Mathematical model of synchronous motor in small oscillation mode

Abstract

The major drawback of synchronous motor functioning is sufficiently high rotor oscillation resulting in irregular motor speed. This paper presents refined mathematical model of synchronous motor in small oscillation mode, and covers theoretical justification of one of the techniques for oscillation damping in rotor of permanent-magnet synchronous motor in synchronous mode by introducing a stator current feedback with impact on phase voltage.

Discrete hall sensor based vector control algorithm of permanent magnet synchronous motor

“…To solve this problem, the control system includes the stator current control circuit. From the implementation standpoint, it is very convenient that the current control circuit time constant may be large enough, and this condition is required to ensure that current controlling does not affect the instantaneous speed fluctuations [4]. Consequently, the time discrete interval in the current control circuit may well be associated with the interval between the signals emitted by discrete Hall sensors.…”