Eigenvalue analysis of six-phase synchronous motor for small signal stability

摘要

The increased application of multiphase (more than three-phase) synchronous motor requires it to be investigated from stability point of view. Therefore, this paper primarily addresses the stability analysis of a six-phase synchronous motor during steady-state operation using eigenvalue criteria from its derived linearized model. Based on the variation of dominant eigenvalues, region of instability is determined under different parametric variation and working conditions. Results establish a preferable method for motor stabilization at its design stage as well as under normal working conditions. Analysis has been carried out by using the approach of Park's (dq0) transformation in MATLAB environment together with some experimental results.