Analysis and Comparison of SEPIC, Landsman and Zeta Converters for PV Fed Induction Motor Drive Applications

Conventional Buck, Boost and Buck-Boost converters are not suitable for low and medium voltage Induction Motor (IM) drive applications. Moreover, these DC-DC converters not suitable for power factor correction, constant output voltage and to reduce harmonic distortion. In order to avoid drawbacks of basic DC-DC converters, three advanced DC-DC converters are studied in this article, namely, SEPIC, Zeta and Landsman converters. These converters work as Buck-Boost converters based on load requirement. The P&O MPPT technique is used to track the fast change of solar irradiances by the iterative process. Furthermore, it is used for the soft starting of squirrel cage induction motor. These converters output given to three-phase Voltage Source Inverter (VSI) to run the induction motor drive. The three converters operation is compared for IM drive applications by using MATAB Simulink software.