Re: Solid-state TC - transformer design

• To: tesla-at-pupman-dot-com
• Subject: Re: Solid-state TC - transformer design
• From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
• Date: Fri, 25 Oct 1996 20:49:28 +1200

I have a fundamentally simple answer to this problem (rather trickier 
to implement but still in the SMPS domain)......

>    I'm going to use a 10 ohm 225w power resistor placed before the
> filter capacitors in the circuit to limit the rate of charge to the
> capacitors. In previous circuts I blown the bridge rectifier even though
> it was a high current, high voltage type! The filter caps are two 4500uf
> in parallel. I have also recently acquired a surplus 120vac variac rated
> at 45amps to control the voltage. You can disregard the filter network
> on the secondary of the output transformer because it was taken from a
> manufacturers application circuit. The mosfets I will be using are
> Harris semiconductor IRFP450s.

Do what Mark Barton did and use a power factor correction pre-
regulator.

Malcolm
 

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