CONTACTLESS LOW-SPEED HIGH-MOMENT D C MOTOR Russian patent published in 1997 - IPC

FIELD: electric machine engineering. SUBSTANCE: patented contacless low-speed high-moment D. C. motor has main rotor, main stator with working winding, first electron commutator, contactless position pickup, auxiliary salient pole stator and rotor, second electron commutator which assemblage together with contactless position pickup monitoring relative position of auxiliary rotor and stator creates autooscillatory motion of auxiliary rotor with constant frequency and amplitude and of second mobile magnetic core of main stator with working winding rigidly coupled to auxiliary rotor. Controlling pulse is sent into working winding from first electron commutator coupled via second electron commutator to contactless position pickup at moments when second magnetic core deviates from center position in one direction. At same moments magnetic field formed by working winding induces eddy currents in main rotor located in gap between first immobile and second mobile magnetic cores of main stator with which deviation its magnetic field entrains main rotor as it forms rotary motion of output shaft in one direction. Speed of rotation of output shaft depends on frequency of interaction of magnetic fields of second magnetic core and main rotor which is determined by control pulse repetition frequency set by autooscillation low-frequency motion of auxiliary rotor which usually does not exceed several Hz. EFFECT: improved functional reliability of proposed motor. 10 cl, 9 dwg