Source for repairing automotive electrical equipment and charging batteries. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Chargers, batteries, galvanic cells
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For stationary repair of various electric drives, switches, electric pumps, and other equipment of modern cars, a laboratory current source is required, from which it would be possible to power the repaired device or charge the battery.
The current consumption of automobile drives can reach several amperes, and even a dozen amperes, which makes most of the laboratory current sources popular among radio amateurs unsuitable for such purposes. Therefore, they usually use a fully charged starter battery, or a charger built according to the "network transformer - rectifier" scheme. But this is not always convenient, especially if you need to check the operation of a certain device in a wide range of supply voltages.
Trying to convert a transformer charger into a regulated power supply in the traditional way, by installing a constant voltage transistor regulator at the output, leads to some difficulties associated with high output currents, the danger of short-term load current surges and short circuits.
In the event that it is not the output voltage of the charger that is regulated, but the alternating voltage that this charger is powered by.
For this, a simple triac power regulator will suffice, and through it apply voltage to the primary winding of the charger transformer.
In such designs, you can use any other triac or thyristor power controller for electrical appliances with a power of at least 600 watts.
The device can be used not only for equipment repair, but also for charging batteries.
Author: Shelestov I.P.
See other articles Section Chargers, batteries, galvanic cells.
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