EP1983295A1 - Schutzvorrichtung für einen Schwingkreis zur Leistungsübertragung - Google Patents

Schutzvorrichtung für einen Schwingkreis zur Leistungsübertragung Download PDF

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Publication number
EP1983295A1
EP1983295A1 EP07290482A EP07290482A EP1983295A1 EP 1983295 A1 EP1983295 A1 EP 1983295A1 EP 07290482 A EP07290482 A EP 07290482A EP 07290482 A EP07290482 A EP 07290482A EP 1983295 A1 EP1983295 A1 EP 1983295A1
Authority
EP
European Patent Office
Prior art keywords
current
measuring
power circuit
breaking
analyzing
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
EP07290482A
Other languages
English (en)
French (fr)
Other versions
EP1983295B1 (de
Inventor
Guillaume Huet
François Orquera
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.)
KNDS France SA
Original Assignee
Nexter Systems SA
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 Nexter Systems SA filed Critical Nexter Systems SA
Priority to EP07290482.4A priority Critical patent/EP1983295B1/de
Publication of EP1983295A1 publication Critical patent/EP1983295A1/de
Application granted granted Critical
Publication of EP1983295B1 publication Critical patent/EP1983295B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H11/00—Defence installations; Defence devices
    • F41H11/12—Means for clearing land minefields; Systems specially adapted for detection of landmines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H11/00—Defence installations; Defence devices
    • F41H11/12—Means for clearing land minefields; Systems specially adapted for detection of landmines
    • F41H11/13—Systems specially adapted for detection of landmines
    • F41H11/136—Magnetic, electromagnetic, acoustic or radiation systems, e.g. ground penetrating radars or metal-detectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H11/00—Defence installations; Defence devices
    • F41H11/12—Means for clearing land minefields; Systems specially adapted for detection of landmines
    • F41H11/16—Self-propelled mine-clearing vehicles; Mine-clearing devices attachable to vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G7/00—Mine-sweeping; Vessels characterised thereby
    • B63G7/02—Mine-sweeping means, Means for destroying mines
    • B63G7/06—Mine-sweeping means, Means for destroying mines of electromagnetic type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1844—Monitoring or fail-safe circuits

Definitions

  • the technical field of the invention is that of devices for protecting oscillating power circuits.
  • circuits including oscillating may be degraded by the presence of a direct current.
  • the coils used in the electromagnetic demining devices are sensitive to DC currents which may, after a certain time, deteriorate them, even if these currents have a level of intensity which is below a given threshold.
  • the object of the invention is to propose a protection device making it possible to protect against the appearance of such continuous currents.
  • the subject of the invention is a device for protecting an oscillating power circuit, and in particular a demining coil, a device comprising a breaking means interposed between an AC supply network and the power circuit.
  • device characterized in that it comprises at least one means for measuring and analyzing the current that supplies the power circuit, means that can detect the appearance of a direct current and connected to a triggering means ensuring the opening of the cutoff when the alternating current disappears.
  • the means for measuring and analyzing the current may comprise a logic module incorporating a resettable monostable component, the switching of which is controlled periodically by the variation of the supply network current, a component whose switching off command controls the appearance of an error signal which is used by the triggering means to cause the opening of the breaking means.
  • the means of measurement and analysis may also include a measurement module ensuring an evaluation of the value of the current of the supply network, the measuring module comprising a comparator means for comparing the measured value with a predefined threshold, the result of this comparison being used by the triggering means to cause the opening of the breaking means.
  • the triggering means will also be connected to a display means making it possible to highlight the state of the breaking means.
  • the invention also relates to the application of such a device to the protection of a de-mining coil.
  • a protection device 1 comprises a cut-off means 2 which is placed on a power conductor 3 connected to an AC supply network R, for example the network of a vehicle.
  • the breaking means 2 is arranged upstream of a power circuit 4 which here comprises a power box 5 connected to a demining coil 6.
  • a control box 7 is arranged upstream of the cutoff means 2. It controls the shape of the signals generated by the coil 6 and it comprises a man-machine interface for controlling the demining device.
  • the device 1 also comprises a means 8 for measuring and analyzing the current intended to supply the power circuit 4.
  • This measuring means 8 is connected to a triggering means 9 which makes it possible to control the opening of the breaking means 2.
  • the measuring means 8 is designed so as to detect the appearance of a direct current in the power conductor 3.
  • a display means 10 is also connected to the triggering means 9 and it makes it possible to highlight the open or closed state of the breaking means 2.
  • This display means 10 may, for example, comprise two LEDs of different colors, a light color corresponding to the open position of the breaking means 2 and the other to the closed position.
  • the figure 2 shows in a more precise way the organic and functional structure of the device 1.
  • the means 8 for measuring and analyzing the current comprises two different modules: a logic module 12 and a measurement module 13.
  • the logic module 12 incorporates a re-engagable monostable component 14 (for example a component known under the standard name 74HC4538).
  • the logic output of this component alternates with a frequency which is that of the current flowing in the power conductor 3.
  • This monostable 14 is connected to a state detector 15 (for example a flip-flop D) which makes it possible to identify a stop of the tilting of the monostable 14.
  • the stop of this tilting corresponds to the stop of the oscillation of the current which means either that there is no current flowing in the power conductor 3, or that this current is continuous.
  • the state detector 15 then provides an error signal (for example a transition to a logic state 1), which signal is applied to the tripping means 9 via an OR logic gate 16.
  • the triggering means 9 then causes the opening of the breaking means 2.
  • the state detector may be embodied as a specific electronic component (for example a component known under the standardized name 74HC74). It may simply consist of a software module incorporated in a computer, a module programmed to detect the stop of the oscillations of the output of the monostable 14. Such a computer may also be programmed to monitor forms of more complex currents .
  • the triggering means 9 may for example be constituted by a control circuit of the opening of the breaking means 2. If the breaking means 2 is constituted by a static switch such as a thyristor, the triggering means 9 may be for example the electronic control circuit of the trigger of this thyristor.
  • the measurement module 13 comprises a means 17 providing a measurement of the value of the current flowing in the supply network and the conductor 3.
  • the current measuring components are well known to those skilled in the art and may be of analog technology or digital.
  • the measurement module 13 also comprises a memory or register 18 inside which is incorporated a threshold value.
  • the measurement module finally comprises a comparator 19 which compares the value measured by the means 17 with the threshold contained in the memory 18.
  • the comparator is designed to deliver a signal (for example a logic state 1), which signal will be applied to the triggering means 9 via the logic gate 16.
  • the memory 18 in the form of calibrated electronic components incorporated in an analog comparator 19 made for example in the form of a bridge.
  • the breaking means 2 is actuated both when a level is excessive current than when the current changes from the alternating state to the continuous state.
  • the device according to the invention also ensures a cut-off of the power circuits when the current is stopped. This improves the insulation and protection of the circuit outside the phases of use.
  • a logic module 12 that can detect a continuous component superimposed on an oscillating signal. It will suffice to add at the level of the logic module 12, and parallel to the means 14 and 15, a stage comprising a filter eliminating the AC component followed by an evaluator measuring the DC component. This evaluator will include a comparator connected to another memory in which a threshold level of the DC component will be programmed.
  • the various means constituting the device 1 will advantageously be made in whole or in part using a microprocessor or computer which will include software means to ensure on the one hand the comparison of the intensity level current with a preprogrammed threshold and secondly to detect the stop current oscillations.
  • the invention has been described in its application to the protection of a demining coil. It can of course be applied to the protection of other types of electronic circuits degraded by direct current.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP07290482.4A 2007-04-19 2007-04-19 Schutzvorrichtung für einen Schwingkreis zur Leistungsübertragung Not-in-force EP1983295B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07290482.4A EP1983295B1 (de) 2007-04-19 2007-04-19 Schutzvorrichtung für einen Schwingkreis zur Leistungsübertragung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07290482.4A EP1983295B1 (de) 2007-04-19 2007-04-19 Schutzvorrichtung für einen Schwingkreis zur Leistungsübertragung

Publications (2)

Publication Number Publication Date
EP1983295A1 true EP1983295A1 (de) 2008-10-22
EP1983295B1 EP1983295B1 (de) 2019-01-30

Family

ID=38754816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07290482.4A Not-in-force EP1983295B1 (de) 2007-04-19 2007-04-19 Schutzvorrichtung für einen Schwingkreis zur Leistungsübertragung

Country Status (1)

Country Link
EP (1) EP1983295B1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368084A (en) * 1942-08-27 1945-01-30 Gen Motors Corp Protector
GB917896A (en) * 1959-09-28 1963-02-06 Philips Electrical Ind Ltd Improvements in or relating to devices for safeguarding against pulsating direct current a load to be fed with alternating current
DE1965483A1 (de) * 1969-12-30 1971-07-22 Licentia Gmbh Verfahren zur Stoerungsueberwachung einer nahezu rechteckfoermigen Wechselspannung
GB2143958A (en) * 1983-07-26 1985-02-20 Westinghouse Electric Corp Tracking filter for sensing dc content in an ac waveform
US5060166A (en) * 1989-12-06 1991-10-22 Abb Power T&D Company Inc. Method and apparatus for rapidly analyzing AC waveforms containing DC offsets
WO1997048965A1 (fr) * 1996-06-19 1997-12-24 Giat Industries Bobine de deminage et dispositif de deminage en faisant application

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2368084A (en) * 1942-08-27 1945-01-30 Gen Motors Corp Protector
GB917896A (en) * 1959-09-28 1963-02-06 Philips Electrical Ind Ltd Improvements in or relating to devices for safeguarding against pulsating direct current a load to be fed with alternating current
DE1965483A1 (de) * 1969-12-30 1971-07-22 Licentia Gmbh Verfahren zur Stoerungsueberwachung einer nahezu rechteckfoermigen Wechselspannung
FR2073510A1 (de) * 1969-12-30 1971-10-01 Licentia Gmbh
GB2143958A (en) * 1983-07-26 1985-02-20 Westinghouse Electric Corp Tracking filter for sensing dc content in an ac waveform
US5060166A (en) * 1989-12-06 1991-10-22 Abb Power T&D Company Inc. Method and apparatus for rapidly analyzing AC waveforms containing DC offsets
WO1997048965A1 (fr) * 1996-06-19 1997-12-24 Giat Industries Bobine de deminage et dispositif de deminage en faisant application

Also Published As

Publication number Publication date
EP1983295B1 (de) 2019-01-30

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