GB1290810A - - Google Patents

Info

Publication number
GB1290810A
GB1290810A GB1290810DA GB1290810A GB 1290810 A GB1290810 A GB 1290810A GB 1290810D A GB1290810D A GB 1290810DA GB 1290810 A GB1290810 A GB 1290810A
Authority
GB
United Kingdom
Prior art keywords
rectifier
inverter
capacitor
contacts
relay
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 GB1290810A publication Critical patent/GB1290810A/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
    • 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

Abstract

1290810 Starting inverters CANADIAN GENERAL ELECTRIC CO Ltd 28 June 1971 30132/71 Heading H2F In a frequency changer comprising an inverter 11 supplied by a rectifier 10, excessive starting current is reduced by charging a capacitor 17 connected across the D.C. side of the inverter 11 via resistance 21 from an auxiliary source 25 of higher voltage than the output of rectifier 10. When capacitor 17 is charged approximately to the voltage of rectifier 10, the inverter 11 is supplied from the output of rectifier 10 and the auxiliary supply 25 disconnected. As described, the inverter 11 is started by closing circuit breaker 20, energizing relay A, contacts Al of which commence charging capacitor 17 via resistor 21. When capacitor 17 is charged to slightly greater than the output of rectifier 10, relay B is energized via diode 27, energizing relay C, contacts C2 of which supply the inverter from the rectifier 10 while contacts C1 release relay A and so disconnect the auxiliary supply 25. The invention prevents excess current due to initial saturation of the transformer 14.
GB1290810D 1971-06-28 1971-06-28 Expired GB1290810A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3013271 1971-06-28

Publications (1)

Publication Number Publication Date
GB1290810A true GB1290810A (en) 1972-09-27

Family

ID=10302820

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1290810D Expired GB1290810A (en) 1971-06-28 1971-06-28

Country Status (1)

Country Link
GB (1) GB1290810A (en)

Cited By (1)

* 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

Cited By (1)

* 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

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees