• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    The subject of the invention is a DC to DC voltage converter with three phases, in particular for an electric or hybrid vehicle, said converter comprising a plurality of resonant circuits. First inductive elements (L1, L2, L3) of the resonant circuits are coupled together and primary windings (P1, P2, P3) of the transformers of each resonant circuit are coupled together.
    公开号:FR3084797A1
    申请号:FR1857151
    申请日:2018-07-31
    公开日:2020-02-07
    发明作者:Boris Bouchez
    申请人:Valeo Siemens eAutomotive Norway AS；
    IPC主号:
    专利说明:

    CONTINUOUS-CONTINUOUS TO RESONANCE VOLTAGE CONVERTER
    TECHNICAL FIELD AND OBJECT OF THE INVENTION In general, the invention relates to a DC-DC voltage converter with resonance, in particular in the field of electrical systems, more particularly intended for recharging a supply battery. , in particular intended to be embedded in a motor vehicle, such as a motor vehicle with an electric or hybrid motor.
    More specifically, in the context of an electric or hybrid vehicle comprising a low voltage supply battery for supplying electrical equipment to the vehicle and a high voltage supply battery for participating in the propulsion of the vehicle, It is known that an on-board charger, commonly designated by a person skilled in the art under the acronym OBC for "On Board Charger" in English, comprising a DC-DC resonance voltage converter, is used for recharging the high voltage supply battery.
    The invention thus relates to a DC-DC voltage converter with resonance as well as an electric charger comprising such a converter. The electric charger is in particular embedded in an electric or hybrid vehicle in particular to allow the electric charging of a high voltage supply battery of the vehicle and / or the supply of electric energy by said high voltage supply battery to the outside the vehicle, for example to an electrical network, equipment or building.
    STATE OF THE ART As is known, an electric or hybrid motor vehicle comprises an electric motorization system, powered by a high voltage supply battery via a high voltage on-board electrical network, and a plurality of auxiliary electrical equipment. powered by a low voltage power supply battery via an on-board low voltage electrical network. Thus, the high voltage power supply battery provides a power supply function for the electric motorization system enabling the vehicle to be propelled. The low voltage supply battery supplies auxiliary electrical equipment, such as on-board computers, window lift motors, a multimedia system, etc. The high-voltage supply battery typically delivers a voltage between 100 V and 900 V, preferably between 100 V and 500 V, while the low-voltage supply battery typically delivers a voltage of around 12 V, 24 V or 48 V. These two high and low voltage supply batteries must be able to be charged.
    Electric energy recharging of the high-voltage power supply battery is carried out in a known manner by connecting it, via a direct high-voltage electrical network of the vehicle, to an external electrical power network, for example the alternative electrical network. domesticated. To this end, the high-voltage power supply battery is able to be connected to the domestic AC power supply network, for its charge, via an on-board electric charger, designated OBC.
    In a known solution, such an on-board charger mainly comprises a power factor correction circuit, called PFC (for "Power Factor Correction" in English), and a DC-DC voltage converter with resonance allowing in particular to realize the galvanic isolation between the AC network and the DC network. In an electric or hybrid vehicle application, it may be necessary to use several DC-DC voltage converters in order to achieve the necessary power, for example by connecting them in parallel. However, such an arrangement may require the use of filters which cause the components to overheat. A known method to overcome this drawback consists in interleaving the DC-DC voltage converters, as shown in FIG. 1 by way of example for three converters forming a set 1 of converters. Such interleaving makes it possible to control the converters at the same frequency. When a plurality of DC-DC voltage converters of the LLC type are interleaved in order to control them at the same frequency, it can be seen that each converter remains independent of the others in terms of dispersion of the components, which can lead to different currents in voltage converters. Consequently, one of the converters can wear out more quickly than the others, which can lead to malfunction of all the converters and therefore has a significant drawback.
