Mode Switching Frequency of Electrohydraulic-Power-Coupled Electric Vehicles with Different Delay Control Times

Round 1

Reviewer 1 Report

This study presents electromechanical-hydraulic power coupled electric vehicle is developed and investigated. This vehicle integrates a conventional electric motor with a hydraulic pump/motor to interconvert electrical, mechanical, and hydraulic energies, while a rule-based dynamic optimal energy management strategy is designed to achieve dynamic switching of operating modes according to the operating conditions. The work is interesting, but the following comments should be addressed.

1. The research gaps should be further highlighted.
2. The contribution section needs to be further elaborated after finding research gaps.
3. Literature section should be summarized as a table.
4. A comprehensive comparison should be demonstrated. It is very important to demonstrate the effectiveness of the paper.
5. Conclusion section should be elaborated with findings, shortcoming and future work.
6. More analysis should be presented.
7. Sensitive analysis should be conducted.

Author Response

Dear reviewer,

  hello,

  I have replied to your question one by one in the attachment，please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

the paper untitled "Mode Switching Frequency of Electrohydraulic Power Coupled  Electric Vehicles with Different Delay Control Time", presents a modified solution for reducing power sensitivity. 
globally the work needs to be ameliorated for enhancing the quay of the study.
1- equations must be revised, try to use the Microsoft equation tool for writing all equations

2-equation 2 is not clear. you mean that Pmmax must be superior than the three powers?

3-P1, P2 and P3, must be proved by citing the references.

4-the same thing is about equation 5, it is not proved. 

5-figure 3, must be explained more in detail by talking on each block. also try to improve its quality.

6-figure 8, is not discussed clearly. what is "for 555 s-590 s" this is not clear in the figure. 

7- can you add an flowchart which describe the proposed control topology and explain the process simply. 

8-what is the used motor type for this prototype.

 

Author Response

Dear reviewer,

  hello,

  I have replied to your question one by one in the attachment，please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

authors were addressed to all my remarks and i see that the paper is better in its current version

i suggest improving the reference list with some references about PMSM, as it is used as the main motor.

1. Brushless Motor and Wireless Recharge System for Electric Vehicle Design Modeling and Control. In Handbook of Research on Modeling, Analysis, and Control of Complex Systems; 2020.
2.  BLDC Control Method Optimized by PSO Algorithm. Int. Symp. Adv. Electr. Commun. Technol. 2019, doi:10.1109/ISAECT47714.2019.9069718.
3. An Improved Reactive Power MRAS Speed Estimator With Optimization for a Hybrid Electric Vehicles Application. ASME, J. Dyn. Syst. Meas. Control 2018, 140, 061016, doi:10.1115/1.4039212.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf