed rotor module 9 is arranged relative to the axial magnetic guide teeth 3, the low-speed rotor module 8 and the high-speed rotor module 9 are coaxially arranged, the tooth shapes of the low-speed rotor module 8 and the high-speed rotor module 9 are of a straight groove or chute structure, the rotor teeth of the low-speed rotor module 8 are matched with the permanent magnet teeth 2, the rotor teeth of the high-speed rotor module 9 are matched with the axial magnetic guide teeth 3, and the permanent magnet teeth 2 and the axial magnetic guide teeth 3 of the stator core 1, the low-speed rotor module 8 and the high-speed rotor module 9 jointly form a closed magnetic circuit. In this embodiment, the number of teeth of the low-speed rotor module 8 is 2 times that of the high-speed rotor module 9, the rotor teeth of the high-speed rotor module 9 are located on a centerline between two adjacent rotor teeth of the low-speed rotor module 8, and the stator core 1, the permanent magnet teeth 2, the axial magnetic conductive teeth 3, the low-speed rotor module 8, and the high-speed rotor module 9 are made of silicon steel sheet magnetic conductive materials.
The working principle of the flux switching motor is shown in fig. 5, when the low-speed rotor module 8 is located at a special position shown in fig. 5, the rotor teeth of the low-speed rotor module 8 and the two permanent magnet teeth 2 of the stator are located at opposite positions to jointly form a closed magnetic circuit, and a flux linkage penetrates through a low-speed winding; meanwhile, the rotor teeth of the high-speed rotor module 9 are opposite to the axial magnetic conduction teeth 3 in the middle of the two permanent magnet teeth 2 to jointly form a closed magnetic circuit, and the magnetic flux linkage penetrates through the high-speed winding. With the continuous change of the relative position of the rotor and the stator, the low-speed coil and the high-speed coil link a sinusoidally-changed permanent magnet flux linkage waveform.
The redundant excitation double-speed winding stator permanent magnet generator has the advantages of high power density and low loss; the wind driven generator adopts a double-speed winding structure, namely comprises a high-speed winding and a low-speed winding, and can adopt three working modes of single low-speed winding operation, single high-speed winding operation and double winding operation according to different wind speed conditions, so that the operation flexibility of the wind driven generator is effectively improved; the permanent magnet tooth 2 magnetic circuit and the magnetic conduction tooth magnetic circuit are connected in parallel, and the magnetic flux linkages are jointly linked by the low-speed winding chains, so that the power density of the generator is improved in the running process of the motor; in addition, the high-speed winding and the low-speed winding of the generator are mutually redundant, when one winding fails, the other winding can work normally, the stable operation of the wind driven generator in a short time is maintained, and the reliability and the safety of the operation of the generator are improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A redundant excitation double-speed winding stator permanent magnet generator comprises a stator and a rotor (7), wherein an air gap is formed between the stator and the rotor (7), and the redundant excitation double-speed winding stator permanent magnet generator is characterized in that the stator comprises a plurality of stator iron cores (1) arranged around the stator and permanent magnets (4) connected between adjacent stator iron cores (1), each stator iron core (1) comprises two permanent magnet teeth (2) arranged at two ends of each stator iron core (1) and axial magnetic guide teeth (3) connected with the yoke portion of each stator iron core (1), each axial magnetic guide tooth (3) is located at the center of each permanent magnet tooth (2), a low-speed armature coil (5) is arranged between the permanent magnet teeth (2) of the two adjacent stator iron cores (1), a high-speed armature coil (6) is arranged on each axial magnetic guide tooth (3), and the rotor (7) comprises a low-speed rotor module (8) arranged relative to each axial permanent magnet tooth (2) and a high-speed rotor module (3) arranged relative to each axial permanent magnet tooth (3) 9) The rotor teeth of the low-speed rotor module (8) are matched with the permanent magnet teeth (2), and the rotor teeth of the high-speed rotor module (9) are matched with the axial magnetic guide teeth (3).
2. A redundant excitation two-speed winding stator permanent magnet generator according to claim 1, characterized in that the number of teeth of the low speed rotor module (8) is 2 times the number of teeth of the high speed rotor module (9), the rotor teeth of the high speed rotor module (9) being located at the center line position between two adjacent rotor teeth of the low speed rotor module (8).
3. The redundant excitation double-speed winding stator permanent magnet generator as claimed in claim 2, wherein permanent magnets (4) are embedded between adjacent stator cores (1), the magnetizing directions of the permanent magnets (4) are tangential, and the magnetizing directions of the adjacent permanent magnets (4) are opposite.
4. A redundant excitation two-speed winding stator permanent magnet generator according to claim 1 or 3, characterized in that the axial direction magnetic teeth (3) are T-shaped.
5. A redundant excitation two-speed winding stator permanent magnet generator according to claim 1, characterized in that the rotor (7) is arranged inside the stator core (1) to form an inner rotor structure, or is arranged outside the stator core (1) to form an outer rotor structure.
