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NO953608L - Method and apparatus for measuring power - Google Patents

Method and apparatus for measuring power

Info

Publication number
NO953608L
NO953608L NO953608A NO953608A NO953608L NO 953608 L NO953608 L NO 953608L NO 953608 A NO953608 A NO 953608A NO 953608 A NO953608 A NO 953608A NO 953608 L NO953608 L NO 953608L
Authority
NO
Norway
Prior art keywords
signals
proportional
signal
supply voltage
period
Prior art date
Application number
NO953608A
Other languages
Norwegian (no)
Other versions
NO953608D0 (en
Inventor
Kenneth Payne
David Alexander Watson
Roger Henry King
Original Assignee
Ampy Automation Digilog
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 Ampy Automation Digilog filed Critical Ampy Automation Digilog
Publication of NO953608D0 publication Critical patent/NO953608D0/en
Publication of NO953608L publication Critical patent/NO953608L/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/252—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with conversion of voltage or current into frequency and measuring of this frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Det er beskrevet et apparat for måling av elektrisk effekt, som er tilpasset for å frembringe et utgangssignal propor- sjonalt med produktet av en forsyningsspenning (3) og en strøm (1) som flyter gjennom en tilkoblet belastning. Et første signal (10) proporsjonalt med forsyningsspenningen (3) og et andre signal (9) proporsjonalt med belastningsstrømmen (1) utnyttes for å modulere perioden av to bærebølgesignaler av konstant frekvens. Tredje og fjerde signaler (38, 39) utledet fra de modulerte signaler overføres til en mikroprosessor (8), slik som via elektrisk isolerende innretninger (6, 7). Behandlingen av det tredje og fjerde signal kan innbefatte tellere (88) og generering av et klokkesignal av konstant frekvens. Gjennomsnittet av signalene kan bestemmes over en tidsperiode for å fremskaffe automatisk nulleffektkalibrering.An apparatus for measuring electrical power is described which is adapted to produce an output signal proportional to the product of a supply voltage (3) and a current (1) flowing through a connected load. A first signal (10) proportional to the supply voltage (3) and a second signal (9) proportional to the load current (1) are utilized to modulate the period of two constant frequency carrier signals. Third and fourth signals (38, 39) derived from the modulated signals are transmitted to a microprocessor (8), such as via electrically insulating devices (6, 7). The processing of the third and fourth signals may include counters (88) and generation of a constant frequency clock signal. The average of the signals can be determined over a period of time to provide automatic zero power calibration.

NO953608A 1993-03-13 1995-09-13 Method and apparatus for measuring power NO953608L (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9305232A GB2276012B (en) 1993-03-13 1993-03-13 Improved power meter
PCT/GB1994/000491 WO1994022023A1 (en) 1993-03-13 1994-03-11 Improved power meter

Publications (2)

Publication Number Publication Date
NO953608D0 NO953608D0 (en) 1995-09-13
NO953608L true NO953608L (en) 1995-09-13

Family

ID=10732050

Family Applications (1)

Application Number Title Priority Date Filing Date
NO953608A NO953608L (en) 1993-03-13 1995-09-13 Method and apparatus for measuring power

Country Status (9)

Country Link
EP (1) EP0688433A1 (en)
JP (1) JPH08507608A (en)
AU (1) AU679213B2 (en)
ES (1) ES2081273T1 (en)
FI (1) FI954296A7 (en)
GB (3) GB2285695B (en)
GR (1) GR960300001T1 (en)
NO (1) NO953608L (en)
WO (1) WO1994022023A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2285693B (en) * 1993-03-13 1997-05-21 Ampy Automation Digilog Power Measuring Methods
WO2004061462A1 (en) * 2002-12-23 2004-07-22 Power Measurement Ltd. Power monitoring integrated circuit with communication interface
CN103339807B (en) * 2011-02-04 2015-09-09 富士通株式会社 Power Strips and Power Measurement Methods
RU2589498C1 (en) * 2015-04-16 2016-07-10 федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" Counter for losses of active power in transformer
CN106569016A (en) * 2015-10-08 2017-04-19 陕西飞机工业（集团）有限公司 Aircraft automatic timing mechanism comprehensive detection device
CN107037390A (en) * 2017-02-10 2017-08-11 国网浙江台州市黄岩区供电公司 Impact load is to electric energy metering error remote monitoring of customer end
CN110244116B (en) * 2018-03-19 2024-04-26 深圳市航智精密电子有限公司 DC instantaneous power measurement circuit and quasi-synchronous calculation method
CN110968290B (en) * 2019-12-26 2025-05-09 深圳市锐能微科技有限公司 Four-quadrant multiplier and integrated circuit
CN117388570B (en) * 2023-12-12 2024-02-13 国网浙江省电力有限公司平阳县供电公司 DC electric energy meter and electric energy metering method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH551013A (en) * 1972-06-07 1974-06-28 Landis & Gyr Ag CIRCUIT ARRANGEMENT FOR PRODUCT FORMATION FROM VOLTAGE AND CURRENT FOR THE PURPOSE OF MEASURING ELECTRICAL ENERGY.
FR2551877B1 (en) * 1983-09-13 1986-01-31 Enertec ELECTRICAL ENERGY METER ESPECIALLY FOR VERY HIGH VOLTAGE
US4801874A (en) * 1987-02-27 1989-01-31 Process Systems, Inc. Method and apparatus for measuring electricity
JPH0821049B2 (en) * 1987-09-24 1996-03-04 株式会社東芝 Multiplier
GB2217027A (en) * 1988-04-05 1989-10-18 Omega Electric Ltd Active power measurement
GB9120011D0 (en) * 1991-09-19 1991-11-06 Ampy Automation Digilog Improvements in and relating to power meter
GB2287544B (en) * 1991-09-19 1996-04-03 Ampy Automation Digilog Voltage conversion method
GB2285693B (en) * 1993-03-13 1997-05-21 Ampy Automation Digilog Power Measuring Methods

Also Published As

Publication number Publication date
NO953608D0 (en) 1995-09-13
AU679213B2 (en) 1997-06-26
FI954296A0 (en) 1995-09-13
GR960300001T1 (en) 1996-02-29
JPH08507608A (en) 1996-08-13
FI954296L (en) 1995-09-13
GB2285695A (en) 1995-07-19
GB2276012B (en) 1997-05-21
GB9305232D0 (en) 1993-04-28
WO1994022023A1 (en) 1994-09-29
EP0688433A1 (en) 1995-12-27
GB9506332D0 (en) 1995-05-17
GB2285695B (en) 1997-05-21
ES2081273T1 (en) 1996-03-01
GB2285694B (en) 1997-05-21
GB9506333D0 (en) 1995-05-17
GB2276012A (en) 1994-09-14
GB2285694A (en) 1995-07-19
AU6212794A (en) 1994-10-11
FI954296A7 (en) 1995-09-13

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