GB1357536A - Alternating current regulators - Google Patents

Alternating current regulators

Info

Publication number
GB1357536A
GB1357536A GB4857170A GB4857170A GB1357536A GB 1357536 A GB1357536 A GB 1357536A GB 4857170 A GB4857170 A GB 4857170A GB 4857170 A GB4857170 A GB 4857170A GB 1357536 A GB1357536 A GB 1357536A
Authority
GB
United Kingdom
Prior art keywords
load
bridge
chopper
charge
thyristors
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
GB4857170A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co Ltd
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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB4857170A priority Critical patent/GB1357536A/en
Priority to AU34313/71A priority patent/AU453829B2/en
Publication of GB1357536A publication Critical patent/GB1357536A/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
    • 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
    • H02M5/22—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 discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—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 discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/27—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 discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means for conversion of frequency
    • H02M5/271—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 discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means for conversion of frequency from a three phase input voltage
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/24—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using bucking or boosting transformers as final control devices
    • G05F1/26—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using bucking or boosting transformers as final control devices combined with discharge tubes or semiconductor devices
    • G05F1/30—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using bucking or boosting transformers as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Rectifiers (AREA)

Abstract

1357536 Converting; control systems for consuming apparatus WESTINGHOUSE BRAKE & SIGNAL CO Ltd 23 July 1971 [13 Oct 1970] 48571/70 Headings H2F and H2H A circuit for regulating the alternating current in a load 1 comprises a chopper 5 operable at a frequency higher than that of the supply 3, 4 and being connected in a bridge circuit D1 ... D4 so as to be operable on both half cycles, the chopper 5 being shunted by the series arrangement of a diode D5 and capacitor C1 so as to pass reactive currents, the charge on C1 being regulated by a rectifying system CSR1 ... CSR4 so as to determine the instantaneous value of the voltage across load 1 when the chopper 5 is conductive. As shown in Fig. 1, the chopping is achieved by thyristor CSR6 which is periodically turned off by a commutating circuit C2, D7 and L2 under control of commutating thyristor OSR5. The effective voltage across load 1 is regulated by control of the mark/space ratio of the trigger pulses fed to thyristors CSR5, CSR6. Capacitor C1 accumulates charge during operation, this charge being maintained constant by a bridge of four thyristors CSR1 ... CSR4 which return surplus energy via transformer T1 to the source 3, 4. In Figs. 3, 4 (not shown) the diode bridge D1 ... D4 is supplied from the secondary of a transformer, the primary being connected between terminal 3 and the upper terminal of load 1. In Fig. 4 the load 1 is fed from the secondary of a transformer, balanced primary windings of which being connected between opposite terminals of bridge D1 ... D4 and the supply terminals 3, 4. In Fig. 6a, the supply to a threephase rectifier 6 is controlled according to the invention by a chopper 5 having the charge on capacitor C1 maintained by means of a threephase bridge of thyristors.
GB4857170A 1970-10-13 1970-10-13 Alternating current regulators Expired GB1357536A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4857170A GB1357536A (en) 1970-10-13 1970-10-13 Alternating current regulators
AU34313/71A AU453829B2 (en) 1970-10-13 1971-10-07 Variable voltage ac. supplies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4857170A GB1357536A (en) 1970-10-13 1970-10-13 Alternating current regulators

Publications (1)

Publication Number Publication Date
GB1357536A true GB1357536A (en) 1974-06-26

Family

ID=10449085

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4857170A Expired GB1357536A (en) 1970-10-13 1970-10-13 Alternating current regulators

Country Status (1)

Country Link
GB (1) GB1357536A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267788A (en) * 1992-06-04 1993-12-15 Strand Lighting Ltd Dimmer circuit
CN107404235A (en) * 2017-09-07 2017-11-28 北京英博电气股份有限公司 A kind of regulator and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267788A (en) * 1992-06-04 1993-12-15 Strand Lighting Ltd Dimmer circuit
CN107404235A (en) * 2017-09-07 2017-11-28 北京英博电气股份有限公司 A kind of regulator and method

Also Published As

Publication number Publication date
AU3431371A (en) 1973-04-12

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Legal Events

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