Direct Torque Control Based Modelling of Three-phase S3 Inverter for Induction Motor Control

With the increased conversion of solar energy into electricity, the role of design engineers has increased to develop sophisticated, and efficient inverters for converting DC energy from the solar cell. In the field of inverter technology, numerous topologies have been developed in recent times, starting from conventional topologies like cascaded multilevel inverters to advanced hybrid inverters. Each topology has its limitation in terms of the number of voltage sources, switching devices, and other electrical passive components. One of the latest topologies that require a minimum number of power electronic switching components and voltage sources is a single-phase S3 inverter. The topology eliminates the need for filters. A single-phase S3 inverter has been extended to a three-phase S3 inverter to which a three-phase induction motor is connected. The switching pulses of the inverter have been obtained through the direct torque control method. The simulated results of the direct torque control method of the induction motor are presented, thus describing the fruitfulness of this inverter topology.