Power distribution using distributed control in aircraft

Abstract

The invention relates to a system (100) for exchanging power in an aircraft, the system comprising: a voltage bus (160); a low voltage electromechanical converter (150BP); a high voltage electromechanical converter (150HP); and a voltage control module (125BP, 125HP) for each of the electromechanical converters (150BP, 150HP). The system (100) further comprises: a computer (106) designed to provide an allocation setpoint (S) between the exchanged powers (PHP, PBP), the allocation setpoint (S) varying over time; and for at least one of the electromechanical converters (150BP, 150HP): a module (120BP, 120HP) for ensuring that an allocation setpoint (S) is observed, which module is designed to regulate the power (PBP, PBP) exchanged by the associated electromechanical converter (150BP, 150HP) by taking into account the received evaluation value (PBP DEG, PHP DEG) of the power (PBP, PHP) exchanged by another of the electromechanical converters (150BP, 150HP), in this way, the received allocation setting value (S) is observed.

Description

Technical Field

[0001] The present invention relates to a power exchange device in an aircraft, a propulsion system of an aircraft comprising such a device, an aircraft comprising such a propulsion system, and a corresponding method. Background Art

[0002] In the context of reducing the ecological footprint of aircraft, hybrid electric power appears to be a technical solution that can significantly improve the environmental performance of aircraft, especially by reducing their fuel consumption.

[0003] As known in the related art, the power exchange device in an aircraft includes:

[0004] - a voltage bus, the voltage bus being designed to present a bus voltage;

[0005] a low-voltage (BP) electromechanical converter designed to exchange power between a voltage bus and a low-voltage body of an aircraft's turbine;

[0006] a high-voltage (HP) electromechanical converter designed to exchange power between a voltage bus and a high-voltage body of a turbine of an aircraft; and

[0007] A voltage control module for each electromechanical converter, the voltage control module being designed to control the bus voltage by controlling the electromechanical converter in question in order to regulate the exchanged power.

[0008] The voltage bus is typically part of an electrical network of an aircraft, which may also include sources and / or loads connected to the voltage bus.

[0009] In this way, the electromechanical converter forms the interface between the HP and BP bodies of the turbine and the electrical network of the aircraft.

[0010] In particular, to ensure correct operation of the loads, the bus voltage must be kept within a predetermined range, which is achieved by bus voltage control modules respectively associated with the electromechanical converters.

[0011] These control modules can have zero static bus voltage error, which has the advantage of keeping the bus voltage very close to its set point. However, the two controls of the bus voltage are independent of each other and can compete with each other, causing the power distribution to drift, with one electromechanical converter exchanging all the power and the other exchanging no power at all.

[0012] One of the solutions proposed in the related art to this problem is a so-called "decentralized" device that implements droop control to define the power split between the power exchanged by the low-voltage body and the power exchanged by the high-voltage body by defining a suitable droop coefficient. However, the bus voltage control module then has a non-zero static error, causing the bus voltage to remain far from its set value, which can cause the bus voltage to go out of range when power is called by a load on the electrical network or when power is supplied by a source.

[0013] Furthermore, control of power distribution is highly dependent on the accuracy of bus voltage measurements and requires a high-precision acquisition chain (<1% error).

[0014] Instead, one of the two electromechanical systems should control the bus voltage, while the other system should apply the power draw or power import setpoint from the central computer.

[0015] However, this solution has the disadvantage of not being robust to the loss of the electromechanical system controlling the bus voltage. The other system can reconfigure itself, but from an electrical perspective, the network is lost for a longer period of time. Furthermore, the central computer must constantly send setpoints to the system that is not performing voltage control.

[0016] Another solution in the related art is to propose so-called "centralized" devices, in which an external computer performs the control of the bus voltage and applies or does not apply the power extraction or input setpoint from the central computer and distributes the power or torque setpoint to the two electromechanical converters.

[0017] This system has the advantage of being relatively robust to the loss of one of the two electromechanical converters, which can then control the voltage and distribute the power to be drawn.

[0018] However, the dependency between the centralized computer and the two electromechanical converters requires the addition of fast communication (greater than 10 kHz).

[0019] In addition, Japanese patent application publication number JP 2014 131469A describes two generators coupled to a turbine, and two controllers for controlling the two generators, respectively. Each controller is designed to receive a power ratio set value and a ratio of the current supplied by the associated generator to the total current supplied by the two generators. The ratio is calculated based on the measured value of the current supplied by each generator. Each controller is designed to supply a voltage set value to the associated generator that the generator must supply, which is calculated from the resistance value calibrated in the output filter, which requires accurate knowledge of the resistance value, which is difficult to obtain, especially due to changes in the environment (temperature, etc.). U.S. Patent 11,355,929 is basically similar, except that the precise operation of the controller is not described, and the current ratio is calculated based on the measured value of the current supplied by the associated generator and the measured value of the total current supplied by the two generators.

[0020] Therefore, it may be desirable to provide a power exchange arrangement that avoids at least some of the above-mentioned problems and constraints. Summary of the Invention

[0021] Therefore, a power exchange device for use in an aircraft is proposed, the device comprising:

[0022] - a voltage bus, the voltage bus being designed to present a bus voltage;

[0023] a low-voltage electromechanical converter designed to exchange power between a voltage bus and a low-voltage body of a turbine of an aircraft;

[0024] a high-voltage electromechanical converter designed to exchange power between a voltage bus and a high-voltage body of a turbine of an aircraft; and

[0025] a voltage control module for each electromechanical converter, the voltage control module being designed to control the bus voltage by controlling said electromechanical converter in order to regulate the power exchanged by said electromechanical converter;

[0026] Characterized in that the device also includes:

[0027] - a computer designed to provide a distribution setpoint between the exchanged powers, the distribution setpoint being variable over time; and

[0028] - for at least one of the electromechanical converters:

[0029] a communication module designed to receive a distribution setpoint value provided by the computer and an estimate of the power exchanged by another of the electromechanical converters, and

[0030] A module for complying with an assigned setpoint, the module being designed to regulate the power exchanged by the electromechanical converter in order to comply with the received assigned setpoint by taking into account a received estimate of the power exchanged by another of the electromechanical converters.

[0031] The present invention enables decentralized voltage control (i.e., independent voltage control from one electromechanical converter to another) and distributed power control (i.e., distribution of the power exchanged by the electromechanical converters). This distribution can be defined using a distribution setpoint and modified over time. Compliance with this distribution setpoint prevents power distribution from drifting.

[0032] In particular, the present invention is compatible with zero static error voltage control on both sides, thereby ensuring robustness in case of loss or failure of control on one side.

[0033] The power exchange device according to the present invention may further comprise one or more of the following optional characteristics in any technically possible combination.

[0034] Optionally, the module for complying with the distribution setpoint is designed to regulate the power exchanged by the mentioned electromechanical converter by modifying the voltage setpoint, such that the voltage control module of the mentioned electromechanical converter controls the bus voltage to the modified bus voltage.

[0035] Also optionally, the means for complying with the assigned setpoint is designed to apply a voltage correction value to the voltage setpoint in the voltage control means.

[0036] The fact that the correction value is applied to the voltage setpoint means that if the distribution setpoint compliance module fails so that it no longer provides a correction value (equivalent to a zero correction value), the DC voltage control module automatically continues to operate by controlling the voltage to the voltage setpoint. This prevents the fault from spreading.

[0037] Optionally, each voltage control module includes:

[0038] a setpoint determination module designed to determine an exchange setpoint for the electromechanical converter; and

[0039] A control module designed to control the electromechanical converter in such a way that the electromechanical converter complies with the switching setpoints.

[0040] Optionally, the exchange setpoint is also a power setpoint to be exchanged between the mentioned electromechanical converter and the voltage bus.

[0041] Also optionally, the exchange setpoint is a current setpoint to be exchanged between the mentioned electromechanical converters and the voltage bus, or alternatively, each of the electromechanical converters comprises an electric machine coupled to an associated body, the exchange setpoint being a torque setpoint of the electric machine.

[0042] Optionally, the module for complying with assigned setpoints is further designed to:

[0043] - determining a desired exchange setpoint to comply with the received allocation setpoint by taking into account a received estimate of the power exchanged by another of the electromechanical converters; and

[0044] - Controlling the switching setpoint of the mentioned electromechanical converter to a desired switching setpoint.

[0045] Optionally, the module for complying with the assigned setpoints further comprises:

[0046] a comparator designed to calculate the error between the desired exchange setpoint and the exchange setpoint; and

[0047] A corrector designed to calculate a voltage correction value based on this error.

[0048] Still optionally, the means for complying with the assigned setpoint is designed to determine a desired exchange setpoint in order to comply with the received assigned setpoint by taking into account a received evaluation of the power exchanged by another of the electromechanical converters, and the means for complying with the assigned setpoint comprises:

[0049] a comparator designed to calculate the difference between the error between the desired exchange setpoint and the exchange setpoint of the electromechanical converter in question on the one hand and the error between the desired exchange setpoint and the exchange setpoint of another electromechanical converter on the other hand; and

[0050] A corrector is designed to calculate a voltage correction value based on this difference.

[0051] Optionally, the corrector has zero static error.

[0052] Still optionally, the communication module is further configured to receive an allocation mode indication from a plurality of predetermined allocation modes, and the module for complying with the allocation setting value is further configured to determine the desired exchange setting value based on the received allocation mode indication.

[0053] Optionally, the predetermined allocation mode includes at least one of the following:

[0054] - a proportional allocation mode, in which the received power allocation setpoint is a ratio between the powers exchanged, wherein the module for complying with the allocation setpoint is designed to determine the desired exchange setpoint by multiplying or dividing the received evaluation value by the allocation setpoint; and

[0055] - Differential allocation mode, in which the received power allocation setting value is the difference between the exchanged powers, wherein the module for complying with the allocation setting value is designed to determine the expected exchange setting value by adding the received evaluation value to the allocation setting value or by subtracting the received evaluation value from the allocation setting value.

[0056] Optionally, the device further comprises a selection module designed to supply a so-called direct exchange setpoint to the control module of the mentioned electromechanical converter on command instead of the exchange setpoint, so that the power exchanged by the mentioned electromechanical converter is controlled to the direct exchange setpoint.

[0057] Optionally, the exchange setting value is also a power setting value to be exchanged.

[0058] Still optionally, the estimated value of the power exchanged by the other one of the electromechanical converters is a set value of the power to be exchanged of the other one of the electromechanical converters.

[0059] Still optionally, the estimated value of the power exchanged by the other one of the electromechanical converters is a measured value of the power exchanged by the other one of the electromechanical converters.

[0060] A propulsion system for an aircraft is also proposed, comprising a turbine and a device according to the invention.

[0061] An aircraft is also proposed, comprising a propulsion system according to the invention.

[0062] A method for exchanging power in an aircraft is also proposed, characterized in that the method comprises:

[0063] - for each of a so-called low-voltage electromechanical converter designed to exchange power between a voltage bus designed to exhibit a bus voltage and a low-voltage body of a turbine of the aircraft and a so-called high-voltage electromechanical converter designed to exchange power between the voltage bus and a high-voltage body of the turbine of the aircraft: controlling the bus voltage by controlling the said electromechanical converter in order to regulate the exchanged power;

[0064] - providing, by means of a computer, a distribution setpoint between the exchanged powers, the distribution setpoint being variable over time; and

[0065] - for at least one of the electromechanical converters:

[0066] - receiving a distribution setpoint provided by a computer and evaluating the value of the power exchanged by another of the electromechanical converters, and

[0067] - regulating the power exchanged by the electromechanical converter in question to comply with the received distribution setpoint by taking into account the received evaluation of the power exchanged by another of the electromechanical converters.

[0068] A computer program is also proposed, which can be downloaded from a communication network and / or recorded on a computer-readable medium, characterized in that the computer program includes instructions for executing the steps of the method according to the invention when the program is run on a computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The invention will be better understood with the aid of the following description, given by way of example only, and made with reference to the accompanying drawings, in which:

[0070] - Figure 1 is a simplified view of a power exchange arrangement according to the present invention in an aircraft,

[0071] - Figure 2 is similar to Figure 1 , but in different embodiments,

[0072] - Figure 3 yes Figure 2 Functional view of a power distribution compliance module for a high-voltage electromechanical converter coupled to a high-voltage body of a turbine in the arrangement shown,

[0073] - Figure 4 yes Figure 2 Functional view of a power distribution compliance module of a so-called low-voltage electromechanical converter for coupling to a low-pressure body of a turbine in the device shown,

[0074] - Figure 5 yes Figure 2 Functional view of a bus voltage control module for a high-voltage electromechanical converter in the arrangement shown,

[0075] - Figure 6 yes Figure 2 Functional view of a bus voltage control module for a low-voltage electromechanical converter in the arrangement shown,

[0076] - Figure 7 yes Figure 2 Functional view of a control module for a high-voltage electromechanical converter in the arrangement shown,

[0077] - Figure 8 yes Figure 2 Functional view of a control module for a low-voltage electromechanical converter in the arrangement shown,

[0078] - Figure 9 is with Figure 1 A similar view with a selection module to apply setpoints directly,

[0079] - Figure 10 is with Figure 9 A similar view with Figure 2 specific circumstances,

[0080] - Figure 11 yes Figure 1 Functional view of a power distribution compliance module for a high-voltage electromechanical converter in the device shown,

[0081] - Figure 12 yes Figure 1 Functional view of a power distribution compliance module for a high-voltage electromechanical converter in the device shown,

[0082] - Figure 13 yes Figure 3 and Figure 4 The allocation follows a functional view of the variants of the modules; and

[0083] - Figure 14 yes Figure 11 and Figure 12 The assignment in follows the functional view of the module variants. DETAILED DESCRIPTION

[0084] Now refer to Figure 1 , an example of a propulsion system 98 for an aircraft in which the present invention is implemented will be described.

[0085] The propulsion system 98 comprises firstly a turbine 102 comprising a low-pressure body 104 and a high-pressure body 103. The turbine 102 is, for example, an aircraft propulsion turbine.

[0086] Propulsion system 98 also includes a power exchange device 100 .

[0087] The arrangement 100 comprises a voltage bus 160 and at least one electrical load 14, 15, for example connected to the voltage bus 160. Each load 14, 15 corresponds, for example but not limited to, to one or more items of equipment of an aircraft.

[0088] The device 100 also includes an electromechanical converter 150, also known as a low voltage converter BP , electromechanical converter 150 BP Designed to exchange power P between the voltage bus 160 and the low voltage body 104 BPFor example, the low voltage electromechanical converter 150 BP Designed to extract mechanical power from the low voltage body 104 along a first power transfer direction to supply electrical power to the voltage bus 160. Low voltage electromechanical converter 150 BP It is also designed to draw electrical power from the voltage bus 160, for example along the second power transmission direction, to supply mechanical power to the low voltage body 104. In order to exchange power P BP , between the voltage bus 160 and the low voltage electromechanical converter 150 BP The exchange current I BP .

[0089] Similarly, for the high voltage body 103, the device 100 also includes an electromechanical converter 150 called a high voltage converter HP , electromechanical converter 150 HP Designed to exchange power P between the voltage bus 160 and the high voltage body 103 HP For example, the high voltage electromechanical converter 150 HP Designed to extract mechanical power from the high voltage body 103 along a first power transmission direction to supply electrical power to the voltage bus 160. High voltage electromechanical converter 150 HP It is also designed to draw electrical power from the voltage bus 160, for example along the second power transmission direction, to supply mechanical power to the high voltage body 103. In order to exchange power P HP , between the voltage bus 160 and the high voltage electromechanical converter 150 HP The exchange current I HP .

[0090] For example, each electromechanical converter 150 BP , 150 HP The system comprises a motor coupled to the low voltage body 104 or the high voltage body 103, respectively, and an AC / DC converter designed to transfer electrical power between the voltage bus 160 and the motor. In this way, the motor can receive mechanical torque to generate AC current, which is rectified by the AC / DC converter to provide a DC bus voltage V DC The AC / DC converter can also convert the DC voltage V DC Conversion is performed to supply AC power to the electric machine so that the electric machine can provide mechanical torque to inject power into the turbine 102 .

[0091] The device 100 further includes a first electromechanical converter 150 for each of the electromechanical converters 150. BP , 150 HP Voltage control module 125 BP , 125 HP , voltage control module 125 BP , 125 HPDesigned to control the electromechanical converter 150 BP , 150 HP To set the bus voltage V DC Control to voltage setting value V DC *, to adjust the electromechanical converter 150 mentioned BP , 150 HP Exchange power P HP 、P BP Therefore, the voltage control module 125 BP , 125 HP Receive the same voltage setting value V DC *.

[0092] Each voltage control module 125 BP , 125 HP Specifically includes a set value determination module 130 HP , 130 BP , setting value determination module 130 HP , 130 BP Designed to determine the electromechanical converter 150 mentioned BP , 150 HP The physical quantity of the exchange set value to control the bus voltage V DC , the exchange setting value is expressed as G BP *、G HP *, the physical quantity and the exchanged power P BP 、P HP In fact, injecting electric power into the voltage bus 160 tends to increase the bus voltage V DC , while drawing electrical power from the voltage bus 160 tends to reduce the bus voltage V DC Therefore, by adjusting the exchange setting value G BP *、G HP *, can modify the exchanged power P BP 、P HP , so that the electromechanical converter 150 BP , 150 HP Inject or withdraw more or less electrical power and thus modify the bus voltage V DC .

[0093] Exchange setting value G BP *、G HP *For example, the electromechanical converter 150 mentioned BP , 150 HP The set value P of the exchange power BP *、P HP *. This is the case that will be discussed in detail below.

[0094] Alternatively, swap the setpoint G BP *、G HP *May be the electromechanical converter 150 mentioned BP , 150 HP The current I between the voltage bus 160 BP , I HP When the set value V DC *When constant, the bus voltage V is controlled to be at the set value DC Also remains substantially constant, so that the current I BP , I HP Directly represents the exchanged power P BP 、P HP .

[0095] Alternatively, swap the setpoint G BP *、G HP *It can be the set value of the motor torque.

[0096] Voltage control module 125 BP , 125 HP Each of the 140 further includes a control module 140 BP , 140 HP , control module 140 BP , 140 HP Designed to control low voltage electromechanical converters 150 respectively BP , high voltage electromechanical converter 150 HP , to control the physical quantity to its exchange set value G BP *、G HP *.

[0097] The device 100 further comprises an electromechanical converter 150 BP , 150 HP Communication module 110 of at least one electromechanical converter BP , 110 HP and a module 120 for complying with assigned setpoints BP , 120 HP In the example shown, two electromechanical converters 150 BP , 150 HP Each of these two modules 110 BP , 110 HP and 120 BP , 120 HP .

[0098] Communication module 110 BP , 110 HP Designed to receive the exchanged power P HP 、P BPThe distribution set value S between the two, and by another electromechanical converter 150 BP , 150 HP Exchange power P BP 、P HP The evaluation value P BP °, P HP °.

[0099] By another electromechanical converter 150 BP , 150 HP Exchange power P BP 、P HP The evaluation value P BP °, P HP ° can be, for example, an electromechanical converter 150 BP , 150 HP The set value P of the power to be exchanged by the other electromechanical converter in BP *、P HP *.

[0100] Alternatively, the evaluation value P BP °, P HP ° can be, for example, an electromechanical converter 150 BP , 150 HP The power P exchanged by another electromechanical converter in BP 、P HP The measured value.

[0101] Based on the communication module 110 BP , 110 HP Received data, module 120 BP , 120 HP Designed by considering the received electromechanical converter 150 BP , 150 HP The power P exchanged by another electromechanical converter in BP 、P HP The evaluation value P BP °, P HP °, to adjust the electromechanical converter 150 BP , 150 HP Exchange power P BP 、P HP To comply with the received allocation setting S. For example, module 120 BP , 120 HP Designed to control the electromechanical converter 150 BP , 150 HP The exchange setting value G BP *、G HP *, in order to comply with the assigned setpoint S. To this end, module 120 BP, 120 HP Designed to be, for example, in the voltage control module 130 BP , 130 HP Neutral voltage setting value V DC *Apply voltage correction value δV BP , δV HP Therefore, the exchange setting value G BP *、G HP * By voltage control module 130 BP , 130 HP Based on the voltage correction value δV BP , δV HP Corrected voltage setting value V DC *To determine the voltage correction value δV BP , δV HP Enables modification of the exchange setting value G BP *、G HP *, and thus modify the exchanged power P BP 、P HP .

[0102] In this way, by the electromechanical converter 150 BP , 150 HP The control of the bus voltage V DC The controls can be performed independently of each other while ensuring that the power distribution follows the set value S.

[0103] Module 110 BP , 110 HP , 120 BP , 120 HP Voltage control module 125 BP , 125 HP Therefore, independent of the module 120 BP , 120 HP The power distribution control is implemented to define the voltage set value V DC *. For example, the voltage setting value V DC *By excluding computer CL HP , CL BP Computers other than those provided.

[0104] Still refer to Figure 1 , the device 100 may include a low voltage electromechanical converter 150 BP and high voltage electromechanical converter 150 HP Associated independent local computer CL BP , CL HP .

[0105] Therefore, each local computer CL BP , CLHP At least the associated electromechanical converter 150 is implemented BP , 150 HP Voltage control module 130 BP , 130 HP and control module 140 BP , 140 HP This enables the use of a reduced number of computers. Each local computer CL BP , CL HP An associated electromechanical converter 150 may also be implemented BP , 150 HP Communication module 110 BP , 110 HP and Module 120 BP , 120 HP .

[0106] The device 100 further comprises, for example, a central computer 106 which is designed to send a signal to each communication module 110. HP , 110 BP A distribution setpoint S is provided.

[0107] The central computer 106 is designed to determine the distribution setpoint S, for example, based on the operating point of the turbine 102 (e.g., measured and / or estimated based on other measurements). For example, but not limited to, the operating point may include one or more of the following: fuel inlet flow rate and / or air inlet flow rate, the rotational speed of the BP body 104, the rotational speed of the HP body 103, the air inlet temperature and / or the fuel inlet temperature and / or the exhaust gas temperature leaving the combustion chamber.

[0108] Alternatively, module 110 BP , 120 BP , 110 HP , 120 HP It can be implemented in the central computer 106 instead of the local computer CL HP , CL BP is implemented in .

[0109] The following description will elaborate on the exchange setting value G BP *、G HP * is the switching power setting value P BP *、P HP * and the exchange power P BP 、P HP The evaluation value P BP °, P HP ° is also the switching power setting value P BP *、P HP * Implementation examples for specific cases.

[0110] Figure 2 Shown in this particular case Figure 1 Propulsion system 98.

[0111] refer to Figure 3 , module 120 HP Including block 200 HP , block 200 HP For the distribution of the set value S and the power to be exchanged according to the set value P BP *(as the exchanged power P BP The evaluation value P BP °) Calculate the expected set value P of the power to be exchanged HP **, to comply with the assigned setpoint S.

[0112] For example, in the so-called proportional distribution mode, the distribution setting value S can be at the exchanged power P BP 、P HP In this case, block 200 HP It is designed to set the power to be exchanged by BP *Multiply or divide by the allocated setpoint S to determine the desired setpoint P for the power to be exchanged HP ** :P HP **=P BP * × S (when S = P HP / P BP Hours) or P HP **=P BP * / S(when S=P BP / P HP hour).

[0113] Alternatively, the ratio may be between the exchanged power P BP 、P HP One of the exchanged power P BP 、P HP Therefore, the ratio S is in the range of [0, 1]. In this case, the block 200 HP Will exchange the set value P BP * and P HP *(as the exchanged power P BP 、P HP The evaluation value P BP °, P BP °) is multiplied by the distribution setting value S to calculate the expected setting value P of the power to be exchanged HP ** :P HP **=S×(P BP *+P HP *).

[0114] In the so-called differential distribution mode, the distribution setting value S can be in the exchanged power P BP 、P HP In this case, block 200 HP It is designed to be able to convert the distribution setting value S into the exchange power setting value P BP *(as the exchanged power P BP The evaluation value P BP °) is added or subtracted to determine the expected exchange power setting value P HP ** :P HP **=P BP *+S(when S=P HP -P BP Hours) or P HP **=P BP *-S(when S=P BP -P HP hour).

[0115] It may be interesting to see how the allocation pattern changes over time. Therefore, in order to know the allocation pattern and therefore the meaning of the received allocation setting value S, each communication module 110 BP , 110 HP It may also be designed to receive an allocation mode indication that identifies an allocation mode from among several predetermined allocation modes including at least one of the proportional mode and the differential mode presented above, for example.

[0116] In this way, block 200 HP Designed to determine the desired power setting value P to be exchanged HP ** Consider the allocation mode indication. For example, module 120 BP , 120 HP It is designed to select the formula associated with the indicated distribution mode, which is based on the distribution setpoint S and the power setpoint P to be exchanged on the other side. BP *(as the power P exchanged on the other side BP The expected power setting value P to be exchanged is given by HP **. For example, the proportional allocation mode is the same as the formula P HP **=P BP * × S (when S = P HP / P BP Hours) or P HP **=P BP / S(when S=P BP / P HP Hours) or P HP **=S×(P BP *+P HP *)(When S=P HP / (PBP +P HP ) is associated with the formula P HP **=P BP *+S(when S=P HP -P BP Hours) or P HP **=P BP *-S(when S=P BP -P HP When) associated.

[0117] Module 120 HP Also includes a comparator 201 HP and corrector 202 HP , comparator 201 HP Designed to calculate the desired power setting value P to be exchanged HP **With the power setting value P to be exchanged HP *The error between εP HP *, Corrector 202 HP Designed according to the error εP HP *To calculate the voltage correction value δV HP Preferably, the corrector 202 HP With zero static error. For example, the corrector 202 HP It is of the proportional-integral (PI) type or the proportional-integral-derivative (PID) type. The use of a corrector makes it possible to avoid the problems associated with the use of resistance values ​​in the patent application JP 2014 131469A discussed above.

[0118] In a similar way, refer to Figure 4 , module 120 BP Including block 200 BP , Comparator 201 BP and corrector 202 BP , block 200 BP For the distribution of set value S and the power setting value P to be exchanged HP *(as the power P exchanged on the other side HP The evaluation value P HP °) Calculate the expected power setting value P to be exchanged BP **, comparator 201 BP Designed to calculate the desired power setting value P to be exchanged BP **With the power setting value P to be exchanged BP *The error between εP BP *, Corrector 202 BP Designed according to the error εPBP *To calculate the voltage correction value δV BP .

[0119] refer to Figure 5 , setting value determination module 130 HP Comparator 300 included HP , comparator 300 HP Designed to calculate the voltage correction value δV HP Corrected voltage setting value V DC *With bus voltage V DC The difference between ΔV DC，HP :ΔV DC，HP =V DC *-δV HP -V DC .

[0120] Comparator 300 HP It can also be configured to calculate the voltage correction value δV HP Corrected voltage setting value V DC *The square of the bus voltage V DC The difference between the squares of ΔV 2 DC，HP :ΔV 2 DC，HP =(V DC *-δV HP ) 2 -V 2 DC .

[0121] Setting value determination module 130 HP Also includes a corrector 301 HP , Corrector 301 HP Designed according to the difference V DC，HP or ΔV 2 DC，HP To determine the power setting value P to be exchanged HP *. Preferably, the corrector 301 HP With zero static error. For example, the corrector 301 HP It is a PI (proportional integral) type or a PID (proportional integral differential) type.

[0122] Similarly, reference Figure 6 , setting value determination module 130 BP Comparator 300 included BP and Corrector 301 BP .

[0123] Local computer CL BP , CL HPThe presence of a zero static error corrector in the can result in a difference in power distribution, where one of the electromechanical converters BP or HP takes all the power. To control the power distribution between the electromechanical converters BP and HP, the central computer 106 sends a command to the electromechanical converter 150. BP , 150 HP The local computer CL BP and CL HP Send the assigned set value. Each electromechanical converter 150 BP , 150 HP Knowing its power and the power of the other electromechanical converter, the powers can then be balanced.

[0124] In order to stabilize the power exchange of the device 100, each communication module 110 BP , 110 HP It is also designed to realize slow communication at a frequency of less than 1 kHz and preferably about 1 kHz, for example and in a non-limiting manner, so that the local computers CL communicating with each other BP , CL HP The balanced loop formed has a larger BP , CL HP and the corresponding electromechanical converter forms a voltage control loop with a slower bandwidth.

[0125] Communication module 110 BP , 110 HP It is also designed to be used between the central computer 106 and the local computer CL BP , CL HP Slow communication is achieved between the two devices, for example and in a non-limiting manner, at a frequency of less than 1 kHz and preferably at a frequency of approximately 1 kHz.

[0126] Therefore, the device 100 is designed to be able to operate under a single balancing law that works on both (power and voltage balance), which ensures that the central computer 106 and the local computer CL BP , CL HP Loss of communication between the local computer CL and / or BP , CL HP Redundancy in case of loss of communication between them.

[0127] refer to Figure 7 , control module 140 HP Including, for example, block 400 HP , block 400 HP Designed to determine the electromechanical converter 150 HP The set value of at least one current, which current or currents define the exchanged power P HP For example, the phase currents I of the three phases A, B and C of the motor areA，HP , I B，HP , I C，HP , represented by the direct current and the quadrature current in a rotating reference frame equipped with a direct axis and a quadrature axis. For example, block 400 HP Designed to determine the DC current setting value I D，HP * and the quadrature current setting value I Q，HP *. For example, the determination is based on the angular position θ of the rotor of the motor HP and speed ω HP and the bus voltage V DC conduct.

[0128] In particular, the angular position θ of the motor's rotor HP and speed ω HP This enables the representation of electrical quantities, such as phase currents I, in a rotating reference frame. A，HP , I B，HP , I C，HP . Bus voltage V DC For phase current I A，HP , I B，HP , I C，HP Modulate, or use the de-fluxing method to determine the DC current setpoint I D，HP *.

[0129] Control module 140 HP It also includes, for example, a current control block 401 HP , current control block 401 HP Designed to be based on one or more current setpoints I D，HP *、I Q，HP * and the current or currents (e.g. phase current I A，HP , I B，HP , I C，HP ) measured value, to the high voltage electromechanical converter 150 HP Provides commands. For example, the control is pulse width modulation control PWM HP .

[0130] Similarly, reference Figure 8 , control module 140 BP Including, for example, block 400 BP , block 400 BP Designed to determine the low voltage electromechanical converter 150 BP The set value of at least one current, which current or currents define the exchanged power P BP For example, these currents are the phase currents I of the three phases A, B and C of the motor. A，BP , I B，BP , I C，BP , which is expressed as a direct current and a quadrature current. Block 400 BPDesigned to determine the DC current setting value I D，BP * and the quadrature current setting value I Q，BP *. For example, the determination is based on the angular position θ of the rotor of the motor BP and speed ω BP and the bus voltage V DC conduct.

[0131] Control module 140 BP It also includes, for example, a current control block 401 BP , current control block 401 BP Designed to be based on one or more current setpoints I D，BP *、I Q，BP * and the current or currents (e.g. phase current I A，BP , I B，BP , I C，BP ) measured value, to the low voltage electromechanical converter 150 BP Provides commands. For example, the control is pulse width modulation control PWM BP .

[0132] refer to Figure 9 The device 100 may further optionally include a selection module 170 for the low-pressure side and / or the high-pressure side. BP , 170 HP , select module 170 BP , 170 HP Designed to receive the so-called direct exchange setpoint G′ directly from the central computer 106, for example BP , G' HP , and optionally directly exchange the setpoint G' BP , G' HP Provided to the control module 140 BP , 140 HP , instead of receiving the BP , 120 HP Provided exchange setting value G BP *、G HP *. In this way, the electromechanical converter 150 mentioned BP , 150 HP The exchanged power is directly determined by the direct exchange set value G' BP , G' HP control.

[0133] exist Figure 9 In the example shown, only the selection module 170 is activated. HP .

[0134] In the selection module 170 HP , 170 BPThe activated side no longer controls the bus voltage. In this case, the bus voltage V DC .

[0135] Figure 10 In the exchange setting value G BP *、G HP * is the switching power setting value P BP *、P HP * and the exchange power P BP 、P HP The evaluation value P BP °, P HP ° is also the switching power setting value P BP *、P HP * Repeat under specific circumstances Figure 9 .

[0136] In this case, module 170 BP , 170 HP Receive the power setting value P' to be exchanged BP or P' HP .

[0137] Directly provide power exchange set value P' BP or P' HP Without having to calculate the voltage correction value, it is possible to define the power exchange in operating phases where the definition of the power distribution set value S is not appropriate (for example when the power exchange on one side is fixed and the exchange on the other side is arbitrary). In addition, the power set value P' to be exchanged BP or P' HP The direct provision of enables the setpoint to be applied more quickly, which is useful, for example, in assistance situations.

[0138] Figure 11 and Figure 12 Shown in Figure 1 The module 120 is shown as a general HP , 120 BP Therefore, in this example, module 200 BP , 200 HP Designed to be based on the distribution setting value S, the power P exchanged on the other side BP 、P HP The evaluation value P BP °, P HP ° and the power P exchanged on the mentioned side BP 、P HP The evaluation value P BP °, P HP ° (if necessary) to calculate the desired power exchange setpoint P BP **、P HP**. Then, module 120 HP , 120 BP Also includes module 1100 BP , 1100 HP , module 1100 BP , 1100 HP Designed according to the desired set value P of the power to be exchanged BP **、P HP **To calculate the expected exchange setting value G BP **、G HP **. Then, comparator 201 BP 、201 HP Designed to calculate the desired exchange setting value G BP **、G HP **Exchange setting value G BP *、G HP *The error between the calibrator 202 BP , 202 HP (Preferably, always with zero static error) is designed to calculate the voltage correction value δV based on the error BP , δV HP .

[0139] refer to Figure 13 In other embodiments, the setting value P HP *、P BP *Error εP HP *、εP BP The control of these errors εP HP *、εP BP *The difference of the control is replaced.

[0140] When there is a transient change on the bus (change in electrical load), the bus voltage V DC However, by controlling the error εP HP *、εP BP *, it is possible to request a power change in the same direction on both the HP side and the BP side (e.g. increase the supplied power), but the allocation remains constant. This means that the bus voltage can be kept constant for a long time with the desired set value V DC * Different levels. Instead, by controlling the error εP HP *、εP BP * to avoid this undesirable side effect.

[0141] Therefore, the comparator 201 HP The comparator 1302 HP Instead, comparator 1302 HP Designed to calculate the error εP HP *、εPBP *The following difference between ΔεP HP *:ΔεP HP *=εP HP *-εP BP *=(P HP **-P HP *)-(P BP **-P BP *). Similarly, comparator 201 BP The comparator 1302 BP Instead, comparator 1302 BP Designed to calculate the error εP HP *、εP BP *The following difference between ΔεP BP *:ΔεP BP *=εP BP *-εP HP *=(P BP **-P BP *)-(P HP **-P HP *).

[0142] Figure 14 Shown in Figure 1 The module 120 shown in the general case HP , 120 BP A possible implementation of , where ΔεG HP * and ΔεG BP * is the error εG HP *、εG BP *The difference between the following values: ΔεG HP *=εG HP *-εG BP *=(G HP **-G HP *)-(G BP **-G BP *), and ΔεG BP *=εG BP *-εG HP *=(G BP **-G BP *)-(G HP **-G HP *).

[0143] For example, through the communication module 100 HP , 110 BP To exchange the expected setting value G HP **、G BP **.

[0144] In summary, it should be noted that the present invention is not limited to the embodiments described above. In fact, it will be apparent to those skilled in the art that various modifications may be made to the embodiments described above based on the teachings just disclosed.

[0145] In the foregoing detailed description of the invention, the terms used should not be construed to limit the invention to the embodiments set forth in this specification, but should be construed to include all equivalents that are contemplated to the extent achievable by a person skilled in the art by applying his or her common knowledge to the implementation of the just disclosed teachings.

Claims

1. A power exchange device (100) for use in an aircraft, comprising: - a voltage bus (160) designed to present a bus voltage (V DC ); -Low voltage (BP) electromechanical converter (150 BP ), the low-voltage electromechanical converter being designed to exchange power (P) between the voltage bus (160) and the low-voltage body (104) of the turbine (102) of the aircraft BP ); -High Voltage (HP) Electromechanical Converter (150 HP ), the high-voltage electromechanical converter being designed to exchange power (P) between the voltage bus (160) and the high-voltage body (103) of the turbine (102) of the aircraft HP );as well as - For each electromechanical converter (150 BP , 150 HP ) voltage control module (125 BP , 125 HP ), the voltage control module is designed to control the electromechanical converter (150 BP , 150 HP ) to control the bus voltage (V DC ) to regulate the electromechanical converter (150 BP , 150 HP )Exchange power (P HP , P BP ); Characterized in that the device further comprises: - a computer (106) designed to operate at the exchanged power (P HP , P BP ) provide a distribution setting value (S) between the two, the distribution setting value (S) varying with time; and - for the electromechanical converter (150 BP , 150 HP ) of at least one electromechanical converter: -Communication module (110 BP , 110 HP ), the communication module is designed to receive the distribution setting value (S) provided by the computer (106) and the electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in BP , P HP )'s evaluation value (P BP °, P HP °), and - a module (120) for complying with said assigned setpoint (S) BP , 120 HP ), the module is designed to take into account the received electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in BP , P HP )'s evaluation value (P BP °, P HP °), to adjust the electromechanical converter (150 BP , 150 HP )Exchange power (P HP , P BP ) to comply with the received allocation setting value (S).

2. The power exchange device (100) according to claim 1, wherein: The module (120) for complying with the assigned setpoint (S) BP , 120 HP ) is designed to modify the voltage setting value (V DC *) to regulate the electromechanical converter (150 BP , 150 HP )Exchange power (P BP , P HP ), so that the electromechanical converter (150 BP , 150 HP ) voltage control module (125 BP , 125 HP ) will be the bus voltage (V DC ) is controlled to the modified bus voltage.

3. The power exchange device (100) according to claim 2, wherein: The module (120) for complying with the assigned setpoint (S) BP , 120 HP ) is designed to be in the voltage control module (125 BP , 125 HP ) to the voltage setting value (V DC *)Apply voltage correction value (δV BP , δV HP ).

4. The power exchange device (100) according to any one of claims 1 to 3, wherein: Each voltage control module (125 HP , 125 BP )include: -Setting value determination module (130 HP , 130 BP ), the set value determination module is designed to determine the electromechanical converter (150 BP , 150 HP ) of the exchange setting value (G BP *, G HP *);as well as -Control module (140 BP , 140 HP ), the control module is designed to control the electromechanical converter (150 BP , 150 HP ), so that the electromechanical converter (150 BP , 150 HP ) follow the exchange setting value (G BP *, G HP *).

5. The power exchange device (100) according to claim 4, wherein: The exchange setting value (G BP *, G HP *) is to be used in the electromechanical converter (150 BP , 150 HP ) and the power setting value (P BP *, P HP *).

6. The power exchange device (100) according to claim 4, wherein: The exchange setting value (G BP *, G HP *) is to be used in the electromechanical converter (150 BP , 150 HP ) and the voltage bus (160), or alternatively, the electromechanical converter (150 BP , 150 HP ) each comprising a motor coupled to an associated body (103, 104), the exchange setpoint (G BP *, G HP *) is the torque setting value of the motor.

7. The power exchange device (100) according to any one of claims 4 to 6, wherein: The module (120) for complying with the assigned setpoint (S) BP , 120 HP ) is designed for: - by considering the received electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in BP , P HP )'s evaluation value (P BP °, P HP °), to determine the desired exchange setting value (G BP **, G HP **) to comply with the received allocation setting value (S); as well as - The electromechanical converter (150 BP , 150 HP ) of the exchange setting value (G BP *, G HP *) is controlled to the desired exchange setting value (G BP **, G HP **).

8. The power exchange device (100) according to claims 3 and 7, wherein: The module (120) for complying with the assigned setpoint (S) BP , 120 HP )include: -Comparator(201 BP , 201 HP ), the comparator is designed to calculate the desired exchange setting value (G BP **, G HP **) with the exchange setting value (G BP *, G HP *); and -Correction (202 BP , 202 HP ), the corrector is designed to calculate the voltage correction value (δV BP , δV HP ).

9. The power exchange device (100) according to any one of claims 4 to 6, wherein: The module (120) for complying with the assigned setpoint (S) BP , 120 HP ) is designed by taking into account the received electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in BP , P HP )'s evaluation value (P BP °, P HP °), to determine the desired exchange setting value (G BP **, G HP **) to comply with the received allocation setting value (S), and the module (120) for complying with the allocation setting value (S) BP , 120 HP )include: -Comparator(1302 BP , 1302 HP ), the comparator is designed to calculate the desired switching setting value (G BP **, G HP **) with the mentioned electromechanical converter (150 BP , 150 HP ) of the exchange setting value (G BP *, G HP *)The error between (εG BP *, εG HP *) and the desired exchange setting value (G BP **, G HP **) with another electromechanical converter (150 BP , 150 HP ) of the exchange setting value (G BP *, G HP *)The error between (εG HP *, εG BP *) the difference between (ΔεG BP *, ΔεG HP *);as well as -Correction (202 BP , 202 HP ), the corrector is designed to be based on the difference (ΔεG BP *, ΔεG HP *) to calculate the voltage correction value (δV BP , δV HP ).

10. The power exchange device (100) according to claim 8 or 9, wherein: The corrector (202 BP , 202 HP ) has zero static error.

11. The power exchange device (100) according to any one of claims 7 to 10, wherein: The communication module (110 BP , 110 HP ) is further designed to receive an indication of a dispensing mode from a plurality of predetermined dispensing modes, and wherein said module (120) for complying with said dispensing setpoint (S) BP , 120 HP ) is further configured to determine the desired exchange setting value (G) based on the received allocation mode indication BP **, G HP **).

12. The power exchange device (100) according to claim 11, wherein: The predetermined allocation mode includes at least one of the following: - Proportional distribution mode, in which the received power distribution setting value (S) is the exchanged power (P BP , P HP ), and wherein the module (120) for complying with the distribution setpoint (S) BP , 120 HP ) is designed to convert the received evaluation value (P BP °, P HP °) is multiplied or divided by the assigned set point (S) to determine the desired exchange set point (G BP **, G HP **);as well as - Differential allocation mode, in which the received power allocation setting (S) is the exchanged power (P BP , P HP ), and wherein the module (120) for complying with the assigned set point (S) BP , 120 HP ) is designed to convert the received evaluation value (P BP °, P HP °) is added to the assigned set value (S) or by adding the received evaluation value (P BP °, P HP °) is subtracted from the assigned setting value (S) to determine the expected exchange setting value (G BP **, G HP **).

13. The power exchange device (100) according to any one of claims 4 to 12, further comprising a selection module (170 BP , 170 HP ), the selection module is designed to send the electromechanical converter (150) to the mentioned electromechanical converter (150) according to the command. BP , 150 HP ) control module (140 BP , 140 HP ) provides the so-called direct exchange setting value (G' BP , G' HP ), instead of supplying the exchange setting value (G BP *, G HP *), so that the electromechanical converter (150 BP , 150 HP )Exchange power (P BP , P HP ) is controlled to the direct exchange set value (G' BP , G' HP ).

14. The power exchange device (100) according to any one of claims 4 to 13, wherein: The exchange setting value (G BP *, G HP *) is the power setting value to be exchanged (P BP *, P HP *).

15. The power exchange device (100) according to claim 14, wherein: By the electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in BP , P HP )'s evaluation value (P BP °, P HP °) is the electromechanical converter (150 BP , 150 HP ) is the power setting value (P BP *, P HP *).

16. The power exchange device (100) according to any one of claims 1 to 15, wherein: By the electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in BP , P HP )'s evaluation value (P BP °, P HP °) is formed by the electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in HP , P BP )’s measured value.

17. A propulsion system (98) for an aircraft, the propulsion system comprising a turbine (102) and a device (100) according to any one of claims 1 to 16.

18. An aircraft comprising a propulsion system (98) according to claim 17.

19. A method for exchanging power in an aircraft, characterized in that The method comprises: - For low voltage (BP) electromechanical converters (150 BP ) and high voltage (HP) electromechanical converters (150 HP ) in each of the low voltage electromechanical converters (150 BP ) is designed to exchange power (P) between a voltage bus (160) and a low-pressure body (104) of a turbine (102) of said aircraft BP ), the voltage bus is designed to present a bus voltage (V DC ), the high voltage electromechanical converter (150 HP ) is designed to exchange power (P) between the voltage bus (160) and the high-voltage body (103) of the turbine (102) of the aircraft HP ): By controlling the electromechanical converter (150 BP , 150 HP ) to control the bus voltage (V DC ) to regulate the exchanged power (P BP , P HP ); - by means of a computer (106) in the exchanged power (P HP , P BP ) provide a distribution setting value (S) between the two, the distribution setting value (S) varying with time; and - For the electromechanical converter (150 BP , 150 HP ) in at least one electromechanical converter: - receiving the distribution setting value (S) provided by the computer (106) and evaluating (P BP °, P HP °) by the electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in BP , P HP ),as well as - by considering the received electromechanical converter (150 BP , 150 HP ) is the power exchanged by another electromechanical converter in BP , P HP )'s evaluation value (P BP °, P HP °), to adjust the electromechanical converter (150 BP , 150 HP )Exchange power (P HP , P BP ) to comply with the received allocation setting value (S).

20. A computer program capable of being downloaded from a communication network and / or recorded on a computer-readable medium, characterized in that The computer program comprises instructions for executing the steps of the method for exchanging power in an aircraft according to the preceding claim, when said program is run on a computer.

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