GB1467447A - Inverters - Google Patents

Inverters

Info

Publication number
GB1467447A
GB1467447A GB810174A GB810174A GB1467447A GB 1467447 A GB1467447 A GB 1467447A GB 810174 A GB810174 A GB 810174A GB 810174 A GB810174 A GB 810174A GB 1467447 A GB1467447 A GB 1467447A
Authority
GB
United Kingdom
Prior art keywords
thyristors
capacitor
turned
thyristor
load
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
GB810174A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal Co Ltd
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 Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB810174A priority Critical patent/GB1467447A/en
Priority to DE19742421193 priority patent/DE2421193A1/en
Priority to FR7415336A priority patent/FR2228318A1/fr
Priority to IT6839574A priority patent/IT1014101B/en
Publication of GB1467447A publication Critical patent/GB1467447A/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
    • H02M7/5152—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 separate extinguishing means
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/4505—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only having a rectifier with controlled elements
    • 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
    • H02M7/5152—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 separate extinguishing means
    • H02M7/5155—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 separate extinguishing means wherein each commutation element has its own extinguishing means
    • 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
    • H02M7/517—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 special starting equipment

Landscapes

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

Abstract

1467447 Inverting WESTINGHOUSE BRAKE & SIGNAL CO Ltd 30 April 1974 [22 Feb 1974] 8101/74 Heading H2F An inverter comprises a single or polyphase bridge of thyristors 30 ... 33 for feeding a resonant load 37 ... 39 and has an auxiliary commutating circuit comprising a capacitor 40 in series with a bi-directional switching device 42, 43 connected across the A.C. side and a voltage-responsive control circuit 44 also connected across the A.C. side. Control circuit 44 arranged commutation by the auxiliary circuit 40 ... 43 when starting until the load 37 ... 39 is able to commutate naturally. As shown, components 40 ... 43 form the auxiliary commutating circuit for starting. Initially capacitor 40 is charged by means not shown. Rectifier 34 is first triggered at a small conduction angle and thyristors 30 and 32 (or an equivalent crowbar thyristor, not shown) triggered so as to build up a current in inductance 35. At a predetermined current level, thyristors 31 and 42 are turned on so that thyristor 30 is turned off and the current transferred to the path including thyristors 31, 42 and 32. Capacitor 40 will discharge and recharge with opposite polarity, transferring current to the primary of transformer 36 and turning off thyristor 42. This action will initiate a damped sinusoidal oscillation in the resonant induction heating load 37 ... 39. Just after the peak of the first half cycle, thyristors 30, 43 and 33 are turned on so that thyristors 31 and 32 are turned off by capacitor 40. This procedure is repeated with the thyristor groups 31, 42, 32 and 30, 43, 33 being alternately conducting at half cycles of the load oscillation. When the charge on capacitor 39 is sufficient for natural commutation of the inverter, or, after a predetermined time interval, the triggering of the auxiliary commutating thyristors 42 and 43 is discontinued. These thyristors may be replaced by a triac. Transformer 36 may be replaced by a series inductor.
GB810174A 1973-05-04 1974-02-22 Inverters Expired GB1467447A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB810174A GB1467447A (en) 1974-02-22 1974-02-22 Inverters
DE19742421193 DE2421193A1 (en) 1973-05-04 1974-05-02 INVERTER COMMUTATION CIRCUIT
FR7415336A FR2228318A1 (en) 1973-05-04 1974-05-03
IT6839574A IT1014101B (en) 1973-05-04 1974-05-03 CIRCUIT ARRANGEMENT FOR INVERTER SWITCHING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB810174A GB1467447A (en) 1974-02-22 1974-02-22 Inverters

Publications (1)

Publication Number Publication Date
GB1467447A true GB1467447A (en) 1977-03-16

Family

ID=9845782

Family Applications (1)

Application Number Title Priority Date Filing Date
GB810174A Expired GB1467447A (en) 1973-05-04 1974-02-22 Inverters

Country Status (1)

Country Link
GB (1) GB1467447A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465356A1 (en) * 1979-09-13 1981-03-20 Medar Inc FREQUENCY CONVERTER CIRCUIT AND METHOD FOR CONVERTING A PULSE CONTINUOUS THREE-PHASE ACTER CURRENT
FR2947681A1 (en) * 2009-07-01 2011-01-07 Air Liquide Welding France MULTINIVEAL ARC SWEEPER WITH SOFT SWITCH RESONANT

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465356A1 (en) * 1979-09-13 1981-03-20 Medar Inc FREQUENCY CONVERTER CIRCUIT AND METHOD FOR CONVERTING A PULSE CONTINUOUS THREE-PHASE ACTER CURRENT
FR2947681A1 (en) * 2009-07-01 2011-01-07 Air Liquide Welding France MULTINIVEAL ARC SWEEPER WITH SOFT SWITCH RESONANT
EP2288013A1 (en) * 2009-07-01 2011-02-23 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Arc welding station with a quasi-resonant soft-switching multi-level inverter

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee