Method for controlling a rectifier, related control device, charger and vehicle

Abstract

The present invention relates to a method for controlling a rectifier (11) connected to each phase (9) of an AC source (8) to form a charging circuit and configured to consume current for each phase according to a setting signal provided by a controller (32), the method comprising a parameterization step (40) for each phase including: • calculating (42) the inductance of the charging circuit from: • the nominal model of the inductance; • the current consumed by the rectifier (11); • the setting signal; and • the transfer function of the controller (32); • updating (44) the coefficients of the transfer function of the controller (32) according to the determined inductance; and for each phase (9), the inductance includes the inductance of the coil (24) of the corresponding boost converter (28) of the rectifier (11) and / or the line inductance of the phase (9).

Description

Technical Field

[0001] This invention relates to a method for controlling a rectifier.

[0002] The present invention also relates to a control device, a charger including the control device, and a vehicle including the charger.

[0003] This invention applies to the field of electric vehicles, and more specifically to chargers for such vehicles. Background Technology

[0004] It is known that electric vehicles are equipped with chargers. Such chargers are designed to be connected to the AC power grid, such as a three-phase AC grid, to charge the vehicle's high-voltage battery (typically 400 V).

[0005] Typically, such chargers include a rectifier associated with a control unit configured to control the operation of the rectifier based on a target current to be achieved.

[0006] Specifically, the control device includes a current controller configured to generate a voltage setpoint from a target current, and a synthesizer of the control device is configured to synthesize a pulse width modulation signal based on the voltage setpoint to control the on or off state of the switching components of the rectifier.

[0007] Generally, in the case of a rectifier, the target current is a sinusoidal current.

[0008] However, such control devices are not entirely satisfactory.

[0009] In fact, in order to ensure the optimal voltage setting value according to the target current, the parameters of the controller are preset for the predetermined characteristics of the AC power grid.

[0010] However, significant variability in characteristics can be observed when moving from one AC power grid to another, especially in the value of line inductance. In reality, the value of line inductance depends on parameters that are largely beyond the influence of vehicle users, such as distance from the grid transformer and cable quality.

[0011] Therefore, when the charger is connected to a power grid with characteristics different from the aforementioned predetermined characteristics, the performance, especially the stability, of the controller during its operation (i.e., when it is connected to the AC power grid) may be adversely affected, particularly causing an undesirable deviation between the actual current supplied by the charger and the desired current.

[0012] One object of the present invention is to overcome at least one disadvantage of the prior art.

[0013] Another object of the present invention is to provide a method for controlling a rectifier that is less affected by the variability of electrical characteristics between different AC power grids to which it may be connected. Summary of the Invention

[0014] Therefore, the present invention relates to a method of the type described above, wherein a rectifier, in use, is connected at its input to each phase of an AC source to form a charging circuit and is configured to consume current for each phase according to a setting signal provided by a controller, the control method comprising implementing a parameterization step, which for each phase of the source includes the following sub-steps: - Calculate the corresponding inductance of the charging circuit from the following: The predetermined nominal inductor model; The rectifier consumes current; A setting signal provided by the controller, characterizing the target current to be consumed by the rectifier; and The transfer function of the controller; - Update the coefficients of the controller's transfer function based on the determined inductance; and For each phase of the source, the inductance of the charging circuit includes at least one of the following: the inductance of the coil of the corresponding boost converter of the rectifier and the line inductance of the phase of the source.

[0015] In practice, this type of method determines the inductance of each charging circuit and adjusts the controller's transfer function accordingly. In other words, this operation takes into account the variability of electrical characteristics between different power grids.

[0016] This has a beneficial effect on the performance, especially the stability, of the controller during the operation of the rectifier.

