US2905880A - Voltage regulating system - Google Patents

Voltage regulating system Download PDF

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Publication number
US2905880A
US2905880A US545885A US54588555A US2905880A US 2905880 A US2905880 A US 2905880A US 545885 A US545885 A US 545885A US 54588555 A US54588555 A US 54588555A US 2905880 A US2905880 A US 2905880A
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US
United States
Prior art keywords
tubes
voltage regulating
regulating system
sequence
current
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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 - Lifetime
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US545885A
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English (en)
Inventor
Hess Karl Walter
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.)
US Philips Corp
North American Philips Co Inc
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US Philips Corp
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Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/12—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC
    • G05F1/40—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using discharge tubes or semiconductor devices as final control devices
    • G05F1/42—Regulating voltage or current  wherein the variable actually regulated by the final control device is AC using discharge tubes or semiconductor devices as final control devices discharge tubes only

Definitions

  • This invention concerns improved voltage regulating systems of the type utilizing polyphase transformers.
  • Voltage regulating systems which utilize a polyphase transformer for controlling the supply of A.C. loads by means of controlled electron discharge tubes of gas or vapor filled type; said tubes being connected to the primary side of said transformer.
  • the tubes are so controlled that the frequency obtained at the secondary side of said transformer is lower than the frequency of the voltage applied to said primary side.
  • the tubes usually operate at constant current values which are different for each tube. This causes the tubes to be loaded differently, so that the life of one tube is shorter than the life of another tube and several tubes operate with only a partial load. Furthermore, the primary windings of the transformer are loaded differently. Serious difiiculties are thus presented.
  • the disadvantages of known voltage regulating systems utilizing polyphase transformers are obviated by the system of the present invention, wherein the current control of the tubes is sequentially or cyclically shifted in such a manner that all the discharge tubes carry the same average load current.
  • the cyclic control maybe effected in any known manner, such as by rotary contact switching means, relay control means, or electronic control means, operating in a predetermined sequence. Since all the electron discharge tubes carry the same average load current, the difficulties inherent in the known systems are avoided.
  • the principal object of this invention is the provision of a new and improved voltage regulating system of the type utilizing polyphase transformers.
  • Another object of this invention is the provision of a new and improved voltage regulating system which is simple in structure and inexpensive to operate.
  • a further object of this invention is the provision of a new and improved voltage regulating system having high operative efficiency.
  • Fig. 1 is a series of curves illustrating the input voltage and tube currents of a preferred embodiment of the voltage regulating system of the present invention.
  • Fig. 2 is a preferred embodiment of the voltage regulating system of the present invention.
  • Fig. 1 the curves 1, 2 and 3 represent the input voltages of the embodiment of the voltage regulating system shown in Fig. 2. Each of the curves 1, 2 and 3 represents a phase of said input voltage.
  • the curves 14, 15, 16, 17, 18 and 19 represent the currents carried by the tubes of the embodiment of the voltage regulating system shown in Fig. 2.
  • the curves 14 and 17 represent the current in the tubes 8 and 9
  • the curves and 18 represent the current in the tubes 10 and 11
  • the curves 16 and 19 represent the current in the tubes 12 and 13.
  • the voltage regulating system shown in Fig. 2 comprises a polyphase transformer 4, which in the embodiment of Fig. 2, has three primary windings, 5, 6, and 7, and one secondary winding 14.
  • the transformer 4 may be utilized for the welding of a workpiece at 15, if desired; said workpiece being connected across the secondary winding 14.
  • the primary winding 5 is connected in series with the anti-parallel connection of the controlled electron discharge tubes 8 and 9.
  • the primary winding 6 is connected in series with the anti-parallel connection of the controlled electron discharge tubes 10 and 11.
  • the primary winding 7 is connected in series with the antiparallel connection of the controlled electron discharge tubes 12 and 13.
  • Current control apparatus for controlling the current flow through the electron discharge tubes may be of ay suitable type known in the art.
  • Cyclic switching control for controlling the operation of the electron discharge tubes may be of any suitable type known in the art.
  • the electron discharge tubes 8, 9, 10, 11, 12 and 13 may be of gas or vapor filled type.
  • the voltage regulating system of Fig. 2 functions to make the tubes successively conductive in a predetermined sequence or cycle, in order to insure that all of said tubes carry the same average load current.
  • the tubes may, for instance, be made conductive in the sequence 8, 10, 12, pause, 9, 11, 13.
  • the current through each tube varies, as shown in Fig. l, by the curves 14, 15, 16, 17, 18 and 19. These curves indicate that the tubes 8 and 9 are least heavily loaded, the tubes 10 and 11 are loaded more heavily, and the tubes 12 and 13 are loaded most heavily.
  • the winding 5 is least heavily loaded, the winding 6 is more heavily loaded, and the winding 7 is most heavily loaded.
  • each tube 8, 10 and 12 may be made conductive in the next cycle in the sequence 12, 8 and 10, and they may be made conductive in the cycle after that in the sequence 10, 12 and 8.
  • the tubes 9, 11 and 13 also may be made conductive, they may be made conductive in the next cycle in the sequence 13, 9 and 11, and they may be made conductive in the cycle after that in the sequence 11, 13 and 9.
  • each tube and each primary winding is made to carry the same average load.
  • An electrical circuit arrangement comprising input means for a polyphase alternating current supply, a plurality of electron discharge tubes each energized by a different phase of said current supply, a common output circuit for said discharge tubes, means for producing electrical conduction in said tubes in a given sequence and at given current values, and means for cyclically changing the conduction sequence of said tubes.
  • An electrical circuit arrangement comprising input means for a polyphase alternating current supply, a plurality of electron discharge tubes each energized by a different phase of said current supply, a common output circuit for said discharge tubes, means for producing electrical conduction in said tubes in a given sequence and at diflerent current values, and means for cyclically changing the conduction sequence of said tubes whereby the same average load current flows through said tubes.
  • An electrical circuit arrangement comprising input means for a polyphase alternating current supply, a plurality of electron discharge tubes each having a control tubes for producing electrical conductionin said tubes in a predetermined sequence and at difierent current values, means for cyclically changing the conduction sequence of said tubes, and means for deriving a common output voltage from said tubes comprising an output winding in inductive relation with the input windings of said system.
  • An electrical circuit arrangement comprising input imeans for a polyphase alternating current supply, a plurality of electron discharge tubes each having a control electrode, pairs of said tubes being connected in antiparallel connection, a series circuit arrangement con- -hected across each phase of said current supply comprising an input Winding connected in series with an anti-parallel connection of two of said tubes, means connected to the control electrodes of said tubes for produciug electrical conduction in said tubes in a predetermined 4 sequence and at different current values, said last-mentioned means comprising tube conduction control means for making each tube conducting and cyclic switching control means connected to the control electrode of each tube for coupling asid conduction control means to each tube in a desired predetermined sequence and means including said cyclic switching control means ,for cyclically changing the conduction sequence and the conduction current values of said tubes.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Ac-Ac Conversion (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
US545885A 1954-11-11 1955-11-09 Voltage regulating system Expired - Lifetime US2905880A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL338916X 1954-11-11

Publications (1)

Publication Number Publication Date
US2905880A true US2905880A (en) 1959-09-22

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ID=19784631

Family Applications (1)

Application Number Title Priority Date Filing Date
US545885A Expired - Lifetime US2905880A (en) 1954-11-11 1955-11-09 Voltage regulating system

Country Status (4)

Country Link
US (1) US2905880A (enrdf_load_stackoverflow)
BE (1) BE542688A (enrdf_load_stackoverflow)
CH (1) CH338916A (enrdf_load_stackoverflow)
DE (1) DE1110284B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274482A (en) * 1961-06-13 1966-09-20 Bbc Brown Boveri & Cie Frequency changer for frequency conversion of three phase alternating currents
US3297937A (en) * 1963-02-13 1967-01-10 Benchimol Augusto Frequency converter utilizing magnetic amplifiers and scr's
US3309605A (en) * 1963-08-19 1967-03-14 Tektronix Inc Frequency converter wherein an astable oscillator is free running at high frequency input signals and is synchronized to low frequency input signals

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394565A (en) * 1917-08-24 1921-10-25 John E Long Electric sign
US1835912A (en) * 1929-11-19 1931-12-08 Sprague Signs Inc Universal electric sign system
US2431083A (en) * 1944-09-01 1947-11-18 Welding Research Inc Electric valve converting system
US2474867A (en) * 1945-12-20 1949-07-05 Welding Research Inc Protective system for three-phase single-phase machines
US2549831A (en) * 1948-05-21 1951-04-24 Westinghouse Electric Corp Conversion system
US2619625A (en) * 1949-07-01 1952-11-25 Westinghouse Electric Corp Frequency converter control
US2704820A (en) * 1951-02-24 1955-03-22 William H Martin Phase and frequency conversion system
US2760141A (en) * 1952-06-04 1956-08-21 Westinghouse Electric Corp Electric discharge apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE406793A (enrdf_load_stackoverflow) * 1934-07-04 1935-01-01
DE709781C (de) * 1934-09-13 1941-08-27 Siemens Schuckertwerke Akt Ges Steuerung von mehrphasigen Gas- oder Dampfentladungsstrecken mit einer verhaeltnismaessig schwachen Steuerenergiequelle
CH199296A (de) * 1936-04-25 1938-08-15 Licentia Gmbh Verfahren zur Regelung von Stromrichtern.
DE892932C (de) * 1951-09-01 1953-10-12 Licentia Gmbh Anordnung zur unsymmetrischen Steuerung von mit gittergesteuerten Dampf- oder Gasentladungsstrecken arbeitenden Stromrichtern

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1394565A (en) * 1917-08-24 1921-10-25 John E Long Electric sign
US1835912A (en) * 1929-11-19 1931-12-08 Sprague Signs Inc Universal electric sign system
US2431083A (en) * 1944-09-01 1947-11-18 Welding Research Inc Electric valve converting system
US2474867A (en) * 1945-12-20 1949-07-05 Welding Research Inc Protective system for three-phase single-phase machines
US2549831A (en) * 1948-05-21 1951-04-24 Westinghouse Electric Corp Conversion system
US2619625A (en) * 1949-07-01 1952-11-25 Westinghouse Electric Corp Frequency converter control
US2704820A (en) * 1951-02-24 1955-03-22 William H Martin Phase and frequency conversion system
US2760141A (en) * 1952-06-04 1956-08-21 Westinghouse Electric Corp Electric discharge apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274482A (en) * 1961-06-13 1966-09-20 Bbc Brown Boveri & Cie Frequency changer for frequency conversion of three phase alternating currents
US3297937A (en) * 1963-02-13 1967-01-10 Benchimol Augusto Frequency converter utilizing magnetic amplifiers and scr's
US3309605A (en) * 1963-08-19 1967-03-14 Tektronix Inc Frequency converter wherein an astable oscillator is free running at high frequency input signals and is synchronized to low frequency input signals

Also Published As

Publication number Publication date
BE542688A (enrdf_load_stackoverflow)
CH338916A (de) 1959-06-15
DE1110284B (de) 1961-07-06

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