I. Tamrakar et Op. Malik, Power factor correction of induction motors using PWM inverter fed auxiliary stator winding, IEEE EN CON, 14(3), 1999, pp. 426-432
A scheme for power factor correction of an induction machine by using an au
xiliary stator winding in conjunction with a PWM voltage inverter and a cap
acitor on the de side of the inverter is described in this paper. The opera
ting principle of the proposed scheme is explained and a criterion is devel
oped to select the optimum value of the power factor at which the scheme gi
ves best performance. Simulation and experimental studies show that the har
monic components in the PWM output voltage can be reduced to get nearly sin
usoidal current.