[0017] Advantageously, the control method according to the invention has one or more of the following features, individually or in any technically feasible combination: for each phase of the source, the inductance of the charging circuit is equal to the product of the nominal model and a constant, and the calculation of the inductance of the charging circuit includes an estimate of the constant; For each phase of the source, the constant is estimated according to the following relationship: [Mathematical Expression 1] in: K is the constant mentioned above; T e The sampling period; p represents any time point in the computation; p 1 represents the calculation time prior to time p; I m (p) represents the current consumed by the rectifier at time p; and U'(p) is the value of the normalized setting signal provided by the controller at calculation time p, and the normalized setting signal is equal to the result obtained by dividing the setting signal by the nominal model; For each phase, the updated transfer function is equal to the product of the following: first, the nominal transfer function determined by the nominal model of the coil of the corresponding boost converter; and second, the estimated constant. For each phase of the source, the calculation of the inductance of the charging circuit also depends on the predetermined internal resistance of the coil of the corresponding boost converter of the rectifier; Prior to the update, the method further includes: - For the first implementation of the calculation sub-step, for each boost converter of the rectifier, the inductance of the corresponding coil is determined, wherein the source to which the rectifier is connected is a grid simulator configured to simulate an AC grid with zero line inductance for each phase. - A second implementation of the calculation sub-step following the first implementation of the calculation sub-step, wherein the source to which the rectifier is connected is an AC power grid, and for each phase of the AC power grid, the corresponding line inductance is equal to the determined charging circuit inductance minus the inductance of the coil of the boost converter connected to the rectifier of that phase; For each phase, the controller has a transfer function, the numerator and denominator of which are both first-order polynomials.

[0018] According to another aspect of the invention, a control device for controlling a rectifier is provided, the rectifier being used to connect its input terminals to each phase of an AC source to form a charging circuit, and being configured to consume current for each phase according to a setting signal provided by a controller. The control device includes a processing unit configured to perform a parameterization step, the parameterization step for each phase of the source comprising the following sub-steps: - Calculate the inductance of the corresponding charging circuit based on the following: The predetermined nominal inductor model; The rectifier consumes current; A setting signal provided by the controller and characterizing the target current to be consumed by the rectifier; and The transfer function of the controller; - Update the coefficients of the controller's transfer function based on the determined inductance; and For each phase of the source, the inductance of the charging circuit includes at least one of the following: the inductance of the coil of the corresponding boost converter of the rectifier and the line inductance of the phase of the source.

[0019] The apparatus according to the invention can be any type of device, such as a server, computer, tablet computer, calculator, processor, or computer chip, programmed to implement the method according to the invention, for example by executing a computer program according to the invention.

[0020] According to another aspect of the invention, a charger is provided, which includes a rectifier and a control device as defined above for controlling the operation of the rectifier.

[0021] According to another aspect of the invention, an electric vehicle is proposed, which includes a charger as defined above, the charger being connected at its output terminal to the battery of the electric vehicle. Attached Figure Description

[0022] To better understand the invention, the following description, which is given by way of non-limiting example only, will be read with reference to the accompanying drawings, wherein: [Figure 1]: Figure 1 This is a schematic representation of an electric vehicle according to the present invention; [Figure 2]: Figure 2 for Figure 1 The diagram shows the charger of the vehicle in use. [Figure 3]: Figure 3 for Figure 2 A schematic representation of the control device of the charger shown; and [Figure 4]: Figure 4 for Figure 3 A flowchart of the control method implemented by the control device shown.

[0023] It should be understood that the embodiments described below are not intended to be limiting. For example, variations of the invention may be envisioned that include only a selection of the features described below, independent of the other features, if such selection is sufficient to provide a technical advantage or to distinguish the invention from the prior art. The selection may include at least one feature of functional preference and contain no structural details, or only partial structural details, if such partial details are sufficient to provide a technical advantage or to distinguish the invention from the prior art.

[0024] In particular, if there are no technical objections to this combination, all the described variations and all implementations can be combined with each other.

[0025] In the accompanying drawings and the following description, elements common to multiple drawings retain the same reference numerals. Detailed Implementation

[0026] like Figure 1 As shown, the electric vehicle 2 according to the present invention.

[0027] The electric vehicle 2 includes a battery 4 and a charger 6, with the battery 4 connected to the output terminal of the charger 6.

[0028] Battery 4 is specifically used to power the electric motor of electric vehicle 2. In addition, charger 6 is adapted to transfer electrical energy from AC source 8 to battery 4 to charge battery 4.

[0029] Electric vehicle 2 may or may not include a heat engine. When an electric vehicle also includes a heat engine for its motion, electric vehicle 2 is also called a "hybrid vehicle".

[0030] Source 8 is particularly relevant to three-phase or single-phase power grids. In this case, each phase 9 of source 8 is inherently inductive, referred to as "line inductance". In the diagram, the corresponding line inductance for each phase 9 of source 8 is represented by coil 10.

[0031] According to another example (described later), Source 8 is a power grid simulator configured to simulate any type of power grid, especially an AC power grid with zero line inductance for each phase.

[0032] The charger 6 includes a rectifier 11 and a control device 12 configured to drive the rectifier 11 to operate.

[0033] Figure 2 An example of the architecture of rectifier 11, called a "six-pulse bridge", is shown, which is designed to connect to a three-phase power grid.

[0034] Typically, such a rectifier 11 includes three switching branches 14 connected in parallel between a first DC bus 16 and a second DC bus 18. Each switching branch 14 includes two switching elements 20 connected in series between the first DC bus 16 and the second DC bus 18, and connected to each other at the midpoint 22.

[0035] In addition, for each switch branch 14, the rectifier 11 includes a coil 24 connected between its respective midpoint 22 and its respective input terminal 26.

[0036] A boost converter 28 is formed by a circuit consisting of each switch branch 14 and a coil 24 connected to that switch branch 14. In this case, for each boost converter 28, the current loop is implemented through one of two other boost converters 28 located between the first DC bus 16 and the second DC bus 18, or through a neutral line connection provided between the first DC bus 16 and the second DC bus 18. As shown, the three boost converters 28 are staggered.

[0037] The first DC bus 16 and the second DC bus 18 are electrically connected to the corresponding terminals of the battery 4, for example, through an isolated DC-DC converter (not shown) that provides the charger 6.

[0038] Furthermore, as shown in the figure, in use, each input terminal 26 is connected to the corresponding phase 9 of the source 8. In other words, in use, each boost converter 28 is connected to the corresponding phase 9 of the source 8. Thus, the source 8 and the rectifier 11 constitute a charging circuit.

[0039] Furthermore, for each phase 9, the vehicle 2 includes a corresponding current sensor 30, which is configured to provide the control unit 12 with a current I characterizing the current flowing between the phase 9 and the rectifier 11 (i.e., between the corresponding boost converter 28 of the phase 9 and the rectifier 11). m The measurement signal. In other words, for each phase 9, the measurement signal provided by the corresponding current sensor 30 characterizes the current drawn from said phase 9 by the rectifier 11 (in particular the boost converter 28 connected to that phase 9).

[0040] Of course, rectifier 11 can present any other known architecture, such as the so-called "twelve-pulse bridge" architecture, a three-level rectifier (e.g., presenting the so-called "Vienna rectifier" architecture), or any N-level rectifier (N being a positive integer). In this case, the elements of rectifier 11 are arranged to form a boost converter (each containing a coil) for each phase 9 of the source 8 to which charger 6 is intended to be connected.

[0041] As mentioned above, Figure 3 The control device 12 shown is configured to drive the operation of the rectifier 11. More specifically, the control device 12 is configured to operate based on the target current I drawn from the power grid 8 (especially from the corresponding phase 9) by each boost converter 28 of the rectifier 11. c To drive the operation of rectifier 11. This type of target current I c The current consumed depends on operating conditions, for example.

[0042] As shown in the figure, the control device 12 includes a controller 32, a modulator (PWM generator) 34, and a processing unit 36.

[0043] Controller 32 is configured to, for each phase 9, draw from the corresponding target current I c Generate setting signal U L The modulator 34 is configured to operate according to the setting signal U provided by the controller 32. L Control signals are generated to drive the rectifier 11. Furthermore, the processing unit 36 ​​is configured to parameterize the controller 32.

[0044] Controller 32 More specifically, for each phase 9, the controller 32 is configured to adjust the target current I associated with it. c and the current I measured by the corresponding current sensor 30 m Generate the corresponding setting signal U L (The voltage across coil 24 associated with rectifier 11 is dimensionless). Therefore, the setting signal U... L The target current I to be consumed by each boost converter of rectifier 11 c More specifically, if we consider the setting signal U... L Characterizing the voltage across coil 24, in the frequency domain, U L = L.Ic, where L is the inductance of the coil. More specifically, the controller 32 is configured to base on a value equal to the target current Ic. c With the measured current I m The difference in error is used to generate the set signal U. L .

[0045] The controller 32 is particularly characterized by its transfer function, which includes a set of coefficients.

[0046] Specifically, controller 32 is a linear controller, meaning that for each phase 9, the corresponding transfer function can be expressed as the ratio of two polynomials.

[0047] Advantageously, for each phase 9, the controller 32 has a transfer function, the numerator and denominator of which are both first-order polynomials. This characteristic is advantageous because the stability of such a controller is rarely, if ever, affected by changes in line inductance.

