SINGLE PHASE ASYMMETRICAL CASCADED MULTILEVEL INVERTER DESIGN FOR INDUCTION MOTOR

This paper presents a asymmetric cascaded 7 level multilevel inverter using fixed frequency level shifted carrier based pulse width modulation technique. This new control scheme is applied to 7-level asymmetric cascaded inverter design for induction motor load. Different firing angle control schemes in LSCPWM for 7- level asymmetric cascaded multilevel inverter are compared. In asymmetric cascaded MLI by using only 2-H bridges with 8 switches we can get 7 level output voltage where as in symmetric cascaded MLI 7 level output voltage is obtained by using 3-H bridges with 12 switches