Warpspeed
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Yes, DCM is pretty violent, but I can get away with it because my current is low.
At less than full output, even CCM will revert to DCM which creates some problems with the transition, and loop stability.
I decided to just stay with DCM all the way, as its going to operate DCM at very light loads anyway.
Here is shot of my inductors that have been hiding out of sight.
These are U cores with cross sectional area of 30mm x 30mm.
Air gap is 3mm and 18 turns on the main buck boost flyback winding to produce +235v, and an 18 turn secondary winding to produce -235v.
Switching frequency is 20 Khz and the two interleaved windings are five thou copper foil 35mm wide which are good for about 18A rms.
These enormous things run stone cold and saturate at about 55A.
They are larger than necessary, but I used what I already had rather than buying something.
The eight ugly black wires are from my four groups of solar panels. (east, west, north, and up)
At less than full output, even CCM will revert to DCM which creates some problems with the transition, and loop stability.
I decided to just stay with DCM all the way, as its going to operate DCM at very light loads anyway.
Here is shot of my inductors that have been hiding out of sight.
These are U cores with cross sectional area of 30mm x 30mm.
Air gap is 3mm and 18 turns on the main buck boost flyback winding to produce +235v, and an 18 turn secondary winding to produce -235v.
Switching frequency is 20 Khz and the two interleaved windings are five thou copper foil 35mm wide which are good for about 18A rms.
These enormous things run stone cold and saturate at about 55A.
They are larger than necessary, but I used what I already had rather than buying something.
The eight ugly black wires are from my four groups of solar panels. (east, west, north, and up)
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