EP2899343B1 - Dispositif anti-rémanence pour serrure électromagnétique - Google Patents

Dispositif anti-rémanence pour serrure électromagnétique Download PDF

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Publication number
EP2899343B1
EP2899343B1 EP15152125.9A EP15152125A EP2899343B1 EP 2899343 B1 EP2899343 B1 EP 2899343B1 EP 15152125 A EP15152125 A EP 15152125A EP 2899343 B1 EP2899343 B1 EP 2899343B1
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EP
European Patent Office
Prior art keywords
coil
voltage
electromagnetic
pulse
current
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.)
Active
Application number
EP15152125.9A
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German (de)
English (en)
French (fr)
Other versions
EP2899343A1 (fr
Inventor
Jacob Benhammou
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.)
CDVI Digit SAS
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CDVI Digit SAS
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Filing date
Publication date
Priority claimed from FR1400153A external-priority patent/FR3016913A1/fr
Application filed by CDVI Digit SAS filed Critical CDVI Digit SAS
Priority to PL15152125T priority Critical patent/PL2899343T3/pl
Publication of EP2899343A1 publication Critical patent/EP2899343A1/fr
Application granted granted Critical
Publication of EP2899343B1 publication Critical patent/EP2899343B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C17/00—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith
    • E05C17/56—Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by magnetic or electromagnetic attraction or operated by electric or electromagnetic means
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00—Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/16—Devices holding the wing by magnetic or electromagnetic attraction
    • E05C19/166—Devices holding the wing by magnetic or electromagnetic attraction electromagnetic
    • 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
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • H01F7/1811—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current demagnetising upon switching off, removing residual magnetism
    • 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
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0048—Circuits, feeding, monitoring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/11—Magnetic

Definitions

  • the present invention relates to an electromagnetic lock device for controlling the opening / closing of an opening adapted to a frame of a frame, in particular a door.
  • This type of device conventionally comprises an electromagnetic suction cup comprising an electromagnet, generally in the shape of a parallelepiped, in particular rectangle, or prismatic, received in a section in two parts, each part consisting of a U-shaped section, the two sections U-shaped interlocking one within the other receiving the electromagnet within them and secondly a counterplate of a material capable of being attracted by a magnet, in particular a ferromagnetic material, for example a metallic material.
  • the counterplate is received in a strip section mounted along the free edge of the door, typically a door, while the electromagnetic lock is received in the frame, typically the door frame.
  • the reverse arrangement is also possible.
  • the devices of the prior art have provided to insert an anti-remanent electric circuit to send in the coil of the electromagnet an electric current in the opposite direction of the electric current magnetization.
  • These devices of the prior art are complex in structure and expensive to manufacture.
  • they comprise complex electronic components, such as relays, in particular bistable or of the DPDT type, transistors, or the like.
  • These devices moreover, are unreliable and often fail, particularly in the case of use for a door system intended to have a high cycle of use, for example in the case of access door to public places.
  • these anti-remanent electrical circuits of the prior art only work in one direction of the polarity of the current source, complicating their implementation in the door system.
  • an anti-remanent device which consists of a lug received in a blind hole formed on the surface of the plywood for example and which projects from the hole by being movably mounted so as to be pushed by a spring disposed at the bottom. of the blind hole and which tends to push the lug out of the hole.
  • the spur despite the spring, is pushed completely inside the hole.
  • the magnetic field is deactivated, there remains a remanent electromagnetic force which is less than the magnetic force in the activated state, and in particular which is lower than the spring biasing force on the pin, the stiffness constant of the spring having been previously selected in this goal. It follows that the lug emerges from the hole and spreads the suction cup, which allows the opening of the door by the user, the remanent electromagnetic force having been overcome by the action of the lug pushed by the spring.
  • the present invention aims to overcome the disadvantages of the prior art by proposing a device of the above kind which is simpler and more reliable structure.
  • an electromagnetic lock device is as defined in claim 1.
  • the energy of the cut-off voltage which is necessarily created when the power supply is cut off in the form of a negative voltage pulse is thus used by damping it on its return to the zero-volt level. to return a current in the coil to fight against the lingering effect.
  • DPDT relays Double Poles, Double Lanes
  • the use of the pulse current sent into the coil during the breaking ensures a curve giving the intensity of the current in the coil as a function of time which remains continuous, ie without sudden jump or discontinuity that may cause damage to the device.
  • means are provided for limiting the maximum absolute value of the cut-off voltage pulse, in particular means in the form of a varistor mounted across the at least one coil.
  • the means for limiting the maximum absolute value limit the absolute value of the maximum voltage to a value greater than the supply voltage.
  • the electrical circuit is arranged so that the voltage, after having passed once the zero back of the peak of the cut-off pulse, possibly damped by the limiting means, in particular the varistor, oscillates around zero while being damped. , in particular by becoming substantially zero after one or two pulse periods.
  • the arrangement is such that the device operates even if the polarity of the current source is reversed.
  • the electrical circuit comprises at least one unpolarized capacitor and a series resistor connected in parallel across the at least one coil of the electromagnet.
  • the electric circuit comprises a circuit consisting of two series-connected polarized capacitors mounted in parallel to the terminals of the at least one coil of the electro magnet.
  • the present invention also relates to a door device comprising an opening and a frame and an electromagnetic lock device according to the invention, one of the two elements of the electromagnetic lock device, namely the electromagnetic lock and the counter plate, being attached to the opening, while the other of the two elements is fixed to the frame.
  • the present invention also relates to a module forming anti-remanence device for an electromagnetic lock intended to be integrated in an electromagnetic lock and in particular in the electrical or electronic control circuit of the electromagnetic lock, the module comprising an electric circuit arranged so that the power supply source is mounted directly across the at least one coil so that when the interrupting means cuts off the power supply, a breaking voltage in the form of a pulse is applied to the coil and the electric circuit comprises means for delaying the zero crossing in return of the pulse, in particular of a duration at least equal to 40 thousandths of a second (ms), preferably at least 100 ms, even more preferably greater than 150 ms, for example between 100 ms and 300 ms.
  • ms millimeters
  • the electrical circuit of the module comprises two capacitors polarized in series, in particular mounted head to tail.
  • the electrical circuit of the module comprises an unpolarized capacitor and a series resistor.
  • an access opening / closing system comprising an opening, for example a door P, which, depending on its position, closes a door opening delimited by a frame, for example a frame D, or on the contrary, lets access.
  • the opening / closing of the door is controlled by an electromagnetic lock, comprising two elements, an electromagnetic suction cup and a counterplate 1.
  • the electromagnetic suction cup comprises two U-shaped profiles, nested one inside the other so as to define a closed enclosure inside which is housed an electromagnet 4 intended to create a magnetic field to attract the counterplate 1 against the electromagnetic lock with a force greater than at least the maximum force that a human is able to provide to open the door .
  • an electrical control circuit of the electromagnet for example mounted on an electronic card.
  • the electrical or electronic circuit comprises a power supply, for example in the form of a battery 2 which, depending on the applications, may have a value Vo which can be between 8 and 64 volts, for example 12 V, 24 V or 48 V , intended to pass in a coil L of inductance of the electromagnet a magnetization current.
  • a power supply for example in the form of a battery 2 which, depending on the applications, may have a value Vo which can be between 8 and 64 volts, for example 12 V, 24 V or 48 V , intended to pass in a coil L of inductance of the electromagnet a magnetization current.
  • This range of voltage and these voltage values are, however, given by way of example, and other larger values of the voltage may be provided without departing from the scope of the invention.
  • the electromagnet is described as having a single inductance coil. However, this is only for the purpose of simplifying the description, and it goes without saying that one can either provide several coils forming an equivalent coil which can then be considered as being said at least one coil of the electromagnet, or provide several coils and consider only one under the said at least one coil.
  • a switch 10 allows the circuit break.
  • the switch 10 is connected to a control button of the opening of the door.
  • a circuit module 22 consisting of two polarized capacitors 20 and 21 connected in series head to tail, is connected in parallel across the inductance L of the electromagnet.
  • This module 22 circuit has the function, when the current flowing in the coil is cut by the opening of the switch 10, in a first step to take the energy of the cutoff voltage pulse created by the opening of the switch by charging one of the two capacitors, and discharging the other capacitor to send a current in the coil in the opposite direction of the current flowing in the coil before opening the switch, to cancel or overcome the field magnetic remanent.
  • the door When the switch 10 is closed, the door is normally closed and an electric current passes through the coil, which creates a magnetic field. This magnetic field attracts the counterplate in a ferromagnetic material, for example metal, against the sucker and prevents the opening of the door.
  • a ferromagnetic material for example metal
  • a user When a user comes to open the door, he can for example press a button (possibly after typing an access code) or introduce a smart card or the like to activate a circuit that is connected to the switch. so that the actuation of the button causes the opening of the switch.
  • the magnetization current supply by the battery 2 is then cut off. Switching off the power supply by opening the switch creates a cut-off voltage pulse having a value equal to -Vm (see FIG. figure 3 ).
  • a varistor V has been mounted across the coil and the module 22 to limit the absolute value Vm of the maximum voltage of the cut-off pulse. However, Vm is limited to a value greater than V0 (as shown in FIG. figure 3 ).
  • the capacitors 20 and 21 then perform a charge-discharge cycle which creates a negative transient current in the coil.
  • This transient current which typically only lasts a few milliseconds, has the effect of canceling or greatly reducing the remanent magnetic field.
  • the user can open the door without having to overcome the electromagnetic force resulting from the remanent magnetic field.
  • the two capacitors reverse their respective polarities and are available immediately for a new cycle.
  • the current flowing in the coil is 500mA, 250mA and 125mA.
  • the internal resistance of the power supply may for example be respectively 25, 100, 400 Ohms, without the invention being limited in any way to this value.
  • the two capacitors which may be in particular capacitors of the Jamicon brand, have for example a capacity of 1000 microfarads for a nominal voltage of 25V, without the invention being limited in any way to this value.
  • resistor R in the circuit 22. It can be provided to add a resistor R in the circuit 22. however, it is an optional feature. In addition, it is preferable not to place it between the two capacitors 20 and 21.
  • the characteristic value of the inductor is for example equal to 2800H / 24Volts, without the invention being limited in any way whatsoever to this value.
  • This curve is continuous, that is to say that it does not include discontinuity such as sudden jumps, from the switch off to to.
  • Varistor V limits the value Vm.
  • modules 22 or 22 "to figures 2 and4, respectively, has the effect of slowing down the rise of the curve (with respect to a conventional cut-off voltage pulse) so that the voltage becomes zero again for the first time only after a time interval ⁇ To which is at least 40 ms, preferably at least 100 ms, still more preferably at least 150 ms, in particular between 120 ms and 300 ms. A current has thus been created in the coil sufficient to cancel the residual magnetism or remanence.
  • the electrical circuit (especially in the case where it comprises one of the modules 22 or 22 ") is such that the voltage returns to the value -Vo after a time interval ⁇ to greater than 40ms, especially greater than 70ms.
  • the voltage is sinusoidally amortized around zero.
  • the half oscillation period ( ⁇ t1- ⁇ To at the figure 3 ) is of the order of 100ms. At the end of a period of oscillation, the voltage is almost zero.
  • FIG. 4 there is shown a diagram of another electrical circuit, including electronic control of the current flowing in the coil of the electromagnet.
  • a current source is used in the form of a battery 2, with a nominal voltage of for example 12V, 24V or 48V.
  • the current flowing in the coil is 500mA, 250mA and 125mA.
  • the internal resistance of the power supply may for example be respectively 25, 100, 400 Ohms, without the invention being limited in any way to this value.
  • the characteristic value of the inductor is for example equal to 2800H / 24Volts, without the invention being limited in any way whatsoever to this value.
  • circuit module 22 in the form of a non-polarized capacitor 34 and a resistor R 'connected in series is mounted across the inductor in parallel with the latter.
  • This module 22 circuit has the function, when the current flowing in the coil is cut by the opening of the switch 10, in a first step to take the energy of the cutoff voltage pulse created by the opening of the switch by charging one of the two capacitors, and discharging the other capacitor to send a current in the coil in the opposite direction of the current flowing in the coil before opening the switch, to cancel or overcome the field magnetic remanent.
  • the capacitor 34 and the resistor R 'can for example and without the invention being limited to these values, have the characteristic values respectively of 25V / 1000 ⁇ F and 100 Ohms.
  • the curve giving the intensity passing through the coil L from a few moments before the opening of the switch is of identical shape to that shown in FIG. figure 3 for the circuit of the figure 2 and has the same characteristics.
  • the intensity decreases along a slope such that the current becomes zero after a time interval of a few thousandths of a second.
  • the intensity has been canceled, all the energy of the coil has been recovered by the module 22 "and the capacitor 34 discharges through the resistor R 'until the current reaches the lowest point of the curve.
  • the remanence is then erased and the door opens without difficulty.Then the same cycle as above starts again, but strongly damped, during a few oscillations, before final extinction of the current.
  • the embodiment described provides for fixing the plywood to the opening and the suction cup to the frame.
  • the reverse can be provided.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
  • Lock And Its Accessories (AREA)
EP15152125.9A 2014-01-24 2015-01-22 Dispositif anti-rémanence pour serrure électromagnétique Active EP2899343B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15152125T PL2899343T3 (pl) 2014-01-24 2015-01-22 Urządzenie zapobiegające remanencji dla zamka elektromagnetycznego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1400153A FR3016913A1 (fr) 2014-01-24 2014-01-24 Dispositif anti-remanence pour serrure electromagnetique
FR1400578A FR3016914B1 (fr) 2014-01-24 2014-03-10 Dispositif anti-remanence pour serrure electromagnetique

