Properties of a Synchronous Machine with Self-Regulating Magnetic Suspension of the Rotor when Its Axis Is Skewed

Abstract

In this paper, the electromagnetic processes in a coreless synchronous machine with a superconducting excitation winding and a stator winding connected by a zero-flow scheme at a skewed rotor axis are considered. It is shown that, in conditions of “pure” nutation, the zero flow contours do not function, and this machine operates as an ordinary synchronous machine. In this regard, the moment of nutation is formed due to the interaction of the unperturbed stator current with the perturbed excitation field and is, therefore, dependent on the load angle. When the longitudinal (in the sense of Gorev) current of the stator changes sign, the moment of nutation also changes its sign and can become either stabilizing (reduce the angle of nutation) or destabilizing. The destabilizing nature of the moment of nutation can appear at small load angles. The basics of this machine theory are described.