公开(公告)号：US20180052013A1

公开(公告)日：2018-02-22

申请号：US15276348

申请日：2016-09-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Shanmuganand Chellamuthu ,  Viktor Tasevski ,  Ted F. Lekan ,  Fei Xu

IPC: G01D5/243

CPC classification number: G01D5/243 ,  G01D5/2073

Abstract: Methods, apparatus, systems and articles of manufacture to increase resolver-to-digital converter accuracy are disclosed. Example methods and apparatus compare a first induced signal and a first threshold signal to determine a first zero-cross signal, compare a second induced signal with the first threshold signal to determine a second zero-cross signal, compare an inducing signal with the first threshold signal to determine a third zero-cross signal, compare the first induced signal and a second threshold signal to determine a first zero-cross confirmation signal, the first zero-cross confirmation signal to indicate when to use the first zero-cross signal to determine a phase difference between the inducing signal and at least one of the first induced signal or the second induced signal, and compare the second induced sinusoidal signal and the second threshold signal to determine a second zero-cross confirmation signal, the second zero-cross confirmation signal to indicate when to use the second zero-cross signal to determine the phase difference.

公开(公告)号：US10408643B2

公开(公告)日：2019-09-10

申请号：US15276348

申请日：2016-09-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Shanmuganand Chellamuthu ,  Viktor Tasevski ,  Ted F. Lekan ,  Fei Xu

IPC: G01D5/243 ,  G01D5/20

Abstract: Methods, apparatus, systems and articles of manufacture to increase resolver-to-digital converter accuracy are disclosed. Example methods and apparatus compare a first induced signal and a first threshold signal to determine a first zero-cross signal, compare a second induced signal with the first threshold signal to determine a second zero-cross signal, compare an inducing signal with the first threshold signal to determine a third zero-cross signal, compare the first induced signal and a second threshold signal to determine a first zero-cross confirmation signal, the first zero-cross confirmation signal to indicate when to use the first zero-cross signal to determine a phase difference between the inducing signal and at least one of the first induced signal or the second induced signal, and compare the second induced sinusoidal signal and the second threshold signal to determine a second zero-cross confirmation signal, the second zero-cross confirmation signal to indicate when to use the second zero-cross signal to determine the phase difference.