EP3414832A1 - Détermination d'un couple de décélération d'une machine électrique accouplée à un moteur à combustion interne au moyen d'une roue libre - Google Patents

Détermination d'un couple de décélération d'une machine électrique accouplée à un moteur à combustion interne au moyen d'une roue libre

Info

Publication number
EP3414832A1
EP3414832A1 EP16820294.3A EP16820294A EP3414832A1 EP 3414832 A1 EP3414832 A1 EP 3414832A1 EP 16820294 A EP16820294 A EP 16820294A EP 3414832 A1 EP3414832 A1 EP 3414832A1
Authority
EP
European Patent Office
Prior art keywords
electric machine
speed
internal combustion
combustion engine
phase
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.)
Withdrawn
Application number
EP16820294.3A
Other languages
German (de)
English (en)
Inventor
Paul Mehringer
Joerg Maas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3414832A1 publication Critical patent/EP3414832A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/06—Control effected upon clutch or other mechanical power transmission means and dependent upon electric output value of the generator
    • 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
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
    • 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
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/008—Arrangements for controlling electric generators for the purpose of obtaining a desired output wherein the generator is controlled by the requirements of the prime mover

Definitions

  • the present invention relates to a method for determining a deceleration torque of a coupled to a freewheel to an internal combustion engine electric machine, and a computing unit, preferably a controller for an electric machine, and a computer program for its implementation.
  • electrical machines for regulating the vehicle electrical system voltage in vehicles, electrical machines, in particular externally excited electrical machines, can be used. These have a controller which regulates the excitation current of the electric machine as a function of the vehicle electrical system voltage.
  • the most accurate possible knowledge of the torque absorbed by an electric machine is generally of general interest, in particular in order to regulate accordingly a control of an internal combustion engine driving the electric machine.
  • the knowledge of this torque absorption of the electric machine is also of special interest, in particular when the internal combustion engine is in a control-critical operating condition, such as the idle state.
  • the torque absorbed by the electric machine in tips can assume very high values, the power output of the internal combustion engine or the associated torque being rather small or fluctuating, which can result in considerable speed instabilities of the internal combustion engine. In extreme cases, this can even lead to that the generator 'stalled' the combustion engine with its torque, that is, the rotation of the internal combustion engine stops. This is due to the fact that the internal combustion engine only outputs its torque in a pulse-like manner, ie in each of the power strokes. In the intermediate phases, the internal combustion engine can not control its torque.
  • torque detection methods are known from the prior art, which estimate the presence of the torque via a detection of the excitation current of an electrical machine and its speed.
  • this is a rather cumbersome and not sufficiently accurate for some applications method, since in addition to the excitation current and the speed additional power loss components of the electric machine enter into the process that must be either estimated or elaborately calculated by means of a model.
  • Such a method is described for example in DE 100 401 112 AI.
  • an electrical machine can also be an electric machine which can be operated as a generator and / or motor, for example a so-called starter generator.
  • the invention relates to a method for determining a deceleration torque of an electric machine coupled to a freewheel to an internal combustion engine, as well as to a computing unit and a computer program for carrying it out with the features of the independent patent claims.
  • advantageous Embodiments are the subject of the dependent claims and the following description.
  • the method is used to determine a deceleration torque of a coupled to a freewheel to an internal combustion engine electric machine.
  • the electric machine can be driven by the internal combustion engine, wherein the electric machine with the internal combustion engine typically fixedly connected and can be coupled to the crankshaft, for example by means of a belt drive. Due to the coupling between the electric machine and the internal combustion engine, depending on the operating state of the electric machine, torque can be transmitted to the electric machine by the internal combustion engine. On the part of the electric machine, the torque of the internal combustion engine is counteracted by a deceleration moment, which should be overcome, in particular in the idling state, in order not to impair the operation of the internal combustion engine.
  • a time profile of the rotational speed of the electric machine is detected.
  • the detection of the rotational speed of the electric machine can basically by a speed sensor, for example on the shaft of the electric machine or on the basis of a phase signal of the electric machine, but also on the basis of
  • Data detected by an engine control unit can be determined.
  • a freewheeling phase is a state in which the freewheel, via which the electric machine is coupled to the internal combustion engine, is active. The freewheel is active when the speed of the electric machine, the crankshaft speed of Brennkraftma- exceeds.
  • the freewheeling phases as such can also be detected with the aforementioned measures.
  • the deceleration torque of the electric machine is determined by evaluating the time change of the rotational speed of the electric machine in the freewheeling phase.
  • the deceleration torque of the electric machine can only be determined based on simple physical variables when the electric machine is decoupled from the internal combustion engine. This is in a forced coupling of the electric machine with an internal combustion engine, for example via a belt drive, in particular the case when the respective coupling element engages via a freewheel to the electric machine and the freewheel is in a corresponding freewheeling state.
  • the respective retarding torque of the electric machine in the respective operating state of the electric machine can be determined in a very simple manner.
  • the rotational speed of the electric machine is determined from at least one phase signal of the electric machine, in particular a phase voltage and / or a phase current of the electric machine.
  • This refinement is advantageous since the rotational speed can be determined directly from measured variables already available in the electrical machine, without requiring a further sensor, for example a rotational speed sensor which determines the rotational speed of the machine or a signal of an external computing unit, for example an engine control unit must be used to determine the speed of the electric machine.
  • the detection of the rotational speed is carried out by means of a controller of the electric machine.
  • cumulative or alternative determination of the operating states of the electric machine or of the freewheeling states having the freewheeling phases as such and the determination of the deceleration torque of the electrical machine are likewise effected by means of the controller of the electrical machine.
