Load Current limiting - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 19th November 2004, 11:15 AM   #1
k1jroth is offline k1jroth  Finland
diyAudio Member
 
Join Date: Nov 2004
Location: tampere
Send a message via AIM to k1jroth Send a message via MSN to k1jroth Send a message via Yahoo to k1jroth
Default Load Current limiting

I`m building 2 channel amplifier to my subwoofer and
have a problem with current when amplifier is off and i turn it on.

I think load current is too much for my fuses.
Transformer is toroidal 230V 2x40 1200VA
and there is 144000uF capasitance.
input fuse is 10A slow and output fuses are 10A fast.

How can i limit loadcurrent that fuses won`t burn?

Please help!
  Reply With Quote
Old 19th November 2004, 11:27 AM   #2
quasi is offline quasi  Australia
diyAudio Member
 
quasi's Avatar
 
Join Date: Sep 2004
Location: Adelaide, Australia
Provided there are no problems with your setup it could be the in-rush that is blowing the fuses.

Try a soft start cct. Theres has been plenty of stuff here about that. Do a search for "soft start" or "soft turn on"

Cheers
  Reply With Quote
Old 20th November 2004, 07:20 AM   #3
diyAudio Member
 
Join Date: Jun 2004
Location: Knoxville
Your description is kinda vauge. Are the output fuses for the output transistors that are burning too? If this is the case, your circuit may not be balancing when initially powered up, or not biasing properly as the voltage builds. You might take a measurement of the initial current in outputs. As for the input, 1200 VA would have a lot of surge current and as Quasi pointed out, a soft start circuit would work there.
  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
LM338 Current Limiting imix500 Parts 48 22nd October 2009 12:21 PM
12V DC/DC for amplifier. Current limiting? Pierre Power Supplies 22 1st May 2007 12:46 PM
Current limiting by the PCB coil, why not? IVX Class D 3 18th December 2005 10:08 AM


New To Site? Need Help?

All times are GMT. The time now is 02:32 AM.


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