WO2008004266A2 - Générateur asynchrone à double vitesse variable - Google Patents

Générateur asynchrone à double vitesse variable Download PDF

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Publication number
WO2008004266A2
WO2008004266A2 PCT/IT2007/000480 IT2007000480W WO2008004266A2 WO 2008004266 A2 WO2008004266 A2 WO 2008004266A2 IT 2007000480 W IT2007000480 W IT 2007000480W WO 2008004266 A2 WO2008004266 A2 WO 2008004266A2
Authority
WO
WIPO (PCT)
Prior art keywords
generator
rotor
shaft
variable speed
power grid
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/IT2007/000480
Other languages
English (en)
Other versions
WO2008004266A3 (fr
Inventor
Vladimiro Lidak
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.)
K4A Srl
Original Assignee
K4A Srl
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 K4A Srl filed Critical K4A Srl
Publication of WO2008004266A2 publication Critical patent/WO2008004266A2/fr
Publication of WO2008004266A3 publication Critical patent/WO2008004266A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/02—Machines with one stator and two or more rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/42—Asynchronous induction generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/34—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter
    • H02K17/36—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter with another asynchronous induction motor

Definitions

  • the present patent request for industrial creation concerns a variable speed electric generator grid connected, designed to deliver the generated electric power to a three-phases power grid, starting from irregularly variable mechanical energy sources.
  • This generator delivers the power to the grid always at the same grid frequency and voltage, independently from the speed and the orientation of the prime mover, from which depends the amount of the generated power.
  • tradictional asynchronous generators are commonly used, connected to a power grid, mechanically driven by prime movers in iper-synchrounous operations, above which the induction motor becomes generator.
  • This kind of applications on a side consents to generate electric energy at the same grid frequency and voltage also with prime 1 movers characterized by variable speed, on the other side its use is limited by the necessity to achieve high speed, near the synchronous one.
  • Other power plants with prime movers, characterized by a highly variable speed are equipped with syncronous generators, with variable frequency and speed, connected to the power grid by means of power converters (solid state or rotary) to make the frequency and the voltage consistent with the power grid requirements.
  • a second aim of the invention is to design an asyncronous generator that could be directly connected to the power grid so to supply the generated power at its own frequency and voltage.
  • a third aim of the invention is to propose an asynchronous generator that could be powered by different types of prime movers, with different dimensions and that could be connected to a power grid without complex regulation and control devices.
  • a fourth purpose of this invention is to design a generator connected to the power grid which could produce electric energy independently by the rotation direction of the prime mover.
  • asynchronous generator characterized from a synchronous speed equal to zero and therefore it becomes a generator at any angular speed different from zero, which is5 imposed by the main shaft driven by a variable speed prime mover.
  • Fig.1 shows a first executive embodiment.
  • the generator is obtained by joining rigidly the shafts of both the three-phases5 asynchronous motors (a) and (b), with squirrel cage, with a bushing (c) forced on the motor shafts (f) and (g); the case of the motor (b) is free to rotate respect to the case (a), which is anchored to a basement (t); the terminals (d f ) of stator winding are connected to the power grid (r) by means of the collector with slip0 rings (e) and the brushes (s); the terminals of statoric winding (d) of the machine (a) are also connected to the line (r).
  • the rotor will be dragged and will tend to slow down his speed respect to the case of (a); the machine (a) will take the function of brake motor.
  • the rotor of the machine (a) will assume the angularspeed ⁇ a , respect to his stator, lower than ⁇ s : this
  • FIG. 2 shows schematically a section of a second embodiment which realizes the invention in a compact single machine that is composed of a case with a core (a) and relative (a 1 ) statoric loo winding connected to a power grid by a terminal box (d) and a rotor core (b) with rotoric winding (b 1 ) similar to the statoric winding (a'); the rotor core is assembled to the driving shaft (m), supported in the case by means of revolving bearing (n); the rotor winding is connected to the power grid with a collector with slip
  • the hollow element (c) is : arranged between the stator and rotor, separated by two air-gaps (u 1 ) and (u"), free to turn on the revolving bearing (o) around the shaft (m).
  • This element (c) is realized. with the well-known technique of the 110 squirrell cage rotor, and it is composed by a cylindrical hollow core realized with a stack of iron laminations like in Fig.3.
  • the core is designed with slots arranged longitudinally on the ' outside and inside surfaces, with conductor bars set into grooves • and connected together at both ends by shorting rings forming two us cage-like shape, so to realize two short circuits windings that interact respectively with the stator (a) and with the rotor (b).
  • the, rotor (c) When the machine is connected to the power grid, the, rotor (c) is freely rotating at the synchronous speed. If the shaft (m), mechanically linked to the prime mover, is rotating, the machine 120 behaviour is like that described before, about the first embodiment of the invention.

