Classifications

• • 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
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
  • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
  • G01P3/42—Devices characterised by the use of electric or magnetic means
  • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
  • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
  • G01P3/42—Devices characterised by the use of electric or magnetic means
  • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
  • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
• • 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
  • H02P2205/00—Indexing scheme relating to controlling arrangements characterised by the control loops
  • H02P2205/05—Torque loop, i.e. comparison of the motor torque with a torque reference

Definitions

• the invention relates to a control system for an instrumented rolling machine.
• EP-A-1 298 785 there is described an instrumented bearing for an electronically commutated motor which comprises a circular multipole encoder and a fixed sensor which delivers quadrature digital signals in pulse form to a circuit of control by electrical switching of the power supply of said electric motor with instrumented bearing.
• the control circuit produces a polyphase wave each phase of which is supplied to a particular winding of the electronically commutated motor, so that it can be controlled or controlled in speed.
• Document FR-B-2.830.139 describes a pulse-controlled electronic switching device in which the motor comprises a circular multipole encoder associated with the rotating ring of a bearing, which then takes the form of a rolling bearing. instrumented.
• the encoder includes a multipole track and a fixed sensor which detects the pole passage of the circular multipolar encoder to provide quadrature switching signals for an electronic circuit of currents in the motor phase windings.
• EP-A-1 408 603 describes a control device for an electronically commutated motor in which an encoder comprises a main multipolar track and a multipole track, called a "top tower", concentric and a sensor is provided to produce, on the one hand, quadrature switching signals and, on the other hand, a third "top-turn” switching signal.
• the signals from the sensor are transmitted to a control circuit or switching currents in the windings so as to produce a suitable power supply of the electronically commutated motor to which the encoder is associated.
• EP-A-1 404 016 describes a control device for an electronically commutated motor in which a second resolver-type sensor is avoided after the measurement with the aid of an incremental encoder. .
• a resolver-type sensor would have a footprint making mechanical integration in an electric machine difficult.
• document EP-A-1 404.016 teaches the use of both a single encoder with a main multipole track and a multipolar track, called “top tower”, on the incremental encoder arranged in relation to the rotor of the motor, so that the sectors of the track of the "top tour" comprise a plurality of singularities distributed angularly.
• a fixed sensor disposed facing the incremental encoder produces, on the one hand, a plurality of quadrature signals and, on the other hand, a plurality of signals related to the singularities of the "top tower" encoder.
• EP-A-1 298 785 discloses a control device of an electronically commutated motor with a two-track rotary encoder and a fixed sensor providing two quadrature signals and one signal at each revolution of the encoder.
• the encoder is a disc which is attached to a rotating part of the bearing interposed between the rotor shaft and the motor housing.
• a control circuit generates switching signals of a control circuit by switching the power supply of the electric motor from two current setpoints applied to the quadrature signals and the signal at each turn.
• the switching circuit is then slaved to the detection of these different signals.
• the state of the art as represented by the four aforementioned documents, teaches the use of a sensor for the rotation speed of an electrically commutated motor so as to provide control of the electronically commutated motor, a encoder being fixed to a rotating part of a bearing in a compact manner since the measurement sensor of the control parameter is integrated with the fixed part of the bearing.
• An instrumented bearing for a rotary machine suitable for providing these two pieces of information comprises a rolling body on the periphery of which is mounted at least one strain gauge for detecting the passage of intermediate elements, such as balls or rollers of the rolling body, on at least one raceway, as well as signal processing circuits produced by said at least one strain gauge to derive a signal representative of the torque and / or a signal representative of the rotational speed of the instrumented bearing.
• the instrumented bearing comprises a plurality of strain gauges secured in positions angularly distributed over the body of the bearing. • The instrumented bearing comprises a circu it to generate a signal representative of the torque exerted on a rotating part of the instrumented bearing.
• the circuits for processing the signals produced by using at least one strain gauge to deduce a signal representative of the torque and / or a signal representative of the speed of rotation of the instrumented bearing comprise means for determining the frequency signals collected by the bearing to deduce the speed of rotation of the shaft and incidentally its position.
• the instrumented bearing comprises strain gauges which measure the lateral forces experienced by the bearing. We then perform calculations to deduce the torque experienced by the bearing.
• the invention relates to a rotary machine control system comprising an electrical device for regulating its operation comprising control terminals connected to the outputs of a control circuit of which at least one input receives detection signals produced by at least one bearing. instrumented mounted on the rotor shaft of a rotating machine.
• the control circuit comprises means for converting the reading data of the sensors of the instrumented bearing into a control information delimited according to a control strategy determined at the control terminals of the electrical control member of the rotating machine, as a engine or generator, turbine or pump or blast motor.
• the rotating machine is controlled on a torque setpoint by means of a torque control loop comprising a servo error calculation circuit receiving said torque setpoint and said rolling torque measurement signal instrumented and whose output is connected to a correction circuit based on a Proportional control, a Proportional and Integral control, or a Proportional, Integral and Differential control, to control the modulation rate of a control signal generator in width.
• Pulses connected to the control input of the electrical control device of the rotating machine as a power converter for an electronically commutated motor.
• the system also includes a speed control loop based on a speed measurement signal from the instrumented bearing to adjust the frequency of the pilot wave of the pulse width control signal generator. .
• the system also includes a current sensor for realizing an additional loop of current control of the regulator.
• the system also includes a resolver for optimizing the efficiency on the electrical controller and includes a circuit for generating a pulse width control signal generator frequency control signal by means of an additive the control signal being obtained by integrating a signal proportional to the ratio of the differential amplitude to the differential phase produced by the resolver.
• the rotating machine is an explosion engine with a motorized intake flap carburetor.
• the system produces an adjustment of the throttle opening angle according to the real torque measured by the bearing. instrumented on the basis of a torque setpoint and a torque control loop.
• the system also optionally includes a rotational speed control loop and / or a control loop on a quantity of fuel comprising a calculation circuit of an ignition angle parameter, led it speed signal and / or said ignition angle signal being applied.
• Figure 1 is a block diagram of a mode of real isation of the system of the invention
• FIGS. 2 to 4 are block diagrams illustrating control strategies in the embodiment of the system of FIG. 1;
• FIGS. 5 and 6 are block diagrams illustrating control strategies in another embodiment of the system of the invention.
• FIGS. 6A and 6B are, respectively, FIG. 6A, a schematic diagram of an instrumented bearing used in the invention, and FIG. 6B, a diagram of the signal processing circuits of the parts of the instrumented bearing intended to produce ire the torque and speed signals.
• FIG. 6A schematically shows an instrumented bearing used in a preferred embodiment of the present invention.
• the instrumented bearing 100 is mounted on a rotation shaft such as the rotor shaft 110 of a rotating machine, not shown.
• the instrumented bearing 100 is essentially composed of a bearing of conventional type comprising a rotating part 1 02 ground idarized by idarisation ground means 1 07 to the rotation shaft 101 and a fixed part 103 intended to be mounted on the frame or on the stator of the rotating machine not shown.
• the rotating machine is ground idarized the fixed part of the bearing instrumented by idarisation ground means 1 10 and 1 1 1 d isposés over the entire periphery of the instrumented bearing.
• the instrumented bearing of the invention is strictly identical to a bearing of any kind of the state of the art.
• an optical encoder in the form of a d isque which read i is sol idaire, one disposes on the periphery of the instrumented bearing of the invention 100 a plurality of sensors, preferably strain gauges 108 and 109 which are sol idaires of suitable parts of the instrumented bearing.
• a suitable processing circuit of the gauge detection signal allows to deduce information representative of the speed of rotation of the instrumented bearing, and therefore the rotating machine on which it is installed.
• Ai and Aj are provided at the inputs of a signal processing circuit for developing the torque and / or rotational speed measurement signals 125.
• the detection signals of the sensors are processed by a conditioning circuit 121 intended to normalize and / or amplify the detected signals, on the one hand, and to reclassify them in connection with each other. phase with each other.
• the vector of the reconditioned detection signals produced by the conditioning circuit 121 is transmitted to the input of a filtering circuit 122 which makes it possible to avoid detections of parasitic phenomena by using an adapted filtering which the skilled person will be able to determine. .
• the filtered detection vector X from the filter 122 is applied to a generator circuit 123 of a signal representative of the torque applied to the rotating rotating part 102 of the instrument relative to its fixed part 103.
• the signal representative of the speed of Rotation of the rotation shaft 110 is determined by derivation, that is, by measuring the frequency of a periodic phenomenon on the magnitude representative of the torque produced from the circuit 1 23.
• the circuit of the invention also comprises a frequency shunt and measurement circuit 124 which produces a signal representative of the speed of rotation N of the rotation shaft relative to the fixed part. 1 03 of the instrumented bearing.
• the fact of depositing the strain gauges directly on the suitable parts of the instrumented bearing ensures that the forces experienced by the instrumented bearing are fully taken into account for the measurement of the signal representative of the torque and for the signal representative of the speed.
• FIG. 1 shows a first embodiment of the invention in which the rotating machine is an electric winding machine, such as an electronically commutated motor, in which the rotor 4 is made of a magnetic material and the stator 2 carries a plurality of windings 3 angularly offset, and supplied with suitable phases through a power converter 1 2 controlled by the driving circuit 10 of the servocontrol of the invention.
• the rotating machine is an electric winding machine, such as an electronically commutated motor
• the rotor 4 is made of a magnetic material and the stator 2 carries a plurality of windings 3 angularly offset, and supplied with suitable phases through a power converter 1 2 controlled by the driving circuit 10 of the servocontrol of the invention.
• an instrumented bearing 7 is mounted on the rotation shaft 5 of the engine 1.
• a second bearing 6 which may be identical or without instrumentation is provided on the other side of the rotor 4. The measurement signal, developed by the instrumented bearing
• such a rotating machine may be an explosion engine to drive a veh icule.
• Such a pallet comprises a raceway on which balls circulate between a rotor part mounted on the shaft and the surface of the bearing track.
• the instrumented bearing comprises strain gauges angularly distributed around the body of the bearing and in mechanical relation with the track, or raceway.
• strain gauges are able to provide indications on the rotational speed by the singularities produced on each strain gauge by the passage of a ball or roller of the instrumented bearing.
• the strain gages are finally able to produce a signal proportional to the stress force detected over a period determined by the strain gauge and, using a calculation circuit, to produce a torque measurement signal. exerted by the rotation shaft.
• the instrumented bearing of the preferred kind for the control device of the invention being disposed as close as possible to the rotating machine controlled by the servo-control circuit which will be described later, it is thus possible to limit the negative effects of games and mechanical delays introduced in such an assembly.
• the instrumented bearing of the preferred kind for the control device of the invention thus makes it possible to perform a torque control of a rotating machine that it equips without having to estimate the torque information by using in the case of an electronically commutated motor, or a generator of the same kind, by measuring the current and the voltage in at least one reference winding as is known.
• the estimation function becomes incapable or insufficient to achieve a relationship between current and voltage, on the one hand, and torque, on the other hand. Electrical estimation of the torque becomes impossible.
• the bearing instrumented by strain gauges capable of producing a torque measurement signal and / or rotational speed can produce reliable information, robust and free of parasites.
• the electrical signals for measuring the strain gauges of the instrumented bearing 7 of the preferred kind for the control device of the invention are produced by a first signal processing circuit 8 to produce a torque measurement signal 15 and, if appropriate by a second signal processing circuit 9 for producing a speed measurement signal 16.
• the signals for measuring the rotational speed 16 and the torque 15 are inputted to a control circuit 10 which also receives a reference signal 20.
• the setpoint signal 20 is produced by a management or control system (not shown) of the mechanical load (not shown) which is mechanically coupled to the rotation shaft 5 of the engine 1.
• This load can be an automobile accessory such as a window regulator or a driving wheel for an electric-powered vehicle or a steering mechanism in an electric power steering.
• the control circuit 10 produces at its output terminals 17-19 control signals of an electrical control device or device 12 which is supplied with electrical energy by an electric source 13.
• the power source is a DC power source such as a vehicle electric battery and the power conversion circuit 12 produces at its output a plurality of stator phase control signals via a power cable. supply of the electric motor 14.
• the pilot circuit 10 implements a determined control strategy which determines the power supply parameters of the electric motor 1 by adjusting the power converter circuit 1 2 by choosing in particular the frequency, the waveform, the intensity and the voltage of each of the phases of the pulsation wave delivered at the exit of circu it 12.
• the rotating machine is not an electric motor, but for example a gas or hydraulic turbine, or an electric generator, or an explosion engine, the rotating machine must have an electric organ acting on its operation, that is to say on the deltested torque and / or its rotational speed so that the control loops or on the base of the instrumented bearing associated with its rotation shaft is closed or are closed on the control dud it electrical organ by means of the control system of the invention.
• FIG. 2 shows a mode of realisation of a pilot circuit adapted to the control system of the embodiment of FIG. 1.
• the reference signal 20a is a torque reference signal to be supplied by means of the motor 1a.
• the reference signal 20a is supplied to the + input of an error signal generator 21 whose input terminal - receives a torque measurement signal 16a supplied by the instrumented bearing 7a mounted on the motor 1a. electronically commutated.
• the generated error signal is constituted by the instantaneous difference between the reference 20a and the torque 16a.
• the generated error signal is supplied to the input of a PI D controller 22 (Proportional Integral Differential) which realizes the synthesis of a torque control signal for the motor 1 a.
• PI D controller 22 Proportional Integral Differential
• the PI D 22 regulator realizes the synthesis of a correction signal of the servocontrol by running in parallel a proportional correction P of the error signal, an integral correction I of the error signal and a derivative correction D of the error signal. The three corrections are then added and their instantaneous sum is the output signal of the complete PI D corrector.
• the PID regulator or corrector can be reduced to a proportional and integral corrector, to a proportional and derivative corrector, or to a derivative proportional and integral corrector, according to the desired level of performance.
• the torque control loop is completed by a second closed inner loop, controlling and / or controlling the armature current of the motor 1a.
• a second error signal generator 23 receives, on its positive input, the correction signal of the torque control of the corrector 22, as well as on its negative input a signal 29 for measuring current I, produced by by a current sensor 26, connected to one of the phases 27 of the stator of the electronically commutated motor 1 a.
• the error signal produced by the error signal generator 23 is in turn supplied to a second PI D 24 corrector which executes the synthesis of a correction signal of the torque and current servo control as well as that he is known.
• PI D 23 corrector it is also planned to replace the PI D 23 corrector by a proportional and integral corrector, or by a proportional and derivative corrector, or by a derivative and integral corrector according to the desired performance level.
• the control signal in torque and rotational speed is connected to the control input of a pulse width modulation (PWM) circuit 25 which produces three phase control signals 1 7, 18 and 19 according to the control strategy executed by the pilot circuit 1 0a and determined according to the geometry of the stator windings, in the case of a three-phase stator.
• PWM pulse width modulation
• the three stator supply waves are shifted by 1 20 ° relative to each other, and the control wave is constituted by a square, trapezium or triangle signal chosen according to the control strategy executed by the 10a and the amplitude of which, in time, depends on the value of the control signal in torque and speed of rotation from the corrector 24.
• the frequency of the carrier modulating signal produced by the PWM pulse width modulation generator 25 is determined by the rotational speed measurement signal 15a produced by the rotational speed sensor 9 of the instrumented bearing 7a mounted in connection with the motor rotor 1 a.
• the power converter circuit 1 2a here a transistor bridge inverter, which serves as an electrical component of the rotary machine here realized by an electronically commutated motor, receives the three control signals of the windings generated by the 10a and 3 output of voltage or current by converting the continuous electrical energy produced by an electric battery (not shown), providing the primary energy to the slave system.
• FIG. 3 shows a simplified embodiment of the circuit of FIG. 2 in which the current control loop has been suppressed by suppressing the current sensor 26.
• the torque reference signal 20b is supplied to the positive input of a single error signal generator 31 whose negative input receives the torque measurement signal 16b of the instrumented bearing 7b.
• the speed measuring signal 15b produced by the instrumented bearing 7b is supplied to the input of a pulse width modulating circuit 35, operating as described for the circuit 25 of FIG. 1.
• An output signal of the corrector 32 is applied to the pulse width adjustment input of the pulse width modulation circuit 35.
• the output of the power converter 12b produces three phases connected to each of the stator windings of the motor 1b phase shifted in a predetermined manner and having the desired voltage profile applied by the power converter 12b.
• the dynamic performance of the control is affected by the linearity of the torque-current relationship. But as the saturation reduces the coefficient of proportionality between the torque and the current, the gain of the loop is reduced, which reduces the risk of instability for an increase in torque response, which however remains very short.
• the response time depends only on the speed to generate the measurement signals by the conditioning circuits 8 and 9 of the instrumented bearing 7 and by the current dynamics of the inverter / motor assembly.
• the dynamic performance of the servo-control scheme of FIG. 3 is improved by intercalating a linearization block between the PID regulator 32 and the PWM pulse width modulation generator 35.
• the linearization block contains a table of values related to the iron saturation curve of the machine and its geometry.
• the iron saturation curve of the machine is obtained by tests and measurements, or else by finite element simulation of a ferromagnetic model of the electric machine. A mapping is deduced to establish the table of values related to the iron saturation curve.
• the table of values related to the iron saturation curve of the machine and its geometry is obtained by an auto-adaptive method which consists in varying the current from a zero value to a maximum value. and to record a sequence of corresponding torque values given by the instrumented bearing 7b once the steady state is reached.
• the measurement is performed over the entire range of speeds in order to further refine the dynamic response and it is implemented in a control computer of the linearization block interposed between the PID regulator and the PWM generator. when using the vehicle drive motor (s).
• FIG 4 there is shown another embodiment of a rotary machine control system in which the rotating machine is still a three-phase electric motor.
• the three-phase electric motor 1c cooperates with a resolver so as to make it possible to detect the electromechanical efficiency of the rotary machine by measuring the part of the active power and the part of the reactive power exchanged with a primary source of energy 51 here constituted by a battery pack.
• the control circuit 10c includes an input terminal of a torque setpoint 20c.
• the torque setpoint 20c is supplied to the + input of an error signal generator 41 whose input terminal - receives the torque measurement signal 16c from the instrumented bearing 7c in relation to the rotor shaft electric motor 1 tbsp.
• the error signal from the generator 41 is supplied to the input of a corrector 42, in particular of the type PI D, the correction signal of which is supplied to the input of a generator 43 with modulation of the width. PWM pulse, at a determined frequency.
• the motor 1c cooperates with an electromagnetic resolver
• the resolver 54 is used in a means to maximize the power factor and torque provided by current supplied to the motor.
• the current and voltage measurements on each of the phases are carried out by suitable means and are shaped by the resolver 54 so as to produce a signal 55 proportional to the relative amplitude between the two phases 52 and 53. on the one hand, and a phase-shift signal 56 between the two phases 52 and 53, or on the inputs of a circuit 64 to produce a control signal of the frequency of the PWM pulse width modulation generator 43, with a frequency determined.
• An output terminal 55 of the resolver 54 provides the interphase differential power signal at the input of an electrical signal bypass circuit 57 whose output is connected to the numerator input of a drive circuit. Decision 51.
• An output terminal 56 of the resolver 54 provides the phase signal between voltage and current at the input of an electrical signal bypass circuit 58 whose output is connected to the denominator input of the decision circuit 59.
• the output of the decision circuit 59 produces a signal proportional to the ratio of the frequency difference to the phase which is supplied to the input of a circuit 60 for determining the sign of the input value.
• the absolute value of the ratio of amplitude to phase is supplied to an inverter 61 whose output is applied to a amplifier with predetermined gain 62 and the output of which is provided to an integrator circuit 63 making it possible to perform the integration of the amplified signal from the ampli fi er 62.
• the integrator 63 is connected by the output of the circuit 64 to a first input of an adder 46 of the PWM generator 43 of the control circuit 101c. A second entry of the additor
• the output of the adder 46 is applied as a phase input of a sine wave generator 47 whose output has a frequency and an instantaneous phase which are determined by the measurement signal 15c of the rotational speed of the the engine provided i by the instrumented bearing rotation speed sensor 7c and by the integral signal from the resolver 54 and produced by the circuit 64, synthesis of optimal control in terms of the electromechanical efficiency of the rotating machine.
• a second input receives the corrector correction signal 42 of the aforementioned torque control band.
• the modulation is then used as the control signal of PWM generator 49 in pulse width modulation which produces three control signals with a phase shift corresponding to the static windings of the electronically commutated motor 1c.
• These control signals of the generator 49 are applied to the control inputs of the control circuit 12c to provide the appropriate power waves to the stator windings of the motor 1c.
• the two control loops realized on the speed of rotation and the torque are dimensioned so as to avoid any risk of instability due to mutual coupling.
• the present invention also applies to other rotating machines that do not necessarily transform the energy. ie electricity directly.
• the invention is adapted to the control of a thermal engine according to any thermodynamic cycle Suitable, such as a cycle Otto, Diesel, Stirling, Rankine, and also to a gas turbine.
• thermodynamic cycle Suitable such as a cycle Otto, Diesel, Stirling, Rankine, and also to a gas turbine.
• control parameters are the amount of air, the stoichiometry imposed by the depollution then defining the amount of fuel to be injected.
• control parameter is the amount of fuel consumed, the air flow being imposed by the engine speed.
• a rotating machine such as a heat engine mentioned above, must cooperate by its power supply with at least one control member whose control can be achieved electrically by the control circuit provided in the control system of the invention.
• the rotating machine must comprise a rotor part equipped with a shaft, or an equivalent, and which can rotate on a frame by means of at least one instrumented bearing according to the invention.
• FIG. 5 shows an embodiment of a control system of the rotary machine in which the rotating machine is constituted by a combustion engine whose intake manifold comprises a throttle valve and whose opening angle can be controlled by an electric motor powered from the vehicle battery via an electric converter which serves as an electrical member for this rotating machine.
• control system of the invention produces an adjustment of the opening angle of the throttle valve according to the actual torque developed on the engine, torque actual measured instantaneously by the torque sensor associated with the instrumented bearing.
• the torque setpoint is supplied to an input terminal 20d of the control circuit 1 Od at the first positive input of an error signal generator 70 whose negative input receives the signal 1 6d from the instrumented bearing torque sensor 7d, mounted on the crankshaft in (not shown) of the explosion motor 1 d '.
• the output of the error signal generator 70 is connected to the input of a PI D (Proportional Integral Differential) controller 71 whose output signal controls the adjustment of the throttle valve equipated with a controller 12d of adjustment.
• PI D Proportional Integral Differential
• the throttle valve thus makes it possible to adjust the air flow rate in the heat engine 1 d whose crankshaft is mounted on the bearing 7d of the preferred type for the control device of the invention for measuring its actual torque.
• FIG. 6 shows another embodiment of the invention in which an application of the control system of the invention adapted for an explosion motor has been described.
• control circuit has two setpoint inputs 20e1 respectively for a torque setpoint to be delivered by a heat engine 1e ', and a second input 20e2 of a setpoint signal of a quantity of fuel admitted into the explosion engine.
• the rotating machine 1 e comprises in particular a thermal explosion engine 1 e 'and a rolling instrumented 7th of the kind preferred for the control device of the invention mounted on the crankshaft and the housing of the engine. It receives an energy produced by the fuel tank and whose quantities and flow rates are regulated by a control circuit 12 having an air quantity adjusting member or throttle valve 82, driven by an electric motor for adjusting the throttle gases and an ignition control circuit 83.
• a first control or servocontrol loop uses the torque measurement signal 16e produced by the torque sensor associated with the instrumented bearing 7e which supplies the negative input terminal of a circuit 80 for calculating control errors. whose positive input receives the torque setpoint signal 20e1.
• the output of the error calculation circuit 80 is supplied to the input of a PID corrector 81 whose output signal is supplied to an input of a control circuit of the degree of opening of the throttle valve. gases 82.
• the output of the control circuit 82 produces an electrical control signal for the electrical adjustment members of the rotating machine 1 e.
• it is an explosion motor 1 e 'equipped with an electric motor (not shown) whose axis is coupled with a gearbox suitable for the throttle control shaft intake (not shown) of the explosion motor 1 e '.
• a second control or servocontrol loop uses the requested 20e2 fuel quantity request or admitted signal and deduces therefrom the electrical ignition signals transmitted to the ignition plugs of the engine.
• the second loop comprises a circuit 83 generating electrical spark ignition signals which develops to supply a coil with electrical energy taken from the on-board battery of the vehicle, a sequence of high voltage pulses depending of the speed measuring signal of the crankshaft 15e delivered by the speed measurement sensor 8 associated with the instrumented bearing 7e, mounted on the crankshaft (not shown) of the explosion motor
• the circuit 83 generating the electrical ignition signals receives on a suitable input a ignition angle parameter which determines the ignition timing of each cylinder in the ignition cycle of the explosion motor 1 e 'with respect to the top dead center TMP spotted on the crankshaft using the bearing 7e.
• the ignition angle parameter is produced by a calculation circuit of an ignition angle parameter 91.
• the ignition angle parameter 91 is produced from the reference signal and comprises a differentiator circuit 84 of the amount of fuel admitted 20th 2.
• a second branch circuit 85 receives the ignition angle previously calculated parameter.
• the outputs of the two differentiators 84 and 85 are divided on a divider circuit 86, followed by a sign determining circuit 87 followed by an inverter 88 whose output is integrated by an integrator circuit 90 after amplification on an amplifier 89.
• control system of the invention implements a predetermined control strategy which is recorded as a program in a memory of a microcontroller used to realize the control circuit described hereinbelow.
• a control strategy generates a control signal on the basis of at least one setpoint signal by means of one or more torque control loops, and / or current and / or speed and / or power measured on the basis of a resolver, torque and speed being measured by means of the instrumented bearing of the invention.
• the control signal is adapted to the electrical device for adjusting the operation of the rotating machine such as a power converter for an electronically commutated motor or a motorized motor-jet carburetor flap.
• the strategy consists in adapting the power supplied to the rotating machine or produced by it according to the torque setpoint and if necessary other instructions such as the quantity of fuel.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Control Of Electric Motors In General (AREA)

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• 2009
  • 2009-07-06 FR FR0954647A patent/FR2947643B1/fr not_active Expired - Fee Related
• 2010
  • 2010-07-06 WO PCT/FR2010/051422 patent/WO2011004115A1/fr active Application Filing
  • 2010-07-06 EP EP10742207A patent/EP2452428A1/de not_active Withdrawn

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