Patent ID: 8143758

Claim:
A winding bobbin, comprising: a winding portion around which a conductor is wound to form a rotor coil; and a first flange portion and a second flange portion respectively provided on both sides of the winding portion, wherein: a first locking portion and a second locking portion, each being for locking the conductor, are respectively provided to the first flange portion and the second flange portion; the first locking portion provided to the first flange portion is in a pair, and a winding start portion of the conductor is locked to one of the first locking portions, whereas a winding end portion of the conductor is locked to another one of the first locking portions; the winding end portion of the conductor wound around the winding portion in an odd number of layers is locked to the second locking portion provided to the second flange portion; and a winding start-side lead wire connected to the winding start portion of the conductor and a winding end-side lead wire connected to the winding end portion of the conductor are led out from the first flange portion.