GB122431A - Improvements in or relating to Electrical Transformers. - Google Patents

Improvements in or relating to Electrical Transformers.

Info

Publication number
GB122431A
GB122431A GB1583717A GB1583717A GB122431A GB 122431 A GB122431 A GB 122431A GB 1583717 A GB1583717 A GB 1583717A GB 1583717 A GB1583717 A GB 1583717A GB 122431 A GB122431 A GB 122431A
Authority
GB
United Kingdom
Prior art keywords
phase
transformers
transformer
secondaries
current
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
GB1583717A
Inventor
Frederick Edmund Berry
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
Priority to GB1583717A priority Critical patent/GB122431A/en
Publication of GB122431A publication Critical patent/GB122431A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01F30/14—Two-phase, three-phase or polyphase transformers for changing the number of phases
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/14—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion between circuits of different phase number

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

122,431. Berry, F. E. Oct. 30, 1917. Phase, changing; polyphase transformers.-A transformer for changing three-phase to four-phase current has a transformer A, B, C for each of the three phases, the primaries a, b being of the same size and the primary c smaller. Two secondary windings are used with each of the primaries a, band one secondary with the primary c. One of the ends of each of the four secondaries on the transformers A, B is connected to the remaining secondary as shown, the four-phase current being taken from the remaining ends of the four secondaries, the mid point 6 of the secondary on the transformer C being the neutral point. As applied to an electric furnace, the point 6 is connected to a hearth electrode, but with balanced loads between the phases no current will flow in the hearth electrode. In an arrangement for converting three-phase to two-phase, the secondary of the transformer C is also divided into two, the four ends being connected to four of the ends of the secondaries on the transformers A, B. The remaining ends of the latter secondaries furnish the two-phase supply. The transformers may be used for converting two or four-phase current into three-phase. Instead of three single-phase transformers, a three-phase transformer may be used.
GB1583717A 1917-10-30 1917-10-30 Improvements in or relating to Electrical Transformers. Expired GB122431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1583717A GB122431A (en) 1917-10-30 1917-10-30 Improvements in or relating to Electrical Transformers.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1583717A GB122431A (en) 1917-10-30 1917-10-30 Improvements in or relating to Electrical Transformers.

Publications (1)

Publication Number Publication Date
GB122431A true GB122431A (en) 1919-01-30

Family

ID=32346951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1583717A Expired GB122431A (en) 1917-10-30 1917-10-30 Improvements in or relating to Electrical Transformers.

Country Status (1)

Country Link
GB (1) GB122431A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107294115A (en) * 2017-07-24 2017-10-24 西南交通大学 A kind of four phase five-wire system low voltage distribution transformers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107294115A (en) * 2017-07-24 2017-10-24 西南交通大学 A kind of four phase five-wire system low voltage distribution transformers
CN107294115B (en) * 2017-07-24 2023-04-07 西南交通大学 Four-phase five-wire system low-voltage distribution transformer

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