Direct Field Oriented Controller Applied to Observe Its Advantages over Scalar Control

摘要

There are two widely used amplitude control methods: scalar and vector control [1-3]. Scalar drive allowed the induction machines to be used in variable speed applications conveniently. In fact, today it can still be preferred for some applications. The main reason for this is that it is easy to implement therefore cheap. However, the direct current (DC) machine was mainly used for variable speed applications in the past. Because its torque and flux are naturally decoupled and can be controlled independently by the torque producing current and the flux producing current [4].