Design and Implementation of a Single-Stage PFC Active-Clamp Flyback Converter with Dual Transformers

Round 1

Reviewer 1 Report

The authors have presented their design on a flyback converter. Please review my concerns that are given below. 

1. The paper introduction is good  but i dont find it useful to compare ref 26 and 27 simultaneously. Please remove one of them and add some other work like https://doi.org/10.3390/electronics10151761
2. The figure axis are not clear and difficult to read. 
3. Please reproduce Fig. 11 as i am unable to understand it. Also scan the curve for full range of duty cycle. 
4. Please include the charts for the switch utilization ratio and switch stress for the proposed as well as the benchmark methods. 
5. What are the applications of this converter ?
6. Please give information about the power loss calculations and real value of ESR and equivalent resistance of switches in ON states.
7.  Please provide a clear graph of gain of this converter. 

Author Response

Thank you for the reviewing to make this paper better. We have followed the suggestions from the reviewer. Please review the revised content. Thank you very much. 

Author Response File: Author Response.pdf

Reviewer 2 Report

The converter efficiency seems to be low.

I suggest to make a comparison between the proposed converter and the structures presented in Table 1, in terms of efficiency.

Also, some simulation results, in steady state and transient regimes (including the control loops), compared with experiments, can improve the paper quality.

Author Response

Thank you for the reviewing to make this paper better. We have followed the suggestions from the reviewer. Please review the revised content. Thank you very much. 

Author Response File: Author Response.pdf

Reviewer 3 Report

The manuscript, Design and Implementation of a Single-Stage PFC Active-Clamp Flyback Converter with Dual Transformers, AC/DC single-stage structure by integrating a boost topology and an active clamp flyback (ACF) circuit with power-factor-correction (PFC) function. The authors controlled a boost PFC topology operated in the discontinuous to achieve the PFC function. With the coordination of active clamping components, a resonant technique is obtained and zero-voltage-switching (ZVS) can be achieved. Finally, the authors demonstrated a prototype converter with AC 110V input and DC 19V/6.32A output under 300 kHz switching frequency, with 88.2%  efficiency and 0.984 power factor in full load condition. Overall, the major conclusions of this manuscript are quite obvious and supported by both the experiment and test results. Besides, validation and analysis were completed diligently. As such, I recommend the manuscript can be accepted.

Author Response

Dear reviewer, thank you so much for your time for providing good suggestions and reviewing the paper.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Thank you for incorporating my comments.