EP1842120A1 - Device for smoothing a current supplied to a consumer - Google Patents

Device for smoothing a current supplied to a consumer

Info

Publication number
EP1842120A1
EP1842120A1 EP06706245A EP06706245A EP1842120A1 EP 1842120 A1 EP1842120 A1 EP 1842120A1 EP 06706245 A EP06706245 A EP 06706245A EP 06706245 A EP06706245 A EP 06706245A EP 1842120 A1 EP1842120 A1 EP 1842120A1
Authority
EP
European Patent Office
Prior art keywords
current
consumer
maximum value
load
voltage
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
Application number
EP06706245A
Other languages
German (de)
French (fr)
Other versions
EP1842120B1 (en
Inventor
Reinhard Ritschel
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.)
Rohde and Schwarz GmbH and Co KG
Original Assignee
Rohde and Schwarz GmbH and Co KG
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 Rohde and Schwarz GmbH and Co KG filed Critical Rohde and Schwarz GmbH and Co KG
Publication of EP1842120A1 publication Critical patent/EP1842120A1/en
Application granted granted Critical
Publication of EP1842120B1 publication Critical patent/EP1842120B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • G05F1/613—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in parallel with the load as final control devices

Definitions

  • the invention relates to an arrangement according to the preamble of the main claim.
  • the compensation current generated by the current sink is not obtained by regulation but by control.
  • Such an arrangement is therefore very fast and stable and adapts independently also relatively fast load current changes.
  • Fig. 1 is a schematic diagram of an embodiment of the inventive arrangement.
  • the invention shows an arrangement according to the invention for smoothing the consumer direct current I supplied to a consumer R 1 by means of a controllable current sink C connected in parallel to the consumer R 1 .
  • This voltage-controlled current sink C is in principle a controlled consumer. It is realized in modern circuit technology preferably by controllable transistors combined with corresponding resistors.
  • the total consumer current I 7 which is supplied from a DC source, not shown, the load R 1 , is composed of the sum of the load R 1 supplied to the load I 1 and the current flowing through the current sink C compensation current I c _
  • the load current I 1 by means of a Current / voltage converter W converted into a proportional measurement voltage U 1 .
  • the converter W is, for example, a shunt arranged in the consumer power circuit.
  • the maximum value U lp of the measuring voltage U 1 is determined and in a voltage adder A, the difference between the maximum value U lp and instantaneous value ⁇ is determined.
  • the filter effect of the arrangement according to the invention is determined by the accuracy of the measurement of the load current I 1 as well the control accuracy of the current sink C determined.
  • the response and discharge time of the peak value rectifier S and the average value of the obtained through this peak value rectifier maximum value of the measuring voltage and the derivative of the instantaneous value U 1 of proportional to the load current measuring voltage are dimensioned such that for a predetermined load current profile I 1 an optimum with respect to filtering effect and power loss in the current sink C results.
  • the current compensation circuit is also associated with a non-illustrated switching device through which the compensation current I c is switched on and off together with the consumer R 1 .
  • the peak compensation current I c is set.
  • a corresponding voltage limiter is connected in parallel with the charging capacitor of the peak value rectifier S.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Rectifiers (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Dc-Dc Converters (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

The invention relates to smoothing a consumer (R1) electrical circuit (I) supplied by a controllable current sink (c) connected in parallel to the consumer (R1). For this purpose, measuring voltage (U1) proportional to a load current (I1) supplied to the consumer (R1) is derived therefrom. A pick value measuring device (S) makes it possible to determine a maximum value thereof (U1p). The difference between the maximum value and measuring voltage (U1p - U1) makes it possible to controll the voltage-controlled current sink (c) in such a way that the sum of a compensation current (Ic) supplied by the current sink (c) and the load current (I1) which runs by the consumer is substantially constant.

