A Complete and Fast Analysis Procedure for Three-Phase Induction Motors Using Finite Element, Considering Skewing and Iron Losses
Round 1
Reviewer 1 Report
In this paper, an improved FEM-based fast computational method for induction motors is proposed and experimentally verified. The results of magnetostatic calculations in conjunction with the induction motor equivalent circuit are used instead of dynamic time-domain calculations. The skewing effect is considered.
Comments to be addressed:
1) How many minutes does it take to calculate the motor characteristics using the proposed method and using other known methods (FEM-assisted equivalent circuit based methods and time-domain methods)?
2) What is the efficiency and energy efficiency class of the considered induction motor?
3) Do you plan to apply the developed mathematical model in conjunction with an optimal design algorithm, for example, a genetic algorithm?
4) A couple of quick computational methods for induction motors are also implemented in Motor-CAD Software. Can you highlight the pros and cons of the proposed method compared to the MotorCAD methods?
Author Response
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Author Response File: 
Author Response.pdf
Reviewer 2 Report
The paper proposes a new method for a fast analysis of induction motor using finite elements method. It includes the skewing and the iron losses, which are very often overlooked.
I found only a few minor things that could be fixed or extended. Do you assume the star configuration of the stator winding, or does the method work independently of the winding topology? The method assumes a motor fed from a harmonic voltage source. Can the method be used for the inverter-fed motor or will the finite switching frequency influence the results (probably iron losses)? In page 2, row 40, do you mean "stator teeth and yoke"? The numbering of the chapters should start with number 1.
I recommend the paper for the publication in the present form.
Author Response
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Author Response File: Author Response.pdf
Reviewer 3 Report
In my opinion this paper is not very very innovative but it's very clear and offer a clear description of fem design and simulation method .
Also paper is well written and my general impression is quite good.
For what concern description of finite element model for me it's not clear the adopted tool this should be quite important..
Also in a paper concerning FEM some recommendation or at least informations concerning meshing and discretization (shape and order of elements, meshing criteria ) it should be useful especially considering the didactical content of the paper and its potential diffusion among industrial community. Meshing should be also influenced by the kind of phenomena that the model has to reproduce since some high frequency phenomena are often related to low geom scale.
A typical example in this sense that should be cited is represented by recent application of wireless power transfer where modeling of high frequency behavior poses some serious issues in this sense:
Allotta, B., Pugi, L., Reatti, A., Corti, F. Wireless power recharge for underwater robotics (2017) Conference Proceedings - 2017 17th IEEE International Conference on Environment and Electrical Engineering and 2017 1st IEEE Industrial and Commercial Power Systems Europe, EEEIC / I and CPS Europe 2017, art. no. 7977478, . DOI: 10.1109/EEEIC.2017.7977478or Pugi, L., Reatti, A., Mastromauro, R.A., Corti, F. Modelling of inductive resonant transfer for electric vehicles (2018) International Journal of Electric and Hybrid Vehicles, 10 (2), pp. 131-160. DOI: 10.1504/IJEHV.2018.095715
Probably some few words at least introducing the problem should be done for what concern thermal effects.
Author Response
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Author Response File: Author Response.pdf
