• 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:

    公开号:FR3017754A1
    申请号:FR1451214
    申请日:2014-02-14
    公开日:2015-08-21
    发明作者:Daniel Chatroux；Bruno Beranger；Sebastien Carcouet
    申请人:Commissariat a lEnergie Atomique CEA；Commissariat a lEnergie Atomique et aux Energies Alternatives CEA；
    IPC主号:
    专利说明:

    [0001] The invention relates to a DC voltage power supply system, and in particular to a power supply system provided with contactors for the supply of a power supply. selectively supplying an electric charge and provided with a precharging function of a capacitor for filtering the electric charge. High voltage direct current electrical systems 10 are developing significantly. Indeed, many transport systems include a DC voltage supply system, for example based on electrochemical storage batteries. Connecting the power supply system to the load requires precautions to avoid inducing circuit damage. Thus, the connection of the power system to a load is via contactors. Contactors allow, for example, driving and cutting DC currents greater than 100 A with very low loss levels by withstanding a large number of connection / disconnection cycles. Conventionally, for safety reasons, the cutoff achieved by means of the contactors is bipolar: the plus and minus poles of the supply system are selectively connected to the load via respective contactors. Such contactors generally make it possible to isolate the power supply system with a galvanic isolation guaranteed by an electrical contact opening over a distance of several millimeters. In most applications, the electrical loads to be powered perform electronic switching. For example, inverters are most often used to power electric motors. To provide or absorb the current during switching, a filter capacitor is connected across the power supply system during power to the load. A capacitor is an energy storage in electrostatic form. The filter capacitor also called decoupling capacitor ensures a reserve of energy closer to the components used for switching. Thus, the current pulses can be supplied or absorbed by the capacitor with small voltage variations. A motor and its inverter are typically energized by the aforementioned contactors. In a transport motor application, these two contactors are used to feed the traction ICG10894-DD14977ST Depot Texte.doc only if the vehicle is able to start, and allow to cut the traction in case of defects. An inverter frequently includes 6 IGBT transistors constituting three switching arms and the motor is directly powered by this inverter.
    [0002] A decoupling capacitor is placed in parallel with the inverter. This capacitor is used for decoupling to minimize fluctuations in the supply voltage caused by fast switching of the transistors when they are closed or opened. The energy stored in the capacitor is: 1/2 C * U2, with C its capacity and U the voltage applied to its terminals by the power system. It is therefore not possible to directly close the contactors on the inverter, otherwise there will be a peak current of up to several thousand amps if the capacitor is discharged, with the risk of creating a dangerous surge on the inverter. for the hardware, because of the overvoltage caused by the parasitic inductance of wiring on the capacitor and the transistors. This becomes particularly problematic when the voltages at the terminals of the power system exceed a hundred volts. The wiring circuit between the power system and the decoupling capacitor is a series resonant circuit. The inductance is that of the wiring circuit, typically of the order of 1 pH per meter of length. The capacitance is essentially defined by the decoupling capacitor. The resistive circuit resistor series resistor is formed by parasitic resistances of the power system, the wiring and the capacitor.
    [0003] For high power applications, the impedance related to the parasitic inductance of the resonant circuit becomes significantly higher than the parasitic series resistance. This impedance determines the peak amplitude of the current and the resonance oscillation. For some voltage levels, the on-off current can be several thousand amperes. This current deteriorates the contacts of the contactors, and can even weld them together. The resonance overvoltage may be sufficient to destroy the decoupling capacitor and / or the powered electronic components. A precharge circuit is then used to overcome these problems. A precharging circuit has the function of carrying out a charge of the decoupling capacitor prior to the closing of the contactors. The contactor of the negative terminal of the power supply system is generally closed beforehand. The pre-charging circuit is connected in parallel with the contactor of the positive terminal of the power system. The precharging circuit typically includes a contactor connected in series with a power resistor, as described in WO2013128700. When the contactor of the precharging circuit is closed, this circuit is traversed by a strong current in order to carry out the charging of the decoupling capacitor. The power resistor is then suddenly solicited during charging and must be able to temporarily store the energy in the form of heat, which heat will then dissipate. The decoupling capacitor is charged for a preset time or until its voltage is close to the voltage supplied by the power system. The contactor of the positive terminal of the power system can then be closed and the precharge contactor can then be opened. The voltage across the decoupling capacitor is defined by an exponential load with a time constant. The time constant of this load is defined by t = R * C, where R is the value of the power resistance of the precharge circuit. The current peak is defined by E / R, with the voltage at the terminals of the power system. Usually, the precharge is maintained for a period of at least 3T to limit the difference between the voltage E and the voltage across the capacitor when closing the contactor of the positive terminal. If the decoupling capacitor does not charge, for example due to a power electronics fault or following an input short-circuit, the power resistance of the precharging circuit is continuously traversed by a current equal to R. The power resistance being dimensioned only to be traversed by this current value only transiently, this case results in its destruction, at the risk of a fire. A fuse is usually arranged in series with the power resistor to open the charging circuit prior to the destruction of this power resistance. However, the design of such a fuse is difficult and cases of thermal fatigue of such fuses have already been noted. The contactor of the precharging circuit must also have a breaking capacity at least equal to this current. Such a contactor is relatively difficult to achieve for direct current and is therefore both elaborate and expensive. The voltages E and U are not equal when closing the contactor of the positive terminal even in the absence of failure. In case of insufficient load of the decoupling capacitor or when the electric charge 35 consumes current from the precharging phase, if the contactor of the positive terminal is closed after a predefined duration of precharging, the difference between the voltages U and E can to be even more important, at the risk of damaging circuits. When closing the contactor of the positive terminal, the peak of current is then limited only by the resistors and inductances ICG10894-DD14977ST Depot Text.doc of the circuit. If the closing of the contactor of the positive terminal is conditioned by a minimum value of the voltage U, the consumption by the electric charge can prevent the voltage U from reaching a threshold value, so that the power resistance of the circuit of charge remains conductive continuously at the risk of inducing its destruction. Furthermore, during the precharging, the energy dissipated by the power resistance is at least equal to the energy stored in the decoupling capacitor, which leads to a loss of energy from the supply system.
    [0004] For some applications, the duration of the pre-charge phase is limited to one second or less to be undetectable by the user. The precharging circuit must then have a high power of the order of several kilowatts, with currents of the order of ten to a few tens of amperes for example. The power resistance must then withstand an even faster heating and important in the event of a short circuit fault. The invention aims to solve one or more of these disadvantages. The invention thus relates to an electrical system, which comprises: an electric charge capable of consuming a maximum current lm; a decoupling capacitor connected in parallel across the terminals of the electric charge; a DC voltage power supply system comprising first and second terminals for applying a supply voltage across the electrical load, including: a DC voltage source comprising first and second poles the second pole being connected to the second terminal of the power supply system; a first branch including a first contactor selectively connecting the first pole of the DC voltage source to the first terminal of the power supply system; a second branch including first and second switches and an inductance connected in series for selectively connecting the first pole of the DC voltage source to the first terminal of the power supply system; a unidirectional conduction device of the second terminal of the continuous supply system to a connection node between the second switch and said inductor; a control circuit comprising ICG10894-DD14977ST Depot Texte.doc - a power supply mode of the electric load in which it keeps the first contactor closed; a mode of charging of the decoupling capacitor in which it maintains the first open contactor, in which it maintains the first closed switch and in which it controls switching of the second switch so as to deliver a controlled current at a level greater than 1 m to through the inductor, into which it switches to the power supply mode of the electric load when it determines that the voltage between the first and second terminals exceeds a first threshold. According to a variant, the second switch includes a transistor controlled in switching mode by said control circuit. According to another variant, the first switch is an electromechanical switch.
    [0005] According to another variant, the second pole of the DC voltage source and the second terminal of the power supply system are selectively connected via a second contactor, said control circuit maintaining the second contactor closed in the second mode. supply of the electric charge and in the charging mode of the decoupling capacitor. According to yet another variant, the control circuit comprises a safety mode in which it maintains the first open contactor and the first open switch, said control circuit determining the duration of operation in load mode, and controlling the switchover to the security mode when said determined duration exceeds a second threshold. According to a variant, said control circuit is configured to measure the voltage between the first and second poles and configured to determine the first threshold by subtracting a predefined value from said measured voltage.
