GB928814A - Improvements relating to voltage stabiliser circuits - Google Patents

Improvements relating to voltage stabiliser circuits

Info

Publication number
GB928814A
GB928814A GB1998060A GB1998060A GB928814A GB 928814 A GB928814 A GB 928814A GB 1998060 A GB1998060 A GB 1998060A GB 1998060 A GB1998060 A GB 1998060A GB 928814 A GB928814 A GB 928814A
Authority
GB
United Kingdom
Prior art keywords
transistor
current
voltage
series
circuit
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
GB1998060A
Inventor
John George Cooper
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB1998060A priority Critical patent/GB928814A/en
Publication of GB928814A publication Critical patent/GB928814A/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
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G05F1/573—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector
    • 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
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/618—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series and in parallel with the load as final control devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

928,814. Automatic voltage control. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. June 7, 1961 [June 7, 1960], No. 19980/60. Class 38 (4). In a voltage regulator of the series transistor type the load current passes through a second transistor in series with the control transistor and means are provided for preventing the baseemitter voltage of the second transistor from exceeding a predetermined value whereby the short-circuit current is limited. As shown, the control transistor T1 is connected in series with a resistor R and a second transistor T3 between input terminal 1 and output terminal 3, the conduction of T1 being controlled by the circuit including potential divider R1, R2, transistor T2 and reference Zener diode Z1 so that the output volts V 0 remain constant. The base of transistor T3 is connected to the junction between a Zener diode Z2 and a resistor R4 connected in series, with a fuse F, between terminals 1 and 3 so that the maximum baseemitter voltage of T3 is limited to V z , the Zener diode voltage, and R 4 limits the diode current. On short circuit the effective resistance of T1 is zero and the short-circuit current is limited to a value given by V z /R, the value of R being so chosen that the short-circuit current is less than the maximum rating of T1 and T3 but greater than the capacity of fuse F. A resistor R5 may be connected across transistor T3 to reduce the power dissipated in T3 during normal operation. The transistors T1 and T3 may each be replaced by two transistors in parallel (Fig. 2, not shown) so as to increase the maximum current capacity of the circuit, and a shunt regulator, comprising a further transistor connected to a point between the two series transistors, may be provided so that there is furnished a current-conducting path when the input voltage is above a particular value and the output current is below a particular value.
GB1998060A 1960-06-07 1960-06-07 Improvements relating to voltage stabiliser circuits Expired GB928814A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1998060A GB928814A (en) 1960-06-07 1960-06-07 Improvements relating to voltage stabiliser circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1998060A GB928814A (en) 1960-06-07 1960-06-07 Improvements relating to voltage stabiliser circuits

Publications (1)

Publication Number Publication Date
GB928814A true GB928814A (en) 1963-06-19

Family

ID=10138338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1998060A Expired GB928814A (en) 1960-06-07 1960-06-07 Improvements relating to voltage stabiliser circuits

Country Status (1)

Country Link
GB (1) GB928814A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235786A (en) * 1962-02-12 1966-02-15 Ind Processes Ltd Voltage stabilizer with series transistors
DE1297194B (en) * 1964-06-18 1969-06-12 Siemens Ag Voltage regulator with overload protection
DE1513237B1 (en) * 1964-06-27 1971-05-13 Philips Gloeilampenfabrieken Nv Direct current source that responds to current fluctuations and is voltage-stabilized using transistors and a control transformer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235786A (en) * 1962-02-12 1966-02-15 Ind Processes Ltd Voltage stabilizer with series transistors
DE1297194B (en) * 1964-06-18 1969-06-12 Siemens Ag Voltage regulator with overload protection
DE1513237B1 (en) * 1964-06-27 1971-05-13 Philips Gloeilampenfabrieken Nv Direct current source that responds to current fluctuations and is voltage-stabilized using transistors and a control transformer

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