The invention relates to electrical engineering, in particular to the field of automated and electric converters. The soft start of high-voltage electric motor, comprising: an AC motor connected to the mains via a first switch and to the output of a three-phase thyristor voltage regulator, which is connected to the supply network through the second switch and contains a thyristor unit with current control, transformer system, and switches the switching device , software and remote control device, wherein the control system is connected to the control inputs of the thyristor unit, transformers current and the first output of the programmer, the second output of the programmer is connected to the first input circuit switching device and inputs the device software - to the outputs of the current and control transformers, into which the flow control dead time having inputs connected to the outputs of current transformers, and output connected to the second input of the switching circuit device. dead time control unit comprises N null bodies, an OR gate, an integrator, a relay member and the serial register operable in two D-flip-flops and AND gate inputs the zero-bodies and an output of the AND gate are the inputs and the output of dead time control unit , the output of each zero-organ; connected to the inputs of the OR gate, its output connected to the input of the integrator, whose output is connected to the input of the relay element, the output of the last is connected to the D-input of the first D-flip-flop, the outputs of D-flip-flops are connected to inputs of the AND gate, and the C-inputs of D -triggerov connected to the output of an OR gate.
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