Process for producing the torque-controlled variable of an asynchronous machine supplied power via a pulse rectifier

摘要

In order to produce the torque-forming controlled variable of a three-phase asynchronous machine, which is connected to a pulse rectifier with a constant intermediate circuit voltage, first for each phase of the asynchronous machine a phase-synchronously keyed, sinusoidal, auxiliary variable is formed. Then, each of the phase currents is multiplied by the auxiliary variable assigned to it. The products are finally added to the torque-forming controlled variable, whereby the stator losses of the asynchronous machine are also taken into consideration.