Resolver analog to digital input module for use in a programmabl

Details Resolver analog to digital input module for use in a programmabl Resolver analog to digital input module for use in a programmabl

1989-01-31

1990-09-04

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Digital or numerical systems

318603, 318561, 318626, 318692, 341116, G05B 1931

Patent

active

049547631

ABSTRACT:
The resolver input module for use in programmable controller systems is one of several modules mounted in a rack to form a programmable controller. The module's function is to provide position data from an externally located resolver which is connected to a machine's shaft to the programmable controller's processor module. This is accomplished by moving the resolver analog-to-digital conversion circuitry from an external module location to the programmable controller input/output rack and coupling this circuitry to circuits which synchronize the programmable controller's input fetch signals. Additionally, a user operable entry mechanism for digitally offsetting the resolver position by a user-selectable amount while accommodating different scale factors is provided. Synchronization and alignment circuitry are provided for synchronizing and aligning data to compensate for different resolver gear ratios in coarse-fine geared resolver decoding circuitry. The resolver input module preferably includes a numerical display of the digitally offset resolver position data. The resolver input module also provides BCD coded output data which is easily connected to such devices as remote digital displays.

REFERENCES:
patent: 3885209 (1975-05-01), Lazarus
patent: 4014014 (1977-03-01), Jones et al.
patent: 4060799 (1977-11-01), Jones
patent: 4308525 (1981-12-01), Simon et al.
patent: 4469993 (1984-09-01), Swanson et al.
patent: 4744022 (1988-05-01), Kumar et al.

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