BG63444B1 - Асинхронен преобразувател и генератор - Google Patents
Асинхронен преобразувател и генератор Download PDFInfo
- Publication number
- BG63444B1 BG63444B1 BG102926A BG10292698A BG63444B1 BG 63444 B1 BG63444 B1 BG 63444B1 BG 102926 A BG102926 A BG 102926A BG 10292698 A BG10292698 A BG 10292698A BG 63444 B1 BG63444 B1 BG 63444B1
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- Bulgaria
- Prior art keywords
- rotor
- primary
- frequency
- stator
- generator
- Prior art date
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- 239000004020 conductor Substances 0.000 claims abstract description 31
- 238000004804 winding Methods 0.000 claims abstract description 29
- 238000009413 insulation Methods 0.000 claims abstract description 25
- 239000004065 semiconductor Substances 0.000 claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims 1
- 230000006698 induction Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection
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- 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
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
- H02K11/05—Rectifiers associated with casings, enclosures or brackets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
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- 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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
- H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F2027/2833—Wires using coaxial cable as wire
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F2027/329—Insulation with semiconducting layer, e.g. to reduce corona effect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
- H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias
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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
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/15—Machines characterised by cable windings, e.g. high-voltage cables, ribbon cables
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S174/00—Electricity: conductors and insulators
- Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
- Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10S174/00—Electricity: conductors and insulators
- Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
- Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
- Y10S174/15—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in a power generation system, e.g. prime-mover dynamo, generator system
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
- Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
- Y10S174/17—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in an electric power conversion, regulation, or protection system
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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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
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- Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
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- Y10S174/19—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in a dynamo-electric machine
- Y10S174/20—Stator
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- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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- Y10S174/19—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in a dynamo-electric machine
- Y10S174/22—Winding per se
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- Y10S174/24—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in an inductive device, e.g. reactor, electromagnet
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Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Windings For Motors And Generators (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Manufacture Of Motors, Generators (AREA)
- Control Of Eletrric Generators (AREA)
- Emergency Protection Circuit Devices (AREA)
- Coils Of Transformers For General Uses (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Synchronous Machinery (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Coils Or Transformers For Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Изобретението се отнася до преобразувател и генератор за свързване на електромрежи, работещи с различна честота. Преобразувателят включва първичен статор, свързан с първична променливотокова мрежа с първична честота (f1), и вторичен статор, свързан с вторична променливотокова мрежа с вторична честота (f2). Преобразувателят има също така ротор, който се върти в зависимост от честотите (f1, f2). Всеки от статорите съдържа поне една намотка, всяка от които включва поне един токопровеждащ проводники система за изолиране, състояща се от поне два полупроводникови слоя. Всеки слой образува еквипотенциална повърхнина, а между слоевете има твърда изолация.
Description
(54) АСИНХРОНЕН ПРЕОБРАЗУВАТЕЛ И ГЕНЕРАТОР
Област на техниката
Изобретението се отнася до асинхронен преобразувател в съответствие с встъпителната част на претенции 1, 10 и 19 и употребата на такъв преобразувател.
Изобретението също се отнася до генератор в съответствие с встъпителната част на претенции 20 и 29.
Предшестващо състояние на техниката
В много случаи обмяна на мощност може да се осъществи между променливотокови мрежи с различни или поне с несинхрон- 2θ ни честоти. Най-често срещаните случаи са следните:
1. Свързване на несинхронни трифаз- ни мрежи с еднакви номинални честоти, т.е. между Източна и Западна Европа. 25
2. Свързване на трифазни мрежи с различни честоти, най-често 50 Hz/60 Hz (т.е. Япония, Латинска Америка).
3. Свързване на трифазни мрежи и ниска честота, еднофазни/двуфазни мрежи за захранване на жп линии, в Европа 50 Hz/16, 2/3 Hz, в САЩ 60 Hz/25 Hz.
4. Употребата на асинхронни преобразуватели като последователни компенсатори в далекопроводи за променлив ток. ^5
Днес свързването се извършва с помощта на мощна електроника и постояннотокова междинна връзка. В гореспоменатите случаи 2 и 3 връзката по-нататък може да се изпълни с помощта на матрични преобразуватели. В случая на синхронни, но различни честоти, в гореспоменатите случаи 2 и 3 връзката по-нататък може да се осъществи с помощта на ротационни преобразуватели, включващи свързани синхронни машини.
В статията “Изследване и употреба на асинхронни машини в системи за пренос на мощност”, Електрически технологии СССР, № 4, 90-99, 1985, от Н.И. Блоцкий, е показана синхронна машина, използвана за вътрешна връзка в система за пренос на мощност, и нейните елементи, които имат раз лични номинални честоти или имат еднакви номинални честоти, но се различават по степента на точност на резервните части, с които машината трябва да се поддържа. Конструкция на асинхронна машина е показана на фиг. 1. Асинхронната машина включва електрическа машина 1, която е с конвенционален трифазен статор и неявнополюсен симетричен ротор или като варианти електрически асиметричен ротор с един явен полюс или с един неявен полюс; фазовите проводници са свързани към плъзгащи се пръстени; възбудител 2, който представлява циклопреобразувател или обратим управляем изправител; захранване на циклопреобразувателя 3 или 4; регулатор 5, който задава закона за управление, необходим за напреженията на роторните пръстени и ъгъла на положението на главния ротор на машината и датчиците за скорост 6, напрежение 7 и ток 9 на статора и ротора.
