Schneider Electric Sa

Hubert Cornilleau

Vinh Tung Nguyen Phuoc

Antonio Almeida

Jean-Louis Chouffier

Pascal Duclos

Lucien Perrin

A method for the control of a load, such as a motor, by means of a start-up controller (1) connected, on the one hand, to a fixed frequency alternating supply, and, on the other hand, to the motor, and including static switches associated with at least one phase of the motor and operated by a control circuit (2), characterized in that the electromagnetic torque (C.sub.m) of the motor is automatically controlled to a variable reference value (C.sub.cons) in the start-up or deceleration stage of the motor.

Control method for a start-up control unit and an apparatus to make use

An asynchronous motor is supplied with power from an AC line voltage via a variable speed drive including a rectifier bridge connected to the AC line voltage, a DC voltage intermediate circuit including a capacitor and an inverter including switches and connected to the phase windings of the motor. A system for controlling the power supply to the motor includes a device for controlled resumption of motor speed after supply of power to the motor is interrupted.

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Verneuil sur Seine, France

Hubert Cornilleau