ELECTRIC DRIVE WITH CURRENT-FREQUENCY CONTROL Russian patent published in 1998 - IPC

FIELD: line AC drive. SUBSTANCE: electric drive uses period increment-to-code converter 9, increment storage 10, function generator 13 made for generation of a code at the output representing a remainder of division of the input code by divider n_o= K•(P₂/P₁)•2π, where P₁ and P₂ - coefficients of electrical reduction of motor 1 and motor rotor position pickup 2; K and π - constants. With the aid of the introduced units digital-to-analog converters 14, 15 produce voltages, which approximate the required settings of phase currents at a high accuracy, no restrictions are imposed on the coefficients of electrical reduction of the motor and pickup. EFFECT: simplified design. 2 wdgi