    [0006] According to another variant, the regulated current level of the charging mode results in the complete charging of the decoupling capacitor in a period of less than 3 seconds when said electric charge consumes the current lm. According to another variant, the DC voltage source applies a voltage greater than 100V between its poles. According to another variant, the first and second switches are connected in series between said first pole of the DC voltage source and said connection node. The invention also relates to a DC voltage power supply system for an electrical system as defined above, comprising first and second terminals for applying a power supply voltage to the power supply. terminals of the electrical load, including: a DC voltage source comprising first and second poles, the second pole being connected to the second terminal of the power supply system; a first branch including a first contactor selectively connecting the first pole of the DC voltage source to the first terminal of the power supply system; a second branch including first and second switches and an inductance connected in series for selectively connecting the first pole of the DC voltage source to the first terminal of the power supply system; a unidirectional conduction device of the second terminal of the continuous supply system to a connection node between the second switch and said inductor; a control circuit comprising a power supply mode of the electric load in which it maintains the first closed contactor; a mode of charging the decoupling capacitor in which it maintains the first open contactor, in which it maintains the first closed switch and in which it controls switches of the second switch so as to deliver a regulated current through the inductor to a higher than the maximum current 1m likely to be consumed by the electric charge, and in which it switches to the power supply mode of the electric charge when it determines that the voltage between the first and second terminals exceeds a first threshold.
    [0007] Other features and advantages of the invention will emerge clearly from the description which is given below, by way of indication and in no way limiting, with reference to the appended drawings, in which: FIG. 1 is a diagrammatic representation of a example of a vehicle 35 with an electric motor powered by a power supply system; FIG 2 is a schematic representation of a first embodiment of a power system according to the invention associated with an electric load; ICG10894-DD14977ST Depot Text.doc - Figure 3 illustrates voltage diagrams across a decoupling capacitor in two operating configurations; FIG. 4 illustrates current diagrams supplied by a power system in the same operating configurations as FIG. 3; FIG 5 is a schematic representation of a second embodiment of a power system according to the invention associated with an electric load; FIG. 6 is a timing diagram illustrating the current supplied by a power system as a function of control signals applied to a load switch; FIG 7 is a schematic representation of a third embodiment of a power system according to the invention associated with an electric load; FIG. 8 is a timing diagram illustrating the current supplied by a supply system as a function of different control signals. Figure 1 illustrates an example of a vehicle implementing an embodiment of a power system. The vehicle is an electric vehicle comprising, in a manner known per se, an electrical system including a power supply system 1 and an electric load 4. The supply system 1 here comprises a battery 2 including electrochemical accumulators 21 connected in series. series. The battery 2 comprises a large number of accumulators 21 connected in series, typically between 40 and 150 accumulators depending on the voltage required and the type of accumulator used. The voltage between the poles of the charged battery 2 is typically of the order of 400 V. The battery 2 applies a voltage + Vbat on a first pole, and a voltage -Vbat on a second pole. The accumulators 21 are connected in series via electrical power connections. The poles of the battery 2 are connected to the electric charge 4. In particular, the poles of the battery 2 are connected to a continuous interface of an inverter 42. An electric motor 43 is connected to an alternating interface of the inverter 42. A decoupling capacitor 41 is connected to the input interface of the inverter 42. The connection between the poles of the battery 2 and the continuous interface of the inverter 42 is carried out in this example by the intermediate of a protection circuit 6 and via a power coupling circuit 5. The protection circuit 6 may comprise, in a manner known per se, fuses configured to open the connection during a short-circuit. . The power coupling circuit 5 comprises contactors 51 and 52 for enabling ICG10894-DD14977ST Depot Text.doc to selectively connect / disconnect the poles of the battery 2 to the continuous interface of the inverter 42. The opening / closing of the Switches 51 and 52 are controlled by a control circuit 7, typically a supervision computer for the operation of the battery 2. The control circuit 7 is typically powered via a vehicle network power supply battery , having a voltage level much lower than that of the battery 2. FIG. 2 is a schematic representation of a first embodiment of a DC voltage power supply system 1 according to the invention, associated with the electric charge 4. The electric charge 4 comprises in particular an electrical consumer 44 may call an electric current from its power supply by the system 1. The condenser The power supply unit 1 comprises a DC voltage source 2 (typically a battery of electrochemical cells) having a positive pole and a negative pole. The power supply system 1 comprises first and second terminals 321 and 