Patent ID: 9528857
Filing Date: 2016-12-27
CPC Classification: G01D

Claim Text:
1. A resolver to digital converter system, comprising: a resolver comprising a reference winding attached to a rotor, and first and second output windings attached to a stator and coupled to the reference winding, wherein the reference winding is configured to be driven with a reference AC signal having a known frequency and induce first and second output signals from the first and second output windings, respectively, in response to the reference AC signal; and a controller circuit configured to compare the first and second output signals to first and second linear signals, respectively, ascertain first and second time intervals between first and second determined start time points and first and second stop time points, respectively, where magnitudes of the first and second output signals are substantially equal to magnitudes of the first and second linear signals, respectively; wherein the controller circuit is further configured to calculate a rotating angle of the resolver based on the first and second time intervals.