The Volvo S80 Alternator is the onboard generator of the sedan, the one that operates every single electrical system, including the headlights and the infotainment system. The housing is made of two aluminum parts that shield the stator windings and a belt-driven rotor. A front-mounted cooling fan and pulley rotate with the crankshaft belt, and a bearing maintains the shaft in a straight line. At the rear, the other bearing connects the brushes with the diode-based rectifier as well as a voltage regulator to ensure everything fits under the hood of a Volvo. The rotor turns, and the magnetic field of the rotor passes through the stator field coils, which are stationary, and alternating current is immediately induced and converted to battery-friendly direct current. Field current control avoids overcharging and older S80 models only applied a stand-alone or in-unit regulator, but the new Volvo models allow the powertrain control module to adjust the output dynamically to provide a more stable voltage to delicate electronics. The same basic rotating field design is applied in all versions, although in a few locations certain editions experimented with magnetized rotors, sacrificing serviceability to slightly faster startup output. No matter what the year, all Volvo S80 drivers have a good Alternator that generates electricity only when required, saving engine power and fuel. This automotive Alternator is self-cooled by air entering the internal fan and engine bay, unlike giant three-phase machines found in power plants and ensures low weight and high reliability throughout the whole lineup.
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