Hi Cedric,
no, i just use tiny motor with little power supply, because my final product would like to handle 100A, so I replaced the shunt resistor with 0.001 ohm and change offset circuit's resistor according to MC Work bench suggested.
my problem is whenever motor started, it immediately jump to R3_2_BRK2_IRQHandler which is comparator triggered, if I increase the .DAC_OCP_Threshold = ~5000 which can startup but very easy to jump to R3_2_BRK2_IRQHandler
this doesn't make sense because my motor, my power supply and i closely monitor the current which is under 0.1A but according to the offset calculation the current to trigger comparator should be ~100A (.DAC_OCP_Threshold = 3770) but why now 0.1A can trigger it ?
Cedric, can you suggest how to narrow down or trace the problem ?
herewith I test and compare with phase current value, that's why I don't think it's caused by noise (run can run smoothly) or over-current, but why comparator be triggered ?
max_phase_current = 249
max_phase_current_a = 2.743
S16_to_A = 0.01101
AMPLIFICATION_GAIN = 4.57
RSHUNT = 0.001
ADC_REFERENCE_VOLTAGE = 3.30
/* formula: Current[A] = [Current(s16A) * Vdd micro(V)] / [65536 * Rshunt(Ohm) * AmplificationNetworkGain] */
S16_to_A = ((float)(ADC_REFERENCE_VOLTAGE)) / ((float)((float)65535 * (float)RSHUNT * (float)AMPLIFICATION_GAIN));
phase_current = MC_GetPhaseCurrentAmplitudeMotor1();
phase_current_a = (float)phase_current * (float)S16_to_A;
if (max_phase_current < phase_current) {
max_phase_current = phase_current;
}
if (max_phase_current_a < phase_current_a) {
max_phase_current_a = phase_current_a;
}
MC_ProgramSpeedRampMotor1(1500, 100);
MC_StartMotor1();
