Parametric identification of PM synchronous motors: A Hammerstein-model approach

Abstract

In this paper, the problem of estimating the (quadrature) magnetic flux linkage in permanent magnet synchronous motors (PMSM) is solved by using an off-line closed-loop system identification procedure for Hammerstein models recently proposed in [1]. By parametrizing the magnetic flux nonlinearity in terms of a linear combination of triangular basis functions, a standard output error identification problem can be formulated and solved in a pseudo-optimal way using an iterated instrumental variable (IV) method. After discussing some details related to the design of the closed-loop identification experiment, the paper presents some experimental results that highlight the potentials of the proposed method.