GB470351A - Improvements in or relating to apparatus for rectifying alternating currents - Google Patents

Improvements in or relating to apparatus for rectifying alternating currents

Info

Publication number
GB470351A
GB470351A GB464336A GB464336A GB470351A GB 470351 A GB470351 A GB 470351A GB 464336 A GB464336 A GB 464336A GB 464336 A GB464336 A GB 464336A GB 470351 A GB470351 A GB 470351A
Authority
GB
United Kingdom
Prior art keywords
circuit
frequency
transformer
valve
resistance
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
GB464336A
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB464336A priority Critical patent/GB470351A/en
Publication of GB470351A publication Critical patent/GB470351A/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
    • H02M7/066—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 particular circuits having a special characteristic

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Generation Of Surge Voltage And Current (AREA)

Abstract

470,351. Automatic control systems. GENERAL ELECTRIC CO., Ltd., and DUNHAM, C. R. Feb. 15, 1936, Nos. 4643 and 7524. [Class 38 (iv)] - Frequency; e.m.f.-Comprises an arrangement in which a D.C. circuit is supplied from an A.C. circuit through a transformer operating at saturation and a full wave rectifier. The material used for the core of the transformer is of the kind which saturates at a very low value of magnetizing force such as, e.g. that known under the Registered Trade Mark " Mumetal." This arrangement enables a constant voltage D.C. to be obtained even though the A.C. voltage varies, and also enables a D.C. voltage which varies with frequency on the A.C. side to be obtained. The second effect is employed in an arrangement shown in the drawing accompanying the second Provisional Specification, for maintaining the speed of a motor generator set constant. A motor 2 fed from a D.C. circuit 24, 25 drives an alternator 1 which supplies an A.C. circuit 14, 15. A saturated transformer-rectifier circuit 3 is connected to 14, 15, and gives a voltage across a resistance 34 proportional to the frequency of the alternator. A further saturated-transformer-rectifier circuit 4 is connected to an A.C. source 47, 48 of constant frequency and gives across a resistance 44 a constant voltage. The resistances 34, 44 are connected in series-opposition in the grid circuit of a valve 5 which controls the operation of a gas-discharge valve 6 connected across part of the resistance 23 in the field circuit of the motor 2. Variation of the frequency will thus alter the bias on the grid of valve 5 and through the valve C alter the field of the motor 2 to effect speed correction. The operating frequency can be adjusted by means of a tapping 49 on resistance 44. Commutation of the valve 6 is effected by means of the secondary 63 of a transformer supplied from an A.C. source. Specification 441,704 is referred to. Reference has been directed by the Comptroller to Specifications 315,844, 336,716, [both in Class 38 (iv)], and 389,811.
GB464336A 1936-02-15 1936-02-15 Improvements in or relating to apparatus for rectifying alternating currents Expired GB470351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB464336A GB470351A (en) 1936-02-15 1936-02-15 Improvements in or relating to apparatus for rectifying alternating currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB464336A GB470351A (en) 1936-02-15 1936-02-15 Improvements in or relating to apparatus for rectifying alternating currents

Publications (1)

Publication Number Publication Date
GB470351A true GB470351A (en) 1937-08-13

Family

ID=9781063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB464336A Expired GB470351A (en) 1936-02-15 1936-02-15 Improvements in or relating to apparatus for rectifying alternating currents

Country Status (1)

Country Link
GB (1) GB470351A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2804588A (en) * 1955-10-03 1957-08-27 Sola Electric Co Power supply apparatus
US2978628A (en) * 1955-07-27 1961-04-04 Ite Circuit Breaker Ltd Constant d.-c. voltage output circuit
US3099784A (en) * 1959-12-31 1963-07-30 Westinghouse Electric Corp Frequency multiplier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2978628A (en) * 1955-07-27 1961-04-04 Ite Circuit Breaker Ltd Constant d.-c. voltage output circuit
US2804588A (en) * 1955-10-03 1957-08-27 Sola Electric Co Power supply apparatus
US3099784A (en) * 1959-12-31 1963-07-30 Westinghouse Electric Corp Frequency multiplier

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