Three Phase Vsi Inverter Induction Motor Drive

SED 2104                 The V.S.I. (voltage source inverter) drive is one method to obtain the variable frequency voltage to control speed/torque of induction motor .The three phase 'cage induction motor' of fraction HP, is used in this application. In these motors to set up the air gap flux, magnetic current must flow, as lagging the voltage by 1200. The movement of the rotation flux across the conductors induces a voltage in the 'short circuited closed cage' rotor winding, hence causing current flow.