FR2339906A1 - Current regulator protection against short circuit load conditions - uses auxiliary load comprising transistor collector emitter impedance - Google Patents

Current regulator protection against short circuit load conditions - uses auxiliary load comprising transistor collector emitter impedance

Info

Publication number
FR2339906A1
FR2339906A1 FR7602256A FR7602256A FR2339906A1 FR 2339906 A1 FR2339906 A1 FR 2339906A1 FR 7602256 A FR7602256 A FR 7602256A FR 7602256 A FR7602256 A FR 7602256A FR 2339906 A1 FR2339906 A1 FR 2339906A1
Authority
FR
France
Prior art keywords
current regulator
auxiliary load
protection against
impedance
short 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.)
Granted
Application number
FR7602256A
Other languages
French (fr)
Other versions
FR2339906B1 (en
Inventor
Yves Legrand
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7602256A priority Critical patent/FR2339906A1/en
Publication of FR2339906A1 publication Critical patent/FR2339906A1/en
Application granted granted Critical
Publication of FR2339906B1 publication Critical patent/FR2339906B1/fr
Granted 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
    • G05F1/59—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 including plural semiconductor devices as final control devices for a single load
    • G05F1/595—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 including plural semiconductor devices as final control devices for a single load semiconductor devices connected in series

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

An auxiliary load is connected in series with the output from a current regulator in order to protect the regulator from damage due to short circuit load conditions. The auxiliary load impedance is varied depending on the regulator terminal voltage. A current regulator (1) with zener diode (2) protection against over voltage conditions is connected via diodes (10) in series with an auxiliary load impedance comprising a resistor (5) in parallel with the collector emitter impedance of a transistor (6). The voltage drop across the diodes powers a driver circuit for the transistor. This circuit comprises a comparator (9) followed by a preamplifier (8) and an amplifying (7) stage which is Darlington connected to the variable impedance transistor. Adjustable resistor (17) permits setting of the voltage level at which circuit operates.
FR7602256A 1976-01-28 1976-01-28 Current regulator protection against short circuit load conditions - uses auxiliary load comprising transistor collector emitter impedance Granted FR2339906A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7602256A FR2339906A1 (en) 1976-01-28 1976-01-28 Current regulator protection against short circuit load conditions - uses auxiliary load comprising transistor collector emitter impedance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7602256A FR2339906A1 (en) 1976-01-28 1976-01-28 Current regulator protection against short circuit load conditions - uses auxiliary load comprising transistor collector emitter impedance

Publications (2)

Publication Number Publication Date
FR2339906A1 true FR2339906A1 (en) 1977-08-26
FR2339906B1 FR2339906B1 (en) 1979-07-20

Family

ID=9168458

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7602256A Granted FR2339906A1 (en) 1976-01-28 1976-01-28 Current regulator protection against short circuit load conditions - uses auxiliary load comprising transistor collector emitter impedance

Country Status (1)

Country Link
FR (1) FR2339906A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0001806A2 (en) * 1977-11-07 1979-05-16 Siemens Aktiengesellschaft Electromedical excitation apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1291019B (en) * 1963-11-23 1969-03-20 Fernseh Gmbh Transistor protection circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1291019B (en) * 1963-11-23 1969-03-20 Fernseh Gmbh Transistor protection circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0001806A2 (en) * 1977-11-07 1979-05-16 Siemens Aktiengesellschaft Electromedical excitation apparatus
EP0001806A3 (en) * 1977-11-07 1979-05-30 Siemens Aktiengesellschaft Berlin Und Munchen Electromedical apparatus

Also Published As

Publication number Publication date
FR2339906B1 (en) 1979-07-20

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Legal Events

Date Code Title Description
ST Notification of lapse