В статията “Параметрични характеристики на широка гама честотни преобразуватели от индукционен тип”, списание ΙΕΕΜΑ, том 125, № 9, 21-34, септември, 1995, от Г.А. Гонеем, е показан честотен преобразувател от индукционен тип, като източник на променлива честота за управление на скоростта на задвижвания за индукционни двигатели. На фиг. 2 е показана схематична диаграма на честотен преобразувател от индукционен тип. Честотният преобразувател от индукционен тип се състои от две механично и електрически свързани индукционни машини с навит ротор А, В. Статорните намотки на едната от тях (А) са свързани към трифазно захранване при честота на линията (Vi, Fi), докато статорните намотки на другата машина (В) представляват изход на променлива честота (Vo, Fo). Роторните намотки 10, 12 на двете машини са свързани заедно със специално разположение. Преобразувателят се задвижва от пусково устройство 14, като може да се използва постояннотоков двигател.
Статичните преобразуватели имат недостатъци, изразяващи се в сравнително нисък кпд (около 95%), дължащ се на загубите в полупроводниците и хармоници, които трябва да компенсират с помощта на филтри. Употребата на постояннотокова междинна връзка води до използването на спе циални преобразуващи трансформатори с много сложна конструкция. Филтрите изискват много пространство в общата схема. Конвенционалните преобразуватели не са конструирани да издържат високи напрежения, така че се налага вграждане на трансформатор от всяка страна на свързването към променливотоковата мрежа. В този случай кпд става сравним или дори по-нисък от този на статичния преобразувател.
Техническа същност на изобретението
Цел на изобретението е да се решат гореописаните проблеми и да се осигури ротационен асинхронен преобразувател за свързване на променливотокови мрежи с еднакви или различни честоти. Тази цел се постига с осигуряването на асинхронен преобразувател, определен във встъпителната част на претенции 1, 10 или 19, и с преимуществата, изложени в същината на споменатите претенции.
В съответствие с изобретението преобразувателят включва първичен статор, свързан към първична променливотокова мрежа с първична честота fp и вторичен статор, свързан с вторична променливотокова мрежа с вторична честота f2. Преобразувателят също включва ротор, който се върти в зависимост от първичната и вторичната честота fpf2. Всеки от статорите включва поне една намотка, където всяка намотка включва поне един токоносещ проводник и всяка намотка включва система за изолиране, която, от една страна, включва поне два полупроводникови слоя, където всеки слой образува еквипотенциална повърхнина, а, от друга страна, между слоевете е поставена твърда изолация.
Според друго изпълнение на преобразувателя той включва първичен статор, свързан с първична променливотокова мрежа с първична честота fp и вторичен статор, свързан с вторична променливотокова мрежа с вторична честота f2. Преобразувателят също включва ротор, който се върти в зависимост от посочените първична и вторична честота fp f2. Всеки от статорите включва поне по една намотка, като всяка намотка включва един токопровеждащ проводник. Всеки проводник включва определен брой снопчета, около този проводник е поставен вътрешен полупроводников слой, около този вътрешен полупроводников слой е поставен изолационен слой от твърда изолация, а около посочения изолационен слой е поставен външен полупроводников слой.
Според друго изпълнение на преобразувателя той включва първичен статор, свързан към първична променливотокова мрежа с първична честота fp и вторичен статор, свързан с вторична променливотокова мрежа с вторична честота f2. Преобразувателят също включва ротор, който се върти в зависимост от първичната и вторичната честота fpf2 Всеки статор включва поне една намотка, където всяка намотка включва изолационна система, която по отношение на своите термични и електрически качества позволява нивото на напрежението в асинхронния преобразувател да превишава 36 kV.
Много важно предимство на изобретението, както е определено в претенции 1, 10 или 19, е това, че е възможно да се постигне свързване на две несинхронни мрежи, без да се използват трансформатори или друго оборудване. Друго предимство е високият кпд, който се очаква да бъде 99%.
С конструирането на изолационна система, която е подходящо да бъде твърда, така че от термична и електрическа гледна точка да бъде оразмерена за напрежения над 36 kV, системата може да се свързва към високоволтови силови мрежи, без да се използват междинни понижаващи трансформатори, и се постигат горепосочените предимства. Такава система е за предпочитане, без да е необходимо да се конструира по начин, който включва особеностите на ротационния асинхронен преобразувател съгласно всяка от претенциите от 1 до 19.
