Patent ID: 7157906
Filing Date: 2007-01-02
Classification: G01D,G01P

Abstract:
1. A double variable reluctance resolver comprising: a first VR resolver, wherein the first VR resolver includes a first plurality of stator magnetic poles and a first rotor, and the first plurality of stator magnetic poles is distributed over an angular range of the first VR resolver; a second VR resolver, wherein the second VR resolver includes a second plurality of stator magnetic poles and a second rotor, wherein a predetermined group of the poles of the second plurality of stator magnetic poles correspond to the first plurality of stator magnetic poles, and the predetermined group of poles is distributed over an angular range of the second VR resolver, and windings of the first VR resolver are coiled such that, over the angular range of the first plurality of stator magnetic poles, the output of secondary windings provided on the first plurality of stator magnetic poles is substantially the same as the output of the predetermined group of stator magnetic poles over the angular range of the predetermined group of stator magnetic poles, wherein the number of stator magnetic poles in the second plurality is an integer multiple, other than one, of the number of poles in the first plurality.