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WO2009100600A1 - Générateur d'énergie synchrone à élimination des harmoniques à basse vitesse - Google Patents

Générateur d'énergie synchrone à élimination des harmoniques à basse vitesse Download PDF

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Publication number
WO2009100600A1
WO2009100600A1 PCT/CN2008/000888 CN2008000888W WO2009100600A1 WO 2009100600 A1 WO2009100600 A1 WO 2009100600A1 CN 2008000888 W CN2008000888 W CN 2008000888W WO 2009100600 A1 WO2009100600 A1 WO 2009100600A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
rotor
claw
coil
circumference
Prior art date
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.)
Ceased
Application number
PCT/CN2008/000888
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English (en)
Chinese (zh)
Inventor
Guangshun Wang
Xuelin Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2009100600A1 publication Critical patent/WO2009100600A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings

Definitions

  • the utility model relates to a generator, in particular to a low-speed harmonic elimination synchronous generator. Background technique
  • the global wind energy is about 2.74xl 09MW, of which the available wind energy is 2> 107MW, which is 10 times larger than the total amount of water energy that can be developed and utilized on the earth.
  • the wind turbine uses wind energy to drive the blades to drive the main shaft.
  • the stator and the rotor are relatively displaced, the magnetic lines of force are cut, and a current is generated in the coil.
  • the low-speed direct-drive generator has a large diameter and a large number of pole pairs.
  • the generator uniformly divides the inner diameter circumference of the stator core into two 1 ⁇ sector group, in each sector group A, B, C three phases each occupying the same area, one sector belongs to one phase, and the stator core of each sector is evenly arranged with k 2 large teeth, one large groove is arranged between two adjacent large teeth, the pitch of adjacent large teeth is one pole distance, and the stator core between two adjacent sectors is respectively provided with 1 A small slot, a small tooth is arranged between the two small slots, and each large tooth is wound with a full-circle concentrated coil.
  • the end of the generator coil of the invention is the shortest, and the concentrated coil ends on each tooth are not laminated to each other; the entire concentrated coil on each tooth is continuously wound from the first tooth to the last tooth, which is very suitable for mechanical winding. It is easy to repair and replace, and the generator can smoothly output electric power.
  • the arrangement of the small groove and the small tooth solves the problem that the phase angles between the phases of the three-phase alternating current A, B and C should be different by 120 degrees.
  • this structure also brings about the uneven distribution of the iron core groove, the structure is complicated, and the manufacturing difficulty is large.
  • the output current harmonic is serious, and it is difficult to meet the requirements of the direct grid-connected power generation of the wind power generator.
  • the purpose of the utility model is to provide a low-speed harmonic elimination synchronous generator which is simple in structure, low in processing and manufacturing, low in output voltage harmonic content, and can directly output sinusoidal alternating current and grid-connected power generation without requiring an upshift gearbox.
  • the low-speed harmonic elimination synchronous generator of the present invention comprises a casing and a spindle mounted in the casing, and rotates
  • the rotor is fixedly mounted on the main shaft, and a plurality of magnetic poles are evenly distributed on the circumference of the rotor.
  • a stator core is fixedly mounted in the outer casing, and stator coils are arranged in the stator core, and the characteristics are: averaging the circumference of the stator core Divided into two or more stator sector groups, each of which has an equal number of uniformly distributed coil slots, and the width of the teeth between any two adjacent coil slots on the stator core is the same;
  • the corresponding rotor is equally divided into two or more rotor sector groups on the circumference, the number of rotor sector groups is the same as the number of stator sector groups, and each rotor sector group has an equal number of uniformly distributed magnetic poles, each of which The number of coil slots in the stator sector group is different from the number of magnetic poles in one rotor sector group, and the pole pitches of any two adjacent magnetic poles on the circumference of the rotor are equal; three-phase coils are arranged in
  • the rotor comprises two claw plates arranged opposite each other, and a permanent magnet and a field core are fixedly mounted between the two claw plates, and an excitation coil is wound on the excitation core, and the permanent magnet and the iron core are evenly distributed around the main shaft.
  • a connecting sleeve is fixedly mounted on the main shaft by a flat key, and two claw plates are fixedly mounted on both ends of the connecting sleeve respectively; the claw plates are disc-shaped, and the edge portions thereof are uniformly distributed with a plurality of toothed claw poles along the circumference.
  • the claw pole is a magnetic pole, and the two claw plates are arranged in parallel in a staggered arrangement of claw poles, and two claw poles having different magnetic properties are formed to form one magnetic pole pair.
  • the coil grooves of the stator coil are evenly distributed, the structure is simple, the production and processing are difficult, the raw materials are saved, and the cost is reduced;
  • the output voltage harmonic content is low, which can meet the requirements of direct grid-connected power generation
  • the rotor and stator core are divided into multiple sector groups of the same structure, which can realize rapid production of large-diameter generators, reduce production and transportation costs, and facilitate maintenance;
  • the magnetic torque of the tooth is small, easy to start, the vibration amplitude and noise of the generator are greatly reduced, and the speed of the generator can be increased accordingly, so that the output power is large.
  • the method of changing the magnetic flux by the excitation coil adjusts the output voltage and reactive power, the excitation power consumption is low, the action is fast, the output voltage adjustment range is large, and the requirements of various working conditions can be met;
  • the rotor and stator are directly mounted on the same shaft.
  • the installation accuracy is high, and the air gap between the rotor and the stator core is greatly reduced, which can greatly reduce the manufacturing cost and the dynamic magnetic energy consumption.
  • FIG. 1 is a schematic structural view of an embodiment of the present invention
  • Figure 2 is a cross-sectional view taken along line A-A of Figure 1;
  • Figure 3 is a schematic view showing the structure of the claw plate
  • Figure 4 is a vector diagram of the output voltage
  • Fig. 5 is a schematic view showing the structure of the coil groove. detailed description
