ELECTRIC DRIVE Russian patent published in 1997 - IPC

FIELD: servo control systems. SUBSTANCE: introduced in electric drive are integrator 25, adding and subtracting units 21, 22. Reference-voltage generator is built up of chokes with primary windings inserted in circuits of field windings 6,7 of angle and speed sensor and secondary windings 18,19 connected through unlike-polarity rectifiers 16,17 to inputs of adder 20 whose output is connected to reference inputs of phase-sensing rectifiers 23. Inputs of the latter are connected through units 21 to output windings of angle and speed sensor which are connected through units 22 to speed transducers 24. Outputs of the latter and of phase-sensing rectifiers are connected to inputs of speed signal shaper. EFFECT: improved accuracy due to separation of speed and angle signals; simplified design. 4 dwg