Alternator overvoltage protection
Alternator overvoltage protection
Does the 2004 Q45 alternator/charging system have any kind of over-voltage protection?
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Q451990
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Re: Alternator overvoltage protection
to NICO!Good question... and honestly I have no idea. Maybe you could fill us in on what issue you're chasing and we could help better? Also, the factory service manual may answer your question - available at www.infinitiservicemanual.com
Good luck!
Heath
Re: Alternator overvoltage protection
Pretty sure every modern alternator has a "voltage regulator" built in.
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Skibane
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Re: Alternator overvoltage protection
Yep, the regulator is designed to keep the alternator's output voltage within a safe range.qship96 wrote:Pretty sure every modern alternator has a "voltage regulator" built in.
Most regulators are designed so that if they fail, they kill the alternator's output, rather than allowing it to go full-tilt. So, your engine eventually dies when the battery runs down, but nothing else gets ruined due to excessive voltage.
There is also a sense wire between the regulator and battery - The regulator uses it to measure and adjust the amount of charging voltage being applied to the battery. Most regulators are designed so that if this wire ever opens up, the maximum alternator output voltage is limited to some reasonable value, rather than going through the roof.