Abstract
Harmonics are the by-products of modern electronics devices so it is necessary to mitigate the harmoni cs and offer techniques to mitigation of harmonics. It is greatly hampered by a three phase rectifier use d as a front-end ac-to-dc converter in many systems. High power factor is achieved by injecting high-frequenc y currents into the three-phase rectifier. This study presents the high power factor operation of the co nverter with reduced total harmonic distortion up to 47.06% . The power quality up gradation is due to highfrequency current injection, at the input of the fr ont-end rectifier. Sinusoidal PWM technique is used for controlling the output voltage. DSP is used for gen erating the desired gate pulses. The converter has high efficiency, low EMI emissions, high power packing density and suitable for UPS system.
Highlights
Common Coupling (PCC) and cause excessive heating in the system (Suryawanshi et al, 2012)
Harmonics are the by-products of modern electronics devices so it is necessary to mitigate the harmonics and offer techniques to mitigation of harmonics
This study presents the high power factor operation of the converter with reduced total harmonic distortion up to 47.06%
Summary
Common Coupling (PCC) and cause excessive heating in the system (Suryawanshi et al, 2012). Most electronic equipment does not draw their current regulations on line current harmonics have made power from the supply as a smooth Sinusoidal waveform. Several active power ac to- dc converters are presented in Chandrasekar, T. et al / American Journal of Applied Sciences 11 (4): 564-569, 2014 It consists of three-phase input line bridge rectifier (D1D6) with Power Factor Correction (PFC) circuit, a halfbridge inverter with two primary switches (Sm1-Sm2) and two secondary switches (Sa1-Sa2) and LR-CR resonant circuit. The diodes of the rectifier, primary and secondary switches of halfbridge inverter operate at ZVT and ZCT. Computer simulation is carried out for 3 kW, operating at a switching frequency of 50 kHz
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