Друга цел на изобретението е да реши гореспоменатите проблеми и да осигури и генератор с променлива скорост на въртене. Тази цел се постига с осигуряване на генератор, описан във встъпителната част на претенция 20 или 29, с преимуществени особености съгласно същината на тези претенции.
Генераторът включва статор, свързан към променливотокова мрежа с честота първичен цилиндричен ротор, свързан с турбина, която се върти с честота f,. Генераторът също включва съставен ротор, който се върти в зависимост от честотите f,,fr Статорът и първичният цилиндричен ротор включват поне по една намотка, където всяка намотка включва поне по един токоносещ проводник и всяка намотка включва изолационна система, която се състои, от една страна, от поне два полупроводникови слоя, където всеки слой образува еквипотенциална повърхнина, а, от друга страна, между тях е разположена твърда изолация.
Според друго изпълнение на генератора той включва статор, свързан с променливотокова мрежа с честота f2, и първичен цилиндричен ротор, свързан с турбина, която се върти с честота f(.
Генераторът също включва съставен ротор, който се върти в зависимост от честотите fpf2 Статорът и първичният цилиндричен ротор включват поне една намотка, където всяка намотка включва един кабел, състоящ се от поне един токоносещ проводник, като всеки проводник се състои от определен брой снопчета. Около този проводник се поставя вътрешен полупроводников слой, около него се поставя изолационен слой от твърда изолация, а около този изолационен слой се поставя външен полупроводников слой.
Гореспоменатите и други предпочитани изпълнения съгласно изобретението са определени в съответните претенции.
В определен аспект изобретението е свързано с употребата на асинхронния преобразувател съгласно изобретението в специфични приложения като тези, определени в претенции 38-41, в които предимствата на изобретеното устройство са практически изявени.
Описание на приложените фигури
Същността на изобретението ще бъде пояснена в съответствие с приложените чертежи, в които:
фигура 1 показва схематична диаграма на асинхронна машина, използвана за вътрешно свързване в система за пренасяне на електрическа мощност, съгласно конвенционално изпълнение;
фигура 2 - схематична диаграма на честотен преобразувател от индукционен тип, като източник на променлива честота, съгласно конвенционално изпълнение;
фигура 3 - елементите, включени в стандартен токов кабел с модификации;
фигура 4 - първо изпълнение на асинхронен преобразувател, съгласно изобретението;
фигура 5 - второ изпълнение на асинхронен преобразувател, съгласно изобретението;
фигура 6 - първо изпълнение на генератора, съгласно изобретението, и фигура 7 - второ изпълнение на генератора, съгласно изибретението.
Примери за изпълнение
Предпочитано изпълнение на подобрения кабел е показано на фиг. 3. Кабелът 20, съгласно фигурата, включва токоносещ проводник 22, който включва кръстосани изолирани и неизолирани жила. Вътрешната полупроводникова обвивка 24 е екструдирана, кръстосана по електромеханичен начин, която от своя страна е обвита от външен полупроводников слой 28. Кабелът се използва като намотка в предпочитаното изпълнение и няма метална броня и външен екран.
За предпочитане е поне два от тези слоеве, а най-добре всичките от тях, да имат еднакви коефициенти на термично разширение. По този начин се постига основното преимущество, че в случай на термични движения на намотката се избягват дефекти, пукнатини и пр.
На фиг. 4 е показано едно първо изпълнение на ротационен асинхронен преобразувател 30, съгласно изобретението. Асинхронният преобразувател 30 се използва за свързване на променливотокови мрежи с еднакви или различни честоти. Преобразувателят 30 включва първичен статор 32, свързан към първична променливотокова мрежа (не е показана), имаща първична честота f(, и вторичен статор 34, свързан с вторична променливотокова мрежа (не е показана), имаща вторична честота ф В показаното изпълнение статорите 32, 34 са трифазни, включващи по три намотки всеки, като всяка намотка включва поне един токоносещ проводник, и изолираща система, която включва поне два полупроводникови слоя, където всеки слой образува еквипотенциал на повърхнина. От друга страна, между слоевете е поставена твърда изолация. Намотките могат да се образуват и от кабел от типа, показан на фиг. 3. Преобразувателят 30 също включва съставен ротор 36, който се върти в зависимост от първичната и вторичната честота f1 и f2. В показаното изпълнение съставният ротор 36 включва два електрически и механично свързани трифазни ротора 36( и 362, които са концентрично разположени спрямо посочените статори 32, 34. Преобразувателят 30 също включва спомагателно устройство 38, свързано към роторите 36j и 362 за стартиране на тези ротори с подходяща скорост на въртене, преди свързване на преобразувателя 30 с променливотоковите мрежи. Всеки ротор 36, и 362 включва една нисковолтова намотка (не е показана). Когато първичният статор 32 се свърже към трифазна променливотокова мрежа, имаща честота fp а вторият статор 34 се свърже към трифазна променливотокова мрежа, имаща честота f2, роторите 36( и 362 ще се въртят с честота (f,-f2) /2, а токът в статора ще има честота (^+^)/2. Кпд на системата с такъв преобразувател ще бъде много висок (~99%) при малки честотни разлики, поради факта, че цялата мощност се пренася както в трансформатор. Приемайки, че ί,<ί2, една част (f,-f2)/f2 от мощността се пренася механично, а останалата мощност ί,/ί2 се пренася с трансформаторно действие. Консумираната механична мощност служи само за да поддържа въртенето.
