Analysis of fault states in drive systems with multi-phase induction motors

Abstract

The paper presents the analysis of different fault states in drive systems with multiphase induction motors. The mathematical models of a five-phase and six-phase induction motor and the MRASCC estimator have been presented and the description of the Space Vector Modulation has been shown. The Direct Field-Oriented Control (DFOC) system is analyzed. Results of the simulation and experimental studies of the Direct Field-Oriented Control systems in the fault conditions are presented. The author’s original contribution includes analysis and studies of the DFOC control method of a five-phase induction motor resistant to the motor speed sensor fault with the use of the MRASCC estimator.

Keywords

• direct field-oriented control method
• fault tolerant control
• mrascc estimator
• multiphase squirrel-cage induction motor
• sensorless drives
• voltage source inverter faults