6CHAN T H, CHEN S L. Exact linearization of a Vohage - con- trolled 3 - pole Active Magnetic Beating System [ J ]. IEEE Trans. Contr. Syst. Technol. , 2002, 10(4) :618 -625.
7LOBANOFF V S, ROSS R R. Centrifgual pumps: design and appli-cation [M]. Gulf Publishing Company, Houston, 1992.
