Hi,
I have some custom hardware based closely on HVKIT.
My motor is a BLDC, ~310VDC, Rs = 0.98R, Ls = 0.003H
If my DC bus voltage is about 100VDC I can ID the motor no issues, if my DC bus voltage is > ~100V then the ID fails with Rs_Ohm being some large number (1.0 e+28)
Some user.h settings:
USER_MOTOR_RES_EST_CURRENT = 1.0
USER_MOTOR_IND_EST_CURRENT -1.0
USER_MOTOR_MAX_CURRENT = 3.5
USER_MOTOR_FLUX_EST_FREQ_Hz = 10
USER_R_OVER_L_EST_FREQ_Hz = 300
USER_PWM_FREQ_kHz = 10
I feel the problem may be related to my slow 10KHz PWM, but I don't seem to have any success even if I change it to 15KHz.
Out of interest, this motor ID's on HVKIT.
Any suggestions.
Thanks
Stomp!