WO2025003090A1 - Procede de pilotage d'un convertisseur d'une premiere tension electrique en une deuxieme tension electrique - Google Patents
Procede de pilotage d'un convertisseur d'une premiere tension electrique en une deuxieme tension electrique Download PDFInfo
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- WO2025003090A1 WO2025003090A1 PCT/EP2024/067719 EP2024067719W WO2025003090A1 WO 2025003090 A1 WO2025003090 A1 WO 2025003090A1 EP 2024067719 W EP2024067719 W EP 2024067719W WO 2025003090 A1 WO2025003090 A1 WO 2025003090A1
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- frequency switching
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- converter
- electric
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4233—Arrangements for improving power factor of AC input using a bridge converter comprising active switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries for charging batteries from AC mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/0085—Partially controlled bridges
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Details of circuit arrangements for charging or discharging batteries or supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
- H02M7/68—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters
- H02M7/72—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
Definitions
- the invention relates to a method, implemented by a system for controlling a converter from a first electrical voltage to a second electrical voltage, for controlling the converter.
- the converter is connected to an alternating electrical voltage source.
- the first electrical voltage is thus an alternating electrical voltage (preferably sinusoidal) from a single-phase, two-phase or three-phase electrical supply network
- the second electrical voltage is a direct electrical voltage.
- the invention further relates to an assembly comprising a converter from a first electrical voltage to a second electrical voltage, and a system for controlling the converter configured to implement the steps of such a method.
- the invention also relates to an electric charger for an electric or hybrid vehicle, comprising such an assembly, as well as to an electric or hybrid vehicle, in particular an automobile, comprising such an electric charger.
- Known in the state of the art are electric chargers for electric or hybrid vehicles, embedded in such a vehicle and intended to be connected to a terminal or to an electric charging station, itself connected to a sinusoidal electric voltage source (such as a single-phase, two-phase or three-phase electric power supply network) for the electric power supply of the vehicle.
- a sinusoidal electric voltage source such as a single-phase, two-phase or three-phase electric power supply network
- Such an electric charger conventionally comprises a converter of a first alternating electric voltage into a second direct electric voltage, as well as a direct current to direct current converter configured to convert at high frequency the second direct electric voltage into a third direct electric voltage (this third direct electric voltage being used for example for an electric storage battery of the vehicle).
- the high-frequency direct current to direct current converter (typically a chopper) is connected to the output of the first converter.
- the converter of a first alternating electric voltage into a second direct electric voltage typically comprises an electromagnetic disturbance filtering stage and an active power factor correction stage connected to the output of
- the electromagnetic interference filtering stage is connected to the sinusoidal electrical voltage source, and makes it possible to filter harmonics generating electromagnetic interference.
- the active power factor correction stage comprises a low-frequency switching electronic branch and at least one high-frequency switching electronic branch.
- the low frequency corresponds in practice to the frequency of the voltage supplied by the single-phase, two-phase or three-phase electrical power supply network.
- the active power factor correction stage makes it possible to absorb a current as sinusoidal as possible on the electrical power supply network with a minimal phase shift (preferably zero) between the fundamental of the absorbed current and the mains voltage.
- the function of this stage is thus to draw a "quasi-sinusoidal" electric current using a current control loop (implemented in particular via the main inductance).
- the principle of sinusoidal drawing then consists of "forcing" the current flowing in the main inductance(s) to follow a sinusoidal reference (not rectified), by controlling the closing and opening of the power switches controlled in the electronic switching branches.
- the active power factor correction stage thus delivers to a capacitive load as well as to the vehicle's battery, and makes it possible to actively correct the current absorbed by this load and this battery (using the current control loop).
- the electromagnetic disturbance filtering stage is provided with a line connected on the one hand to this neutral conductor line and on the other hand to an intermediate terminal located in the middle of the low-frequency switching electronic branch of the active power factor correction stage.
- the active power factor correction stage implements a topology of the "mid-point cascode bidirectional synchronous rectifier" type, this low-frequency switching electronic branch makes it possible to process regular alternations in the input electrical voltage signal (both positive and negative alternations), as well as to allow rectification of the voltage.
- the low-frequency switching electronic branch may comprise controllable electronic switches (typically transistors), in which case the low-frequency switching electronic branch has a switching frequency substantially equal to that of the input electrical power supply network (for example 50 Hz).
- the low-frequency switching electronic branch may comprise diodes.
- the use of diodes allows an economic gain (due to the lower manufacturing cost of diodes compared to transistors).
- the disadvantage of using diodes is that the conduction losses in diodes are higher than the conduction losses in transistors, and diodes do not allow bidirectional power transfer (i.e. from the vehicle battery to the capacitive load, and vice versa), i.e. the electric current can only flow in one direction in the low-frequency switching electronic branch, for a given sign of the grid voltage.
- the high-frequency switching electronic branch ensures high-frequency switching of the input electric current, which which generates an input sinusoidal wave in phase with the voltage of the input power supply network, as well as high-frequency ripples intended to be filtered by the electromagnetic interference filtering stage.
- the shape of the switched current is regulated by a high-frequency pulse width modulation control which induces a ripple on the current, depending on the main inductance, the switching frequency and the value of the DC voltage in the output bus of the converter.
- the ripple on the current flowing in the low-frequency switching electronic branch can be higher than the average current, which, when this branch includes diodes, introduces a discontinuous conduction mode within the diodes.
- the diodes of the low-frequency switching electronic branch thus introduce a discontinuous conduction mode, which makes the digital control implemented in the converter control system more complex (additional computational load and increase in algorithmic complexity), and degrades the performance of the system as a whole.
- the discontinuous conduction mode of the diodes requires that the digital control implement functions for predicting the discontinuous conduction modes, correcting the measurement of the average current and correcting the high-frequency control command.
- the digital control in the discontinuous conduction mode of the diodes is based on prediction, and because the transition between the continuous and discontinuous conduction modes generates harmonic distortion, the final performance and efficiency are never as good as when the low-frequency switching electronic branch only comprises transistors, which themselves only operate in a continuous conduction mode.
- the aim of the invention is to overcome the drawbacks of the prior art by proposing a method, implemented by a system for controlling a converter from a first electrical voltage to a second electrical voltage, for controlling said rectifier, which makes it possible to implement reactive power control and bidirectional power transfer within the converter (charging and discharging modes), while offering in the charging mode flexibility in control, reasonable computational complexity and/or consumption of memory resources and by implementing a converter having reduced manufacturing costs.
- the invention thus relates, in its broadest sense, to a method, implemented by a system for controlling a converter from a first electrical voltage to a second electrical voltage, for controlling said converter, the converter being connected to an alternating electrical voltage source comprising a neutral conductive line and at least one phase conductive line, the alternating electrical voltage source providing the first electrical voltage, the converter comprising an active power factor correction stage, the active power factor correction stage comprising two low-frequency switching electronic branches connected in parallel, and at least one high-frequency switching electronic branch, each low-frequency switching electronic branch comprising two low-frequency switching half-branches connected in series at a first intermediate terminal, at least one switching half-branch of a first low-frequency switching branch comprising at least one switching member provided with a controllable electronic switch, at least one switching half-branch of a second low-frequency switching branch comprising at least one diode, each first intermediate terminal being connected to the conductive line neutral, said at least one high-frequency electronic switching branch comprising two high-frequency switching half-branche
- Imax is the maximum amplitude of the current intensity capable of flowing in the first low-frequency switching branch
- the method according to the invention makes it possible to eliminate the discontinuous conduction modes of the diodes likely to appear in the second low-frequency switching branch (it is then the first switching branch which is conductive), while benefiting from the advantages linked to this second switching branch (low cost in particular) outside the conduction zones. discontinuous. This optimizes the system performance, particularly in terms of harmonic distortion and power transfer efficiency (the power transfer being bidirectional).
- the activation conditions of the first low-frequency switching branch are based on theoretical predictions including safety margins, which guarantees that no overcurrent or discontinuous conduction mode can occur.
- the diodes are designed to support a maximum electrical power during the converter charging phase, while the controllable electronic switches (typically transistors) support a lower electrical power (particularly during the discharge phase), but allow, during the charging phase and for low electrical currents, to avoid the discontinuous conduction modes linked to the diodes.
- determining whether the mathematical relation (1) is verified or not makes it possible to know whether or not there exists at least one operating zone for which the electrical conduction mode of the diodes is a discontinuous conduction mode (if the mathematical relation (1) is not verified, then such an operating zone exists).
- the verification of the predefined criterion in the step of keeping the first low-frequency switching branch active or not consists in comparing the conduction losses in the diodes with the conduction losses in the controllable electronic switches, the first low-frequency switching branch being kept active if the conduction losses in the diodes are greater than the conduction losses in the controllable electronic switches, the first low-frequency switching branch being deactivated otherwise. This makes it possible to optimize the efficiency of the converter, in particular from the point of view of conduction losses.
- the invention also relates to an assembly comprising a converter of a first electrical voltage into a second voltage. and a system for controlling said converter, the converter being able to be connected to an alternating electrical voltage source comprising a neutral conductive line and at least one phase conductive line, the converter comprising an active power factor correction stage, the active power factor correction stage comprising two low-frequency switching electronic branches connected in parallel, and at least one high-frequency switching electronic branch, each low-frequency switching electronic branch comprising two low-frequency switching half-branches connected in series at a first intermediate terminal, at least one switching half-branch of a first low-frequency switching branch comprising at least one switching member provided with a controllable electronic switch, at least one switching half-branch of a second low-frequency switching branch comprising at least one diode, each first intermediate terminal being able to be connected to the neutral conductive line, said at least one high-frequency switching electronic branch comprising two high-frequency switching half-branches connected in series at a second intermediate terminal, at least one high-frequency switching half
- each of the diodes being configured to authorize in its on state a maximum current value for passage through the diode greater than the maximum current value authorized by each controllable electronic switch in its on state, and greater than the critical conduction current value of the diode
- the control system comprising means for measuring the first and second electrical voltages and means for determining, from the first and second electrical voltages measured, the peak-to-peak amplitude Id of the intensity of the current capable of flowing in the first low-frequency switching branch, the control system of the converter being configured to implement the steps of a control method as described above, the control system being configured to apply, during the load phase of the process, an instantaneous current setpoint l sp to the current flowing in the or each inductance.
- the invention also relates to an electric charger for an electric or hybrid vehicle intended to be connected to a terminal or to an electric charging station connected to an alternating electric voltage source, for the electrical supply of said electric or hybrid vehicle, the electric charger comprising an assembly as described above.
- the invention also relates to an electric or hybrid vehicle, in particular an automobile, comprising an electric charger as described above.
- FIG.1 is a schematic representation of an assembly comprising a converter of a first electrical voltage into a second electrical voltage and a system for controlling the converter, the control system being configured to implement the steps of a control method according to the present invention
- FIG.2 is a flowchart representing a control method according to an embodiment of the present invention, implemented by the control system of FIG. 1.
- an assembly 2 comprising a converter 4 of a first electrical voltage LU into a second electrical voltage U2, and a system 6 for controlling the converter 4, according to an embodiment of the invention.
- the converter 4 is connected on the one hand to an alternating electrical voltage source (such as for example a single-phase, two-phase or three-phase electrical power supply network - such a source not being shown in the figure for reasons of clarity) providing the first electrical voltage LU, and on the other hand to a load 3 delivering between its terminals the second electrical voltage U2.
- an alternating electrical voltage source such as for example a single-phase, two-phase or three-phase electrical power supply network - such a source not being shown in the figure for reasons of clarity
- the alternating electrical voltage source (preferably sinusoidal) conventionally comprises a neutral conductive line N1 and at least one phase conductive line (in this case a single phase conductive line P1 in the embodiment of particular embodiment illustrated in figure 1 for which the electrical supply network is a single-phase network).
- the assembly 2 is typically installed within an electric or hybrid motor vehicle, more precisely within an electric charger intended to be connected to an electric charging station or terminal, itself connected to the source of alternating electric voltage, for the power supply of the vehicle (neither the vehicle, nor the charging station or terminal, nor the charger as a whole being shown in the figure for reasons of clarity).
- the first electric voltage LU is an alternating electric voltage from the single-phase electric power supply network
- the second electric voltage U2 is a direct electric voltage making it possible to power an electric storage battery of the vehicle, after transformation by one or more other stages of the electric charger (such as for example a step-down chopper).
- the converter 4 thus supplies the second DC electrical voltage U2 on an output bus 5 to which the load 3 is connected (here for example a bank of capacitors), the value of this second DC electrical voltage U2 being for example of the order of 400 Vdc or 800 Vdc.
- the second electrical voltage U2 is thus stabilized by the bank of capacitors 3.
- the converter 4 conventionally comprises an electromagnetic interference filtering stage (not shown in FIG. 1 for reasons of clarity) and an active power factor correction stage 7 connected to the output of the electromagnetic interference filtering stage via at least one main inductance 8.
- the active power factor correction stage 7 is connected to the output of the electromagnetic interference filtering stage via two main inductances 8, which for example each have the same inductance value.
- the active power factor correction stage 7 comprises two low-frequency switching electronic branches 16A, 16B connected in parallel, and at least one high-frequency switching electronic branch 18A, 18B.
- the active power factor correction stage 7 is a bidirectional synchronous rectifier with a mid-point cascode assembly and comprises two high-frequency switching electronic branches 18A, 18B connected in parallel.
- the number of high-frequency switching electronic branches 18A, 18B is thus equal to the number of main inductances 8.
- the active power factor correction stage 7 could comprise a single high-frequency switching electronic branch 18A, 18B.
- Each high-frequency switching electronic branch 18A, 18B provides high-frequency switching of the input electric current, which makes it possible to generate an input sinusoidal wave in phase with the voltage of the input power supply network, as well as high-frequency ripples intended to be filtered by the electromagnetic disturbance filtering stage.
- Each low-frequency switching electronic branch 16A, 16B comprises two low-frequency switching half-branches 16A1, 16A2, respectively 16B1, 16B2, connected in series at an intermediate terminal 20A, 20B. Each intermediate terminal 20A, 20B is connected to the neutral conductor line N1.
- Each half-branch 16A1, 16A2 of a first low-frequency switching branch 16A comprises a switching member 24.
- the first low-frequency switching electronic branch 16A has a switching frequency substantially equal to that of the input power supply network (for example 50 Hz).
- Each half-branch 16B1, 16B2 of a second low-frequency switching branch 16B comprises a diode 30.
- Each high-frequency switching electronic branch 18A, 18B comprises two high-frequency switching half-branches 18A1, 18A2, respectively 18B1, 18B2 connected in series at an intermediate terminal 22A, 22B.
- Each intermediate terminal 22A, 22B is connected to one of the main inductors 8 (each main inductor 8 being connected to the phase conductive line P1 via the electromagnetic interference filtering stage).
- Each high-frequency switching half-branch 18A1, 18A2, 18B1, 18B2 comprises a switching member 25.
- each half-branch 16A1, 16A2, 16B, 18A1, 18A2, 18B1, 18B2 comprises a number N2 of switching members 24, 25, N2 being an integer greater than or equal to two.
- each switching member 24, 25 is bidirectional in current and unidirectional in voltage.
- Each switching member 24, 25 comprises a controllable electronic switch 26 and a diode 28 (which is a so-called “parasitic” diode) connected in antiparallel, thus ensuring bidirectional current flow paths.
- Each switch 26 is for example formed from an insulated gate bipolar transistor, also called an IGBT transistor (from the English “Insulated Gate Bipolar Transistor”). All the IGBT transistors 26 are, for example, identical.
- the gate of each IGBT transistor 26 is connected to the aforementioned control means to receive a corresponding control signal.
- the IGBT transistor 26 is replaced by any semiconductor electronic component comprising a control electrode and two conduction electrodes, such as a bipolar transistor, a field effect transistor, a thyristor, a gate-turn-off thyristor, an IGCT thyristor (from the English "Insulated Gate Commutated Thysistor”), or an MCT thyristor (from the English “MOS Controlled Thyristor”) for example.
- the controllable electronic switches 26 of the switching members 24 of the first low-frequency switching electronic branch 16A are different from the controllable electronic switches 26 of the switching members 25 of the high-frequency switching electronic branches 18A, 18B.
- the control system 6 of the converter 4 is configured to control the switching of the switching members 24, 25 (at a different switching frequency depending on whether they are the switching members 24 of the first low-frequency switching electronic branch 16A or the switching members 25 of the high-frequency switching electronic branches 18A, 18B).
- the control system 6 is configured to control two control loops at the level of the high-frequency switching electronic branches 18A, 18B and the main inductors 8: a first control loop where the electric current is controlled via a current setpoint (the current setpoint being able to be phase-shifted relative to the voltage of the input electrical power supply network if reactive power is to be generated), and a second control loop where the electric voltage is controlled via a voltage setpoint.
- control system 6 is configured to apply an instantaneous current setpoint l sp to the current flowing in each inductance 8, during a charging phase of the converter 4 (during which the electric current flows in a first direction in the first low-frequency switching branch 16A or in the second low-frequency switching branch 16B, and the power transfer is carried out from the input power supply network to the capacitive load 3).
- the converter 4 can also operate in a discharging phase during which the electric current flows in a second direction, opposite to the first direction of circulation, in the first low-frequency switching branch 16A, and the power transfer is carried out from the capacitive load 3 to the input power supply network or to an external load connected to the vehicle.
- control system 6 comprises means 31 for measuring the first and second electrical voltages LU, U2 and means 32 for determining, from the measured first and second electrical voltages LU, U2, the peak-to-peak amplitude l ci of the intensity of the current specific to flow in the first low-frequency switching branch 16A.
- the expression of the peak-to-peak amplitude l ci of the intensity of the current specific to flow in the first low-frequency switching branch 16A is given by the following relation (2):
- L is the minimum inductance value of each main inductor 8 (taking into account the inductance variation linked to component dispersions and operating conditions);
- F s is the switching frequency of each high-frequency switching branch 18A, 18B.
- the control system 6 also comprises means (not shown in the figures) for measuring, over a switching period of each high-frequency switching branch 18A, 18B, the average current flowing through each main inductance 8.
- the peak-to-peak amplitude l ci of the intensity of the current capable of flowing in the first low-frequency switching branch 16A then corresponds to the current variation passing through each main inductance 8 during the switching period of each high-frequency switching branch 18A, 18B.
- Each diode 30 is chosen so as to allow in its on state a maximum current value for passage through the diode 30 greater than the maximum current value for passage authorized by each controllable electronic switch 26 of the first low-frequency switching electronic branch 16A (in its on state), and greater than the critical conduction current value of the diode 30.
- each diode 30 is chosen such that there is at least one operating zone for which, when the electric current passes through the diode 30, the electric conduction mode is a continuous conduction mode.
- Each diode 30 is sized so as to support the maximum electric power in the charging phase of the converter 4.
- the controllable electronic switch 26 of each switching member 24 of the first low-frequency switching electronic branch 16A is sized so that the maximum current value for passage authorized by the controllable electronic switch 26 covers the discontinuous conduction zones of the diodes 30.
- the method for controlling the converter 4, implemented by the control system 6, will now be described with reference to FIG. 2. Initially, the method is in the charging phase of the converter 4.
- the first low-frequency switching branch 16A is activated by the control system 6 at the start of the charging phase (in other words, at any time during this activation phase, only one of the two switching members 24 of the first branch 16A is in a closed state; the one of the two switching members 24 which is in the closed state being a function of the sign of the voltage LU of the power supply network).
- the instantaneous current setpoint l sp (sinusoidal) intended to be applied to the current flowing in each inductance 8 is calculated by the control system 6.
- the control system 6 calculates, from the measurement of the average current flowing through each main inductance 8 over a switching period of each high-frequency switching branch 18A, 18B, the control signals to be applied to the switching members 25 of the high-frequency switching branches 18A, 18B, to enable monitoring of the instantaneous setpoint l sp .
- the method comprises an initial step 39 of measuring, by the measuring means 31 of the control system 6, the first and second electrical voltages U1, U2.
- the method comprises a following step 40 during which the control system 6 determines (via its means 32), from the first and second measured electrical voltages LU, U2, the peak-to-peak amplitude l ci of the intensity of the current flowing in the first low-frequency switching branch 16A.
- the peak-to-peak amplitude Id is determined using the mathematical relationship (2) previously described.
- the method comprises a following step 42 during which the control system 6 compares the peak-to-peak amplitude l ci with a predefined threshold current value l seU ii .
- the value uii is such that:
- Imax is the maximum amplitude of the current intensity capable of flowing in the first low-frequency switching branch 16A.
- the method comprises a following step 44 during which the control system 6 deactivates the first low-frequency switching branch 16A (in other words, at any time during this deactivation phase, the two switching members 24 of the first branch 16A are at the same time in their open state).
- the electric current which flows in the converter 4 in the first direction of circulation (charging phase), then flows in the second low-frequency switching branch 16B provided with the diodes 30.
- the method loops back to the initial measurement step 39.
- the method comprises a following step 46 during which the control system 6 determines whether the following mathematical relationship (1) is verified: sgn(u) provides the sign of the function u(t) and is therefore equal to -1 or 1 when u(t) is non-zero. [033] Determining whether the mathematical relationship (1) is verified or not makes it possible to know whether or not there exists at least one operating zone for which the electrical conduction mode of the diodes 30 is a discontinuous conduction mode (if the mathematical relationship (1) is not verified, then such an operating zone exists).
- the method comprises a following step 48 during which the control system 6 keeps the first low-frequency switching branch 16A active. The method then loops back to the initial measurement step 39.
- the method comprises a following step 50 during which the control system 6 determines whether a predefined criterion is verified, and maintains active or on the contrary deactivates the first low-frequency switching branch 16A depending on the verification of the criterion.
- the verification of the predefined criterion consists in comparing on the one hand the conduction losses in the diodes 30 of the second low-frequency switching branch 16B, with the conduction losses in the controllable electronic switches 26 of the first low-frequency switching branch 16A on the other hand.
- the control system 6 keeps the first low-frequency switching branch 16A active (during a sub-step 50A) if the conduction losses in the diodes 30 are greater than the conduction losses in the controllable electronic switches 26.
- the control system 6 deactivates the first low-frequency switching branch 16A (during a sub-step 50B) otherwise.
- the method loops back to the initial measurement step 39.
- the method for controlling a converter according to the invention makes it possible to implement reactive power control and bidirectional power transfer within the converter (charging and discharging modes), while by providing in the charging mode flexibility in control, reasonable computational complexity and/or memory resource consumption and by implementing a converter with reduced manufacturing costs.
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Abstract
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020257039251A KR20260005334A (ko) | 2023-06-28 | 2024-06-25 | 제1 전압을 제2 전압으로 변환하기 위한 컨버터를 제어하기 위한 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2306764A FR3150665B1 (fr) | 2023-06-28 | 2023-06-28 | Procede de pilotage d’un convertisseur d’une premiere tension electrique en une deuxieme tension electrique |
| FRFR2306764 | 2023-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2025003090A1 true WO2025003090A1 (fr) | 2025-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/067719 Ceased WO2025003090A1 (fr) | 2023-06-28 | 2024-06-25 | Procede de pilotage d'un convertisseur d'une premiere tension electrique en une deuxieme tension electrique |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20260005334A (fr) |
| FR (1) | FR3150665B1 (fr) |
| WO (1) | WO2025003090A1 (fr) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130257390A1 (en) * | 2012-03-29 | 2013-10-03 | Delta Electronics, Inc | Power factor correction circuit |
| US20140226375A1 (en) * | 2013-02-13 | 2014-08-14 | Power-One, Inc. | Power converter with non-symmetrical totem pole rectifier and current-shaping branch circuits |
-
2023
- 2023-06-28 FR FR2306764A patent/FR3150665B1/fr active Active
-
2024
- 2024-06-25 WO PCT/EP2024/067719 patent/WO2025003090A1/fr not_active Ceased
- 2024-06-25 KR KR1020257039251A patent/KR20260005334A/ko active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130257390A1 (en) * | 2012-03-29 | 2013-10-03 | Delta Electronics, Inc | Power factor correction circuit |
| US20140226375A1 (en) * | 2013-02-13 | 2014-08-14 | Power-One, Inc. | Power converter with non-symmetrical totem pole rectifier and current-shaping branch circuits |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3150665A1 (fr) | 2025-01-03 |
| KR20260005334A (ko) | 2026-01-09 |
| FR3150665B1 (fr) | 2025-05-16 |
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