Young's modulus for laminated machine structures with particular reference to switched reluctance motor vibrations

The switched reluctance motor (SRM) has a disadvantage of higher acoustic noise, caused by stator vibrations. Techniques for noise reduction require knowledge of the modal frequencies, which depend on mechanical shapes and dimensions as well as material properties, for example, Young's modulus,...

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Published in:IEEE transactions on industry applications 2004-05, Vol.40 (3), p.748-754
Main Authors: Zhangjun Tang, Pillay, P., Omekanda, A.M., Chen Li, Cetinkaya, C.
Format: Article
Language:English
Subjects:
Acoustic noise
Frequency
Iron
Material properties
Noise reduction
Reluctance machines
Reluctance motors
Shape
Stators
Vibration measurement
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description The switched reluctance motor (SRM) has a disadvantage of higher acoustic noise, caused by stator vibrations. Techniques for noise reduction require knowledge of the modal frequencies, which depend on mechanical shapes and dimensions as well as material properties, for example, Young's modulus, Poisson's ratio, mass density, etc. It is found that the generally accepted value of Young's modulus is not valid for a machine with laminations and no frame. This paper introduces a simple and nondestructive method for the measurement of Young's modulus; it is then used in a finite-element (FE) program to determine the resonant frequencies of SRM stator vibration. The effects of mass density and Poisson's ratios are also discussed. The FE results are validated by vibration tests, which show good accuracy.
doi_str_mv 10.1109/TIA.2004.827460
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subjects Acoustic noise
Frequency
Iron
Material properties
Noise reduction
Reluctance machines
Reluctance motors
Shape
Stators
Vibration measurement
title Young's modulus for laminated machine structures with particular reference to switched reluctance motor vibrations
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