When I run my motor on higher speeds the current draw is much higher than expected.
I have a lowpass filter on the current sense (16kHz) that have some delay.
Now I wonder if the FOC algorithm needs to see the current correctly in every PWM period or if its the slower envelope that is used?
One degree of rotation is 13.9us at 12krpm, does the delay of some electrical degrees mess up the control?
- Signal envelope.png (49.74 KiB) Viewed 2091 times
Scope picture of current in motor wire and signal to ADC.
- Phase A current and signal to ADC.png (57.15 KiB) Viewed 2091 times