Portal de Periódicos da CAPES

Nonlinear H-infinity feedback control for asynchronous motors of electric trains

2015; American Institute of Physics; Volume: 1702; Linguagem: Inglês

10.1063/1.4938916

1935-0465

Gerasimos Rigatos, Pierluigi Siano, Patrice Wira,

Control Systems in Engineering

A new method for feedback control of asynchronous electrical machines is introduced, with application example the problem of the traction system of electric trains. The control method consists of a repetitive solution of an H-infinity control problem for the asynchronous motor, that makes use of a locally linearized model of the motor and takes place at each iteration of the control algorithm. The asynchronous motor's model is locally linearized round its current operating point through the computation of the associated Jacobian matrices. Using the linearized model of the electrical machine an H-infinity feedback control law is computed. The known robustness features of H-infinity control enable to compensate for the errors of the approximative linearization, as well as to eliminate the effects of external perturbations. The efficiency of the proposed control scheme is shown analytically and is confirmed through simulation experiments.