This paper deals with the results of experimental investigation into a six-pole single-phase line start permanent magnet synchronous motor. The influence of the running capacitor capacitance on the motor running properties was investigated. The influence of the starting capacitor capacitance and its switch-off time on the motor starting properties was investigated.
This paper presents an analysis of the synchronization process of the high-power, two-speed synchronous motor out of over synchronous speed. A method of increasing the effectiveness of synchronization by applying a change system of polarization of the field circuit supply DC voltage is proposed. The process of synchronization from the stator supply voltage is also analyzed. The influence of the periodic reduction value of the supply voltages on the synchronization processes was also investigated. The proposed synchronization method can be applied during the synchronization processes of line start permanent magnet synchronous motors with a two-stage start-up.
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