Device for protection against overvoltages generated by electromechanical systems, particularly for battery chargers with engine starters

A device for protection against overvoltages generated by electromechanical systems, particularly for battery chargers with engine starters, comprising an electronic circuit that in turn comprises a power supply (11) for a first voltage comparator (12) with hysteresis, within which the reference values of the maximum and minimum starting voltage are defined, and for a first power interface (13) that supplies a transformer (16) to which a secondary rectifier (17) and the battery load (18) are cascade-connected.