diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Class D (http://www.diyaudio.com/forums/class-d/)
-   -   UMAC Class D? (http://www.diyaudio.com/forums/class-d/211198-umac-class-d.html)

ViennaTom 20th April 2012 07:39 PM

UMAC Class D?
 
Does anybody have experience with this technology?
Pascal - High Power Pro Audio OEM Amplifier Modules
Is there eny explanation how the control structure works? Is it patented?

ViennaTom 21st April 2012 08:22 PM

aah so many answers!... ;-)

ChocoHolic 21st April 2012 08:45 PM

One of our members seems to be working in an enhancement task force for this circuit.

http://www.diyaudio.com/forums/class...ronic-cap.html

ViennaTom 21st April 2012 08:56 PM

so the PSU for the X-Pro 3 is a single stage flyback PFC with mid-sized coil. And they claim >2KW of output power ? lool.. i guess it ll be more like a few hundreds of watts

ChocoHolic 21st April 2012 09:35 PM

I would not expect that it has PFC.
The huge caps on the primary indicate the opposite.
There seem to be two switches on the primary.
I would not expect a flyback there (neither with paralleled switches nor an asymetrical half bridge flyback), it is looking more like a typical half bridge converter. Series resonant or LLC.

The smaller transformer might be a flyback for auxiliary supplies, but that's also making me wonder, because auxiliaries could be derived from the main transformer as well.

Just buy one, examine and tell us :D

ViennaTom 22nd April 2012 09:27 AM

Quote:

Originally Posted by ChocoHolic (Post 2995394)
I would not expect that it has PFC.
The huge caps on the primary indicate the opposite.
There seem to be two switches on the primary.
I would not expect a flyback there (neither with paralleled switches nor an asymetrical half bridge flyback), it is looking more like a typical half bridge converter. Series resonant or LLC.

The smaller transformer might be a flyback for auxiliary supplies, but that's also making me wonder, because auxiliaries could be derived from the main transformer as well.

Just buy one, examine and tell us :D

Fact is, I am searching for a full bridge class D assembly to run on 175V, so I came across this part. I have good telecom rectifiers, so no need for built-in PSU.
Background of the story is: I d like to put 4 full-bridges together with my rectifiers in one case of ~4U height for a 4 ch amp (2 x RCF Event 4000 tops and 2 x 18G50 woofers). This would give a nice system for my garden home discotheque. At the moment I am more inclined to buy 4 x UCD 2K, but still thinking..... Does anyone know from where within the EU to get the UCD assemblies at a reasonable price?

ChocoHolic 22nd April 2012 10:41 AM

Quote:

Originally Posted by ViennaTom (Post 2995919)
... for my garden home discotheque.

Make sure that you always invite your neighbours :p:p

Quote:

Originally Posted by ViennaTom (Post 2995919)
At the moment I am more inclined to buy 4 x UCD 2K, but still thinking..... Does anyone know from where within the EU to get the UCD assemblies at a reasonable price?

...hypex has its price... I am not aware of discount sales channels.

ViennaTom 22nd April 2012 02:19 PM

Looking at the cost of 4 x UCD 2K, it ll maybe significantly cheaper to use 1 x UCD2K for the 2 18" in parallel and 2 x UCD700 half bridges for the Tops....hmm... still plenty enough power and headroom for this system, but less versatility for other systems...

dimitri 15th December 2012 11:08 AM

Quote:

Is there eny explanation how the control structure works? Is it patented?
US pat 7893743


All times are GMT. The time now is 02:11 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