A new variable frequency inverted sine carrier PWM modulated semi-cross switched multilevel inverter topologies

To take out a variable frequency variable amplitude output voltage a new single-phase H-bridge multilevel inverter (MLI) topology is constructed through VFISCPWM modulated semi-cross switched voltage sources along with a hybrid pulse width modulation (PWM) strategy. The principle avoids a shrewd attitude to employ PWM approach only for a meticulous H bridge that serves to produce the desired level while the remaining add-on modules function with the theory of basic switching. The use of reduced number of switching devices involves for a precise number of output voltage levels in comparison with conservative MLIs. The design of the hybrid PWM appropriate to power the suitable switches add strength to its formulation in the sense it requires only either addition or subtraction to generate the square wave modulated pulses for the power devices in the other units other than that responsible for offering the preferred level of output voltage. Simulation results are obtained from MATLAB SIMULINK environment and validated predict the emergence of a novel variety of MLIs and falsify a diverse dimension for inverter interfaces in power control applications.