322 intended to be connected to the load 4 in order to apply to it a DC supply voltage. The power coupling circuit here comprises only a contactor 51, for the sake of simplification. The contactor 51 selectively connects the positive pole of the source 2 to the terminal 321 of the system 1. The connection between the negative pole of the source 2 and the terminal 322 here is devoid of contactor. The contactor 51 forms a first connecting branch between the positive pole of the source 2 and the terminal 321, this branch being intended to be traversed by the supply current of the source 2 after a precharge phase of the capacitor 41. A circuit 3 selectively carries out the interconnection between the positive pole of the voltage source 2 and the first terminal 321 of the system 1. The circuit 3 comprises in particular a switch 302, a switch 303 and an inductor 305 connected in series, for selectively connecting the pole positive of the source 2 and the terminal 321. The circuit 3 thus forms a second connecting branch between the positive pole of the source 2 and the terminal 321, connected in parallel with the first branch. The second branch is intended to perform a precharge of the decoupling capacitor 41, before the closing of the contactor 51. The circuit 3 further comprises a unidirectional conduction device of the terminal 322 to a connection node 323 between ICG10894-DD14977ST Depot Text. doc 303 switch and inductor 305. The unidirectional conduction device here comprises several diodes 307, 308 and 309 connected in series and whose anodes are connected to the lowest potential. The use of several diodes allows in a manner known per se to offer a breakdown resistance at high voltages without using oversize diodes. Such a series connection also provides redundancy against the most likely type of malfunction of one of the diodes, namely a short circuit. The circuit 3 further comprises a control circuit 304. The control circuit 304 comprises several modes of operation. The control circuit 304 comprises in particular a power supply mode of the electric charge 4, in which it keeps the contactor 51 closed and the switch 302 open. The control circuit 304 also comprises a charging mode of the decoupling capacitor 41, in which it keeps the contactor 51 open, and in which it keeps the switch 302 closed. In the charging mode, the control circuit 304 controls switches of the switch 303, so as to output a regulated current through the inductor 305. When the two branches are open and a power request of the charge 4 by the power supply system 1 is received, the control circuit 304 first operates in charging mode of the capacitor 41, before switching to the charging mode of the load 4. The electrical consumer 44 can be brought to call an electric current from the power supply mode of the electric charge. For example, the electric charge 4 may comprise an electric motor and a control circuit of the electric motor. The control circuit of the electric motor must then be supplied prior to the power supply of the electric motor itself. The maximum intensity that the electric consumer 44 is likely to consume will be designated by lm. The control circuit 304 is configured to regulate the current through the inductor 305 at a level Ir greater than this value 1m during the charging mode of the capacitor 41. Thus, even if the electrical consumer 44 achieves maximum current consumption as soon as possible. the charging mode of the capacitor 41, it is possible to guarantee a charge of the decoupling capacitor 41. When the control circuit 304 determines that the difference between, on the one hand, the voltage between the terminals 321 and 322 and, on the other hand, the voltage between the positive and negative poles of the source 2, is less than a first threshold, it switches to the supply mode of the load 4. The control circuit 304 then carries out the closing of the contactor 51 and the opening of the switch 302. This first threshold may for example be dimensioned in absolute value (by ICG10894-DD14977ST Depot Text.doc example 5 V) or as a percentage of the nominal voltage between the poles of the source 2 (for example 5%). To implement the current regulation, a probe 306 here measures the series current 11 flowing through the inductor 305. The value measured by the probe 306 is sent to the control circuit 304. The control circuit 304 regulates the average current flow. through inductance 305 at Ir = lm + Ig, with 1g a guaranteed minimum charge current value for capacitor 41. FIG. 3 is a diagram illustrating the voltage across capacitor 41 during a charging phase in two different operating conditions. FIG. 4 is a diagram illustrating the current delivered by the voltage source 2 in these two operating conditions. The dotted curve illustrates an operating condition in which the load 4 and the electrical consumer 44 in particular do not draw any current during the charging mode of the capacitor 41. The entire current 11 (regulated at a value Ir = lm + Ig) is applied to the capacitor 41, there is then a current Ic in the branch of the capacitor 41 such that Ic = 11. The voltage V across the capacitor 41 increases linearly with time. Assuming the voltage drops in the second branch to be zero when the switch 303 is closed, the voltage V reaches the voltage E between the poles of the source 2. As the current I called by the electrical consumer 44 is zero, the current delivered by the voltage source 2 becomes zero. The control circuit 304 then switches to the operating mode of supply of the load 4, closes the contactor 51 and opens the switch 302. These switches are then performed with zero potential differences between the terminals of the contactor 51 and between the terminals of the switch 302. The solid line curve illustrates an operating condition in which the