EP0462314B1 - Circuit pour alimenter des charges mises à la terre avec courant indépendant de la charge - Google Patents

Circuit pour alimenter des charges mises à la terre avec courant indépendant de la charge Download PDF

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Publication number
EP0462314B1
EP0462314B1 EP90120362A EP90120362A EP0462314B1 EP 0462314 B1 EP0462314 B1 EP 0462314B1 EP 90120362 A EP90120362 A EP 90120362A EP 90120362 A EP90120362 A EP 90120362A EP 0462314 B1 EP0462314 B1 EP 0462314B1
Authority
EP
European Patent Office
Prior art keywords
load
voltage
circuit arrangement
independent current
earthed
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.)
Revoked
Application number
EP90120362A
Other languages
German (de)
English (en)
Other versions
EP0462314A3 (en
EP0462314A2 (fr
Inventor
Helmut Dr. Brock
Wolfgang Freitag
Reinhard Dr. Vogt
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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6393844&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0462314(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hartmann and Braun AG filed Critical Hartmann and Braun AG
Publication of EP0462314A2 publication Critical patent/EP0462314A2/fr
Publication of EP0462314A3 publication Critical patent/EP0462314A3/de
Application granted granted Critical
Publication of EP0462314B1 publication Critical patent/EP0462314B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices

Definitions

  • the invention relates to a circuit arrangement for supplying an earthed consumer with an impressed current representing a measured value according to the preamble of the claim.
  • DD PS 240 086 describes a circuit arrangement for supplying a consumer in accordance with the preamble of the claim.
  • the inputs of a control amplifier are supplied with the setpoint voltage forming a measured value and an actual value voltage, the actual value voltage being tapped at a current measuring resistor through which the impressed current flows.
  • FIG. 1 An arrangement known from "Semiconductor Circuit Technology", 1971, page 340 from Tietze / Schenk is shown in FIG. 1. It consists of a control amplifier with a differential stage 2 and a controllable current source 1. The control amplifier supplies an impressed current I which is dependent on a setpoint voltage 3 and flows through the load 5 of a consumer.
  • the circuit arrangement forms a control circuit in which the actual value voltage 7 is used at a current measuring resistor 4 as a feedback control variable. For consumers which are connected to earth 8 on one side, there is the problem that the actual value voltage 7 representing the measured value is superimposed by a common mode signal which can fluctuate over a wide voltage range.
  • the invention has for its object to design the circuit arrangement of the type mentioned in such a way that the reaction of the common mode voltage caused by the burden on the consumer to the control amplifier is minimized.
  • the object is achieved according to the invention in a circuit arrangement of the type mentioned at the outset with the measures specified in the characterizing part of the claim.
  • the principle of the floating reference point is used here.
  • the reference potential for the setpoint voltage and the control amplifier is adjusted so that it corresponds to the voltage drop across the consumer burden. Due to this virtual reference potential, the actual value voltage 7 is free of common mode via the measuring resistor for the control amplifier.
  • the floating power supply is realized by a voltage regulator, the reference potential of which is the voltage at the load of the consumer.
  • FIG. 2 shows the basic circuit diagram of an embodiment of the invention.
  • a differential stage 2 and a voltage-controlled current source 1 together form a control amplifier.
  • the control amplifier supplies an impressed current I which is dependent on a setpoint voltage 3 and which flows through the load 5 of a consumer and causes a voltage drop U there.
  • the consumer is connected to ground 8 on one side.
  • a current measuring resistor 4 is connected electrically in series with the burden 5.
  • the current I causes a voltage drop across the current measuring resistor 4, the actual value voltage 7, which is supplied to the non-inverting input of the differential stage 2.
  • the voltage U falling across the load 5 of the consumer is fed to the input of a high-impedance impedance converter 6 with the gain one.
  • the potential at the output of the impedance converter 6 at the switching point 9 is led to the inverting input of the differential stage 2 and it also serves as a reference potential for the setpoint voltage 3.
  • This circuit-technical measure has the effect that the potential at the switching point 9 for the closed control loop and the setpoint voltage 3 , which represents the respective measured value, corresponds to the voltage U at the load 5 of the consumer.
  • the potential at the node 9 is always tracked by the impedance converter 6 so that the differential voltage 2 of the actual value voltage 7 is not superimposed by common mode signals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Amplifiers (AREA)
  • Control Of Voltage And Current In General (AREA)

