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Home > Archives > Volume 20, No 8 (2022) > Article

DOI: 10.14704/nq.2022.20.8.NQ44667

Performance Evaluation of DC-DC Converter Using Fuzzy PID Controller for LED Lighting Applications

MuthuvelV, AnanthamoorthyNP, ManikandanBV, MarikkannanA

Abstract

A high-power white LED (HPWLED) is widely considered the future trend in lighting, because of its high reliability, efficiency, and other exceptional features, including shock/vibration resistance, chromatic variability, etc. A boost converter has some limitations when driving a long LED string, despite being able to match each LED's current perfectly. A high duty cycle and a low efficiency are the two most significant drawbacks of these systems. Due to this, new power supplies are needed to boost and make use of their respective characteristics. This paper proposes a Fuzzy Proportional-Integral-Derivative (FuzzyPID) controller-based transformer-less DC-DC high voltage gain converter drive to regulate the luminosity of the HPWLED string. The transformer-less DC-DC high voltage gain converter is used here as a driver for HPWLED strings due to its high voltage gain with a small duty ratio. Here, the Fuzzy PID controller provides robust and highly efficient luminous control for the HPWLED without any chance of exceeding the safe current limit of individual high-power LEDs. Controller performance is analyzed and validated with a traditional PID controller. Simulation works are using a Matlab/Simulink environment. Also, to ascertain the supremacy of the suggested controller for the HPWLED string, a hardware prototype is fabricated for a suitably scaled-down wattage rating incorporating ARDUINO Mega 2560 microcontroller.

Keywords

DC-DC converter, Luminous regulator, High power white LED (HPWLED), Proportional integral controller, Fuzzy logic controller, Fuzzy PID controller.

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