Abstract
Abstact:
In this paper a controlled static switched capacitor three-phase auxiliary winding fed by a three-phase PWM
with single-phase auxiliary winding, which is only magnetically inverter is proposed with some positive results. This solution
coupled to the stator main winding, is explored for improving the is, however, complex and there are some doubts about the
starting and operating power factor of a three-phase induction controller presented. Other solution presented in [7, 8] is
motor. The scheme improves the power factor of the motor applicable only to a wound rotor machine, as the rotor is
without compromising significantly on other performances.
Important advantages of the scheme include preventing required to be connected to an external circuit.
harmonics in the line current, and eliminating regeneration In this paper a single-phase stator auxiliary winding that is
possibility as well as preventing high inrush currents at starting