GB1295839A - - Google Patents

Info

Publication number
GB1295839A
GB1295839A GB1295839DA GB1295839A GB 1295839 A GB1295839 A GB 1295839A GB 1295839D A GB1295839D A GB 1295839DA GB 1295839 A GB1295839 A GB 1295839A
Authority
GB
United Kingdom
Prior art keywords
output voltage
thyristors
inverter
resistor
dependent
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
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 filed Critical
Publication of GB1295839A publication Critical patent/GB1295839A/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
    • H02M7/505—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 thyratron or thyristor type requiring extinguishing means
    • H02M7/515—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/525—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 thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Rectifiers (AREA)

Abstract

1295839 Inverting WESTINGHOUSE BRAKE & SIGNAL CO Ltd 17 Feb 1970 [28 Feb 1969] 10718/69 Heading H2F In an inverter, triggering pulses for at least two alternately conducting controlled rectifiers 4...8 are derived at a time before the zero of the output voltage by a circuit dependent on the output voltage and on its differential so as to ensure adequate extinction interval. As shown in Fig. 7 an inverter comprising a bridge of thyristors 4... 8 feeds an induction heater winding connected across output terminals B, D. The thyristors are triggered in pairs shortly before the output voltage passes through zero. Resistor 15 and capacitor 14 respectively provide currents dependent on the output voltage and on its differential. Transistor 34 provides pulses corresponding to half cycles of one polarity of the combined current through 14 and 15; these pulses are steered by transistors 37, 38, 41, 44 to appropriate pulse generators 31, 32 feeding the respective pairs of thyristors 4... 8. In Fig. 6 (not shown) a pair of circuits 14, 15 are supplied from a centre tapped secondary winding of a transformer connected across the output terminals B, D, each circuit feeding a respective transistor 34, diode 33 combination. In Fig. 5 (not shown) a common pair of components 14, 15 supplies pulse generators of opposite conductivity type. In Fig. 10 (not shown) resistor 15 is bridged by a pair of Zener diodes and resistors connected across a conventional diode bridge so that the firing angle is dependent on output voltage. In Fig. 8a, components 14, 15 are replaced by an RL combination bridged by a zero passage detector 49. The resistor R may be connected in series with a baretter or the inductor may be made saturable so as to make the conduction angle a function of output voltage. In Fig. 13 (not shown) a current transformer is included on the D.C. side of the inverter so that the conduction angle is also a function of current.
GB1295839D 1969-02-28 1969-02-28 Expired GB1295839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1071869 1969-02-28

Publications (1)

Publication Number Publication Date
GB1295839A true GB1295839A (en) 1972-11-08

Family

ID=9973007

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1295839D Expired GB1295839A (en) 1969-02-28 1969-02-28

Country Status (8)

Country Link
AT (1) AT314657B (en)
AU (1) AU1200270A (en)
BE (1) BE746607A (en)
CH (1) CH550510A (en)
DE (1) DE2008239B2 (en)
FR (1) FR2033420B1 (en)
GB (1) GB1295839A (en)
SE (1) SE370601B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2541661C3 (en) * 1975-09-18 1981-08-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Device for controlling the ignition angle of a resonant circuit inverter

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774012A (en) * 1952-06-04 1956-12-11 Asea Ab Control means for static current converters
US3343063A (en) * 1964-09-21 1967-09-19 Gen Electric Variable frequency converter with volts per cycle per second regulation
AT261066B (en) * 1966-01-25 1968-04-10 Elin Union Ag Phase control for the ignition pulses of the controlled electrical valves of a load-controlled converter

Also Published As

Publication number Publication date
DE2008239B2 (en) 1976-09-02
FR2033420A1 (en) 1970-12-04
BE746607A (en) 1970-07-31
SE370601B (en) 1974-10-21
AU1200270A (en) 1971-09-09
AT314657B (en) 1974-04-25
DE2008239A1 (en) 1970-09-10
FR2033420B1 (en) 1974-10-11
CH550510A (en) 1974-06-14

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Legal Events

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