GB1394815A - Dc-to-dc converters - Google Patents

Dc-to-dc converters

Info

Publication number
GB1394815A
GB1394815A GB5845370A GB5845370A GB1394815A GB 1394815 A GB1394815 A GB 1394815A GB 5845370 A GB5845370 A GB 5845370A GB 5845370 A GB5845370 A GB 5845370A GB 1394815 A GB1394815 A GB 1394815A
Authority
GB
United Kingdom
Prior art keywords
terminals
output
circuit
voltage
megohms
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
GB5845370A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB5845370A priority Critical patent/GB1394815A/en
Publication of GB1394815A publication Critical patent/GB1394815A/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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
    • H02M3/3385—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement with automatic control of output voltage or current

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

1394815 Measuring resistance GENERAL ELECTRIC CO Ltd 9 June 1972 58453/70 Heading G1U [Also in Divisions G3 and H2] An insulation tester employs a DC-DC converter having automatic current limitation (see Division H2). As described, an oscillator comprising transistor 6 and transformer 1 is supplied from a 1-3 volt battery at terminals 5, 7, the output of the oscillator being rectified at 11 to provide 550V between terminals 12 and 13. This voltage is supplied to an insulation measuring circuit comprising a moving-coil meter 45 calibrated in megohms and feeding test terminals 46, 13. The voltage across terminals 12, 13 is stabilized for currents corresponding to insulating resistance greater than 0.5 megohms by action of components 34, 24, 22, 17. The scale at the low resistance end is arranged to be cramped by means of a current limiting circuit in which the output current is monitored by resistors 35, 36 and fed a diode 37 so as to reduce the output voltage under these conditions. Capacitor 39 prevents damage to the circuit if the test terminals 46, 13 are inadvertently connected to the mains supply. Lower resistance ranges are obtained by using lower voltages across terminals 7, 21 and 7, 42. Alternatively a floating circuit may be provided by rectifying the output of a floating winding (not shown).
GB5845370A 1972-06-09 1972-06-09 Dc-to-dc converters Expired GB1394815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5845370A GB1394815A (en) 1972-06-09 1972-06-09 Dc-to-dc converters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5845370A GB1394815A (en) 1972-06-09 1972-06-09 Dc-to-dc converters

Publications (1)

Publication Number Publication Date
GB1394815A true GB1394815A (en) 1975-05-21

Family

ID=10481657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5845370A Expired GB1394815A (en) 1972-06-09 1972-06-09 Dc-to-dc converters

Country Status (1)

Country Link
GB (1) GB1394815A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2228152A (en) * 1989-01-26 1990-08-15 Mitsubishi Electric Corp Power supply apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2228152A (en) * 1989-01-26 1990-08-15 Mitsubishi Electric Corp Power supply apparatus
GB2228152B (en) * 1989-01-26 1993-03-03 Mitsubishi Electric Corp Power supply apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee