GB1166417A - A Switching Circuit comprising Thyristors - Google Patents

A Switching Circuit comprising Thyristors

Info

Publication number
GB1166417A
GB1166417A GB1447068A GB1447068A GB1166417A GB 1166417 A GB1166417 A GB 1166417A GB 1447068 A GB1447068 A GB 1447068A GB 1447068 A GB1447068 A GB 1447068A GB 1166417 A GB1166417 A GB 1166417A
Authority
GB
United Kingdom
Prior art keywords
load
thyristor
commutating
thyristors
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.)
Expired
Application number
GB1447068A
Inventor
Sven Nils Johannes Linnman
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1166417A publication Critical patent/GB1166417A/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
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/73—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for dc voltages or currents

Landscapes

  • Motor And Converter Starters (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

1,166,417. Control of D.C. motors. S. N. J. LINNMAN. 26 March, 1968 [29 March, 1967], No. 14470/68. Heading H2J. [Also in Division H3] A circuit suitable for providing variable width pulses to a load (e.g. a D.C. motor) comprises a first thyristor T 1 connected in series with the load, a commutating thyristor T 2 connected to a resistive load R 2 and a commutating capacitor C, the load comprising inductance L such that when the commutating thyristor T 2 is fired, T 1 is extinguished and the circuit R 1 , L, C, R 2 rings causing a reversal of current in R 2 and T 2 to be switched off. Thus when the load is de-energized, both thyristors are off. When the energizing period becomes long and thus the off period short the resonant circuit may not have time to switch off the commutating thyristor but only a little power is wasted. The inductance and resistance may be those of the motor and diode D prevents excessive reverse voltage.
GB1447068A 1967-03-29 1968-03-26 A Switching Circuit comprising Thyristors Expired GB1166417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE430267A SE321289B (en) 1967-03-29 1967-03-29

Publications (1)

Publication Number Publication Date
GB1166417A true GB1166417A (en) 1969-10-08

Family

ID=20263886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1447068A Expired GB1166417A (en) 1967-03-29 1968-03-26 A Switching Circuit comprising Thyristors

Country Status (9)

Country Link
AT (1) AT284965B (en)
BE (1) BE712956A (en)
CH (1) CH471496A (en)
DE (1) DE1638236A1 (en)
FR (1) FR1562389A (en)
GB (1) GB1166417A (en)
IT (1) IT944513B (en)
NL (1) NL6804074A (en)
SE (1) SE321289B (en)

Also Published As

Publication number Publication date
SE321289B (en) 1970-03-02
AT284965B (en) 1970-10-12
BE712956A (en) 1968-07-31
FR1562389A (en) 1969-04-04
DE1638236A1 (en) 1971-08-26
CH471496A (en) 1969-04-15
NL6804074A (en) 1968-09-30
IT944513B (en) 1973-04-20

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees