• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An electromagnetic lock device comprising an electromagnetic suction cup (3) comprising an electromagnet (4), a plywood (1) and an electrical circuit comprising a current source for supplying at least one coil of the electromagnetic solenoid electromagnet with a current magnetizing electric device for creating an electromagnetic field and an associated electromagnetic force pressing the plywood and the electromagnetic lock against each other to close the lock; interrupting means for disconnecting the power supply; and anti-remanence means for combating the residual electromagnetic force which persists when the interruption means cut off the power supply of the solenoid coil.
    公开号:FR3016914A1
    申请号:FR1400578
    申请日:2014-03-10
    公开日:2015-07-31
    发明作者:Jacob Benhammou
    申请人:CDVI；
    IPC主号:
    专利说明:

    [0001] 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.
    [0002] 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 profile in 10 U, both U-shaped sections fitting one into the other while receiving within them the electromagnet and secondly a counterplate of a material capable of being attracted by a magnet, in particular a ferromagnetic material, for example a metallic material . In general, the counterplate is received in a strip section mounted along the free edge of the sash, typically a door, while the electromagnetic sash is received in the frame, typically the door frame. However, the reverse arrangement is also possible. These devices forming an electromagnetic lock have the disadvantage, in particular, of having a remanence effect, ie when the electromagnetic lock is deactivated, for example by pressing on the opening button, the magnetic action tending to hold the door closed by magnetic attraction of the plywood on the suction cup, the user does not succeed in opening the door without having to apply a large enough force corresponding to the force necessary to overcome the magnetic force related to the remanent magnetic field, c ' that is to say the magnetic field which is maintained despite the cancellation of the cause that created it, namely the activation current. To solve this problem, the devices of the prior art have provided to insert an antiremanent electrical circuit to send in the coil of the electromagnet an electric current in the opposite direction of the electric current of magnetization. These devices of the prior art are complex in structure and expensive to manufacture. In particular, 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. In addition, 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. Mechanical solutions have also been proposed. There is provided an anti-remanent device which consists of a lug received in a blind hole formed on the surface of the counterplate for example and which projects from the hole by being mounted so as to be pushed by a spring disposed in the bottom of the blind hole and which tends to push the pin out of the hole. When the plywood and the plunger come into mutual contact under the effect of the closing electromagnetic force of the lock, the spur, despite the spring, is pushed back completely into the hole. When 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 less than the spring biasing force on the pin, the spring constant of the spring. spring having been previously chosen for this purpose. It follows that the lug comes out of the hole and spreads the suction cup, which allows the opening of the door by the user, the electromagnetic remanent force having been overcome by the action of the lug pushed by the spring . These devices of the prior art are complicated to manufacture. In addition, due to the wear especially under the effect of corrosion, they have a limited life. Moreover, the pushing action of the pin 15 in the hole by the electromagnetic force in the activated state decreases the magnetic force available to press the two elements of the electromagnetic lock against each other. . The present invention aims to overcome the disadvantages of the prior art by providing a device of the above kind which is simpler and more reliable structure. According to the invention, an electromagnetic lock device comprising an electromagnetic sucker comprising an electromagnet, a counterplate and an electrical circuit comprising a current source for supplying at least one coil of the electromagnet of the electromagnetic pad in an electric current. magnetization for creating an electromagnetic field and an associated electromagnetic force clamping against the counter plate and the electromagnetic lock to close the lock; interrupting means for disconnecting the power supply; and antiremannence means for combating the residual electromagnetic force which persists when the interruption means have cut off the power supply of the solenoid coil, is characterized in that the electrical circuit is 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, in particular a negative pulse, appears at the terminals of the coil and the electrical 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 equal to 100 ms even more preferably greater than 150 ms, for example between 100 ms and 300 ms. According to the invention, 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 residual effect. This gives a simple and reliable structure system. In particular, it is no longer necessary, as was the case in the devices of the prior art, to use complicated electronic components, such as DPDT relays (Double Poles, Double Lanes) to perform a reverse inversion. polarity across the coil to send a current in the opposite direction. This avoids the formation of particular sparks (during the sudden passage of relays from an open position to the other closed position) likely to deteriorate the device, especially in the case of a high duty cycle. In addition, 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. Preferably, means are provided for limiting the maximum absolute value of the breaking voltage pulse, in particular means in the form of a varistor mounted across the at least one coil. Preferably, however, the means for limiting the maximum absolute value limits the absolute value of the maximum voltage to a value greater than the supply voltage. Preferably, the electrical circuit is arranged so that the voltage, after passing 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. Preferably, the arrangement is such that the device operates even if the polarity of the current source is reversed. Preferably, the electrical circuit comprises at least one unpolarized capacitor and a series resistor connected in parallel across the at least one coil 30 of the electromagnet.
