SYNCHRONOUS MOTOR Russian patent published in 2000 - IPC

FIELD: electrical engineering; variable- reluctance inductor motors; low-speed drives for domestic applications. SUBSTANCE: synchronous motor is electrical machine that has stator and non-wound passive rotor. Stator has n salient poles, where n ≥ 4. Pole surface is smooth or has toothed area. All stator poles carry identical inductance coils connected into phases each incorporating series- connected diode and coils; diodes inserted in parallel circuits are connected differentially; one phase lead is connected to neutral input of motor and other lead, to sine-wave ac voltage supply. Each pole is provided, in addition, with one or two magnetic shunts whose outer surface is similar to that of poles. EFFECT: improved operating stability with single- and three-phase power supply, simplified design, reduced mass and size, improved torque characteristics. 4 cl, 2 dwg