  • the controller is structurally integrated into the electric machine or arranged on the electric machine.
  • the execution of the respective method steps in the controller of the electric machine is advantageous because it does not necessarily to carry out the individual steps or the entire process flow a communication line, for example, a LIN connection between the electric machine and an external unit such as an engine control unit.
  • the electrical machine and the associated controller are thus basically configured to carry out individual steps of the method or the entire method completely autonomously from an external computing unit.
  • a manipulated variable influencing the deceleration torque is changed.
  • the actuating variable influencing the deceleration torque is detected before the chronological progression of the rotational speed of the electric motor
  • the freewheeling phase of the electric machine is detected by detecting the change of the
  • the manipulated variable influencing the deceleration torque is also timed to detect the time profile of the rotational speed can be summarized in order to achieve the previously described goal or goals described below.
  • the manipulated variable influencing the deceleration torque is preferably the exciter current of the electrical machine.
  • other manipulated variables influencing the deceleration torque can also be changed in order to achieve the effects described above or below.
  • a freewheeling phase of the electric machine In a freewheeling phase of the electric machine whose speed change or speed gradient is significantly related to the deceleration torque of the electric machine.
  • a freewheeling phase of the electric machine can be very reliably detected, since, as a first approximation, the rotational speed is dependent on the decelerating torque of the electric machine only in the freewheeling phases, whereas the rotational speed in the phase in which the electrical machine is driven by the internal combustion engine is not significantly affected by the deceleration torque of the electric machine.
  • this only applies as long as the deceleration torque does not reach values sufficient to significantly influence the operating state of the internal combustion engine.
  • the extent of the torque application can be selected correspondingly or corresponding threshold values can be provided during the detection.
  • a further advantageous effect of a change, the manipulated variable influencing the deceleration torque can be seen in the fact that here specifically machine-side parameters which have a direct influence on the deceleration moment of the electrical machine and in turn depend on the exciter current can be varied accordingly.
  • the manipulated variable influencing the decelerating torque is reduced to a minimum value, preferably to zero.
  • Influence on its deceleration torque for the time of reduction of the manipulated variable to a minimum value or to zero reduced or set to zero. All power dissipation components that are not dependent on the excitation current, such as the power loss due to a fan of the electrical machine or due to bearing losses, can be made directly accessible thereby and be determined. This has the advantage that as a result damage or defects of the bearing and / or the fan of the electric machine can be determined. In addition, it can be concluded on knowledge of the respective contributions to the deceleration torque of the fan or bearing on the deceleration torque of the freewheel.
  • a defect of the electric machine can be determined here, which have a direct influence on the freewheeling phase. These include, for example, defects of the freewheel and / or effects of the bearing of the electric machine.
  • the change of the manipulated variable influencing the deceleration torque of the electrical machine takes place clocked.
  • a timing of the manipulated variable, in particular of the excitation current is particularly advantageous, since in this way the clock frequency and the amplitude of the manipulated variable can be chosen such that a freewheeling phase can be determined very simply by determining the significant pattern on the basis of the clock pattern. Furthermore, this can be minimized by the choice of the amplitude and the repetition rate of the timing disadvantageous influence of this change in the manipulated variable, for example, on the smoothness of the internal combustion engine or a disturbance of the energy fed into the electrical system of a motor vehicle.
  • the clock frequency is greater, more preferably at least by a factor of 2 greater than a frequency of the oscillating speed fluctuation of the internal combustion engine. This refinement is particularly advantageous since typically the freewheel is active in the falling speed flanks of the oscillating speed fluctuations caused by the internal combustion engine.
  • the free-running phase of the electric machine by detecting a time interval of the rotational speed from the time profile of the rotational speed, wherein the time interval has a maximum speed, a minimum speed and an intermediate speed maximum and minimum speed arranged falling speed edge, and by detecting one for the Freewheel state characteristic behavior of the speed of the electric machine in the time range of the falling speed edge can be determined.
  • This method for determining a freewheeling phase of the electric machine can be used either cumulatively or alternatively to the previously described method in which the freewheeling phase is determined by a change in a manipulated variable influencing the decelerating torque.
  • the advantages are that the results resulting from the respective investigation methods are compared and the respective free-wheeling phase can be determined on a redundant basis, which significantly increases a reliable determination of a freewheeling phase.
  • a determination of the freewheeling phase can be determined in a particularly simple manner only by the course determination of the temporal speed behavior of the electric machine, without this in addition still another manipulated variable must be changed.
  • the time interval is selected such that this additionally has an ascending speed edge, wherein the freewheeling phase is determined by comparing the ascending speed edge and the descending speed edge.
  • the speed behavior of an electric machine coupled via a freewheel to a firing machine typically has an asymmetrical course, with the rotational speed flanks, which are correlated with a drive phase of the electric machine, running significantly steeper than the falling speed flanks, which are correlated with the freewheeling phase. From this characteristic course, a free-wheeling state of the electric machine can also be determined safely and particularly easily.
  • the free-running state of the electric machine can be determined by comparing the rotational speed of the electric machine and the rotational speed of the crankshaft of the internal combustion engine.
  • comparing the rotational speed of the internal combustion engine, in particular the crankshaft speed in comparison with the rotational speed of the electric machine can be particularly easy to determine based on the speed difference, when the electric machine has a freewheeling phase.
  • the information about the crankshaft speed for example, based on an engine control unit and to the electric machine, in particular their controller by means of a communication connection, in particular a LIN connection can be determined.
  • an efficiency of the electric machine by determining a mechanical power, which is determined from the deceleration torque of the electric machine and the speed thereof, and the ratio of the mechanical power with an electrical power of the electrical Machine to be determined.
  • a direct determination of the efficiency of the electric machine, which is driven by the internal combustion engine, usually fails because the drive torque of the internal combustion engine as such can not be determined.
  • a state has to be found in which the electrical machine is decoupled from the internal combustion engine and runs out without drive. Such a state is given in the free-running state of the electric machine, whereby the efficiency of the electric machine can be determined in a particularly simple manner.
  • a further advantageous embodiment of the invention manifests itself in a computing unit, in particular a controller for an electrical machine, which is set up to carry out a method according to the above statements.
  • Figure la shows a via a freewheel to an internal combustion engine
  • FIG. 1b shows an exemplary profile of the electrical power, the mechanical power and the deceleration torque of an electrical machine as a function of the rotational speed
  • Figure lc shows a schematic representation of the determination of the deceleration torque of an electrical machine according to the prior art
  • Figure 2a shows one with a freewheel to an internal combustion engine
  • FIG. 2b shows a schematic representation of a device according to the invention
  • Figure 2c shows a time course of a phase voltage and the speed derived therefrom
  • Figure 3a shows a time course of a rotational speed of an electric machine and the time course of a rotational speed of an internal combustion engine without load of the electric machine
  • Figure 3b shows the time course of the rotational speed of an electrical
  • Figure 4 shows a schematic representation of the speed characteristics of an electric machine with different load application
  • FIG. 5 shows a chronological comparison of different torques applied to an electrical machine at different loads of the electric machine.
  • FIG. la a well-known from the prior art system of a motor vehicle electrical system 10 and a coupled by means of a freewheeling element 11 to an internal combustion engine 12 electric machine 14 is shown, wherein the electric machine 14, the motor vehicle electrical system 10 feeds with energy.
  • the electric machine 14 is driven by means of a coupling element 16 - typically a belt drive - wherein the coupling element 16 is fixed on the side of the internal combustion engine 12 to a crankshaft 17 and on the side of the electric machine 14 on a provided with the freewheel 11 role.
  • a computing unit 18 in the form of a controller 20 is provided, which adjusts the excitation current IE IT of the electric machine 14 as a function of the voltage of the electrical system 10.
  • FIG. 1b This is illustrated, for example, in FIG. 1b.
  • the electrical power of the electric machine dashed
  • the mechanical power of the electric machine dotted
  • the torque absorption solid line
  • the torque absorption of the electric machine 14 has a local maximum, especially in the speed range around the idling operation about 800 rpm, which makes the range around the idle mode for the internal combustion engine 12 particularly regular. It may happen that the engine control unit 22 is no longer able to regulate the internal combustion engine 12 accordingly, whereby the internal combustion engine can be strangled by a sudden increase in the deceleration torque of the electric machine 14.
  • FIG. 2 shows a method according to the invention for determining a decelerating torque M of an electrical machine on the basis of the electrical machine 114 shown in FIG. 2 a, coupled to a freewheeling element 111 to an internal combustion engine 112, which by means of a coupling element 116 of FIG the internal combustion engine 112 is driven.
  • the combination of electrical machine 114 and internal combustion engine 112, as shown in Figure 2 is similar in many parts of the combination shown in Figure 1, which is why the same reference numerals have been used for identical or similar elements and the function and location of the individual elements is identical.
  • the coupling element 116 is operatively connected to the crankshaft 117 of the internal combustion engine 112 on the engine side.
  • the internal combustion engine 112 outputs the torque in a pulse-like manner to the crankshaft 117 due to the operating cycles of the respective cylinders of the internal combustion engine 112.
  • the pulsed torque output of the internal combustion engine 112 is accompanied by abrasion of the coupling element 116, which is alleviated by the free-wheeling element 111 provided on the electric machine 114.
  • the electric machine 114 also has an arithmetic unit, preferably a regulator 120, which regulates the energy fed to the motor vehicle electrical system 119 by prescribing an excitation current ⁇ ⁇ ⁇ .
  • a communication connection 124 may also be provided (shown in dashed lines).
  • the controller 120 is also provided to perform the method described below for determining the deceleration torque M of the electric machine 114.
  • the deceleration torque M of the electric machine 114 is determined on physical state variables, as described below.
  • the moment of inertia is essentially dependent on the mass and the geometry of the rotor. These variables are basically for each runner, which is installed in an electric machine, readily ascertainable.
  • the moment of inertia of the rotor does not substantially change in a first approximation during operation of the electric machine and can thus be stored as a constant variable, for example in a characteristic field.
  • the torque is generally defined as the time derivative of the angular momentum.
  • the equation of state of all existing in the system of the internal combustion engine 112 and electric machine 114 torques results from the sum of all applied torques, this by given is.
  • the torque of the drive MßkM so the part of the torque of the internal combustion engine 112, which is transmitted via the belt to the electric machine, can not be readily determined.
  • a ripple of the speed arises, in which the electric machine 114 more or less regularly arranged freewheel Phfi phases, which are interrupted by drive phases Phant of the internal combustion engine (see Figure 3).
  • the electric machine 114 is decoupled from the internal combustion engine 112 and the torque equation is simplified accordingly:
  • the electrical machine 114 can determine the respective instantaneous rotational speed via the phase signal 121 applied to the electric machine 114, in particular in the form of a phase voltage 121a or a phase current, by means of the regulator 120, the electric machine 114 or the regulator 120 is set up to perform the Recognize time periods of the freewheel accordingly and to determine the respective deceleration torque of the electric machine 114 from the respective torque curve in the state freewheel PhiFi.
  • the determination of the rotational speed 122 takes place via the phase signal 121 of the electric machine 114 and is shown schematically in FIG. 2c. It is understood, however, that the rotational speed of the electric machine 114 can also be determined in other ways, for example by means of a rotational speed sensor.
  • phase signal 121 is one of the phase voltages 121a of the electrical machine. It goes without saying that in principle any desired phase voltage of one or more phases of the electric machine 114, but also the respective phase currents, can be used in order to determine therefrom the speed signal of the electric machine 114. When using more than one phase voltage, a correspondingly higher temporal resolution of the speed signal can be achieved (not shown).
  • the phase voltage 121a extends in a generator with current output in a first approximation rectangular.
  • An average phase time T phase can be detected at this signal of the phase voltage 121a, which can best be determined on the steep edges of the phase voltage 121a.
  • the generator speed thus results from the formula: where nGen is the rotational speed of the electric machine 114 in revolutions per minute, and PPZ is the pole pair number of the electric machine 114.
  • Pole pair number of the generator The corresponding values of the rotational speed 122 and an average rotational speed 122m, which corresponds to the mean value of the rotational speed 122 within a time interval, are also shown in FIG. 2c as points or as a line.
  • the time interval can in particular be selected such that it is averaged over several oscillations.
  • the speed can preferably be determined digitally.
  • the instantaneous speed ⁇ can be determined digitally.
  • the controller 118 may store a fixed number of rotational speed values in a memory, for example in a shift register (not shown) and at least one maximum within each one oscillation cycle and determine a minimum instantaneous speed.
  • the maximum and minimum instantaneous speeds are preferably the peak speeds in the respectively recorded time range. The difference between these speeds is a measure of the torque output by the engine 112.
  • the rotational speed can be determined on the basis of the rising and falling edges of the phase voltage 121a.
  • any number of rpm values can be detected in the memory, although approximately one complete cycle of a vibration should be recorded for an evaluation.
  • Such a manipulated variable for example, the excitation current ⁇ ⁇ ⁇ -.
  • the load-sensitive behavior of the speed gradient in a freewheeling phase Phfi can thus be used, for example, to detect a freewheeling phase Phfi.
  • the load-sensitive behavior of the rotational speed gradient 122a, 122b in the time range of a falling edge 124 of the rotational speed 122 is significant, in particular in a freewheeling phase Phfi, since in this case the electrical machine is decoupled from the moving masses of the internal combustion engine 112.
  • the freewheeling phase in the electric machine 114 can either be determined as described above, via a change in a manipulated variable influencing the deceleration torque ⁇ ⁇ , or else in other ways.
  • One possibility here is, for example, a determination of the freewheeling phases based on empirical values, in which it is determined whether the freewheel 111 of the electric machine 114 is active when the internal combustion engine 112 is idling. This information can be stored for example in the engine control unit 122 and transmitted via the communication interface 124 to the controller, which can then cause a determination M of the deceleration torque of the electric machine 114.
  • Yet another way to detect the freewheeling phase of the electric machine 114 is a comparison of the current speed of the crankshaft 117 with the current speed of the electric machine 114. Due to the different speeds in the freewheeling phase of the electric machine 114 is also between operations in which the Freewheel 117 is only temporarily active, and operations in which the freewheel is not active, a difference in the speed recognizable.
  • This transmission ratio can be stored as a constant, for example in a map and used for comparison. In a PhiAnt drive phase, the transmission ratio always corresponds to the specified value. However, if the freewheel is active, the quotient of the rotational speed of the electric machine 114 and the internal combustion engine 112 is greater than the stored transmission ratio, which can be concluded that an active freewheel.
  • the average crankshaft speed or the average speed of the internal combustion engine 112 can be provided based on the data of the engine control unit 122 and communicated via the communication link 124 to the controller 120 of the electric machine 114, which determines the respective freewheeling phases PhiFL accordingly.
  • the presence of freewheeling phases PIIFL of the electric machine 114 can also be determined by merely comparing the average rotational speed of the crankshaft 117 of the internal combustion engine 112 with the average rotational speed of the electric machine 114. If the ratio of the speeds is greater than the transmission factorWAN are time shares with an activated freewheel, the freewheeling phases are present at times with decreasing speeds.
  • Another way to detect the presence of free-running phases PIIFL is to set the minimum speed value of the internal combustion engine 112 with the minimum speed value of the electric machine 114 in the ratio.
  • coasting phases in certain operating states of the internal combustion engine e.g. Idling regularly occur.
  • this can infer the presence of freewheeling phases.
  • the freewheeling phases are then again in the time ranges with max. negative speed gradient.
  • the time profile of the rotational speed of the internal combustion engine 112 (solid line) is the rotational speed curve 122a of the electric machine 114 at a first load (dotted line) and the rotational speed curve 122b of the electrical machine 114 at a second load, which is increased in comparison to the first load the electric machine, shown.
  • the deceleration torque of the electric machine 114 can be determined by the gradient of the speed drop in a freewheeling phase PIIFL of the electric machine 114.
  • FIG. 5 shows the rotational speed curve from FIG. 4 with the rotational speed n.sub.km * ÜB of the internal combustion engine 112 and the rotational speed 122a of the electric machine 113 with a first load and the rotational speed 122b of the electric machine 114 with a second load.
  • the corresponding delay moments Mi and M2 (indicated by dotted lines) caused by the electric machine are shown, where Mi is assigned to the lower load and M2 to the higher load.
  • phase signal 121 of the electric machine 114 is shown, with which the respective rotational speed signals are sampled.
  • the number of expected voltage pulses can be stored accordingly, for example in a memory.
  • the number of expected voltage pulses 121a is twelve, since the number of pulses with a transmission ratio of 3 and a pole pair number of 8 and a cylinder number of 4 was determined.
  • this is an arbitrary number, which is essentially dependent on the transmission ratio UB, the pole pair number and the number of cylinders of the internal combustion engine 112.
  • the derivation thereof is in particular the description of Figure 2c) remove.
  • the numerical values given serve to serve the qualitative description of the invention and that there is no compelling restriction to these numerical values.
  • the efficiency ⁇ of the electrical machine 114 can be determined in a very simple way.
  • the electric power P e i can be determined by means of the excitation current I EIT of the rotational speed nGen and of the generator voltage UGen, for example, from a characteristic field or using a model.
  • the efficiency of the electric machine can be determined in a very simple way.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

