CA1077568A - Electric power to dc signal converter - Google Patents

Electric power to dc signal converter

Info

Publication number
CA1077568A
CA1077568A CA290,461A CA290461A CA1077568A CA 1077568 A CA1077568 A CA 1077568A CA 290461 A CA290461 A CA 290461A CA 1077568 A CA1077568 A CA 1077568A
Authority
CA
Canada
Prior art keywords
pulse
output
width modulator
voltage
analog switch
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
CA290,461A
Other languages
English (en)
French (fr)
Inventor
Eiji Hayashi
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Works Ltd
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 Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Works Ltd
Application granted granted Critical
Publication of CA1077568A publication Critical patent/CA1077568A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00Arrangements for measuring electric power or power factor
    • G01R21/127Arrangements for measuring electric power or power factor by using pulse modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dc-Dc Converters (AREA)
  • Amplitude Modulation (AREA)
  • Analogue/Digital Conversion (AREA)
CA290,461A 1976-11-12 1977-11-08 Electric power to dc signal converter Expired CA1077568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13605676A JPS5360675A (en) 1976-11-12 1976-11-12 Converter for power and dc signal

Publications (1)

Publication Number Publication Date
CA1077568A true CA1077568A (en) 1980-05-13

Family

ID=15166145

Family Applications (1)

Application Number Title Priority Date Filing Date
CA290,461A Expired CA1077568A (en) 1976-11-12 1977-11-08 Electric power to dc signal converter

Country Status (5)

Country Link
US (1) US4145652A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5360675A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1077568A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1588053A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
MX (1) MX143345A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451784A (en) * 1981-10-15 1984-05-29 General Electric Company Electronic watt transducer circuit with constant DC current output proportional to watts
JPS6150070A (ja) * 1985-07-05 1986-03-12 Toshiba Corp 電力量計
US4801874A (en) * 1987-02-27 1989-01-31 Process Systems, Inc. Method and apparatus for measuring electricity
KR960039664A (ko) * 1995-04-12 1996-11-25 이대원 반송파 동기신호에 의한 귀환형 펄스 폭 변조 적분 방식의 펄스폭 제어 장치

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH472677A (de) * 1968-10-18 1969-05-15 Landis & Gyr Ag Schaltungsanordnung zur Messung elektrischer Energie
USRE29079E (en) 1970-01-27 1976-12-14 Motor Finance Corporation Multiplier, divider and wattmeter using a switching circuit and a pulse-width and frequency modulator
US3818340A (en) * 1971-03-26 1974-06-18 Yokogawa Electric Works Ltd Electronic watt-hour meter with digital output representing time-integrated input
DE2348667B2 (de) * 1973-09-27 1975-08-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektronischer kWh-Zähler
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
US3976942A (en) * 1974-12-13 1976-08-24 Esterline Corporation Watt/watt hour transducer having current signals and a modulator therefor
US4055803A (en) * 1976-09-27 1977-10-25 Kraley Raymond L Combined watt and var transducer

Also Published As

Publication number Publication date
US4145652A (en) 1979-03-20
GB1588053A (en) 1981-04-15
JPS5360675A (en) 1978-05-31
MX143345A (es) 1981-04-15
JPS5514384B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1980-04-16

Similar Documents

Publication Publication Date Title
US4099227A (en) Sensor circuit
US4495463A (en) Electronic watt and/or watthour measuring circuit having active load terminated current sensor for sensing current and providing automatic zero-offset of current sensor DC offset error potentials
KR0122844B1 (ko) 광범위한 동적 전류 측정 장치
US4777579A (en) Integrated current sensor configurations for AC motor drives
US4074175A (en) Inductive load current measuring circuit
US4658323A (en) RMS calculation circuit for digital circuit interrupters
CA2051143A1 (en) Inverter control device
DE69416874T2 (de) Verfahren und vorrichtung zur annäherung des effektivwertes des stromes
US4749941A (en) Circuit arrangement for a meter for measuring two electrical quantities
CA1077568A (en) Electric power to dc signal converter
US4119893A (en) Circuit for forming an electrical quantity which is proportional to a flux component in a rotating field machine
US4055803A (en) Combined watt and var transducer
US4796148A (en) Current-sensing arrangement utilizing two current-sensing signals
US4741002A (en) RMS calculation circuit
JPH0714252B2 (ja) 回路しゃ断器
CA2168159A1 (en) Electrical apparatus with wide dynamic range for monitoring and protecting electric power systems
KR810000917B1 (ko) 전력 · 직류신호 변환기
US4092590A (en) Electronic three-phase four-wire system watt-hour meter
CA1078921A (en) Inverter control system
RU204057U1 (ru) Устройство восстановления приведённых первичных токов трансформаторов тока, соединённых в схему "звезда"
JP3279215B2 (ja) 電力系統の地絡検出方法
JPS625665Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
Ohnuki et al. A three‐phase, active power filter with a predictive‐instantaneous‐current PWM controller
US4608626A (en) Electrical inverter with minority pole current limiting
JP2893763B2 (ja) 電力トランスデューサ

Legal Events

Date Code Title Description
MKEX Expiry