the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

alternator ripple


Post ReplyPost New Topic
< Prev Topic Next Topic >
reax222 
Copper - Posts: 220
Copper spacespace
Joined: March 11, 2006
Location: United States
Posted: November 01, 2008 at 6:32 PM / IP Logged  
I have a fluke 117 which does frequency and I was curious if it would be able to detect alt ripple. If the battery is in good condition, I wouldn't expect it to, but if the battery was weak or failing, then would it pick up ripple as a frequency?
Because it's three phase and the mostly cut off, there wouldn't be much amplitude to the ripple. Because of the three phase, I would expect the frequency to be 1/3 of the engines rpm or pretty close. It would be a decent test for a bad diode or a poorly filtering battery?
i am an idiot 
Platinum - Posts: 13,693
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: November 01, 2008 at 6:45 PM / IP Logged  

I really doubt there will be enough amplitude for the meter to pick up.  If it were able to pick it up, Just looking at the size of the pulleys, I would think the alternator would turn at least twice as fast as the crankshaft.  

You would probably have better luck reading AC voltage at the alternator.  I am not familiar with the 117 but if it has an AC  Millivolt setting you should be able to get a reading there.


Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Thursday, October 31, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer