PD or Iota for my upgrade?
I'm thinking about a converter and battery upgrade. The batteries will be wet cell lead acid 6 volt Possible T-105s or the 230AH, EGC2 from Sam's club. I'll probably go for four. (Does nayone have...
Forum Discussion
Salvo wrote:
The transformer (T1) spec is in the patent. pwm_max = 80% is a conservative guesstimate. It's impossible to get to 100%. The switching fets get simultaneous conduction and bad things happen. The Unitrode controller chip has a programmed dead zone time to prevent 100% duty cycles.
I missed the transformer spec in the patent. The dead time I calculated as between 17.3 (using their simple analysis) and 23 microseconds (with the more complex analysis, but making some guesses about current levels) out of a 10kHz (100 microsecond) cycle, so you're right on the money at 77% to 83% max.
BTW, I started designing dc/dc converters over 20 years ago using the Unitrode UC1824 controller. The hardware flew into outer space.
Cool!
