Modal Analysis of a 7.5 kW Synchronous Reluctance Motor

Yilmaz Y., Ozcelik N. G., Ergene L.

2023 International Aegean Conference on Electrical Machines and Power Electronics and 2023 International Conference on Optimization of Electrical and Electronic Equipment, ACEMP-OPTIM 2023, İstanbul, Turkey, 1 - 02 September 2023 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/acemp-optim57845.2023.10287043
  • City: İstanbul
  • Country: Turkey
  • Keywords: modal analysis, mode shape, natural frequency, noise, SynRM, vibration, Young's modulus
  • Istanbul Technical University Affiliated: Yes


Synchronous reluctance motors (SynRMs) are the main candidate to replace induction motors in industrial applications, especially where variable speed is required. The main drawbacks of SynRMs are noise, vibration, and torque ripple. Electromagnetic forces and the stator structure's natural frequencies are the primary causes of these noises and vibrations. Hence, it's crucial to determine the natural frequencies and mode shapes properly, as well as the electromagnetic forces present in SynRMs. Modal analysis is a method for identifying natural frequencies and mode shapes. In this paper, the modal analysis of 7.5 kW SynRM is conducted using both analytical and numerical methods. To provide validation, experimental tests are also carried out. Analysis and experimental results are compared and presented for the validation.