[Amps] OM power power supply design

[Hsu]

Indeed, the OM's transformer is a unique design, the toroidal cores  are light than EI cores
 and two transformers  disperse weihght,it make possible to ship with amplifier togeter and needn't pull 
the transformer from amp like other amp.
 But I do think it have  greater the Ampacity the lower the impedance and better the load 
 regulation.You can calaulate the energy  in capacitor, E=1/2CU^2, 8X250V and a single 2000V  secondary coil
if they use same 8 capacttor, the engery are same.Who can explalin this?
        73!Hsu
----- Original Message ----- 
From: "Ron Youvan" <ka4inm at tampabay.rr.com>
To: "amps" <amps at contesting.com>
Sent: Wednesday, December 09, 2009 10:40 PM
Subject: Re: [Amps] OM power power supply design


>> Last night I came across these schematics from OM Power.
> 
>> They use 8 250v  windings, rectified, in series. Seems ingenious as
>> that would lower the costs for the transformer, and it makes the use
>> of toroidal cores an option.
> 
>   This design (old) has the advantages of using 1 kW diodes and 300 Volt capacitors and 
> if a diode shorts and blows it's fuse, the remainder of the power supply keeps operating 
> at the reduced Voltage.  The windings all need to be insulated for over 2 kV.  I don't see 
> where the transformer would be cheaper, every "Voltage level" would need to be insulated.
> "toroidal cores an option" ???  This design could be produced with 8 identical 
> transformers (or 4 with two windings each) of any style.
> 
>> What would be the drawbacks of copying such a design? Should each of
>> the windings deliver the required current or should there be a safe
>> margin?
> 
>   Users choice, the greater the Ampacity the lower the impedance and better the load 
> regulation.
> -- 
>    Ron  KA4INM - I'm proud to be Chuck's pop!
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