Claims (1)

  1. Dispositif de commande pour alimenter un utilisateur mis à la terre avec un courant (I) indépendant de la charge et représentant une valeur de mesure, comportant un amplificateur de réglage (1, 2), dont les entrées sont alimentées par une tension de valeur prescrite (3) formant la valeur de mesure, ainsi que par une tension de valeur effective (7), et comportant une résistance de mesure de courant (4) traversée par le courant (I) indépendant de la charge, sur laquelle est prélevée la tension de valeur effective (7),
    caractérisé en ce que la tension (U) tombant à la charge (5) de l'utilisateur est transmise à l'entrée d'un transformateur d'adaptation d'impédance (6) à haute impédance, et en ce que le potentiel (9) existant à la sortie du transformateur d'adaptation d'impédance (6) forme le potentiel de référence pour l'amplificateur de réglage (1, 2) et la tension de valeur prescrite (3).
EP90120362A 1989-11-20 1990-10-24 Circuit pour alimenter des charges mises à la terre avec courant indépendant de la charge Revoked EP0462314B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938460 1989-11-20
DE3938460A DE3938460C1 (fr) 1989-11-20 1989-11-20

Publications (3)

Publication Number Publication Date
EP0462314A2 EP0462314A2 (fr) 1991-12-27
EP0462314A3 EP0462314A3 (en) 1992-01-29
EP0462314B1 true EP0462314B1 (fr) 1994-09-28

Family

ID=6393844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120362A Revoked EP0462314B1 (fr) 1989-11-20 1990-10-24 Circuit pour alimenter des charges mises à la terre avec courant indépendant de la charge

Country Status (5)

Country Link
US (1) US5138248A (fr)
EP (1) EP0462314B1 (fr)
JP (1) JPH0612498B2 (fr)
CN (1) CN1025082C (fr)
DE (2) DE3938460C1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5604430A (en) * 1994-10-11 1997-02-18 Trw Inc. Solar array maximum power tracker with arcjet load
US6239997B1 (en) * 2000-09-01 2001-05-29 Ford Motor Company System for connecting and synchronizing a supplemental power source to a power grid
US6919650B2 (en) * 2002-05-31 2005-07-19 Ballard Power Systems Corporation Hybrid synchronization phase angle generation method
DE10257632B4 (de) * 2002-12-09 2005-03-03 Zentrum Mikroelektronik Dresden Ag Verfahren zur Signalausgabe durch AS-i-Transmitter in As-i Einheiten eines AS-i Bussystems
CN103294090A (zh) * 2013-05-24 2013-09-11 南京化工职业技术学院 直流信号发生器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546564A (en) * 1968-11-25 1970-12-08 Us Air Force Stabilized constant current apparatus
US3735240A (en) * 1971-10-15 1973-05-22 Motorola Inc Integrated circuit current regulator with differential amplifier control
JPS603098A (ja) * 1983-06-20 1985-01-09 株式会社日立製作所 電圧電流変換回路
DD240086A1 (de) * 1985-08-05 1986-10-15 Berlin Treptow Veb K Spannungs-strom-wandler
GB2182788B (en) * 1985-11-08 1989-12-28 Plessey Co Plc Voltage regulator circuit
DE3715886A1 (de) * 1987-05-13 1988-11-24 Philips Patentverwaltung Steuerbare konstantstromquelle
JP2710326B2 (ja) * 1988-01-31 1998-02-10 日本電気株式会社 駆動回路
DE3815979A1 (de) * 1988-05-10 1989-11-23 Philips Patentverwaltung Stromversorgungseinrichtung

Also Published As

Publication number Publication date
EP0462314A3 (en) 1992-01-29
JPH03175511A (ja) 1991-07-30
DE59007348D1 (de) 1994-11-03
US5138248A (en) 1992-08-11
CN1025082C (zh) 1994-06-15
DE3938460C1 (fr) 1991-02-07
CN1051990A (zh) 1991-06-05
EP0462314A2 (fr) 1991-12-27
JPH0612498B2 (ja) 1994-02-16

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