Power regulator for GRN-1-220, 400-2000 watts. Scheme, description

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Power regulator for GRN-1-220, 400-2000 watts. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Regulators of current, voltage, power

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A fairly simple regulator of the power supplied to the load can be made using the GRN-1-220 phase regulator module. It is designed for smooth adjustment of the brightness of the glow of incandescent lamps, the temperature of electric heaters (for example, a soldering iron, etc.), and also allows you to adjust the frequency of rotation of collector electric motors. The voltage supplied to the load is controlled by changing the switch opening delay relative to the moment the voltage passes through "0". The small dimensions of such a device make it easy to place it anywhere.

The main technical parameters of the regulator:

mains voltage ..... 220 V ± 20%;
load current ..... up to 2 A;
adjustment range of the effective voltage on the load ..... from 0 to 97%;
load power ..... up to 250 W without a heat sink and up to 400 W with a heat sink;
operating temperature range -40...+70°С.

The control circuit itself is quite economical and consumes only about 0,7 mA. In this case, the maximum voltage is supplied to the load when the resistor R1 has zero resistance.

Typical switching circuits for different load power are shown in fig. 2.17 and 2.18. When the regulator is operating on an inductive load, it is necessary to connect a series RC circuit in parallel with it.

Power regulator for GRN-1-220, 400-2000 watts
Rice. 2.17. Regulator switching circuit for loads up to 400 W

To control a powerful load, you can use the diagram in Fig. 2.18.

Power regulator for GRN-1-220, 400-2000 watts
Rice. 2.18. Scheme of switching on the regulator for a power of 2 kW or more

In addition to those shown in the figure, many other types of triacs can be used.

Based on this module, it is easy to make a light switch activated by the illumination of the photosensor (Fig. 2.19).

Power regulator for GRN-1-220, 400-2000 watts
Rice. 2.19. Light switch activated by lighting

The tuning of the circuit is carried out when the photoresistor R2 is darkened with the help of the resistor R1 so that the lamp EL1 does not light up.

When light appears, transistor VT1 opens and shorts R4, which causes the lamp to glow.

Author: Shelestov I.P.

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