На фиг. 5 е показано второ изпълнение на асинхронен преобразувател 40 съгласно изобретението. Асинхронният преобразувател 40 също се използва за свързване на променливотокови мрежи с еднакви или различни честоти. Преобразувателят 40 включва първичен статор 42, свързан с първична променливотокова мрежа (не е показана), имаща първична честота f,, и вторичен статор 44, свързан с вторична променливотокова мрежа (не е показана), имаща вторична честота f2. В показаното изпълнение статорите 42, 44 са трифазни и включват по три намотки всеки, където всяка намотка може да бъде от типа, описан съгласно фиг. 4. Преобразувателят 40 също включва съставен ротор 46, който се върти в зависимост от първичната и вторичната честота fj и f2. В показаното изпълнение съставният ротор 46 включва само един ротор 46, разположен концентрично спрямо статорите 42, 44. Роторът 46 също включва първа проводникова навивка 48 и втора проводникова навивка 50, които са свързани една спрямо друга и са разположени една срещу друга в ротора 46. Проводниковите навивки 48, 50 са разделени от два сектора 52, и 522, които имат ъглова ширина а. Преобразувателят 40 също включва спомагателно устройство (не е показано), свързано към посочения ротор 46 за стартиране на ротора 46 с подходяща скорост на въртене, преди преобразувателят 40 да се свърже към променливотоковите мрежи. За да се компенсира честотната разлика Δί, роторът 46 трябва да се върти с честота ίκ=(π - α). Δί/4π, където Δ [f,-f2]. За а = π /4 това означава ίκ=3Δί/16, т.е. една много ниска честота на въртене. Основните предимства на това изпълнение са ниската честота на въртене и използването на само един ротор.
На фиг. 6 е показано първо изпълнение на генератора 60 с променлива скорост на въртене съгласно изобретението. Генераторът 60 включва статор 62, свързан към променливотокова мрежа (не е показана), имаща честота f2, и първичен цилиндричен ротор 64, свързан с турбина 66, която се върти с честота fr Генераторът 60 също включва съставен ротор 68, който се върти в зависимост от честотите f, и f2. Статорът 62 и първичният цилиндричен ротор 64 включват поне една намотка (не е показана). Всяка намотка включва поне един токоносещ проводник и една изолационна система, която, от една страна, се състои поне от два полупроводникови слоя, като всеки слой образува една еквипотенциална повърхнина, а, от друга страна, между тях е поставена твърда изолация. В друго изпълнение всяка намотка може да включва един кабел от типа, показан на фиг. 3. Съставният ротор 68 включва два електрически и механично свързани ротора 68t и 682, които са кухи и са разположени концентрично около статора 62 и цилиндричния ротор 64. В показаното изпълнение статорът 62 има цилиндрична форма. Роторите 68, и 682 включват по една нисковолтова намотка (не е показана) и се въртят с честота (ί,-ί2)/2, когато генераторът работи.
Честотата на тока на ротора ще бъде (f,+f2)/ 2, когато генераторът работи. Този генератор 60 сега е откачен от промишлената честота и може да бъде задействан с честотата, като един оптимизиращ параметър. Този ге- 5 нератор ще притежава по-висок кпд и подобра възможност за регулиране на мощността в сравнение с един конвенционален генератор.
На фиг. 7 е показано второ изпълне- 10 ние на генератора 70 съгласно изобретението. Генераторът 70 включва статор 72, свързан към променливотокова мрежа (не е показана), имаща честота f? и първичен цилиндричен ротор 74, свързан към турбина 76, 15 който се върти с честота fr Генераторът 70 също включва съставен ротор 78, който се върти в зависимост от честотите f, и f2. Статорът 72 и първият цилиндричен ротор 74, всеки включва поне една намотка (не е по- 20 казана). Намотката може да бъде от типовете, които бяха описани във връзка с фиг. 6. Роторът 78 включва първичен ротор 78, и вторичен ротор 782, които са електрически и механично свързани един към друг. Първични- 25 ят ротор 78! е кух и разположен концентрично около първия цилиндричен ротор 74, а вторият ротор 782 е цилиндричен и заобиколен от статор 72. Първичният и вторичният ротор 78, и 782от съставния ротор 78 включват 30 по една нисковолтова намотка и се въртят с честота (f,-f2)/2, когато генераторът е в действие. Статорът 72 е кух и разположен около вторичния ротор 782. Този генератор 70 работи по същия начин и има същите предим- 35 ства като генератора 60, показан на фиг. 6.
