Method and related device for controlling a switching member

Abstract

The invention relates to a method for controlling at least one switching component (33) by a control component (44) belonging to a power module (40), the method comprising: receiving at least one set of parameters by the control component (44) to calculate at least one control rule of the switching component (33), performing at least one operation based on each set of parameters by the at least one control component (44) to obtain at least one control rule, and sending each obtained control rule by the control component (44) to the switching component (33).

Description

[Technical field]

[0001] The invention relates to a method for operating a switching member. The invention also relates to an associated power module, a railway vehicle, a railway installation, a computer program product and a readable information carrier. [Background technology]

[0002] In railway installations, numerous interactions in the form of signals occur between the various elements belonging to the railway installation.

[0003] As a specific example, a power system such as a traction system of a railway vehicle is controlled by a central controller which sends all control commands for each power switching device belonging to the traction system. Such control commands are sent via a wired link formed by cables.

[0004] However, the amount of data exchanged between the central controller and the switching devices continues to increase. There are several reasons for this increase.

[0005] First, the cutoff frequency is getting higher and higher, partly because the switching device is increasingly compatible with large cutoff frequencies and partly because the quality of energy conversion is better with larger cutoff frequencies. This means that the rhythm of sending commands starts to increase.

[0006] Secondly, due to the increase in energy conversion requirements, current power systems involve more and more switching devices. Thus, even if the rhythm is the same, all control commands should be added to each new switching device added.

[0007] In order to cope with this increase in the frequency of cut-offs and in the number of switching devices, it is known to replace the wired links with optical links, which makes it possible to increase the amount of information that can be transmitted between the central controller and the switching devices.

[0008] However, due to high transmission error rates, the maximum information throughput that optical links enable is not achieved in practice.

[0009] The transmission error rate is the number of errors per unit time. Since this rate is proportional to the amount of data transmitted by the optical link, the error rate is high.

[0010] Additionally, in such real-time applications, known error correction techniques have limited effectiveness because the time involved in their implementation is typically too long compared to the latency that the power system can tolerate, the latency being defined as the time interval between the moment data is calculated and the moment it is actually applied.

[0011] In order to ensure good reliability of railway facilities, especially in terms of train running safety, the amount of data transmitted in the network should be reduced.

[0012] Therefore, there is a need for a method that enables manipulation of at least one switching member that is compatible with an increase in the cut-off frequency and the number of switching devices. [Summary of the invention]

[0013] To this end, a method for controlling at least one switching component by a control component belonging to a power module is proposed, the method comprising: receiving at least one set of parameters by the control component to calculate at least one control rule of the switching component, performing at least one operation based on each set of parameters by the at least one control component to obtain at least one control rule, and sending each obtained control rule by the control component to the switching component.

[0014] According to a particular embodiment, the method comprises one or more of the following features considered individually or in any technically possible combination:

[0015] The power module is controlled by a central controller, and the method further comprises sending the at least one set of parameters to the control component by the central controller.

[0016] - The control principle is pulse width modulation.

[0017] - At least one operation is an operation using a table associating a value to at least one parameter of a set of parameters received by the power module.

[0018] The steering rule is obtained based on the desired function and the cutoff function, the set of parameters comprising a quantity representing the frequency of the desired function and a quantity representing the amplitude ratio between the desired function and the cutoff function.

[0019] - The parameters in the group of parameters have a size between 16 bits and 24 bits.

[0020] A control member adapted to control at least one switching member is also proposed, the control member being adapted to: receive at least one set of parameters for calculating at least one control rule of the switching member, perform at least one operation based on each set of parameters to obtain at least one control rule, and send each obtained control rule to each switching member.

[0021] The invention also aims at a railway vehicle comprising a power module, the power module comprising a control member and a switching member as described above.

[0022] According to a particular embodiment, the power module is capable of controlling the supply of electrical energy to the traction motor.

[0023] The invention also aims at a railway facility comprising a power module, the power module comprising a control member and a switching member as described above.

