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GB2015291A - Improvements in electrical switching circuits using transistors - Google Patents

Improvements in electrical switching circuits using transistors

Info

Publication number
GB2015291A
GB2015291A GB7903813A GB7903813A GB2015291A GB 2015291 A GB2015291 A GB 2015291A GB 7903813 A GB7903813 A GB 7903813A GB 7903813 A GB7903813 A GB 7903813A GB 2015291 A GB2015291 A GB 2015291A
Authority
GB
United Kingdom
Prior art keywords
potential
capacitor
diode
transistor
switching
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
GB7903813A
Other versions
GB2015291B (en
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.)
Mawdsleys Ltd
Original Assignee
Mawdsleys 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 Mawdsleys Ltd filed Critical Mawdsleys Ltd
Priority to GB7903813A priority Critical patent/GB2015291B/en
Publication of GB2015291A publication Critical patent/GB2015291A/en
Application granted granted Critical
Publication of GB2015291B publication Critical patent/GB2015291B/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
    • H03K17/081—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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

An electrical switching circuit for use in chopped power supplies and a.c. to d.c. inverters in which, in order to reduce large transient voltages occurring across the switching elements of such devices, a series connected diode 3 and capacitor 2 are connected across the switching element, transistor 1. The capacitor 1 is connected such that it remains charged to the full d.c. power supply potential, whether transistor 1 is on or off, but tends to become charged to a higher potential still, when the transistor 1 is turned off, due to circuit inductances L1, L2. A diode 4 is connected to limit this rise of potential by switching on whenever the potential across capacitor 2 rises above that of the d.c. supply, thus causing the potential at the junction of capacitor 2 and diode 4 to fall below that of the negative d.c. supply rail. <IMAGE>
GB7903813A 1978-02-03 1979-02-02 Electrical switching circuits using transistors Expired GB2015291B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7903813A GB2015291B (en) 1978-02-03 1979-02-02 Electrical switching circuits using transistors

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB448378 1978-02-03
GB7903813A GB2015291B (en) 1978-02-03 1979-02-02 Electrical switching circuits using transistors

Publications (2)

Publication Number Publication Date
GB2015291A true GB2015291A (en) 1979-09-05
GB2015291B GB2015291B (en) 1982-03-17

Family

ID=26239157

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7903813A Expired GB2015291B (en) 1978-02-03 1979-02-02 Electrical switching circuits using transistors

Country Status (1)

Country Link
GB (1) GB2015291B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041769A1 (en) * 1980-06-09 1981-12-16 General Motors Corporation Transistor chopper circuits
GB2135837A (en) * 1983-02-09 1984-09-05 Hitachi Ltd Power converting apparatus
EP0120417A1 (en) * 1983-03-18 1984-10-03 Siemens Aktiengesellschaft Circuit arrangement for the reduction of switching losses of an electronic switch in D.C. converters
DE3420535A1 (en) * 1984-06-01 1985-12-05 Anton Piller GmbH & Co KG, 3360 Osterode SEMICONDUCTOR MODULE FOR A FAST SWITCHING ARRANGEMENT
FR2569066A1 (en) * 1984-08-10 1986-02-14 Danfoss As ELECTRONIC SWITCHING DEVICE
DE3540551C1 (en) * 1984-06-01 1990-02-15 Piller Gmbh Co Kg Anton Semiconductor module for fast switching arrangement
EP0387734A2 (en) * 1989-03-14 1990-09-19 Hughes Aircraft Company N-Phase sinewave converter
WO1990013177A1 (en) * 1989-04-18 1990-11-01 Boral Johns Perry Industries Pty. Ltd. Circuits with switching protection and parts therefor

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041769A1 (en) * 1980-06-09 1981-12-16 General Motors Corporation Transistor chopper circuits
GB2135837A (en) * 1983-02-09 1984-09-05 Hitachi Ltd Power converting apparatus
EP0120417A1 (en) * 1983-03-18 1984-10-03 Siemens Aktiengesellschaft Circuit arrangement for the reduction of switching losses of an electronic switch in D.C. converters
DE3420535A1 (en) * 1984-06-01 1985-12-05 Anton Piller GmbH & Co KG, 3360 Osterode SEMICONDUCTOR MODULE FOR A FAST SWITCHING ARRANGEMENT
EP0166968A1 (en) * 1984-06-01 1986-01-08 Anton Piller GmbH & Co. KG Semiconductor module for a fast switching arrangement
US4670833A (en) * 1984-06-01 1987-06-02 Anton Piller Gmbh & Co. Kg Semiconductor module for a high-speed switching arrangement
DE3540551C1 (en) * 1984-06-01 1990-02-15 Piller Gmbh Co Kg Anton Semiconductor module for fast switching arrangement
FR2569066A1 (en) * 1984-08-10 1986-02-14 Danfoss As ELECTRONIC SWITCHING DEVICE
EP0387734A2 (en) * 1989-03-14 1990-09-19 Hughes Aircraft Company N-Phase sinewave converter
EP0387734A3 (en) * 1989-03-14 1990-12-12 Hughes Aircraft Company N-phase sinewave converter
WO1990013177A1 (en) * 1989-04-18 1990-11-01 Boral Johns Perry Industries Pty. Ltd. Circuits with switching protection and parts therefor

Also Published As

Publication number Publication date
GB2015291B (en) 1982-03-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee