EP3732778A1 - Procédé de commande électronique d'un moteur - Google Patents
Procédé de commande électronique d'un moteurInfo
- Publication number
- EP3732778A1 EP3732778A1 EP18825737.2A EP18825737A EP3732778A1 EP 3732778 A1 EP3732778 A1 EP 3732778A1 EP 18825737 A EP18825737 A EP 18825737A EP 3732778 A1 EP3732778 A1 EP 3732778A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- frequency
- electrical signal
- signal
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems, e.g. audible personal calling systems
- G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/16—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves
- A01M29/18—Scaring or repelling devices, e.g. bird-scaring apparatus using sound waves using ultrasonic signals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
- B06B1/0223—Driving circuits for generating signals continuous in time
- B06B1/0269—Driving circuits for generating signals continuous in time for generating multiple frequencies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/0004—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P31/00—Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00
Definitions
- the invention relates to a method for controlling the power supply of an engine.
- the invention also relates to a device for electronically controlling the power supply of an engine.
- the invention further relates to an actuator.
- the invention also relates to an actuator system.
- the invention also relates to a computer program product.
- the invention finally relates to a data recording medium.
- the perception of information by users is usually visual or sound.
- the visual information is for example displayed using a screen or indicator lights or projection means.
- the sound information is for example emitted using a loudspeaker, a piezoelectric element or a buzzer.
- This information may have been transmitted by a material means (cable) or immaterial (radio wave, RFID, optical) by means of visualization or sound emission.
- This information therefore requires additional technical means dedicated to the transmission and / or visualization of information.
- the object of the invention is to provide a control method of an electric motor to overcome the disadvantages mentioned and improving the control methods known from the prior art.
- the invention provides a method of controlling an electric motor for transmitting information from the engine, in particular to the attention of a user and / or a third party.
- the method for electronically controlling the power supply of a polyphase motor comprises a supply of at least one phase of the motor with a first periodic or pseudo-periodic electrical signal suitable for the electric motor and / or a structure related to the engine emits a first sound signal, the power supply occurring while a motor rotor is kept stopped relative to a stator of the engine.
- the method may comprise a definition of a first frequency of a first portion of the first electrical signal as a function of a first portion of the first sound signal to be emitted by the engine and / or the structure and an engine supply with the first portion. from the first electrical signal to the first defined frequency.
- the method may comprise a definition of a second frequency of a second portion of the first electrical signal as a function of a second portion of the first sound signal to be emitted by the engine and / or the structure and an engine power supply with the second portion. from the first electrical signal to the second defined frequency.
- the method may comprise the definition of a plurality of different electrical signals suitable for the motor and / or the structure to emit several sound signals without the motor rotor rotating relative to a stator of the motor, each sound signal being associated with information particular for a user, including:
- the method may comprise the definition of an electrical signal allowing the emission, by the engine and / or the structure, of an animal repelling sound signal without the engine rotor rotating relative to the engine stator, in particular an ultrasonic sound signal.
- the method may comprise the definition of an electrical signal allowing the emission by the motor and / or the structure of an alarm sound signal without the motor rotor rotating relative to the motor stator, in particular an electrical signal enabling a resonance of the electric motor and / or the structure, in particular of a shutter or a blind.
- the method may comprise the definition of the first electrical signal having a frequency progressively evolving over a range of frequencies, in particular a range extending from 500 Hz to 10000 Hz, or even from 1000 Hz to 5000 Hz.
- the method may comprise a configuration phase in which:
- a second electrical signal having a frequency progressively evolving over a range of frequencies ranging from 500 Hz to 10000 Hz, or even from 1000 Hz to 5000 Hz; the motor is powered with the second electrical signal; the user indicates when the engine and / or the structure emits a sound that suits him while the engine is being powered with the second electrical signal;
- the frequency of the second electrical signal corresponding to the moment indicated by the user is recorded as the frequency of the first electrical signal to be used for subsequently transmitting the first sound signal.
- the first electrical signal may be a signal sampled at a frequency greater than or equal to 16kHz, even greater than or equal to 20kHz, even greater than or equal to 40kHz, even greater than or equal to 50kHz, or even approximately 100kHz, or the first electrical signal may be a polyphase signal, each phase of which is fed by a signal sampled at a frequency greater than or equal to 16 kHz, or even greater than or equal to 20kHz, even greater than or equal to 40kHz, even greater than or equal to 50kHz, or even approximately 100kHz.
- the first electrical signal may be a trapezoidal signal or a pseudo-sinusoidal signal or a sinusoidal signal or the first electrical signal may be a three-phase signal of which each phase is trapezoidal or pseudo-sinusoidal or sinusoidal.
- the motor may be a three-phase electric motor and the first power signal may be generated by a three-phase inverter, in particular a three-phase inverter with controlled switches and / or a three-phase inverter with PWM-controlled switches and / or a three-phase inverter with six switches. orders.
- a device for electronically controlling the power supply of an engine in particular an inverter, in particular a three-phase inverter with controlled switches and / or a three-phase inverter with PWM-controlled switches and / or a three-phase inverter with six inverters.
- controlled switches comprises hardware and / or software elements implementing the method defined above, in particular hardware and / or software elements designed to implement the method defined above, and / or the device comprising means for implementing the previously defined method.
- an actuator comprises a mechanical structure comprising a resonant element at a given frequency, in particular a frequency between 500 Hz to 10000 Hz, or even between 1000 Hz to 5000 Hz.
- an actuator system comprises a previously defined electronic control device and an actuator, in particular a three-phase electric motor and / or an actuator defined above.
- the invention also relates to a computer program product downloadable from a communication network and / or recorded on a data carrier readable by a computer and / or executable by a computer, comprising instructions for implementing computer program code.
- a computer program product downloadable from a communication network and / or recorded on a data carrier readable by a computer and / or executable by a computer, comprising instructions for implementing computer program code.
- the invention also relates to a data storage medium, readable by a computer, on which is recorded a computer program comprising program code instructions implementing the previously defined method or a readable recording medium by computer comprising instructions which, when executed by a computer, lead it to implement the method defined above.
- Figure 1 is a longitudinal section of an engine embodiment.
- Figure 2 is a cross section of the motor embodiment.
- Figure 3 is an electrical diagram of a first embodiment of motor powered by an inverter.
- Figure 4 is a diagram of a home automation system including the motor embodiment.
- Figure 5 is a flowchart of an embodiment of a control method.
- Figure 6 is a timing diagram of a first example of inverter control and power signals of a three-phase motor.
- Figure 7 is a timing chart of a second example of inverter control and power signals of a three-phase motor.
- FIG. 8 is an example of power signals of a three-phase motor, the motor being powered to turn in a first mode, then fed in a second mode, then powered to emit a sound (without turning) in a third mode .
- Figure 9 is a timing diagram of the intensity of a power supply of a motor whose power supply voltage varies between 500Hz and 5000Hz over a period of one second.
- Fig. 10 is a timing diagram of a motor supply signal and a sound signal produced as a result of this supply signal.
- Figure 11 is a stall characteristic diagram of an engine.
- Figure 12 is a circuit diagram of a second embodiment of a motor powered by an inverter.
- Figure 13 is a circuit diagram of a third embodiment of motor powered by an inverter.
- the installation comprises an actuator system 5 and a movable element 3, 4.
- the actuator system 5 comprises an electronic control device 1, in particular an inverter, and an actuator 16 of the electric motor type.
- the electronic control method of the invention applies to electronically controlled polyphase motors.
- a motor is constituted by a stator, by fixed definition, on which is made a coil of copper wire, and a rotor, by definition movable relative to the stator.
- the rotor can also be wound, or be equipped with magnets, or even made of ferromagnetic sheets.
- the geometry of the assembly may be variable: the stator may surround the rotor (the most common case, it is called a centered rotor), or the rotor may be around the stator (we speak of rotor bell or outer rotor), or well still both elements can face each other.
- the power supply of the stator windings generates a magnetic field that allows the rotor to move.
- the motor is preferably of the brushless magnet type or wound rotor or permanent magnet synchronous-reluctant type. It can also be an alternator-starter.
- the motor can also be an asynchronous motor or a synchro-reluctant motor.
- the electronic control method applies to polyphase motors irrespective of the phase connection configuration, such as, for example, motors with triangular or star-connected coils or two-phase motors.
- the electric motor 16 is for example polyphase type (or BLDC motor, according to the acronym for "BrushLess Direct Current").
- the motor 16 comprises a rotor 13 including a rotor body 31 provided with magnetic elements 32 and a stator 14.
- the stator surrounds the magnetic elements 32 of the rotor.
- the rotor is rotatably mounted in the stator about an axis X.
- the rotor is for example guided in the bearing by bearings 26 and 27.
- the magnetic elements 32 are arranged on the outer circumference of the rotor body 31.
- the magnetic elements 32 of the rotor 13 are, for example, ferrite permanent magnets.
- the magnetic elements 32 are separated from the stator 14 by an air gap 25, radial with respect to the axis of rotation X.
- the magnetic elements or permanent magnets 32 may be attached to the outer circumference of the rotor body 13 by gluing, overmolding or any other known technique.
- the rotor body 31 is integrally connected in rotation to a rotor shaft 24.
- the rotor shaft 24 is centered on the axis of rotation X and protrudes on either side of the rotor body 31.
- the rotor body 31 is formed from a stack of sheets.
- the rotor body 31 is made of a solid shaft.
- the rotor body 31 is in the form of a bell-shaped bell.
- the stator 14 is formed by a stator core 41 of magnetizable material, more specifically ferromagnetic material, which is generally formed by a stack, or package, of sheets and provided with insulating fittings.
- the stator core 41 comprises polar elements 28 distributed on a peripheral wall 30 of the stator core 41, preferentially on the inside of the peripheral wall 30 of the stator core 41.
- the stator 14 is obtained from a stator core 41 comprising a stack of laminations each forming a closed circumference, on which a winding assembly is attached.
- a single coil 29 is shown in place around a single polar element 28, for the sake of clarity.
- the polar elements 28 of the core 41 project inwardly from the electric motor 16, from the peripheral wall 30.
- stator 14 there are six in number, uniformly distributed on the peripheral wall 30, thus forming a stator 14 six poles.
- the space E28 formed between two adjacent polar elements 28 is called notch.
- Windings 29 are positioned in the notches, around the pole elements 28 of the stator 14.
- each pole element 28 is surrounded by a coil 29 which is specific to it. It is nevertheless possible to have only a partial winding such as a winding on a pole element out of two. These coils 29 are such that they have the same number of turns per polar element.
- the coils 29 of diametrically opposed polar elements are connected at the ends of the stator core 14 to form a phase.
- the stator 14 thus comprises three phases, forming in particular a triangle configuration.
- the coils 29 are connected so that, when traversed by a current, they produce a rotating magnetic field which rotates the rotor 13.
- the coils 29 are electrically isolated from the stator core 41 by an insulating element.
- the pole elements 28 of the stator core 41 comprise, at the end of a tooth 28a projecting from the peripheral wall 30 of the stator 14, a step 28b in the stack of laminations forming the stator core.
- the electronic control method uses any type of control electronics for generating a magnetic field in a wound stator.
- the control may for example comprise trapezoidal or sinusoidal type or pseudo-sinusoidal type supply signals.
- the electronic control device 1 comprises a plurality of output terminals U, V, W configured to be electrically connected to a plurality of input terminals of the polyphase motor 16.
- the control device electronics 1 comprises three output terminals intended to be electrically connected to three input terminals of the three-phase electric motor.
- the electric motor 16 may be a two-phase electric motor or any other type of polyphase electric motor comprising a greater number of phases.
- the electronic control device 1 is a polyphase inverter configured to deliver, sequentially, electrical signals between two output terminals of the plurality of output terminals.
- the inverter comprises a plurality of branches B1, B2, B3 electrically connected in parallel between a first connection point C1 and a second connection point C2.
- Each branch B1, B2, B3 comprises a first electronic switch K1, K2, K3 electrically connected to the first connection point C1 and electrically connected in series with a second associated electronic switch K4, K5, K6.
- the second electronic switch is connected electrically at the second connection point C2. The simultaneous switching of a first electronic switch and a second electronic switch other than its associated electronic switch makes it possible to supply at least one winding 29U, 29V, 29W of the motor.
- Electronic switches K1 to K6 or controlled switches are preferably transistors.
- the inverter shown is a three-phase inverter and the motor is a three-phase electric motor whose 29U, 29V, 29W are electrically connected in a triangle assembly.
- This mounting example is in no way limiting.
- the windings of the motor 16 may be electrically connected in a star arrangement.
- a first connection point C1 of the inverter is electrically connected to a first + V terminal of an electrical power supply source and a second connection point C2 is electrically connected to a second terminal Gnd of the power supply , especially via a current sensor.
- Each branch B1, B2, B3 of the inverter comprises a midpoint electrically connected to an output terminal.
- the first electronic switches K1, K2, K3 are distributed in a first group of switches and the second electronic switches K4, K5, K6 are distributed in a second group of switches.
- the switching of the electronic switches K1, K2, K3, K4, K5, K6 is controlled by control signals generated by the control unit.
- control 7 forming a predetermined control law.
- the control law is broken down into a succession of switching sequences, each sequence corresponding to a set of signals during a determined period of time.
- the control law is programmed so that the inverter sequentially outputs a voltage between two output terminals of the plurality of output terminals of the electronic controller 1.
- the electrical signals delivered by the inverter are programmed to sequentially feed the stator windings of the polyphase electric motor to generate a rotating electric field adapted to drive the rotating rotor in normal or nominal operation mode of the engine.
- the control unit may include a microprocessor or a microcontroller.
- This control unit can be programmed or arranged so as to produce a control of the controlled switches at a frequency greater than or equal to 16kHz, even greater than or equal to 20kHz, even greater than or equal to 40kHz, or even greater than 50kHz, or even order of 100 kHz, in particular a command according to a pulse width modulation technique (PWM for Pulse Width Modulation) at a frequency greater than or equal to 16 kHz, or even greater than or equal to 20 kHz, or even greater than or equal to 40 kHz, or even higher at 50kHz, or even of the order of 100kHz.
- PWM pulse width modulation technique
- the first electrical signal is a signal sampled at a a frequency greater than or equal to 16 kHz, even greater than or equal to 20 kHz, even greater than or equal to 40 kHz, or even greater than 50 kHz, or even of the order of 100 kHz, or in that the first electrical signal is a three-phase signal of which each phase is sampled at a frequency greater than or equal to 16kHz, even greater than or equal to 20kHz, even greater than or equal to 40kHz, even greater than 50kHz, or even of the order of 100kHz.
- a control frequency or control switches as high as possible. However, high frequencies pose thermal and economic constraints.
- the number of switches ordered may be different.
- the electronic control device may comprise fewer than six controlled switches or more than six controlled switches, including four controlled switches or eight controlled switches.
- four or eight controlled switches can be used to control a two-phase motor.
- the electronic control device 1, in particular the control unit 7, comprises hardware and / or software elements governing its operation, in particular the hardware and / or software elements comprise all the means making it possible to implement the electronic control method of the invention, in particular the embodiments of the electronic control method described below.
- the hardware and / or software elements may comprise software modules.
- actuator systems 5 relate to actuator systems 5 comprising a two-phase motor including a first winding A and a second winding B.
- a first example comprises an inverter with four controlled switches mounted relative to the windings A and B as illustrated in FIG. 12.
- a second example comprises an inverter with eight controlled switches mounted relative to the windings A and B as illustrated in FIG. 13.
- the method according to the invention proposes to use a polyphase motor of an installation as a means of generating vibrations while maintaining the rotor of the engine stopped.
- the vibrations are transmitted from the engine to a surrounding structure to which the motor is linked.
- the vibrations are radiated as noise by the engine and / or the structure.
- the method therefore allows the emission of airborne noise without the addition of additional physical element or modification of the physical elements of an existing installation.
- the structure includes all the elements directly or indirectly related to the engine and likely to emit an audible sound or not when they are traversed by the vibrations generated by the engine, the engine itself can be counted among the elements of structure radiating noise.
- the invention also relates to a control program or algorithm able to use the motor as a vibration generator without rotating the rotor, which vibrations propagate step by step in the structure of the installation.
- the mentioned structure may comprise the mobile element to be driven, the support 10 on which the engine rests or another exogenous element or attached to the engine or on the support or on the movable element.
- This structure constitutes, with the engine itself, a means of transmitting airborne sound from solid sound. To maximize the noise level, it is envisaged to cause resonances of the structure and / or the motor. They can be determined at conception or during supervised learning.
- the excitation is characterized by spatial wave numbers and frequencies.
- the structure is characterized by eigen modes and eigenfrequencies. In normal operation, that is to say when the engine is powered so that its rotor rotates, it is committed to clearly separate the two to reduce the noise level. On the other hand, in a particular mode of operation where the objective is to maximize noise and vibration, it is possible to tune the excitation and the structure to maximize the response.
- the motor In normal or nominal operation mode of the motor, the motor is autopilot or closed loop controlled, the signals injected into the motor being determined by the position of the rotor in the stator.
- One or more position sensors are used.
- the sensors are physical or virtual. Indeed, virtual sensors may be calculating means for reconstructing a position information of the rotor of the motor relative to the stator from other characteristics of the motor (current for example).
- the electrical supply signal is applied to the motor according to the position of the stator.
- Sensor signals CAPT J, CAPT_V and CAPT_W are represented and determine for example the states of the controlled switches K1 to K6 defining the power supply of the motor.
- the electronic control device advantageously comprises sensors, in particular sensors 8U, 8V and 8W, making it possible to determine the position of the rotor 13 relative to the stator 14.
- sensors in particular sensors 8U, 8V and 8W
- the signals injected into the motor produce a rotating magnetic field in the stator.
- This magnetic field is followed by the rotor which also produces a magnetic field in the case of a rotor equipped with permanent magnets, or which will close the magnetic field lines in the case of a motor without magnet (reluctant synchro for example) ).
- the electrical signal is here provided to minimize the noise emissions produced by the engine and / or the structure surrounding the engine.
- This electronic control method has the effect of producing noise or sound.
- this method is also a method of producing or generating sound.
- This control method causes a particular mode of operation of the engine, different from the nominal or usual operating mode. This particular mode of operation is characterized by vibrations at the motor while the rotor is stationary or does not rotate.
- the first supply signal may be a signal obtained by the addition of several periodic signals having different frequencies (and not necessarily multiples of each other). It follows that it is not always possible to identify a period of the first signal. We can however identify a pseudo-period of this first signal. In this case of supplying the motor with a first signal constituted by the addition of several signals having different frequencies, it is possible to create a sound having several frequencies transmitted simultaneously. It is thus possible to produce several sound notes simultaneously in the same command.
- the method includes generating a magnetic field at the stator whose period or pseudo-period is too small for the rotor to be driven. Indeed, because of the frequency of the supply signal, the rotor fails to hook the fundamental of the magnetic field generated by the power supply or control signal. It follows as previously mentioned vibrations in the engine while the rotor is stationary or kept stopped.
- This frequency depends on the inertia of the rotor, the friction in the bearings, the number of pairs of motor poles and the electrical parameters of the motor (inductance, resistance, force against electromotive, etc ). This frequency is called the frequency of stall. This frequency also depends on the power of the power signal. The frequency finally depends on the resisting torque exerted by the movable element which constitutes a load for the motor.
- An example of a DC characteristic stall curve of a polyphase brusless motor is illustrated by a graph in FIG. As seen above, for a polyphase motor, the stall frequency depends on the power of the power supply signal.
- the graph shows, on the ordinate, the power of the supply signal and on the abscissa, the frequency of the supply signal. For each given power, there is therefore a stall frequency.
- the domain between DC characteristic and a line defined by the maximum power Pmax in Figure 1 1 represents the set of power and frequency pairs for the rotation of the motor rotor.
- the rotor remains stationary. It should be noted that the range of possible parameters of the supply signal is further limited by the maximum power Pmax that the inverter can provide. It is particularly noted that the rotor remains at a standstill, when it is powered with an electrical signal whose parameters are:
- the engine can therefore be kept at a standstill by supplying the motor with a sufficiently high frequency, in particular a frequency higher than the maximum stall frequency fd.
- a safety coefficient for example 5%, to be certain that the motor supply frequency is greater than the maximum stall frequency.
- PWM-controlled switches are used to drive a duty cycle which can be in a wide range, preferably between 10% and 100% (switch closed between 10% and 100% of its time). Whichever frequency one wishes to generate the vibrations, preferably operates at a duty cycle greater than that for creating a limit power supply signal power PO allowing the rotor drive while away from the curve stall by higher frequencies. This mode of operation makes it possible to generate a sound with an acoustic power such that it is clearly perceived by a human ear when it is in an audible frequency range.
- a single-phase DC motor can only emit sounds of low acoustic power because it must be undernourished, that is to say, apply a current lower than its starting current so that it can not overcome the mechanical resistance provided by the load associated with it. Frequency, this starting current value varies little, and therefore the power to the engine to start it will vary little with the frequency. As a result, the power injected into the engine in order to be able to make it emit a sound without it starting is limited to a lower power range than this starting power, hence sounds of low acoustic power.
- the change in load resistance can displace the characteristic curve by limiting the area of the previously mentioned domain.
- An example of displacement is illustrated by the dotted curve CC '. This displacement is due to an increase in mechanical strength.
- the characteristic curve of the vacuum motor there is a decrease in the operating area by shifting the stall curve to the left and the top of the graph.
- the maximum stall frequency fd is preferably defined as the limit frequency at which the motor picks up when it is powered to its maximum or nominal operating power.
- the stall frequency fd is preferably defined as the limit frequency at which the engine stalls when it is powered to the maximum or nominal operating power of the inverter-motor assembly.
- the stall frequency can be modified by modifying the mechanical strength of the load. As indicated in FIG. 11, when the engine is in conditions defining its characteristic CC ', its stall frequency is then fd'.
- the engine can therefore be kept at a standstill by supplying the motor with a sufficiently high frequency, in particular a frequency higher than the maximum stall frequency fd'.
- a safety coefficient for example 5%, to be certain that the motor supply frequency is greater than the maximum stall frequency fd '.