Description

Anordnung zum Glätten des einem Verbraucher zugeführten Arrangement for smoothing the consumer supplied
Verbraucherstromesload current
Die Erfindung betrifft eine Anordnung laut Oberbegriff des Hauptanspruches .The invention relates to an arrangement according to the preamble of the main claim.
Bei elektronischen Geräten mit im Stromverbrauch stark schwankenden Schaltungen ist es oftmals erforderlich, den aus einer Gleichstromquelle zugeführten Verbraucherstrom zu glätten . Die Verwendung von üblichen LC-Filtern mit großen Glättungskondensatoren scheidet dabei aus Platzmangel oftmals aus . Es ist zwar schon bekannt , zum Glätten eines pulsierenden Versorgungsgleichstromes parallel zum Verbraucher eine steuerbare Stromsenke zu schalten, den sich aus Summe von Verbraucherstrom und Kompensationsstrom ergebenden Eingangs-Gesamtstrom zu messen und mit einem vorgegebenen Sollwert zu vergleichen und in Abhängigkeit davon über die Stromsenke den Kompensationsstrom so zu regeln, dass der Versorgungsstrom im Wesentlichen konstant bleibt . Dieser bekannte Regelkreis ist jedoch relativ aufwendig, oftmals nicht schnell genug und auch unstabil und neigt zum Schwingen .In electronic devices with heavily fluctuating power consumption circuits, it is often necessary to smooth the load current supplied from a DC power source. The use of conventional LC filters with large smoothing capacitors is often eliminated due to lack of space. It is already known, for smoothing a pulsating DC supply current parallel to the consumer to switch a controllable current sink to measure the sum of the load current and compensation current resulting total input current and compare with a predetermined setpoint and depending on the current sink the compensation current to regulate so that the supply current remains substantially constant. However, this known control loop is relatively expensive, often not fast enough and also unstable and tends to oscillate.
Es ist daher Aufgabe der Erfindung, eine Anordnung zum Glätten des einem Verbraucher zugeführten Verbraucherstroms zu schaffen, die trotz geringem Platzbedarfes die Nachteile einer Kompensationsstrom- Regelung vermeidet .It is therefore an object of the invention to provide a device for smoothing the load current supplied to a consumer, which avoids the disadvantages of a compensation current control despite low space requirement.
Diese Aufgabe wird ausgehend von einer Anordnung laut Oberbegriff des Hauptanspruches durch dessen kennzeichnende Merkmale gelöst . Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.This object is achieved on the basis of an arrangement according to the preamble of the main claim by its characterizing features. Advantageous developments emerge from the subclaims.
Bei der erfindungsgemäßen Anordnung wird der durch die Stromsenke erzeugte Kompensationsstrom nicht durch Regelung sondern durch Steuerung gewonnen . Eine solche Anordnung ist daher sehr schnell und stabil und passt sich selbstständig auch relativ schnellen Laststroraänderungen an.In the arrangement according to the invention, the compensation current generated by the current sink is not obtained by regulation but by control. Such an arrangement is therefore very fast and stable and adapts independently also relatively fast load current changes.
Die Erfindung wird im Folgenden anhand eines Prinzipschaltbildes an einem Ausführungsbeispiel näher erläutert . In der Zeichnung zeigt :The invention will be explained in more detail below with reference to a schematic diagram of an embodiment. In the drawing shows:
Fig. 1 ein Prinzipschaltbild eines Ausführungsbeispiels der erfindungsgemäßen Anordnung .Fig. 1 is a schematic diagram of an embodiment of the inventive arrangement.
Die Erfindung zeigt eine erfindungsgemäße Anordnung zum Glätten des einem Verbraucher R1 zugeführten Verbraucher- Gleichstromes I mittels einer dem Verbraucher R1 parallel geschalteten steuerbaren Stromsenke C .The invention shows an arrangement according to the invention for smoothing the consumer direct current I supplied to a consumer R 1 by means of a controllable current sink C connected in parallel to the consumer R 1 .
