A MICROCOMPUTER-BASED VECTOR CONTROLLED INDUCTION-MOTOR DRIVE

In this paper, first, the conventional rotor field orientation vector control method is modified to achieve a simple architecture which obvi ates the generation of the unit vector and the time varying coordinate transformation such that even a low cost 8 bit microcomputer can be u sed for implementation. Second, a new current inverter is proposed to effectively coordinate with the proposed vector control algorithm. It has very nice tracking performance and lower switching frequency. As a result of this integration, the involved computation is much reduced and the efficiency can be greatly increased. Finally, a prototype syst em is implemented using a low cost signal chip microcomputer. some sim ulation and experimental results are also given in the context.