Method and apparatus for electromagnetically resolving the angle

Details Method and apparatus for electromagnetically resolving the angle Method and apparatus for electromagnetically resolving the angle

1992-03-02

1993-08-31

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

364559, 32420717, G01B 730

Patent

active

052412687

ABSTRACT:
A method and apparatus for determining the angle of a shaft (16) of an electromagnetic resolver which has resolver windings (10, 12) is disclosed. The sine and cosine resolver winding signals (30, 32) are sampled at a frequency significantly greater than the resolver drive signal. A fast fourier transform (38, 40) is then applied to the winding signals. The polarity of the drive signal (42) is applied to the FFT output (44, 46) and the results are divided one into the other (52) to obtain the arctangent of the shaft angle (56). Using a multiplexer (22) the apparatus can be coupled to a large number of different electromagnetic resolvers.

REFERENCES:
patent: 4829250 (1989-05-01), Rotier
patent: 4845429 (1989-07-01), Burreson
patent: 4847556 (1989-07-01), Langley
patent: 4967153 (1990-10-01), Langley
patent: 5130866 (1992-07-01), Klaassen et al.

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