Modal Analysis of a 7.5 kW Synchronous Reluctance Motor

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.