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This paper present the speed controller based on fuzzy logic applied to photovoltaic water pumping systems driving by a brushless permanent magnet motor. The study proposed model consists essentially of photovoltaic generator associated to chopper converter controlled by fuzzy logic to ensure the maximum power point tracking. However, in order to have the desired performances, a robust controller is necessary. Through simulation results using MatLab/Simulink show that the performance of speed control then obtained by fuzzy logic depends variation of speed and load.