10,000 watt class D amp - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 6th May 2009, 11:36 PM   #1
diyAudio Member
 
Join Date: May 2009
Default 10,000 watt class D amp

Hi Everyone,

I'm new here, but found this blog because I have been researching a nasty problem and found a lot of good information here already. But I could sure still use some help!

I'm trying to design a testing apparatus that needs to develop sound levels pretty close to what you would get if you were standing next to a Shuttle launch. Specifically, over 150 dB, but at frequencies from about 2 Hz up to 500 Hz. This will be "pink" noise, so great fidelity is not a requirement. I've found some speakers, Kicker SoloX 18s, that can take 10,000 watts . . . briefly. I only need to turn these guys on for about 10 seconds, max, and there will be four of them. Then they get a chance to cool down a bit.

My first thought was a full bridge (H-bridge) with some high current MOSFETS driven by a PWM scheme of some sort, and I did locate a few chips to do some of the heavy lifting on the front end of that. BUT you guys have a LOT more experience with high current amps than I do, so how would you go about this problem? Which chips would you use for the PWM? Can you recommend some MOSFETs for the H-bridge? Gate drivers? Am I crazy for trying this?

Thanks for your help!

BillyDoc
  Reply With Quote
Old 7th May 2009, 08:47 AM   #2
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
There a a lot of subs that can take 10kw, Ground zero, kickers, Digital Designs, Audiopulse and maaaany more...

all that are used dB drag races, car audio...

If you think you will design 10kw amp yourself, well you have a looong way before that, it could be cheaper and way faster to buy one or two that will do that..

So how are they powered? 12vDC, 120/230vAC?
I mean you have some options on your hands
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 7th May 2009, 10:04 AM   #3
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
Billy!

I'd suggest using IGBTs (eg. IRGP50B60, maybe paralelled), or if you stay at MOSFET, then you have to use BCA topology.

Optimal supply voltage is somewhere around 400...550 V, so you need 8 ohm impedance. IR2113 is a good driver, however there is a problem with very narrow pulses, so you have to limit duty cycle!
  Reply With Quote
Old 7th May 2009, 10:07 AM   #4
Eva is offline Eva  Spain
diyAudio Member
 
Eva's Avatar
 
Join Date: Oct 2003
Location: Near the sea
Send a message via MSN to Eva
Do you need to generate that SPL in a room or open field? At which distance from the source?
__________________
I use to feel like the small child in The Emperor's New Clothes tale
  Reply With Quote
Old 7th May 2009, 11:06 AM   #5
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
It's possible only in a closed box.
  Reply With Quote
Old 7th May 2009, 11:22 AM   #6
Eva is offline Eva  Spain
diyAudio Member
 
Eva's Avatar
 
Join Date: Oct 2003
Location: Near the sea
Send a message via MSN to Eva
With a few bass horns you can have 145dB at 1m down to 30-40Hz, open field. Built with readily available materials.
__________________
I use to feel like the small child in The Emperor's New Clothes tale
  Reply With Quote
Old 7th May 2009, 11:55 AM   #7
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
2 Hz
  Reply With Quote
Old 7th May 2009, 12:00 PM   #8
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
14000 watts

http://www.labgruppen.com/products/f...ies/c/fp_14000

2 Hz and 150 dB? Have you really thought about this? How does your speaker look like?

Curious, but what is your application?
__________________
/Per-Anders (my first name) or P-A as my friends call me
Super Regulator SSR03 Group buy
  Reply With Quote
Old 7th May 2009, 12:17 PM   #9
acid_k2 is offline acid_k2  Italy
diyAudio Member
 
Join Date: Oct 2006
BillyDoc,
are you talking about a dB drag race?

if yes, you need something to make only a loud noise. IMMO it's something different to audio devices. If you know words like "150 db" and "10000 watts", and you don't know words like THD, Xmax and clipping, you don't need an amplifier. You need something to make noise. And you're a lucky guy, because building a raw noise maker is simplier than building an good audio amplifier.

if not, you need it for audio. Maybe someone sells some good 10kW amplifiers in this world, buy one of them. It's simplier, cheap, less time-wasting and less dangerous. IMMO.
  Reply With Quote
Old 7th May 2009, 12:58 PM   #10
Gyula is offline Gyula  Hungary
diyAudio Member
 
Gyula's Avatar
 
Join Date: Feb 2004
Location: Kunszentmárton, Hungary
Send a message via Yahoo to Gyula
If you have to generate only loud noise, I would suggest you alternative and much cheaper solutions. E.g. you can remove the exhaust pipe from your car's engine and connect exponential cones directly to the outlets on the cylinder head. Then start the engine and push the pedal.
  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
pass 20 watt class a amp_guy Pass Labs 1 17th October 2004 09:38 AM
JLH 10 Watt class A amplifier #2 DomKo Solid State 8 30th October 2003 11:32 AM


New To Site? Need Help?

All times are GMT. The time now is 03:42 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