Part Number: INSTASPIN-BLDC
Hello,
I'm trying to run 2 BLDC motors using the lab6e example. I need to recalculate the Rs before every start and I enable this in the code with this line:
EST_setFlag_enableRsRecalc(estHandle[mtrNum],true);
However, the calculated Rs value is different each time and sometimes the value is more or less close to the measured value of 0.24 (calculated with lab2c) but most of the times it is way off, in the range of 1.8 to 3.2.
Any ideas about how could I get a reliable Rs recalculation every single time?
If I use the value calculated in Lab2c, the motors run more or less fine but they don't start reliably at very low rpm.
Also, what I have noticed is that sometimes, when the calculated value is off (way different than the one calculated in Lab2c), the motor runs much smoother at very low rpm. So... maybe the value calculated in Lab2c is not the correct one. I really don't know which is the correct value as I don't have full specs for these motors.
The board I'm using is a BoostXL DRV8301 Rev.B attached to a F28069M LaunchPad and the motor is a small brushless inrunner motor with 2 poles and rated for 2700KV. I need to run this motor from 60rpm up to 10000 rpm. I can to that with a simple brushless controller with an AVR or Microchip MCU but have not been able to do it reliably using Instaspin.
I would really appreciate any help.
Thank you in advance,
Colin