Abstract
Abstract:
Synchronous reluctance machine with simple salient rotor is known to have poor power factor because
of its poor reactance ratio. This study presents the use of an auxiliary winding attached to a balanced capacitor to
improve the effective reactance ratio as well as the performance characteristics of synchronous reluctance
machine. A unique feature of this configuration is that although the machine runs at synchronous speed, the
effective reactance ratio of the machine can be improved by appropriate sizing of the capacitor attached to
the auxiliary winding, with the constraint of the ampere turn rating of the auxiliary winding. The operational
characteristics of a simple salient rotor synchronous reluctance machine equipped with this configuration
were investigated and shown to have a desirable performance. How the effective reactance ratio, power
factor and airgap flux distribution depend on the size of capacitor attached to the auxiliary winding is
determined using a simplified mathematical model of the system. Analytical results and experimental
measurements are in good agreement, and demonstrate the effectiveness and benefits of the configuration