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Class D Switching Power Amplifiers and Power D/A conversion

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Old 6th August 2005, 12:15 AM   #11
Alme is offline Alme  Ukraine
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To Ajazz: really interested! I have sent you e-mail.

To theAnonymous1: even better situation with American mains standard. You can use 200V type mosfets in full bridge configuration for the same power, this type allows even higher efficiency. For example FQA34N20, STW34NB20.
But be really careful with such things, use large 1:1 isolation transformer during testing!
Do not attempt to build it not having experience with mains devices design: it is potentially dangerous
 
Old 6th August 2005, 02:51 AM   #12
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I'm a little shocked such a thread hasn't been moved..

heh... darwin, yup.

But hell yeah of course I'll take the schematics, please email.

I just can't picture how this could sound good at all though. It would have to be more complex than just a set of caps across the mains be serious.

Why not do like another patent and drive the voice coil directly off the mains????? Filter free and full bridge style, let's get wild! heh

Can't you get isolation xformers that are like 20 000VA and even more? Ooooohh you're using the one outside aren't you LOL. Thaat's crazy, I love it.

To switch power at higher frequencies you need high current drive... that's not typically an IC.

How about paralled multi-phase smps's to generate a pure tightly regulated dc current source with tight power factor correction, and then the self oscillating amplifier(s).



Regards,
Chris
 
Old 6th August 2005, 08:43 AM   #13
Kenshin is offline Kenshin  China
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I have never seen such a striking, dramatic, spectacular...thing about electronic DIY. It's more shorking & crazying then any crazy DIY electronics I knew...e.g. Teslars or the coin shrinker.

The latter is mainly an abuse show of bulky power discharging, but this thing ... really a powerful & skillful & fast slashing swordman, killer BATTOUSAI !!
:sword:

Take care, the project is a REAL SWORD SHOWDOWN and you have only one chance to make mistakes ... see the thread
Safety Practices, General and Ultra-High Voltage
it's a top thread of tube forum.

ps: I'm interested about how did you drive the gates? There's no fast IC suitable for class D applications at 320V DC, so...use opto coupler or transformer ?

Regards,
Kenshin.

maybe I should abandon this name "Kenshin" and send it to you since you did the BATTOUSAI thing
 
Old 6th August 2005, 10:10 AM   #14
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Alme: Please be careful, if you don't have a mains isolating transformer, you may have mains voltage all over your audio system.

This can kill you!

So please take care of yourself, and use a transformer.......
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Old 6th August 2005, 10:14 AM   #15
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As always, we DO NOT condone discussion of amplifiers that are directly connected to the mains, therefore this thread is closed.
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