Patent ID: 7005771
Filing Date: 2006-02-28
Classification: G01D,H02K

Abstract:
1. A variable reluctance resolver comprising multiple stator magnetic poles having resolver exciter coils and resolver output coils, which respectively output the X component and Y component of a rotary angle in accordance with the rotation of a rotor, wherein: the resolver output coils are wound such that the output voltage polarities of the resolver output coils wound around at least 3 adjacent stator magnetic poles are the same; the resolver output coils are divided into at least 2 or a greater even number of groups; the resolver output coils within each group of the at least 2 or a greater even number of groups are connected in series such that the output voltage polarities of adjacent groups of the at least 2 or a greater even number of groups differ with respect to one another; and each group of the at least 2 or a greater even number of groups has outermost output coils and output coils between the outermost output coils wherein the number of turns of each of the outermost output coils is less than the number of turns of the output coils between the outermost output coils to reduce the effect of external magnetic flux.