Speed Sensor-Less Control System of Surface-Mounted Permanent Magnet Synchronous Motor Based on Adaptive Feedback Gain Supertwisting Sliding Mode Observer

Table 1

SPMSM parameters.

Parameters	Values
Stator resistance	2.875 Ω
Pole-pair number	4
Magnetic flux	0.175 Wb
-axis induction	8.5-3H
-axis induction	8.5-3H
Damping factor	0
DC bus voltage	310 V
Pole-pair number	4
Magnetic flux	0.175 Wb
Rotational inertia	0.001 kg·m^2