Analytical Investigation of Vibration in Switched-reluctance Machines Using Modal Analysis

Document Type : Original Article

Authors

1 PhD student, Shahrekord University, Shahrekord, Iran

2 Professor, Shahrekord University, Shahrekord, Iran

3 Associate Professor, Shahrekord University, Shahrekord, Iran

Abstract

Abstract: In the presented work, a procedure is proposed for vibration analysis in the switched reluctance machines. The machine geometry, mechanical properties of the used materials, stator winding configuration, and the current waveforms are considered as the model input variables. The mechanical natural frequencies are computed using a simple mechanical model. The stator bore magnetic stress is obtained as a function of time and space by using Maxwell’s stress tensor. The required flux density components are obtained by developing an analytical model based on sub-domain analysis. Applying fast Fourier transformation on the computed magnetic stress function, the spectrums of the mechanical modes are obtained and it is found that how they are far from the obtained natural mechanical frequencies. This index is used as a criterion for electromagnetic vibrations. The mechanical and electromagnetic models are verified by means of finite element analysis. Using the developed model, the critical speed values with mechanical resonance are obtained. In addition, using the developed model the effect of the machine load on the mechanical vibrations is investigated.

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Applied Electromagnetics
Volume 12, Issue 1 - Serial Number 28
Spring and Summer
September 2024

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History

  • Receive Date: 29 March 2023
  • Revise Date: 21 June 2023
  • Accept Date: 01 July 2024
  • Publish Date: 22 July 2024

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