EP3997723A1 - Dispositif présentant une fonction d'arrêt d'urgence individuelle - Google Patents

Dispositif présentant une fonction d'arrêt d'urgence individuelle

Info

Publication number
EP3997723A1
EP3997723A1 EP20733395.6A EP20733395A EP3997723A1 EP 3997723 A1 EP3997723 A1 EP 3997723A1 EP 20733395 A EP20733395 A EP 20733395A EP 3997723 A1 EP3997723 A1 EP 3997723A1
Authority
EP
European Patent Office
Prior art keywords
switch
load
energy
energy source
emergency stop
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.)
Pending
Application number
EP20733395.6A
Other languages
German (de)
English (en)
Inventor
Thomas KLAUCK
Marcel Brasch
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.)
Liebherr Electronics and Drives GmbH
Original Assignee
Liebherr Elektronik GmbH
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 Liebherr Elektronik GmbH filed Critical Liebherr Elektronik GmbH
Publication of EP3997723A1 publication Critical patent/EP3997723A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/022—Emergency operating parts, e.g. for stop-switch in dangerous conditions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H2009/0083—Details of switching devices, not covered by groups H01H1/00 - H01H7/00 using redundant components, e.g. two pressure tubes for pressure switch

Definitions

  • the present invention relates to a device with an individual emergency stop function.
  • stop category 1 In the case of stop category 0, the energy supply to the drive elements is cut off immediately, although this only makes sense if the sudden switch-off of the energy does not cause any danger.
  • a controlled stop is carried out for systems in stop category 1. The machine is put into a safe state, and only then is the energy to the drive elements finally separated. This is useful if clamps, brakes, etc. Need energy. Systems with stop category 2 have the effect that the machine is put into a safe state, but the energy is not disconnected. This category is mainly used when there is no technical possibility to safely separate the energy. For example, on a crane with a lifting magnet, switching off the voltage on the magnet would cause the load to crash. For this purpose, different circuits with different control devices are often used in the system architecture in order to target the deactivation of components to only one part.
  • At least 3 circuit elements are required for such a functionality that enables individual control of outputs of a control device in the event of an emergency stop together with a second shutdown path.
  • 2n switches typically 2n + 1 switches
  • the device is provided with an individual emergency stop function and an energy source for providing electrical energy, a load that can be supplied with energy via the energy source, a first switch between the energy source and the load is arranged and interrupts a supply of energy to the load in its open state, a second switch which is arranged between the energy source and the load downstream of the first switch and interrupts a supply of energy to the load in its open state, and comprises a logic unit which is designed to operate the first switch and the second switch.
  • the device is characterized in that the logic unit is also designed to open the second switch in the event of an emergency stop request in order to disconnect the load from the energy source, and to check whether the opening of the switch leads to disconnection of the energy source from the load, and if not, to open the first switch.
  • the emergency stop function of the device is called “individual” because it first switches off the load in a targeted manner and only then, if this has failed, interrupts the main energy supply by opening the first switch. It can accordingly be provided that the second switch is only used to switch the load attached to it on or off and other loads that can be switched independently thereof are not switched by actuating the second switch. Since the second switch is also used to switch the load on and off regularly, it is not necessary to provide a further separate switch. In order to meet the strict requirements for an emergency stop, there must be a second switching path for deactivating the energy supply to the load, which according to the invention is provided via the first switch. In contrast to the prior art, a switching unit is saved and a more compact and less error-prone device can be provided.
  • the first switch and the second switch are connected in series with one another.
  • the series connection of the two switches immediately shows that opening just one of the switches leads to an interruption of the energy supply to the load, so that the load is in a safe state.
  • At least one further load is connected to the energy source via a junction arranged downstream of the first switch and upstream of the second switch.
  • This further load can be connected via an associated switch, which is also arranged in series with the first switch of the device.
  • This further load can thus be controlled by the logic unit in that the associated switch can be switched by the logic unit.
  • the logic unit now reaches an emergency stop request for a certain of the several loads, the main energy supply is not cut by opening the first switch, but only that load is deliberately de-energized by opening the associated second switch for which the Request has been received.
  • the other loads can continue to be supplied with the energy supply.
  • the logic unit determines after an attempt to open the associated second switch that the load is still being supplied with energy, the first switch is opened immediately, so that now not only the load for which the emergency stop request has been received, but all loads controllable by the logic unit are disconnected from the power supply.
  • the opening of the first switch is a deactivation of the main energy supply of the device and the opening of the second switch only causes the deactivation of the associated load.
  • n + 1 switches need to be present in the device for implementing the emergency stop function, so that when only two switches are required for exactly one load.
  • the required number of switches does not increase linearly by a factor of 2 with an increase in the loads used, but is only increased at the same time as the number of loads.
  • the energy source is a battery of a vehicle and in particular can also represent a connection to the terminal 30 of a vehicle battery. Terminal 30 describes the positive lead of the battery.
  • the emergency stop function is an emergency stop function in stop category 2.
  • the structure of the device therefore makes it possible to keep other components of the device in operation despite an emergency stop request. Only when the second switch is defective or cannot be opened for any other reason is the main power supply disconnected, so that any additional loads are no longer supplied with power.
  • the functionality of the emergency stop function is ensured up to performance level “d” according to ISO-13849. It can further be provided according to the present invention that the
  • Logic unit draws its energy from an independent energy source derived from Uv.
  • the first switch and the second switch are used to implement the emergency stop function of the load. Further switches are therefore not required.
  • a switch for each load provided with the emergency stop function of the present invention there is a switch (so-called second switch) assigned exclusively to this load, which is arranged downstream of the first switch and on which only the load to be switched is suspended. Further switches connected in series for this purpose are preferably not provided.
  • the second switch is the switch that is also used for the regular on or off switch of the load.
  • the invention also relates to a control system for a vehicle with a device according to one of the aspects listed above.
  • FIG. 1 is a general scheme of the present invention in which a first
  • Fig. 2 the general scheme of the present invention in which a second
  • FIG. 1 shows a structure of a possible interconnection of the present invention.
  • the device 1 has an energy source 2, which is represented in the figure by a supply voltage “U supply”. This is connected directly to a first switch 4, which can be controlled by a logic unit 6 via line 8. The other end of the first switch 8 is connected to a second switch 5, which can also be controlled by the logic unit 6. The control line bears the reference number 9. The other end of the second Switch 5 is in direct connection with a load 3, which should be separable from the energy source 2 by means of the emergency stop function.
  • the load 3 is connected to earth with its connection facing away from the switch, so that when the first switch 4 and the second switch 5 are closed, a voltage drop is present across the load.
  • a semiconductor diode 11 connected in parallel to the load can be provided to stabilize the emergency stop function, the cathode of which is clamped to the line leading between the second switch and the load and its anode is connected to earth.
  • the diode is accordingly in the reverse direction.
  • connection 10 which runs from the logic unit 6 to the load 3
  • the logic unit 6 can check whether the load 3 is de-energized or not.
  • Fig. 2 shows the alternative shutdown path to be carried out in dashed lines.
  • the logic unit 6 disconnects the main energy supply by moving the first switch 4 to its open position.
  • the first switch 4 is moved into its open position via the line 8, so that all of the loads arranged downstream of the first switch 4 are disconnected from the energy supply.
  • the line 10 outgoing from the logic unit 6 confirms (therefore shown in dashed lines) that the load 3 is disconnected from its energy supply 2.
  • the invention thus makes it possible to deactivate a dedicated electrical output with the aid of an emergency stop signal, while other outputs can be kept unchanged in their state. This enables non-safety-related functions to continue even though an emergency stop signal has successfully decoupled a load.
  • the logic unit shown in FIG. 1 and FIG. 2 can also consist of an interconnection of several independent individual logic units.

Landscapes

  • Stand-By Power Supply Arrangements (AREA)

Abstract

L'invention concerne un dispositif qui est pourvu d'une fonction d'arrêt d'urgence individuelle et qui comprend une source d'énergie pour fournir de l'énergie électrique, une charge pouvant être alimentée en énergie par l'intermédiaire de la source d'énergie, un premier commutateur, qui est disposé entre la source d'énergie et la charge et qui, dans son état ouvert, interrompt une alimentation de la charge en énergie, un deuxième commutateur, qui est disposé entre la source d'énergie et la charge en aval du premier commutateur et qui, dans son état ouvert, interrompt l'alimentation de la charge en énergie, et une unité logique, qui est configurée pour actionner le premier commutateur et le deuxième commutateur. Le dispositif est caractérisé en ce que l'unité logique est en outre configurée pour ouvrir lors d'une demande d'arrêt d'urgence le deuxième commutateur afin de couper la charge de la source d'énergie et pour vérifier si l'ouverture du commutateur a conduit à une coupure de la source d'énergie de la charge, et pour, dans le cas contraire, ouvrir le premier commutateur.
EP20733395.6A 2019-07-16 2020-06-15 Dispositif présentant une fonction d'arrêt d'urgence individuelle Pending EP3997723A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019119238.2A DE102019119238A1 (de) 2019-07-16 2019-07-16 Vorrichtung mit einer individuellen Not-Aus-Funktion
PCT/EP2020/066426 WO2021008790A1 (fr) 2019-07-16 2020-06-15 Dispositif présentant une fonction d'arrêt d'urgence individuelle

Publications (1)

Publication Number Publication Date
EP3997723A1 true EP3997723A1 (fr) 2022-05-18

Family

ID=71103373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20733395.6A Pending EP3997723A1 (fr) 2019-07-16 2020-06-15 Dispositif présentant une fonction d'arrêt d'urgence individuelle

Country Status (3)

Country Link
EP (1) EP3997723A1 (fr)
DE (1) DE102019119238A1 (fr)
WO (1) WO2021008790A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10041633A1 (de) * 2000-08-24 2002-03-07 Moeller Gmbh Schaltgeräteanordnung
DE10216226A1 (de) * 2002-04-08 2003-10-30 Pilz Gmbh & Co Vorrichtung zum fehlersicheren Abschalten eines elektrischen Verbrauchers, insbesondere in industriellen Produktionsanlagen
DE102014001923A1 (de) * 2014-02-12 2015-08-13 Kuka Roboter Gmbh Verfahren und Vorrichtung zum Festlegen einer Manipulatorachse
DE102014208709A1 (de) * 2014-05-09 2015-11-12 Smiths Heimann Gmbh Sicherheitseinrichtung
DE102014117280A1 (de) * 2014-11-25 2016-05-25 Pilz Gmbh & Co. Kg Sicherheitsschaltgerät zum Ein- und sicheren Ausschalten eines elektrischen Verbrauchers
JP6915410B2 (ja) * 2017-07-03 2021-08-04 オムロン株式会社 リレー装置

Also Published As

Publication number Publication date
DE102019119238A1 (de) 2021-01-21
WO2021008790A1 (fr) 2021-01-21

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