Posts Tagged: smart charging systems

How the Field Coil Controls Alternator Output

Field Coil Control: How Alternators Adjust Charging Rate Quick Summary The field coil is the electromagnet inside the alternator’s rotor, and its magnetic strength directly determines how much electrical power the alternator produces. In modern vehicles, the charging system constantly monitors battery voltage and adjusts the alternator output by controlling the current through the coil. When the regulator increases the current, the magnetic field strengthens, and the alternator produces more electricity. When the regulator reduces current, the magnetic field weakens and the alternator output drops. Today’s charging systems use high-speed … Read More