Shielded Capacitive Power Transmission (S-CPT) System Using Cast Iron

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

This paper presents an investigation into a shielded capacitive power transfer (S-CPT) system that repurposes existing cast iron road covers as electrodes for dynamic wireless charging of electric vehicles. The study addresses a novel research topic with strong relevance to practical engineering applications, demonstrating considerable innovation and promising application potential. To further improve the manuscript, the following aspects require refinement:

 

      1.The abstract exceeds recommended length and should be condensed to emphasize the research questions, methodology, key results, and conclusions.

2. The introduction could be more concise by reducing the extensive background information. Additionally, the research gap should be explicitly stated earlier in the section to better frame the study's contribution and originality.
3. The introduction highlights the resource and cost limitations of IPT but omits discussion of CPT's own constraints in high-power applications—such as those encountered in heavy-duty electric vehicle charging.
4. The justification for selecting 13.56 MHz should be strengthened by explicitly noting its designation as an ISM band frequency, alignment with international standards, and benefits in component availability and EMI control. Additionally, the chosen electrode sizes require further support through simulation or theoretical analysis—such as evaluating their impact on coupling capacitance, field distribution, or misalignment tolerance.
5. In the comparative study of surface treatments, quantitative data—such as coating thickness and surface roughness (Ra values)—should be provided to ensure meaningful comparability.
6. Figure 4, which presents the coupling capacitance curves, should include error bars to indicate the variability of the measured data. The addition of uncertainty intervals, derived from repeated measurements, would improve the reliability and reproducibility of the experimental results.
7. The figures are not sufficiently referenced or discussed in the main text. It is recommended to strengthen the correspondence between the textual descriptions and the figures to improve clarity and support interpretation.
8. The topology of the matching circuit (e.g., L-type, π-type, or T-network) used in the power transmission experiment has not been specified. It is recommended to include a detailed description or schematic of the matching network to ensure reproducibility and clarity of the experimental setup.
9. The structural analysis presented in Figure 8 should include a detailed description of the simulation setup—specifically, the applied loading conditions, boundary constraints, and material constitutive models used in the finite element analysis. Providing these specifics is essential to validate the mechanical reliability of the design and ensure the reproducibility of the results.
10. The convergence criterion in Figure 6 (e.g., capacitance variation threshold) should be quantitatively defined. Supplementing error bars or statistical intervals would strengthen the validity of the comparative results.

Author Response

Please see the attached file.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

A proposal entitled 'Wireless Power Transfer for Electric Vehicles Using Cast-Iron Structures as Electrodes in an S-CPT System' has been submitted. Having carefully read the proposed article, the following considerations arise:

The proposal is interesting as it provides a detailed analysis of the use of cast-iron structures as electrodes in an S-CPT system. I enjoyed reading it and have the following observations:

1. On page 8, line 299, it would be helpful to indicate that Zo = 50 ohms is a global standard, especially used in data transmission and wireless communications.

2.- Equations (1) and (2) are well-known, but it is important to include the reference from which they were taken. The minimum development of equations (3) and (4) should be included, as should the equivalent circuit shown in Fig. 3b.

3.- It is suggested that an image showing the electrode dimensions be included.

4.- For the value of RL and L1 in Fig. 9, it would be more appropriate to calculate them based on an electrical analysis where an input impedance of 50 ohms is conditioned with a desired load value.

5.- In Fig. 12a, what is the purpose of the integrator? Was a resonant circuit used? If so, where is the inductor involved?

Finally, it is recommended that the title reflects the main topic of the research: 'Shielded capacitive power transmission (S-CPT) system using cast iron'.

Author Response

Please see the attached file.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The present manuscript demonstrates substantial improvements relative to the previous version, with all of the previously identified issues having been effectively addressed. To further enhance the overall quality, the following areas warrant additional refinement.

 

1) It is recommended that a thorough English proofreading be conducted to correct minor grammatical and spelling errors.

 

2) Ensure that all professional terminology is used consistently throughout the text.

 

3) Some long sentences may be appropriately divided to enhance clarity and fluency of expression.

Author Response

Please see the attachment.

Author Response File: Author Response.docx