Patent ID: 9136737
Filing Date: 2015-09-15
Classification: H02K

Abstract:
1. A resolver, comprising a rotor formed from a magnetic body fixed on a rotating shaft and having concave and convex sections formed on an outer periphery, and a stator, having a stator core with a plurality of magnetic pole teeth arranged annularly around the rotor, and a plurality of coils formed by respectively winding electrical wire around the plurality of magnetic pole teeth, the resolver detecting a rotational position of the rotating shaft by detecting variations in reluctance between the rotor and the stator, comprising: a coil group for a single phase comprising a plurality of coil sets, each coil set formed from two coils that are wound around two adjacent magnetic pole teeth, electrically connected in series, each coil set includes the coils of the two adjacent magnetic pole teeth wound in opposite directions to each other when observed from the inside of the stator, and two connection terminals electrically connected to each end of the coil group for a single phase arranged adjacently, wherein an electrical wire connecting to an end winding of each coil is turned back along the circumference of the stator so as to run in a direction along the circumference of the stator opposite to an electrical wire connecting to a start winding of that coil, and wherein the electrical wire connecting to an end winding of that coil is connected to either a start winding of a next coil or a connection terminal.