Higher-Order Sliding Mode Observer for Speed and Position Estimation in PMSM

Figure 5

Estimation using conventional first-order sliding mode observer under no-load. (a) Estimated currents. (b) Estimation current error. (c) Estimated back EMFs. (d) Estimated speed. (e) Estimated rotor position. (f) Estimation rotor position error.

(a)

(b)

(c)

(d)

(e)

(f)