Publications (2)

Publication Number Publication Date
EP2899343A1 EP2899343A1 (fr) 2015-07-29
EP2899343B1 true EP2899343B1 (fr) 2018-10-31

Family

ID=52354906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15152125.9A Active EP2899343B1 (fr) 2014-01-24 2015-01-22 Dispositif anti-rémanence pour serrure électromagnétique

Country Status (5)

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US (1) US10392840B2 (pl)
EP (1) EP2899343B1 (pl)
ES (1) ES2709007T3 (pl)
FR (1) FR3016914B1 (pl)
PL (1) PL2899343T3 (pl)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10937262B2 (en) 2017-08-30 2021-03-02 Sensormatic Electronics, LLC Door system with power management system and method of operation thereof
US10943415B2 (en) * 2017-08-30 2021-03-09 Sensormatic Electronics, LLC System and method for providing communication over inductive power transfer to door
US10968669B2 (en) 2017-08-30 2021-04-06 Sensormatic Electronics, LLC System and method for inductive power transfer to door
CN109488091B (zh) * 2018-12-14 2024-02-02 浙江大学自贡创新中心 抵消剩磁力装置及其立体车库
US11434675B2 (en) * 2019-09-05 2022-09-06 Ford Global Technologies, Llc Vehicle storage assembly having residual magnetic latching mechanism
TWI727614B (zh) * 2020-01-17 2021-05-11 茂旭資訊股份有限公司 具有彈性推抵件以消除殘磁現象的磁力鎖
CN112349002B (zh) * 2020-10-20 2022-09-02 苏州市东挺河智能科技发展有限公司 一种具有缓冲功能的节能磁力锁

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US4246621A (en) * 1977-07-15 1981-01-20 Yuken Kogyo Company Limited Energizing circuit for solenoid valve
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EP0045197A1 (en) * 1980-07-28 1982-02-03 Bsg (Security) Limited Electromagnetic lock
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CA2518067A1 (en) * 2003-03-05 2004-09-16 William B. Duff, Jr. Electrical charge storage device having enhanced power characteristics
KR100652246B1 (ko) * 2005-07-20 2006-12-01 우리산업 주식회사 자동차 컴프레서에 결합되는 마그네틱 클러치용 필드코일어셈블리의 전원 연결부
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Also Published As

Publication number Publication date
US10392840B2 (en) 2019-08-27
FR3016914B1 (fr) 2020-04-24
FR3016914A1 (fr) 2015-07-31
US20150211270A1 (en) 2015-07-30
PL2899343T3 (pl) 2019-05-31
ES2709007T3 (es) 2019-04-12
EP2899343A1 (fr) 2015-07-29

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