Coded data generation or conversion – Phase or time of phase change – Synchro or resolver signal
Patent
1989-04-20
1991-01-29
Shoop, Jr., William M.
Coded data generation or conversion
Phase or time of phase change
Synchro or resolver signal
318661, H03M 148
Patent
active
049890018
ABSTRACT:
Disclosed is a microcontroller based Resolver-to-Digital converter in which synchronous sample-and-hold type demodulation is used with an optimum time of the sample-and-hold established by control of the phase and the magnitude of the reference voltage supplied to the resolver as a function of the resolver's electrical characteristics, thus minimizing the quadrature and the even harmonics effects which are a byproduct of the resolver. The demodulated resolver outputs are filtered and are converted to digital form with the use of an A/D converter integral or external to the microcontroller. The magnitude of the reference voltage is set to an optimum value in order to utilize the full range of the A/D converter. Using digital signal processing techniques and known trigonometric identities the shaft angle of the resolver is extracted from the A/D outputs and supplied to the output latches in continuous or bus controlled fashion. This method is further expended to cover the use of the R/D converter with multiple resolvers.
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Brochure of Advanced Micro Controls, Inc. dated 5/88 and entitled "Third Generation Programmable Limit Switch-The Obvious Choice".
Data Sheet of Advanced Micro Controls, Inc. entitled "iPCE-1 Intelligent Programmable Controller Encoder", undated.
Advanced Micro Controls, Inc.
Hoff Marc S.
Shoop Jr. William M.
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