Schneider Toshiba Inverter Europe Sas

Stefan Capitaneanu

Francois Malrait

Philippe Baudesson

Pierre Rouchon

François Malrait

Fabrice Jadot

Philippe Loizelet

Ludovic Kermarrec

Duro Basic

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;).

Method for determining the inductances of a permanent magnet synchronous machine

A method implemented in a speed controller to detect a loss of one phase, two phases or three phases in a three-phase permanent-magnet synchronous motor, running or stopped at rest, said controller executing a control in closed loop operation, said method including: determining, with the speed controller, a reference flux current as a function of a reference torque current, said reference torque current being calculated from a reference speed applied to the motor and a measurement of the speed or the position carried out on the motor; applying, with the speed controller, the reference flux current and injecting currents over various phases of the motor; and measuring, with the speed controller, the currents over at least two phases and determining the loss of one phase, of two phases or of three phases from these measured currents.

Method for detecting the loss of one or more phases in a permanent-magnet synchronous electric motor

The invention relates to a method of adjusting motor parameters in a variable speed drive intended for controlling a synchronous electric motor with permanent magnets M. The method comprises a step of determining the deviations &#x394;Iand &#x394;Ibetween references and measurements of the flux current and motor torque current, a step of calculating a correction value &#x394;Rof the stator resistance, a correction value &#x394;L of the inductance and a correction value &#x394;Kof the flux constant of the motor, on the basis of the integral terms of the deviations &#x394;Iand &#x394;I, a step of adjusting the values of the parameters of the motor model on the basis of &#x394;R, &#x394;L and &#x394;K, a step of formulating the control voltages Uand Uto be applied to the motor M by using the said adjusted values of the motor parameters.

Method of adjusting parameters of a synchronous motor and variable speed drive using such a method

The present invention relates to a parameterization method for a converter () of the speed controller type, the said converter () being connected to an electrical load () by means of an electrical cable () comprising at least two conductors, the method consisting in:

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Mousseaux Neuville, France

Stefan Capitaneanu