Schneider Toshiba Inverter Europe Sas

Ludovic Kermarrec

Francois Malrait

François Malrait

Stefan Capitaneanu

Fabrice Jadot

Stéfan Capitaneanu

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 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.

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Evreux, France

Ludovic Kermarrec