Hi Jeremy,
Increasing Ld inside the Flux Observer can appear to improve torque‑per‑ampere (lower Iq for the same load) because it changes the internal decoupling and back‑EMF, shifting the estimated electrical angle closer to the true rotor position when your nominal parameters are biased. That effect shows up on hardware (with inverter non‑idealities, sensor offsets, temperature drift, magnetic saturation, delays, etc.) but not in an ideal simulation, so it’s more a parameter‑mismatch compensation than the true motor Ld being 2×. The right fix is to calibrate and/or adapt parameters and tune the observer/PLL for the real plant.
