Effects of Stress on Loss and Magnetic Properties of Fe₈₀Co₃Si₃B₁₀P₁C₃ Amorphous Iron Cores

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The manuscript reports on the effects of stress on loss and magnetic properties of Fe80Co3Si3B10P1C3 amorphous iron cores. The document is clearly written and can be followed with no issues.

Comments are provided below:

- Please add error bard in the graphs so that the reader can assess the influence of the independent variable to the dependent one;

- It should be "MPa" instead of "Mpa"

- Lines 218-221 must be deleted because have been included twice in the manuscript.

-  After epoxy curing, have the authors noticed any shape deformation of the magnetic core samples? If so, please comment in the manuscript.

- Apparently the authors performed the annealing tests under inert atmosphere. Any comments on using coated magnetic cores, and executing the annealing in air? If possible, what could be the possible steps to achieve it?

- The behavior of Figure 4 looks suspicious after 1 kHz, when the growth rate starts increasing. Are there further details that the authors could provide for explaining this behavior?

- Since the authors utilize in the introduction a substantial amount of comments as motors for application, what would be the results that could be anticipated in terms of motor performance using the discussed material? Would it be possible to obtain more efficient machines compared to the state-of-the-art?

Comments on the Quality of English Language

N/A

Author Response

Dear Dr Prof. Editors:

  On behalf of my co-authors, we thank you very much for giving us an opportunity to revise our manuscript, we appreciate editor and reviewers very much for their positive and constructive comments and suggestions on our manuscript entitled " Effects of Stress on Loss and Magnetic Properties of Fe₈₀Co₃Si₃B₁₀P₁C₃ Amorphous Iron Cores".(ID: 2658903)

  We have studied reviewer's comments carefully and have made revision which marked in red in the paper. We have tried our best to revise our manuscript according to the comments. Attached please find the revised version, which we would like to submit for your kind consideration.

  1) Figure 4 has added an error bar.

  2) The 'MPa' in the manuscript has been modified.

  3) Lines 218-221 have been deleted.

  4) The volume of the binder typically decreases during the curing process so the shape of the wound iron core sample will have slight deformation, and the outer diameter size will decrease by 0.05-0.1%. The size of the cutting annular iron core remains basically unchanged.

  5) The use of coated iron cores can achieve annealing in air, but when selecting layer materials (such as CAF4), the heat resistance should be greater than 250 ℃. The specific steps include: strip coating → pressure forming → annealing and curing.

  6) Figure 4 has added an error range. The core loss increases with the increase of frequency, and the growth rate of core loss before 1kHz decreases with the increase of frequency. After 1 kHz, the growth rate increases. The combined effect of hysteresis expansion and internal stress of the core after impregnation and curing affects the change in growth rate.

  7) The losses of electric motors include iron core losses, copper losses, and mechanical losses. After the application of amorphous materials, the iron core loss is greatly reduced, and the copper loss is proportional to the square of the current. The magnetization curve of CAF4 is better than that of 1K101. Under the same excitation effect, CAF4 requires a smaller current to meet the magnetic torque requirements, which means that the copper loss of CAF4 will be smaller. The input power is proportional to the current, and when the current is small, the input power is also small. Under the same output power, a smaller input power can improve the efficiency of the motor. Meanwhile, high magnetic density with the same excitation can achieve lightweight of the motor.

  We would like to express our great appreciation to you and reviewers for comments on our paper. Looking forward to hearing from you.

  Thank you and best regards.

 

  Yours sincerely,

  Wei Zheng

  E-mail:[email protected]

  October 17, 2023

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

Commonly know, that he amorphous alloys appear to be excellent candidates as the core of high-power-density electromagnetic devices, such as high-speed electrical machines and high-frequency transformers, thanks to their advantageous properties of relatively low power losses at high frequency and very high saturation flux density.

In the work submitted for review the authors investigated the impact of internal stress induced by impregnation curing and interference fit on the soft magnetic properties and losses of the Fe80Co3Si3B10P1C3 amorphous alloy iron core, comparing it with the Fe80Si9B11 amorphous iron core.

In my opinion, research on the take-off the impact of interference fit processing on the iron loss of amorphous alloy iron core is a novelty and good scientific achievement in this work. After correcting minor errors, I recommend the work for publication.

Minor errors:

1) Page 4 Line 134 is “Tx1…was 168oC should be 340oC,

2) Page 7 Lines 218-221 this part is not needed here,

3) Page 10 Line 307 is ….(c)…of 101… should be 1K101.

 

Author Response

Dear Dr Prof. Editors:

  On behalf of my co-authors, we thank you very much for giving us an opportunity to revise our manuscript, we appreciate editor and reviewers very much for their positive and constructive comments and suggestions on our manuscript entitled " Effects of Stress on Loss and Magnetic Properties of Fe₈₀Co₃Si₃B₁₀P₁C₃ Amorphous Iron Cores".(ID: 2658903)

  We have studied reviewer's comments carefully and have made revision which marked in red in the paper. We have tried our best to revise our manuscript according to the comments. Attached please find the revised version, which we would like to submit for your kind consideration.

  1) Page 4 Line 134 is “Tx1…was 340℃.

  2) Lines 218-221 have been deleted.

  3) Page 10 Line 307 is 1K101.

  We would like to express our great appreciation to you and reviewers for comments on our paper. Looking forward to hearing from you.

  Thank you and best regards.

 

  Yours sincerely,

  Wei Zheng

  E-mail:[email protected]

  October 17, 2023

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

This paper reports on the magnetic response of the  Fe80Si9B11 (1K101) and  Fe80Co3Si3B10P1C3 (CAF4) amorphous iron cores under  compressive stress conditions. I found the manuscript scientifically sound and well organized. 

Author Response

Dear Dr Prof. Editors:

  On behalf of my co-authors, we thank you very much for giving us an opportunity to revise our manuscript, we appreciate editor and reviewers very much for their positive and constructive comments and suggestions on our manuscript entitled " Effects of Stress on Loss and Magnetic Properties of Fe₈₀Co₃Si₃B₁₀P₁C₃ Amorphous Iron Cores".(ID: 2658903)

  We have studied reviewer's comments carefully and have made revision which marked in red in the paper. We have tried our best to revise our manuscript according to the comments. Attached please find the revised version, which we would like to submit for your kind consideration.

  We would like to express our great appreciation to you and reviewers for comments on our paper. Looking forward to hearing from you.

  Thank you and best regards.

 

  Yours sincerely,

  Wei Zheng

  E-mail:[email protected]

  October 17, 2023

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

Topics addressed.