SE8504813L - ZERO COMPENSATION SYSTEM AND METHOD - Google Patents

ZERO COMPENSATION SYSTEM AND METHOD

Info

Publication number
SE8504813L
SE8504813L SE8504813A SE8504813A SE8504813L SE 8504813 L SE8504813 L SE 8504813L SE 8504813 A SE8504813 A SE 8504813A SE 8504813 A SE8504813 A SE 8504813A SE 8504813 L SE8504813 L SE 8504813L
Authority
SE
Sweden
Prior art keywords
voltage
vars
metering
signal
output
Prior art date
Application number
SE8504813A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE453129B (en
SE8504813D0 (en
Inventor
M A Robinton
A H Starkie
Original Assignee
Robinton Prod Inc
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
Priority claimed from US06/518,820 external-priority patent/US4542354A/en
Priority claimed from US06/518,832 external-priority patent/US4573037A/en
Priority claimed from US06/543,095 external-priority patent/US4709375A/en
Application filed by Robinton Prod Inc filed Critical Robinton Prod Inc
Publication of SE8504813D0 publication Critical patent/SE8504813D0/en
Publication of SE8504813L publication Critical patent/SE8504813L/en
Publication of SE453129B publication Critical patent/SE453129B/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Analogue/Digital Conversion (AREA)
  • Amplifiers (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Amplitude Modulation (AREA)

Abstract

The metering system and method provides an electronic power meter for simultaneously producing digital pulse trains proportional to power and to VARS or Q. In the preferred embodiment, the metering system employs delta-minus-sigma modulation of the voltage signal which produces a modulated output signal used for gating the analog current signal, multiplying voltage and current. The product of voltage and current is then supplied to another delta-minus-sigma modulator (90), which serves as a convertor outputting a pulse train. The converter (90) produces separate pulse trains for each polarity of the power being measured. VARS or Q readings are produced by delaying the output of the modulator (30) by a selected amount to produce the necessary voltage lag, after which the delayed modulated signal is supplied to another multiplying gate. A second converter (90) is used to output VARS and Q. A metering method is also disclosed, as well as an offset compensation system (70, C1) for use with metering systems.
SE8504813A 1983-08-01 1985-10-16 METHOD AND DEVICE FOR ZERO ERROR COMPENSATION AND USE OF IT SE453129B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US06/518,820 US4542354A (en) 1983-08-01 1983-08-01 Delta-sigma pulse modulator with offset compensation
US06/518,832 US4573037A (en) 1983-08-01 1983-08-01 Analog-to digital converter and method
US53655883A 1983-09-27 1983-09-27
US06/543,095 US4709375A (en) 1983-09-27 1983-10-18 Digital phase selection system for signal multipliers

Publications (3)

Publication Number Publication Date
SE8504813D0 SE8504813D0 (en) 1985-10-16
SE8504813L true SE8504813L (en) 1985-10-16
SE453129B SE453129B (en) 1988-01-11

Family

ID=27504546

Family Applications (5)

Application Number Title Priority Date Filing Date
SE8501603A SE452516B (en) 1983-08-01 1985-04-01 METHOD AND DEVICE FOR META ELECTRIC EFFECT TRANSFER IN A CONDUCT
SE8504816A SE8504816D0 (en) 1983-08-01 1985-10-16 BODY TO ADAPT THE PHASE CONDITION AND MAKE A PRODUCT SIGNAL
SE8504815A SE8504815D0 (en) 1983-08-01 1985-10-16 SYSTEM FOR USING DIGITAL SIGNALS
SE8504814A SE8504814L (en) 1983-08-01 1985-10-16 MODULATOR
SE8504813A SE453129B (en) 1983-08-01 1985-10-16 METHOD AND DEVICE FOR ZERO ERROR COMPENSATION AND USE OF IT

Family Applications Before (4)

Application Number Title Priority Date Filing Date
SE8501603A SE452516B (en) 1983-08-01 1985-04-01 METHOD AND DEVICE FOR META ELECTRIC EFFECT TRANSFER IN A CONDUCT
SE8504816A SE8504816D0 (en) 1983-08-01 1985-10-16 BODY TO ADAPT THE PHASE CONDITION AND MAKE A PRODUCT SIGNAL
SE8504815A SE8504815D0 (en) 1983-08-01 1985-10-16 SYSTEM FOR USING DIGITAL SIGNALS
SE8504814A SE8504814L (en) 1983-08-01 1985-10-16 MODULATOR

Country Status (9)

