A power inverter, inverter or invertor is a power electronic device or circuitry that changes direct current to alternating current. The resulting AC frequency obtained depends on the particular device employed. Inverters do the opposite of rectifiers which were originally large electromechanical devices converting AC to DC. A soft starter is an electronic thyristor module for the soft starting of three-phase induction motors. The module replaces the traditional Star-Triangle. Soft starters use electronic components, the size of the starter is very small. Servo System is a self-contained electrical device as a part of closed-loop system uses internal electronics and mechanical gears to provide precise motion in industrial and commercial applications.
