So basically you measure the voltage, multiply it by your
proportionality constant (and "DC-servo" load voltage), and set the PWM
on-time to this value. Correct?

-
Martin K

Olin Lathrop wrote:
> Dave Tweed and I were finally granted US patent 7,411,378 last week on our
> power factor correction circuit.  The basic concept is to use digital
> computation to know what currents are flowing in various places so that
> there is no need to measure them.  Our circuit is controlled digitally, and
> the controller only receives measurements of the voltages, not any currents.
> There are various ways to measure current, but it's always a bit
> inconvenient.  Our scheme gets around this requirement.
>
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