• 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:
    A capacitor (4) is connected on the side of the half-bridge (30) conveying the largest current during a change of operating state of the relay (2). This increases the activation current of the relay.
    公开号:FR3036222A1
    申请号:FR1554326
    申请日:2015-05-13
    公开日:2016-11-18
    发明作者:Patrick Fulcheri
    申请人:STMicroelectronics Rousset SAS；
    IPC主号:
    专利说明:

    [0001] 1 Method for controlling a change in the operating state of an electromechanical member, for example a relay, and corresponding device Embodiments and embodiments of the invention relate to the control of an electromechanical member, for example example a bistable relay, a continuous motor, a watering programmer without these examples being limiting, having two operating states, for example an activated state and a deactivated state, and powered by a continuous power source, for example a battery or batteries rechargeable or not, and more particularly the control of the transition from a first operating state of said member to a second operating state and vice versa, for example the activation of the relay and its deactivation. Conventionally, the electromechanical member comprises an inductive element, such as a coil, connected between two transistor half-bridges fed by the DC power source, making it possible to circulate a current in the coil in one direction or the other according to that it is desired to move the member from its first operating state to its second operating state or vice versa, for example depending on whether it is desired to activate the relay or to deactivate it.
    [0002] Furthermore, generally, one of the currents, for example the activation current, generated by the power source is greater than the other, for example the deactivation current. The control of an electromechanical member comprising a coil through two half transistor bridges generally requires a relatively high power, for example of the order of 220 mW for a small bistable relay. And when using a low voltage power source, it is necessary to have a power source, for example a battery, having a low internal resistance as well as transistors having a low internal resistance to the state passing ("ON" state). And the smaller the size of the battery, the greater the internal resistance of it becomes significant.
    [0003] Currently for low power applications using low voltage power sources, one solution is to permanently connect a capacitor forming a power reservoir to the battery. However, such capacitors, generally low cost and several hundred microfarads, has significant leakage leading to permanent losses of current. Another solution is to use batteries of low internal resistance. However, such batteries are expensive or larger.
    [0004] Another solution is to use more expensive half bridges in order to lower their internal resistance in the on state. According to an embodiment and embodiment, it is proposed to efficiently control the transition from one operating state to another of an electromechanical component, even using small continuous power sources having non-negligible internal resistors and / or half-bridge transistors also having non-negligible internal resistances. According to an embodiment and embodiment, it is thus proposed to connect a capacitor on the side of the half bridge carrying the highest current to move the electromechanical member from one of these operating states to the other. , for example when activating a relay, and charging this capacitor before circulating said current in the relay coil, then discharging this capacitor through said coil so as to generate an additional current that will come add to the current generated by the DC power source. Thus according to one aspect there is provided a method of controlling the transition from a first operating state to a second state of operation of an electromechanical member and vice versa, wherein the passage of said member from its first operating state to its first state of operation. second operating state, for example the activation of a relay, comprises a circulation in an inductive element of said member 5 of a first current generated by a continuous supply and greater than a second current generated by said continuous supply and circulating in the sense inverse in said inductive element during the transition from the second operating state to the first operating state, for example when deactivating said relay.
    [0005] According to a general characteristic of this aspect, the passage from said first operating state to the second operating state comprises, prior to the flow of the first current, a charge of a capacitor and, simultaneously with the generation of the first current, a discharge of the capacitor. through said inductive element so as to circulate in said inductive element an additional current added to said first current. Furthermore, the passage of said second operating state to the first operating state comprises prior to the circulation of said second current, a discharge of said capacitor.
    [0006] Thus, the presence of this capacitor which makes it possible to circulate at least at the beginning of the activation of the relay an additional current in the coil of the electromechanical member, allows the use of small and inexpensive batteries. Furthermore, due to the presence of this additional current generated by the capacitor, the side of the half bridge carrying the highest current can be "low" that is to say having a resistance in the off state. negligible, which makes it possible to use low cost components or even fewer components since one can even use the output port of a conventional microcontroller in some cases.