    [0003] According to a particularly advantageous embodiment, in particular by its simplicity of design and its reliability, 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.
    [0004] 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.
    [0005] According to a particularly advantageous embodiment, in particular by its simplicity of design and its reliability, the electrical circuit of the module comprises two capacitors polarized in series, in particular mounted head to tail. According to yet another embodiment, the electrical circuit of the module comprises an unpolarized capacitor and a series resistor. By way of example only, embodiments of the invention are described with reference to the drawings in which: FIG. 1 is a perspective view of a door device comprising a door forming the opening and a frame flanking the opening 15 and an electromagnetic lock to ensure the opening and / or closing of the door; FIG. 2 represents a simplified diagram of the electrical circuit for controlling the current flowing in the coil of the solenoid electromagnet which controls the opening / closing of the lock of FIG. 1; Fig. 3 shows the curve showing the voltage at the terminals of the coil as a function of time, from a point in time a little before the interruption of the supply; and FIG. 4 is a diagram of another embodiment of the electric control circuit of the lock of FIG. 1.
    [0006] In Figure 1, there is shown an access opening / closing system, comprising an opening, for example a door P, which, depending on its position, closes a door opening defined by a frame, for example a frame D, or on the contrary, leaves 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 lock comprises two U-shaped sections, nested one inside the other so as to define a closed enclosure inside which is housed an electromagnet 4 for creating a magnetic field to attract the counterplate 1 against the electromagnetic cup with a force greater than at least the maximum force a human is able to provide to open the door. In the closed chamber defined by the two U-shaped profiles, is also received an electrical control circuit 20 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 may be between 8 and 64 volts, for example 12 V, 24 V or 48V, intended to pass in a coil L of inductance of the electromagnet a magnetization current. This voltage range and voltage values are, however, given by way of example only, and other larger values of the voltage may be provided without departing from the scope of the invention.
    [0007] In the present application, 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.
    [0008] A switch 10 allows the circuit break. The switch 10 is connected to a control button of the opening of the door. In addition, a circuit module 22 consisting of two polarized capacitors 20 and 21 connected in series head spades, is connected in parallel across the inductance L of the electromagnet. This circuit module 22 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 breaking voltage pulse created by the opening 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 remanent magnetic field. 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 of a ferromagnetic material, for example metal, against the suction cup and prevents the opening of the door.
    [0009] 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. Closing the power supply by opening the switch creates a cut-off voltage pulse having a value equal to -Vm (see Figure 3). Preferably, 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, preferably, but without this being a necessity capable of limiting the scope of the invention, Vm is limited to a value greater than VO (as represented in FIG. 3). Almost simultaneously with the opening of the switch 20 and the interruption of the power supply, the capacitors 20 and 21 then carry out 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. As a result, the user can open the door without having to overcome the electromagnetic force resulting from the remanent magnetic field. During this charge-discharge cycle, both capacitors reverse their respective polarities and are available immediately for a new cycle.