    There are several topologies of DC-DC voltage converter with resonance. Among these topologies, there are in particular LLC type converters. Such converters comprise in known manner a transformer, comprising a primary part and a secondary part; a capacity ; two coils; and switches which are switched so as to allow the conversion of a first direct voltage supplied to the primary part into a second direct voltage supplied by the secondary part. In order to reduce the switching losses of the switches, it is known to add a capacity in parallel with each switch, such a configuration allowing zero voltage switching operation called “ZVS” (Zero-Voltage Switching) by those skilled in the art. job. In an LC type circuit, in which Lr denotes the inductive element, for example a coil, and Cr the resonant capacity, operation in ZVS cannot be implemented permanently in high voltage applications. Indeed, such an operation in ZVS requires storing energy in the coil Lr. However, at voltage values of 400 V or higher, at which such DC-DC voltage converters with resonance operate in electric or hybrid vehicles these days, the energy passing through the switches is such that it can no longer be fully stored in the coil Lr, which results in switching losses at the switches. An LLC type circuit allows these drawbacks to be partially remedied, since the addition of a second inductive element, denoted Lm, makes it possible to store additional energy compared to an LC type circuit. However, when the second inductive element is integrated in the primary part of the transformer, the energy storage requires a particular configuration of the transformer, the latter not being originally adapted to store energy. Also, in order to allow the primary part of the transformer to store energy, it is known to make an air gap in the core of the transformer, in particular in the primary part. In doing so, it makes the transformer more complex and more expensive to manufacture, increases electromagnetic disturbance, and can produce side effects known as "fringing effects" by those skilled in the art which can cause heat loss.
    There is therefore a need for a simple, reliable and efficient solution for an electric charger which makes it possible to at least partially remedy these drawbacks.
    GENERAL PRESENTATION OF THE INVENTION To this end, the invention firstly relates to a continuous voltage converter with resonance, in particular for recharging a supply battery, in particular for an electric or hybrid vehicle, said converter comprising a plurality of resonant circuits, each resonant circuit comprising:
    - a first inductive element,
    - a resonance capacity connected to said first inductive element,
    a transformer comprising at least one primary winding and at least one secondary winding, said first inductive element, the resonant capacity and the primary winding of the transformer being included in a branch of the resonance circuit, called a "resonance branch", converter in which on the one hand, the first inductive elements of the resonant circuits are coupled together, and in that, on the other hand, the primary windings of the transformers of the resonant circuits are coupled together.
    The coupling of the primary inductive elements between them and the primary windings between them thus makes it possible to limit the variations in current of one phase with respect to another at low levels, in particular less than 10%. In particular, each resonant circuit is at least of the LC type. The converter according to the invention thus has in particular a size, a weight and a cost of the electromagnetic compatibility filters limited whatever the operating range of the converter, that is to say whatever the couple input voltage- converter output voltage. The resonant circuits are intertwined in particular.
    Preferably, the transformer of each resonant circuit comprises a second inductive element, preferably an induction coil, in particular connected in parallel with the primary winding in order to form a resonant circuit of the LLC type.
    More preferably, the second inductive elements are coupled together in order to limit the variations in current of one resonant circuit with respect to another.
    According to one aspect of the invention, the first inductive elements and the second inductive elements are induction coils.
    Advantageously, the resonance branches of the transformers are connected at the same point called "first neutral point".
    Preferably, said first neutral point is connected to ground at the primary side of the DC-DC converter via a branch comprising at least one impedance configured to store energy and allow switching of the switch voltage to zero. resonant dc-dc converter. In particular, said impedance may include one of a resistor, a coil and / or a capacitor in order to allow energy storage for the currents whose harmonics are multiple of rank n (where n is the number of resonant circuits). The resonant DC-DC voltage converter can thus operate in ZVS regardless of the load applied at the converter output. In particular, said impedance comprises an inductor in series with a capacitance. By the term "output" is meant the terminals of the converter located on the side of the supply battery to be recharged. This characteristic is particularly suitable for the case where the DC-DC voltage converter with resonance is an LC converter because it makes it possible to operate in ZVS whatever the operating point of the converter.
    Advantageously also, branches, each comprising one of said secondary windings of the transformers are connected at the same point called "second neutral point".
