Quote:
Originally Posted by GriffinRU
Luciano,
From 50 fet's (300 total) to 8 fet's (48 total, Tekin R1PRO) your dynamic losses falling from ~20W to 3.2W, pcb can absorb that. Conduction loss at 100Amps @25C with 8 fet's ~2W -> as you can see great combo.
Dynamic losses are small with less fet's and becoming dominant with more, so balance should be found in-between on design stage. Where entire ESC been layout and verified step-by-step, you just cannot add fet's boards without penalty.
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Lets assume you have a quad power board R1, would that make less then the 3.2W of dynamic loss? The controller will have more FETs and each one would be working less to make the same amount of power that a single or double power board controller would be. Another example which is completely off topic would be in car audio. I had a 4 woofer set up in my car and it was loud (Load enough to have neighbors complain that things were falling from their furniture's
), but then I went up 4 more for a total of 8 woofer wired for the same load to the same amp and it was blistering loud. Each woofer was getting less power from the amp, but they were putting out higher db at the same time. The design that I have in mind (Artur I will send you 2 examples via e-mail) will be a total of 240 small FETs with a datasheet rating of 10A each and they come in 30V and 60V. Each power board will have 80 FETs so 40 in the H-Bridge you mentioned in another post. I'm just throwing out ideas basically to see a rock solid controller that is better then a Schulze 40.160, but a tad smaller for around the same price.