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

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 cite{deCallafon_IFAC2011}. 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.