Digital structure of an autopiloting for asynchronous machine FED by PWM conyertor

In this paper, the authors present a simple but effective digital solution (hardware and software) for control and regulation of converter-fed electric machine. Precisely, a completely digital structure of a command module for an autopiloted asynchronous machine is shown. The machine is fed by a voltage source represented by PWM inverter and operates with variable frequency. An appropriate operation of this system during the different transient states in all four quadrants of the torque speed plane is desired.