Patent ID: 9412516
Filing Date: 2016-08-09
CPC Classification: G01D,H01F,H02K

Claim Text:
1. A resolver configured to detect a rotational angle of a motor comprising: a rotator; a stator mounted around the rotator and comprising a core having protrusions disposed at a predetermined interval along a rotational direction of the rotator; a signal source coil wound around the protrusions of the core and configured to generate an alternate current (AC) magnetic field when an input voltage signal is applied thereto; and a plurality of output signal coils wound around protrusions of the protrusions of the core in an alternating manner along the rotational direction of the rotator, wherein the plurality of output signal coils comprise the same number of turns around the protrusions, wherein the same number of turns is obtained by the equation Nip=2 Nt/Z, where Nip denotes the same number of turns of the each of the plurality of output signal coils, Nt denotes a total number of turns of the output signal coil and Z denotes a number of protrusions of the core, wherein the plurality of output signal coils comprise: wherein the first output signal coil wound around odd-numbered protrusions at a first position along a radial direction of the plurality of the protrusions, and the second output signal coil wound around even-numbered protrusions at a second position different from the first position along the radial direction of the plurality of the protrusions.