Direct-torque control of a PMSM using four-switch three-phase inverter

This paper presents the direct-torque control of a permanent magnet synchronous motor using four-switch three-phase inverter. The control of the four-switch inverter was developed based upon the orientation of four-switch space-vectors in the plane of six-switch inverter. The proposed inverter was successfully used in the direct-torque control of a PMSM. A dynamic model of a machine gives deep insight for designing the efficient control scheme for its control. A model based estimator was used for the sensing of currents. The control scheme was implemented using TMS320F2812 and TMS320F28835, and the results have been presented for the demonstration of efficient control of PMSMs using four-switch inverters.