Seven-Phase PMSM Drives Operation Post Two Types of Faults
Round 1
Reviewer 1 Report
This paper research Seven-Phase PMSM Drives Operation Post Two Types of 2 Faults. The research is interesting. But there is still much to be improved.
1. Abstract needs to be refined.
2. The introduction should focus on the research status and existing problems of multi-phase motor and its fault-tolerant control technology, and then point out the advantages of multi-phase motor and its fault-tolerant control technology studied in this paper.
3. Please quote the latest research results.
4.In Figure 2, the phases “A~G” are adopted. But in the paper, the lowercase “a~g” are used.
5. The font size of all graphics should be the same, and all graphics need to be modified clearly.
6. The research conclusion is suggested to be specific.
Author Response
Review 1 Report Form
This paper research Seven-Phase PMSM Drives Operation Post Two Types of 2 Faults. The research is interesting. But there is still much to be improved.
Reviewer comments :-
- Abstract needs to be refined.
Author response:- the Abstract has been refined. Please see the highlighted
- The introduction should focus on the research status and existing problems of multi-phase motor and its fault-tolerant control technology, and then point out the advantages of multi-phase motor and its fault-tolerant control technology studied in this paper.
Author response:- the introduction has been modified according to your comment. Please see the highlighted
- Please quote the latest research results.
Author response:- some of the papers references are updated to cover the lasts research results. Please see the highlighted references [4],[6-7],[14-16],[35].
4.In Figure 2, the phases “A~G” are adopted. But in the paper, the lowercase “a~g” are used.
Author response:- the text and figure are modified from “a~g” to “A~G” . please see the highlighted text and the figures 9,13, 15,17
- The font size of all graphics should be the same, and all graphics need to be modified clearly.
Author response:- the figures are modified please check the figures 9,13, 15,17
- The research conclusion is suggested to be specific.
Author response :- the conclusion is modified. Please see the highlighted.
Submission Date
08 July 2022
Date of this review
20 Jul 2022 04:22:17
Author Response File: 
Author Response.docx
Reviewer 2 Report
Kindly, correct the grammatical mistakes, specially, tenses and apostrophes.
References are not correctly written.
Kindly, insert clear figures, specially Fig. 3
Author Response
Review 2 Report Form
- Kindly, correct the grammatical mistakes, specially, tenses and apostrophes.
Author response: - the grammatical mistakes has been corrected. Please see the highlighted. Also, the paper if accepted will go for proof reading and if there are mistakes they will be corrected
- References are not correctly written.
Author response: - the references were corrected. Please see the highlighted
- Kindly, insert clear figures, specially Fig. 3
Author response: - figure 3 has been modified. Please see the highlighted
Submission Date
08 July 2022
Date of this review
29 Jul 2022 11:13:50
Author Response File: Author Response.docx
Reviewer 3 Report
Thank you for your kind effort in preparing the manuscript. However, I think there are a few points that need to be looked at:
1- The state-of-the-art is not properly written and it can be misunderstood when reading the introduction section. Therefore, the author should split the introduction section into separate paragraphs highlighting the background of the research, the literature review and its drawbacks, the contribution, and the methodology.
2- This paper has self-plagiarism of some figures which have been taken from Ref. [36].
3- There is no indication of the system parameters used in this study.
4- Figure 7 and Equation (8) are not identical. Please make sure about the correct magnitude of the current. In addition, the author needs to explain how he got these values in the case of Equations (6)-(8).
5- Figure 9 indicates the implementation of the proposed SVPWM. However, the transformation is done for phases a, b, c, d, and e, only, why?
6-In Figure 13 (simulation results), the authors indicated that "the current became almost symmetrical and equals only 23% compared to the currents under healthy operating conditions." This statement is not clear enough. In addition, if this is the percentage of increment in the current magnitude, then it contradicts Equation (8) and the simulation results.
7-What is the PWM switching frequency? As can be seen from the control block diagram of the proposed SVPWM, there is a comparison to generate the switching signals, however, there is no identification of the PWM carrier. The author needs to clarify this point as SVPWM is a modulation scheme where the PWM carrier is used to generate the switching signal rather than using complex dwelling time calculation for SVM scheme.
8- Finally, what can be the implications of the proposed post-fault method since it significantly increases the current peak values in all phases which can significantly affect the motor winding?
Author Response
Review 3 Report Form
Thank you for your kind effort in preparing the manuscript. However, I think there are a few points that need to be looked at:
1- The state-of-the-art is not properly written and it can be misunderstood when reading the introduction section. Therefore, the author should split the introduction section into separate paragraphs highlighting the background of the research, the literature review and its drawbacks, the contribution, and the methodology.
Author response: the introduction has been modified. please see the highlighted.
2- This paper has self-plagiarism of some figures which have been taken from Ref. [36].
Author response: only figure 2,3 are similar to those found in [36]. And these figures are generic talking about the NSV-SVPWM and can be found in many articles.
3- There is no indication of the system parameters used in this study.
Author response: the parameters of the motor is added . please see the Appendix.
4- Figure 7 and Equation (8) are not identical. Please make sure about the correct magnitude of the current. In addition, the author needs to explain how he got these values in the case of Equations (6)-(8).
Author response: equation 8 has been modified. Please see the highlighted. The values in equations 6-8 are already given in the references [16-20,44].
5- Figure 9 indicates the implementation of the proposed SVPWM. However, the transformation is done for phases a, b, c, d, and e, only, why?
Author response: Figure 9 is modified to include all the phases. Please see the highlighted.
6-In Figure 13 (simulation results), the authors indicated that "the current became almost symmetrical and equals only 23% compared to the currents under healthy operating conditions." This statement is not clear enough. In addition, if this is the percentage of increment in the current magnitude, then it contradicts Equation (8) and the simulation results.
Author response: the sentence has modified. Please see the highlighted. This increase of the magnitude of the currents agrees with the modified equation 8. Please check equation 8.
7-What is the PWM switching frequency? As can be seen from the control block diagram of the proposed SVPWM, there is a comparison to generate the switching signals, however, there is no identification of the PWM carrier. The author needs to clarify this point as SVPWM is a modulation scheme where the PWM carrier is used to generate the switching signal rather than using complex dwelling time calculation for SVM scheme.
Author response: the switching frequency that is used in this work was 5 kHz. It is added to the paper. Please see the highlighted in section 3.3
8- Finally, what can be the implications of the proposed post-fault method since it significantly increases the current peak values in all phases which can significantly affect the motor winding?
Author response: the adopted FTC technique used in this paper is called minimum inverter current optimization technique and it will limit the increase of the motor current by 23% only. In the other optimization technique, the current after the fault will increase by 50% as can be seen in equations 6 and 7. Another point, the operation of the motor post the fault should be done for a short time and not for a long time.
Submission Date
08 July 2022
Date of this review
28 Jul 2022 04:55:49
Author Response File: Author Response.docx
Round 2
Reviewer 3 Report
Thank you very much for your kind response and efficient improvement of the manuscript.
