A power regulator is a disk mounted power adjustment unit that uses thyristors (also known as thyristors) and their triggering control circuits to adjust load power. Nowadays, more emphasis is placed on using digital circuits to trigger thyristors for voltage and power regulation.
The three-phase thyristor closed-loop technology thyristor voltage regulator adopts phase-shift trigger control method, and the output voltage, current or power can be continuously adjusted, with the characteristics of constant voltage, constant current or constant power. The principle diagram of the trigger board for three-phase thyristor closed-loop technology is based on a typical dual closed-loop control, with the current loop as the inner loop and the voltage loop as the outer loop. Now let's introduce the control principle of the voltage regulator with its "constant voltage control characteristic". The adjustment process is as follows: given signal (Ug), voltage feedback signal (Uf), current feedback signal (If)
When the output voltage of the voltage regulator decreases for some reason (such as a decrease in grid voltage): (Ug-Uf) ↑ → UO ↑ → Uy ↑ → α ↓ → The output voltage of the voltage regulator U ↑ * reaches a balance between Uf and Ug, and the voltage regulator outputs a stable voltage.
 
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