Показаните изпълнения показват само свързване към трифазни мрежи, но изобретението също е приложимо за свързване на трифазни мрежи, като единият статор има 40 еднофазно/двуфазно приложение. Изобретението може също да се използва за свързване на една трифазна мрежа и една еднофазна/двуфазна мрежа, където един статор, имащ трифазно приложение, е свързан посредством 45 съединение на Скот или друга симетрична връзка към една еднофазна/двуфазна мрежа. Изобретението също е приложимо за повече от два статора и роторни елементи за свързване на повече от две променливотокови 50 мрежи. Единственото условие е да се свързват две несинхронни мрежи.
Изобретението не се ограничава до описаните изпълнения. Очевидно е, че са възможни много различни модификации, влизащи в обхвата на претенциите.
Claims (41)
- Патентни претенции1. Асинхронен преобразувател за свързване на променливотокови мрежи с еднакви или различни честоти, като преобразувателят включва първичен статор, свързан към първична променливотокова мрежа, имаща първична честота f,, и вторичен статор, свързан към вторична променливотокова мрежа, имаща вторична честота f2, характеризиращ се с това, че преобразувателят също включва ротор, който се върти в зависимост от първичната и вторичната честота и поне един от статорите включва поне една намотка, като всяка намотка включва изолационна система, която се състои, от една страна, от поне два полупроводникови слоя, като всеки слой образува еквипотенциална повърхнина, и, от друга страна, между слоевете е поставена твърда изолация.
- 2. Асинхронен преобразувател съгласно претенция 1, характеризиращ се с това, че поне един от полупроводниковите слоеве има в обшия случай еднакъв коефициент на термично разширение с този на твърдата изолация.
- 3. Асинхронен преобразувател съгласно претенция 2, характеризиращ се с това, че потенциалът на вътрешния полупроводников слой е равен на потенциала на проводника.
- 4. Асинхронен преобразувател съгласно претенции 2 и 3, характеризиращ се с това, че външният от слоевете образува еквипотенциална повърхнина около проводника.
- 5. Асинхронен преобразувател съгласно претенция 4, характеризиращ се с това, че външният слой е свързан с определен потенциал.
- 6. Асинхронен преобразувател съгласно претенция 5, характеризиращ се с това, че този определен потенциал е земя.
- 7. Асинхронен преобразувател съгласно претенции от 1 до 6, характеризиращ се с това, че поне два от слоевете имат еднакви коефициенти на термично разширение.
- 8. Асинхронен преобразувател съгласно всяка от предходните претенции, характеризиращ се с това, че токоносещият проводник включва определен брой снопчета, като много малка част от тях не са изолирани едно спрямо друго.
- 9. Асинхронен преобразувател съгласно всяка от предходните претенции, характеризиращ се с това, че всеки от двата слоя и твърдата изолация са твърдо свързани към съседния слой или твърда изолация по цялата присъединителна повърхнина.
- 10. Асинхронен преобразувател за свързване на променливотокови мрежи с еднакви или различни честоти, като преобразувателят включва първичен статор, свързан с първична променливотокова мрежа, имаща първична честота fp и вторичен статор, свързан към вторична променливотокова мрежа, имаща вторична честота f2, характеризиращ се с това, че включва също съставен ротор, който се върти в зависимост от посочените първична и вторична честота f, и f2, и с това, че статорите включват поне една намотка, като всяка намотка включва един кабел, имащ поне един токоносещ проводник, при което всеки проводник включва набор снопчета, като около проводника е разположен вътрешен полупроводников слой, а около вътрешния полупроводников слой е разположен изолиращ слой от твърда изолация и около изолиращия слой е разположен външен полупроводников слой.
- 11. Асинхронен преобразувател съгласно претенция 10, характеризиращ се с това, че кабелът също включва метална броня и екран.
- 12. Асинхронен преобразувател съгласно претенция 11, характеризиращ се с това, че кабелът има диаметър от 20 до 250 mm и проводима площ в приблизителен диапазон от 80 до 3000 mm2.
- 13. Асинхронен преобразувател съгласно претенции от 1 до 12, характеризиращ се с това, че съставният ротор включва два електрически и механично свързани ротори, разположени концентрично по отношение на статорите.
- 14. Асинхронен преобразувател съгласно претенция 13, характеризиращ се с това, че включва спомагателно устройство, свързано към посочените ротори за тяхното стар тиране с подходяща скорост на въртене, преди свързване на преобразувателя.
- 15. Асинхронен преобразувател съгласно претенция 14, характеризиращ се с това, че всеки от роторите включва нисковолтова намотка и тези ротори се въртят с честота (f,-f2) /2, а токът в статора има честота ((+f2)/ 2, когато преобразувателят работи.
- 16. Асинхронен преобразувател съгласно претенции от 1 до 11, характеризиращ се с това, че съставният ротор включва само един ротор, разположен концентрично спрямо статорите.
