Resolver-to-digital converting apparatus, method and program

Details Resolver-to-digital converting apparatus, method and program Resolver-to-digital converting apparatus, method and program

2007-08-28

2007-08-28

Tsai, Carol S.W. (Department: 2857)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Position measurement

C702S106000, C702S151000, C033S0010DD, C341S112000

Reexamination Certificate

active

11077221

ABSTRACT:
A resolver-to-digital converting apparatus calculates a resolver rotational angle from two-phase sampling values that are the result of sampling two-phase output signals, which are obtained from a single-phase-excited, two-phase output resolver, at peak timings of a waveform. The apparatus includes a determination unit for determining whether each of the two-phase sampling values has deviated from a prescribed path of rotation by more than a predetermined amount when the two-phase sampling values are represented by orthogonal coordinates; a correction processing unit, responsive to a determination that the predetermined amount has been exceeded, for applying a correction to the two-phase sampling values using an equation of a tangent to the path of rotation at a point on the path of rotation at which the previous resolver rotational angle was obtained; and an angle calculation unit for obtaining a resolver rotational angle at the corrected two-phase sampling values obtained by correction processing.

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patent: 3408238 (2003-03-01), None

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