    [0010] For example, for a supply of 12V respectively 24V, respectively 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 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. 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. value. In FIG. 3, the curve giving the voltage across the coil L is shown from a few moments before the switch 10 is opened. This curve is continuous, ie it does not comprise no discontinuity such as sudden jumps, from the switch off to to. At the instant to, the user presses the door opening button, switching on the switch in the open state. The voltage across the coil then drops very quickly creating a voltage pulse (of the order of lms) to a value Vm. This is the classic phenomenon of cut-off voltage. Varistor V limits the value Vm. The action of the modules 22 or 22 "in FIGS. 2 and 4 respectively has the effect of slowing down the rise of the curve (with respect to a conventional breaking voltage pulse) so that the voltage becomes zero again the first time at the end of a time interval AT 0 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. sufficient in the coil to cancel residual magnetism or remanence, in the preferable case where Vm is greater than Vo (for example between 1.5 times and 3 times Vo) the electric circuit (especially in the case where it has a modules 22 or 22 ") is such that the voltage returns to the value -Vo after an Ato time interval greater than 40ms, especially greater than 70ms. This provides a cancellation of the remanence effect in a time of the order of a tenth to a few tenths of a second, imperceptible to the user, which does not have the impression of having a force to overcome for to open the door. Then, the damping of the sinusoidal shape takes place in a few oscillations, in a time of a few thousandths of a second. In addition, after zero crossing at + ATo, the voltage is amortized sinusoidally around zero. In particular, the half oscillation period (Atl-ATo in FIG. 3) is of the order of 100 ms. At the end of a period of oscillation, the voltage is almost zero. In FIG. 4, there is shown a diagram of another electrical circuit, in particular an electronic circuit, for controlling the current flowing in the coil of the electromagnet. To form the electric current, 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 can be exemplary of 25, 100, 400 Ohms, respectively, 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. In addition, a circuit module 22 "in the form of a non-polarized capacitor 34 and a resistor R 'connected in series is connected across the inductor in parallel with it. for 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 cut-off voltage pulse created by the opening of the switch in 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 remnant magnetic field.
    [0011] The capacitor 34 and the resistor R 'may, for example and without the invention being limited to these values, have the characteristic values respectively 25V / 1000pF and 100 Ohms.
    [0012] 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 Figure 3 for the circuit of Figure 2 and has the same characteristics.
    [0013] In particular, from the point to, moment of opening of the switch, the intensity decreases along a slope such that the current becomes zero after a time interval of a few thousandths of a second. Once 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. At this moment, about a few thousandths of a second, 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. In the figures, the described embodiment provides for securing the plywood to the sash and the suction cup to the frame, but according to another embodiment forming part of the scope of protection of the present invention, provision can be made for In addition, whether it is the assembly of FIG. 2 or FIG. 4, the system functions in the same way when the polarities of the source of current 2 are reversed, only the directions of the currents respectively of magnetization and anti-remanence being reversed.
    权利要求:
    Claims (13)
    [0001]
    REVENDICATIONS1. An electromagnetic lock device comprising an electromagnetic suction cup (3) comprising an electromagnet (4), a counterplate (1) and an electric circuit comprising a source (2) of current for supplying at least one coil (L) of the electromagnet the electromagnetic plunger into an electric magnetization current to create an electromagnetic field and an associated electromagnetic force pressing against the plywood and the electromagnetic plunger to close the lock; interrupting means (10) for switching off the power supply; and anti-remanence means for combating the residual electromagnetic force which persists when the interruption means (10) has cut off the current supply (2) from the coil of the electromagnet, characterized in that the The electrical circuit is arranged so that the power source (2) is mounted directly across the at least one coil (L) so that when the interrupting means (10) interrupts the power supply. current, a cut-off voltage (-Vm) in the form of a pulse, in particular a negative pulse, appears at the coils of the coil and the electric circuit comprises means (22; 22 ") for delaying the zero crossing in return for the pulse, especially 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.
    [0002]
    2. Device according to claim 1, characterized in that there is provided means for limiting the maximum absolute value of the breaking voltage pulse, including means in the form of a varistor mounted across the at least one coil.
    [0003]
    3. Device according to claim 2, characterized in that the means for limiting the maximum absolute value limit the absolute value of the maximum voltage to a value greater than the supply voltage.
    [0004]
    4. Device according to one of claims 1 to 3, characterized in that the electrical circuit is arranged so that the voltage, after having passed once the zero return of the peak of the cutoff pulse, possibly damped by the limiting means, in particular the varistor, oscillates around zero by being damped, in particular by becoming substantially zero after one or two pulse periods.