[0024] According to a particular embodiment, the power module is capable of controlling the supply of electrical energy to the traction motor.

[0025] A computer program product is also proposed comprising a readable information carrier on which is stored a computer program comprising program instructions, which computer program can be loaded on a data processing unit and is adapted to cause at least one step of the method as described above to be performed when the computer program is executed on the data processing unit.

[0026] The invention also relates to a readable information carrier storing a computer program comprising program instructions, which computer program can be loaded on a data processing unit and is adapted to cause at least one step of the method as described above to be performed when the computer program is executed on the data processing unit.

Brief Description of the Drawings

[0027] Other features and advantages of the invention will become apparent on reading the following description of embodiments of the invention, which description is given by way of example only and with reference to the accompanying drawings, which are:

[0028] - Figure 1 is a schematic representation of a part of a railway installation including electronic equipment,

[0029] - Figure 2 is a schematic representation of an electronic device,

[0030] - Figure 3 is a flowchart of an implementation example of a control method,

[0031] - Figure 4 is a timing diagram showing an example of a modulation signal (modulante), a truncation function and a corresponding steering rule, the steering rule being obtained based on the truncation function and the modulation signal, and

[0032] - Figure 5 yes Figure 4 A flow chart of an embodiment of the steps of a method implemented thereof is illustrated in FIG. [Specific implementation method]

[0033] exist Figure 1 A portion of a railway installation 10 is shown in FIG.

[0034] The railway facility 10 is a facility including a railway network and railway vehicles.

[0035] Railway vehicles such as subways, trains, or trams are equipped with emergency ventilation.

[0036] The railway vehicle includes a control system 12 and a set of electronic equipment 14 .

[0037] In the example described, the control system 12 and the set of electronics 14 form a traction system for a railway vehicle.

[0038] The control system 12 includes a central controller 16 and a wired network 18 .

[0039] The central controller 16 is capable of operating each electronic device 14 .

[0040] According to the described example, the central controller 16 is a control unit of a traction chain of a railway vehicle.

[0041] The central controller 16 is, for example, a computer.

[0042] More generally, the central controller 16 is an electronic computer capable of manipulating data represented as electronic or physical values ​​in registers and / or memory of the central controller 16 .

[0043] The central controller 16 comprises a processor 20 comprising a data processing unit 22, a memory 24 and an information carrier reader 26 capable of reading a readable information carrier comprising a computer program product 28. The central controller 16 further comprises a keyboard 30 and a display unit 32.

[0044] The computer program product 28 comprises a readable information carrier.

[0045] A readable information carrier is a carrier which can be read by the central controller 16, typically by the data processing unit 22. A readable information carrier is a medium which is adapted to store electronic instructions and which can be coupled to a bus of an information technology system.

[0046] For example, the readable information carrier is a small disk or a floppy disk (called "floppy disk" in English), an optical disk, a CD-ROM, a magneto-optical disk, a ROM memory, a RAM memory, an EPROM memory, an EEPROM memory, a magnetic card, an optical card, a flash memory, or an SSD disk.

[0047] A computer program including program instructions is stored on a readable information carrier.

[0048] The computer program may be loaded onto the data processing unit 22 and adapted so as to carry out the calculations.

[0049] The wired network 18 is a set of cables.

[0050] At least one cable connects the central controller 16 to each electronic device 14 .

[0051] Each electronic device 14 is a high voltage device. By such expression it is to be understood that each electronic device 14 is intended to be supplied with a high voltage, ie a DC voltage having a nominal value greater than or equal to 600 Vdc, typically. For example, in the example shown, the supply voltage of each electronic device 14 is equal to 1500 Vdc.

[0052] exist Figure 2 An example of electronic device 14 can be seen in FIG.

[0053] The electronic device 14 comprises a power module 40 , an electrical link 38 and a control member 44 . The power module 40 comprises a plurality of switching members 33 formed by a switching device 34 and a gate control 36 .

[0054] The power module 40 is generally referred to by the English term “power module”.

[0055] The power module 40 is preferably capable of handling the supply of electrical energy to the traction motor.

[0056] By way of example (but this is not limiting), in Figure 2 Two switching components 33 , namely two switching devices 34 and two door controls 36 , are shown.

[0057] Each switching device 34 is a power switching device.

[0058] Additionally, in the case of this figure, each switching device 34 is a transistor.

[0059] According to the example described, each switching device 34 is, for example, a bipolar transistor with an insulated gate (also referred to by the acronym IGBT, which originates from the English term “Insulated Gate Bipolar Transistor”).

[0060] In this case, each switching device 34 is a component including three terminals, which are referred to as a gate 34G (also referred to by the English term “gate”), a collector 34C, and an emitter 34E.

[0061] Additionally, each switching device 34 is brought to a very high voltage which can be up to several kilovolts.

[0062] Each switching device 34 is electrically connected to the rest of the circuit through electrical links 42E and 42C (also referred to as pins 42E and 42C). At least one of the pins 42E or 42C is a busbar.

[0063] Each switching device 34 is also electrically connected to a corresponding gate control 36 at a gate 34G via an electrical link 42G.

[0064] Each gate control 36 is also called by the English term "gate driver".

[0065] Each door control 36 is able to actuate a corresponding switching device 34 .

[0066] An electrical link 38 connects the operating member 44 to each switching member 33 and more precisely to each door control 36 .

[0067] The actuation member 44 can actuate each switching member 33 . More specifically, the actuation member 44 can actuate all switching devices 34 via the door control 36 .

[0068] The operating member 44 is also referred to as an igniter.

[0069] As a specific example, the igniter is a calculator or a microprocessor.

[0070] As a variant, the control member 44 is a programmable logic circuit.

[0071] By definition, a programmable logic circuit is a logic integrated circuit that can be reprogrammed after fabrication.

[0072] For example, the control member 44 is an FPGA circuit. FPGA is an acronym derived from the English name "Field-programmable gate array", which is usually translated as field programmable gate network.

[0073] As a variant, the manipulation component 44 is a PLD circuit (PLD is an acronym derived from the English name “Programmable logic device”, usually translated as a programmable logic circuit), an EPLD circuit (EPLD is an acronym derived from the English name “Erasable programmable logic device”, usually translated as an erasable programmable logic circuit), a CPLD circuit (CPLD is an acronym derived from the English name “Complex programmable logic device”, usually translated as a complex programmable logic circuit), a PAL circuit (PAL is an acronym derived from the English name “Programmable arraylogic”, usually translated as a programmable logic network), or a PLA circuit (PLA is an acronym derived from the English name “Programmable logic array”, usually translated as a programmable logic network).

[0074] According to another variant, the control member 44 is an ASIC-type circuit (ASIC is an acronym derived from the English name “application-specific integrated circuit”, literally meaning integrated circuit adapted to an application).

[0075] Reference now Figure 3 Describe the operation of the railway facility 10, Figure 3 A flow chart of an example of implementation of a method for actuating two switching devices 34 is shown.

[0076] The control method is intended to control the two switching devices 34 , ie to electrically actuate each of the two switching devices 34 .

[0077] The method comprises a calculation step E10 , a first sending step E12 , a first receiving step E14 , a step E16 of implementing at least one operation, a second sending step E18 , a second receiving step E20 , and an application step E22 .

[0078] In a first calculation step E10 , the central control unit 16 calculates the control rules L1 and L2 to be applied to each switching member 33 .

[0079] The actuation rule of the switching member 33 comprises all opening and closing commands of the switching member 33 , more precisely of the switching device 34 .

[0080] Each control rule L1 and L2 is a pulse width modulation. Such a modulation is referred to by the acronym MLI (from the French term) or the acronym PWM (from the English term “Pulse Width Modulation”).

[0081] Each control law L1 and L2 is then a square wave digital signal that changes between two states (low and high). This square wave signal has a fixed frequency but exhibits a digitally controlled duty cycle.

[0082] As a result, each of the control rules L1 and L2 enables an analog signal that can vary over time to be applied on average to the load connected to the switching device 34 .

[0083] The analog signal obtained is called the modulated signal.

[0084] exist Figure 4 An example of a modulation signal is shown in FIG. 5 in the form of a first curve C2.

[0085] Since the modulating signal is periodic, it has a frequency, which is called the frequency of the modulating signal.

[0086] The modulated signal also has a maximum amplitude (the difference between the maximum and minimum values) reached in each cycle.

[0087] The number of points of the modulated signal obtained in one period of the modulated signal is called the number of samples.

[0088] Furthermore, the modulated signal has a waveform.

[0089] For example, Figure 4 As can be seen in the figure, the waveform of the modulated signal is a sine wave.

[0090] In order to obtain the control law to be applied to the switching member 33 , a cutoff function should also be defined.

[0091] exist Figure 4 Such a function is also shown in the form of a second curve C1.

[0092] In this example, the truncation function is an asymmetric trigonometric function.

[0093] The truncation function has a cutoff frequency and a maximum amplitude (the difference between the maximum and minimum values) reached in each cycle.

[0094] It is important to note that the cutoff frequency is the product of the frequency of the modulating signal and the number of samples.

[0095] The modulation ratio is the ratio of the maximum amplitude of the modulating signal to the maximum amplitude of the truncation function.

[0096] As in Figure 4 As can be seen in , the analysis of the two curves C1 and C2 enables the control law to be obtained to be applied to the switching member 33. Figure 4 , the control rule to be applied is represented by a third curve C3 , which corresponds to a PWM signal to be applied to the switching member 33 .

[0097] It should be noted that in practice, when the traction chain feeds a three-phase engine, the control rules of each switching device associated with one phase are diverged from the rules of the switching devices associated with the other phases, in order to ensure, for example, a phase shift of 120° between each phase.

[0098] For each calculated maneuvering law L1 and L2 , the central control unit 16 derives one or more calculation parameters.

[0099] The frequency of the modulation signal, the waveform of the modulation signal, the cutoff frequency, and the modulation ratio are specific examples of the calculation parameters.

[0100] In the following, one or more calculated parameters derived for one control rule are referred to as a set of parameters.

[0101] Depending on the circumstances, the set of parameters includes one calculated parameter or more than one calculated parameter.

[0102] In a first sending step E12 , the central controller 16 sends to each power module 40 the set of parameters corresponding to each driving rule L1 and L2 to be applied to each switching device 33 of the power module 40 .

[0103] According to the proposed example, the central controller 16 sends a first set of parameters for the first switching member 33 and a second set of parameters for the second switching member 33 to the power module 40, and in particular Figure 2 The control component 44.

[0104] The first sending step E12 is carried out regularly and at a sufficiently fast rhythm to ensure real-time information transmission.

[0105] For example, the transmission rhythm is between 10 kHz and 100 kHz.

[0106] In a first receiving step E14 , the control member 44 of the power module 40 receives each set of parameters sent in the first sending step E12 .

[0107] The operating member 44 then carries out at least one operation which corresponds to the step with reference number E16 .

[0108] Several operation examples are presented below.

[0109] According to a first example, the steering member 44 comprises a memory storing pre-calculated tables associating the steering rules to be applied to certain parameters.

[0110] As an example, the table may relate the steering rules to the frequency and modulation ratio of the modulation signal.

[0111] In such an example, step E16 consists in carrying out a single operation of reading in this table the maneuvering rules corresponding to the parameters present in the precalculated table.

[0112] Such a first example is compatible with a relatively limited number of modulation signals.

[0113] According to a second example, the steering member 44 comprises a memory storing a table associating associated steering rules to certain parameters of the modulation signal having a reference frequency.

