GB803239A - Improvements relating to cascade arrangements of magnetic amplifiers and/or transductors in a closed loop system - Google Patents

Improvements relating to cascade arrangements of magnetic amplifiers and/or transductors in a closed loop system

Info

Publication number
GB803239A
GB803239A GB28621/55A GB2862155A GB803239A GB 803239 A GB803239 A GB 803239A GB 28621/55 A GB28621/55 A GB 28621/55A GB 2862155 A GB2862155 A GB 2862155A GB 803239 A GB803239 A GB 803239A
Authority
GB
United Kingdom
Prior art keywords
amplifier
voltage
rectifier
output
magnetic
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
GB28621/55A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB803239A publication Critical patent/GB803239A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G05F1/32—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices
    • G05F1/33—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using magnetic devices having a controllable degree of saturation as final control devices with plural windings through which current to be controlled is conducted
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F9/00—Magnetic amplifiers
    • H03F9/04—Magnetic amplifiers voltage-controlled, i.e. the load current flowing in only one direction through a main coil, e.g. Logan circuits

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)
  • Control Of Voltage And Current In General (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

803,239. Automatic voltage control systems. STANDARD TELEPHONES & CABLES, Ltd. Oct. 7, 1955 [Oct. 11, 1954], No. 28621/55. Class 38 (4). [Also in Group XXXIX] In a voltage regulator using magnetic amplifiers in cascade the connection between the D.C. output of a first magnetic amplifier and a control winding of a second magnetic amplifier inchides a rectifier the voltage across which is used to energize a negative feedback winding on the first amplifier. As shown, the output of an auto-self-excited bridge rectifying amplifier L2 is applied to a bridge rectifier W5 which is said to prevent A.C. being fed back from the control winding of a second magnetic amplifier L1. Feedback winding 9 of the amplifier L2 is connected across the rectifier 8 in the bridge W5 and as rectifier 8 has high resistance for low forward current and a lowering resistance with increasing forward current the feedback is non-linear. The output of amplifier L1 is rectified at W1 and applied to a load R1, R2, a voltage tapped from R2 being compared with a constant voltage source CVS and the difference providing an input to amplifier L2. The source CVS may be a regulator as described in Specification 745,796. The voltage from resistor R2 is adjusted to equal that of CVS when the load is at a minimum and the voltage supplied by transformer T1 is at a maximum, for which same conditions the negative feedback is adjusted by means of resistor R3 to give minimum output from amplifier L2. Specification 803,241, [Group XXXIX], also is referred to.
GB28621/55A 1954-10-11 1955-10-07 Improvements relating to cascade arrangements of magnetic amplifiers and/or transductors in a closed loop system Expired GB803239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU803239X 1954-10-11

Publications (1)

Publication Number Publication Date
GB803239A true GB803239A (en) 1958-10-22

Family

ID=3759550

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28621/55A Expired GB803239A (en) 1954-10-11 1955-10-07 Improvements relating to cascade arrangements of magnetic amplifiers and/or transductors in a closed loop system

Country Status (1)

Country Link
GB (1) GB803239A (en)

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