    [0007] According to one embodiment, the method may further comprise an additional phase of discharging the capacitor after each passage of the electromechanical member from one of its two states to its other state.
    [0008] Such a phase thus makes it possible to save time during the transition from the second state to the first operating state (typically during the deactivation of the relay). Furthermore, the provision of this additional phase during the passage of the first operating state (typically during the activation of the relay) makes it possible to have a symmetrical behavior from one cycle to another, that is to say say during activation and deactivation. In another aspect, there is provided an electronic device, comprising a DC power source capable of generating a first current and a second current lower than the first current, an electromechanical member having an inductive element and having a first operating state and a second operating state, a control module powered by the power source and having a first control terminal and a second control terminal respectively connected to the two terminals of the inductive element and adapted to adopt a first configuration allowing a flowing the first current from the first control terminal to the second control terminal so as to move said member from its first operating state to its second operating state and a second configuration permitting circulation of the second current of the second terminal. command to the first terminal of co in order to move said member from its second operating state to its first operating state, and a capacitor. Said control module is also able to adopt, prior to the first configuration, a first initial configuration allowing said capacitor to be charged and then, at its first configuration, to allow at least a partial discharge of the capacitor through said inductive element so as to circulating an additional current in addition to said first current, and 3036222 5 adapted to adopt before the second configuration a second initial configuration allowing a discharge of said capacitor. According to one embodiment, the DC power source 5 comprises a positive terminal and a negative terminal, the capacitor is connected between the first control terminal and said negative terminal, and the control module comprises a first switch and a second switch. connected in series between the positive terminal and the negative terminal of the voltage source and having a first common node forming said first control terminal, a third switch and a fourth switch connected in series between the positive terminal and the negative terminal of the voltage source and having a second common node forming said second control terminal, and control means configured to - close the first switch and open the other switches so as to place the control module in its first initial configuration and then close the first and fourth 20 switches and open the other switches of Place the control module in its first configuration, and - Close the second switch and open the other switches so as to place the control module in its second initial configuration then close the second and third switches and open the other switches. way to place the control module in its second configuration. According to one embodiment, the control module is further adapted to adopt a terminal configuration, after the first configuration and the second configuration, allowing a discharge of said capacitor. Thus, the control means are for example configured to close the second switch and open the other switches so as to place the control module in its terminal configuration.
    [0009] Other advantages and features of the invention will appear on examining the detailed description of embodiments and embodiments, in no way limiting, and the accompanying drawings, in which: FIGS. 1 to 7 illustrate schematically modes of implementation and embodiment of the invention. In FIG. 1, the reference DIS designates an electronic device comprising a DC power source 1, for example a battery or batteries, rechargeable or not, delivering a + V vacuum voltage. 2 denotes schematically an electromechanical member, for example a relay, comprising an inductive element BB such as a coil, having two terminals A1 and A2. The device DIS further comprises a control module 3 powered by the power source 1 and having a first control terminal N1 and a second control terminal N2 respectively connected to the two terminals A1 and A2 of the inductive element BB. In this exemplary embodiment, the control module 3 comprises a first transistor half-bridge comprising a first switch 300, here a PMOS transistor, and a second switch 301, here an NMOS transistor, connected in series between the positive terminal. B + and the negative terminal B- (the ground) of the voltage source 1. The first control terminal N1 is formed by the two connected drains of the two transistors 300 and 301. The control module 3 also comprises a second half transistor gate 31 comprising here a third switch 310, for example a PMOS transistor, and a fourth switch 311, for example an NMOS transistor, connected in series between the positive terminal B + and the negative terminal B of the source of continuous supply 1. The second control terminal N2 is formed by the two connected drains of the transistors 310 and 311.
    [0010] The four transistors 300, 301, 310 and 311 are controlled on their respective gates by control signals delivered by control means 32 which may for example be implemented in a software manner within a microcontroller.
