Abstract: A method for controlling a three-phase electric machine by a control unit operatively connected to a controller, to a sensor, and to an inverter includes: a first acquisition phase, wherein the control unit receives, from the controller, a first signal representative of a reference torque; a second acquisition phase, wherein the control unit receives, from the sensor, at least one further signal representative or one or more of the following quantities: an electric quantity of the inverter, an electric quantity of the three-phase electric machine, and a mechanical quantity of the three-phase electric machine; a control phase, wherein the control unit generates a control signal that it inputted to the inverter for generating an effective torque of the three-phase electric machine, wherein the control signal is determined on the basis of a reference stator voltage, wherein the reference stator voltage is determined by the control unit as a function of a reference amplitude value and a reference load angle value

Abstract: The switching cell (1), comprises, between the terminals of a supply source (2) supplying a voltage (VC), a controlled power switch (T) and a current recirculation device (CRD) including a diode or a junction, between which there is defined a common terminal (O) of the cell (1). Across the current recirculation device (CRD) there are connected controlled electric charge supply means (TL, VL, DL; TH, VH, DH) comprising a first generator circuit (TL, VL, DL) for generating a low voltage, including a first d.c. voltage source (VL), an associated first controlled switch (TL), and a first diode (DL), and adapted to supply an electric charge sufficient to cause the reverse-recovery of the current recirculation device (CRD); and a second generator circuit (TH, VH, DH) for generating a higher voltage, including a second d.c.