Landscapes

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

Abstract

La présente invention concerne un générateur électrique utilisé comme élément d'une commande électrique fonctionnant à vitesse variable et pouvant alimenter en énergie électrique un réseau électrique triphasé. Le générateur comprend principalement un enroulement du stator dont le noyau est logé dans le carter du générateur; un enroulement du rotor dont le noyau est fixé à l'arbre du générateur. Une bague collectrice est montée sur l'arbre, en appui et tournant à l'intérieur du carter. Un noyau ferromagnétique cylindrique creux présente des fentes dans lesquelles des barres conductrices sont disposées. Ce noyau cylindrique est un élément rigide qui tourne librement entre le stator et le rotor au moyen de roulements rotatifs disposés sur le même arbre du générateur ou dans le carter.
PCT/IT2007/000480 2006-07-06 2007-07-04 Générateur asynchrone à double vitesse variable Ceased WO2008004266A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITNA20060083 ITNA20060083A1 (it) 2006-07-06 2006-07-06 Generatore elettrico asincrono per motori primi a velocita' variabile.
ITNA2006A000083 2006-07-06

Publications (2)

Publication Number Publication Date
WO2008004266A2 true WO2008004266A2 (fr) 2008-01-10
WO2008004266A3 WO2008004266A3 (fr) 2008-02-21

Family

ID=38722675

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2007/000480 Ceased WO2008004266A2 (fr) 2006-07-06 2007-07-04 Générateur asynchrone à double vitesse variable

Country Status (2)

Country Link
IT (1) ITNA20060083A1 (fr)
WO (1) WO2008004266A2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2211446A1 (fr) * 2009-01-23 2010-07-28 Mikayel M. Tayegyan Machine asynchrone
CN102142748A (zh) * 2011-02-23 2011-08-03 中科盛创（青岛）电气有限公司 集成化高强度转子结构的鼠笼型直驱风力发电机
CN102790477A (zh) * 2011-05-20 2012-11-21 中国南车集团襄樊牵引电机有限公司 一种大型箱式高压异步电机装配方法
CN103595203A (zh) * 2013-10-18 2014-02-19 孙屹东 一种异步永磁同步发电机
KR101498360B1 (ko) * 2013-05-08 2015-03-03 이성강 고성능의 발전장치
CN105706342A (zh) * 2013-11-14 2016-06-22 Arm 有限公司 电控通用发动机
CN108011364A (zh) * 2017-11-28 2018-05-08 郑州轻工业学院 一种分析dfig动力学特性与电力系统动态交互影响的方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR345137A (fr) * 1904-07-23 1904-11-22 Rodier Soc Peigne à tisser permettant d'obtenir soit des jours dans le tissu, soit des effets de broderie
CH125570A (de) * 1927-03-03 1928-04-16 Meidinger & Cie G Wechselstromdoppelmotor mit zwei koachsial ineinanderliegenden Läufern von zwei Asynchronmotoren.
GB831967A (en) * 1956-05-16 1960-04-06 Loewy Eng Co Ltd Electrical drive for transport rollers
DE1196776B (de) * 1961-02-23 1965-07-15 Licentia Gmbh Elektrischer Umkehrantrieb
DE1638349B1 (de) * 1967-01-27 1971-03-04 Licentia Gmbh Drehzahlumschaltbarer induktionsmotor insbesondere fuer waschautomaten
DE4024269A1 (de) * 1990-07-31 1992-02-13 Born Sen Rainer Elektrischer generator mit drehmomentwandlerfunktion

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2211446A1 (fr) * 2009-01-23 2010-07-28 Mikayel M. Tayegyan Machine asynchrone
CN102142748A (zh) * 2011-02-23 2011-08-03 中科盛创（青岛）电气有限公司 集成化高强度转子结构的鼠笼型直驱风力发电机
CN102790477A (zh) * 2011-05-20 2012-11-21 中国南车集团襄樊牵引电机有限公司 一种大型箱式高压异步电机装配方法
KR101498360B1 (ko) * 2013-05-08 2015-03-03 이성강 고성능의 발전장치
CN103595203A (zh) * 2013-10-18 2014-02-19 孙屹东 一种异步永磁同步发电机
CN105706342A (zh) * 2013-11-14 2016-06-22 Arm 有限公司 电控通用发动机
CN105706342B (zh) * 2013-11-14 2019-11-08 Arm 有限公司 电控通用发动机
CN108011364A (zh) * 2017-11-28 2018-05-08 郑州轻工业学院 一种分析dfig动力学特性与电力系统动态交互影响的方法
CN108011364B (zh) * 2017-11-28 2019-02-22 郑州轻工业学院 一种分析dfig动力学特性与电力系统动态交互影响的方法

Also Published As

Publication number Publication date
WO2008004266A3 (fr) 2008-02-21
ITNA20060083A1 (it) 2008-01-07

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