FIELD: converter engineering; controlling thyristor voltage regulators in starting induction-motor drives.
SUBSTANCE: proposed system has sync signal source, two relay units, adder, integrator, control pulse shaper, voltage regulator, integrator, and three-phase voltage supply. Newly introduced in proposed system are first rectifier and first limiting amplifier, as well as series-connected second rectifier and second limiting amplifier. Inputs of rectifiers are connected to three-phase voltage supply and outputs of limiting amplifiers, to power terminals of first relay unit. Power terminals of limiting amplifiers are connected to output of voltage regulator.
EFFECT: enhanced precision and operating reliability.
1 cl, 19 dwg
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