FREQUENCY-WIDTH-PULSE CONTROLLER OF AC VOLTAGE WITH DISTRIBUTED LOAD Russian patent published in 2013 - IPC H02M5/22 G05D23/19 

FIELD: electricity.

SUBSTANCE: device comprises a terminal for connection of a setting signal source, a summator, an integrator, from the first to the third relay elements, from the first to the sixth comparators, from the first to the third dynamic D-triggers, terminals of buses with grid voltages of phases A, B, C, from the first to the ninth power switches, load resistors, a zero potential bus, current sensors, from which every one comprises a current transformer, a demodulator (rectifier) and a smoothing filter. The substantial difference of the proposed device is represented by its higher energy indices, achieved due to the fact that each of grid voltage phases operates n the mode of multizone frequency-width-pulse modulation, which becomes possible due to introduction of power switches into A, B, C phases and their appropriate connection to outputs of D-triggers.

EFFECT: higher energy indices of a voltage controller, due to load current balancing between phases.

5 dwg