PT85439A - CIRCUIT FOR LARGE POWER TRANSFORMERS - Google Patents

CIRCUIT FOR LARGE POWER TRANSFORMERS

Info

Publication number
PT85439A
PT85439A PT85439A PT8543987A PT85439A PT 85439 A PT85439 A PT 85439A PT 85439 A PT85439 A PT 85439A PT 8543987 A PT8543987 A PT 8543987A PT 85439 A PT85439 A PT 85439A
Authority
PT
Portugal
Prior art keywords
winding
stage
tapped
tapped winding
voltage
Prior art date
Application number
PT85439A
Other languages
Portuguese (pt)
Other versions
PT85439B (en
Inventor
Walter Muller
Werner Stein
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of PT85439A publication Critical patent/PT85439A/en
Publication of PT85439B publication Critical patent/PT85439B/en

Links

Classifications

    • 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
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • 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
    • H01F27/343—Preventing or reducing surge voltages; oscillations

Abstract

High power transformers normally contain a low-voltage winding (12), a high-voltage main winding (13) and a tapped winding (14). If the tapped winding is operated in a subtractive and additive manner, when the transformer is excited with an oscillating switching voltage at the resonant frequency of the tapped winding (14), particularly when it is connected subtractively, high voltage amplitudes with respect to earth can occur along the tapped winding (14) at the end of the main winding (13). To reduce and damp-out such resonant frequency oscillations, in the case of known arrangements either each stage or the complete tapped winding (14) was connected in parallel with an R-C element (19, 20). According to the invention, it is now intended that only a single stage of the multi-stage tapped winding (14) is connected in parallel with an R-C element (19, 20), which R-C element also reduces the resonant amplitudes occurring in the other stages because of the transformer coupling between this stage and the other stages. The use of the circuit arrangement according to the invention is expedient in the case of large transformers. This is particularly true in all cases in which a multi- stage tapped winding (14) is provided connected additively and subtractively with respect to the high voltage main winding (13). <IMAGE>
PT85439A 1986-07-30 1987-07-29 CIRCUIT FOR LARGE POWER TRANSFORMERS PT85439B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3625845 1986-07-30

Publications (2)

Publication Number Publication Date
PT85439A true PT85439A (en) 1988-07-29
PT85439B PT85439B (en) 1993-09-30

Family

ID=6306352

Family Applications (1)

Application Number Title Priority Date Filing Date
PT85439A PT85439B (en) 1986-07-30 1987-07-29 CIRCUIT FOR LARGE POWER TRANSFORMERS

Country Status (7)

Country Link
EP (1) EP0257291B1 (en)
AT (1) ATE61886T1 (en)
BR (1) BR8703907A (en)
DE (1) DE3768736D1 (en)
ES (1) ES2020972B3 (en)
GR (1) GR3001869T3 (en)
PT (1) PT85439B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU716573B2 (en) * 1995-06-28 2000-03-02 Swichtec Power Systems Limited Resonance tapped transformer
ATE210882T1 (en) † 1995-09-14 2001-12-15 Bombardier Transp Gmbh VEHICLE TRANSFORMER
JPH11508414A (en) * 1996-04-16 1999-07-21 アレクサンドロビチ マルコフ，ゲンナディ Transformer
EP2549645A1 (en) * 2011-07-21 2013-01-23 Telefonaktiebolaget LM Ericsson (publ) Transformer filter arrangement
CN102945735A (en) * 2012-11-06 2013-02-27 保定天威集团有限公司 Pre-magnetizing transformer with voltage regulator and manufacture method thereof
BR102021020237A2 (en) * 2021-10-08 2023-04-18 Reson Energy Ltda ELECTRICAL TRANSFORMER WITH RESONANT PRIMARY AND INDUCTIVE SECONDARY AND MANUFACTURING METHOD

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1658664A (en) * 1927-07-06 1928-02-07 Gen Electric Variable-ratio transformer
US1809895A (en) * 1928-10-08 1931-06-16 Frazer W Gay Protective system for transformers
CH275245A (en) * 1948-11-11 1951-05-15 Ceskoslovenske Z Tezkeho Stroj Vibration-free transformer.
FR2007394A1 (en) * 1968-04-05 1970-01-09 Licentia Gmbh
US3644786A (en) * 1970-08-26 1972-02-22 Westinghouse Electric Corp Electrical windings
US3668511A (en) * 1971-02-16 1972-06-06 Mc Graw Edison Co Self energizing tap switch for electronic tap changer
DE2117422A1 (en) * 1971-04-08 1972-10-12 Schorch Gmbh Control transformer with surge voltage protected step winding
DE3338149A1 (en) * 1983-10-20 1985-05-02 Transformatoren Union Ag, 7000 Stuttgart CIRCUIT ARRANGEMENT FOR LARGE POWER TRANSFORMERS

Also Published As

Publication number Publication date
PT85439B (en) 1993-09-30
ES2020972B3 (en) 1991-10-16
ATE61886T1 (en) 1991-04-15
EP0257291B1 (en) 1991-03-20
DE3768736D1 (en) 1991-04-25
BR8703907A (en) 1988-04-05
GR3001869T3 (en) 1992-11-23
EP0257291A1 (en) 1988-03-02

Similar Documents

Publication Publication Date Title
DE69505805D1 (en) CONTROL SYSTEM FOR OPTICAL CELL
ATE88850T1 (en) SELF-ADJUSTING NON-LOAD PROTECTED BALLAST SYSTEM.
DE3570162D1 (en) Static power frequency converter
PT85439B (en) CIRCUIT FOR LARGE POWER TRANSFORMERS
KR900005698A (en) Nonlinear Resonant Switch and Converter
ATE129601T1 (en) DC VOLTAGE CONVERTER.
KR840002598A (en) Circuit for converting DC input voltage to DC output voltage
KR880008501A (en) Power supply
KR910016226A (en) Circuit device with DC-AC converter
ATE156325T1 (en) RESONANCE INVERTER
ATE125400T1 (en) BACKFEED CIRCUIT FOR TWO-POINT AND THREE-POINT INVERTERS AND METHOD FOR BACKFEEDING THE CIRCUIT ENERGY.
JPS56501308A (en)
SU783776A2 (en) Ferroresonance stabilizer
SU892580A2 (en) Device for d.c. supply of load
SU1476575A2 (en) Static ferromagnetic frequency multiplier
KR100359072B1 (en) Resonance circuit of transformer having preventive function of over current
ES2065427T3 (en) CONTINUOUS-CONTINUOUS CONVERTER, WITH CUTTING.
JPS56168240A (en) Constant-voltage regulated power supply
SU936311A2 (en) Two-cycle dc voltage converter
KR890007580A (en) Integrated power supply circuit between SMPS circuit and FBT circuit
GB567570A (en) Improvements in electric metal vapour converters having interphase transformers
FI850084L (en) FREKVENSSTABILISERAT AUTOMATISKT FOERSTAERKNINGSREGLERAT BALLASTSYSTEM.
ATE169781T1 (en) ELECTRONIC TRANSFORMER
JPS6127993B2 (en)
ATE73289T1 (en) ELECTRONIC BALLAST WITH GAIN CONTROL.

Legal Events

Date Code Title Description
FG3A Patent granted, date of granting

Effective date: 19930303

MM3A Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 19950930