抄録
The circulating current in parallel-connected armature windings of synchronous machines causes losses in parallel circuits due to voltage unbalance. This paper describes a study on the effect of mutual inductances on the circulating current using the finite element electromagnetic analysis on a large synchronous machine with parallel-connected armature windings with a missing turn. The analysis results indicate that the mutual inductances between the parallel circuits affect the circulating current. The magnetic flux distribution due to the circulating current in each circuit can be evaluated individually using the magnetic permeability distribution of the circulating current in each circuit.
