G. A. Leonov
Professor
Saint-Petersburg State University,
The Faculty of Mathematics and Mechanics
Universitetsky prospekt, 28,
198504, Peterhof, St. Petersburg, Russia
A. M. Zaretskiy
Post-graduate student
The faculty of Mathematics and mechanics
Saint-Petersburg State University
In the work a new mathematical model of a four-poles synchronous machine with serial connection is proposed. The limit load problem is considered. For obtaining estimates of limit load, the non-local reduction method is applied. Based on modification of the non-local reduction method the criteria of existence of circular solutions and cycles of the second kind are obtained.