Other Parts Discussed in Thread: DRV8312
Hi all:
I am using DRV8312 kit to run Universal Motor Control Lab and the settings are basically finished. Everything went good in Lab1 but I met some problems in Lab2.
1. FAST observer is adopted. After started, the motor is spins smoothly. I have checked the ADC results through EPWMDAC and graphs, the waveforms are good.
However the motorVars_M1.speed_Hz is abnormal as it jumps from -1000 to -4000 and motorVars_M1.speedRef_Hz is 40Hz as default. Besides the motorVars_M1.angleEST_rad comes from FAST observer is always +inf. I don't know what may cause this.
2. Another point that I am confused about is the offset for voltage(which is 0.5 in the project). In Lab1, that did not bring the V_V value close to 0. Instead, I got -7.5V with a 15V VdcBus.
In Lab2, the picture from the guide shows that the phase voltage is always below 0. Is that how the phase voltages are sent into FAST? Why not a waveform with no DC bias?
