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Refinement of the laboratory power supply. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Power Supplies

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In "Radio" No. 6 for 2000, an article by A. Shitov was published "Laboratory Power Supply". In this device, I changed the switching node of the secondary windings of the transformer. Its circuit is shown in the figure. When the trinistor VS1 is off, the rectifiers VD1-VD4 and VD5-VD8 are connected in parallel, and when it is on, they are connected in series.

Refinement of the laboratory power supply

This allows you to more evenly distribute the load on the transformer windings. Compared to the original, only one VD16 diode was added to the node, the connection of the VD9 diode was changed (in the diagram it is designated VD9 ') and the resistance of the resistor R2 was reduced to 18 kOhm.

The DA4 stabilizer is fed from a separate transformer winding, designed for a load current of not more than 100 mA.

Author: R.Baigabulov, Kuvandyk, Orenburg region

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