In order to maximize the efficiency of an SPV array and accomplish soft starting of apermanent magnet blushless DC motor, this study deals with a buck-boostconverter driven solar photovoltaic array fed water pumping . Current sensors, which are typically used to regulate the speed of BLDC motor, are entirely removed. A voltage-source inverter's changing DC-link voltage controls the BLDC motor's speed (VSI). This study examines how the interleaved DC-DC converter, which serves as a transitional DC-DC converter between the solar PV array and soft starting of BLDC motors, operates in a solar PV array fed water pumping system. The output ripple current of the intermediate region for recording maximum power (MPPT). In this project, the speed of a brushless DC motor has been managed by utilizing a variety of control approaches, including PI, Fuzzy and PSO optimization techniques. To get the most efficiency out of the solar array, the system is powered by a solar PV array and the MPPT technology.