Short Circuit and Broken Rotor Faults Severity Discrimination in Induction Machines Using Non-invasive Optical Fiber Technology
Round 1
Reviewer 1 Report
The paper presents non-invasive optical fiber technique in the condition monitoring and fault detection of induction machines, but some comments must be considered to enhance the quality of the work
- English language must be reviewed, i.e., is it correct sentence “
Increasing the pool of available techniques will be crucial given the indispensable role electric machines will play in man’s adaptation to a more sustainable environment”.
“For the magnetic field source, an openly-wound 4V DC motor whose windings were exposed was used with a DC power supply unit to provide the need current for different magnetic field strengths”.
- 3a must be readable.
- 6 must be improved
- Reformat page 15
- The reviewer cannot evaluate the quality of the work, we did not see any comparison with the other methods to solve the same problem. Can the authors add the comparison with the other methods and explain the advantages and disadvantages of these methods? What is the advantages of the proposed method rather than the others?
- I can see that the work needs more evidence to say a novel non-invasive optical fiber technique
Author Response
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Author Response File: 
Author Response.docx
Reviewer 2 Report
Basically, the article describes the design of the FBG-T sensor, its design, setup and experiments regarding the diagnostics of the AC motor. A new method for monitoring and diagnosing the motor when it is running without disassembly is presented. The advantages of the developed system are multuplexing, multifunctionality, long transmission distance, EMI / RFI immunity, electric isolation, signal integrity, and size. The measuring part consists of FBG, which converts pressure, temperature, acceleration, strains, displacement into particular wavelengths of light and Terfenol-D, which converts magnetic induction into vibrations. The innovative nature of the developed method consists in the fact that the measurements and diagnostics has a non-invasive character and is almost never used in electric motors.
However, I recommend that some issues to be discussed in more detail:
When measuring small magnetic inductions, it is always a question of the influence of the magnetic field of a number of devices around the test rig and the magnetic field of the earth.
How will the motor temperature affect the measurement accuracy of the FBG-T sensor because it is mounted on the motor housing?
The question can be continued about the influence of the engine vibrations, considering that the vibrations of Terphenol-D are about 30 pm .
Criteria for accuracy of measurements.
Author Response
Please see the attachment
Author Response File: Author Response.docx
Round 2
Reviewer 1 Report
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