- 17. Асинхронен преобразувател съгласно претенция 16, характеризиращ се с това, че роторът включва първична проводникова навивка и вторична проводникова навивка, като те са свързани една към друга и са разположени една срещу друга в ротора, като са разделени от два сектора, като всеки сектор има ъглова ширина а.
- 18. Асинхронен преобразувател съгласно претенция 17, характеризиращ се с това, че преобразувателят също включва спомагателно устройство, свързано към ротора, за стартиране на ротора с подходяща скорост на въртене, преди да се свърже преобразувателя, като роторът се върти с честота ίκ=(π - α). Δί/4π, където Δ ί=[ί\-ί2].
- 19. Асинхронен преобразувател за свързване на променливотокови мрежи с еднакви или различни честоти, като преобразувателят включва първичен статор, свързан към първична променливотокова мрежа, имаща първична честота f,, и вторичен статор, свързан към вторична променливотокова мрежа, имаща вторична честота f2, характеризиращ се с това, че преобразувателят също включва съставен ротор, който се върти в зависимост от първичната и вторичната честота ft и f2, и статорите включват поне по един токоносещ проводник и една изолираща система, която със своите термични и електрически качества позволява нивото на напрежението в асинхронния преобразувател да надвишава 36 kV.
- 20. Генератор с променлива скорост на въртене, който включва статор, свързан с променливотокова мрежа, имаща честота f2, първичен цилиндричен ротор с честота f, на въртене, свързан към турбина, характеризиращ се с това, че генераторът също включва със тавен ротор, който се върти в зависимост от честотите и f2, като статорът и първичният цилиндричен ротор включват поне една намотка, включваща поне един токоносещ проводник, като всяка намотка включва една изолационна система, която, от една страна, включва поне два полупроводникови слоя, като всеки слой образува една еквипотенциална повърхнина, и, от друга страна, между слоевете е поставена твърда изолация.
- 21. Генератор съгласно претенция 20, характеризиращ се с това, че поне един от полупроводниковите слоеве има еднакъв коефициент на термично разширение с твърдата изолация.
- 22. Генератор съгласно претенция 21, характеризиращ се с това, че потенциалът на вътрешния слой е равен на потенциала на проводника.
- 23. Генератор съгласно претенции 21 и 22, характеризиращ се с това, че външният слой е направен да образува еквипотенциална повърхнина около проводника.
- 24. Генератор съгласно претенция 23, характеризиращ се с това, че външният слой е свързан с определен потенциал.
- 25. Генератор съгласно претенция 24, характеризиращ се с това, че определеният потенциал е земя.
- 26. Генератор съгласно претенции от 20 до 25, характеризиращ се с това, че поне два от слоевете имат еднакви коефициенти на термично разширение.
- 27. Генератор съгласно претенции от 20 до 26, характеризиращ се с това, че токоносещият проводник включва набор от снопчета, като много малка част от тях не са изолирани едно спрямо друго.
- 28. Генератор съгласно претенции от 20 до 27, характеризиращ се с това, че всеки от двата слоя и твърдата изолация са твърдо свързани към съседния слой или твърда изолация по цялата свързваща повърхнина.
- 29. Генератор с променлива скорост на въртене, който включва статор, свързан с променливотокова мрежа, имаща честота f2, първичен цилиндричен ротор, свързан към турбина, който се върти с честота f,, характеризиращ се с това, че генераторът също включва съставен ротор, който се върти в зависимост от честотите f( и f2, като статорът и първичният цилиндричен ротор включват поне една намотка, състояща се от кабел, имащ поне един токоносещ проводник, като всеки проводник включва набор снопчета, при което около кабела е разположен вътрешен полупроводников слой, а около вътрешния полупроводников слой е разположен изолиращ слой от твърда изолация и около изолиращия слой е разположен външен полупроводников слой.
- 30. Генератор съгласно претенция 29, характеризиращ се с това, че кабелът също включва метална броня и екран.
- 31. Генератор съгласно претенция 30, характеризиращ се с това, че кабелът има диаметър в приблизителен диапазон от 20 до 250 mm и проводима площ в приблизителен диапазон от 80 до 3000 mm2.
- 32. Генератор съгласно претенции от 20 до 31, характеризиращ се с това, че съставният ротор включва два електрически и механични свързани ротора, които са кухи и са разположени концентрично около статора и цилиндричния ротор.
- 33. Генератор съгласно претенция 32, характеризиращ се с това, че роторите на съставния ротор включват нисковолтова намотка и че съставният ротор се върти с честота (f,-f2)/2, когато генераторът работи.
- 34. Генератор съгласно претенция 33, характеризиращ се с това, че статорът има цилиндрична форма.
- 35. Генератор съгласно претенции от 20 до 31, характеризиращ се с това, че съставният ротор включва първичен ротор и вторичен ротор, които са електрически и механично свързани, като първичният ротор е кух и разположен концентрично около първичния цилиндричен ротор, а вторичния ротор е цилиндричен.
