Direct Torque Control Induction Motor Drive with Improved Flux Response

Table 2

THD of stator current at different loadings.

Integration algorithm	Total harmonic distortion (in percentage)
	100% load			30% load
	Refrence stator flux			Refrence stator flux
	1.0 wb	0.8 wb	0.6 wb	1.0 wb	0.8 wb	0.6 wb
Mod. low pass	8.3	5.8	3.3	8.9	9.5	7.3
low pass	11.4	8.2	5.1	12.1	11.8	9.2
Pure integrator	13.8	12.4	8.2	14.5	14.7	12.2