: Synchronizes the control pulses with the AC supply voltage, usually detecting the "zero-crossing" point to establish a reference for the firing angle.
), which determines the exact moment a thyristor begins conducting during an AC half-cycle, thereby controlling the power delivered to a load.
: Produces sharp, high-energy pulses (often using a UJT-based relaxation oscillator or dedicated ICs) that are strong enough to reliably trigger the thyristor gate. shema bloka upravlenija tiristorami
A standard control unit typically consists of several functional stages to ensure reliable triggering:
: Varies the portion of each AC wave that is passed to the load. : Synchronizes the control pulses with the AC
These units are essential in industrial and heavy-duty electronics where high power management is required:
A (Blok Upravlenija Tiristorami or BUT) is an electronic system designed to generate and distribute control pulses to the gate terminals of thyristors. Its primary function is to regulate the "firing angle" ( A standard control unit typically consists of several
: Switches full cycles on and off over a set time period to reduce electromagnetic interference.