Schneider Toshiba Inverter Europe Sas

Francois Malrait

Thomas Devos

Al Kassem Jebai

Stefan Capitaneanu

Pierre Rouchon

Fabrice Jadot

Rodolphe Sepulchre

Ludovic Kermarrec

Duro Basic

Philippe Martin

Rudolf Fehringer

Mehdi Messaoudi

Alain Dutrey

Michael Hernandez

Quentin Delafontaine

Marc Geneau

Philippe Le Goualec

Patrice Ruault

A method for controlling an electric motor, implemented in a variable speed drive, the variable speed drive being connected to the electric motor through a transformer, the method including; executing an identification sequence of the transformer for determining gain data corresponding to an inverse function of a transfer function of the transformer; generating a transfer module based on said determined gain data; determining a start-up sequence of the electric motor to be implemented by the variable speed drive by executing the transfer module on a reference current path.

Method for controlling an electric motor including an identification sequence of a transformer

A control method for verifying the compatibility between an input filter and a variable speed drive. The method includes applying a plurality of successive commands so as to define a plurality of operating points of the electric motor, for each operating point, measuring the DC voltage of the bus, comparing the maximum variation in the amplitude of the DC voltage measured for the operating point with a threshold value, defining a new operating point as long as the maximum variation in the amplitude of the DC voltage is lower than the threshold value, determining an operating range including all of the operating points for which the maximum variation in the amplitude of the DC voltage is lower than the threshold value.

Control method for verifying the compatibility between a variable speed drive and the input filter

A method for identifying a resistance value (R) of the rotor of an electric induction motor (M), including determining a reference voltage (u) on the basis of a chosen value ({circumflex over (R)}) for the resistance of the rotor of the electric motor, applying a control voltage (u) to the electric motor, the control voltage being determined on the basis of the reference voltage (u), acquiring the values of the currents (i, i, i) measured in the three phases of the electric motor, so as to deduce a stator current (i) of the electric motor therefrom, comparing the obtained stator current (i) with a predetermined value (i), correcting the value ({circumflex over (R)}) used for the resistance (R) of the rotor and applying steps a) to d) until obtaining a stator current (i) equal to the predetermined value.

Method for identifying the electrical resistance of the rotor of an electric motor

A method identifies magnetic saturation parameters of an asynchronous electric motor. The method consists in a monitoring and identification sequence including one or several iterations. The method includes applying at the input of the control law of a reference voltage or a reference flux trajectory or a reference range in order to obtain a magnetization current, building a real profile of magnetic saturation including estimate magnetization flux and measures magnetization current, and determining magnetic saturation parameters corresponding to the real profile already obtained.

Method for identifying magnetic saturation parameters of an asynchronous electric motor

A control method implemented in a variable speed drive for starting a synchronous electric motor, said method including the application, as input, of a reference speed according to a predefined speed profile, the determination of a reference position based on the reference speed that is applied as input, the determination of a voltage in a rotating frame of reference, based on the reference speed that is applied as input, the determination of control voltages to be applied to each output phase depending, on the one hand, on the determined reference position and, on the other hand, on said voltage determined in the rotating frame of reference, and the application of the control voltages to each output phase to obtain an alignment of the position of the rotor of said motor with the reference position.

Control method for starting a synchronous electric motor

A method for controlling an asynchronous electrical motor, implemented in a processing unit associated with a power converter connected to the electrical motor, the method including an identification phase, which includes generating a speed trajectory in input of a control law of the motor in order to make the speed reference take several determined successive values, for each value taken by the speed reference, determining the voltage at the terminals of the electrical motor, for each value taken by the speed reference, determining and storing the flux value for which the voltage at the terminals of the electrical motor is equal to a determined threshold value.

Method for controlling an asynchronous electrical motor

The present invention relates to a control system for an electric charge, said system comprising: &#x2014;A first power converter (VV) and a second power converter (VV) connected in parallel, &#x2014;A first control unit (UC) associated with the first power converter and a second control unit (UC) associated with the second power converter, &#x2014;The second control unit (UC) comprises a main control module (M_) for determining a second output voltage (v&#x3c3;) to apply the electric charge and a secondary control module (M_) to determine a control voltage (&#x394;v&#x3c3;k) to be applied to said second output voltage (v&#x3c3;), said control voltage being determined from the difference between the output current (i&#x3c3;) of the second power converter and the output current (i&#x3c3;) of the first power converter.

System for controlling an electrical load

A display method displays at least one matrix code on a screen of an electronic display device, to send data to electronic equipment including a mechanism reading the matrix code. The display device includes the screen and a mechanism displaying information on the screen. The display method includes: generating at least one two-dimensional matrix code from data to be sent; displaying the matrix code on the screen, matrix codes being displayed successively when plural matrix codes are generated; partitioning a primary image corresponding to a generated matrix code into at least two secondary images, dimensions of the primary image being equal to dimensions of the matrix code and dimensions of the secondary image being smaller than or equal to resolution of the screen, the corresponding matrix code being displayed as secondary images during the display, and the secondary images being displayed successively on the screen.

Method and system for displaying at least one matrix code on a screen to send data to electronic equipment provided with means for reading the matrix code(s)

A control method to be implemented in a power converter, the power converter including an inverter module controlled by a control rule that makes it possible to determine a control voltage to be applied to an electrical load on the basis of a reference control voltage. The control method includes determining a correction value to be applied to the reference control voltage, the correction value being determined from a first filtered voltage obtained by filtering a voltage that is representative of the real measured voltage, and a second filtered voltage obtained by filtering a voltage that is representative of the reference control voltage.

Control method and system for correcting the voltages to be applied to an electrical load

A control method used in a control unit of a power converter, connected by three output phases to a synchronous electric motor, the method being used for starting the motor and including a first step for determining the voltages to be applied to the output phases depending on a reference current, a second step for determining a frequency to be applied to the stator depending on a stator frequency, a step for application of the first step and the second step for a given duration, so as to allow the rotor of the synchronous electric motor to rotate at the stator frequency applied. The method is particularly effective for an architecture including a transformer and a sinus filter between the power converter and the electric motor.

A control method implemented in a power converter including an inverter connected to a synchronous electric motor including permanent magnets, the electric motor being modeled in the power converter by a mathematical model of currents in the electric motor expressing a flux current and a torque current on the basis of magnetic-saturation parameters. The control method identifies magnetic-saturation parameters during a learning procedure including applying a static voltage signal and a high-frequency voltage signal along an axis of the flux and/or an axis of the torque of the motor to cause an oscillation of the current on the axis of the flux and/or on the axis of the torque.

Control method implemented in a power converter and intended for identifying parameters linked to the magnetic saturation of an electric motor

The invention relates to a method of control implemented in a variable speed drive for controlling the deceleration of an electric motor (M) in the case of electrical power outage. The method of control comprises:

Method of control implemented in a variable speed drive for controlling the deceleration of an electric motor in the case of power outage

A control method implemented in a variable speed drive for controlling a lifting load, the load control being carried out according to a first control profile that includes the following: accelerating the load with a view to reaching a first speed, decelerating the load upon receiving a deceleration order, and stopping the load. When the load receives a deceleration order when it is at a current speed lower than the first speed, the method determines a second speed lower than the first speed and higher than the current speed, the second speed having an optimal value for minimizing the load running time until stopping.

Method and device for controlling a lifting load

A method of controlling a multilevel inverter of NPC (Neutral Point Clamped) type. The method includes regulating the electrical potential of the mid-point when the inverter operates at full voltage, that is to say in overmodulation. In this case, the method firstly determines the position of the control voltage vector in one of the six identical triangles covering the hexagonal vector space and thereafter decomposes the control voltage vector in the triangle by taking account of control combinations, defined in this triangle, for the switching arms.

Method of controlling an NPC inverter operating in overmodulation

The invention relates to a control method implemented in a variable speed drive for determining the inductances (Ld, Lq) of a permanent magnet synchronous machine comprising three phases (a, b, c), each oriented along a direction, a stator, and a rotor. For each phase, one after the other, said method includes steps of: applying, along the direction of the phase (a, b, c), a voltage vector (V, V, V) in the positive direction and a voltage vector (V, V, V) in the negative direction for a predetermined duration; measuring the current obtained in the phase after applying the voltage vectors in both directions; determining an angle (&#x3b8;) for the position of the rotor in relation to the stator based on the measured current; and determining the flow (Ld) and torque (Lq) inductances of the machine based on the predetermined angle (&#x3b8;).

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Jouy sur Eure, France

Francois Malrait