The development and industrialization of a simple single microprocessor field oriented controller

The development and industrialization of a field oriented controller for an induction machine are described. It has been implemented using a single microcontroller, thereby reducing the initial development cost as well as the manufacturing cost. Real-time estimation of the rotor flux linkage vector components has been implemented using a simulation model for an inverter fed induction machine. A further saving was introduced by making use of a nonlinear stator current controller implemented in hardware. Because the field orientation strategy was implemented in a stationary reference frame, multiple transformations between the three-phase and synchronous reference frame normally associated with field-oriented controllers were avoided. This resulted in a considerable saving in execution time