    [0011] In addition to the means just described, the device DIS also comprises a capacitor 4 having a first terminal 40 connected to the first control terminal N1 as well as to the first terminal A1 of the coil BB and a second terminal 41 connected. to the negative terminal B- of the power supply.
    [0012] As will be seen in more detail below, the control module 3 and the capacitor 4 are intended to control the transition from a first operating state to a second operating state of the electromechanical member 2. When this The electromechanical member is for example a relay, the first operating state is for example a deactivated state and the second operating state is then an activated state. The transition from the first operating state to the second operating state therefore corresponds to the activation of the relay while the transition from the second operating state to the first operating state corresponds to the deactivation of the relay. The passage of the electromechanical member 2 from one operating state to another comprises a flow of a current in the inductive element BB. And, usually, one of the currents is superior to the other.
    [0013] This is particularly the case when the electromechanical member is a bistable relay. Indeed, the current required for the activation of the relay is generally greater than that required for its deactivation since during activation, the magnetic space is larger and the permanent magnetic flux is weak while at the deactivation. , the magnetic space is zero since the relay is glued and it is only necessary to cancel the permanent magnetic flux to take off the relay, that is to say the disable. In the example described here, the activation of the relay will result in a current flowing in the coil BB from the terminal A1 to the terminal A2 A2 while the deactivation will result in a current flowing in the coil of the terminal A2 to the A1 terminal. Also, since the activation current is greater than the deactivation current, the capacitor 4 is connected at the first control terminal N1, i.e. the half bridge side to convey the strongest current. Reference will now be made more particularly to FIGS. 2 to 7 to illustrate an example of operation of the device DIS of FIG. 1.
    [0014] FIGS. 2 to 4 relate to the activation of the electromechanical relay 2, that is to say when the relay goes from its first operating state (deactivated state) to its second operating state (activated state). Referring now more particularly to FIG. 2, it can be seen that the control module 3 adopts a first initial configuration in which the first switch 300 is closed (passing transistor) while the other switches 301, 310 and 311 are open (blocked transistors). This first initial configuration allows a charge of the capacitor 4 by a current I1 delivered by the DC power supply 1. The person skilled in the art will be able to adjust the time required for placing the control module in this first initial configuration to charge the capacitor. . This, of course, depends on the size of the capacitor. Thus, for a capacitor having a capacitive value of between ten microfarads and a few hundred microfarads, the charging time may be of the order of a few milliseconds to several tens of milliseconds.
    [0015] Then, as shown in FIG. 3, the control module adopts a first configuration in which the first switch 300 and the fourth switch 311 are closed and the other switches 301 and 310 are open.
    [0016] In this first configuration, the battery 1 forms with its internal resistance and the internal resistance of the transistor 300 in the on state a first current source, and the capacitor 4 which has been charged with the no-load voltage + V of the battery, forms with its 5 internal impedance weak a second current source. These two current sources are in parallel. And, at the beginning, the current source formed by the capacitor 4 and its low impedance is preponderant with respect to the current source formed by the battery, its internal resistance and the internal resistance of the transistor 300. As a result, the capacitor 4 can discharge through the coil BB to provide an additional current 12 which will be added to the current 13 delivered by the battery 1. The resulting current 14 having passed through the coil BB then discharges to ground via the transistor 311 .
    [0017] The capacitor 4 discharges to the point of equilibrium of the voltages and at that moment only the current 13 delivered by the battery flows in the coil BB. Thus, the capacitor 4 has, during the activation of the relay, provide at startup an additional current, which makes it possible to mitigate the possible negative effects due to excessive internal resistance of the battery and / or the transistor 300 Referring now to FIG. 4, it can be seen that the activation cycle ends preferentially with a discharge from capacitor 4 to ground (discharge current 140).
    [0018] In this regard, the control module 3 adopts a terminal configuration allowing the discharge of the capacitor 4. In this terminal configuration, the control means 32 close the second switch 301 and open the other switches 300, 310 and 311.
