EP0462314A2 - 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 PDFInfo
- Publication number
- EP0462314A2 EP0462314A2 EP90120362A EP90120362A EP0462314A2 EP 0462314 A2 EP0462314 A2 EP 0462314A2 EP 90120362 A EP90120362 A EP 90120362A EP 90120362 A EP90120362 A EP 90120362A EP 0462314 A2 EP0462314 A2 EP 0462314A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- load
- circuit arrangement
- earthed
- consumer
- 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
Links
Images
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 a circuit arrangement for supplying a consumer is described according to the preamble of the claim.
- the setpoint value voltage forming a measured value and an actual value voltage are fed to the inputs of a control amplifier, 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 by 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.
- This virtual reference potential means that 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 fed 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 the 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)
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 true EP0462314A2 (fr) | 1991-12-27 |
EP0462314A3 EP0462314A3 (en) | 1992-01-29 |
EP0462314B1 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) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (4)
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 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD240086A1 (de) * | 1985-08-05 | 1986-10-15 | Berlin Treptow Veb K | Spannungs-strom-wandler |
GB2182788A (en) * | 1985-11-08 | 1987-05-20 | Plessey Co Plc | Voltage regulator circuit |
Family Cites Families (6)
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 |
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 |
-
1989
- 1989-11-20 DE DE3938460A patent/DE3938460C1/de not_active Expired - Lifetime
-
1990
- 1990-10-24 EP EP90120362A patent/EP0462314B1/fr not_active Revoked
- 1990-10-24 DE DE59007348T patent/DE59007348D1/de not_active Revoked
- 1990-11-12 CN CN90109078A patent/CN1025082C/zh not_active Expired - Fee Related
- 1990-11-15 US US07/614,617 patent/US5138248A/en not_active Expired - Fee Related
- 1990-11-20 JP JP2312994A patent/JPH0612498B2/ja not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD240086A1 (de) * | 1985-08-05 | 1986-10-15 | Berlin Treptow Veb K | Spannungs-strom-wandler |
GB2182788A (en) * | 1985-11-08 | 1987-05-20 | Plessey Co Plc | Voltage regulator circuit |
Non-Patent Citations (1)
Title |
---|
TIETZE & SCHENK 'HALBLEITER-SCHALTUNGSTECHNIK' 1980 , SPRINGER-VERLAG , BERLIN DE * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Also Published As
Publication number | Publication date |
---|---|
EP0462314A3 (en) | 1992-01-29 |
JPH03175511A (ja) | 1991-07-30 |
EP0462314B1 (fr) | 1994-09-28 |
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 |
JPH0612498B2 (ja) | 1994-02-16 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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