    Preferably, said second neutral point is connected to ground on the secondary side of the DC-DC converter via a branch comprising at least one impedance configured to store energy and allow switching of the switch voltage to zero. resonant dc-dc converter. In particular, said impedance may include one of a resistor, a coil and / or a capacitor in order to allow the operation of the converter to ZVS in the direction of energy transfer from the secondary to the primary. In particular, said impedance comprises an inductor in series with a capacitance. According to one embodiment, the neutral point is configured so as to present a floating electrical potential. In particular, the first neutral point is configured so as to present a floating electrical potential. This is particularly the case when the first neutral point is connected only to the resonance branches of the resonant circuits. The first inductive element and the resonance capacity already make it possible to implement zero-voltage switching of switches of said converter, in particular when the voltage converter transfers energy from primary to secondary. By leaving the first neutral point floating, the number of components in the resonant DC-DC voltage converter is limited. In particular, the second neutral point is configured so as to present a floating electrical potential. This is particularly the case when the second neutral point is connected only to branches comprising the secondary windings of the transformers of the resonant circuits. The potential of the second neutral point can in particular be left floating when the DC-DC voltage converter with resonance is intended to exchange energy only from primary to secondary and not from secondary to primary, that is to say when the resonant DC-DC voltage converter is not intended to operate bidirectionally. This limits the number of components in the resonant DC-DC voltage converter. In addition, the presence of a harmonic current of rank n is avoided, where n is the number of resonance circuits, which makes it possible to limit the losses in the DC-DC converter with resonance and to limit the effective value of the output current.
    Preferably, at least a first resonant circuit of the converter comprises a half-bridge input structure comprising a high switch and a low switch connected at a midpoint, said midpoint being connected to the branch of resonance of said first resonant circuit.
    In one embodiment, each resonant circuit comprises a half-bridge input structure comprising a high switch and a low switch connected at a midpoint, said midpoint being connected to the respective resonance branch of said resonant circuit.
    In one embodiment, the converter comprises n resonant circuits, n being a natural integer greater than or equal to two, and a number p, p being a non-zero natural integer strictly less than n, said resonant circuits comprises a structure half-bridge input comprising a high switch and a low switch connected at a midpoint, said midpoint being connected to the respective resonance branch. Said converter is configured so that in one operating mode:
    said switches of the p resonant circuits periodically switch so as to transmit energy through the resonant circuits,
    - the resonance branches of the n-p other resonant circuits being either in open circuit or either connected to a ground of the resonant DC-DC converter, during the duration of this operating mode.
    Typically, in resonant voltage converters, the frequency of the converter switches must vary over a wide range in order to obtain a wide range of output voltages from a given input voltage. For example, the frequency can vary from 100 kHz to 1 MHz to obtain a voltage interval of 200 to 500 V from an input voltage of 420 V. This constrains the choice of switches usable in the voltage converter, complicates the strategies for controlling the switches of the voltage converter, and is not very efficient in terms of efficiency of the voltage converter. The numbers n and p are used to address a respective operating range.
    According to a variant, the DC-DC voltage converter with resonance comprises a control unit, said control unit being configured to control the switches of the np resonant circuits in order to put them either in open circuit during the duration of said mode of or in connection with the ground of the resonant DC-DC converter, in particular with the ground on the primary side, for the duration of this operating mode.
    According to one aspect of the invention, at least one of the resonant circuits, preferably each resonant circuit, comprises a half-bridge output structure comprising a high diode and a low diode connected at a point middle, said midpoint being connected to the secondary winding of the transformer of said resonant circuit. Alternatively, the diodes can be replaced by switches, in particular transistors.
    Preferably, the plurality of primary windings is galvanically isolated from the plurality of secondary windings so as not to make an electrical connection between the two.
    The invention also relates to an electric charger, in particular for an electric or hybrid vehicle, comprising a converter as presented above.
    The invention also relates to an electric or hybrid vehicle comprising a DC-DC voltage converter as presented above.
    PRESENTATION OF THE FIGURES The invention will be better understood on reading the description which follows, given solely by way of example, and referring to the attached drawings given by way of nonlimiting examples, in which identical references are given to similar objects and on which:
    FIG. 1 represents an example of an electrical circuit comprising three interlaced resonant DC-DC converters of the prior art,
    - Figure 2 shows a first embodiment of a converter according to the invention, Figure 3 shows a second embodiment of a converter according to the invention, Figure 4 shows a third embodiment of a converter according to the invention,
    FIG. 5 represents a fourth embodiment of a converter according to the invention,
    - Figure 6 shows a fifth embodiment of a converter according to the invention.
    It should be noted that the figures show the invention in detail to implement the invention, said figures can of course be used to better define the invention if necessary.
    DETAILED DESCRIPTION OF THE INVENTION In the description which will be given below, the invention will be described in its application to an electric or hybrid motor vehicle without this being limiting of the scope of the present invention.
    For example, such a vehicle may include in particular an electric machine, an inverter, a set of converters, a high-voltage power battery, an on-board high-voltage electrical network, a low-voltage power battery, an electrical network low voltage onboard and a plurality of auxiliary electrical equipment.
    The set of converters according to the invention is described below in its implementation for an electric charger, in particular on board a vehicle, without however this limiting the scope of the present invention. It should be noted that the set of converters could be a DCDC converter on board the vehicle.
    The low-voltage on-board electrical network connects the low-voltage supply battery and the plurality of auxiliary electrical equipment so that the low-voltage supply battery supplies said auxiliary electrical equipment, such as on-board computers, lift motors - windows, a multimedia system, etc. The low voltage supply battery typically delivers for example a voltage of the order of 12 V, 24 V or 48 V. The low voltage battery is recharged from the high voltage battery via a DC voltage converter in DC voltage, commonly called DC-DC converter.
    The high-voltage on-board electrical network connects the high-voltage supply battery and the inverter so that the high-voltage supply battery provides a power supply function for the electric machine via the inverter. The high-voltage supply battery typically delivers a voltage of between 100 V and 900 V, preferably between 100 V and 500 V. Recharging of electrical energy from the high-voltage supply battery is carried out by connecting it, via the network. direct high voltage electric vehicle, to an external electrical network, for example the domestic alternative electrical network.
    The electric machine is a rotary electric machine, preferably intended to drive the wheels of the vehicle from the energy supplied by the high-voltage power supply battery. More specifically, the electric machine is an electric machine with alternating current supplied by a source of polyphase currents. For example, the electric machine can be an AC motor. In the preferred example described below, the electric machine is powered by a source of three-phase currents without this being limiting of the scope of the present invention.
    In this example, the control of the electric machine is carried out by means of the inverter. Said inverter makes it possible to convert the direct current supplied by the high-voltage supply battery into three alternating control currents, for example sinusoidal. In other words, the inverter's function is to transform the direct current delivered by the high-voltage power supply battery into three phase currents for controlling the electric machine. Conversely, in another operating mode, the electric machine can also supply three alternating currents to the inverter so that said inverter transforms them into a direct current enabling the high-voltage supply battery to be charged.
    Figures 2 to 6 show five embodiments of the electric converter according to the invention. The converter 10-1, 10-2, 10-3, 10-4, 10-5 optionally includes a control unit UC.
    In these examples, the converter 10-1,10-2,10-3,10-4,10-5 is a resonance converter configured to convert a DC voltage into a DC voltage and comprises three resonant circuits. However, it could include a different number of resonant circuits.
    In particular, each resonant circuit includes a transformer, comprising at least one primary winding P1, P2, P3 and at least one secondary winding S1, S2, S3. Each resonant circuit further comprises a resonance capacity CR1, CR2, CR3 and a first inductive element L1, L2, L3. The primary winding P1, P2, P3, the resonance capacity CR1, CR2, CR3 and the first inductive element L1, L2, L3 are for example included in a branch of the resonant circuit, and are in particular in series. For example, the first inductive element L1, L2, L3 can be connected to a terminal of the resonance capacity CR1, CR2, CR3, the other terminal of the resonance capacity CR1, CR2, CR3 being connected to a terminal of l primary winding P1, P2, P3 of the transformer, optionally via a resistor (not shown).
    The first inductive elements L1, L2, L3, are preferably induction coils. The first inductive elements L1, L2, L3 of the three resonant circuits are coupled together (coupling TX1 in Figures 2 to 6). Likewise, the primary windings P1, P2, P3 of the three transformers of the resonant circuits are coupled together (coupling TX2 in FIGS. 2 to 6). Galvanic isolation is carried out between the primary windings P1, P2, P3 and the secondary windings S1, S2, S3 of the transformers of the three resonant circuits. A first mass M1 constitutes a reference potential of the converter 10-2, 10-3, 10-4, 10-5 on the primary side, and a second mass M2 constitutes a reference potential of the converter 10-2, 10-3, 10 -4, 10-5 secondary side.
    Each resonant circuit comprises a half-bridge output structure comprising a high transistor Q7, Q9, Q11 and a low transistor Q8, Q10, Q12, for example of the MOS type, connected at the level of a midpoint connected to the secondary winding S1, S2, S3 of the transformer of said resonant circuit.
    Advantageously, a second inductive element (not shown) can be added in parallel with the secondary winding S1, S2, S3 of the transformer of said resonant circuit or in parallel with the primary winding P1, P2, P3 of the transformer of said resonant circuit. This second inductive element is preferably an induction coil. This second inductive element makes it possible to produce, with the first inductive element L1, L2, L3 and the resonance capacity CR1, CR2, CR3, a resonant circuit of the LLC type. Note that, alternatively, the second inductive element can be the secondary winding S1, S2, S3 of the transformer of the resonant circuit when said secondary winding S1, S2, S3 has a magnetizing inductance, or the primary winding P1, P2 , P3 of the transformer of the resonant circuit when said primary winding P1, P2, P3 has a magnetizing inductance. Such a magnetizing inductor can be produced by an air gap in the core of the transformer.
    In the examples illustrated in Figures 2 to 6, the resonant circuits are such that the resonance branches which include the primary winding P1, P2, P3 are connected to a first point called "neutral >> PN1 and the branches which include the secondary windings S1, S2, S3 are connected to a second point called "neutral" PN2. The first neutral point PN1 and the second neutral point PN2 contribute to the balance of the circulating currents in the resonant circuits.
    In the example illustrated in FIG. 2, the neutral points PN1 and PN2 have a floating electrical potential, which makes it possible to limit the number of components of the continuous resonant converter. In the examples illustrated in FIGS. 3 to 6, the first neutral point PN1 and / or the second neutral point PN2 are not floating.
    Alternatively, the first neutral point PN1 is connected to the first mass M1 of the DC-DC converter via a first branch Bm called "resonance" comprising at least one impedance configured to store energy and allow a switching to zero of the switches of the DC-DC converter with resonance The first Bri branch connected to the first neutral point PN1 makes it possible to operate the converter 102, 10-3, 10-4, 10-5 in ZVS whatever the operating point of the converter 10-2, 10-3, 10-4,10-5, when the resonant continuous-continuous converter transfers energy from the primary to the secondary.
    Alternatively, the second neutral point PN2 is connected to the second mass M2 of the DC-DC converter via a second branch Br2 called "resonance" comprising at least one impedance configured to store energy and allow a Switching of resistor DC-DC converter switches to zero. The second branch Br2 connected to the second neutral point PN2 makes it possible to operate the converter 10-2, 10-3, 10-4, 10-5 in ZVS whatever the operating point of the converter 10-2, 10-3, 10-4, 10-5, when the DC-DC converter with resonance transfers energy from the secondary to the primary.
    In the examples illustrated in Figures 3 to 6, the first neutral point PN1 is connected to the first mass M1 via an inductor LB1 and a capacitor CB1 and the second neutral point PN2 is connected to the second mass M2 also via a inductance LB2 and a capacity CB2.
    In a first embodiment, illustrated in FIG. 2, and a second embodiment, illustrated in FIG. 3, each resonant circuit comprises a half-bridge input structure of transistors comprising a high transistor Q1, Q3, Q5 and a low transistor Q2, Q4, Q6, for example of the MOS type, connected at a midpoint, said midpoint being connected to the resonance branch of said resonant circuit, in particular at a point different from the first neutral point PN1. This configuration allows the circuits to operate with three input currents, in particular on three different phases. Such a configuration makes it possible to operate the converter on the six arms of the three half-bridges of the input structures of the three resonant circuits, in a three-phase manner, in particular in order to reduce the RMS current level, the size and the weight and the cost of electromagnetic compatibility filters. In particular, the transistors Q1-Q6 switch periodically so as to transmit energy through the DC-DC converter with resonance 10-2.
    In a third embodiment illustrated in Figure 4, only the first resonant circuit (the resonant circuit placed at the top in the figures) has a half-bridge input structure of transistors Q1, Q2, the midpoint of said input structure being connected to the resonance branch. The second resonant circuit (resonant circuit placed in the middle in the figures) and the third resonant circuit (resonant circuit placed at the bottom in the figures) are devoid of half-bridge input structure of transistors, their resonance branches being both connected to the first mass M1. Such a configuration makes it possible to operate the 10-3 converter on two switch arms in a single phase (voltage divider bridge). In particular, only the transistors Q1, Q2 of the first resonant circuit periodically switch so as to transmit energy through the DC-DC converter with resonance 10-3.
    In a fourth embodiment illustrated in Figure 5, the first resonant circuit and the second resonant circuit each have a half-bridge input structure of transistors Q1 / Q2 and Q3 / Q4. The midpoint of the input structure of the first resonant circuit is connected to the resonance branch of the first resonant circuit. The midpoint of the input structure of the second resonant circuit is connected to the resonance branch of the second resonant circuit The resonance branch of the third resonant circuit is connected to the first mass M1. Such a configuration makes it possible to operate the 10-3 converter on four switch arms, in a two-phase manner. In particular, only the transistors Q1, Q2, Q3, Q4 of the first and second resonant circuits switch periodically so as to transmit energy through the DC-DC converter with 10-4 resonance.
    In the fifth embodiment illustrated in Figure 6, the first resonant circuit and the third resonant circuit each have a half-bridge input structure of transistors Q1 / Q2 and Q5 / Q6. The midpoint of the input structure of the first resonant circuit is connected to the resonance branch of the first resonant circuit. The midpoint of the input structure of the third resonant circuit is connected to the resonance branch of the third resonant circuit. In the second resonant circuit, the resonance branch is in open circuit. One end VP2 of the resonance branch thus constitutes a floating potential point. Such a configuration makes it possible to operate the converter on four switch arms, in a two-phase manner. In particular, only the transistors Q1, Q2, Q5, Q6 of the first and third resonant circuits switch periodically so as to transmit energy through the DC-DC converter with resonance 10-5.
    The first to fifth embodiments are each advantageous over an operating range of the DC-DC converter with resonance.
    In a variant, the converter illustrated in FIG. 3 comprises a control unit UC which is configured to control the connection of the first inductive elements L1, L2, L3 of the resonant circuits according to different configurations corresponding here to the different embodiments described on Figures 4 to 6 in order to switch between different operating modes. In other words, the control unit UC makes it possible to obtain the configurations illustrated in FIGS. 4 to 6 from the circuit illustrated in FIG. 3. For example, the circuit illustrated in FIG. 4 can be obtained from that illustrated in FIG. 3 , keeping the low switches Q4, Q6 of the second and third resonance circuits closed and keeping the high switches Q3, Q5 of the second and third resonance circuits open. The switches Q1, Q2 of the first resonance circuit periodically switch so as to transmit energy through the DC-DC resonance converter. Thus, a larger operating range is obtained compared to an operation in which all the half-bridge input structures of transistors switch periodically to transfer energy through the resonant voltage-to-DC converter. It is also possible to use degraded modes. The converter illustrated in FIG. 2 can comprise a similar control unit UC making it possible to obtain the configurations of the input structure of FIGS. 4 to 6.
    In the examples illustrated in Figures 3 to 6, the switches Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12 are connected respectively in parallel with a capacity C1, C2 , C3, C4, C5, C6, C7, C8, C9, C10, C11, C12 to ensure operation in ZVS.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    1. Converter (10-1, 10-2, 10-3, 10-4, 10-5) of DC-DC voltage with resonance, in particular for electric or hybrid vehicle, said converter (10-1, 10-2. 10-3, 10-4, 10-5) comprising a plurality of resonant circuits, each resonant circuit comprising:
    - a first inductive element (L1, L2, L3),
    - a resonance capacity (CR1, CR2, CR3) connected to said first inductive element (L1, L2, L3),
    - a transformer comprising at least one primary winding (P1, P2, P3) and at least one secondary winding (S1, S2, S3), said first inductive element (L1, L2, L3), the resonance capacity (CR1, CR2 , CR3) and (primary winding (PI, P2, P3) of the transformer being included in a branch of the resonance circuit, called "resonance branch", converter (10-1, 10-2, 10-3, 10-4 , 10-5) in which on the one hand, the first inductive elements (L1, L2, L3) of the resonant circuits are coupled together, and in that, on the other hand, the primary windings (P1, P2, P3 ) transformers of the resonant circuits are coupled together.
    [2" id="c-fr-0002]
    2. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to claim 1, in which the transformer of each resonant circuit comprises a second inductive element in order to form a resonant circuit of the type LLC.
    [3" id="c-fr-0003]
    3. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to claim 1, wherein the secondary windings (S1, S2, S3) are coupled together.
    [4" id="c-fr-0004]
    4. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to any one of the preceding claims, in which the resonance branches are connected at the same point called " first neutral point "(PN1).
    [5" id="c-fr-0005]
    5. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to any one of the preceding claims, in which branches, each comprising one of said secondary windings (S1, S2, S3 ) transformers, are connected at the same point called "second neutral point" (PN2).
    [6" id="c-fr-0006]
    6. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to any one of claims 4 or 5, wherein the neutral point is connected to a mass of the DC-DC converter via a branch comprising at least one impedance configured to store energy and allow switching of the switches of the resonant DC-DC converter to zero.
    [7" id="c-fr-0007]
    7. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to the preceding claim, wherein said impedance comprises an inductor in series with a capacitance.
    [8" id="c-fr-0008]
    8. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to any one of claims 4 or
    5, in which the neutral point is configured so as to present a floating electrical potential.
    [9" id="c-fr-0009]
    9. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to any one of the preceding claims, in which at least one resonant circuit of the converter (10-1, 10- 2, 10-3, 10-4. 10-5) comprises a half-bridge input structure comprising a high switch and a low switch connected at a midpoint, said midpoint being connected to the resonance branch of said resonant circuit.
    [10" id="c-fr-0010]
    10. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to the preceding claim, in which each resonant circuit comprises a half-bridge input structure comprising a high switch ( Q1, Q2, Q3; and a low switch (Q2, Q4, Q6) connected at a midpoint, said midpoint being connected to the respective resonance branch of said resonant circuit.
    [11" id="c-fr-0011]
    11. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to any one of claims 9 or
    10, comprising n resonant circuits, n being a natural integer greater than or equal to two, © t in which a number p, p being a non-zero natural integer strictly less than n, said resonant circuits comprises an input structure in half bridge comprising a high switch and a low switch connected at a midpoint, said midpoint being connected to the respective resonance branch, said converter being configured so that in one operating mode:
    - said switches of the p resonant circuits periodically switch so as to transmit energy through the resonant circuits, the resonance branches of the np other resonant circuits being either in open circuit or either connected to a ground (M1) of the resonant DC-DC converter , for the duration of this operating mode.
    [12" id="c-fr-0012]
    12. Converter (10-1, 10-2, 10-3, 10-4, 10-5) according to the preceding claim, comprising a control unit (UC), said control unit being configured to control the switches of the np resonant circuits in order to put them either in open circuit during the duration of said operating mode or in connection with the ground (M1) of the resonant DC-DC converter during the duration of this operating mode.
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    同族专利:
    公开号 | 公开日
    CN110784111A|2020-02-11|
    US11196349B2|2021-12-07|
    FR3084797B1|2020-08-28|
    US20200044572A1|2020-02-06|
    EP3605818A1|2020-02-05|
    KR20200014215A|2020-02-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20140368175A1|2013-06-14|2014-12-18|Korea Electrotechnology Research Institute|High precision dc to dc converter with wide load range and gate drive circuit for use therein|
    CN106953526A|2016-01-07|2017-07-14|中兴通讯股份有限公司|A kind of direct current multiple input single output controlled resonant converter and its control method|
    CN106936320A|2017-05-11|2017-07-07|辽宁工程技术大学|A kind of crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter|
    CN103683964A|2013-12-20|2014-03-26|华为技术有限公司|Resonant bidirectional transducer, uninterruptible power supply device and control method|EP3320612A1|2016-07-07|2018-05-16|Huawei Technologies Co., Ltd.|Four-switch three phase dc-dc resonant converter|
    US20220006390A1|2020-07-02|2022-01-06|Delta Electronics, Inc.|Isolated multi-phase dc/dc converter with reduced quantity of blocking capacitors|
    法律状态:
    2019-07-19| PLFP| Fee payment|Year of fee payment: 2 |
    2020-02-07| PLSC| Publication of the preliminary search report|Effective date: 20200207 |
    2020-07-22| PLFP| Fee payment|Year of fee payment: 3 |
    2021-07-29| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1857151|2018-07-31|
    FR1857151A|FR3084797B1|2018-07-31|2018-07-31|CONTINUOUS-CONTINUOUS VOLTAGE CONVERTER TO RESONANCE|FR1857151A| FR3084797B1|2018-07-31|2018-07-31|CONTINUOUS-CONTINUOUS VOLTAGE CONVERTER TO RESONANCE|
    EP19186960.1A| EP3605818A1|2018-07-31|2019-07-18|Dc-dc resonant voltage converter|
    KR1020190090107A| KR20200014215A|2018-07-31|2019-07-25|Resonant dc-dc voltage converter|
    CN201910687069.9A| CN110784111A|2018-07-31|2019-07-29|Resonant DC-DC voltage converter|
    US16/526,104| US11196349B2|2018-07-31|2019-07-30|Resonant DC-DC voltage converter|
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