Alternators with external regulators 16v
#1 _macdou_
Posted 07 December 2017 - 08:41 PM
Each Alternator gave results of around 16v using a volts gauge and verified this reading with a multimeter.
I also used 3 different Bosch regulators (1 x NOS) and all read the same voltage around 16v.
Is it a coincidence all three read the same voltage and are external regulators easily adjustable?
Is it a big problem the charge rate is at 16v? I thought 13-14v was the norm.
Anyhow I am no electo that’s why I am asking
Thnx
#2
Posted 08 December 2017 - 04:18 PM
Put a load on it and see what voltage it regulates at.
You do not describe how the test was conducted - in car connected to battery, @ idle.
mid 14's is normal for no load - load - headlights etc, low 13's to high 12's.
real regulators have remote voltage sensing (@the battery) this compensates for voltage drop in high load situation to maintain 12+ Volts at the battery and current sensing for load control.
Cheap digital multi-meters are "cheap" - an analogue moving iron or moving coil meter will give you a true reading.
Edited by Balfizar, 08 December 2017 - 04:28 PM.
#3
Posted 08 December 2017 - 09:54 PM
#4 _macdou_
Posted 09 December 2017 - 07:03 AM
Idle at 900rpm is 14v and increasing revs to 1500rpm it does 16v constantly. Bringing back to idle does 14v
I am confident in my gauge and multimeter as I am running a Bosch Alternator with an internal Reg and output at 2000rpm is 13.5v. Idle around 12.5v
Alternators am testing are Bosch 35a as fitted to early Holden’s. The external regulators I have used are your standard silver top Bosch units of the same era as the Alternators..
Put a load on it and see what voltage it regulates at.
You do not describe how the test was conducted - in car connected to battery, @ idle.
mid 14's is normal for no load - load - headlights etc, low 13's to high 12's.
real regulators have remote voltage sensing (@the battery) this compensates for voltage drop in high load situation to maintain 12+ Volts at the battery and current sensing for load control.
Cheap digital multi-meters are "cheap" - an analogue moving iron or moving coil meter will give you a true reading.
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