, Volume 94, Issue 3, pp 155-163,
Open Access This content is freely available online to anyone, anywhere at any time.
Date: 09 Dec 2011

Gentle synchronization of two-speed synchronous motor with asynchronous starting


The paper presents the results of synchronization calculations for a selected model of the GAe 1716/20t two-speed synchronous motor with switchable armature and field magnet windings, used for driving the main fans in deep mines. The calculations were performed using a specially developed (and validated by measurements) field-circuit model of the motor. The effect of the initial instant of synchronization on the latter’s effectiveness and on dynamic process stabilization time was studied. It is shown that synchronization effectiveness can be increased through proper field current control in the synchronization initiation–synchronous speed interval. It is also shown that synchronization time can be reduced and the dynamic waveforms attenuated after the motor reaches the synchronous speed. The calculation results are presented in the form of diagrams.