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@tampabay.rr.com>
To: "amps" <amps@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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