Improved One-cycle Control for Realizing AC/DC Power Factor Correction Boost Converter

Abstract

In this paper, an improved one-cycle control is proposed for an AC/DC boost converter with power factor correction (PFC) using logic and analogy circuits. The proposed improved onecycle control method realizes features that are similar to those of the conventional one-cycle method without using a sense input voltage and a multiplier. It can also promote the stability of the converter. The adjustable maximum duty cycle limit of the converter is designed to limit the maximum duty cycle by adopting the logic and analogy circuits. According to the analysis of the modified one-cycle control method, the suitable circuit component parameters of the converter can be designed for the one-cycle control AC/DC PFC boost converter. Finally, a modified one-cycle control AC/DC PFC boost converter with input ACs of 90, 110, 220, and 260 V, an output DC of 400 V, and an output power of 500 W was built to verify the accuracy and feasibility of its performance.

Improved and accurate low‐frequency average modelling and control of a conventional power factor correction boost converter in continuous conduction mode

“…First, the open-loop crossover frequency of the compensated loop must be less than one third of the ac grid frequency, 10 Hz being a fair choice. Fast dynamic response without high overshoot in the dc-link voltage can be obtained if Within this context, an integral control action ensures that the steady-state error regarding the dc-link voltage will be as low as possible, while the proportional action provides fast dynamic response [28]. Capacitive filtering is also employed in this case, which mitigates high-frequency noise and minimizes dc-link voltage overshoot during transients.…”

“…Within this context, an integral control action ensures that the steady‐state error regarding the dc‐link voltage will be as low as possible, while the proportional action provides fast dynamic response [28]. Capacitive filtering is also employed in this case, which mitigates high‐frequency noise and minimizes dc‐link voltage overshoot during transients.…”

“…For this purpose, Equation ( 26) must be considered, which results in Equation ( 27) after some algebra. Also in this case, if the filter capacitor ESR is supposed to be considered in a particular application, such transfer function can be modified to reflect its influence as in Equation (28).…”