L'invention concerne un procédé de détermination d'un couple de décélération (M) d'une machine électrique (114) accouplée à un moteur à combustion interne (112) au moyen d'une roue libre (111). Le procédé comporte les étapes consistant à détecter une variation dans le temps de la vitesse de rotation (nGen) de la machine électrique (114), déterminer un état de fonctionnement de la machine électrique (114) présentant des phases de roue libre (PhFI), déterminer le couple de décélération (Mgen) de la machine électrique par évaluation de la variation dans le temps de la vitesse de rotation (nGen) de la machine électrique (114) dans la phase de roue libre (PhFI). L'invention concerne en outre une unité de calcul correspondante (118) qui est conçue pour mettre en œuvre le procédé, ainsi qu'un logiciel correspondant.
EP16820294.3A 2016-02-10 2016-12-27 Détermination d'un couple de décélération d'une machine électrique accouplée à un moteur à combustion interne au moyen d'une roue libre Withdrawn EP3414832A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016201964.3A DE102016201964A1 (de) 2016-02-10 2016-02-10 Ermitteln eines Verzögerungsmoments einer mit einem Freilauf an eine Brennkraftmaschine gekoppelten generatorisch betreibbaren elektrischen Maschine
PCT/EP2016/082684 WO2017137131A1 (fr) 2016-02-10 2016-12-27 Détermination d'un couple de décélération d'une machine électrique accouplée à un moteur à combustion interne au moyen d'une roue libre

Publications (1)

Publication Number Publication Date
EP3414832A1 true EP3414832A1 (fr) 2018-12-19

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EP16820294.3A Withdrawn EP3414832A1 (fr) 2016-02-10 2016-12-27 Détermination d'un couple de décélération d'une machine électrique accouplée à un moteur à combustion interne au moyen d'une roue libre

Country Status (4)

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EP (1) EP3414832A1 (fr)
CN (1) CN108702127A (fr)
DE (1) DE102016201964A1 (fr)
WO (1) WO2017137131A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN109633442A (zh) * 2018-12-27 2019-04-16 新疆金风科技股份有限公司 发电机转速波动的检测方法、装置、设备及存储介质

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
DE10040112B4 (de) 2000-08-17 2015-10-29 Robert Bosch Gmbh Verfahren zur Bestimmung eines Drehmoments einer elektrischen Maschine
JP4449263B2 (ja) * 2001-07-18 2010-04-14 株式会社デンソー 車両用交流発電機
JP2006211734A (ja) * 2005-01-25 2006-08-10 Denso Corp トルク検出装置
JP2007245765A (ja) * 2006-03-13 2007-09-27 Nissan Motor Co Ltd 車両用駆動制御装置
CN102594246A (zh) * 2012-03-02 2012-07-18 北京金自天正智能控制股份有限公司 交流同步电机定转子零频定位控制方法
AT515003B1 (de) * 2013-11-08 2017-05-15 MAN Truck & Bus Österreich AG Verfahren und System zur Überwachung einer Freilaufriemenscheibe

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WO2017137131A1 (fr) 2017-08-17
DE102016201964A1 (de) 2017-08-10
CN108702127A (zh) 2018-10-23

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