 How much AC is normal in a charging circuit? |
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| ArtechnikA |
 Aug 3 2011, 07:54 AM
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rich herzog  Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None  |
Replaced a shorted-cell battery in a friend's truck yesterday and went looking for reasons why it might have failed (other than the usual team of Age and Heat).
Charging circuit was putting out a nominal 13.6VDC but also 30VAC (p-p, so roughly 20rms). This seems a lot but I checked 3 other vehicles and they _all_ had ~30VAC ripple - so I have to gather that's "normal". Is it? I've never seen a spec for AC ripple. I know that diodes either short (bad scene - coil wires remain energized...) or open - causing lots of ripple - but what's 'normal' ? |
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Posts in this topic
ArtechnikA How much AC is normal in a charging circuit? Aug 3 2011, 07:54 AM
underthetire I havn't seen a spec either, but being there a... Aug 3 2011, 08:26 AM  |
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