Renault S.a.s.

Nissan Motor Company Limited

Ampere S.a.s.

Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Abdelmalek Maloum

Ahmed Ketfi-Cherif

Miassa Taleb

Gregory Launay

Ludovic Merienne

Maxime Debert

Pedro Kvieska

Edouard Negre

Mohamad Koteich

Najib Rouhana

Karima Nair

Olivier Scheffges

Malek Ghanes

Mehdi Taherzadeh

Mohamed Hamida

Guillaume Sandou

Koteich Mohamad

Bruno Kvieska

Grégory Launay

Gilles Duc

A control method for controlling the frequency of the input voltage of a DC-DC converter of a bidirectional electrical charger, operating in discharge mode, includes: defining a set voltage value, calculating a control frequency value of the DC-DC converter, obtained by inverting the gain of the DC-DC converter, as a function of an output battery voltage, a set input power, and the set input voltage; finely adjusting the DC bus by increasing/decreasing the frequency, and applying the control frequency thus calculated to the converter.

Method for controlling a DC-DC converter for a two-way electrical storage battery charger

A device estimates the electromagnetic torque of a three-phase synchronous electric machine including permanent magnets. The device includes: a first flux estimator including two integrators of electromotive force for estimating the respective components of the flux in a fixed two-phase coordinate system tied to the stator, an estimator for estimating the torque from the respective estimated-flux components, a second flux estimator that uses currents expressed in a rotating two-phase coordinate system tied to the rotor, with an observer for determining variables that characterize magnetic uncertainties of the machine with a view to correcting the flux estimation of the second estimator, and a detector for generating a signal for resetting initial flux conditions of the two integrators based on the flux estimation delivered by the second estimator, when the discrepancy between the estimated torque and a setpoint torque is higher than a predefined threshold.

Method for estimating the electromagnetic torque of a synchronous electric machine

A method for controlling the input voltage frequency of a DC-DC converter includes defining a setpoint voltage value, computing a control frequency value of the DC-DC converter as a function of the battery voltage, a power setpoint, and the setpoint input voltage, and applying the control frequency to the converter.

Method for controlling the input voltage frequency of a DC-DC converter

A method for controlling the input voltage frequency of a DC-DC converter includes calculating a control frequency value of the DC-DC converter. If the measured voltage is greater than the upper voltage limit, the control frequency corresponds to the minimum control frequency. If the measured voltage is less than the lower voltage limit, the control frequency corresponds to the maximum control frequency. If the measured voltage is between the upper voltage limit and the lower voltage limit, the control frequency corresponds to an average frequency calculated as a function of the difference between the setpoint voltage value and the measured voltage, upper error values and lower error values, and maximum and minimum control frequency values.

Method for controlling the input voltage frequency of a DC-DC convertor

A method controls a boost converter having N switching cells using synchronous pulse width modulation, in which N is a natural integer that does not equal zero. The method includes: measuring input voltages and output voltages of the boost converter; determining an output vector to define a representation of a linear state of the boost converter; calculating the variation in power of the electrical load; determining the N duty factors as a function of the second derivative of the output vector, the derivative of the power of the electrical load, and the ratio between the input voltage and the output voltage that have been measured; and controlling each switching cell of the converter depending on the duty factor that has been determined.

Method for controlling a boost converter having N switching cells

A method estimating position and speed of a rotor of an alternating current machine for a motor vehicle. The method: determines stator currents in a three-phase reference frame and values of stator voltages of the machine in the three-phase reference frame; determines components of the stator currents in a two-phase reference frame depending on the stator currents in the three-phase reference frame by Concordia transformation; determines components of the stator voltages in the two-phase reference frame depending on the stator voltages in the three-phase reference frame by Concordia transformation; iteratively determines rotor speed depending on the stator voltages in the two-phase reference frame and adjustment parameters; determines stator fluxes of the machine in the two-phase reference frame depending on the rotor speed and rejection parameters; and determines rotor position depending on the stator fluxes in the two-phase reference frame, the stator currents in the two-phase reference frame, and equivalent inductance.

Method for estimating the position and speed of the rotor of an alternating current machine for a motor vehicle, and corresponding system

A method estimates a torque of a heat engine in a vehicle hybrid transmission including at least a heat engine and an electric machine together or separately supplying a heat engine torque and heat engine torque intended for wheels of the vehicle. The method uses a measurement of a speed of the heat engine, a value of the heat engine torque reference, and a value of the electric machine torque. The method also sums an estimate of a total torque supplied by the transmission to the wheels and of an estimate of an equivalent resistive torque of the transmission to determine the estimated heat engine torque.

Method for estimating the torque of a heat engine

A method controls an energy equivalence factor of a motor vehicle including a heat engine and at least one electric motor powered by a storage battery. The method includes estimating a value of the energy equivalence factor proportional to a predetermined maximum value when the difference is lower than the threshold value or proportional to a predetermined minimum value when the difference is higher than the threshold value.

Method for controlling an energy equivalence factor for a hybrid motor vehicle

A method for starting a combustion engine fitted to a hybrid or dual-mode motor vehicle includes starting an additional motor upon a setpoint torque demanded by a driver of the vehicle, with a view to accelerating the vehicle beyond a threshold speed at which the combustion engine is driven beyond a stalling speed threshold when the combustion engine is mechanically coupled to wheels of the vehicle.

Method and system for starting a combustion engine

A method controls synchronization of a pinion rotating on a primary shaft driven by a traction machine of a vehicle and rotatably connected to a secondary shaft of a parallel shaft gearbox without synchronization mechanisms. The method includes sending to the traction machine, before coupling of the pinion on the primary shaft, a torque command which depends on a torque signal calculated to minimize a difference between a primary speed and a secondary speed multiplied by a reduction ratio between the primary shaft and the secondary shaft. The calculated torque signal is limited in amplitude when the speed difference is greater in absolute value than a desired accuracy on the targeted primary speed upon completion of the synchronization. The calculated torque signal is saturated on a maximum or minimum torque of the traction machine if the calculated torque signal is not between the maximum or minimum torque.

Method for controlling the synchronisation of a pinion on a gearbox shaft

The invention relates to a method for synchronising the common speed (&#x3c9; p) of two concentric primary shafts () of a hybrid transmission in a hybrid operating mode wherein said two shafts are rotatably connected by a first coupling means (), with the speed (&#x3c9; s) of a secondary transmission shaft () comprising at least one idler pinion for allowing the coupling of one of said pinions () to the shaft () thereof by closing a second coupling means () that does not have mechanical synchronisation bodies, the torque (Te) of the electric machine being temporarily reduced during the synchronisation phase in order to meet the conditions of a perfect coupling when the value thereof caps at an upper limit value (T) or a lower limit value (T).

Method and device for synchronising an idler pinion of a gearbox with the shaft thereof

A method for controlling a permanent magnet synchronous electrical machine powered by a battery delivering a supply voltage to terminals of the battery, the method including: calculating an initial direct voltage component Vdc and an initial quadratic voltage component in a rotating reference; checking a saturation condition; calculating an angle &#x3b1; of a formula; generating voltages to be applied to the electrical machine if &#x3b1; varies negatively and Vdc is positive or if &#x3b1; varies positively and V dc is negative. The method for example can be applied in a control of synchronous electrical machines.

Method for controlling a synchronous electrical machine, corresponding system and motor vehicle comprising the system

A method and system for verifying operation of a motor propulsion plant fitted to an automotive vehicle with electric or hybrid traction, the motor propulsion plant including an electric motor including a permanent-magnet rotor. The method includes: a regulation of currents of a stator and a measurement of direct and quadratic components of the currents; an application, in a model of the electric motor linking control signals to the direct and quadratic components of the currents, of a change of variable in which X=Iq3+Id3, Y=Iq&#x2212;Id; determination of minimum and maximum bounds for X and Y to deduce therefrom minimum and maximum bounds for Iq and Id; and a comparison between the measured direct and quadratic components of the currents and the minimum and maximum bounds for Iq and Id.

Method of verifying the operation of a motor propulsion plant fitted to an automotive vehicle and corresponding system

A method controls a motor vehicle including an internal combustion engine coupled to a first axle set and to at least two electric machines each one coupled to one wheel of a second axle set. The method includes determining the speed of at least one of the electric machines; comparing the determined speed against a threshold; and altering, if the determined speed is above the threshold, the maximum torque of the electric machines so as to limit the rotational speed of the machines.

System and method for controlling a motor vehicle with independent rear electric machines

A system for controlling an automotive vehicle three-phase electric machine supplied via chopped voltages, including: a mechanism determining settings of current of phases of the electric machine as a function of a torque request from a driver; a regulating mechanism to determine voltages of each phase as a function of corresponding settings of current; a mechanism correcting torque oscillations, which can determine powers of each phase, to determine whether speed of rotation of the magnetic field exceeds a threshold value, to carry out a bandpass filtering of the powers, and to determine attenuation currents relating to each phase as a function of the post-filtering powers; subtractors configured to subtract the attenuation currents relating to each phase from the settings of current of the corresponding phases, destined for the regulating mechanism.

Growing community of inventors

Chevilly Larue, France

Abdelmalek Maloum