CONTACTLESS DC MOTOR Russian patent published in 1997 - IPC

FIELD: DC drives, in the first place, in low-speed and torque devices (for instance, in power dumping of flat-cars used as a torque motor). SUBSTANCE: motor has a two-phase winding, whose sections are connected in a bridge circuit, four rotor position pickups shifted in space relative to each other through 90 electrical degrees, and an electronic switching circuit built around four transistors. The outputs of the diametrically arranged rotor position pickups are connected to the bases of the like transistors. EFFECT: improved design. 2 dwg