EP0658866B1 - Anordnung zur potentialgetrennten Übertragung von Gleich- und Wechselstromsignalen - Google Patents
Anordnung zur potentialgetrennten Übertragung von Gleich- und Wechselstromsignalen Download PDFInfo
- Publication number
- EP0658866B1 EP0658866B1 EP94250295A EP94250295A EP0658866B1 EP 0658866 B1 EP0658866 B1 EP 0658866B1 EP 94250295 A EP94250295 A EP 94250295A EP 94250295 A EP94250295 A EP 94250295A EP 0658866 B1 EP0658866 B1 EP 0658866B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transmission
- rectifier
- transformer
- inverter
- galvanically isolated
- 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 - Lifetime
Links
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Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
Definitions
- the invention relates to an arrangement for electrically isolated Transmission of direct and alternating current signals via Two-wire lines.
- the circuits are for the Measurement value acquisition and measurement value processing galvanically from each other executed separately.
- Newer field devices are also characterized by universal, properties largely adaptable to the respective process.
- the Parameterization data and the measured values as well as the status data are all in one AC voltage modulated, preferably frequency modulated.
- the alternating current transmission path is via a separate two-wire line guided and provided with separate means for electrical isolation.
- the invention is therefore based on the object of an arrangement to be specified, which makes it possible to maintain the 0/4 ... 20 mA interface DC signals unidirectional and AC signals bidirectionally electrically isolated via a common two-wire line transfer.
- this task is accomplished by a transmission quadrupole a first and a second pair of terminals for connection one incoming and one outgoing two-wire line, which starting from a known combination of means, for unidirectional, galvanically isolated transmission of direct current signals separate transmitter for bidirectional transmission of Has AC signals.
- the windings are the second each in one of the current paths for the coming and the looped-in two-wire cable.
- the middle combination for unidirectional, galvanically isolated Transmission of direct current signals consists of one Inverter, a coupling stage and a rectifier.
- Inverters within the scope of this invention are any facility understand that is suitable for an incoming direct current into a to implement electrical alternating quantities, regardless of whether the amplitude, the frequency or phase of this variable to the coming DC is proportional. Accordingly, as a rectifier is in the frame this invention to understand any device that is suitable from the amplitude, frequency or phase of an electrical Alternating size to generate a proportional direct current.
- the Transmission medium of the coupling stage can be inductive, capacitive or be optical.
- winding connections of the same name of the transformer are on eponymous terminals for the coming and the going Two-wire line switched.
- connection terminals In relation to the connection terminals, the same name should mean that, based on the direct current transmission, each pair of terminals one Plus terminal and a minus terminal.
- Eponymous Winding connections are related to the beginning and end of each winding on the winding sense.
- Incoming and outgoing two-wire lines are on the flow of information of the unidirectional direct current signal. That means the coming two-wire line is with the inverter and the outgoing Two-wire line connected to the rectifier.
- Each winding of the transformer acts for the direct current transmission only the ohmic component in the form of a voltage increase on the Terminals without affecting the signal flow.
- the AC signal is superimposed on the DC current. about inner or external capacitive bridges, the AC signal becomes low-impedance switched the two-wire line.
- the DC components of the magnetic fluxes in the windings of the transformer with a DC ratio of 1: 1 from coming to outgoing DC signal, so that a core for the transformer comparatively small volume for the saturation-free transmission of the AC signal is sufficient.
- a transmission quadrupole 10 is shown, the one Derailleur circuit, consisting of an inverter 11, a coupling stage 12 with electrical isolation and a rectifier 13 and with a first pair of terminals 111 and 112 and a second Pair of terminals 131 and 132 is provided.
- the inverter 11 optionally has means for signal amplification.
- capacitive switching elements cause a short circuit of the inverter in terms of AC voltage.
- the Quadruple transmission 10 also has a connection 110 Power supply to the inverter 11.
- the rectifier 13 can be an active or passive rectifier be executed. If the rectifier 13 is of the active type, then points the transmission quadrupole 10 has a connection 130 for powering the Rectifier 13 on.
- the rectifier 13 is capacitive Provide switching means, the AC influences on the output side short circuit.
- the transmission quadrupole 10 also has a transformer 14 a first winding 141 and a second winding 142.
- the Inductance of the first winding 141 is in series with the inverter 11 upstream, and the inductance of the second winding 142 is the Rectifier 13 connected in series.
- the series connection from the first winding 141 of the transformer 14 and the inverter 11 is on the first pair of terminals 111 and 112 connected.
- the Series connection from the inductance of the second winding 142 of the The transformer 14 and the rectifier 13 is connected to the second Pair of terminals 131 and 132 of the transmission quadripole 10 connected.
- connection 111 the positive terminal and the Terminal 112 the minus terminal of the coming DC transmission path
- terminal 131 is the positive terminal and connection 132 the minus terminal of the outgoing DC transmission path
- the windings 141 and 142 of the Transmitter 14 are in the current paths of the DC transmission path switched that same Winding connections are connected to terminals of the same name.
- the beginning of winding are represented in the usual way by an *.
- the direct current fed in via the connections 111 and 112 is in the Inverter 11 converted into an equivalent AC voltage, the via the coupling stage 12 with galvanic isolation to the Rectifier 13 is transmitted.
- the rectifier 13 received alternating current is converted into an equivalent direct current and delivered via the connections 131 and 132. That via the connections 111 and 112 coming AC signal is over the capacitive Switching elements in the inverter 11 on the first winding 141 of the Transmitter 14 switched and with this potential-free to the second Transfer 142 of the transformer 14. about the capacitive Switching elements in the rectifier 13, the AC signal from the second winding 142 transferred to the terminals 131 and 132.
- the AC transmission takes place in the opposite direction analogous way.
- a separation amplifier which consists of a Transmission square 10 and a power supply device 50 consists.
- the power supply device 50 is connected to external Auxiliary energy 60 is fed and points from this and below galvanically isolated supply circuits for connection to the Power supply of the inverter 110 and the power supply of the Rectifier 130 on.
- To transfer the equal and AC signals are coming to terminals 111 and 112 Two-wire line 30 and a going to the connections 131 and 132 Two-wire line 40 connected.
- FIG Isolator shown, which consists of a transmission quadrupole 10 and a Converter 20 exists.
- the converter 20 is used to feed the Inverter 11 of the transmission quadrupole 10.
- the rectifier 13 of the Transmission quadrupole 10 is designed as a passive rectifier.
- Of the Transmitter 20 is on the input side to the incoming two-wire line 30 connected and is fed from the incoming DC signal.
- a transmission quadripole 10 equipped transmitter supply unit shown.
- a power supply device 50 is external Auxiliary energy 60 fed and from this galvanically points us from each other separate circuits for connection to the power supply terminal of the Rectifier 130 and the power supply terminal of the inverter 110 on.
- a transmitter 80 is shown, the source of the DC signal is.
- the transmitter 80 is connected to a two-wire line 30 connected, the single pole to the negative terminal 112 of the Transmission four-pole 10 and single-pole to the supply circuit for the inverter of the power supply device 50 is connected.
- the positive terminal 111 is connected to the connection for the power supply 110 of the Inverter 11 connected.
- this embodiment the AC signal is transmitted between the transmitter 80 and the transmission quadrupole 10 via capacitive switching means in Supply circuit of the power supply device 50 for the Inverter 13.
- capacitive switching means also serve as Smoothing and sieving capacitors in providing the DC supply voltage for the inverter 13.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Power Conversion In General (AREA)
- Inverter Devices (AREA)
- Burglar Alarm Systems (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
- Fig. 1
- eine Darstellung des Übertragungsvierpols,
- Fig. 2
- eine Anordnung des Übertragungsvierpols in einem Trennverstärker,
- Fig. 3
- eine Anordnung des Übertragungsvierpols in einem passiven Trenner,
- Fig. 4
- eine Anordnung des Übertragungsvierpols in einem Speisetrenner,
- Fig. 5
- eine Anordnung des Übertragungsvierpols in einem Meßumformerspeisegerät.
- 10
- übertragungsvierpol
- 11
- Wechselrichter
- 12
- Koppelstufe mit galvanischer Trennung
- 13
- Gleichrichter
- 14
- Übertrager
- 20
- Umformer
- 30
- kommende Zweidrantleitung
- 40
- gehende Zweidrahtleitung
- 50
- Stromversorgungseinrichtung
- 60
- Hilfsenergie
- 80
- Meßumformer
- 110
- Stromversorgung des Wechselrichters
- 111
- Anschluß für kommende Plusleitung
- 112
- Anschluß für kommende Minusleitung
- 130
- Stromversorgung des aktiven Gleichrichters
- 131
- Anschluß für gehende Plusleitung
- 132
- Anschluß für gehende Minusleitung
- 141, 142
- Induktivitäten
Claims (2)
- Anordnung zur potentialgetrennten Übertragung von Gleich- und Wechselstromsignalen über Zweidrahtleitungen mit einer Kombination, bestehend aus einem Wechselrichter, einer Koppelstufe mit galvanischer Trennung und einem Gleichrichter zur unidirektionalen Gleichstromübertragung und einem Übertrager zur Wechselstromubertragung, wobei der Wechselrichter mit einem ersten Anschlußklemmenpaar und der Gleichrichter mit einem zweiten Anschlußklemmenpaar verbunden ist,
dadurch gekennzeichnet,daß dem Wechselrichter (11) eine erste Reineninduktivität (141) vorgeschaltet ist,daß dem Gleichrichter (13) eine zweite Reineninduktivität (142) nachgeschaltet ist,und daß die erste und die zweite Reiheninduktivität (141, 142) Wicklungen des Übertragers (14) zur Wechselstromübertragung sind. - Anordnung nach Anspruch 1,
dadurch gekennzeichnet,daß gleichnamige Wicklungsanschlüsse des Übertragers (14) an gleichnamige Anschlußklemmen (111, 131 / 112, 132) des ersten und zweiten Anschlußklemmenpaares (111, 112 / 131, 132) angeschlossen sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4343540 | 1993-12-14 | ||
DE4343540A DE4343540C2 (de) | 1993-12-14 | 1993-12-14 | Anordnung zur potentialgetrennten Übertragung von Gleich- und Wechselstromsignalen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0658866A1 EP0658866A1 (de) | 1995-06-21 |
EP0658866B1 true EP0658866B1 (de) | 1999-05-06 |
Family
ID=6505569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94250295A Expired - Lifetime EP0658866B1 (de) | 1993-12-14 | 1994-12-14 | Anordnung zur potentialgetrennten Übertragung von Gleich- und Wechselstromsignalen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0658866B1 (de) |
AT (1) | ATE179826T1 (de) |
DE (2) | DE4343540C2 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4421837C2 (de) * | 1994-06-22 | 2003-04-17 | Adl Analoge & Digitale Leistun | Treibermodul zur potentialfreien Signalübertragung |
DE19622295A1 (de) * | 1996-05-22 | 1997-11-27 | Hartmann & Braun Ag | Anordnung zur Datenübertragung in Prozeßleitsystemen |
DE29718405U1 (de) * | 1997-10-16 | 1998-11-12 | Siemens AG, 80333 München | Analogeingabeeinheit |
DE19925943A1 (de) * | 1999-06-08 | 2000-12-21 | Krohne Messtechnik Kg | Schaltungsanordnung zur Meßwerterfassung, -übertragung und -auswertung |
DE10335203A1 (de) * | 2003-07-30 | 2005-03-10 | Flowtec Ag | Service-Interface zum Anschluß an Feldgeräte der Prozeßautomation |
FI121101B (fi) * | 2007-01-22 | 2010-06-30 | Abb Oy | Laite analogisen virta- tai jännitesignaalin tuottamiseksi |
DE102008012414A1 (de) * | 2008-02-29 | 2009-09-03 | Siemens Aktiengesellschaft | Frontend einer Sensor- oder Aktor-Baugruppe mit digitaler Signalverarbeitungshardware |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4292633A (en) * | 1978-11-24 | 1981-09-29 | Robertshaw Controls Company | Two-wire isolated signal transmitter |
DE3407324A1 (de) * | 1984-02-29 | 1985-08-29 | Hartmann & Braun Ag, 6000 Frankfurt | Schaltungsanordnung zur galvanischen trennung von analogen gleichstromsignalen |
DE3526997A1 (de) * | 1984-07-28 | 1986-02-06 | Knick Elektronische Meßgeräte GmbH & Co, 1000 Berlin | Gleichstrom-uebertragungsschaltung |
AU646847B2 (en) * | 1990-02-21 | 1994-03-10 | Rosemount Inc. | Multifunction isolation transformer |
US5227782A (en) * | 1991-08-14 | 1993-07-13 | Rosemount Inc. | Hydrostatic interface unit |
DE4232922C2 (de) * | 1992-09-28 | 1995-10-05 | Mannesmann Ag | Anordnung zur Datenübertragung in Prozeßleitsystemen |
-
1993
- 1993-12-14 DE DE4343540A patent/DE4343540C2/de not_active Expired - Fee Related
-
1994
- 1994-12-14 AT AT94250295T patent/ATE179826T1/de not_active IP Right Cessation
- 1994-12-14 DE DE59408212T patent/DE59408212D1/de not_active Expired - Fee Related
- 1994-12-14 EP EP94250295A patent/EP0658866B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59408212D1 (de) | 1999-06-10 |
DE4343540A1 (de) | 1995-07-27 |
DE4343540C2 (de) | 1995-12-07 |
EP0658866A1 (de) | 1995-06-21 |
ATE179826T1 (de) | 1999-05-15 |
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