GB1308695A - Switching circuit arrangements - Google Patents

Switching circuit arrangements

Info

Publication number
GB1308695A
GB1308695A GB1871470A GB1871470A GB1308695A GB 1308695 A GB1308695 A GB 1308695A GB 1871470 A GB1871470 A GB 1871470A GB 1871470 A GB1871470 A GB 1871470A GB 1308695 A GB1308695 A GB 1308695A
Authority
GB
United Kingdom
Prior art keywords
transistor
turn
current
transformer
transistors
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
GB1871470A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1308695A publication Critical patent/GB1308695A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02M7/5383—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 in a self-oscillating arrangement
    • H02M7/53832—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 in a self-oscillating arrangement in a push-pull arrangement
    • H02M7/53835—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 in a self-oscillating arrangement in a push-pull arrangement of the parallel type

Landscapes

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

Abstract

1308695 Transistor oscillators LICENTIA PATENT - VERWALTUNGS - GmbH 20 April 1970 [20 June 1969] 18714/70 Heading H3T A circuit of the kind in which switching between two current carrying transistors TS1<SP>1</SP>, TS1<SP>11</SP> is triggered by increasing magnetizing current in a saturable transformer U, e.g. for D.C. to A.C. conversion, comprises a further transformer U1 having primaries in series with the transistors and secondaries arranged to turn on the appropriate one of two auxiliary transistors associated with the main ones. The collector of each transistor TS1<SP>1</SP>, TS1<SP>11</SP> is connected to push-pull input windings WP<SP>1</SP>, WP<SP>11</SP> of transformer U via primary windings W1<SP>1</SP>, W1<SP>11</SP> of the second transformer U1, the secondaries of which W2<SP>1</SP>, W2<SP>11</SP> are connected between base and emitter of the auxiliary transistors TS2<SP>1</SP>, TS2<SP>11</SP> either of which is thereby turned on when the current through its associated main transistor exceeds a predetermined value. Turn-on of an auxiliary transistor connects a capacitor C2, which has been charged over a diode Gr2<SP>11</SP> or Gr2<SP>1</SP> from feedback windings WR<SP>1</SP>, WR<SP>11</SP>, to the base/emitter of its main transistor to turn it off, and in the conventional manner, turn on the opposite one. The feedback windings WR<SP>1</SP>, WR<SP>11</SP> are also connected via a diode Gr1 which is shunted by a capacitor C1 to provide a path before Gr1 starts to conduct. Starting current for TS1<SP>1</SP>, TS1<SP>11</SP> is provided from the supply via high resistance R1. At turn-off of either main transistor the associated feedback current is diverted to the collector of the appropriate auxiliary transistor and the base charge on the main transistor is rapidly removed.
GB1871470A 1969-06-20 1970-04-20 Switching circuit arrangements Expired GB1308695A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691931234 DE1931234A1 (en) 1969-06-20 1969-06-20 Circuit arrangement for converting a direct voltage into an alternating voltage with transistors

Publications (1)

Publication Number Publication Date
GB1308695A true GB1308695A (en) 1973-02-21

Family

ID=5737489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1871470A Expired GB1308695A (en) 1969-06-20 1970-04-20 Switching circuit arrangements

Country Status (3)

Country Link
AT (1) AT298617B (en)
DE (1) DE1931234A1 (en)
GB (1) GB1308695A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150510A1 (en) * 1980-12-22 1982-08-19 Anglo Amer Corp South Africa WELDING PROCESS AND WELDING DEVICE
DE3322455A1 (en) * 1982-06-22 1983-12-22 Anglo Amer Corp South Africa ELECTRIC WELDING APPARATUS

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3150510A1 (en) * 1980-12-22 1982-08-19 Anglo Amer Corp South Africa WELDING PROCESS AND WELDING DEVICE
US4453073A (en) * 1980-12-22 1984-06-05 Crucible Societe Anonyme High frequency welding apparatus
DE3322455A1 (en) * 1982-06-22 1983-12-22 Anglo Amer Corp South Africa ELECTRIC WELDING APPARATUS
US4520255A (en) * 1982-06-22 1985-05-28 Crucible Societe Anonyme High frequency self-oscillating welding apparatus

Also Published As

Publication number Publication date
AT298617B (en) 1972-05-10
DE1931234A1 (en) 1971-01-07

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Legal Events

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