Implementation of Single Stage Converter (Z-Source Inverter) for Induction Motor Supply

Research on power electronics is currently growing, one of those is Z-source inverter (ZSI) as an alternative concept of power conversion to increase voltage without the addition conversion system before being connected to an inverter (single stage converter). The addition of a voltage boost topology on traditional inverter (Voltage Source Inverter) causes considerable power conversion losses that can reduce the efficiency of the inverter. Therefore, a new topology that can directly operate as a boost converter in the inverter input is needed to minimize the losses. ZSI is a development of a Voltage Source Inverter (VSI) by adding a range of impedance sources and using the Maximum Boost Control (MBC) switching process. The switching technique is modified from sinusoidal PWM (SPWM) by adding Shoot Through Zero State conditions. By setting the index modulation (M) value and maximizing the Boost value (B) to reach the voltage increase factor at 3.27 times on the input side. Therefore, the efficiency of the inverter increases 7.79% compared to VSI when given a single-phase induction motor load. So, in this condition single stage converter of Z source inverter is better than traditional inverter (VSI).