Fully Digitized Direct Self-Control System of an AC Motor

The dasic principle of direct self control system is analysed. A mixing type of flux estimator is empolyed at high and low velocities.A kind of improved flux and torque controller is presnted and the corresponding selecting rule of voltage vectors is showed at the same time.It puts forward that the control system by 8098 single chip miciroprocessor is desingned. Simulation and experimental results are showed at the end.