EP1543664A1 - Circuit de transmission de signaux separes par voie electrolytique - Google Patents

Circuit de transmission de signaux separes par voie electrolytique

Info

Publication number
EP1543664A1
EP1543664A1 EP03807756A EP03807756A EP1543664A1 EP 1543664 A1 EP1543664 A1 EP 1543664A1 EP 03807756 A EP03807756 A EP 03807756A EP 03807756 A EP03807756 A EP 03807756A EP 1543664 A1 EP1543664 A1 EP 1543664A1
Authority
EP
European Patent Office
Prior art keywords
voltage
circuit arrangement
signal transmission
output
transmission part
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.)
Withdrawn
Application number
EP03807756A
Other languages
German (de)
English (en)
Inventor
Martin BÜRKERT
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.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen 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 Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP1543664A1 publication Critical patent/EP1543664A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0266—Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling

Definitions

  • Circuit arrangement for electrically isolated signal transmission
  • the invention relates to a circuit arrangement for the electrically isolated transmission of an analog input variable by means of a signal transmission part, with a voltage input and a voltage output, and in particular also for voltage adaptation between the voltage input and the voltage output of the circuit arrangement.
  • Circuit arrangements of this type are used in the industrial sector for the transmission of control signals in devices with an analog signal control input for 0 to 10 volts. Such circuit arrangements are also used, for example, to set a controller's setpoint or to evaluate a process variable in a control loop.
  • a control signal is required. be galvanically isolated from a power supply network and can be touched in the sense of these safety standards.
  • Such a circuit is referred to as a SELV or PELV circuit.
  • Another problem is represented by different voltage ranges that are required for different assemblies or circuits.
  • B. for a setpoint adjustment in a control loop is a 0 to 10 volt signal industry standard
  • a microcontroller requires an input voltage range of z. B. 0 to 5 volts. This conversion must be as error-free as possible, i. H. the signal transmission must be as linear as possible.
  • the invention is based on the object of creating a circuit arrangement of the type mentioned at the outset which is very linear and enables galvanic signal separation in a simple manner.
  • Fig. 3 for comparison a first known variant of a galvanic
  • the charging resistor R1 is located directly at the input, so that the input voltage U1 is divided between the two resistors R1, R2 according to the division ratio defined by the resistors R1 and R2.
  • the capacitor C1 is a smoothing element, charging and discharging element at the same time.
  • the output-side circuit part 3 preferably consists of a transistor as the switching element S1 and a semiconductor element with differential inputs, which is designed as a differential amplifier V1.
  • the switching element S1 is connected to one of its switching ends 7 with a winding end 9 of the signal transmission part 6 and with its other switching end 8 to ground or 0 volts.
  • the differential amplifier V1 is connected with its differential inputs at both control voltage output-side winding ends 9, 10 of the signal transmission part 6.
  • the output of the differential amplifier V1 forms the voltage output 5 with the output voltage U3.
  • the slope of the second ramp 16 depends on the level of the input voltage U1, as can be seen from equation (1) and equation (5).
  • the voltage U1 is decisive in a time window.
  • the time window T1 with a start of sampling (tO) and an end of sampling (t1) is necessary because it is in principle a signal sampling, the sampled value (U3) being available after time t1 similar to a sample and hold circuit stands (see Fig. 2).
  • the Voltage U1 does not have to be a constant DC voltage, but, like any analog control signal, can also change.
  • the sampling frequency with which the switching element is driven must be much higher in relation to the possible signal changes of the analog input signal.
  • the sampling frequency can e.g. B. 1 Hz to 100 kHz.

Abstract

L'invention concerne un circuit permettant de transmettre de manière séparée par voie électrolytique une grandeur d'entrée analogique à l'aide d'un élément de transmission de signaux, comprenant une entrée de tension et une sortie de tension, ainsi qu'en particulier d'adapter la tension entre l'entrée de tension et la sortie de tension du circuit. L'élément de transmission de signaux se présente sous forme d'élément de transmission de signaux (6) inductif et le circuit est équipé d'un système de charge et de décharge qui comporte un élément de commutation (S1), de sorte que l'actionnement dudit élément de commutation (S1) induise un courant de charge ou de décharge (i1, i2) proportionnel à une tension d'entrée (U1) et s'écoulant à travers l'élément de transmission de signaux (6) et qu'une tension de sortie (U3) s'ajuste au niveau de la sortie de tension.
EP03807756A 2002-09-24 2003-07-24 Circuit de transmission de signaux separes par voie electrolytique Withdrawn EP1543664A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10244665 2002-09-24
DE10244665A DE10244665A1 (de) 2002-09-24 2002-09-24 Schaltungsanordnung zur galvanisch getrennten Signalübertragung
PCT/EP2003/008131 WO2004034662A1 (fr) 2002-09-24 2003-07-24 Circuit de transmission de signaux separes par voie electrolytique

Publications (1)

Publication Number Publication Date
EP1543664A1 true EP1543664A1 (fr) 2005-06-22

Family

ID=31969561

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03807756A Withdrawn EP1543664A1 (fr) 2002-09-24 2003-07-24 Circuit de transmission de signaux separes par voie electrolytique

Country Status (5)

Country Link
US (1) US20060152270A1 (fr)
EP (1) EP1543664A1 (fr)
AU (1) AU2003251469A1 (fr)
DE (1) DE10244665A1 (fr)
WO (1) WO2004034662A1 (fr)

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DE102006009506B4 (de) * 2006-02-27 2010-09-23 Phoenix Contact Gmbh & Co. Kg Bidirektionaler, galvanisch getrennter Übertragungskanal
DE102008033428B4 (de) 2008-07-16 2022-12-08 Vitesco Technologies Germany Gmbh Verfahren und Anordnung zur Spannungsmessung mit galvanischer Trennung
US8456267B2 (en) * 2010-05-14 2013-06-04 Agilent Technologies, Inc. High-impedance DC-isolating transmission line transformers
CN105655204B (zh) * 2016-01-19 2018-04-24 东南大学 一种无源无线微机械开关
DE102016119826A1 (de) * 2016-10-18 2018-04-19 Ebm-Papst St. Georgen Gmbh & Co. Kg Vorrichtung zur potentialgetrennten Lüfteransteuerung sowie Lüftersystem und Ansteuerverfahren

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GB9314391D0 (en) * 1993-07-12 1993-08-25 Gyrus Medical Ltd A radio frequency oscillator and an electrosurgical generator incorporating such an oscillator
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EP1355410A1 (fr) * 1997-04-30 2003-10-22 Fidelix Y.K. Une alimentation à découpage
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KR100303450B1 (ko) * 1998-05-29 2001-11-30 김덕중 역률보정제어기
WO2000014862A1 (fr) * 1998-09-07 2000-03-16 Koninklijke Philips Electronics N.V. Montage de circuit
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DE29901322U1 (de) * 1999-01-28 1999-07-08 Melcher Ag Spannungskonverter
DE19920625A1 (de) * 1999-05-06 2000-11-09 Thomson Brandt Gmbh Schutzschaltung für einen Schalter sowie Schaltnetzteil
FR2808396B1 (fr) * 2000-04-27 2003-01-31 St Microelectronics Sa Circuit de detection de prise de ligne
GB0031551D0 (en) * 2000-12-22 2001-02-07 3D Instr Ltd Switched mode circuit topologies
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Title
See references of WO2004034662A1 *

Also Published As

Publication number Publication date
AU2003251469A1 (en) 2004-05-04
US20060152270A1 (en) 2006-07-13
WO2004034662A1 (fr) 2004-04-22
DE10244665A1 (de) 2004-04-01

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