An Efficient Bridge-Less Power Factor Correction Tapped Inductor based SEPIC converter For BLDC Motor Application

Due to the intensified BLDC motor applications in recent decades, Power factor correction (PFC) converters have attracted several researchers. In previous research works, SEPIC converter with the Tapped Inductor model operating in Discontinuous Conduction Mode (TI-SEPIC-DCM) to produce significant results. This work proposes a novel idea of bridgeless rectifier for PFC to enhance rectifier power density for the BLDC Motor applications. Moreover, due to the introduction of the bridgeless rectifier in TI-SEPIC Converter which operates in DCM, noise emissions are eliminated significantly. A third order harmonic reduction control loop has been proposed for better harmonic mitigation. The proposed work has been simulated in MATLAB and the results are validated for dynamic speed varyng conditions of the BLDC motor. The proposed BL-TI-SEPIC-DCM approach provides significant results with almost unity power factor and minimal THD.