GB1181853A - A Circuit Arrangement for Protecting Transistors in Circuit - Google Patents

A Circuit Arrangement for Protecting Transistors in Circuit

Info

Publication number
GB1181853A
GB1181853A GB2579667A GB2579667A GB1181853A GB 1181853 A GB1181853 A GB 1181853A GB 2579667 A GB2579667 A GB 2579667A GB 2579667 A GB2579667 A GB 2579667A GB 1181853 A GB1181853 A GB 1181853A
Authority
GB
United Kingdom
Prior art keywords
circuit
thyristor
current
voltage
inductor
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
GB2579667A
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.)
Cegelec SA
Original Assignee
Cegelec 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 Cegelec SA filed Critical Cegelec SA
Publication of GB1181853A publication Critical patent/GB1181853A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0826—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in bipolar transistor switches
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/44—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the rate of change of electrical quantities
    • H02H3/445—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the rate of change of electrical quantities of DC quantities
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
    • H03K17/0814—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit
    • H03K17/08146—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the output circuit in bipolar transistor switches

Landscapes

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

Abstract

1,181,853. Overload protection for transistors. SOC. GENERALE DE CONSTRUCTIONS ELECTRIQUES ET MECANIQUES (ALSTHOM). 3 June, 1967 [3 June, 1966], No. 25796/67. Heading H3T. [Also in Division H2] A transistor 2 is protected by connecting across it a thyristor 4 and firing it in dependence upon the voltage across an inductor 3 carrying the transistor current or a current representing it. Thus, should the load 1 become short-circuit, the rise of current will produce a sufficient voltage across inductor 4 to break down a Zener diode 6 and fire thyristor 4. A second thyristor 5 is also fired and this opens a relay contact 10 which operates a circuit-breaker. Contact 12 of the relay extinguishes thyristor 5. The circuit may be self-restoring. Zener diodes 7 and 8 protect the gate electrodes and Zener diode 6 also breaks down and effects the protection if the circuit voltage is too high. 13 is a fuse.
GB2579667A 1966-06-03 1967-06-03 A Circuit Arrangement for Protecting Transistors in Circuit Expired GB1181853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2687A FR1494802A (en) 1966-06-03 1966-06-03 Rapid protection device for transistors connected in series in a circuit

Publications (1)

Publication Number Publication Date
GB1181853A true GB1181853A (en) 1970-02-18

Family

ID=9696511

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2579667A Expired GB1181853A (en) 1966-06-03 1967-06-03 A Circuit Arrangement for Protecting Transistors in Circuit

Country Status (5)

Country Link
BE (1) BE699061A (en)
DE (1) DE1613873A1 (en)
FR (1) FR1494802A (en)
GB (1) GB1181853A (en)
NL (1) NL6707763A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582879A1 (en) * 1985-06-04 1986-12-05 Telemecanique Electrique STATIC SWITCHING APPARATUS OR CIRCUIT FOR PROTECTED POWER SUPPLY OF A LOAD AND ITS LINE
WO2004112966A1 (en) * 2003-06-25 2004-12-29 Siemens Aktiengesellschaft Electrostatic filter with over-voltage protection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582879A1 (en) * 1985-06-04 1986-12-05 Telemecanique Electrique STATIC SWITCHING APPARATUS OR CIRCUIT FOR PROTECTED POWER SUPPLY OF A LOAD AND ITS LINE
WO1986007510A1 (en) * 1985-06-04 1986-12-18 La Telemecanique Electrique Static switch circuit or device for the protected supply of a load, and its line
US4763220A (en) * 1985-06-04 1988-08-09 La Telemecanique Electrique Static switch circuit or device for the protected supply of a load, and its line
WO2004112966A1 (en) * 2003-06-25 2004-12-29 Siemens Aktiengesellschaft Electrostatic filter with over-voltage protection

Also Published As

Publication number Publication date
NL6707763A (en) 1967-12-04
BE699061A (en) 1967-11-03
DE1613873A1 (en) 1971-03-11
FR1494802A (en) 1967-09-15

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