A New Acceleration Control Scheme for an Inverter-Fed Induction Motor

The new acceleration control scheme aims to give an inverter-fed induction motor excellent dynamic performance by using an on-line inference controller. In every time interval of the control process, the acceleration increments produced by two different voltage vectors are compared, yielding one optimum stator voltage vector that is selected and retained. The on-line inference control is built using a production system and some heuristic knowledge about the relationship between the motor voltage and acceleration. Because integral calculation and motor parameters are not involved, the new controller has no accumulation error of integral, as in the conventional vector control schemes, and it can be used for different induction motors without modification.