PHASE-SHIFTING DEVICE Russian patent published in 2008 - IPC H02P1/30 H02M1/08 H02M7/53846 

FIELD: transformation equipment engineering, possible use for controlling reverse thyristor transformer of constant current or thyristor voltage regulator, for example, to ensure smooth launch of asynchronous electric motors.

SUBSTANCE: device contains control signal source (input of phase-shifting device), adder, amplitude modulator, integrator, 2 relay elements, logical element "XOR", three logical elements "2AND", subtracting "n"-bit binary counter, input for connecting a supply of supporting voltage, generator of stable frequency impulses, adding "n"-bit binary counter, digital comparator, logical element "kAND", where n>k, mono-stable multi-vibrator, logical element "2OR", input for connecting the source of control impulses for power thyristors. Device belongs to the class of integrating systems with two digital scanning functions. One scan is independent and is generated due to generator of stable frequency impulses. The second scan is dependent, which is generated from control signal, and transformed due to impulse signal from output of voltage transformer to impulse frequency. Command for managing power thyristors is generated at the time moments when numeric values of independent and dependent scanning functions are equal or exceeded.

EFFECT: increased interference resistance, increased precision.

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