badgineer
10 W
See the email I posted earlier from flipsky. Its based neither on 4 nor on 6, it's based on 75_300bhartshorn said:Been out of this game a little while so I can't tell - is there any indication whether this controller is based on VESC4 or VESC6?
https://vesc-project.com/node/311 -> all open source VESC schematics (afaik)
district9prawn said:The controller losses will not be different when running at say 25% and 50% duty, assuming phase current is the same. Switching frequency is always the same and if the phase current is the same mosfet conduction losses will also be similar.
Yes, as you correctly pointed out - if phase current is the same.
But if you also increase the number of turns in the motor coils (so you have the same top speed) you need less phase amps for the same power output. (Later Edit - I removed some totally incorrect stuff from this phrase)
So, in the end, if you also redesign the whole system around the higher voltage, (altering just the number of turns in the motor windings, so the top speed is the same) you need less phase amps for the same power / torque output, so conduction losses in controller mosfets and phase wires (assuming the mosfets and phase wires stay the same) are lower.
But then again, if you also have a controller designed for your voltage, higher voltage FETs have higher rdson, so the fet losses difference also disappears. And all you're doing is slightly changing the losses in the phase wires :lol:
No free lunch here. Bummer.
Br,