  • the low-speed harmonic elimination synchronous generator of the present invention comprises a casing 1 and a main shaft 3 and a rotor installed in the casing 1.
  • the rotor is fixedly mounted on the main shaft 3 on the circumference of the rotor.
  • the plurality of magnetic poles 9 are evenly distributed, and the pole pitches of any two adjacent magnetic poles 9 on the circumference of the rotor are equal.
  • a stator core 7 is fixedly mounted in the outer casing 1, and a stator coil 12 is disposed in the stator core 7.
  • the circumference of the stator core 7 is equally divided into two or more stator sector groups, each of which has an equal number of uniformly distributed coil slots 8, and any two adjacent coil slots 8 on the stator core 7
  • the width of the inter-tooth is the same; in this embodiment, two sets of stator sector groups are used, each group of stator sectors is a sector of 180 degrees, and 18 coil slots 8 of equal size are evenly distributed in each stator sector group.
  • the three-phase stator coils 12 each occupy six consecutive coil slots, as shown in FIG.
  • the number of stator sector groups and coil slots 8 can be set as needed, and the number of coil slots 8 in each stator sector group is an integer multiple of 3 and greater than or equal to 6 slots.
  • stator sector groups When the number of stator sector groups is more than two, the radial magnetic forces of the main shaft 3 cancel each other, which is beneficial to reduce vibration during the operation of the generator, reduce noise, and prolong the service life of the main shaft 3.
  • the number of coil slots 8 and the winding of the stator coil 12 are well known and will not be described in detail herein.
  • the rotor includes two claw plates 2 disposed opposite to each other, and a permanent magnet 4 and an iron core 51 are fixedly mounted between the two claw plates 2, and the exciting coil 5 is wound on the iron core 51, and both ends of the exciting coil 5 pass through
  • the slip ring 11 is connected to an external circuit.
  • the permanent magnet 4 and the iron core 51 are evenly distributed around the main shaft 1, and the connecting sleeve 6 is fixedly mounted on the main shaft 3 by a flat key, and the two claw plates 2 are fixedly mounted on both ends of the connecting sleeve 6, respectively; the claw plate 2 In the shape of a disk, the edge portion thereof uniformly distributes a plurality of toothed claw poles 21 circumferentially.
  • the two claw plates 2 are arranged in parallel in a staggered arrangement of the claw poles 21, and two claw poles 21 having different magnetic properties are formed adjacent to each other to constitute a magnetic pole pair.
  • the rotor corresponding to the stator sector group is equally divided into two or more rotor sector groups on the circumference of the rotor, the rotor
  • the number of sector groups is the same as the number of stator sector groups. In this embodiment, when there are two stator sector groups, the number of rotor sector groups should also be two.
  • Each rotor sector group has an equal number of uniformly distributed magnetic poles 9. The number of magnetic poles 9 in each rotor sector group is different from the number of coil slots in one stator sector group, which may be two or more. Can be two less.
  • the number of magnetic poles 9 in the corresponding rotor sector group is 20, and of course, the number of magnetic poles 9 may also be 16;
  • Three-phase stator coils 12 are disposed in the coil slots of each stator sector group, and each phase stator coil 12 occupies six consecutive coil slots in a winding manner, as shown in FIG. 5, and according to three-phase alternating current Y The connection of the three-phase windings is connected together.
  • the rotor When working, the rotor is in a composite excitation mode, and the magnetic flux generated by the permanent magnet 4 and the exciting coil 5 reaches the claw pole 21 through the guidance of the claw plate 2, and a strong magnetic field is generated between the two sets of opposite claw poles 21, and the power mechanism drives the spindle.
  • the rotation of 3 causes the strong magnetic field generated between the claw poles 21 to rotate around the main shaft 1, and generates a relative motion of the cutting magnetic lines of force with the stationary stator coil 12, generating an electric potential in the stator coil 12.
  • the potential is converted to an electrical energy output through a corresponding circuit connection.
  • the intensity of the combined magnetic field generated between the claw poles 21 can be changed by adjusting the magnitude of the exciting current in the exciting coil 5 by an external circuit, thereby finally changing the voltage for changing the output electric energy.
  • This portion of the external adjustment circuit is a prior art and will not be discussed in detail herein.
  • the magnetic phase angle is increased by 360 degrees, and the phases of A, B, and C are increased.
  • the electromotive forces generated by the stator coils 12 form a phase angle difference of 120 degrees with each other, which exactly meets the requirements of three-phase alternating current. Since the number of magnetic poles 9 is not equal to the number of coil slots 8, the phase angles of the potentials generated in the respective coil slots 8 are sequentially shifted, and the deviation of such phase angles is accumulated one by one.
  • the electromotive force generated in the six coil slots 8 of the phase Since the electromotive force of each phase is superimposed by the electromotive force of different phase angles, the harmonic voltage content generated after the superposition of the potentials of different phase angles is greatly reduced, and the fundamental wave is connected. The near sine wave facilitates direct grid-connected power generation.
  • magnetic poles 9 can also be directly used as ordinary permanent magnets, as long as the number and arrangement thereof meet the above requirements.
  • the synthetic tooth magnetic torque of the generator is greatly reduced, which is beneficial to the starting of the wind power generator and reduces the vibration amplitude.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un générateur d'énergie synchrone à élimination des harmoniques à basse vitesse. Le générateur comprend un boîtier (1) et un arbre principal (3), un rotor et un noyau en fer de stator (7) montés dans le boîtier (1). La circonférence du noyau en fer de stator (7) est divisée en au moins deux groupes de secteurs de stator et la circonférence du rotor est divisée en au moins deux groupes de secteurs de rotor correspondants. Le nombre de rainures de bobine (8) est égal dans chaque groupe de secteurs de stator. Le nombre de pôles magnétiques (9) est égal dans chaque groupe de secteurs de rotor. La différence entre le nombre de pôles magnétiques (9) dans chaque groupe de secteurs de rotor et le nombre de rainures de bobine (8) dans chaque groupe de secteurs de stator est égale à 2.
PCT/CN2008/000888 2008-02-15 2008-04-30 Générateur d'énergie synchrone à élimination des harmoniques à basse vitesse Ceased WO2009100600A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2008100145607A CN101510712A (zh) 2008-02-15 2008-02-15 低速消谐同步发电机
CN200810014560.7 2008-02-15

