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GB1054108A - - Google Patents

Info

Publication number
GB1054108A
GB1054108A GB1054108DA GB1054108A GB 1054108 A GB1054108 A GB 1054108A GB 1054108D A GB1054108D A GB 1054108DA GB 1054108 A GB1054108 A GB 1054108A
Authority
GB
United Kingdom
Prior art keywords
voltage
negative
scr1
firing
fired
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.)
Active
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.)
Publication of GB1054108A publication Critical patent/GB1054108A/en
Active 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
    • 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
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4275—Arrangements for improving power factor of AC input by adding an auxiliary output voltage in series to the input
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Electrical Variables (AREA)
  • Inverter Devices (AREA)

Abstract

1,054,108. Inverting. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. Sept. 14, 1964 [Sept. 27, 1963], No. 38161/63. Heading H2F. To vary the D.C. input voltage of an inverter 1 comprising SCR4 and SCR5 connected to the two ends of a centre-tapped transformer T, a circuit 2 is provided containing two further SCR's which are so fired in relation to the A.C. output waveform of the inverter 1 as to provide at terminals 3 and 4 a variable bucking voltage for the inverter. SCR1 and SCR2 which are supplied with a portion of the output voltage from the transformer, are alternately fired at the near 180-degree points on the waveform, that is when terminals 5 and 6 are about to go alternately negative (Fig. 5c) so that terminal 4 remains negative and 3 positive. With current flowing continuously into terminal 3 and out of 4, power flows from the D.C. side to the A.C. side. By firing SCR3 to short-circuit terminals 3 and 4, the mean D.C. voltage across them (Fig. 5a) can be adjusted from zero to maximum negative so that the input voltage to the main inverter 1, and hence its output voltage, can be decreased to a greater or lesser extent. Capacitor C and inductance L form a filter for both inverters. Capacitor C is provided for power factor improvement. SCR3 may be omitted (Fig. 2, not shown) and the mean D.C. voltage altered by varying the point of firing of SCR1 and SCR2. For instance, if SCR1 is first fired at the 90 degree peak when terminal 5 is positive and is shut off at the 270 degree negative peak, whereupon SCR2 is fired on its positive peak and shut off on the negative, the mean voltage across terminals 3 and 4 is zero (Fig. 5b), and by delaying the firing of SCR1 to nearly the 180 degree point maximum negative voltage is obtained as above (Fig. 5c). The firing of one SCR will shut off the other one.
GB1054108D 1960-10-21 Active GB1054108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36221/60A GB920184A (en) 1960-10-21 1960-10-21 Improvements in or relating to inverter circuits

Publications (1)

Publication Number Publication Date
GB1054108A true GB1054108A (en)

Family

ID=10386096

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1054108D Active GB1054108A (en) 1960-10-21
GB36221/60A Expired GB920184A (en) 1960-10-21 1960-10-21 Improvements in or relating to inverter circuits

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB36221/60A Expired GB920184A (en) 1960-10-21 1960-10-21 Improvements in or relating to inverter circuits

Country Status (2)

Country Link
BE (1) BE653353A (en)
GB (2) GB920184A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757293A1 (en) * 1977-12-22 1979-06-28 Bbc Brown Boveri & Cie CONVERTER CIRCUIT

Also Published As

Publication number Publication date
GB920184A (en) 1963-03-06
BE653353A (en)

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