PeachParts Mercedes-Benz Forum - View Single Post - Alternator producing 30 amps/idle

oldtrucker · #10 01-23-2015, 01:18 PM

The automotive charging circuit is "dynamic" not static!
Until the regulator takes the alternator out of the circuit, there will be a current flow.
The voltage always goes hand in hand with the current.
For example: If my battery is at 12VDC and the Alternator produces 14VDC after rectification, there is a 2VDC potential difference. Current will stop to flow only, if the circuit is disconnected (Regulator will do that) or the Battery has reached 14VDC and the circuit is still closed. With battery at 14VDC and the Alternator producing 14VDC there is no potential difference anymore and current will stop flowing.

This is what the ohms law is all about, trust me, it doesn't matter if it is applied in vehicle, a TV, a computer or any other electrical consumer, it will be the same law.