standard procedure for a lathe, device for implementation of the procedure and application of the device in lathe

摘要

The procedure provides control of the rotating electrical machine (1) with n phases supplied with alternating current via a voltage oscillator (3) comprising n SPmLL (Single Pole m Logic Level) devices (4). These define mn states (Vi) of the stator phase voltage vector (Vs). The machine has an electromagnetic couple (Tem) and a stator flux (ph-s) controlled by reference values of electromagnetic couple (Temref) and stator flux (ph-sref). For a transitory regime, in which the electromagnetic couple and/or the stator flux are far away from the reference values, a choice is made from the possible values (Vi), of the stator phase voltage (Vs) in order to identify the optimal value to bring these values back towards the reference values. The switching of the SPmLL devices (4) is controlled in a manner corresponding to the state chosen for the stator phase voltage vector.