electrical consumer 44 calls a non-zero current I during the charging mode of the capacitor 41. The average current 11 flowing through the inductor 305 is regulated at the value Ir. The charging current of the capacitor Ic is then Ir-1 = 11-1. The voltage V across the capacitor 41 increases linearly with time, but more slowly than in the previous operating condition. Assuming further voltage drops in the second branch as zero when the switch 303 is closed, the voltage V eventually reaches the voltage E between the poles of the source 2 later. The capacitor is charged. The current delivered by the voltage source 2 becomes equal to the current consumed by the electrical consumer I. The control circuit 304 then switches to the operating mode of supply of the load 4, closes the contactor 51 and opens the switch 302 ICG10894-DD14977ST Depot Text.doc These commutations are then carried out with zero potential differences between the terminals of the contactor 51 and between the terminals of the switch 302. Moreover, because of the commutations controlled by the control circuit 304 on the switch 303, the opening of the switch 302 can be performed at zero current, which allows to use a switch 302 with a breaking capacity of the DC current relatively reduced. The switch 302 may for example be an electromechanical switch with contacts in the air, which is not able to cut the DC current II. The current I called by the electrical consumer 44 is then provided via the contactor 51 10 of the first branch. Due to a linear charge of the capacitor 41 in the charging mode of the control circuit 304, the charging time of the capacitor 41 is greatly reduced. On the other hand, the second branch can dispense with series protection resistor with switches 302 and 303, so that most of the energy delivered by source 2 is used to recharge capacitor 41, so that losses by Joule effect are minimal in the charging mode. Since the energy efficiency for switching circuits is typically between 90 and 98%, a switch 303 thus controlled makes it possible to limit the losses during the charging of the capacitor 41. During the openings of the load mode switch 303 Freewheel current is established across the diodes 307-309 forming the unidirectional conduction device. The control circuit 304 may determine the occurrence of a malfunction when the voltage across the capacitor does not reach a sufficient voltage at the end of a predetermined time. In such a case, at the end of this period, the control circuit switches from the charging mode of the capacitor 41 to a safety mode, in which it keeps both the contactor 51 and the switch 302 open. For example, the predetermined duration will be set as the time required for the regulation current Ir to allow a complete charge of the capacitor 41 when the electrical consumer 44 consumes its maximum current lm. This duration will advantageously be less than 3 seconds to make the electric charge 4 quickly usable after a connection command 35 between the voltage source 2 and this electric charge 4. The switch 303 can typically be a transistor controlled in switching mode by the Circuit 304. The transistor can be controlled by ICG10894-DD14977ST Depot Text.doc the circuit 304 for example fixed frequency pulse width modulation, or variable frequency. To protect the second branch in the event of an overcurrent caused by a short-circuit on the switch 303, a fuse 301 is advantageously connected in series with the switches 302 and 303. The dimensioning of the circuit 3 essentially rests on the energy sizing of inductor 305. Depending on the capacitance of the capacitor 41 to be charged, the same circuit 3 may be used by changing the inductance 305 and adjusting the value of the control current of the control circuit 304. to obtain particularly advantageous performances, and this with components of very common use in the field of switching power supplies and relatively common sizing for the inductor 305, the switch 303, and the diodes 307 to 309. Moreover for a switch 303 in the form of a transistor, the use of the circuit 3 during a reduced charging time of the capacitor 41 makes it possible to use radiators of e heat dissipation of a limited dimension, or even to dispense with it. Likewise, it is possible to dispense with heat dissipation radiators for the inductor 305 and to minimize the cost and the size thereof by tolerating greater loss levels for example by choosing a higher magnetic excursion and / or or a current density in the higher windings. Conventionally, in a converter, the level of loss of the inductance is of the order of 1 to 2%. For the invention, a level of losses of 5 to 10% can be chosen for example. The invention still provides a greatly improved performance over prior art solutions for reduced size and cost of inductance. FIG. 5 is a schematic representation of a second embodiment of a DC voltage power supply system 1 according to the invention associated with the electrical load 4. The structure of the second branch and the device unidirectional conduction of the first embodiment is here repeated. The regulation of the current flowing through the inductor 305 in the charge mode of the capacitor 41 here uses a hysteresis control mode with variable frequency switching. The probe 306 measures the current flowing through the inductor 305. The current measured by the probe 306 is compared by a comparator 310 to thresholds. As illustrated in the diagram of FIG. 6, the switch 303 is open when the current It reaches a high threshold ih, and closed when the current It reaches a low threshold Ib. Due to the slope variations of the current ICG10894-DD14977ST Depot.doc in the inductor 305 during the charging of the capacitor 41, the circuit 3 is then at variable frequency. The average current supplied by the inductance is then (ih + ib) / 2.
