Design method of ILQ robust current control system for synchronous reluctance electrical motors

Yoko Amano, Hiroshi Takami, Takao Fujii

Research output: Contribution to journalArticle


In this paper, a robust current control system for a synchronous reluctance electrical motor by an ILQ (Inverse Linear Quadratic) design method is proposed newly. First, for performing simultaneously decouple and large region linearization of an d-q axes system in the synchronous reluctance electrical motor using nonlinear state feedback, it is derived that a linear current-voltage state equation linearized model by the d-q axes decouple of the synchronous reluctance electrical motor. Next, according to the ILQ design method, an optimum solution and an optimal condition that achieve the robust current control system for the synchronous reluctance electrical motor are analytically derived, then the robust current control system can be designed. Finally, in practical experiments, we compare the proposed method with the PI (Proportional Integral) control method, the creativity and the usefulness of the proposed method are confirmed by experimental results.

Original languageEnglish
Pages (from-to)401-408+9
JournalIEEJ Transactions on Electronics, Information and Systems
Issue number3
Publication statusPublished - 2012



  • Electrical motor driver system
  • Inverse LQ design method
  • Optimal servo system
  • Robust current control system
  • Synchronous reluctance electrical motor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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