Resolver to digital converter

Details Resolver to digital converter Resolver to digital converter

1991-06-17

1992-11-10

Pellinen, A. D.

Coded data generation or conversion

Phase or time of phase change

Synchro or resolver signal

341115, H03M 148

Patent

active

051627981

ABSTRACT:
An apparatus, preferably in the form of a resolver to digital converter for converting the amplitude modulated, encoded signals into digital signals representative of the velocity and position is described. The apparatus is of the type that includes an electronic control transformer circuit for providing respective products of sine and cosine analog signals respectively times the cosine and sine of the digital position signals and for differencing the products so as to produce an analog AC error signal. The improvement comprises means for converting the analog AC error signal into a digital DC error signal and a digital accumulator for time integrating the DC error signal to generate the digital position signal. In a preferred embodiment the output of the accumulator is digitally modulated so as to provide the digital position signal as a bit-reduced feedback signal to the electronic control transformer.

REFERENCES:
patent: 3706923 (1972-12-01), Dunfield
patent: 4079374 (1978-03-01), Cox
patent: 5057759 (1991-10-01), Ueda et al.

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