Diese spannungsgesteuerte Stromsenke C ist im Prinzip ein gesteuerter Verbraucher . Sie wird in moderner Schaltungstechnik vorzugsweise durch steuerbare Transistoren kombiniert mit entsprechenden Widerständen realisiert . Der Gesamtverbraucherstrom I 7 der aus einer nicht dargestellten Gleichstromquelle der Last R1 zugeführt wird, setzt sich zusammen aus der Summe des dem Verbraucher R1 zugeführten Laststromes I1 sowie des durch die Stromsenke C fließenden Kompensationsstromes Ic_ Der Laststrom I1 wird mittels eines Strom/Spannungs-Wandlers W in eine proportionale Messspannung U1 umgesetzt . Der Wandler W ist beispielsweise ein im VerbraucherStromkreis angeordneter Shunt .This voltage-controlled current sink C is in principle a controlled consumer. It is realized in modern circuit technology preferably by controllable transistors combined with corresponding resistors. The total consumer current I 7 which is supplied from a DC source, not shown, the load R 1 , is composed of the sum of the load R 1 supplied to the load I 1 and the current flowing through the current sink C compensation current I c _ The load current I 1 by means of a Current / voltage converter W converted into a proportional measurement voltage U 1 . The converter W is, for example, a shunt arranged in the consumer power circuit.
Mittels eines Spitzenwertgleichrichters S wird der Maximalwert Ulp der MessSpannung U1 bestimmt und in einem Spannungsaddierer A wird die Differenz zwischen Maximalwert Ulp und Momentanwert ^ ermittelt . Das Ergebnis Uc steuert den Kompensationsstrom Ic in der Stromsenke C so, dass der Verbraucherstrom I = I1+!,, im Wesentlichen konstant ist und wenig schwankt .By means of a peak value rectifier S, the maximum value U lp of the measuring voltage U 1 is determined and in a voltage adder A, the difference between the maximum value U lp and instantaneous value ^ is determined. The result U c controls the compensation current I c in the current sink C so that the load current I = I 1 +! ,, is substantially constant and fluctuates little.
Die Filterwirkung der erfindungsgemäßen Anordnung wird durch die Genauigkeit der Messung des Laststromes I1 sowie der Steuergenauigkeit der Stromsenke C bestimmt . Die Ansprech- und Entladezeit des Spitzenwertgleichrichters S sowie der Mittelwert des durch diesen Spitzenwertgleichrichter gewonnenen Maximalwertes der Messspannung und auch der Vorhalt des Momentanwertes U1 der dem Laststrom proportionalen Messspannung werden so dimensioniert, dass sich für einen vorgegebenen Laststromverlauf I1 ein Optimum bezüglich Filterwirkung und Verlustleistung in der Stromsenke C ergibt .The filter effect of the arrangement according to the invention is determined by the accuracy of the measurement of the load current I 1 as well the control accuracy of the current sink C determined. The response and discharge time of the peak value rectifier S and the average value of the obtained through this peak value rectifier maximum value of the measuring voltage and the derivative of the instantaneous value U 1 of proportional to the load current measuring voltage are dimensioned such that for a predetermined load current profile I 1 an optimum with respect to filtering effect and power loss in the current sink C results.
Vorzugsweise ist dem Stromkompensationskreis auch eine nicht eingezeichnete Schaltvorrichtung zugeordnet, durch welche der Kompensationsstrom Ic zusammen mit dem Verbraucher R1 ein- und ausgeschaltet wird. Ferner wird durch entsprechende Begrenzung des im Spitzenwertgleichrichter S ermittelten Maximalwertes Ulp der Spitzen- Kompensationsstrom Ic festgelegt . Dazu ist beispielsweise parallel zum Ladekondensator des Spitzenwertgleichrichters S ein entsprechender Spannungsbegrenzer geschaltet .Preferably, the current compensation circuit is also associated with a non-illustrated switching device through which the compensation current I c is switched on and off together with the consumer R 1 . Furthermore, by limiting the maximum value U lp determined in the peak value rectifier S, the peak compensation current I c is set. For this purpose, for example, a corresponding voltage limiter is connected in parallel with the charging capacitor of the peak value rectifier S.
Außerdem ist es vorteilhaft, den Mittelwert des Kompensationsstromes Ic sowie die Temperatur der Stromsenke C zu überwachen und in Abhängigkeit davon den Maximalwert Ulp zu begrenzen, so dass im Fall einer Überlastung die Filterwirkung entsprechend begrenzt und geschwächt wird.In addition, it is advantageous to monitor the mean value of the compensation current I c and the temperature of the current sink C and to limit the maximum value U lp as a function of this, so that in the case of an overload, the filter effect is correspondingly limited and weakened.
Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt . Sämtliche beschriebenen und gezeichneten Elemente sind beliebig miteinander kombinierbar . The invention is not limited to the illustrated embodiment. All described and drawn elements can be combined with each other.

