DOI: 10.1002/ecj.12437 ISSN: 1942-9533

Analytical method of DC input impedance for stability analysis of IPM motor drive system

Takaya Karino, Toshiji Kato, Kaoru Inoue
  • Applied Mathematics
  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • General Physics and Astronomy
  • Signal Processing


This paper proposes an analytical calculation method of frequency characteristics of DC input impedances of an IPM motor drive system for design and stability analysis by the impedance method. The proposed method is based on an averaged frequency model linearized at an operating point. The developed small‐signal model considers control principles and mechanical perturbations. It is an analog and digital mixed model which is controlled by a digital signal processor system. Analysis examples of frequency characteristics for the impedance method by the proposed method are investigated and validated analytically and experimentally.