- 36. Генератор съгласно претенция 35, характеризиращ се с това, че първичният и вторичният ротор от съставния ротор включват по една нисковолтова намотка, а първичният и вторичният ротор се въртят с честота (f,-f2)/2, когато генераторът работи.
- 37. Генератор съгласно претенция 36, характеризиращ се с това, че статорът е кух и разположен около вторичния ротор.
- 38. Използване на един асинхронен преобразувател в съответствие с всяка от претенциите от 1 до 19 за свързване на несинхронни трифазни мрежи с еднакви но минални честоти.
- 39. Използване на един асинхронен преобразувател в съответствие с всяка от претенциите от 1 до 19 за свързване на трифазни мрежи с различни честоти. 5
- 40. Използване на един асинхронен преобразувател в съответствие с всяка от претенциите от 1 до 19 като последователно компенсиращо звено в променливотоково далекопренасяне.
- 41. Използване на един асинхронен преобразувател в съответствие с всяка от претенциите от 1 до 19 за реактивно компенсиране на мощност.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9602079A SE9602079D0 (sv) | 1996-05-29 | 1996-05-29 | Roterande elektriska maskiner med magnetkrets för hög spänning och ett förfarande för tillverkning av densamma |
| PCT/SE1997/000890 WO1997045912A1 (en) | 1996-05-29 | 1997-05-27 | A rotating asynchronous converter and a generator device |
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| Publication Number | Publication Date |
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| BG102926A BG102926A (bg) | 1999-06-30 |
| BG63444B1 true BG63444B1 (bg) | 2002-01-31 |
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| US12480449B2 (en) | 2022-08-22 | 2025-11-25 | General Electric Company | Propulsion system including an electric machine for starting a gas turbine engine |
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| DE2656389C3 (de) | 1976-12-13 | 1979-11-29 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Synchroner Linearmotor |
| FR2376542A1 (fr) | 1976-12-30 | 1978-07-28 | Aroshidze Jury | Stator de machine electrique |
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| JPS53120117A (en) | 1977-03-30 | 1978-10-20 | Hitachi Ltd | Excitation control system for generator |
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| GB2045626B (en) | 1979-03-22 | 1983-05-25 | Oriental Metal Seizo Co | Process and apparatus for the distillation of water |
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| FR2481531A1 (fr) | 1980-04-23 | 1981-10-30 | Cables De Lyon Geoffroy Delore | Procede d'epissurage et epissure pour cable coaxial a isolation massive |
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| SE512059C2 (sv) | 1997-02-03 | 2000-01-17 | Abb Ab | Förfarande för framställning av gas- eller vätskekyld transformator/reaktor samt sådan transformator/reaktor |
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| SE9704423D0 (sv) | 1997-02-03 | 1997-11-28 | Asea Brown Boveri | Roterande elektrisk maskin med spolstöd |
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| SE512060C2 (sv) | 1997-02-03 | 2000-01-17 | Abb Ab | Lindning, förfarande för framställning av en sådan samt krafttransformator eller reaktor |
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| SE9704433D0 (sv) | 1997-02-03 | 1997-11-28 | Asea Brown Boveri | Anordning vid statorn i en roterande elektrisk maskin |
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| SE512952C2 (sv) | 1997-09-30 | 2000-06-12 | Abb Ab | Förfarande och anordning vid jordning hos en roterande elektrisk maskin, samt roterande elektrisk maskin |
| SE9703560D0 (sv) | 1997-09-30 | 1997-09-30 | Asea Brown Boveri | Induktionsstyrd spänningsreglering |
| SE511363C2 (sv) | 1997-09-30 | 1999-09-20 | Abb Ab | Torr krafttransformator/reaktor |
| SE513385C2 (sv) | 1997-09-30 | 2000-09-04 | Abb Ab | Roterande elektrisk maskin där statorlindningen utgörs av en högspänningskabel |
| SE521013C2 (sv) | 1997-09-30 | 2003-09-23 | Abb Ab | Roterande elektrisk maskin försedd med lindning utgjord av högspänningskabel |
| SE511961C2 (sv) | 1997-09-30 | 1999-12-20 | Abb Ab | Induktionsstyrd spänningsregulator, reglerlindning samt förfarande för spänningsstyrning |
| SE511136C2 (sv) | 1997-09-30 | 1999-08-09 | Asea Brown Boveri | Steglös induktionsstyrd spänningsregulator, reglerlindning för en sådan samt förfarande för styrning |
| SE513083C2 (sv) | 1997-09-30 | 2000-07-03 | Abb Ab | Synkronkompensatoranläggning jämte användning av dylik samt förfarande för faskompensation i ett högspänt kraftfält |
| SE511372C2 (sv) | 1997-09-30 | 1999-09-20 | Abb Ab | Förfarande och anordning för reglering av transformator/ reaktor samt transformator/reaktor |
| SE512721C2 (sv) | 1997-09-30 | 2000-05-02 | Abb Ab | Roterande elektrisk maskin, maskin innefattande minst en roterande elektrisk huvudmaskin och elkraftanläggning innefattande en roterande elektrisk maskin jämte förfarande för magnetisering av en roterande elektrisk maskin |
| SE513057C2 (sv) | 1997-09-30 | 2000-06-26 | Abb Ab | Roterande elektrisk maskin jämte förfarande för värmeisolering av en roterande elektrisk maskin |
| SE511361C2 (sv) | 1997-09-30 | 1999-09-20 | Abb Ab | Krafttransformator/reaktor samt förfarande för att anpassa en högspänningskabel |
| SE512410C2 (sv) | 1997-09-30 | 2000-03-13 | Abb Ab | Krafttransformator/reaktor |
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| SE512822C2 (sv) | 1997-09-30 | 2000-05-22 | Abb Ab | Elektrisk anläggning innefattande minst en roterande elektrisk maskin och användning av en roterande elektrisk maskin i en elektrisk anläggning |
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| SE512717C2 (sv) | 1997-10-13 | 2000-05-02 | Abb Ab | Stator för en roterande elektrisk maskin, förfarande vid tillverkning av en stator jämte en roterande elektrisk maskin innefattande en stator |
| SE512915C2 (sv) | 1997-10-13 | 2000-06-05 | Abb Ab | Förfarande vid tillverkning av en stator jämte en stator och en roterande elektrisk maskin innefattande en stator samt en anordning och dess användning för förspänning av spännorgan i en stator |
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| SE512419C2 (sv) | 1997-11-27 | 2000-03-13 | Abb Ab | Transformator/reaktor samt förfarande vid tillverkning av en sådan |
| SE513465C2 (sv) | 1997-11-27 | 2000-09-18 | Abb Ab | Förfarande för varvtalsreglering av roterande elektrisk maskin samt system för utförande av förfarandet |
| EE200000316A (et) | 1997-11-28 | 2001-10-15 | Abb Ab | Pöörlev kõrgepinge elektrimasin |
| GB2331871A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Insulated electrical conductor for high voltage use |
| GB2331858A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | A wind power plant |
| GB2331854A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Transformer |
| GB2331860A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | High voltage rotating electric machine |
| SE9704461L (sv) | 1997-11-28 | 1999-05-29 | Asea Brown Boveri | Förfarande vid tillverkning av stator till roterande elektrisk maskin |
| HUP0101186A3 (en) | 1997-11-28 | 2002-03-28 | Abb Ab | Method and device for controlling the magnetic flux with an auxiliary winding in a rotaing high voltage electric alternating current machine |
| GB2331870A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Connection to outer semiconductor of HV cable |
| GB2331852A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Transformer winding arrangements |
| GB2331856B (en) | 1997-11-28 | 2002-02-27 | Asea Brown Boveri | Electricity supply system |
| GB2331872A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Insulated electrical conductor and contacting method |
| SE9704452D0 (sv) | 1997-11-28 | 1997-11-28 | Asea Brown Boveri | Förfarande för reparering av ett lindningssystem |
| GB2331868A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Cooled cable joints |
| GB2331878A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Power flow control in AC systems using directly connected rotary power converters |
| GB2331869A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Electrical contact of semi-conductive layer of HV cable |
| GB2331851A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Magnetic energy storage |
| SE512402C2 (sv) | 1997-11-28 | 2000-03-13 | Abb Ab | Reaktor |
| GB2331867A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Power cable termination |
| GB2331861A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Traction motor winding having a conductor with semi-conductor insulation layers |
| GB2331853A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Transformer |
| GB2332557A (en) | 1997-11-28 | 1999-06-23 | Asea Brown Boveri | Electrical power conducting means |
| GB2331835A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Insulated conductor for high-voltage machine windings |
| GB2331857A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Magnetic core assemblies |
| SE520775C3 (sv) | 1997-11-28 | 2003-10-01 | Abb Ab | Ställverksstation |
| GB2332559A (en) | 1997-11-28 | 1999-06-23 | Asea Brown Boveri | An insulated conductor |
| GB2331855A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Transformer with regulating means |
| US6146688A (en) | 1997-12-23 | 2000-11-14 | Morgan; Harry C. | Method of creating a biostatic agent using interpenetrating network polymers |
| US6456021B1 (en) * | 2000-06-30 | 2002-09-24 | General Electric Company | Rotating variable frequency transformer with high voltage cables |
-
1996
- 1996-05-29 SE SE9602079A patent/SE9602079D0/xx unknown
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1997
- 1997-05-27 TR TR1998/02472T patent/TR199802472T2/xx unknown
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- 1997-05-27 WO PCT/SE1997/000885 patent/WO1997045923A1/en not_active Ceased
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1998
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- 1998-11-20 IS IS4901A patent/IS4901A/is unknown
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2003
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2005
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