Valeo Siemens Eautomotive France Sas

Valeo Systemes De Controle Moteur

Pierre-Alexandre Chauvenet

Boris Bouchez

Bruno Condamin

Luis De Sousa

Antoine Bruyere

Benedicte Silvestre

Wided Zine

Bénédicte Silvestre

A method for determining a direct inductance and a quadrature inductance of an electrical machine is included. The method includes controlling the electrical machine so that a stator generates a first magnetic field rotating at a first rotation frequency to rotationally drive a rotor of the electrical machine, and a second magnetic field that varies periodically at a second frequency for measuring a portion of the phase currents flowing through the stator windings of the electrical machine during controlling of the electrical machine. The method further includes determining an amplitude spectrum of a given electrical quantity determined based on a portion of the phase currents, searching in the amplitude spectrum for a peak present at a frequency that is dependent on the second frequency, determining an amplitude of each peak found, and determining the direct inductance and the quadrature inductance from the amplitudes of two peaks found.

Method for determining a direct-axis inductance and a quadrature-axis inductance of an electric machine, corresponding computer program and device

The purpose of the invention is a method for controlling a three-phase electrical machine from an inverter. Each sector of the complex representation of the space vector modulation being subdivided into three subsectors, comprising a central subsector centred on the active vector, a first lateral subsector associated with the first zero-sequence vector, and a second lateral subsector, opposite the first lateral subsector relative to the central subsector, associated with the second zero-sequence vector, it comprises a step of control of the voltage at the terminals of each phase of the electrical machine, measured relative to neutral, with the value defined by the control vector associated with the subsector in which the control vector is located.

Method for controlling a three-phase electrical machine

The control device includes: a unit for receiving, for a time period, phase voltage setpoints forming a setpoint vector in vector space; a unit for selecting at least N+1 states of the inverter which are associated, respectively, with at least N+1 predetermined vectors (M1 . . . M27) defining a volume in the vector space (Esp) containing the setpoint vector; a unit for controlling the inverter, over the time period, in order to place it successively in the selected states so that it substantially applies, on average over the time period, the phase voltage setpoints. The at least N+1 states of the inverter are selected from among groups of at least N+1 states of the inverter, the at least N+1 states of the inverter of at least one of the groups being associated, respectively, with at least N+1 predetermined vectors (M1 . . . M27), at least N of which are formed by predetermined zero-sum phase voltages and at least one of which is formed by predetermined nonzero-sum phase voltages.

Control device for an inverter

The invention concerns a method for charging an electrical energy storage unit, in particular installed in a vehicle, from a continuous charging terminal, using a DC/DC voltage converter to adapt the voltage between said continuous charging terminal and said electrical energy storage unit, said DC/DC voltage converter comprising at least two interleaved cells operating out of phase, each cell having respective switches; said method comprising control of the switches of said DC/DC voltage converter by pulse width modulation with a duty cycle to adapt the voltage between said continuous charging terminal and the electrical energy storage unit, said duty cycle having a given value &#x3b1;that is substantially constant over several interleaving cycles.

Method for charging an electrical energy storage unit and voltage converter

The battery charger comprises: two output terminals (BS, BS) between which a battery () is designed to be connected; two input terminals (BE, BE) designed to be connected to an electrical network (); two inductors (L., L.) respectively connected to the first input terminal (BE) and to the second input terminal (BE); two switching arms (B, B) for respectively connecting the inductors (L, L) selectively to the first output terminal (BS) and to the second output terminal (BS); a control device () designed for controlling the switching arms (B, B) so as to draw from the electrical network () a mains current (i) in phase with the mains voltage (u). The battery charger further comprises: a smoothing capacitor (C) connected to the second output terminal (BS); and a connection device () for connecting the smoothing capacitor (C) to the second input terminal (BE). The control device () is further designed to control at least the second switching arm (B.sub.C) so as to alternately charge and discharge the smoothing capacitor (C) for smoothing the load current (i).

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Cergy, France

Pierre-Alexandre Chauvenet