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Author Topic: Voltage Regulator connections  (Read 1998 times)
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impaw
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« on: 26 November, 2023, 08:27:07 AM »

Hello,

As I currently have my engine on a stand, running well, I thought it would be good to test that the dynamo an voltage regulator does a good job.

D+ from the dynamo, does that go to the "+" on the underside of the regulator, and DF on the dynamo to the other connection underside the regulator?
...and then 61 and 51 on the regulator to the battery?


* Skjermbilde 2023-11-26 kl. 09.24.35.png (3844.59 KB, 1256x1459 - viewed 115 times.)
« Last Edit: 26 November, 2023, 07:58:40 PM by impaw » Logged

Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
impaw
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« Reply #1 on: 27 November, 2023, 04:57:14 PM »

hmmm
I think I am wrong about these connections.
If somebody have the time, could they check where D+ and DF from the Dynamo go on the voltage regulator?
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Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
Kari
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« Reply #2 on: 28 November, 2023, 08:14:24 AM »

Please take a picture of the underside of the voltage regulator and post it here.

Karl
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impaw
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« Reply #3 on: 28 November, 2023, 08:59:21 AM »

Hi,
Picture attached.
One of the connectors has a "+" mark, the other seems to be unmarked.

As I understand it 51 is the output from the regulator, and 61 is for the charging light.

So my bet, as of now is

Dynamo "D+"   -> VR "+"
Dynamo "DF"  -> VR unmarked on underside


* IMG_0583.JPG (2379.6 KB, 4032x3024 - viewed 109 times.)
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Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
Kari
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« Reply #4 on: 28 November, 2023, 10:00:44 AM »

Your bet is right. Make sure all ground connections exist and the other wire from the charging lamp is connected to ignition+ (15)
Is it a Bosch regulator?
Karl
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impaw
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« Reply #5 on: 28 November, 2023, 10:02:29 AM »

Great, thank you!
It is a Marelli regulator

IŽll try to hook it up in a day or two and see if I can get some charging.

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Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
impaw
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« Reply #6 on: 11 May, 2024, 08:06:52 AM »

Others parts of the project got in the way, and I have not made this work yet.
I suspect the regulator is faulty, but in order to rule out the dynamo- how much voltage should the dynamo itself make, without the regulator attached?
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Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
impaw
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« Reply #7 on: 11 May, 2024, 10:26:22 AM »

…. Measured about 60mV between the two connectors on the dynamo, at idle, and about 250mV at 3000rpm
« Last Edit: 11 May, 2024, 10:32:49 AM by impaw » Logged

Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
chriswgawne
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« Reply #8 on: 11 May, 2024, 03:39:39 PM »

Over the years I have tried to find to find someone somewhere in Europe who can repair the OE Aurelia Marelli voltage regulators without success.
So these days, if I have a problem I fit a modern sold state regulator inside the original Marelli casing which has been well described by Tim Heath in the UK LMC magazine and also on this Forum I recall.
The dynamos themselves rarely need more than new bearings and brushes.
Chris


* Aurelia voltage reg Marelli conversion.jpg (1684.5 KB, 2303x3348 - viewed 92 times.)
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Chris Gawne
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« Reply #9 on: 11 May, 2024, 05:14:21 PM »

That's very useful Chris, thank you, can you let me know which edition Tim's update appeared in?

P
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Frank Gallagher
impaw
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« Reply #10 on: 11 May, 2024, 05:34:57 PM »

Thank you Chris, this sounds like the way to go!
Thank you
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Torstein

1955 Aurelia B20
1966 Fulvia
1966 Fulvia rally/race car
lancialulu
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« Reply #11 on: 11 May, 2024, 08:27:44 PM »

I agree!
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