Claims

Ansprüche claims
1. Anordnung zum Glätten des einem Verbraucher (R1) zugeführten Verbraucherstromes ( I) mittels einer dem1. Arrangement for smoothing the consumer (R 1 ) supplied load current (I) by means of a
Verbraucher (R1) parallel geschalteten steuerbarenConsumer (R 1 ) parallel controllable
Stromsenke (C) , dadurch gekennzeichnet, dass von dem dem Verbraucher (R1) zugeführten Laststrom ( I1) eine diesem proportionale Messspannung (U1) abgeleitet wird, mittels eines Spitzenwertmessers (S) deren Maximalwert (Ulp) bestimmt wird und mit der Differenz aus Maximalwert und Messspannung (U1P-U1) die spannungsgesteuerte Stromsenke (C) so gesteuert ist, dass die Summe aus dem durch die Stromsenke fließenden Kompensationsstrom (Ic) und dem durch den Verbraucher (R1) fließenden Laststrom (I1) im Wesentlichen konstant ist .Current sink (C), characterized in that from the said load (R 1 ) supplied load current (I 1 ) a proportional measurement voltage (U 1 ) is derived by means of a peak value meter (S) whose maximum value (U lp ) is determined and the difference between maximum value and measuring voltage (U 1P -U 1 ), the voltage-controlled current sink (C) is controlled so that the sum of the current flowing through the current sink compensation current (I c ) and by the load (R 1 ) flowing load current (I 1 ) is substantially constant.
2. Anordnung nach Anspruch 1 , dadurch gekennzeichnet, dass die dem Laststrom (I1) proportionale Messspannung (U1) an einem im VerbraucherStromkreis angeordneten Shunt- Widerstand und der Maximalwert dieser Messspannung mittels eines Spitzenwertgleichrichters (S) gemessen wird.2. Arrangement according to claim 1, characterized in that the load current (I 1 ) proportional measuring voltage (U 1 ) is measured at a arranged in the consumer circuit shunt resistor and the maximum value of this measurement voltage by means of a peak value rectifier (S).
3. Anordnung nach Anspruch 1 oder 2 , dadurch gekennzeichnet, dass der Maximalwert (Ulp) der Messspannung (U1) auf einen vorbestimmten Wert begrenzt ist .3. Arrangement according to claim 1 or 2, characterized in that the maximum value (U lp ) of the measuring voltage (U 1 ) is limited to a predetermined value.
4. Anordnung nach Anspruch 3 , dadurch gekennzeichnet, dass der Mittelwert des Kompensationsstromes (Ic) der Stromsenke (C) und in Abhängigkeit davon die Begrenzung des Maximalwertes (Ulp) bestimmt wird.4. Arrangement according to claim 3, characterized in that the mean value of the compensation current (I c ) of the current sink (C) and in dependence thereon the limitation of the maximum value (U lp ) is determined.
5. Anordnung nach Anspruch 3 oder 4 , dadurch gekennzeichnet, dass die Temperatur der Stromsenke (C) bestimmt und in Abhängigkeit davon die Begrenzung des Maximalwertes (Ulp) bestimmt wird.5. Arrangement according to claim 3 or 4, characterized the temperature of the current sink (C) is determined and the limitation of the maximum value (U lp ) is determined as a function of this.
6. Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Anordnung durch eine Schaltvorrichtung zusammen mit dem Verbraucher (R1) ein- und ausschaltbar ist . 6. Arrangement according to one of the preceding claims, characterized in that the arrangement by a switching device together with the consumer (R 1 ) on and off.
EP06706245A 2005-01-26 2006-01-16 Device for smoothing a current supplied to a consumer Active EP1842120B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005003686A DE102005003686A1 (en) 2005-01-26 2005-01-26 Current smoothing arrangement for electronic device, has current sink, where difference between maximum value and measuring voltage controls sink such that sum of compensation current supplied by sink and load current is constant
PCT/EP2006/000334 WO2006079463A1 (en) 2005-01-26 2006-01-16 Device for smoothing a current supplied to a consumer

Publications (2)

Publication Number Publication Date
EP1842120A1 true EP1842120A1 (en) 2007-10-10
EP1842120B1 EP1842120B1 (en) 2009-01-07

Family

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Application Number Title Priority Date Filing Date
EP06706245A Active EP1842120B1 (en) 2005-01-26 2006-01-16 Device for smoothing a current supplied to a consumer

Country Status (5)

Country Link
US (1) US7733071B2 (en)
EP (1) EP1842120B1 (en)
DE (2) DE102005003686A1 (en)
IL (1) IL184762A (en)
WO (1) WO2006079463A1 (en)

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KR101953075B1 (en) 2009-10-07 2019-02-27 제넨테크, 인크. Methods for treating, diagnosing, and monitoring lupus
FR3038467B1 (en) * 2015-07-03 2019-05-31 Stmicroelectronics Sa CONTACTLESS TELEALIMED CARD
US10530440B2 (en) 2017-07-18 2020-01-07 Commscope Technologies Llc Small cell antennas suitable for MIMO operation

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US3325724A (en) * 1964-07-27 1967-06-13 William R Aiken Voltage stabilizer employing a photosensitive resistance element
US4253055A (en) * 1977-02-22 1981-02-24 American Optical Corporation Adjustable switching current regulator
US4186335A (en) * 1977-09-21 1980-01-29 Cahill Enterprises, Inc. Hearing aid battery recharging apparatus
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Also Published As

Publication number Publication date
IL184762A (en) 2011-10-31
US20080191676A1 (en) 2008-08-14
US7733071B2 (en) 2010-06-08
EP1842120B1 (en) 2009-01-07
WO2006079463A1 (en) 2006-08-03
IL184762A0 (en) 2007-12-03
DE102005003686A1 (en) 2006-08-03
DE502006002576D1 (en) 2009-02-26

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