ES329505A1 - Improvements in the autocarranque of the small synchronous engines (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in the self-start of the small single-phase synchronous motors, which have a box-shaped stator and a rotor constituted by a permanent magnet that rotates inside said stator, which, on the one hand, contains an excitation coil coaxial to said rotor and, on the other hand, has poles peripherally distributed, characterized by the fact that each pole is formed by two tabs separated from each other by an interval greater than that separating the two adjacent tabs belonging to two poles of opposite polarities , that the diametrically opposite tongues are of opposite polarity and that certain pairs of these diametrically opposed tongues are suppressed, so that, on the one hand, two contiguous tongues of opposite polarity form a magnetic circuit whose magnetization is relatively rapid at each period of time. the excitation current, and, on the other hand, a tongue adjacent to the location corresponds to The tooth to a suppressed tongue forms a magnetic circuit whose magnetization is relatively slow at each period of the excitation current, so that each pole of the rotor is attracted alternately by a semi-magnet rapidly magnetized to saturation and by a semi-magnet slowly magnetized, with view of the engine self-starting in a preferred sense. (Machine-translation by Google Translate, not legally binding)