[0114] Furthermore, the manipulation member 44 is able to project any modulation signal at a given frequency onto a modulation signal with a corresponding reference frequency, that is to say a modulation signal with the same parameters except for the frequency.

[0115] The control member 44 and more generally each control member 44 receives a common time reference signal. Each control member 44 is able to generate a modulation signal based on the frequency of the modulation signal transmitted by the central controller 16, based on a stored table associated with the received set of parameters, and based on the time reference signal (also called clock signal).

[0116] For example, the manipulation member 44 can read a data table including amplitude values ​​for the modulation signal and a sampling frequency associated with the frequency of the modulation signal based on the received clock signal.

[0117] In the example where the frequency of the received modulation signal is equal to 50 Hz and the data table includes 2000 samples corresponding to the form of the modulation signal, the sampling frequency or reading frequency of the data table is, for example, 100 KHz (50 x 2000). Thus, the control member 44 reads the data table every 10 microseconds (μs) and retrieves the continuous amplitude values ​​stored in the data table every 10 μs to generate a modulation signal whose amplitude will correspond to the value read in the data table at the corresponding reading moment.

[0118] Advantageously, the steering member 44 uses the Bresenham principle to associate to each cycle an address to be retrieved in a data table to generate the amplitude value of the modulation signal.

[0119] Likewise, the manipulation member 44 can generate the truncation function based on the cutoff frequency transmitted by the central controller 16 and based on the maximum and / or minimum amplitude values ​​of the truncation function transmitted by the central controller 16 or stored.

[0120] For example, the truncation function has a triangular waveform, and the manipulation member 44 generates the truncation function based on a time counter, i.e., a clock signal that increases from 0 to 1 / (4x(truncation frequency)) four times in succession. Depending on the quadrant considered, the manipulation member 44 adds the amplitude maximum value Vmax to the amplitude variable or subtracts the maximum amplitude value Vmax from the amplitude variable. Thus, it changes from 0 to Vmax, then from Vmax to 0, then from 0 to -Vmax, and then from -Vmax to 0.

[0121] In this way, the steering member 44 is able to compare the modulation signal with the value of the cut-off function in each reading cycle in order to generate a steering rule to be applied to the switching device(s) 34 .

[0122] In such an example, step E16 comprises implementing the following operations: a projection operation, an operation of reading in a table the steering rules corresponding to the parameters present in the table, and an operation of projecting the standardized steering rules to the steering rules corresponding to the desired modulation signal.

[0123] Such a second example is compatible with a relatively limited number of amplitudes for the required modulation signal.

[0124] According to a third example, the steering member 44 comprises a memory storing a table associating associated steering rules to certain parameters of the modulation signal having a reference amplitude.

[0125] Furthermore, the manipulation member 44 is able to project any modulation signal at a given amplitude onto a modulation signal with a corresponding reference amplitude, that is to say modulation signals with the same parameters except for the amplitude.

[0126] The manipulation member 44 can also vary the amplitude of the truncation function so that it has the amplitude required for the modulation signal.

[0127] Such a third example is compatible with a relatively limited number of frequencies for the required modulation signal.

[0128] The fourth example corresponds to using the second example and the third example simultaneously.

[0129] For instance, in such an example, the steering component 44 can generate any steering rules based on a table having at least 1024 16-bit signed full words.

[0130] To this end, for example, while taking into account the existence of decimal numbers, the actual value of the modulated signal is multiplied by 32768 and then stored to uniquely obtain an integer.

[0131] Such a table contains the values ​​of a function over its period.

[0132] As an example, for a sinusoidal modulated signal, address value 0 corresponds to a sine value of 0, and address value 1023 corresponds to a sine value of 2π. More generally, address value i (i is an integer between 0 and 1023) corresponds to a sine value of 2π*i / 1023.

[0133] In this case, a linear surjective function is used (i.e. x gives 2π*i / 1023).