Country Link
CA (1) CA1253968A (en)
CH (1) CH672847A5 (en)
DE (5) DE3448182C2 (en)
FR (4) FR2555318B1 (en)
GB (5) GB2154329B (en)
IT (1) IT1176528B (en)
NL (1) NL8420205A (en)
SE (5) SE452516B (en)
WO (1) WO1985000711A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0240102A3 (en) * 1986-03-31 1988-07-27 Robinton Products Inc. Power meter having self-test function
DE3772501D1 (en) * 1986-09-19 1991-10-02 Siemens Ag ELECTRONIC ELECTRICITY METER.
US4951052A (en) * 1989-07-10 1990-08-21 General Electric Company Correction of systematic error in an oversampled analog-to-digital converter
US5200752A (en) * 1991-07-18 1993-04-06 Hewlett-Packard Company Integrating analog to digital converter run-up method and system
DE9406292U1 (en) * 1993-12-09 1994-06-16 Siemens AG, 80333 München Terminal block for an electrical device
DE19630605A1 (en) * 1996-07-29 1998-02-05 Tech Gmbh Antriebstechnik Und Multiplication circuit for power measuring device
EP0942271A1 (en) * 1998-03-10 1999-09-15 Oxford Instruments (Uk) Limited Improvements in resistance thermometry
DE19938779B4 (en) * 1999-08-16 2007-06-21 Siemens Ag Circuit and method for determining the offset error in an offset error-prone measurement of the coil current of an electromagnetic actuator

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US3461406A (en) * 1966-07-05 1969-08-12 Motorola Inc Delta modulator using operational integration
US3470471A (en) * 1968-05-31 1969-09-30 Canadian Patents Dev Polarity coincidence correlation method and apparatus for measuring electrical energy
US3895376A (en) 1971-10-26 1975-07-15 Iwatsu Electric Co Ltd Dual slope integrating analog to digital converter
US3794917A (en) * 1972-03-09 1974-02-26 Esterline Corp Electronic watt transducer
US3859654A (en) * 1972-10-11 1975-01-07 Ibm Analog to digital converter for electrical signals
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US3875508A (en) * 1973-09-07 1975-04-01 Gen Electric Metering electrical energy (kWh) in single phase systems
DE2348667B2 (en) * 1973-09-27 1975-08-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen Electronic kWh counter
US3914591A (en) * 1974-04-19 1975-10-21 Bell Telephone Labor Inc Analog electronic multiplier
US3942110A (en) * 1974-05-08 1976-03-02 General Electric Company Analog to pulse rate converter
US3955138A (en) * 1974-11-06 1976-05-04 General Electric Company Electronic energy consumption meter with input transformer having single resistance terminated secondary winding coupled to C-MOS switches driven by pulse width modulated control signals
US4009475A (en) * 1974-12-05 1977-02-22 Hybrid Systems Corporation Delta-sigma converter and decoder
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US4217545A (en) * 1975-06-20 1980-08-12 Nihon Denki Keiki Kenteisho Electronic type polyphase electric energy meter
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JPS535678A (en) * 1976-07-03 1978-01-19 Shoei Denki Kk Device for measuring active and reactive components of aac current or power
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Also Published As

Publication number Publication date
SE8504814D0 (en) 1985-10-16
GB8620426D0 (en) 1986-10-01
SE8504815L (en) 1985-10-16
SE453129B (en) 1988-01-11
CA1253968A (en) 1989-05-09
GB2178260B (en) 1988-05-05
GB2178261B (en) 1988-05-05
GB8620427D0 (en) 1986-10-01
FR2555382A1 (en) 1985-05-24
DE3490349T1 (en) 1985-09-19
IT1176528B (en) 1987-08-18
GB2154329A (en) 1985-09-04
GB8507289D0 (en) 1985-05-01
SE8501603D0 (en) 1985-04-01
GB2178545B (en) 1988-05-05
GB8620428D0 (en) 1986-10-01
SE8501603L (en) 1985-04-01
SE8504814L (en) 1985-10-16
CH672847A5 (en) 1989-12-29
DE3448182C2 (en) 1988-09-29
WO1985000711A1 (en) 1985-02-14
NL8420205A (en) 1985-06-03
SE8504816L (en) 1985-10-16
SE8504813D0 (en) 1985-10-16
GB2178545A (en) 1987-02-11
FR2555318A1 (en) 1985-05-24
DE3448184C2 (en) 1989-11-23
FR2555318B1 (en) 1989-03-03
DE3448183C2 (en) 1988-07-21
GB8620429D0 (en) 1986-10-01
DE3448185C2 (en) 1988-03-24
SE8504816D0 (en) 1985-10-16
GB2178177A (en) 1987-02-04
SE8504815D0 (en) 1985-10-16
GB2178260A (en) 1987-02-04
FR2555381A1 (en) 1985-05-24
SE452516B (en) 1987-11-30
FR2555379A1 (en) 1985-05-24
GB2178261A (en) 1987-02-04
GB2154329B (en) 1988-05-05
IT8422167A0 (en) 1984-08-01
GB2178177B (en) 1988-05-05

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