That makes sense. What you're describing as slip control is indeed exactly what my code does. It increases slip with throttle. V/Hz is a necessary secondary component of this.EV_Builder wrote: ↑Sun Apr 17, 2022 9:14 pm Slip control I call that you measure rotor speed and depend Hz setpoint on that plus requested torque. The more requested torque the more you add. That will induce current because the motor tries to follow (maybe combined with V increase??).
But below a certain speed I would fallback on sensorless control.
As for "sensorless control", I suppose the obvious option there is simply to ignore the rotor speed at low speed, set a minimal slip, and begin to increase voltage. I believe this is what openinverter currently does, but it it my hope that I can instead extend slip control right down to stationary, and beyond into reverse.
Of course, there's real sensorless control, using the current sensors to calculate everything, but sadly nobody has ever published a working open source implementation of this.