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Power Factor Correction in Power Conversion …
AN1106. Power Factor Correction in Power Conversion Applications Using the dsPIC DSC. The low cost and high performance capabilities of the Author: Vinaya Skanda DSC, combined with a wide variety of Power electronic Microchip Technology Inc. peripherals such as an Analog-to-Digital Converter (ADC) and a Pulse Width Modulator (PWM), enable the digital design and development of Power related INTRODUCTION applications to be simpler and easier. Most of the Power Conversion applications consist of an Some advantages of using a digital implementation for AC-to-DC Conversion stage immediately following the PFC are: AC source. The DC output obtained after rectification is subsequently used for further stages. Easy implementation of sophisticated control algorithms Current pulses with high peak amplitude are drawn Flexible software modifications to meet specific from a rectified voltage source with sine wave input and customer needs capacitive filtering.
© 2007 Microchip Technology Inc. DS01106A-page 2 AN1106 FIGURE 1: CURRENT WAVEFORMS WITH AND WITHOUT PFC These waveforms illustrate that …
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