Brushless rotating electric machine

Abstract

A brushless rotating electric machine has an armature with a polyphase winding on an armature core, a field core wound with a field winding, a first exciting means which provides flux variation to the field core and a second exciting means which supplies direct current to the field winding by utilizing the flux variation provided as an exciting source to the field core by the first exciting means. The machine may also provide a structure so that the first exciting means is an excitation winding wound on the armature core to supply direct current, and the second exciting means has an induction winding provided on the field core and a rectifier connected to the induction winding. Additionally, the electric machine can be constructed so that the induction winding serves also as the field winding and short-circuits the field winding through the rectifier.

Dependencies are inferred from the claim text.