FS-PTC with Switching Table for Matrix Converter in Induction Motors Drive System

An application of Finite State Predictive Torque Control (FS-PTC) for induction motors fed by matrix converter pays attention to researchers because it has more advantages such as small torque and stator flux, simple and flexible structure, easy implementation. Besides, it also has two main disadvantages. The matrix converter has 27 voltage vectors, which are used in every predictive step. This leads to a relatively large computational burden. The weighting factors selection in the cost function is quite complicated. If weighting factors are not selected correctly, the system will not work well or even become unstable. This paper proposes FS-PTC with switching table structure for induction motors fed by matrix converter. It is a combination of FS-PTC structure and Direct Torque Control (DTC) structure. This structure not only reduces computational burden and eliminate weighting factors selection in the cost function but also it ensures unity power factor and sinusoidal input current.