GB1325938A - Electric transformers - Google Patents

Electric transformers

Info

Publication number
GB1325938A
GB1325938A GB1325938DA GB1325938A GB 1325938 A GB1325938 A GB 1325938A GB 1325938D A GB1325938D A GB 1325938DA GB 1325938 A GB1325938 A GB 1325938A
Authority
GB
United Kingdom
Prior art keywords
primary winding
june
star
delta
laminations
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.)
Expired
Application number
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Publication of GB1325938A publication Critical patent/GB1325938A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer
    • 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
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

1325938 Transformers FERRANTI Ltd 12 June 1972 [19 June 1971] 28845/71 Heading HIT [Also in Division H2] In a polyphase transformer supplying a low ripple D.C. system and having a three phase (star or delta) primary winding 12A, 12B, 12C, a star connected secondary 16A, 16B, 16C and a delta connected secondary 13A, 13B, and 13C. The voltage output of one of the secondaries is balanced with that of the other secondary by means for affecting the magnetic coupling between each primary winding and one only of its two associated secondary windings. This means may comprise magnetic members (20A, 20B, 20C, Fig. 2, not shown) disposed between each primary winding 12A, 12B, 12C and a respective secondary winding, 16A, 16B or 16C. These magnetic shunts may be of ferrite or of grainoriented steel laminations. They may be movable or fixed in which case the number of laminations necessary is determined by tests prior to manufacture.
GB1325938D 1971-06-19 1971-06-19 Electric transformers Expired GB1325938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2884571 1971-06-19

Publications (1)

Publication Number Publication Date
GB1325938A true GB1325938A (en) 1973-08-08

Family

ID=10282087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1325938D Expired GB1325938A (en) 1971-06-19 1971-06-19 Electric transformers

Country Status (4)

Country Link
DE (1) DE2227772B2 (en)
FR (1) FR2142993B1 (en)
GB (1) GB1325938A (en)
IT (1) IT958357B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982004495A1 (en) * 1981-06-17 1982-12-23 Masami Sakurai Star-connection-to-2-delta-connection conversion transformer
WO1983001340A1 (en) * 1981-10-12 1983-04-14 Masami Sakurai Transformer for converting 3-phase power into dc power
FR3033930A1 (en) * 2015-03-21 2016-09-23 Emerson Network Power Ind Systems THREE PHASE TRANSFORMER FOR DODECAPHASE RECTIFIER

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683527A (en) * 1986-08-13 1987-07-28 Westinghouse Electric Corp. AC/DC or DC/AC converter system with outboard commutation inductors
FR3074378A1 (en) * 2017-11-30 2019-05-31 Vertiv Industrial Systems Sas THREE-PHASE TRANSFORMER FOR DODECAPHASE RECTIFIER WITH AUXILIARY CORRECTION OF POWER FACTOR CORRECTION

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982004495A1 (en) * 1981-06-17 1982-12-23 Masami Sakurai Star-connection-to-2-delta-connection conversion transformer
WO1983001340A1 (en) * 1981-10-12 1983-04-14 Masami Sakurai Transformer for converting 3-phase power into dc power
FR3033930A1 (en) * 2015-03-21 2016-09-23 Emerson Network Power Ind Systems THREE PHASE TRANSFORMER FOR DODECAPHASE RECTIFIER
WO2016151225A1 (en) * 2015-03-21 2016-09-29 Emerson Network Power Industrial Systems Three-phase transformer for twelve-phase rectifier

Also Published As

Publication number Publication date
FR2142993B1 (en) 1977-12-09
DE2227772B2 (en) 1975-10-09
DE2227772A1 (en) 1972-12-21
FR2142993A1 (en) 1973-02-02
IT958357B (en) 1973-10-20

Similar Documents

Publication Publication Date Title
GB1341050A (en) Variable induction device
GB1039500A (en) Electromagnetic device
GB1045402A (en) Core type transformers
GB1424982A (en) Three-phase transformer
GB1325938A (en) Electric transformers
GB1283238A (en) Transformers
GB1114013A (en) Improvements in or relating to transformers
GB1315185A (en) Trigger circuit for controlled rectifiers
GB1252165A (en)
GB1028925A (en) Transformer arrangement in or for use in current supply apparatus
GB981517A (en) An improved balanced phase shift transformer
GB1407594A (en) High voltage converter apparatus
GB1134529A (en) Transformer winding and shielding structure
GB1010579A (en) Arc welding apparatus
GB1301055A (en) Ac/dc power supply
GB1271635A (en) Improvements relating to transformers
GB617706A (en) Static transformer for arc welding
GB1080638A (en) Single-phase transformer for electric arc welding
GB1107704A (en) Improvements in and relating to electrical generator and transformer arrangements
GB971681A (en) Single-phase welding transformers
GB1314036A (en) Voltage regulators
GB1074702A (en) Improvements relating to controlled transformers
GB1336158A (en) Polyphase transformer apparatus
GB1072974A (en) Improvements in or relating to electric circuit arrangements including inductive elements
GB1336966A (en) Transformer for electric arc welding

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee