Capacitor pre charge every time? - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th December 2008, 07:54 PM   #1
diyAudio Member
 
Join Date: Dec 2008
Default Capacitor pre charge every time?

I have a system where the power is disconnected between uses.
I just bought a capacitor and it say it must be pre charged before use. Am I going to have to precharge it everytime I use the stereo, or will it holds its charge for a few weeks?

I wish I had bought a soft start capacitor instead.
  Reply With Quote
Old 12th December 2008, 08:49 PM   #2
grjr is offline grjr  United States
diyAudio Member
 
Join Date: Sep 2007
Depends on the capacitor. If the capacitor has a lot of leakage then yes you will have to charge it. If it does not have a lot of leakage then you probably won't have to. If you leave the capacitor connected to the amplifier it will likely discharge over time.

If you don't first charge the capacitor through a resistor when you first connect it, the capacitor will draw a lot of current very quickly and you will get a large electrical arc at the connection point which will melt the metal at the connection point.

I'm not talking about the connection melting down in your hand, I mean a small localized area of metal will melt where the arc occurs.

You can measure the voltage at the capacitor with a volt meter to determine how much of a charge the capacitor has on it before changing connections.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
how do i charge a capacitor? Infinity_Addict Car Audio 18 30th August 2010 08:26 AM
can a capacitor put charge into a battery? Clipped Car Audio 3 25th August 2008 03:43 AM
capacitor life time: what does it really mean? jarthel Parts 5 18th July 2006 05:59 AM
capacitor charge question Thomas001 Parts 2 21st November 2004 07:25 PM


New To Site? Need Help?

All times are GMT. The time now is 08:57 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2