Stable operation of a two-phase asynchronous servomotor with negative speed feedback

The paper deals with the conditions of stable operation of a two-phase servomotor possessing any parameters of machine and supply system with negative speed feedback for general case of asymmetry.
Criteria for stable operation of the servomotor are stated. The author recommends to define parameters of the negative feedback through parameters of mechanical characteristics at the starting point.
The expressions for the calculation are given in terms of generalized parameters.
Theoretical results are confirmed by experiments.