WO2011085958A1 - Dispositif de contrôle de circuit électrique - Google Patents

Dispositif de contrôle de circuit électrique Download PDF

Info

Publication number
WO2011085958A1
WO2011085958A1 PCT/EP2011/000070 EP2011000070W WO2011085958A1 WO 2011085958 A1 WO2011085958 A1 WO 2011085958A1 EP 2011000070 W EP2011000070 W EP 2011000070W WO 2011085958 A1 WO2011085958 A1 WO 2011085958A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
control device
load
semiconductor switches
current paths
Prior art date
Application number
PCT/EP2011/000070
Other languages
German (de)
English (en)
Inventor
Martin Gehrke
Wolfgang Robel
Original Assignee
Festo Ag & 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 Festo Ag & Co. Kg filed Critical Festo Ag & Co. Kg
Priority to CN2011800141061A priority Critical patent/CN102939717A/zh
Priority to EP11702919A priority patent/EP2524432A1/fr
Publication of WO2011085958A1 publication Critical patent/WO2011085958A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/0027—Measuring means of, e.g. currents through or voltages across the switch

Definitions

  • the invention relates to a device for electrical circuit monitoring of a load circuit containing at least one electrical load, wherein two supply voltage terminals are connected via the respective first semiconductor switch having current paths with the two load terminals.
  • Such a device serves, for example, as a safety shutdown system, in order in particular to deactivate energy-rich system components when an error situation or a malfunction is detected.
  • the electric current or the supply voltage is switched off and / or an error message and / or an error display generated ⁇
  • the separation of the consumer can _ one or two channels take place.
  • Suchgateabschaltsystem is known for example from WO 02/095282 AI.
  • the semiconductor switching elements are really able to open the safety circuit in case of danger, they are repeatedly opened in a known manner repeatedly and monitors the effect on a detection circuit. This is realized by observing the voltage on the switched side.
  • the reconnection of the consumer is adaptive after clear detection of the shutdown pulse.
  • this has the disadvantage that it can be so long that the
  • CONFIRMATION COPY Reaction of the shutdown of the load relevant and ge ⁇ can also function harmful if necessary. In a known manner, therefore, a second, parallel switching path is realized, which takes over the interrupted supply of the load at the time of the test pulse. However, this means an increased effort.
  • the object of the present invention is to provide an apparatus for electrical circuit monitoring, by which not only the switching capability of serving for switching electrical consumers semiconductor switches can be monitored, with very short turn-off or power interruptions are possible without the operation of the consumer is appreciably affected, but that additionally cross-flow measurements for the detection of impermissible cross-currents can be performed.
  • the device according to the invention has the advantage that in addition to the testing or monitoring of the switching capability of the transistors, a cross-current measurement can also be carried out in order to detect and detect cross-circuits. By measuring the current, it is possible to realize very short switching times or turn-off times of the transistors for the measurement, without affecting the operation of the one or more electrical loads.
  • the two first semiconductor switches in the two current paths simultaneously form the high-current shunts, so that it is possible to dispense with separate high-current shunts.
  • the device is designed as an electrical device connected between the supply voltage and the at least one external electrical load, in which an internal consumer connected in parallel to the at least one external consumer is contained.
  • an electronic control device connected to the current detection means is advantageously provided, which is preferably designed as a microcontroller or contains at least one.
  • control device expediently has control means for measuring range switching by opening the first semiconductor switches upon detection of a current through the high-current shunt which is below a predetermined or predefinable value.
  • control device further has comparison means for comparing the measured current values in the two current paths and / or parallel branches as well as detection and / or display means which can be activated when a deviation is detected.
  • comparison means for comparing the measured current values in the two current paths and / or parallel branches as well as detection and / or display means which can be activated when a deviation is detected.
  • the control device is also expediently connected to an external monitoring and control device via a bus system or wirelessly in order to transmit messages or perform parameterizations.
  • the control device also expediently has switch-off means for switching off all semiconductor switches in the case of fault detection or limit value overshoot.
  • an electrical device 10 for circuit monitoring contains two current paths 11, 12, in each of which the switching path of a transistor 13, 14 is connected.
  • the two current paths 11, 12 are connected to two supply voltage terminals 15, 16 of an otherwise not shown Supply voltage source and on the other hand via two consumer terminals 17, 18 connected to an external consumer 19, which may in principle also be multiple consumers who may also be non-resistive consumers (eg capacitive and / or inductive and / or resistive consumers) ,
  • a parallel branch 20, 21 is connected, each consisting of the series connection of another transistor 22, 23 with a low-current shunt 24, 25 respectively.
  • the tapped at the low-current shunts 24, 25 voltages are each a current shunt sensor 26, 27 supplied to the output generates a current-dependent signal and this an electric control device 28 supplies.
  • This electronic control device 28 also controls the two first transistors 13, 14 and the two second transistors 22, 23 in each case via a driver 29 to 32. These drivers 29 to 32 can in principle also be integrated in the electronic control device 28.
  • the electronic control device 28 contains at least one microcontroller 33 or is designed as such. Parallel to the external consumer 19, an internal consumer 34 is connected in the electrical device 10, which does not necessarily have to be an ohmic consumer.
  • the electronic control device 28 can communicate with a non-illustrated external monitoring or control device via a bus system 35, in particular emit error messages and status messages and / or receive external control signals, parameterization signals or programming signals. In principle, such communication can also be wireless, for example via radio, Bluetooth or optical, magnetic, inductive or the like.
  • the first transistors 13, 14 and second transistors 22 23 are shown in the figure as power OSFETs. In principle, however, other transistors or other switching elements can be used. Furthermore, the mecanicwi resistance of the two first transistors 13, 14 is also used simultaneously as Hochstromshunts. As an alternative to this, separate high-current shunts could also be connected in series with the transistors 13, 14, in which case the parallel branches 20 21 would have to be connected in parallel to these high-current shunts.
  • the illustrated and described circuit or the corre sponding device 10 is used for combined current and cross-current measurement with range switching in the load branch of a Heidelbergstu fe and to test the turn-off of the transistors 13, 14 and 22, 23.
  • the test of the turn-off of the transistors is done by momentary shutdown of one or more of these transistors in a suitable combination and simultaneous current measurement. If no current flows in the switched-off state, then the switch-off was successful or the corresponding transistor, which has switched off, operates correctly.
  • This measurement must also without externally connected load "function 19, including an internal load and an internal load 34 is connected as a defined base-load at the output of device 10, in which case a defined current flow is evaluated.
  • both channels so both Strompfa de 11, 12 are connected symmetrically, to turn on the load all the transistors 13, 14, 22, 23 are turned on.
  • the load current is tapped directly on serving as a high-current shunt nen resistance of the transistors 13, 14 and measured via the Niederstromshunts 24, 25 in conjunction with the current shunts 26, 27. If, on the basis of the output signals of the current sensor sensors 26, 27, it is detected that the load current for the maximum current range is too low, the two first transistors become
  • the detection of high-resistance cross-circuits in the case of a low-impedance load can also be detected dynamically by switching off a channel for a short time, ie by switching off either the transistors 13, 14, 22 or the transistors 13, 14, 23.
  • the load is thus switched off alternately for a short time plus or minus and the current in the non-disconnected channel in the local parallel branch 20 to 21 measured. If this current flow is not 0 in all switching combinations, then there is a faulty cross-circuit.
  • the control inputs of the drivers 29 to 32 or the transistors 13, 14, 22, 23 can also be designed opto-decoupled to ensure a potential-free control.
  • the control program for the measuring cycles is contained in the control device 28 or in the microcontroller 33. If a faulty shutdown of one of the transistors 13, 14, 22, 23 or a cross-circuit is detected, then an error or message signal is generated, which is reported, for example, to the external control or monitoring device. There or on the electrical device 10, an acoustic and / or visual warning message or display is then generated, wherein an error storage can be realized. At the same time, all transistors 13, 14, 22, 23 are switched off, depending on the severity of the fault.
  • a resistance value for the low-current shunts 24, 25 is selected from a few ohms to KOhms.
  • the very short turn-off time of the transistors, for example, for measuring the turn-off is, for example, 3 / xs, even with such a short time, the measurement can be carried out successfully, while the operability of the external load 19 is not affected.

Landscapes

  • Measurement Of Current Or Voltage (AREA)
  • Electronic Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un dispositif de contrôle de circuit électrique destiné à contrôler un circuit de charge contenant au moins un récepteur électrique (19), deux bornes de tension d'alimentation (15, 16) étant reliées aux deux bornes de récepteur (17, 18) par l'intermédiaire de voies de courant (11, 12) comprenant chacune un premier commutateur à semi-conducteur (13, 14). Les moyens de détection du courant (26, 27) servent à détecter le courant circulant dans chacune des deux voies de courant (11, 12). Le montage série d'un autre second commutateur à semi-conducteur (22, 23) et d'un shunt à faible courant (24, 25) est branché en parallèle avec un shunt à fort courant dans chacune des deux voies de courant (11, 12), les deux bornes des shunts à faible courant (24, 25) étant chacune reliées aux moyens de détection du courant (26, 27).
PCT/EP2011/000070 2010-01-14 2011-01-11 Dispositif de contrôle de circuit électrique WO2011085958A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2011800141061A CN102939717A (zh) 2010-01-14 2011-01-11 用于电回路监控的装置
EP11702919A EP2524432A1 (fr) 2010-01-14 2011-01-11 Dispositif de contrôle de circuit électrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010004524.1A DE102010004524B4 (de) 2010-01-14 2010-01-14 Vorrichtung zur elektrischen Stromkreisüberwachung
DE102010004524.1 2010-01-14

Publications (1)

Publication Number Publication Date
WO2011085958A1 true WO2011085958A1 (fr) 2011-07-21

Family

ID=43858076

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/000070 WO2011085958A1 (fr) 2010-01-14 2011-01-11 Dispositif de contrôle de circuit électrique

Country Status (4)

Country Link
EP (1) EP2524432A1 (fr)
CN (1) CN102939717A (fr)
DE (1) DE102010004524B4 (fr)
WO (1) WO2011085958A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2757381A1 (fr) * 2013-01-21 2014-07-23 Phoenix Contact GmbH & Co. KG Appareil E/S doté d'une unité de surveillance du flux de courant et utilisation de celui-ci
US20160285276A1 (en) * 2015-03-25 2016-09-29 Festo Ag & Co. Kg Safety-Oriented Load Switching Device and Method for Operating a Safety-Oriented Load Switching Device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015213156A1 (de) 2015-07-14 2017-02-02 Festo Ag & Co. Kg Sicherheitsgerichtete Lastschalteinrichtung und Verfahren zum Betreiben einer sicherheitsgerichteten Lastschalteinrichtung
DE102020113822A1 (de) 2019-06-13 2020-12-17 Turck Holding Gmbh Vorrichtung und Verfahren zur elektrischen Stromkreisüberwachung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539602A (en) * 1994-10-19 1996-07-23 Gte Airfone Incorporated Ground fault interrupter
WO2002095282A2 (fr) 2001-05-22 2002-11-28 Pilz Gmbh & Co. Module de commutation de securite et procede servant a verifier la capacite d'interruption d'un element de commutation dans un module de commutation de securite
US20040184208A1 (en) * 2003-03-19 2004-09-23 Daniel Liu Power protecting device for electrical power source and load
US20070070558A1 (en) * 2005-09-28 2007-03-29 Daniel Liu Electrical load status detection and control device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10154158A1 (de) * 2001-11-03 2003-05-22 Bosch Gmbh Robert Vorrichtung zur Ansteuerung einer elektrischen Last und Steuergerät
DE102006040737A1 (de) * 2006-08-31 2008-03-06 Robert Bosch Gmbh Vorrichtung zur Nebenschluss-Erkennung an einer Ventilendstufe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5539602A (en) * 1994-10-19 1996-07-23 Gte Airfone Incorporated Ground fault interrupter
WO2002095282A2 (fr) 2001-05-22 2002-11-28 Pilz Gmbh & Co. Module de commutation de securite et procede servant a verifier la capacite d'interruption d'un element de commutation dans un module de commutation de securite
US20040184208A1 (en) * 2003-03-19 2004-09-23 Daniel Liu Power protecting device for electrical power source and load
US20070070558A1 (en) * 2005-09-28 2007-03-29 Daniel Liu Electrical load status detection and control device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2757381A1 (fr) * 2013-01-21 2014-07-23 Phoenix Contact GmbH & Co. KG Appareil E/S doté d'une unité de surveillance du flux de courant et utilisation de celui-ci
US20160285276A1 (en) * 2015-03-25 2016-09-29 Festo Ag & Co. Kg Safety-Oriented Load Switching Device and Method for Operating a Safety-Oriented Load Switching Device
US10263613B2 (en) * 2015-03-25 2019-04-16 Festo Ag & Co. Kg Safety-oriented load switching device and method for operating a safety-oriented load switching device

Also Published As

Publication number Publication date
DE102010004524A1 (de) 2011-07-21
DE102010004524B4 (de) 2017-01-19
CN102939717A (zh) 2013-02-20
EP2524432A1 (fr) 2012-11-21

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