    [0005]
    5. Device according to one of claims 1 to 4, characterized in that the electrical circuit comprises at least one capacitor (20, 21; 34).
    [0006]
    6. Device according to claim 5, characterized in that the electrical circuit comprises two capacitors (20, 21) biased in series mounted head to tail.
    [0007]
    7. Device according to claim 6, characterized in that the two capacitors (20, 21) in series are connected in parallel with the power supply (2) current. 25
    [0008]
    8. Device according to claim 6 or 7, characterized in that the two capacitors (20, 21) in series are connected in parallel with the coil (L) of inductance of the electromagnet (4) of the suction cup.
    [0009]
    9. Device according to claim 5, characterized in that the electrical circuit comprises a capacitor (34) unpolarized connected in series with a resistor (R '), connected in parallel with the at least one coil (L).
    [0010]
    10. Module forming an 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 device 10 according to one of the preceding claims, the module comprising means for delaying the zero crossing in return of the breaking voltage pulse from the power source of the circuit, 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.
    [0011]
    11. Module according to claim 10, characterized in that it comprises two polarized capacitors connected in series.
    [0012]
    12. Module according to claim 11, characterized in that the two capacitors are mounted head to tail. 25
    [0013]
    13. A door device comprising an opening (P) and a frame (D) and an electromagnetic lock device according to one of claims 1 to 9, one of the two elements of the electromagnetic lock device, namely the suction cup ( 3) electromagnetic and the counterplate (1), being fixed to the opening while the other of the two elements is fixed to the frame.
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    同族专利:
    公开号 | 公开日
    US20150211270A1|2015-07-30|
    FR3016914B1|2020-04-24|
    EP2899343A1|2015-07-29|
    ES2709007T3|2019-04-12|
    US10392840B2|2019-08-27|
    EP2899343B1|2018-10-31|
    PL2899343T3|2019-05-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    SU520631A1|1973-03-21|1976-07-05|Предприятие П/Я Г-4677|Device for forcing the active inductive load|
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    KR100652246B1|2005-07-20|2006-12-01|우리산업 주식회사|A electric power connection part of magnetic clutch field coil assembly connected with vehicle compressor|
    US20090262479A1|2008-04-21|2009-10-22|Tai-Her Yang|Electromagnetic actuating device being actuated by high voltage and held electrification by low voltage|US10937262B2|2017-08-30|2021-03-02|Sensormatic Electronics, LLC|Door system with power management system and method of operation thereof|
    US10943415B2|2017-08-30|2021-03-09|Sensormatic Electronics, LLC|System and method for providing communication over inductive power transfer to door|
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    法律状态:
    2016-01-20| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-09| PLFP| Fee payment|Year of fee payment: 4 |
    2018-02-08| PLFP| Fee payment|Year of fee payment: 5 |
    2019-02-05| PLFP| Fee payment|Year of fee payment: 6 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 7 |
    2021-02-09| PLFP| Fee payment|Year of fee payment: 8 |
    2022-02-10| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1400153|2014-01-24|
    FR1400153A|FR3016913A1|2014-01-24|2014-01-24|ANTI-REMANENCE DEVICE FOR ELECTROMAGNETIC LOCK|
    FR1400578A|FR3016914B1|2014-01-24|2014-03-10|ANTI-REMANENCE DEVICE FOR ELECTROMAGNETIC LOCK|FR1400578A| FR3016914B1|2014-01-24|2014-03-10|ANTI-REMANENCE DEVICE FOR ELECTROMAGNETIC LOCK|
    EP15152125.9A| EP2899343B1|2014-01-24|2015-01-22|Anti-remanence device for electromagnetic lock|
    PL15152125T| PL2899343T3|2014-01-24|2015-01-22|Anti-remanence device for electromagnetic lock|
    ES15152125T| ES2709007T3|2014-01-24|2015-01-22|Anti-retention device for electromagnetic lock|
    US14/603,507| US10392840B2|2014-01-24|2015-01-23|Anti-remanent device for an electromagnetic door lock|
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