[0134] However, where appropriate, the surjective function may be different to better account for desired variations in the modulation signal, particularly where a portion of the modulation signal is constant since no points in that portion need to be calculated.

[0135] It is also noted that this table is compatible with any form of function that modulates the signal.

[0136] Furthermore, in such examples, the manipulation component 44 performs only simple integer addition and comparison operations.

[0137] Reference now Figure 5 Describe a specific implementation example of the fourth example, Figure 5 A specific embodiment of step E16 is illustrated.

[0138] according to Figure 5 In the example of , step E16 is organized into three operation blocks, which are respectively called the first block B1, the second block B2 and the third block B3.

[0139] Again, as in the previous example, a table is used.

[0140] The first block B1 aims to reconstruct the modulated signal.

[0141] In the first block B1 , the period of the frequency of the modulated signal is received, which parameter is called the first parameter P1 .

[0142] In a first block B1 , an operation of counting the time elapsed between 0 and a first parameter P1 is implemented.

[0143] Such counting operation is performed at the rate of clock H which is also provided at the input of the first block B1.

[0144] This clock corresponds to a frequency of 50 megahertz (MHz), for example.

[0145] At each instant measured by the counting operation, the aforementioned surjective function is implemented to project the time interval elapsed from a reference point (usually the beginning of the desired period of the modulation signal) to the address of the table used.

[0146] The obtained address is used to obtain the current value of the modulation signal by reading the contents of the table.

[0147] When the counting operation reaches the value P1, a reset operation is performed and the counting operation is restarted at 0.

[0148] The first block B1 operates continuously.

[0149] The second block B2 is implemented simultaneously with the first block B1.

[0150] The second block B2 aims to reconstruct the truncation function based on the second parameter P2 and the third parameter P3.

[0151] In the presented example, each of the three parameters P1 to P3 is a signed integer.

[0152] Furthermore, these three parameters include at least 24 bits.

[0153] More generally, the number of bits is chosen so that the magnitude of the truncation can be larger compared to the table value.

[0154] In this way, the second block B2 makes it possible to obtain the magnitude of the truncated function in the form of a 24-bit signed variable.

[0155] In this case, according to the described example, the truncation function is a symmetrical triangular waveform with a period of 4xP2 and a maximum amplitude equal to P2xP3.

[0156] In the example presented, the second parameter P2 is one quarter of the period of the truncation function, while the third parameter P3 is such that the product of the second parameter and the third parameter is equal to the maximum positive amplitude of the truncation function.

[0157] The second block B2 implements a counting operation of the time elapsed between 0 and P2, and this is continued four times. This makes it possible to divide the period of the truncation function into four quadrants.

[0158] The second block B2 adds P3 to or subtracts P3 from the amplitude variable, depending on the quadrant considered.

[0159] In this way, the amplitude value of the truncation function changes from 0 to P2xP3 in the first quadrant, then changes from P2xP3 to 0 in the second quadrant, then changes from 0 to -P2xP3 in the third quadrant, and then changes from -P2xP3 to 0.

[0160] Similar to the case of the first block B1, the second block B2 operates continuously.

[0161] The third block B3 makes it possible to obtain the value of the control rule based on the output values ​​of the first block B1 and the second block B2 by a simple comparison step.

[0162] In all the cases described, each operation performed by the manipulating member 44 uses, directly or indirectly, at least one element of a set of parameters received, that is to say one of the parameters of a set of parameters or a quantity resulting from one of the parameters of a set of parameters.

[0163] In other words, the steering member 44 calculates the steering rule L1 or L2 to be applied to each switching member 33 as a function of the corresponding set of parameters received.

[0164] In a second transmission step E18 , the actuation component 44 of the power module 40 transmits each actuation rule L1 or L2 to the gate control 36 of the switching device 34 to which this actuation rule L1 or L2 is to apply.

[0165] In a second receiving step E20 , each door control 36 receives actuation rules L1 or L2 .

