Part Number: TIDA-01606
Other Parts Discussed in Thread: SFRA,
Tool/software:
In Lab 3 of the manual, since the control target is the id current, we are asked to modify the following Kp and Ki values:
#define TINV_GI_PI_KP ((float32_t)0.3)
#define TINV_GI_PI_KI ((float32_t)0.0120860479)
In Lab 4, the control target is also the id current, so I tried modifying these values. Because there was a current sag (tested up to 3 kW), I tried increasing Ki from 0.012 to 0.024 and 0.036, and also tried decreasing it from 0.012 to 0.008 and 0.004. However, the degree of current sag remained the same. In the waveform, green is the phase-a grid voltage, yellow is the phase-a output current, and red is the phase-a lower bridge PWM signal. Since the waveforms looked the same for each test, I am only attaching one image
.
If I want to modify Kp and Ki to adjust the waveform, should I adjust TINV_GI_PI_KP and TINV_GI_PI_KI?
Since the F280039C does not provide the SFRA, if I need to reference closed-loop bode plots to design PI control, should I refer to the diagram on page 35 of the 10kW TIDA-01606 manual?