    [0019] Again, the switch 301 is left open for sufficient time to allow efficient discharge of the capacitor 4. As an indication, a few milliseconds may be required.
    [0020] Then, the control means 32 place the control module in a state of rest in which all the switches 300, 301, 310 and 311 are open (blocked transistors). Reference will now be made more particularly to FIGS. 5 to 7 to illustrate an example of operation of the DIS device when the relay is deactivated. For this deactivation, the control means 32 place the control module in a second initial configuration shown in FIG. 5, in which it controls the second switch 301 so as to turn it on to allow a discharge of the capacitor 4 (current of discharge 15). Indeed, this ensures that the capacitor 4 is empty before proceeding to the actual deactivation of the relay. Then, as illustrated in FIG. 6, the control means 32 place the control module in a second configuration in which the third switch 310 and the second switch 301 are closed while the other switches 300 and 311 are open. As a result, a current 16 delivered by the supply source 1 20 flows in the coil BB from the terminal A2 to the terminal A1 and this current 16 is then subdivided at the beginning of the deactivation phase into a current 17 charging the capacitor 4 and a current 18 evacuating to ground. The capacitor 4 will charge to the point of equilibrium of the voltages and at that moment the current 17 vanishes and only the current 18 remains. Then, as illustrated in FIG. 7, the control means 32 again place the control module 3 in its terminal configuration in which the transistor 301 is conducting, so as to discharge the capacitor 4 via the discharge current 19. Then , the control means again place the control module in its state of rest in which all the switches are open.
    [0021] The size of the capacitor 4 depends on the characteristics of the electromechanical member. However, a capacitor having the capacitive value mentioned above (a few tens of microfarads to a few hundred microfarads) can activate or deactivate a bistable relay of a few tens of milliwatts. It will be noted here that the capacitor 4 does not consume current outside the active phases of activation and deactivation. In fact, apart from these phases, when the control module is in the idle state, the capacitor 4 is electrically isolated from the battery 10 1. Consequently, any leaks from the capacitor are of no importance, which makes it possible to use a low cost capacitor. On the other hand, since the capacitor 4 makes it possible to have a half bridge 30 having a mediocre internal resistance in the on state, it would be entirely possible to use as transistors 300 and 301, the transistors integrated in the output port of a transistor. microcontroller. But, of course, in the case where a large power is required for the activation and deactivation of the relay, it would still be necessary to provide transistors 300 and 301 of appropriate size and which would then be external to the microcontroller 32.
    权利要求:
    Claims (6)
    [0001]
    REVENDICATIONS1. A method of controlling the transition from a first operating state to a second operating state of an electromechanical member (2) and vice versa, wherein the passage of said member (2) from its first operating state to its second operating state comprises a circulation in an inductive element (BB) of said member of a first current (13) generated by a continuous supply (1) and greater than a second current (16) generated by said continuous supply and circulating in the opposite direction in said element inductive (BB) during the transition from the second operating state to the first operating state, characterized in that the passage from said first operating state to the second operating state comprises prior to the flow of the first current (13), a load of a capacitor (4) then, simultaneously with the generation of the first current (13), at least a partial discharge of the capacitor (4) through the inductive element (BB) so as to circulate in said inductive element an additional current (12) added to said first current (13), and the passage of said second operating state to the first operating state comprises prior to the circulation of said second current (16), a discharge of said capacitor (4).
    [0002]
    2. The method of claim 1, further comprising an additional phase of discharging the capacitor (4) after each passage of the member of one of its two states to its other state.
