Device for controlling the variation of power and / or speed of a load, such as a motor or other.

摘要

The invention relates to a device for varying the power and / or speed of a load (2) such as an asynchronous motor, a synchronous motor, a universal motor or a transformer, an inductor, a capacitor or a resistor, comprising a switch (5) placed on a phase (4) of a single-phase or polyphase AC supply circuit (3), this switch (5) being associated with means managing (6) the cyclic ratio alpha / T or alpha corresponding to the opening and closing time of the circuit by the switch (5) and T the period of the phase (4) on which the latter is placed. BR/ This control device is characterized in that the switch (5) is of bidirectional type MOS transistor, IGBT or bipolar, this switch (5) being associated with means of control of the switching time (9) , of type DRIVER, able to extend the switching time so that it is in a range of between 10 microseconds and 1 millisecond. / P