Direct Torque Control Induction Motor Drive with Improved Flux Response

Table 1

RMSFE for different flux estimation algorithms.

Integration algorithm	RMSFE (in percentage of ref Flux) at 80% rated speed						RMSFE at 20% speed
	100% load			30% load			100% load
	Refrence stator flux			Refrence stator flux			Refrence stator flux
	1.0 wb	0.8 wb	0.6 wb	1.0 wb	0.8 wb	0.6 wb	1.0 wb	0.8 wb
Mod. low pass	1.02	1.24	1.77	1.03	1.2	1.62	0.83	0.9
low pass	1.25	1.44	2.0	1.24	1.41	1.80	1.37	1.5
Pure integrator	2.07	2.46	3.43	2.06	2.41	3.4	1.52	1.62