    [0003]
    Electronic device, comprising a continuous power source (1) able to generate a first current (13) and a second current (16) lower than the first current (13), an electromechanical member (2) comprising an inductive element ( BB) and having a first operating state and a second operating state, a control module (3) powered by the supply source and having a first control terminal (N1) and a second control terminal (N2). ) respectively connected to the two terminals (A1, A2) of the inductive element (BB) and adapted to adopt a first configuration allowing a flow of the first current (13) of the first control terminal (N1) to the second terminal of control (N2) so as to move said member from its first operating state to its second operating state and a second configuration permitting circulation of the second current (16) of the second terminal control (N2) to the first control terminal (N1) so as to pass said member from its second operating state to its first operating state, characterized in that it further comprises a capacitor (4) and in that said control module (3) is further adapted to adopt, prior to the first configuration, a first initial configuration allowing said capacitor (4) to be charged and then to allow at least a partial discharge of the capacitor during its first configuration (4) through said inductive element (BB) so as to circulate an additional current (12) added to said first current (13), and adapted to adopt, prior to the second configuration, a second initial configuration allowing a discharging said capacitor (4).
    [0004]
    4. Device according to claim 3, wherein the DC power source (1) comprises a positive terminal (B +) and a negative terminal (W), the capacitor (4) is connected between the first control terminal (N1). ) and said negative terminal (W), and the control module (3) comprises a first switch (300) and a second switch (301) connected in series between the positive terminal and the negative terminal of the voltage source and having a first common node forming said first control terminal (N1), a third switch (310) and a fourth switch (311) connected in series between the positive terminal and the negative terminal of the voltage source and having a second common node forming said second control terminal (N2), and control means (32) configured to close the first switch (300) and open the other switches so as to place the control module in its first configuration; nitiale, then close the first and fourth switches (300, 311) and open the other 5 switches so as to place the control module in its first configuration, and to close the second switch (301) and open the other switches so as to place the control module in its second initial configuration then close the second (301) and third (310) switches and open the other switches so as to place the control module in its second configuration.
    [0005]
    An apparatus according to claim 3 or 4, wherein the control module is further adapted to assume a terminal configuration subsequent to the first configuration and the second configuration, permitting discharge of said capacitor (4).
    [0006]
    6. Device according to claims 4 and 5, wherein the control means are configured to close the second (301) 20 switch and open the other switches so as to place the control module in its terminal configuration.
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    同族专利:
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    DE102015120351A1|2016-11-17|
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    引用文献:
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    法律状态:
    2016-04-21| PLFP| Fee payment|Year of fee payment: 2 |
    2016-11-18| PLSC| Search report ready|Effective date: 20161118 |
    2017-04-21| PLFP| Fee payment|Year of fee payment: 3 |
    2018-04-23| PLFP| Fee payment|Year of fee payment: 4 |
    2019-04-19| PLFP| Fee payment|Year of fee payment: 5 |
    2021-02-12| ST| Notification of lapse|Effective date: 20210105 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1554326A|FR3036222B1|2015-05-13|2015-05-13|METHOD FOR CONTROLLING A CHANGE IN THE OPERATING STATE OF AN ELECTROMECHANICAL MEMBER, FOR EXAMPLE A RELAY, AND CORRESPONDING DEVICE|FR1554326A| FR3036222B1|2015-05-13|2015-05-13|METHOD FOR CONTROLLING A CHANGE IN THE OPERATING STATE OF AN ELECTROMECHANICAL MEMBER, FOR EXAMPLE A RELAY, AND CORRESPONDING DEVICE|
    DE102015120351.0A| DE102015120351A1|2015-05-13|2015-11-24|METHOD FOR CONTROLLING A CHANGE IN OPERATING STATUS OF AN ELECTRONIC ORGAN; For example, a RELAY, AND APPROPRIATE DEVICE|
    CN201510846128.4A| CN106160063B|2015-05-13|2015-11-26|For controlling the method and relevant device that the mode of operation of electromechanical component changes|
    CN201520963521.7U| CN205565758U|2015-05-13|2015-11-26|A electronic equipment that is used for mode of operation who controls electromechanical parts to change|
    US14/960,546| US10170258B2|2015-05-13|2015-12-07|Method for controlling a change of operating state of an electromechanical component and corresponding device|
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