Experimental Results and Analysis of Midrange Underwater Asymmetric Wireless Power Transfer
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsKindly read the attached file, thank you.
Comments for author File: 
Comments.pdf
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsThis article has addressed the transfer efficiency issue of Underwater Wireless Power Transfer (UWPT) systems. The major limitations of the article are listed as:
1. The abstract does not provide (1) the motivation behind the target research problem (transfer efficiency issue in an Underwater Wireless Power Transfer framework), (2) the limitation(s) or shortcoming(s) of existing UWPT approaches and techniques (research gap) (3) the main feature of the proposed approach that will address the shortcoming(s) of existing solutions (4) what has been achieved with the proposed work in terms of outcomes (5) what is the significance of achieved outcomes in terms of certain performance attributes
2. The problem statement in the Introduction is not clearly articulated. The challenges associated with the UWPT systems, particularly related to transfer efficiency, must be described.
3. The research gap in the Introduction (summary of the state of the art as well as their limitations) is not presented. It includes the description of “what has been achieved so far” for the improvement of transfer efficiency in a UWTP system and “what are the major shortcomings of existing solutions. Is there any existing circuit model for the target problem? If no, then why a circuit model is needed?
4. The major steps of the proposed solution are not briefly summarized in the Introduction. Furthermore, it is not clear in the Introduction how the proposed work is going to address the identified research gap. Moreover, no information about the validation is present in the Introduction section. Achieved results and significance are not mentioned in the Introduction.
5. A background section is also missing where authors may provide the essential knowledge to understand the working of the proposed framework. This section may include a block diagram of asymmetric UWPT system. Moreover, the terminologies like balancing resistance, impedance, mutual inductance load voltages, transfer efficiency, eddy currents, range, transfer distance in the context of a asymmetric UWPT system
6. Related work has not been analyzed properly to establish the novelty of this work. Various compensation technologies have been used in the literature (static a well as dynamic). Static technologies are further classified as basic/composite topologies. On the other hand, the dynamic technologies rely either on the switching of resonant element or adjusting the controlled reactors. A comprehensive comparison of the proposed work with state of the art is clearly missing.
7. The design details have been mixed with the implementation details. First, the main contribution (circuit model) must be presented in terms of structure and behavior. Currently, the structure and behavior of the proposed circuit model has many flaws from a presentation point of view. The magnetic resonance principle for power transmission should be clearly explained.
8. The proposed circuit model must be validated with experimental results.
9. Results section must be improved. The proposed work must present the results for various power levels with transmission efficiency.
10. Performance comparison has not been made with recent works.
11. There should be a discussion section to explicitly describe how the proposed UWPT system has addressed the issues of electromagnetic wave attenuation, irregular seawater current interference, and underwater wireless energy transfer.
12. The limitations of the work such as the limited transmission distance, core loss and metal eddy current must be discussed.
13. The title suggests that the proposed technique is targeting midrange. However, the definition of midrange provided by the authors requires more explanation. The motivation behind this selection should be justified.
14. It is not clear that how the proposed approach is asymmetric. The results have not been compared with a symmetric approach.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Comments and Suggestions for AuthorsI would like to thank authors for the time to give explanations to my questions.
Reviewer 2 Report
Comments and Suggestions for AuthorsThe authors addressed all the concerns. The paper can be accepted.
