I found this on:
How does a smps nonlinear carrier controller work? Can anyone spare a nonlinear carrier controllers for dummies explanation? Or a link to some better reading. D from BC
yeah, Dragan did, in an older paper ;)
IEEE trans power electronics, alas cant remember which one.
heres an example. Run a DCM flyback converter from a full wave rectified supply (no cap).
run it at constant on time
know Vin = Lp*dI/dt
dt = constant
Lp = constant
dI = Vin*(dt/ton) = K*Vin
so input current peaks follow |sin| envelope. voila, control-free PFC
the NLC method uses an analogous approach. write down the equations for input current as a function of Vin, D then solve for D
Cheers Terry
Thanks for the kickstart... :) D from BC
If I run across the paper I'll post the reference. Im just too lazy to scan thru a gazillion professional comics :)
Cheers Terry
IIRC the paper is in the same directory, which is (was) browsable (???).
Have something to add? Share your thoughts — no account required.
Ask the community — no account required