On the Analysis and Torque Enhancement of Flux-Switching Permanent Magnet Machines in Electric Power Steering Systems

Round 1

Reviewer 1 Report

The paper describes a methodology for enhancing the torque of permanent magnetic machines. The authors started showing the theory involving the evaluation of several parameters of the machine, like permeances, fringing factors, saturation factors, and armature reaction, among others.

With the formulae developed, they compared the results in a case study where the methodology and the FEM analysis evaluate the air-gap magnetic flux. The results were adherent and enabled to estimate the level of harmonic contents in air-gap magnetic flux.

For enhancing the torque, they injected in the armature harmonics of currents that cancel cogging torque and others.

The paper is, in our opinion, an original piece Applied to the design of the electrical machines.

 

 

 

Comments for author File: Comments.pdf

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

This paper focuses on the analytical prediction of the airgap flux density of flux switching permanent magnet machines, with considerations of the saturation effect and the fringing effect. The analytical calculation of the airgap flux density meets well with FEA. The work is good, but there are some possible improvements of this paper.

1. Apart from the waveform of the airgap flux density, the specturm comparison of the analytical and FEA results can be conducted, in order to have a more intuitionistic view.

2. Fig. 6, Fig. 8 and Fig. 11 are not completely shown.

3. The title of Fig. 5 is not completely shown.

4. It would be better to analytically calculate the torque, and compare it with the FEA result in Fig. 15.

Author Response

See attached file

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

The manuscript has been sufficiently improved.