A PRACTICAL VECTOR CONTROL ALGORITHM FOR MU-BASED INDUCTION-MOTOR DRIVES USING A NEW SPACE VECTOR CURRENT CONTROLLER

In this paper, a very simple vector control algorithm is proposed for mu-based induction motor drives. The proposed method controls the moto r torque directly and linearly to achieve instantaneous torque respons e without oscillation. The merits of this control method include its s imple architecture and obviating the coordinate transformation. At the same time, a new space vector-based current controller is proposed to serve as a quick response torque controller of the proposed drive sys tem. In addition to the current error, information on the current erro r derivative is further employed so that one can take more advantages of adding Che zero voltage vector for reducing the switching frequency . As a result, the efficiency can be greatly increased. It is seen tha t through integration of the above two parts, the proposed drive syste m is very simple to implement and has very nice performance.