Adaptive Observer for Grid Integrated Solar Powered Motion Sensor Free PMBLdc Motor Drive

Abstract

An adaptive observer-controlled motion sensor-free permanent magnet brushless dc motor drive for solar-powered water pumping is developed here. Developed adaptive observer controls fast photovoltaic dynamics with a robust speed range. Conventional position sensor-free control suffers from starting issues along with commutation error problem in a steady state. Adaptive-observer-based control overcomes those issues using self-correcting algorithm from starting to steady state. Considering intermittency issue of solar power, grid integration is done in present article. An adaptive reference control is implemented here for grid power control. Smart control selection is presented here for generated solar power transfer between BLdc motor, battery, and grid with priority-based power transfer selection. A proof of concept, reliability, and dynamics of implemented control are realized through both analytical analysis and experimental proof in developed commercial product prototypes. Digital signal processor operated cost-effective system is found suitable for target consumers who are ideally gazers.