FOC poor efficiency at high speed

Discussions regarding the Field Oriented Control (FOC) implementation on the VESC.
rew
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Joined: 25 Mar 2016, 12:29
Location: Delft, Netherlands.

Re: FOC poor efficiency at high speed

Postby rew » 11 Nov 2017, 09:43

protontim wrote:I messed with the switching speed. No real effect. Still craps out around 50% duty cycle. Is there any way to start in FOC and switch to BLDC at a certain RPM??

With the current firmware: Definitively no. Switching from one side to the other in the current setup means that the "other" strategy gets to initialize all the hardware and measurements, and then gets to control them. Stuff like "command zero current and calibrate the current sensors". That's what happens when you switch from BLDC to FOC....


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