[0048] Modulator 34 Modulator 34 is configured to generate a control signal for driving rectifier 11. More specifically, modulator 34 is configured to generate a setpoint signal U provided by controller 32. L To generate control signals.

[0049] It is well known to those skilled in the art that the modulator 34 generates control signals. For example, the modulator 34 is configured to use pulse width modulation (PWM) to generate the control signals. In this case, the control signals are defined over multiple consecutive switching intervals, and for each switching interval, control is included in the off or on state of each switching element 20 during that switching interval. Typically, the duration of each switching interval is negligible relative to the period of the source 8, for example, 14.28 µs (microseconds), corresponding to a control frequency of 70 kHz.

[0050] Processing unit 36 As previously described, processing unit 36 ​​is configured to parameterize controller 32. Specifically, processing unit 36 ​​is configured to perform at least one parameterization step 40, see [link to previous section]. Figure 3 and Figure 4 Describe it.

[0051] The parameterization step 40 includes an inductance calculation sub-step 42 (or “calculation sub-step”) and an update sub-step 44.

[0052] Calculate sub-step 42 For each phase 9, processing unit 36 ​​is configured to calculate the inductance of the charging circuit during calculation sub-step 42. For each phase 9, such inductance includes at least the line inductance of phase 9 and the inductance of the coil 24 of the corresponding boost converter 28. For example, for each phase 9, the inductance of the corresponding charging circuit is equal to the sum of the line inductance of phase 9 and the inductance of the coil 24 of the corresponding boost converter 28.

[0053] For each phase 9, the processing unit 36 ​​is configured to calculate the inductance of the corresponding charging circuit from the following: - The predetermined nominal inductor model L; - Current I consumed by rectifier 11 m ; - The setting signal U provided by controller 32 L ;as well as - Transfer function of controller 32.

[0054] Using the nominal model L is advantageous, especially when the determined inductance is that of coil 24. In practice, coil 24 typically exhibits characteristics consistent with the nominal model (i.e., inductance changing with current), but differs by a multiplication constant K. Using this model allows the current I to... m With setting signal U L The relationship between them is linearized, making it easier to estimate the inductance.

[0055] The nominal model is obtained, in particular, by approximating the nominal characteristics provided by the manufacturer of coil 24 with a predetermined function. For example, the predetermined function is an affine function, so that the nominal model can be written as: L(I) = aI + b, where a and b are real numbers determined during the approximation process.

[0056] Advantageously, to obtain the inductance of the charging circuit, the processing unit 36 ​​is configured to first calculate the normalized setting signal U', which is equal to the normalized setting signal U'. L The result obtained by dividing by the nominal model L. More specifically, at a given calculation time p, the normalized setpoint signal U' is equal to the setpoint signal U at that calculation time. L Divide by the target current I at that calculation time. c For equal currents, the result obtained by taking the value L0 of the nominal model L is: [Mathematical Expression 2] Preferably, the processing unit 36 ​​is further configured to solve for the current I m The linear equations associated with the normalized setpoint signal and the transfer function of the controller 32 are used to estimate the constant K for each phase 9 of the source.

[0057] In this case, the processing unit 36 ​​is preferably configured to solve such linear equations by implementing a linear parameter estimator, particularly based on the following relationship (derived from the zero-order hold applied to the output of the controller 32): [Mathematical Expression 3] in: -p represents any given computation time; -p 1 represents the calculation time prior to calculation time p; and -T e This refers to the period between two consecutive calls of the current control loop.

[0058] According to another example, processing unit 36 ​​is configured to estimate the constant K for each phase 9 of the source according to the following relationship: [Mathematical Expression 4] For example, the processing unit 36 ​​is configured to estimate the value of the constant K for multiple different calculation times and determine the constant K as the average value of the estimated values.

[0059] Advantageously, and as Figure 3 As shown, for each phase of source 8, processing unit 36 ​​is configured to operate according to a predetermined internal resistance R of the coil 24 of the corresponding boost converter. iThis is used to calculate the inductance of the charging circuit. This characteristic is advantageous because it leads to a more accurate estimate of the constant K. In this case, in the relationship used to estimate the constant K, only (U' R i I c One item replaces one item U'.

[0060] Furthermore, for each phase 9, the processing unit 36 ​​is configured to determine the calculated inductance of the corresponding charging circuit as the product of the nominal model L and the value of the estimated constant K.

[0061] In this case, for each phase 9, the charging circuit inductance K*L calculated by the processing unit 36 ​​is equal to the sum of the line inductance of phase 9 and the inductance of the coil 24 of the corresponding boost converter 28.

[0062] Update sub-step 44 Furthermore, for each phase 9, the processing unit 36 ​​is configured to update the transfer function of the controller 32 (in particular, update the coefficients of the transfer function) according to the determined inductance during the update sub-step 44.

[0063] For example, the processing unit 36 ​​is configured to calculate the updated transfer function as the result of the product of the following: first, the nominal transfer function determined for the nominal model L of coil 24, and second, the determined constant K.

[0064] This method is particularly suitable for the case where the controller 32 has a transfer function and both its numerator and denominator are first-order polynomials.

[0065] As a variant, processing unit 36 ​​is configured to perform the first implementation of calculation sub-step 42 when rectifier 11 is connected to a power grid simulator (forming source 8 and configured to simulate an AC power grid with zero line inductance for each phase). In this case, processing unit 36 ​​is able to determine the inductance of the corresponding coil 24 for each boost converter of the rectifier.

[0066] Furthermore, in this variant, processing unit 36 ​​is configured to perform a second implementation of calculation sub-step 42, following the first implementation of calculation sub-step 42, when the source 8 connected to rectifier 11 is an AC power grid. In this case, for each phase 9 of the AC power grid, processing unit 36 ​​is configured to calculate the corresponding line inductance as equal to the determined charging circuit inductance minus the inductance of the boost converter coil 24 connected to the rectifier of that phase 9. Thus, this operation results in only the line inductance being calculated. Preferably, in this case, based on the value of the line inductance, processing unit 36 ​​is configured to generate an alarm characterizing the charger's use under non-recommended operating conditions.

[0067] Preferably, in this case, assuming that the line inductance does not change with the current, the inductance of the charging circuit is preferably only for the target current I. c It is determined by a value, that is, the given inductance value for coil 24.

[0068] run The operation of the control device 12 will now be described with reference to the accompanying drawings.

[0069] During the preparatory parameterization step, the predetermined nominal inductance model L is stored in the processing unit 36.

[0070] Subsequently, during the connection step, rectifier 11 is connected to each phase 9 of source 8 to charge battery 4. For each phase 9, this charging is performed with a target current I. c Related, for example, depending on the operating conditions.

[0071] For each phase 9, the corresponding current sensor 30 provides a current I characterizing the current flowing between said phase 9 and rectifier 11. m The measurement signal.

[0072] Subsequently, for each phase 9, the controller 32 determines the target current I according to the corresponding target current. c and measuring current I m Generate the corresponding setting signal U L .

[0073] Furthermore, the modulator 34 is based on the setting signal U provided by the controller 32. L Generate control signals to drive the rectifier 11.

[0074] Subsequently, the processing unit 36 ​​performs at least one parameterization step 40.

[0075] More specifically, during calculation sub-step 42 of parameterization step 40, processing unit 36 ​​calculates the inductance of the corresponding charging circuit for each phase 9 from the following: - The predetermined nominal inductor model L; - Current I consumed by rectifier 11 m ; - The setting signal U provided by controller 32 L ;as well as - Transfer function of controller 32.

[0076] Subsequently, during update sub-step 44, for each phase 9, processing unit 36 ​​updates the transfer function of controller 32 based on the calculated inductance.

[0077] Preferably, if the source 8 connected to the rectifier 11 is a grid simulator simulating an AC grid with zero line inductance for each phase, the processing unit 36 ​​performs the first implementation of the calculation sub-step 42, in which the processing unit 36 ​​determines the inductance of the corresponding coil 24 for each boost converter of the rectifier 11.

[0078] Subsequently, when rectifier 11 is connected to the AC power grid, processing unit 36 ​​performs a second implementation of calculation sub-step 42. More specifically, for each phase 9 of the AC power grid, processing unit 36 ​​calculates the corresponding line inductance, which is equal to the determined charging circuit inductance minus the inductance of the boost converter coil 24 connected to the rectifier of that phase 9.

[0079] Preferably, in this case, the processing unit 36 ​​generates an alarm characterizing that the charger is being used under non-recommended operating conditions, based on the value of the line inductance.

[0080] Of course, the present invention is not limited to the examples just described.

Claims

1. A method for controlling a rectifier (11), said rectifier (11) being connected at its input to each phase (9) of an AC source (8) to form a charging circuit, and configured to consume current for each phase (9) according to a setting signal provided by a controller (32), said controller (32) being characterized by a transfer function, The control method includes implementing a parameterization step (40), which for each phase (9) of the source (8) includes the following sub-steps: • generating, by the controller (32), a set signal (U L ), the set signal (U L ) being representative of a target current (I c ) to be drawn by the rectifier (11); • determining a value (Lo) of a predetermined nominal model (L) for a current equal to said target current (I c ) -• By using the setting signal (U) L The normalized setting signal (U') is calculated by dividing the value (L0) of the determined nominal model (L); -• By solving the current I flowing between the phase (9) and the rectifier (11) m The constant (K) is estimated by the linear equation associated with the normalized setting signal and the transfer function of the controller (32); -• The inductance of the corresponding charging circuit is calculated by multiplying the nominal model (L) by the estimated value of the constant (K); • The coefficients of the transfer function of the controller (32) are updated (44) based on the determined inductance; and For each phase (9) of the source (8), the inductance of the charging circuit includes at least one of the following: the inductance of the coil (24) of the corresponding boost converter (28) of the rectifier (11), and the line inductance of the phase (9) of the source (8).

2. The method of claim 2, wherein, For each phase of the source, the constant is estimated according to the following relationship: [Mathematical Formula 5], in: -• K is the constant mentioned above; -• T e The sampling period; -• p represents any time point in the calculation; -• p 1 represents the calculation time prior to time p; -• I m (p) represents the current consumed by the rectifier at time p; and -• U'(p) is the value of the normalized setting signal provided by the controller at calculation time p, and the normalized setting signal is equal to the result obtained by dividing the setting signal by the nominal model.

3. The method as described in claim 2 or 3, wherein, For each phase (9), the updated transfer function is equal to the product of the following: firstly, the nominal transfer function determined by the nominal model of the coil (24) of the corresponding boost converter (28), and secondly, the estimated constant.

4. The method according to any one of claims 1 to 4, wherein, For each phase (9) of the source (8), the calculation (42) of the inductance of the charging circuit also depends on the predetermined internal resistance of the coil (24) of the corresponding boost converter (28) of the rectifier (11).

5. The method of any one of claims 1 to 5, further comprising, prior to the update: -• For the first implementation of the calculation sub-step (42), for each boost converter (28) of the rectifier (11), the inductance of the corresponding coil (24) is determined, wherein the source (8) to which the rectifier (11) is connected is a grid simulator configured to simulate an AC grid presenting zero line inductance for each phase (9). -• A second implementation of the calculation sub-step (42) following the first implementation of the calculation sub-step (42), wherein the source (8) to which the rectifier (11) is connected is an AC power grid, and for each phase (9) of the AC power grid, the corresponding line inductance is equal to the determined charging circuit inductance minus the inductance of the coil (24) of the boost converter (28) connected to the rectifier of that phase.

6. The method according to any one of claims 1 to 6, wherein, For each phase (9), the controller (32) has a transfer function, the numerator and denominator of which are both first-order polynomials.

7. A control device (12) for controlling a rectifier (11), said rectifier (11) being used to connect at its input to each phase (9) of an AC source (8) to form a charging circuit, and being configured to consume current for each phase (9) according to a setting signal provided by a controller (32). The control device (12) includes a processing unit (36) configured to perform a parameterization step (40), which, for each phase (9) of the source (8), includes the following sub-steps: -• Calculate the inductance of the corresponding charging circuit based on the following: (42) • Pre-defined nominal inductor model; • The current consumed by the rectifier (11); • A setting signal provided by the controller (32) and characterizing the target current to be consumed by the rectifier (11); and • • The transfer function of the controller (32); • The coefficients of the transfer function of the controller (32) are updated according to the determined inductance (44); and For each phase (9) of the source (8), the inductance of the charging circuit includes at least one of the following: the inductance of the coil (24) of the corresponding boost converter (28) of the rectifier (11) and the line inductance of the phase (9) of the source (8).

8. A charger (6) comprising a rectifier (11) and a control device (12) as claimed in claim 8 for controlling the operation of the rectifier (11).

9. An electric vehicle (2) comprising a charger (6) as claimed in claim 9, the charger (6) being connected at its output to a battery (4) of the electric vehicle (2).

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