Abstract
This paper deals with the boost-buck converter employed solar power based PMSM (Permanent Magnet Synchronous Motor) drive for variable speed compressor of a refrigeration system. A cascaded boost-buck converter is used as a non-inverting DC-DC converter in between solar PV panel and the PMSM drive. An independent control scheme for cascaded boost-buck converter is used to achieve non-inverting output DC bus voltage with maximum power tracking. It allows variable voltage control at PV panel with reduced voltage stress across the boost-buck converter switches under a desired voltage gain and system efficiency. The ZDC (Zero Direct Current) based vector-oriented control is employed for the VSI (Voltage Source Inverter) for speed control of non-salient pole PMSM drive. A DSC (Digital Signal Controller) dSPACE 1104 is used for real time validation. Simulation results are obtained to validate the performance of proposed control algorithms and test results are obtained with a rooftop solar PV panel.
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