Patent ID: 8963542
Filing Date: 2015-02-24
Classification: G01D

Abstract:
1. A method for minimizing magnetic interference in a multi-pole variable reluctance resolver, the method comprising: driving a differential sinusoidal signal source through a balanced resolver wiring, wherein the signal source has a 180 degree differential and a frequency of less than 50,000 hertz, and wherein magnetic interference between poles of a same polarity in the resolver is minimized by the balanced resolver wiring; adding at least one capacitive passive element serially to each winding of the resolver, wherein magnetic interference on each winding of the resolver is canceled, wherein magnetic interference between orthogonal poles in the resolver is minimized, wherein resolver rotation current maintains a constant phase, and wherein resolver rotation frequency is less than a few hundred hertz; and outputting a low distortion sine and cosine signal from the resolver.