- the method ensures the engine stop by feeding a single phase of the engine.
- the vibratory and acoustic level obtained is then lower.
- stopping the engine can be ensured by feeding all the phases simultaneously so as to create a pulsating field. It is then typically sought to appropriate a wave number of order 0.
- the magnetic field produced in the stator is static but of variable intensity, in particular of periodic intensity.
- the motor can be stopped by creating two opposing rotating fields of the same intensity.
- the method ensures the stopping of the motor by activating a brake, that is to say a locking means of the rotor.
- a brake that is to say a locking means of the rotor.
- the movable element driven by the motor may also be a rotor locking means in a certain operating range of the engine. In other words, for given power characteristics, the motor can idle and not rotate due to the resistance of the load to which it is coupled.
- the control is not enslaved to the latter, whether in position or speed.
- the polyphase motor is said to be controlled in open loop or direct control.
- the method comprises a step 1 of supplying the motor with a first electrical signal capable of causing the electric motor and / or the structure to emit a first sound signal without the Motor rotor rotates relatively to the motor stator.
- This power supply is performed with a first portion of the first signal whose first frequency is for example sufficiently high so that the motor can not rotate.
- This power supply is maintained for a duration t1.
- This supply can nevertheless cause small angular displacements of the rotor relative to the stator. These small movements may not be visible to the naked eye. These movements have in any case an amplitude less than an angle of 5 ° or 10 °.
- the supply also causes deformation of the stator and / or the rotor. All these phenomena cause vibrations at the engine that radiate the environment, possibly via the structure, in the form of sounds.
- the inverter In a phase of powering the motor to rotate it, the inverter is used to generate an electrical signal generating a rotating magnetic field in the stator of the motor when it feeds the stator windings. The rotor then rotates at the rotation frequency determined by the frequency of the electrical signal. In a phase of powering the engine to produce a sound without turning, the inverter is used to generate the first electrical signal thereby generating a magnetic field in the stator of the motor when it feeds the stator windings.
- the frequency of the first electrical signal is for example greater than the frequency of the evoked signal to rotate the motor.
- the rotor, equipped with magnets can not follow the rotation of the rotating magnetic field determined by the frequency of the first electrical signal, in particular because of its inertia and friction. It then occurs the vibration phenomena and sounds explained above. The rotor remains motionless or almost immobile and the frequencies present in the sounds are not related to the rotation of the rotor.
- the motor control method makes it possible to generate forces in the air gap of the motor, which is the location of the conversion of electrical energy into mechanical energy. These efforts propagate by vibration to the structure. These forces are created without causing any noticeable movement of the rotor. It is therefore a question of creating solid noise independent of the movements of the rotor.
- the magnetic forces are proportional to the square of the magnetic field. The latter is the sum of the field generated by the rotor magnets, or by the electromagnet in the case of a wound rotor for example, and the field generated by the stator windings.
- the development of the square shows three terms. The square of the field of the magnets represents a static force and does not intervene in the noise generation.
- the double product of the field of the magnets and the field of the armature is much larger than the square of the field of the coils. It is therefore the magnets, or electromagnets, that give the bulk of the power.
- the double product of magnetic fields causes forces at the same frequencies as the electrical signal.
- the frequency of this electrical signal is much lower than that of the PWM that generates it.
- the relationship between the two Frequencies can typically range from 1/3 to 1/40.
- PWM mode control generates vibrations at the PWM frequency. Their emission is then inaudible for the human ear beyond 20kHz.
- the invention does not exploit the vibrations generated by the PWM which are of a markedly lower intensity than that of the periodic or pseudo-periodic control signal generated by the electronic control device 1 of the power supply.
- the production of vibrations is independent of the position of the rotor relative to the stator or at least the level of the sound volume appears independent of the position of the motor rotor for the human ear. It is therefore possible to produce sounds without worrying about the position of the motor rotor. Moreover, the generation of vibrations and sounds is achieved without a privileged spatial direction.
- the method comprises a step 100 of defining this first frequency f1 of the first portion P1 of the first electrical signal 90.
- This definition is a function of a first portion p1 of the first sound signal 91 to be emitted by the engine and / or the structure.
- the first frequency can be defined as follows. It is assumed that it is desired to transmit a sound having a frequency of 1 kHz or a main frequency of 1 kHz. The controlled switches K1 to K6 are then driven to generate the first electrical signal with the first frequency equal to 1 kHz.
- the method comprises a step 120 of defining a second frequency f2 of a second portion P2 of the first electrical signal 90.
- This definition is a function of a second portion P2 of the first sound signal 91 to be emitted by the engine and / or the structure.
- the second frequency can be defined as follows. It is assumed that it is desired to transmit a sound having a frequency of 5 kHz or a main frequency of 5 kHz. The controlled switches K1 to K6 are then driven to generate the first electrical signal with the second frequency equal to 5 kHz.
- a step 130 the motor is supplied with the second portion P2 of the first electrical signal 90 at the second defined frequency f2.
- This power supply is maintained for a period t2.
- an emission of a first sound signal 91 having a first portion p1, of a first duration t1, emitted at a first frequency f 1, for example 1 kHz, then a second portion p2, of a second duration is obtained.
- the first duration t1 can be worth a few tenths of seconds, even a few seconds and / or the second duration t2 can be worth a few tenths of seconds, even a few seconds.
- the first portion P1 of the first electrical signal is applied to the motor during the first duration t1, then the second portion P2 of the first electrical signal is applied to the motor during the second duration t2.
- first sound signal comprising a first sound portion, then a second sound portion, two sounds emitted sequentially one after the other.
- first sound signal may comprise only a sound portion, that is to say that it is transmitted at the same frequency from its beginning to its end.
- the first sound signal may alternatively comprise more than two sound portions, each portion having a frequency or a main frequency different from the frequency of the preceding portion and the frequency of the portion following the portion considered.
- the PWM control frequency is chosen according to the range of vibrations to be created. The higher their frequencies, the higher the PWM driving frequency is to obtain a sufficient sampling of the sounds to be emitted.
- the chosen frequency is however a compromise between the sharpness or the quality of the sound signal on the one hand and the computing resources, the energy consumption, the possibilities of heat dissipation and the economic constraints on the other hand.
- the method comprises the definition of several different electrical signals capable of causing the motor and / or the structure to emit several sound signals without the motor rotor rotating relative to the motor stator, each sound signal being associated with a particular piece of information. intended for a user. It follows that each electrical signal is associated with a particular information for a user.
- Each sound signal has its own meaning.
- the sound signals can be distinguished from each other by their melodies. These different melodies correspond to different information.
- the actuator improves security and user experience by providing new functions.
- the sound generation makes it possible to create a sound link between the actuator and the user, the sound then being an information vector.
- the objective is in certain cases to emit a signifying sound or carrying an understandable sound message, that is to say that one gives for example meaning to some melodies. It will prevent this direction being altered through the device which constitutes a filter for certain frequencies and / or an amplifier for other frequencies.
- the first electrical signal is for example of the trapezoidal type as described below with reference to FIG. 6.
- the duty cycle is constant. However, as illustrated in FIG. 6, the intensity of the current varies over time periodically due to an impedance variation of the motor when the frequency of the supply signal varies.
- the Applicant has found that it is unnecessary to use the maximum power of the inverter in the phase of sound generation. Indeed, from a threshold defined for each engine, the sound level is maximum. Thus, one can have a growth of the sound level on power levels lower than this threshold, then a saturation at this maximum level. For reasons of optimization of the motor overheating and therefore indirectly to maximize the possible duration of emission of a sound, the power of the inverter used will be limited to the predefined threshold. Such threshold power Pseuil is illustrated in Figure 1 1.
- the intensity of the current supplied to the motor due to the first electrical signal can be limited to reduce the power consumption. Therefore, it will be possible to emit a sound, or a melody, longer for the same level of warm-up. For example, this can be interesting if the sound is an alarm signal.
- the first power supply signal of the engine to allow the sound to be produced is not necessarily a malfunction signal from the engine to prevent it from spinning.
- the choice of The power of the feed signal is advantageously guided by considerations of energy efficiency and heating relative to a sound volume produced. In particular, it is possible to supply the motor at a frequency greater than a threshold frequency beyond which it can not rotate.
- the first electrical signal is a trapezoidal three-phase electrical signal.
- a period of the first electrical signal is represented between times T0 and T6. This period is divided into six sequences of identical durations, a switching of two of the 6 controlled switches occurring at the end of each of the sequences.
- the control signals of the 6 controlled switches are also represented.
- a control signal at state 1 represents a switch in the on state.
- This control logic makes it possible to generate a first electrical power supply signal for the motor at a first frequency equal to 1 / (T6-T0).
- the first electrical signal comprises three phase signals producing at each of the stator windings 120 ° phase-shifted signals relative to each other.
- the three signals at the windings are alternative signals.
- the intensity of the current supplying the coils can be controlled by acting on the duty cycle of the first electrical signal which is of the pulse width modulation type.
- the different gray levels indicate the different times of the PWM mode of the switches.
- the gray slots indicate the PWM controlled switches at a constant duty cycle to achieve the appropriate voltage drop to power the motor.
- the example below allows to realize the rotating magnetic field in the stator. As seen previously, it is possible to pilot the switches controlled differently to vary the magnetic field differently. In particular, it is possible to control a different number of switches and / or it is possible to phase out differently the supply signals applied to the coils.
- the first electrical signal is a three-phase electrical signal of pseudo-sinusoidal shape.
- a period of the first electrical signal is represented between times T0 and T6. This period is divided into six sequences of identical durations. The controls of the 6 switches are different in each of these sequences.
- the signals of the switches K1 to K3 are represented. They are controlled with a variation of the duty cycle between a minimum duty cycle value and a maximum duty cycle value.
- the signals at the terminals U, V and W (shown in FIG. 3) are 120 ° out of phase with each other and represented by the curves K1, K2 and K3.
- the control signals of the switches K1 and K4, K2 and K5, K3 and K6 are complementary to each other.
- the duty cycle of the control signal of the switch K1 is maximum when the duty cycle of the control signal of the switch K4 is minimal and the duty cycle of the control signal of the switch K4 is maximum when the duty cycle of the control signal of the switch K1 is minimal.
- This control logic makes it possible to generate a first electrical power supply signal for the motor at a first frequency equal to 1 / (T6-T0).
- the first electrical signal comprises three phase signals producing at each of the stator windings 120 ° phase-shifted signals relative to each other.
- the three signals at the windings are alternative signals represented on the last three chronograms of Figure 7.
- the first electrical signal could still be a sinusoidal electrical signal.
- the embodiment of the electronic control method may comprise three successive modes of operation as shown in FIG. 8.
- the first mode M1 an electrical signal is applied to the motor to rotate it as explained more above.
- the power supply to the motor is cut off.
- the engine stops.
- the first electrical signal is applied to the motor so that the electric motor and / or the structure emits the first sound signal without the motor rotor rotating relative to the motor stator. This supply is performed in open loop, that is to say without taking into account the position of the rotor.
- the invention also relates to a computer program product downloadable from a communication network and / or recorded on a data medium readable by a computer and / or executable by a computer, characterized in that it comprises code instructions of computer program for implementing the method described above, when the program is executed by a computer and / or in that it comprises instructions which, when the program is executed by a computer, lead it to implement the previously described method.
- the invention also relates to a computer readable data storage medium on which a computer program including program code instructions is stored.
- implementation of the previously described method or computer readable recording medium comprising instructions which, when executed by a computer, lead it to implement the method described above.
- the method of electronically controlling the power supply of an engine or the method of generating sound by an engine is particularly efficient for brushless magnet motors and coiled rotor motors.
- a DC motor controlled in this way would inevitably turn. To prevent its rotation, it would then be necessary to under-feed it.
- the sound generation process is less efficient since the absence of the magnets field limits the vibration and acoustic level.
- the first electrical signal may also have a first frequency for producing an animal repulsion sound, in particular a first ultrasonic type sound signal.
- the method comprises a step of defining the first electrical signal allowing the emission, by the motor and / or the structure, of an ultrasonic sound signal without the motor rotor rotating relative to the motor stator and a step of supplying the motor with the first electrical signal.
- a signal could be issued periodically at a fixed interval or more permanently. Beyond 16kHz or 20kHz, the electrical control signal makes it possible to create an ultrasound signal. This could especially be used to prevent a pet from staying between a shutter and a window and is trapped.
- the method which is the subject of the invention can be applied to various technical fields, in particular in the field of home automation equipment, in the field of automotive equipment and in the field of household electrical appliances.
- electric motors are used to produce actuators.
- these motors are discrete and they produce a minimum of noise when their rotors rotate relative to their stators.
- the motor is not directly related to the user that is to say that the sound emitted by the engine itself is not sufficiently audible.
- the noise emitted by the engine is of little importance.
- the motor is inserted into a tube of the actuator, which itself is inserted into a home automation device.
- the home automation device can be the home automation device and / or the structure of the building which, subjected to the vibrations of the engine, radiates the environment by emitting the sounds as a result of vibrations produced by the engine.
- the device is for example a home automation device for closing, occultation, sun protection or screen. It comprises, for example, a winding tube 3 to which an apron 4 is bonded.
- the home automation device may in particular be a shutter or a blind or a door or a gate or a screen.
- the structure surrounding the engine or linked to the engine may include all or part of the following elements directly or indirectly related to the engine:
- a movable element 3, 4 intended to be driven by the motor; and / or - a support 10 intended to receive the engine; and or - A trunk or box in which is enclosed the motor and the movable member in the folded or wound position; and or
- a resonant element 9 attached to the motor or to one of the elements listed earlier in this list.
- each emitted sound means information.
- the information may include:
- anomaly information in particular control information in contradiction with a management logic (for example thermal)
- orientation information orientation of a device to fix in a building
- a setting information of the motorization of a bay window an alarm information in case of intrusion into a space (alarm siren).
- the information may include in particular:
- a positioning information in the space vehicle reversing radar
- ground marking line crossing information on a roadway ground marking line crossing information on a roadway
- a buzzer in particular by vibrating the traction motor of an electric or hybrid vehicle.
- the information may include in particular:
- a frequency sweep can be performed to determine the vibration frequencies of the engine that generate sounds at a loud volume level. This maximizes the sound level.
- the method comprises the definition of the first electrical signal allowing the emission by the engine of an alarm sound signal without the motor rotor rotating relative to the motor stator.
- the first electrical signal it is possible in particular to define the first electrical signal so that it generates a resonance of the electric motor and / or the structure or to create an excitation at a close frequency a resonant frequency of the electric motor and / or the structure, in particular between 0.8 times and 1.2 times the resonant frequency.
- a resonance is preferably defined as a local maximum of sound volume (over a range of frequencies).
- first electrical signal whose first frequency changes temporally and periodically between a first lower terminal and a second upper terminal.
- Evolution is preferably progressive.
- the evolution can be carried out continuously in frequency or by jumping by selecting one after another, different discrete values of frequencies.
- the first lower bound is for example greater than or equal to 500 Hz, or even greater than or equal to 1000 Hz
- / or the second upper bound is for example less than or equal to 5000 Hz, or even less than or equal to 10000 Hz.
- the motor and / or the structure is necessarily excited at one or more frequencies generating sounds with a high sound level or volume.
- the method may comprise a configuration phase in which:
- a second electrical signal is defined whose frequency evolves temporally and, optionally periodically, between a first lower bound and a second upper bound. Evolution is preferably progressive. The evolution can be performed continuously in frequency or jump by selecting one after the other different discrete values of frequencies.
- the first terminal lower is for example greater than or equal to 500 Hz, or even greater than or equal to 1000 Hz and / or the second upper bound is for example less than or equal to 5000 Hz, or even less than or equal to 10000 Hz;
- the motor is powered with the second electrical signal
- the user indicates, by an appropriate action, for example by an action on a key of a control point of the engine, the moment when the motor and / or the structure emits a sound that suits him. during the second substep;
- the frequency of the second electrical signal corresponding to the moment indicated by the user is recorded as the first frequency of the first electric signal to be used for subsequently transmitting the first sound signal, in particular the first siren-type sound signal.
- the frequency of the first electrical signal periodically changes between 500 Hz and 5 kHz.
- the period of evolution of the frequency is 1 second.
- the electronic control device or, more generally, the actuator system may comprise an element of wired or wireless communication for sending a control command directly or indirectly to at least one other actuator system also having a second motor.
- This control command is advantageously a power control command of the second engine for producing a sound, in particular an alarm siren sound, without the second motor running.
- the sound is radiated by a mechanical structure.
- the structure can be the structure of the engine itself. The latter then emits a sound in connection with the command. It is usually sought to avoid the resonances of the engine, especially in a usual mode of operation for the purpose of driving the movable element. In a particular mode of operation of the engine for emitting sounds, to maximize the radiated noise, it is envisaged to cause one or more particular resonances of the engine, its housing or its cylinder head for example. To do so, we must focus on creating a spatial and temporal coincidence between the excitation and the response of the structure. This means creating a conjunction between a waveform and a frequency of the excitation with a proper mode and a natural frequency of the motor.
- small wave numbers will be favored, especially, but not exclusively, the 0-order, just as the frequencies between 1 kHz and 5 kHz, which correspond to the interval in which the human ear is most sensitive. More generally, it is possible to produce sounds in the range of frequencies audible by the human ear, or even the range of ultrasonic frequencies.
- the mentioned structure may also be the support 10 or the engine reception equipment. Again, it is possible to maximize the sound level by seeking a resonance of the structure. This can be achieved by a frequency sweep. It can be permanent in the life of the product; it is then a siren whose amplitude varies with the frequency thanks to the impedance of the circuit and the maintenance of the duty cycle of the PWM. Naturally, it is possible to enslave to obtain a constant amplitude.
- the frequency sweep can also be supervised by a PLC or an individual. The frequency at which the response is maximal can be used as the frequency of utility for transmitting the information. In the case of supervision by an individual, the frequency chosen is not necessarily that or the answer is maximum but could be the one where the sound or a succession of sound is the most pleasant.
- the structure may include the mobile element to be driven and the same principles apply.
- the structure may be an external element added to the equipment in order to act as a means of transmitting and maximizing noise.
- the installation or the actuator system or the actuator then comprises an additional reported mechanical structure including an element 9 resonating at a sound frequency audible by the human ear or ultrasound.
- a sound frequency audible by the human ear or ultrasound.
- a frequency is between 500Hz and 20kHz.
- This element can for example act in a similar way to a tuning fork, so that after an excitation it vibrates at its own frequency and radiates a sound accordingly in its environment. This element can only be added to make a noise.
- the method described above makes it possible to use an engine as a vibration generator by driving at least one of the phases without the rotor rotating relative to the stator. It is therefore possible to generate vibrations II and consequently sounds without physical means additional than the existing motor and electric converter to create solidarity / aerial sound. For example, it is sufficient to program software means of an inverter to obtain such a result.
- home appliances could benefit from this invention by using the motors present as a washing machine motor, or a pump motor of a dishwasher, or even a motor of a mixer.
- the invention can be applied to the automotive field which loads many actuators to start with engines for mirrors, or for windshield wipers, or even for ventilation.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Birds (AREA)
- Insects & Arthropods (AREA)
- Pest Control & Pesticides (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1763235A FR3076043B1 (fr) | 2017-12-27 | 2017-12-27 | Procede de commande electronique d'un moteur. |
| PCT/EP2018/086877 WO2019129782A1 (fr) | 2017-12-27 | 2018-12-26 | Procédé de commande électronique d'un moteur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3732778A1 true EP3732778A1 (fr) | 2020-11-04 |
Family
ID=63637915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18825737.2A Pending EP3732778A1 (fr) | 2017-12-27 | 2018-12-26 | Procédé de commande électronique d'un moteur |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20200410827A1 (fr) |
| EP (1) | EP3732778A1 (fr) |
| FR (1) | FR3076043B1 (fr) |
| WO (1) | WO2019129782A1 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3119953B1 (fr) | 2021-02-18 | 2024-12-20 | Somfy Activites Sa | Procédé de commande d'un dispositif de manœuvre comprenant un actionneur maître et un actionneur esclave et système domotique d'occultation associé |
| IT202100017408A1 (it) * | 2021-07-01 | 2023-01-01 | Ferrari Spa | Veicolo stradale provvisto di un dispositivo di riproduzione per la realizzazione di un suono associabile ad un motore elettrico e relativo metodo |
| DE102021122643A1 (de) | 2021-07-19 | 2023-01-19 | Liebherr-Hausgeräte Ochsenhausen GmbH | Kühl- und/oder Gefriergerät |
| CN114666713B (zh) * | 2022-03-31 | 2023-09-01 | 广州极飞科技股份有限公司 | 一种电机发音控制方法、装置、存储介质及电子设备 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3893801B2 (ja) * | 1999-07-05 | 2007-03-14 | 株式会社明電舎 | Pwmインバータ |
| DE19938670A1 (de) * | 1999-08-14 | 2001-05-17 | Braun Gmbh | Als elektro-akustischer Wandler angesteuerter elektrischer Elektromotor |
| DE102013215846A1 (de) * | 2013-08-12 | 2015-02-12 | BSH Bosch und Siemens Hausgeräte GmbH | Haushaltsgerät mit Tonausgabeeinheit |
| KR101735607B1 (ko) * | 2015-09-09 | 2017-05-15 | 엘지전자 주식회사 | 모터 구동장치, 이를 구비하는 홈 어플라이언스, 및 이동 단말기 |
| CN108885473B (zh) * | 2016-03-30 | 2021-05-14 | 深圳市大疆创新科技有限公司 | 用于控制电机的方法和系统 |
-
2017
- 2017-12-27 FR FR1763235A patent/FR3076043B1/fr active Active
-
2018
- 2018-12-26 US US16/956,711 patent/US20200410827A1/en not_active Abandoned
- 2018-12-26 EP EP18825737.2A patent/EP3732778A1/fr active Pending
- 2018-12-26 WO PCT/EP2018/086877 patent/WO2019129782A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3076043A1 (fr) | 2019-06-28 |
| WO2019129782A1 (fr) | 2019-07-04 |
| FR3076043B1 (fr) | 2022-08-05 |
| US20200410827A1 (en) | 2020-12-31 |
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