Using feedforward digital control to improve the power quality of a three-channel BCM boost converter for PFC applications

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Using feedforward digital control to improve the power quality of a three-channel BCM boost converter for PFC applications

Ryan, Robert T.; Hayes, John G.; Morrison, Richard J.; Hogan, Diarmuid N.
Date: 2019-03
Copyright: © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Related: https://ieeexplore.ieee.org/document/8722087
Citation: Ryan, R. T., Hayes, J. G., Morrison, R. J. and Hogan, D. N. (2019) 'Using Feedforward Digital Control to Improve the Power Quality of a Three-Channel BCM Boost Converter for PFC Applications', 2019 IEEE Applied Power Electronics Conference and Exposition (APEC), Anaheim, CA, USA, 17-21 March 2019, pp. 1743-1750. doi: 10.1109/APEC.2019.8722087
Published Version: 10.1109/APEC.2019.8722087

Abstract:

This paper proposes a simple and effective digital feedforward algorithm to improve the power quality of a boundary-conduction-mode (BCM) boost converter for power-factor-correction (PFC) applications. BCM boost converters suffer from a zero-crossing distortion of the line current caused by the valley switching of the converter. The feedforward algorithm works by increasing the switch on-time around the zero crossing of the line voltage, which in turn increases the line current at this point. The feedforward algorithm has a very simple design procedure and implementation requiring only a single look-up table (LUT) in microcontroller software. The algorithm is implemented on a 1 kW interleaved 3-channel BCM boost converter which operates with an input rms line voltage of 85 V to 265 V, and an output voltage of 400 V. Experimental results are given for the prototype converter demonstrating a significantly improved power quality, when the feedforward algorithm is used.

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