US3238417A - Mercury arc rectifier connection with parallel discharge paths - Google Patents

Mercury arc rectifier connection with parallel discharge paths Download PDF

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Publication number
US3238417A
US3238417A US240004A US24000462A US3238417A US 3238417 A US3238417 A US 3238417A US 240004 A US240004 A US 240004A US 24000462 A US24000462 A US 24000462A US 3238417 A US3238417 A US 3238417A
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United States
Prior art keywords
rectifier
discharge paths
mercury arc
current
discharge
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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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US240004A
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English (en)
Inventor
Boksjo Carl Ingvar
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ABB Norden Holding AB
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ASEA AB
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Publication date
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    • 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
    • H02M1/02—Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters
    • H02M1/04—Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters for tubes with grid control
    • 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
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of AC power input into DC 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
    • H02M7/15—Conversion of AC power input into DC 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 discharge tubes 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
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
    • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
    • H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of AC power input into DC 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
    • H02M7/15—Conversion of AC power input into DC 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 discharge tubes only
    • H02M7/153—Conversion of AC power input into DC 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 discharge tubes only arranged for operation in parallel

Definitions

  • the present invention refers to a mercury arc rectifier connection with parallel discharge paths and provides a solution to the problem of producing a suitable distribution of the current between the separate discharge paths.
  • the present invention ditfers from this principle in that it suggests different ignition times of parallel discharge paths, in such a way that when the current in the first discharge path has grown to a desired magnitude the next discharge path is ignited, etc.
  • impedances are inserted in the conductors to the diiferent discharge paths and a mercury arc rectifier connection according to the invention will therefore be characterised in that the ignition times for the different discharge paths are delayed according to a certain programme, which programme as well as the relation between the impedances inserted in the rectifier conductors, is adapted in relation to the desired current distribution between the difierent discharge paths.
  • the impedance for the first-ignited discharge path is the largest, while the impedance decreases with increasing displacement of the ignition time.
  • the first-ignited discharge path will have the least current while the later igniting discharge paths have greater currents.
  • the invention thus gives the advantage that only the firstignited discharge path is ignited at the full commutating voltage.
  • the last-ignited discharge path does not need to be supplied with any impedance as no voltage is required for igniting any following discharge paths.
  • the last-ignited discharge path preferably has the largest current it is advantageous to avoid any impedances in series with this.
  • the extinguishing sequence will be opposite to the ignition sequence because the current derivatives correspond to the inductances. In this way the deionising of the first-extinguishing discharge paths is improved.
  • a further advantage with the invention is that because the voltage concentrations at ignition of the later discharge paths in the sequence are very limited in relation to the first ignited discharge path, the voltage dividers for the later-ignited discharge paths could be dimensioned for these limited voltages.
  • Equal current distribution involves namely equal resistance distribution
  • FIGURE 1 shows a mercury arc rectifier connection according to the invention, comprising two parallel discharge paths
  • FIG- URE 2 shows a further development of the invention.
  • FIG- URE 1 shows a mercury arc rectifier connection according to the invention, comprising two parallel discharge paths
  • FIG- URE 2 shows a further development of the invention.
  • two discharge paths are shown in both cases but as is clear from the above an arbitrary number of discharge paths could be inserted in the ignition sequence between the two shown.
  • FIGURE 1 shows a mercury arc rectifier connection comprising two parallel connected discharge paths 1 and 2. Both paths consist of an anode 11 and 21 respectively, a voltage divider 12 and 22 respectively with pertaining intermediate electrodes 13 and 23 respectively and a cathode 14 and 24. respectively.
  • each mercury arc rectifier includes a grid 15 and 25 respectively which maintains grid voltage from a grid voltage device 3.
  • rectifier 1 is intended to be ignited first and is series connected with an impedance in the form of a reactor 4.
  • the rectifier 2, which is intended to be ignited last, is not supplied with any series impedance.
  • the mercury arc rectifier 1 receives an ignition impulse and a current will grow up in it owing to the com-mutation voltage.
  • the rectifier 2 receives an ignition impulse and has then an ignition voltage corresponding to the voltage over rectifier 1 in series with its impedance 4, 5.
  • the impedance 4 must be so dimensioned that the voltage over it is suflicient to ignite the rectifier 2 at the right moment.
  • the current in rectifier 1 becomes constant, while the rest of the current is conducted by rectifier 2.
  • the rectifier 1 because of the inductance in the reactor 4 will retain its current practically unchanged until rectifier 2 is currentless.
  • rectifier 2 thus is currentless and only influenced by the voltage over the reactor 4, which gives a favourable deionisation of the rectifier 2.
  • the rectifier 1 With a connection as shown it may be desirable to let the last-ignited rectifier 2 take care of the greater part of the current, in which case the rectifier 1 only takes care of a little current and thereby preferably has the character of an auxiliary rectifier. Since, however, the rectifier 2 is not influenced by high voltages, during ignition or extinction, it is possible to load this rectifier relatively heavier than has been allowed for previously known connections, Where 'all the rectifiers must be capable of enduring full voltages during ignition and extinction. For the same reason an advantage is gained by constructing the voltage dividers 12, 13 and 22, 23 respectively with regard to their separate functions.
  • the idea of allowing one of the rectifiers to act as auxiliary rectifier may also be used with more than two rectifiers, in which case two or more of the later ignited rectifiers can be ignited simultaneously and then be supplied with impedances of the same size.
  • the advantage is still that only the first rectifier ignites with the full commutation voltage.
  • this can be parallel connected with a resistance, suitably a voltage-dependent resistance, a so-called varistor 5.
  • FIGURE 2 shows a further development of the arrangement according to FIGURE 1, where the impedance in the conductor to the first-ignited discharge path contains such a higher resistance that the discharge path is extinguished When the next parallel path ignites and thereby is connected in parallel with the first.
  • the discharge path 1 according to FIGURE 2 is thus a decided auxiliary rectifier, which only functions at ignition of the mercury arc rectifier connection.
  • the impedance in the conductor to rectifier 1 consists here for example quite simply of a relatively high ohmic resistance 8 and the terms are otherwise the same as in FIGURE 1.
  • Mercury arc rectifier connection comprising a pair of terminals, at least first and second parallel-connected unidirectional conducting discharge paths each connected between said terminals independently of the other discharge paths, and each provided with a grid control electrode; control means for said discharge paths; said grid control electrodes being connected to said control means; said control means including means for first delivering ignition pulses to the control electrode of said first discharge path and thereafter to the other control electrode; at least said first discharge path being connected in series with an impedance; said impedance being dimensioned in relation to the d sired current distribution between the different discharge paths; said control means including means to delay the ignition pulses to said other grid control electrodes according to said desired current distribution.
  • each of said discharge paths being provided with its own intermediate electrodes connected to a voltage divider for said discharge path; said voltage divider being dimensioned according to the operation conditions of said discharge path.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Generation Of Surge Voltage And Current (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Lasers (AREA)
US240004A 1962-02-15 1962-11-26 Mercury arc rectifier connection with parallel discharge paths Expired - Lifetime US3238417A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE165462 1962-02-15

