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

Table 4

Speed Error.

Result	SMO	STA-SMO	AFG-STA-SMO	Unit
Error (a)	35	3	0.15	Rpm
Error (b)	45	3	0.25	Rpm
Error (c)	40	3	0.6	Rpm