UNIT FOR SAMPLE-DATA CONTROL OF SPEED OF VEHICLE TRACTION MOTOR Russian patent published in 1994 - IPC

FIELD: transport means. SUBSTANCE: device has main thyristor and current detector, commutating capacitor and restrictor, two additional diodes, recharge thyristor, two pulse formers, current set-point device, pulse-width modulator, comparison unit, pulse generator. Two units for accumulating and converting electric power, two power, units and two optical communication systems are introduced into the unit additionally. Unit operates in the mode of pulse-width modulation at constant control frequency. Pulse ratio increases as traction motor brings up to speed due to shift of control signal of the main thyristor in relation to control signal of recharge thyristor. EFFECT: increased pulse ratio. 5 cl, 3 dwg