GB871573A - Improvements in or relating to adjustable electrical supply circuits - Google Patents

Improvements in or relating to adjustable electrical supply circuits

Info

Publication number
GB871573A
GB871573A GB3917057A GB3917057A GB871573A GB 871573 A GB871573 A GB 871573A GB 3917057 A GB3917057 A GB 3917057A GB 3917057 A GB3917057 A GB 3917057A GB 871573 A GB871573 A GB 871573A
Authority
GB
United Kingdom
Prior art keywords
windings
inductor
switches
load
steps
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
GB3917057A
Inventor
Walter Norman Jenkins
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.)
British Iron and Steel Research Association BISRA
Original Assignee
British Iron and Steel Research Association BISRA
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 British Iron and Steel Research Association BISRA filed Critical British Iron and Steel Research Association BISRA
Priority to GB3917057A priority Critical patent/GB871573A/en
Publication of GB871573A publication Critical patent/GB871573A/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

Landscapes

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

Abstract

871,573. Transformers. BRITISH IRON & STEEL RESEARCH ASSOCIATION. March 17, 1959 [Dec. 17, 1957], No. 39170/57. Class 38 (2). [Also in Group XXXVII] A voltage varying in steps is obtained from a transformer having a number of secondary windings 12, 13, 14 (Fig. 1) giving respectively voltages of N, 3N and 9N; which are connected singly, or in series aiding, or series opposing relationship by switches 16 . . . 19, 16a . . . 19a, 176 and 18b arranged as shown so as to provide a voltage, varying by steps of N from 0 to 13N, to the rectifier bridge 20 supplying motor 21. To minimize the magnitude and order of the harmonics developed a six-phase transformer may be employed having two or more secondary windings per phase, the smaller windings being connected across bridge circuits of switches as shown in Fig. 2. The windings are arranged in two star-connected systems interconnected by an inductor 41 and are connected to line 40 by rectifiers 38. The D.C. motor or other load is connected between line 40 and a centre tapping on inductor 41 through a contactor bridge circuit 43 by which the supply to it can be reversed. A three-phase system may be used and an A.C. load such as an electric furnace may be supplied.
GB3917057A 1957-12-17 1957-12-17 Improvements in or relating to adjustable electrical supply circuits Expired GB871573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3917057A GB871573A (en) 1957-12-17 1957-12-17 Improvements in or relating to adjustable electrical supply circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3917057A GB871573A (en) 1957-12-17 1957-12-17 Improvements in or relating to adjustable electrical supply circuits

Publications (1)

Publication Number Publication Date
GB871573A true GB871573A (en) 1961-06-28

Family

ID=10408055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3917057A Expired GB871573A (en) 1957-12-17 1957-12-17 Improvements in or relating to adjustable electrical supply circuits

Country Status (1)

Country Link
GB (1) GB871573A (en)

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