Fuzzy Logic Control Design and Implementation with DC-DC Boost Converter

Abstract

Being an electrical switch, this converter transforms an uncontrolled input DC voltage into a regulated one to get a desired output voltage. The MOSFET works in the circuit boost-converter as an electronic switch that closes and opens several times. The current passing through the inductor determines the modes operation of the boost-converter circuit. We proposed the new fuzzy control circuit (maximum power point (MPP) circuit using Fuzzy Logic Control (FLC) algorithm) was designed after replacing the DC source with a photovoltaic (PV) array and the duty cycle (constant) with the FLC and keeping the circuit components same except for the Pulses Width Modulation (PWM) of frequency 3800 Hz. In the full circuit, they controlled the MPP of the PV array through a boost converter and FLC., the relationship between the power and voltage of the PV array was drawn to access the MPP at fixed constant solar irradiance and temperature. The value of the solar irradiance altered during the day from low (in the morning) to high (with a peak at the noon) before being reduced to very low at the sunset. The proves that the FLC algorithm works efficiently to make the power of the PV cell always at the maximum value (MPP). The stability of the PV cell voltage and its current change also proves that it operates according to the specifications of the P-V and I-V characteristics of the PV cell referred to earlier the output voltage was increased because we used a step-up converter (boost converter with FLC). The achievement system is showed to be efficient and robust in improving solar charging and rectifying capacity.