Wireless Power Transfer System Model Reduction with Split Frequency Matching
Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsThis paper focuses on the model simplification of wireless power transmission (WPT) systems. In order to simplify the analysis and design of power control, phase synchronization and maximum efficiency tracking, the authors propose a model simplification method based on split-frequency matching. This method achieves split-frequency matching by means of a pair of conjugate equivalent mutual inductances that are derived from the asymmetric properties of the full-order dynamic phasor model in the positive and negative frequency domains. The model retains the advantages of existing models under strong coupling conditions while significantly improving the accuracy.
1. The context in which the methodology is applied should be described.
2. Increase in physical photographs of system platforms.
3. A coupling coefficient of 0.1 is not considered strong coupling and a set of experiments with higher coupling coefficients can be added.
4. A comparative analysis of the article's methodology with the current state of the art at home and abroad should be added.
Comments on the Quality of English LanguageEnglish expression needs further improvement.
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for Authorsline 30-32, text is confusing;
page 2 - can coupling coefficient of 0.1 be considered as strong coupling ? Pleae define this in the manuscript,
Line 81 to 82, "The reason is known as the eigenvalues of the coupled resonators drift with the increase of k" please explain whats is the meaning of this
fig. 1 - why do you use 2 sources to develop your method, and to explain split frequency ? What is the relation os split phenomenom and the use of 2 sources?
Line 91 to 93 - please explain what do you mean by assumin the current as an output
It is not clear how you derived eq. (10) and (11) from (9),
Line 144, 145 - pleae explain the meaning of this " The dynamic phasor model focuses on the signal magnitude and phase, which are low frequency characteristics..." What parameter is low frequency here??
Chapter 4 - you mentioned phase, however in chapter 3, where you present the dynamic phasor you didnt mention phase,
equations (26) and (27) - are there references to these, or do you developed they here? If so, it is not clear how,
Chapter 6 - Why do you use such a small gage wires (AWG 64)? Can theses be uses in EV applications (the focus here)?
Chapter 6 - You mentioned a low power experiment, however the power transferred is 100 W ; what is the definition of low power here? You mentioned ZVS for the first time here, how did you achieved ZVS?
CHapter 6 - The titles of sections A and B are the same (Large signal-characteristics)
Fig. 11 - what references are used for the existing models? How are they used? The experiment matches the proposed model here?
Comments on the Quality of English Language
Please review;
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
Comments and Suggestions for AuthorsThe authors propose a new dynamic phasor-based model reduction technique with split frequency matching for wireless power transfer. This work is interesting and holds promise. However, I believe the manuscript needs further investigation and refinement to improve its overall quality.
1. What is the metric used to define loose and strong coupling conditions?
2. In Figures 4 and 7, the authors only consider the condition 𝑘=0.1. I am wondering how a higher 𝑘 value would impact the Bode diagrams.
3. In the experimental section, the authors listed the nominal operating parameters of the system in Table 1. Please provide more details about how these parameters, such as the quality factor 𝑄1,2 and the coupling coefficient 𝑘, are determined. Specifically for the coupling coefficient 𝑘, many factors can significantly impact its value, such as power transfer distance, coil configurations, and resonance frequency. Please explain how the value of 𝑘=0.1 was set.
4. The titles “A. Large-Signal Characteristics” (Line 249 on page 13) and “B. Large-Signal Characteristics” (Line 273 on page 14) are the same. Please check that.
5. As shown in Figures 11 and 12, under all tested operating conditions, the proposed reduced-order model and the original dynamic phasor model matched the experimental results well. What is the advantage of the proposed reduced-order model compared to the original dynamic phasor model?
Given the points raised, it is advisable to conduct a revision of the manuscript before considering it for publication.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
Comments and Suggestions for AuthorsThe authors have answered all my questions
Reviewer 3 Report
Comments and Suggestions for AuthorsThe authors have addressed my concerns. I recommend the revised manuscript for publication.
