Voltage regulator for smooth regulation of power on the load

To begin with, what is a voltage regulator and where did it come from? The regulator described in the article is considered. "How to manage warm floors?", there I told how to use it to control underfloor heating. In this article, I propose to get inside this device, see what it consists of, how to properly connect the load to it.

So, the voltage regulator is a universal device designed for use in a wide range of areas: for automation and control systems for lighting, ventilation, indoor climate, for integration into smart home systems, for smooth starting of asynchronous and synchronous motors and other tasks where there are the need for smooth regulation of power at the load.

Structurally, the voltage regulator has a modular design - power board, power board and controller board, fuse board. This design has several advantages: ease of assembly, interchangeability of modules, high maintainability.

The case of the device is an aluminum radiator, onto which power semiconductor devices are installed. The base, together with the cover and two side walls, form the protective cover of the IP 54 device.

The voltage regulator has the ability to work with both single-phase and three-phase AC networks, and, accordingly, for a single-phase or three-phase load with a total number of channels - 9 (9 single-phase or 3 three-phase loads) and allows independent control of each channel individually, while limiting starting currents and eliminates long-term operation during overload.

The unit is connected to a standard three-phase 5 or 4-wire network with a voltage of 380 V 50 Hz directly between the switching device used to turn on the load and the load.

Scheme of connection to a three-phase 4 (5) wire line and active load (incandescent lamps)

Other connection options:

Connection diagram for 3 Asynchronous motors

The controller is connected to a single-phase network with output power limitation.

Scheme of connection to a single-phase network and active load (incandescent lamps)

See all these schemes here: https://env.electricianexp.com/regulyator.pdf

It is also possible to combine the connection of load devices, such as an asynchronous motor and 6 light bulbs, 2 asynchronous motors and 3 light bulbs or a reverse circuit for connecting an asynchronous motor and 4 light bulbs. Flexible software makes it easy to configure any of the connection options. As a single-phase load, not only light bulbs can act, but also any devices operating on a single-phase AC network.

The device is based on 9 smart triac keys. Intelligent triac key is a specialized triaccontrolled by an optocoupler key. A current sensor is included in the triac circuit. Thus, an intelligent triac key is a galvanically isolated device that allows you to change the rms value of the voltage on the AC load over a wide range.

The standard key circuit provides an output power of 1.5 kW per channel and a current of 6.8 A. The limitation of the output power is mainly determined by the thermal conditions and conductivity of the power current paths.

In conclusion, I propose to get acquainted with the main parameters and technical characteristics of the voltage regulator: https://env.electricianexp.com/regulyator.pdf

Klyuev Pavel