Speed and load torque observer application in high-speed train electric drive

Jaroslaw Guzinski, Haitham Abu-Rub, Marc Diguet, Zbigniew Krzeminski, Arkadiusz Lewicki

Research output: Contribution to journalArticle

86 Citations (Scopus)


This paper presents an application of induction motor mechanical speed and load torque observers in high-speed train drives. The observers are applied for a 1.2-MW electric drive with an induction motor. The goal of using such observers is to utilize computed variables for diagnostic purposes of speed sensors and torque transmission system. The concept of diagnostic system is presented in this paper, and proper criteria are proposed. The suggested system is designed to work without a speed sensor in the case of existing sensor faults. Monitored motor load torque is used to limit the maximum motor torque in the case of existing problems in the gearbox. The results of simulation and experimental investigations for a 1.2-MW induction motor drive are presented.

Original languageEnglish
Article number5210157
Pages (from-to)565-574
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Issue number2
Publication statusPublished - 1 Feb 2010



  • Diagnostics
  • Induction motor
  • Observers
  • Rail vehicle
  • Sensorless control

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this