    [0008] An embodiment not illustrated can implement a control with the control of the switch 303 by pulse width modulation. For this purpose, a current flowing through the inductor is measured by a probe. The value measured by the probe is applied to the input of an amplifier. The amplifier compares this measured value with a set current value.
    [0009] The amplifier generates an error value, which can be applied to a proportional / integral corrector. The output of this proportional / integral corrector can control the cyclic closing ratio of the switch 303. The switch 303 then operates at fixed frequency and variable duty cycle.
    [0010] FIG. 7 is a schematic representation of a third embodiment of a DC voltage power supply system 1 according to the invention, associated with the electrical load 4. The structure of the second branch and the device of FIG. Unidirectional conduction of the first embodiment is here repeated. Furthermore, the system 1 here comprises a contactor 52 selectively connecting the negative pole of the source 2 and the terminal 322, so that the power coupling circuit has a reinforced level of security. The regulation of the current flowing through the inductor 305 is here carried out in pulse width modulation in the current mode. The control circuit is here implemented in the form of a control circuit 311. The switch 303 is closed at a fixed frequency by the control circuit 311. The switch 303 here is an N-type MOS transistor. As shown in FIG. 8, the control circuit 311 closes the transistor 303 at each clock pulse and the control circuit 311 opens the transistor 303 when a current threshold lh crossing the transistor 303 is reached. The upper curve illustrates the current flowing through the inductor 305. The intermediate curve illustrates a clock signal. The transistor is turned on at the falling edge of the clock. The lower curve illustrates the current flowing through the transistor 303. A control circuit 311 implementing such a control mode is in particular diffused under the commercial reference UC3842. Such a control circuit performs a current reading through resistors. ICG10894-DD14977ST Depot Text.doc The switch 303 may be a transistor, for example of the Mosfet or bipolar type. Other types of switches 303 can of course be used, for example an IGBT transistor. Inductor 305 operates in practice for a relatively limited time. The inductor 305 can then be made with an iron powder toroid operating in a high field with a copper winding of relatively small section. In the previous examples, the circuit 3 forms a second interconnection branch in parallel with the contactor 51. It can also be envisaged that the circuit 3 forms a second interconnection branch in parallel with a contactor selectively connecting the negative pole of the source 2 at terminal 322. When the power coupling circuit 5 comprises contactors 51 and 52, the contactor having no branch in parallel is open beforehand during the disconnection between source 2 and load 4 , the circuit 3 can then remain powered. Then the other contactor having the branch in parallel is open. ICG10894-DD14977ST Depot Text.doc
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. Electrical system, characterized in that it comprises: an electric charge (42, 43) capable of consuming a maximum current lm; a decoupling capacitor (41) connected in parallel across the terminals of the electric charge; a DC voltage power supply system, comprising first and second terminals (321, 322) for applying a supply voltage across the electrical load, including: a DC voltage source (2) comprising first and second poles, the second pole being connected to the second terminal (322) of the power supply system; a first branch including a first contactor (51) selectively connecting the first pole of the DC voltage source to the first terminal (321) of the power supply system; a second branch including first and second switches (302, 303) and an inductor (305) connected in series for selectively connecting the first pole of the DC voltage source to the first terminal (321) of the power supply system; a unidirectional conduction device (307, 308, 309) of the second terminal of the continuous supply system to a connection node (323) between the second switch (303) and said inductor (305); a control circuit (304) comprising a power supply mode (42, 43) in which it maintains the first contactor (51) closed; a mode of charging the decoupling capacitor (41) in which it maintains the first open contactor, in which it maintains the first switch (302) closed and in which it controls switches of the second switch (303) so as to charge a regulated current at a level greater than 1m across the inductor (305), wherein it switches to the power supply mode of the electric load when it determines that the voltage between the first and second terminals exceeds a first threshold.
    [0002]
    The electrical system of claim 1, wherein the second switch (303) includes a transistor controlled in switching mode by said control circuit (304). ICG10894-DD14977ST Depot Text.doc
    [0003]
    The electrical system of claim 1 or 2, wherein the first switch (302) is an electromechanical switch.
