GB2283115A - Voltage measuring circuit - Google Patents

Voltage measuring circuit

Info

Publication number
GB2283115A
GB2283115A GB9423240A GB9423240A GB2283115A GB 2283115 A GB2283115 A GB 2283115A GB 9423240 A GB9423240 A GB 9423240A GB 9423240 A GB9423240 A GB 9423240A GB 2283115 A GB2283115 A GB 2283115A
Authority
GB
United Kingdom
Prior art keywords
voltage
measuring
measuring circuit
voltage measuring
switched
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.)
Granted
Application number
GB9423240A
Other versions
GB9423240D0 (en
GB2283115B (en
Inventor
Matti Tuominen
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.)
Nokia Oyj
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Publication of GB9423240D0 publication Critical patent/GB9423240D0/en
Publication of GB2283115A publication Critical patent/GB2283115A/en
Application granted granted Critical
Publication of GB2283115B publication Critical patent/GB2283115B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G01R15/183—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using transformers with a magnetic core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • G01R31/42—AC power supplies
    • 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
    • H02M3/33569—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 having several active switching elements
    • H02M3/33576—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer

Abstract

The invention relates to a voltage measuring circuit, especially for measuring the output voltage of a switched-mode power supply. According to the invention a first switching transistor (TR2) periodically switches the output voltage to a primary winding (W4) of a measuring transformer (T2). The induced secondary voltage of the transformer (T2) is rectified and switched to a control circuit by a second switching transistor (TR3). The first and second transistors are synchronized and exhibit a resistive voltage/current behaviour in a conducting state. <IMAGE>
GB9423240A 1992-05-21 1993-05-19 Voltage measuring circuit Expired - Fee Related GB2283115B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI922315A FI94686C (en) 1992-05-21 1992-05-21 The voltage measuring circuit
PCT/FI1993/000210 WO1993023915A1 (en) 1992-05-21 1993-05-19 Voltage measuring circuit

Publications (3)

Publication Number Publication Date
GB9423240D0 GB9423240D0 (en) 1995-02-15
GB2283115A true GB2283115A (en) 1995-04-26
GB2283115B GB2283115B (en) 1996-04-17

Family

ID=8535329

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9423240A Expired - Fee Related GB2283115B (en) 1992-05-21 1993-05-19 Voltage measuring circuit

Country Status (6)

Country Link
AU (1) AU4071093A (en)
DE (1) DE4392104T1 (en)
FI (1) FI94686C (en)
GB (1) GB2283115B (en)
SE (1) SE511049C2 (en)
WO (1) WO1993023915A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4269515B2 (en) * 2000-12-25 2009-05-27 パナソニック電工株式会社 Electric quantity detection sensor
DE102005015942A1 (en) * 2005-04-07 2006-10-12 Abb Patent Gmbh Device for supplying power to measuring sensors and transmitting a synchronous clock signal to them
US8929053B2 (en) * 2010-09-13 2015-01-06 William Henry Morong Direct-current current transformer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495554A (en) * 1983-03-28 1985-01-22 International Business Machines Corporation Isolated power supply feedback
GB2153113A (en) * 1984-01-20 1985-08-14 Westinghouse Electric Corp DC-DC converter
US4709315A (en) * 1986-11-24 1987-11-24 Rockwell International Corporation Isolated controller circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495554A (en) * 1983-03-28 1985-01-22 International Business Machines Corporation Isolated power supply feedback
GB2153113A (en) * 1984-01-20 1985-08-14 Westinghouse Electric Corp DC-DC converter
US4709315A (en) * 1986-11-24 1987-11-24 Rockwell International Corporation Isolated controller circuit

Also Published As

Publication number Publication date
GB9423240D0 (en) 1995-02-15
SE9403984L (en) 1994-11-17
FI94686B (en) 1995-06-30
FI922315A0 (en) 1992-05-21
WO1993023915A1 (en) 1993-11-25
FI94686C (en) 1995-10-10
SE9403984D0 (en) 1994-11-17
SE511049C2 (en) 1999-07-26
FI922315A (en) 1993-11-22
DE4392104T1 (en) 1995-05-11
GB2283115B (en) 1996-04-17
AU4071093A (en) 1993-12-13

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110519