[0166] More precisely, the first door controller 36 receives a first actuation rule L1 and the second door controller 36 receives a second actuation rule L2 .

[0167] In an application step E22 , each door control 36 applies the received actuation rule L1 or L2 to the associated switching device 34 .

[0168] In particular, the first door control 36 applies the first actuation rule L1 to the first switching device 34 , while the second door control 36 applies the second actuation rule L2 to the second switching device 34 .

[0169] In this way, the first switching device 34 follows the desired first actuation rule L1 , and likewise, the second switching device 34 follows the desired second actuation rule L2 .

[0170] The control method thus makes it possible to ensure efficient control of the switching device 34 without all control rules having to be sent from the central controller 16 to each control member 44 of the power module 40 .

[0171] Only groups of parameters are transferred.

[0172] In this way, the method enables a significant reduction in the amount of information transmitted between the central controller 16 and the power modules 40. Typically, by means of such a method, a reduction factor of the order of millions can be achieved.

[0173] Additionally, this enables redundancy of information to be promoted.

[0174] Tests carried out by the applicant have shown that the obtained control rules are compatible with the safety requirements of the railway authorities.

[0175] The method is also independent of the technology used to communicate between the central controller 16 and the power modules 40 .

[0176] In particular, a wired architecture may be maintained between the various components, which helps to achieve good electromagnetic compatibility for the railway facility 10 .

[0177] The wired case also enables the performance variation over temperature issues encountered by optical links to be circumvented.

[0178] It is also noted that implementation of the method on existing architectures can be achieved by simply reprogramming the components, typically by loading the appropriate programs on the central controller 16 and each control member 44. In addition, if desired, the method can be implemented on only a portion of the installation by reprogramming only the required control members 44.

[0179] In summary, the proposed method enables one or more switching members 33 to be manipulated in a simple and practical manner, while remaining compatible with an increase in the cut-off frequency and the number of switching devices 34 .

[0180] All embodiments just described can be combined to form further embodiments when these embodiments are technically compatible.

Claims

1. A method for controlling at least one transistor (34) by a control component (44) belonging to a power module (40), wherein the power module (40) is controlled by a central controller (16), the method comprising the following steps: - sending at least one set of parameters to a control member (44), said sending step being performed by said central controller (16), - receiving, by a control member (44), the at least one set of parameters for calculating at least one control rule of the transistor (34), - implementing at least one operation based on each set of parameters to obtain at least one steering rule, said implementing step being performed by said steering member (44), and - sending the at least one control rule obtained by the implementation step to the transistor (34), the sending step being performed by the control member (44) via the gate control (36), in, The steering rule is obtained based on the desired function and the cutoff function, and the set of parameters includes a quantity representing the frequency of the desired function and a quantity representing the amplitude ratio between the desired function and the cutoff function.

2. The method according to claim 1, wherein: The control principle is pulse width modulation.

3. The method according to claim 1, wherein: At least one operation is an operation using a table that associates a value to at least one parameter of a set of parameters received by the power module (40).

4. The method according to any one of claims 1 to 3, wherein: The parameters in the group of parameters have a size between 16 bits and 24 bits.

5. A control member (44) adapted to control at least one transistor (34), the control member (44) being adapted to: - receiving at least one set of parameters for calculating at least one control rule for a transistor (34), - performing at least one operation based on each set of parameters to obtain at least one manipulation rule, and - sending the obtained at least one control rule to each transistor (34), said sending step being performed by the control means (44) via the gate control (36).

6. Railway vehicle or railway facility, comprising a power module (40), the power module (40) comprising the control component (44) according to claim 5 and a transistor (34).

7. The railway vehicle or railway facility according to claim 6, wherein the power module (40) is capable of controlling the supply of electrical energy to the traction motor.

8. A readable information carrier storing a computer program comprising program instructions, which computer program can be loaded on a data processing unit and is adapted to cause the method according to any one of claims 1 to 3 to be performed when the computer program is executed on the data processing unit.

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