Design and performance analysis of novel boost DC-AC converter

The Boost inverters are intended to be used in system like uninterruptible power supply (UPS), where an ac output voltage should be larger than the dc input voltage. Such inverters need more number of switches and two stages of power conversion. This work proposes a novel dc to ac boost based on sinusoidal-pulse-width-modulation (SPWM) control which generates output in single stage and whose peak value can be greater than the dc input one depending on the instantaneous duty cycle. This property is not found in the classical VSI, which produces an ac output voltage always lower than the dc input voltage. The proposed inverter performs single stage power conversion, which minimizes switching losses and attains higher efficiency as compared with conventional boost inverter, in spite of the 35% reduction in the number of switches. This paper describes a new PWM strategy for proposed boost inverter. This modulation strategy reduces the energy loss and harmonics in the proposed inverter. This technique allows the proposed inverter to become a new feasible solution for many applications like PV systems, automotive electronics, solar home applications and other power supply systems.