On Unintentional Demagnetization Effect of Switched Flux Hybrid Magnet Memory Machine

Round 1

Reviewer 1 Report

This paper describes the unintentional demagnetization effect of a switched flux hybrid magnet memory machine. The unintentional demagnetization effect is theoretically described, and measurements on a prototype is carried out. This paper is well organized. However, a miner revision is needed based on the following comments.

1. In the measurements, how was the back EMF when a q-axis current is applied measured?
2. The phase current density under iq=30 A should be added.

Author Response

Dear Reviewer,

We would like to sincerely thank you for spending precious time on the manuscript and the reviewers for their constructive comments and suggestions, which are fully taken into consideration in our revision.

The modifications are detailed as follows and highlighted in RED in the revised paper.

Yours sincerely

The authors

Author Response File: Author Response.pdf

Reviewer 2 Report

This paper studies the unintentional demagnetization characteristics of low coercive force permanent magnets in switched flux hybrid magnet memory machines. These magnets are magnetically in parallel to the magnetic fields produced by the rare earth permanent magnets. However, the authors state that low coercive force permanent magnets can demagnetize under on-load operation due to the magnetic saturation effect. The paper shows experimental results based on a fabricated machine prototype.

Although the paper has the potential to be published, the authors should reply the following remarks in order to improve some of the aspects of the manuscript,

1. Introduction section. The novelties and contributions of the paper must be further stressed, and also the advantages with respect state of the art solutions. This is a critical point of the paper, so it need several lines for this detailed description.
2. It is not clear the range of application of such machines. Please develop and include in the text commercially available vehicles incorporating these machines.
3. Section 2.1: “Fig. 1 shows the topology of the proposed SF-HMMM with 6/13 stator-slot/rotor-pole 75 configuration”. However, the rotor shown in this figure has 11 poles.
4. MS must be explained the first time it appears in the text.
5. Line 223: a reference is missing
6. It would be nice to check the performance of the machine under a condition leading to UD, to better compare with the theoretical developments.
7. More references from 2021 and 2022 are welcome.

I hope a revision of the manuscript based on these remarks can help to improve its quality and readability.

Author Response

Dear Reviewer,

We would like to sincerely thank you for spending precious time on the manuscript and the reviewers for their constructive comments and suggestions, which are fully taken into consideration in our revision.

The modifications are detailed as follows and highlighted in RED in the revised paper.

Yours sincerely

The authors

Author Response File: Author Response.pdf

Reviewer 3 Report

Dear Authors,

I have some comments on your article:

1. Figure 1. - For a complete picture, it would be good to present a diagram of the winding in figure c).
2. All indexes in symbols in text and equations should be checked carefully.
3. Literature should be checked if there are no newer items. Especially from the last 18 months.
4. In the summary, it should be clearly stated what should not be done to extend the life of the analyzed machine.

Author Response

Dear and Reviewer,

We would like to sincerely thank you for spending precious time on the manuscript and the reviewers for their constructive comments and suggestions, which are fully taken into consideration in our revision.

The modifications are detailed as follows and highlighted in RED in the revised paper.

Yours sincerely

The authors

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

The authors have replied all my questions