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The offline SMPS are efficient, lightweight widely used converters in consumer electronics connected to utility mains. Because of high-frequency switching, they produce conducted and radiated EMI also offering low power factor to the utility mains. The two issues involved in the SMPS are to increase the Power Factor and to mitigate the EMI, to comply with EMC standards. Techniques for reducing the...
This paper presents a novel topology of single-phase ac-ac converter with power factor control. The proposed converter can be operated in either buck or boost mode. It is practical, low-cost, and with a minimum number of devices. The control algorithms operate the converter under a wide range of operating output voltage, low harmonic distortion of ac input current and improved power factor. The closed...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
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