SINGLE-PHASE SELF-STARTING SYNCHRONOUS MOTOR Russian patent published in 2005 - IPC

FIELD: low-power single-phase synchronous motors.

SUBSTANCE: proposed synchronous motor has stator with U-shaped magnetic core carrying field coils, cylindrical rotor in the form of diametrically saturated permanent magnet, two fastening plates, and laminated locating device for unidirectional starting of rotor. Laminated locating device is installed with its one end on axis of one of fastening plates for rocking and on other end it has shaped hole coaxial with rotor which is provided with two projections formed by shifting two semicircles and is engageable with cam disposed on rotor end eccentrically to axis of revolution, its lateral end directed to interlocking end being disposed on rotor radius line; in order to avoid rotor entering dead zone during starting period, common axis of projections on laminated locating device is inclined through angle of 40 - 55 deg. to stator pole axis, and rotor cam axis is inclined through 90 deg. to rotor pole axis.

EFFECT: simplified design, reduced size of interlocking device in single-phase synchronous motor.

2 cl, 2 dwg