6. The redundant excitation two-speed winding stator permanent magnet generator according to claim 1 or 5, characterized in that the tooth shapes of the low-speed rotor module (8) and the high-speed rotor module (9) are straight groove or skewed groove structures.
7. The redundant excitation double-speed winding stator permanent magnet generator according to claim 6, wherein the stator core (1), the permanent magnet teeth (2), the axial magnetic conduction teeth (3), the low-speed rotor module (8) and the high-speed rotor module (9) are made of silicon steel sheet magnetic conduction materials.
8. A redundant excitation two-speed winding stator permanent magnet generator according to claim 7, characterized in that, said permanent magnet (4) is neodymium iron boron, samarium cobalt, ferrite permanent magnet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110841368.0A CN113285571B (en) | 2021-07-26 | 2021-07-26 | Redundant excitation double-speed winding stator permanent magnet generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110841368.0A CN113285571B (en) | 2021-07-26 | 2021-07-26 | Redundant excitation double-speed winding stator permanent magnet generator |
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| Publication Number | Publication Date |
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| CN113285571A true CN113285571A (en) | 2021-08-20 |
| CN113285571B CN113285571B (en) | 2021-11-09 |
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| CN202110841368.0A Active CN113285571B (en) | 2021-07-26 | 2021-07-26 | Redundant excitation double-speed winding stator permanent magnet generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498993A (en) * | 2021-12-30 | 2022-05-13 | 西安中车永电捷力风能有限公司 | Compact semi-direct-drive permanent magnet synchronous wind driven generator |
| CN115065178A (en) * | 2022-06-06 | 2022-09-16 | 河北工业大学 | Integrated double-module flux reversal motor of vehicle-mounted charger |
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| CN103051134A (en) * | 2012-12-26 | 2013-04-17 | 南昌大学 | Serial-magnetic-circuit hybrid-excitation permanent magnet motor |
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| CN105515314A (en) * | 2016-02-29 | 2016-04-20 | 东南大学 | Hybrid excitation magnetic linkage parallel double-rotor combined motor |
| CN105515313A (en) * | 2016-02-29 | 2016-04-20 | 东南大学 | Magnetic chain paralleled double-rotor combined motor |
| CN110611413A (en) * | 2019-11-01 | 2019-12-24 | 南京航空航天大学 | Multiphase disc type hybrid excitation flux switching motor |
| CN113067446A (en) * | 2021-05-20 | 2021-07-02 | 河北工业大学 | Double-modularization hybrid excitation flux switching motor |
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2021
- 2021-07-26 CN CN202110841368.0A patent/CN113285571B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050225198A1 (en) * | 2004-04-08 | 2005-10-13 | Siemens Vdo Automotive Inc. | Two speed electric motor with link wound dual-commutator and dual-armature winding |
| CN101924437A (en) * | 2005-12-27 | 2010-12-22 | 中国科学院电工研究所 | Dual-mechanical port motor and drive control system thereof |
| CN102957260A (en) * | 2011-08-24 | 2013-03-06 | 余虹锦 | Direct-drive composite permanent magnet motor with magnetic transmission and dual-stator structure |
| CN103248313A (en) * | 2012-02-03 | 2013-08-14 | 株式会社安川电机 | Rotary electric machine system |
| CN103051134A (en) * | 2012-12-26 | 2013-04-17 | 南昌大学 | Serial-magnetic-circuit hybrid-excitation permanent magnet motor |
| CN103296798A (en) * | 2013-05-15 | 2013-09-11 | 东南大学 | Stator surface-mounted type doubly salient permanent magnet motor with double-speed windings |
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| CN105515313A (en) * | 2016-02-29 | 2016-04-20 | 东南大学 | Magnetic chain paralleled double-rotor combined motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498993A (en) * | 2021-12-30 | 2022-05-13 | 西安中车永电捷力风能有限公司 | Compact semi-direct-drive permanent magnet synchronous wind driven generator |
| CN114498993B (en) * | 2021-12-30 | 2024-03-26 | 西安中车永电捷力风能有限公司 | Compact semi-direct-drive permanent magnet synchronous wind driven generator |
| CN115065178A (en) * | 2022-06-06 | 2022-09-16 | 河北工业大学 | Integrated double-module flux reversal motor of vehicle-mounted charger |
| CN115065178B (en) * | 2022-06-06 | 2024-06-11 | 河北工业大学 | Integrated two-module magnetic flux reversing motor of vehicle-mounted charger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113285571B (en) | 2021-11-09 |
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Effective date of registration: 20210927 Address after: No.5340 Xiping Road, Shuangkou Town, Beichen District, Tianjin Applicant after: Hebei University of Technology Address before: 300000 room 402-19, gate 8, block F, Haitai green industrial base, Haitai development liudao, Huayuan Industrial Zone, Binhai New Area, Tianjin Applicant before: Tianjin East van Polytron Technologies Inc. Applicant before: Hebei University of Technology |
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