Publications (1)

Publication Number Publication Date
WO2009100600A1 true WO2009100600A1 (fr) 2009-08-20

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PCT/CN2008/000888 Ceased WO2009100600A1 (fr) 2008-02-15 2008-04-30 Générateur d'énergie synchrone à élimination des harmoniques à basse vitesse

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CN (1) CN101510712A (fr)
WO (1) WO2009100600A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101205674B1 (ko) 2010-11-03 2012-11-27 선상규 개량된 형태의 저속발전기

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106505765B (zh) * 2016-11-26 2018-10-16 华中科技大学 一种永磁轴向磁通的半空心脉冲发电机
CN109861359B (zh) * 2019-04-12 2023-08-22 重庆交通职业学院 一种汽车的震动发电装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1208893C (zh) * 1999-05-25 2005-06-29 智能发动机联合股份有限公司 低速电机
JP2005304271A (ja) * 2004-04-16 2005-10-27 Hitachi Ltd 同期発電機及び風力発電システム
CN1866694A (zh) * 2006-06-09 2006-11-22 天津大学 模块化定子结构直驱型低速永磁同步风力发电机
CN1933286A (zh) * 2006-08-29 2007-03-21 林祥钟 一种新型永磁无刷直流四象限电机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1208893C (zh) * 1999-05-25 2005-06-29 智能发动机联合股份有限公司 低速电机
JP2005304271A (ja) * 2004-04-16 2005-10-27 Hitachi Ltd 同期発電機及び風力発電システム
CN1866694A (zh) * 2006-06-09 2006-11-22 天津大学 模块化定子结构直驱型低速永磁同步风力发电机
CN1933286A (zh) * 2006-08-29 2007-03-21 林祥钟 一种新型永磁无刷直流四象限电机

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101205674B1 (ko) 2010-11-03 2012-11-27 선상규 개량된 형태의 저속발전기

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Publication number Publication date
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