Other Parts Discussed in Thread: MOTORWARE, DRV8303, DRV8301,
Good afternoon,
I'm revisiting an old BLDC motor controller project and trying to reduce the current consumption when running at full load. I've ported my old hal files (in v14) to the latest v18 of motorware and have the lab01b project running with my motor. Interestingly, I'm seeing an unusual current ripple in one of the three current measurements (see below). I wanted to reach out to see if anyone had ideas as to why I'm seeing this affect, and if there could be anything to change either in hardware, or software settings that can mitigate this affect. The PWM outputs from the SVGEN match the example in the lab tutorials, but the current looks quite different.
I should mention that the current in phase A is amplified by an external amp, while the current in phases B and C are amplified in the DRV8303 chip. I've attached a screenshot of the schematic for phase A. Please let me know if you have any ideas.
Best regards,
Chris