Publications (1)

Publication Number Publication Date
US3238417A true US3238417A (en) 1966-03-01

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US240004A Expired - Lifetime US3238417A (en) 1962-02-15 1962-11-26 Mercury arc rectifier connection with parallel discharge paths

Country Status (4)

Country Link
US (1) US3238417A (enrdf_load_stackoverflow)
CH (1) CH422139A (enrdf_load_stackoverflow)
DE (1) DE1252324B (enrdf_load_stackoverflow)
GB (1) GB1025293A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863107A (en) * 1972-06-29 1975-01-28 Aga Ab Method and device for the striking of an arc in a reactor
US4575658A (en) * 1983-12-23 1986-03-11 Honeywell Inc. Power supply for a ring laser

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4631452A (en) * 1981-03-19 1986-12-23 Loughborough Consultants Limited Apparatus and method for generating a plurality of electric discharges

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2254703A (en) * 1938-02-23 1941-09-02 Gen Electric Electric valve control circuits
US2481468A (en) * 1943-08-12 1949-09-06 Nat Inv S Corp Luminescent tube system and apparatus
US2497166A (en) * 1944-06-06 1950-02-14 Stromberg Carlson Co Parallel circuit arrangement for power tubes
US2527211A (en) * 1950-10-24 Ignition system
US2549807A (en) * 1946-07-26 1951-04-24 Jack N Heed Inverter tube protective device
US2937318A (en) * 1958-10-27 1960-05-17 Baird Atomic Inc Counting tube read out system
US3014157A (en) * 1959-05-26 1961-12-19 Asea Ab Voltage dividers for high voltage gasfilled rectifiers
FR1296032A (fr) * 1961-05-04 1962-06-15 Forges Ateliers Const Electr Système de protection de redresseurs et d'onduleurs

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527211A (en) * 1950-10-24 Ignition system
US2254703A (en) * 1938-02-23 1941-09-02 Gen Electric Electric valve control circuits
US2481468A (en) * 1943-08-12 1949-09-06 Nat Inv S Corp Luminescent tube system and apparatus
US2497166A (en) * 1944-06-06 1950-02-14 Stromberg Carlson Co Parallel circuit arrangement for power tubes
US2549807A (en) * 1946-07-26 1951-04-24 Jack N Heed Inverter tube protective device
US2937318A (en) * 1958-10-27 1960-05-17 Baird Atomic Inc Counting tube read out system
US3014157A (en) * 1959-05-26 1961-12-19 Asea Ab Voltage dividers for high voltage gasfilled rectifiers
FR1296032A (fr) * 1961-05-04 1962-06-15 Forges Ateliers Const Electr Système de protection de redresseurs et d'onduleurs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863107A (en) * 1972-06-29 1975-01-28 Aga Ab Method and device for the striking of an arc in a reactor
US4575658A (en) * 1983-12-23 1986-03-11 Honeywell Inc. Power supply for a ring laser

Also Published As

Publication number Publication date
CH422139A (de) 1966-10-15
DE1252324B (enrdf_load_stackoverflow)
GB1025293A (en) 1966-04-06

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