1. Working principle of power regulator
Thyristor power regulator is based on silicon controlled thyristor (power electronic power device) and has intelligent digital control circuit as its core to control the power supply. It achieves precise temperature control through precise control of voltage, current and power. And with its advanced digital control algorithm, it optimizes power usage efficiency. Played an important role in saving electricity.
The three-phase power regulator is composed of a trigger plate, a special radiator, a fan, and a casing. The core part uses 0 control board and thyristor module; the heat dissipation system uses high-efficiency heat dissipation and low-noise fans. The whole machine has all the functions of the control panel. The current capacity of the whole machine has 7 levels from 40A to 800A.
The three-phase thyristor power regulator uses a digital circuit to trigger the thyristor to realize voltage and power regulation. The voltage regulation adopts phase-shift control method, and the power regulation has two methods: fixed period power adjustment and variable period power adjustment. The control board has phase-locked loop synchronization circuit, automatic phase identification, phase loss protection, power-on soft start, slow shutdown, radiator over-temperature detection, constant current output, current limit, over-current protection, serial working status indication, etc. Function.
2. The difference between power regulator and thyristor voltage regulator
Silicon controlled thyristor (thyristor), as a power switching device, has been very mature in the process of industrial production automation and has been discussed a lot. Currently, in the field of AC power supply, there are two basic control methods for thyristors: power regulation (regulating power P) and voltage regulation (regulating voltage V). The corresponding products are called: power regulator and voltage regulator. Power adjustment and voltage adjustment are two different concepts, and they are also different in use.
The power regulator is also called a cycle number controller. The thyristor is turned on at the zero-crossing point of the voltage (or current) and also cuts off at the zero-crossing point of the voltage (or current), so the output waveform is complete. sine wave. If a fixed time period T is set, within this period, by controlling the on-time TON and the off-time TOFF, the output cycle number (conduction rate) can be controlled.
The thyristor voltage regulator achieves the purpose of changing the voltage by controlling the phase shift angle. Therefore, the output end is a phase-shifted missing-angle wave.
Since the output voltage of the voltage regulator is a missing-angle sine wave and contains high-order harmonics, if no measures are taken, it will cause certain pollution to the power grid, which may have adverse effects on electrical appliances on the same grid. .
As a thyristor power switching device, the power regulator has goodIt is maneuverable, economical and durable, and is widely used in electric heating applications.
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