GB928297A - Improvements in or relating to protective arrangements for transistors - Google Patents

Improvements in or relating to protective arrangements for transistors

Info

Publication number
GB928297A
GB928297A GB19044/60A GB1904460A GB928297A GB 928297 A GB928297 A GB 928297A GB 19044/60 A GB19044/60 A GB 19044/60A GB 1904460 A GB1904460 A GB 1904460A GB 928297 A GB928297 A GB 928297A
Authority
GB
United Kingdom
Prior art keywords
transistor
voltage
zener diode
relay
energize
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
GB19044/60A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB928297A publication Critical patent/GB928297A/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
    • G05F1/571—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 overvoltage 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
    • G05F1/56—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Relay Circuits (AREA)
  • Electronic Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

928,297. Protective arrangements. PHILIPS ELECTRICAL INDUSTRIES Ltd. May 30, 1960 [June 2, 1959], No. 19044/60. Class 38 (5). [Also in Groups XXXV and XL (c)] A circuit arrangement for protecting a transistor from voltage overload comprises a further transistor and a Zener diode so arranged that when the voltage applied to the first transistor exceeds the breakdown voltage of the Zener diode, the further transistor conducts to energize a self-holding relay which reduces the voltage applied to the first transistor. In the embodiments illustrated the transistor 1 constitutes the series element of a voltage stabilizing circuit provided with feed-back through direct-coupled amplifier 6. In Fig. 2, when the voltage across transistor 1 is such as to cause breakdown of Zener diode 2, current flows out of the base of transistor 7 which accordingly is rendered conductive to energize relay 10. Contact 13 closes to cause the relay to hold and contact 12 opens to disconnect the series circuit through transistor 1 with the exception of that through resistor 9, the basecollector diode of transistor 7, contact 13 and resistor 14. In Fig. 3, Zener diode 2 is normally conductive. When the voltage across transistor 1 exceeds that established across the Zener diode, transistor 7 conducts to energize relay 10 so causing contacts 15 to change over to energize a holding winding on the relay and disconnect the transistor 1.
GB19044/60A 1959-06-02 1960-05-30 Improvements in or relating to protective arrangements for transistors Expired GB928297A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN16794A DE1080215B (en) 1959-06-02 1959-06-02 Protection circuit for a transistor

Publications (1)

Publication Number Publication Date
GB928297A true GB928297A (en) 1963-06-12

Family

ID=25988644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19044/60A Expired GB928297A (en) 1959-06-02 1960-05-30 Improvements in or relating to protective arrangements for transistors

Country Status (6)

Country Link
JP (1) JPS384832B1 (en)
BE (1) BE591446A (en)
DE (1) DE1080215B (en)
FR (1) FR1258663A (en)
GB (1) GB928297A (en)
NL (2) NL108097C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2323934A1 (en) * 1973-05-11 1974-11-28 Atoma Gmbh PROTECTIVE CIRCUIT FOR SWITCHING TRANSISTORS

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA673555A (en) * 1959-07-01 1963-11-05 Westinghouse Electric Corporation Protection of rotating rectifier assemblies
DE1223032B (en) * 1961-10-25 1966-08-18 Telefunken Patent Arrangement for controlling the armature voltage of a direct current shunt motor
DE1152187B (en) * 1961-12-13 1963-08-01 Danfoss As Protection circuit for a rectifier arrangement
DE1177736B (en) * 1962-04-25 1964-09-10 Rohde & Schwarz Overload protection for electronically stabilized power supplies
DE1152480B (en) * 1962-08-16 1963-08-08 Telefunken Patent Electronic fuse for a stabilized power supply
DE1187317B (en) * 1963-03-12 1965-02-18 Licentia Gmbh Protective device for a method for controlling or regulating the speed of asynchronous motors
DE1221291B (en) * 1965-01-23 1966-07-21 Telefunken Patent Overload protection device for multi-stage transistorized amplifiers, especially for carrier frequency line amplifiers
DE1293335C2 (en) * 1966-03-17 1973-02-01 Siemens Ag Circuit arrangement for contactless control modules
DE4135769A1 (en) * 1991-10-30 1993-05-06 Robert Bosch Gmbh, 7000 Stuttgart, De DEVICE FOR CHARGING A BATTERY

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2323934A1 (en) * 1973-05-11 1974-11-28 Atoma Gmbh PROTECTIVE CIRCUIT FOR SWITCHING TRANSISTORS

Also Published As

Publication number Publication date
FR1258663A (en) 1961-04-14
NL108097C (en)
NL252093A (en)
BE591446A (en) 1960-12-01
JPS384832B1 (en) 1963-04-26
DE1080215B (en) 1960-04-21

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