    [0004]
    An electrical system as claimed in any one of the preceding claims, wherein the second pole of the DC voltage source and the second terminal of the power supply system are selectively connected via a second contactor (52), said control circuit (304) maintaining the second contactor closed in the power charging mode (42,43) and in the charging mode of the decoupling capacitor (41).
    [0005]
    Electrical system according to any one of the preceding claims, wherein the control circuit (304) comprises a safety mode in which it maintains the first contactor (51) open and the first switch (302) open, said circuit control (304) determining the duration of operation in charge mode, and controlling the switchover to the security mode when said determined duration exceeds a second threshold.
    [0006]
    An electrical system according to any one of the preceding claims, wherein said control circuit (304) is configured to measure the voltage between the first and second poles and configured to determine the first threshold by subtracting a predefined value from said first measured voltage.
    [0007]
    7. System according to any one of the preceding claims, wherein the regulated current level of the charging mode results in the complete charge of the decoupling capacitor in a period of less than 3 seconds when said electric charge (4) consumes the current lm. .
    [0008]
    8. Electrical system according to any one of the preceding claims, wherein the DC voltage source (2) applies a voltage greater than 100V between its poles.
    [0009]
    An electrical system according to any one of the preceding claims, wherein the first and second switches are connected in series between said first pole of the DC voltage source and said connection node.
    [0010]
    A DC voltage power supply system for an electrical system according to any one of the preceding claims, comprising first and second terminals (321, 322) for applying a supply voltage across the electrical load. , including: ICG10894-DD14977ST Depot Text.doc -a DC voltage source (2) comprising first and second poles, the second pole being connected to the second terminal (322) of the power supply system; a first branch including a first contactor (51) selectively connecting the first pole of the DC voltage source to the first terminal (321) of the power supply system; a second branch including first and second switches (302, 303) and an inductor (305) connected in series for selectively connecting the first pole of the DC voltage source to the first terminal (321) of the power supply system; a unidirectional conduction device (307, 308, 309) of the second terminal of the DC supply system (322) to a connection node (323) between the second switch (303) and said inductor (305); a control circuit (304) comprising a power supply mode (42, 43) in which it maintains the first contactor (51) closed; a mode of charging the decoupling capacitor (41) in which it maintains the first open contactor, in which it maintains the first switch (302) closed and in which it controls switches of the second switch (303) so as to charge a regulated current through the inductor (305) to a level higher than the maximum current lm likely to be consumed by the electric charge, and wherein it switches to the power supply mode of the electric charge when it determines that the voltage between the first and second terminals exceeds a first threshold. ICG10894-DD14977ST Depot Text.doc
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    同族专利:
    公开号 | 公开日
    FR3017754B1|2018-04-27|
    EP3105845A1|2016-12-21|
    US10164454B2|2018-12-25|
    WO2015121564A1|2015-08-20|
    EP3105845B1|2018-09-19|
    US20170047758A1|2017-02-16|
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    法律状态:
    2016-02-29| PLFP| Fee payment|Year of fee payment: 3 |
    2017-02-28| PLFP| Fee payment|Year of fee payment: 4 |
    2018-02-26| PLFP| Fee payment|Year of fee payment: 5 |
    2019-02-28| PLFP| Fee payment|Year of fee payment: 6 |
    2020-11-20| ST| Notification of lapse|Effective date: 20201006 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451214|2014-02-14|
    FR1451214A|FR3017754B1|2014-02-14|2014-02-14|CONTINUOUS VOLTAGE SUPPLY SYSTEM CONFIGURED TO PRECHARGE A FILTER CAPACITOR BEFORE FEEDING A LOAD|FR1451214A| FR3017754B1|2014-02-14|2014-02-14|CONTINUOUS VOLTAGE SUPPLY SYSTEM CONFIGURED TO PRECHARGE A FILTER CAPACITOR BEFORE FEEDING A LOAD|
    EP15705681.3A| EP3105845B1|2014-02-14|2015-02-03|Dc voltage supply system configured to precharge a smoothing capacitor before supplying a load|
    PCT/FR2015/050251| WO2015121564A1|2014-02-14|2015-02-03|Dc voltage supply system configured to precharge a smoothing capacitor before supplying a load|
    US15/118,749| US10164454B2|2014-02-14|2015-02-03|DC voltage supply system configured to precharge a smoothing capacitor before supplying a load|
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