An FPGA-based Fully Digital Controller for Boost PFC Converter

Abstract

This paper introduces a novel digital one cycle control (DOCC) boost power factor correction (PFC) converter. The proposed PFC converter realizes the FPGA-based DOCC control approach for single-phase PFC rectifiers without input voltage sensing or a complicated two-loop compensation design. It can also achieve a high power factor and the operation of low harmonic input current ingredients over universal loads in continuous conduction mode. The trailing triangle modulation adopted in this approach makes the acquisition of the average input current an easy process. The controller implementation is based on a boost topology power circuit with low speed, low-resolution A/D converters, and economical FPGA development board. Experimental results demonstrate that the proposed PFC rectifier can obtain a PF value of up to 0.999 and a minimum THD of at least 1.9% using a 120 W prototype.

Implementation of Non-Linear Controller for Contemporary DC-DC Converter

“…The performance of the converter using PDI plus LQR controllers is estimated using MATLAB/Simulink as well as experimental. The results are presented and analyzed by applying digital control scheme to achieve current in continuous conduction mode (CCM) and calculation of duty cycle control in different ranges, several cases digital OCC approaches have been done but in this there is an imitating the integration part ,accumulator is used, calculate few samples of input current to get the average input current value for that we need fast and high resolution A/D converter, control every value of duty cycle has been reported [18]. From the above problems are solved by designed LQR plus FLC for FNSLLC.…”