Abstract: A method of controlling of a polyphase power converter driven by an algorithm of the pulse width modulation type, in which a control parameter comprising a drive setpoint value or a pulse duration associated with a value of drive setpoint of at least one phase, situated in a non-linearity zone of a chart, is modified by modifying the value of said parameter so that it is in a linearity zone of the chart. The control parameter of each of the phases is modified in the same manner.

Abstract: A method of controlling of a polyphase power converter driven by an algorithm of the pulse width modulation type, in which a control parameter comprising a drive setpoint value or a pulse duration associated with a value of drive setpoint of at least one phase, situated in a non-linearity zone of a chart, is modified by modifying the value of said parameter so that it is in a linearity zone of the chart. The control parameter of each of the phases is modified in the same manner.

Abstract: A method for switching the voltage supply for an alternating current electric engine between a supply from an ASD and a supply from an electrical network, the method comprises a stage for determining an ideal speed of rotation for the electric engine and for synchronizing the phase and the amplitude of the voltage delivered by the ASD with the voltage delivered by the electrical network.

Abstract: A method for switching the voltage supply for an alternating current electric engine between a supply from an ASD and a supply from an electrical network, the method comprises a stage for determining an ideal speed of rotation for the electric engine and for synchronising the phase and the amplitude of the voltage delivered by the ASD with the voltage delivered by the electrical network.

Abstract: A method, and a corresponding device, for controlling a power switch in a system with variable structure includes at least a switch capable of being actuated to deliver a given electric signal corresponding to an electric system, based on a control signal taking into account a reference input signal and a feedback signal sampled at the electric system output. The method applies to the control signal an oscillation at a controllable frequency, resulting from the application of a filtering on the feedback signal, the filtering being defined in such a way as to induce a phase shift of −180° between the filtered feedback signal and the electric system input signal, to the controllable frequency.