Comparison on Performance between PI and Fuzzy Controlled Zeta Converter in BLDC Motor Drive

Due to high efficiency, silent operation, compact size, high reliability, ease of control, and low maintenance requirements the brushless DC motor (BLDCM) drives are being employed in many variable speed applications. This paper present a comprehensive analysis of power factor correction (PFC) zeta converter fed brushless dc motor drive with PI and fuzzy controller. The brushless dc motor drives have poor power factor and power quality problems at input AC mains as they are mostly fed through diode bridge rectifier based voltage source inverters. In this work, the speed of the BLDC motor is controlled by adjusting the dc link voltage of the voltage source inverter (VSI) feeding a BLDC motor. This thesis deals with the implementation of pulse width modulated Zeta converter with better efficiency, lower total harmonic distortion factor and power factor correction. The proposed drive is implemented to achieve a unity power factor at ac mains for a wide range of speed control and supply voltage fluctuations. A MATLAB/ Simulink environment is used to simulate the model to achieve a wide range of speed control with improved PQ (Power Quality) at the supply.