Efficiency Evaluation of Electric Bicycle Power Transmission Systems
Round 1
Reviewer 1 Report
The paper reports a method to estimate the efficiency of a electric power train system.
- The list of references could be improved with up to date related works
- In the same direction, the results should be compared with previous and pertinent works.
- The authors say they propose a computational method, however, they only a physics based model.
- The results must be critically analyzed
- Can the authors explain why there are so discrepant error values?
- The figure captions should be more descriptive, so that the figure can be easily understood.
- The authors should provide an improved discussion regarding the results.
Author Response
Please see the attachment.
Author Response File: 
Author Response.docx
Reviewer 2 Report
The topic is interesting and this paper is ambitious with a strong desire to consider important aspects in the field of electric bicycles. This paper is presents a computational method for estimating the efficiency of electric bicycle power train systems. The content of the manuscript is good. However, the paper requires revisions before it can be accepted.
- Authors should cover the latest findings in area where the contribution was done; a thorough and recent literature review is needed, so that we can see what is the improvement compared to existing works. The references used are not sufficient.
- Clear representation of block diagram and the control strategy used must be addressed. It is not clear how the controller is designed and how is working. I suggest rewriting the section showing that to be easier for the reader to understand the control model in the design.
- Cost should be an important index to be considered. Is the cost considered as minor problem? If agree, please comprehensively evaluate the system performance in terms of cost.
- This manuscript should analyzes in detail the function of various torques of the motor in the electric bicycle.
- How the batteries considered in your design? When the motor is driven in the discharge mode, will various torques of the motor have any beneficial or adverse effects on the discharge process of the battery?
- How the internal motor power losses and battery efficiency considered in the proposed method? Please specify the whole assumptions used in the implantation process.
- Please highlight the technical specifications of the different components including the motor type and motor driver.
- The conclusion should concisely conclude the key findings of the research; it better to be supported by the most important quantitative results from the findings. Please reflect the pros and cons of the proposed method, and justify the superiority of the proposed method.
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Reviewer 3 Report
This paper proposes the efficiency evaluation of the electric bicycle power transmission system, which provides a practical and accurate method for calculating the efficiency of the electric bicycle transmission system in the design stage to improve the efficiency of the electric bicycle. The topics discussed in this article are very interesting. Some suggestions for authors to revise the paper are as follows.
(1) Please indicate the "speed sensor" in the experimental setup, as shown in Figure 5.
(2) Usually, the graphs and tables follow their descriptions. Therefore, it is suggested that Figure 6 and Table 2 should be moved after line 233.
(3) In Figure 6, it is curious why the measured dynamometer torque has a negative value during the period when the motor is off.
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Round 2
Reviewer 1 Report
The authors revised the manuscript considering the issues raised by the reviewers. In the present version it is adequate to be published.
Reviewer 2 Report
Thanks for the efforts from the authors. The reviewer has no further comments; authors have satisfactorily addressed most of my comments.
