Direct Torque Control Induction Motor Drive with Improved Flux Response

Figure 15

Experimental results showing stator flux distortion due to inaccurate sector estimation with LPF (a) stator flux, (b) stator flux sector, (c) an improved stator flux estimation in Mod. LPF method, and (d) stator flux sector.

(a)

(b)

(c)

(d)