rickyjar
Member level 2
User “Kaeltaz” presents his construction of an automatic rectifier with a regulation 0-15A. It is automatic because after charging a battery up to 14.4V, it turns off on its own. When voltage drops below 13.8V, it turns on. The rectifier turns on from circa 6V on crocodile clips. It is safe because without connecting a battery, the rectifier does not transfer voltage, which means that it is resistant to short circuits (without the battery). The rectifier is also resistant to a reverse connection of the battery, which means it is foolproof. If there was a need to something that is not a battery, a switch allowing voltage transfer to the clips was made, then the rectifier can be used as power supply. A fan to cool overheating elements was used. The fan is equipped with a control, which means that at the beginning it spins slowly, and with a temperature increase in the heat sink, it spins faster. Current resistance is adjustable from 0A to 15A. The temperature diode is blank because a thermal fuse is supposed to be added in the future.
Expenses:
Of course, the most expensive part is the transformer. Recycled parts can be used as well.
Photos:
Link to original thread - Prostownik 15A automatyczny bezpieczny by Kaeltaz