Programmable limit switch system using a resolver-to-digital ang

Details Programmable limit switch system using a resolver-to-digital ang Programmable limit switch system using a resolver-to-digital ang

1982-11-09

1985-04-16

Sloyan, T. J.

Communications: electrical

Audible indication

Percussion-type sound producer

318660, 364603, 364200, 364300, 364900, H03K 1302

Patent

active

045118841

ABSTRACT:
Disclosed is a microcomputer controlled system in which the resolver reference voltage is generated through microcomputer interrupts and the analog-to-digital conversion of the resolver outputs ratio is also timed by the microcomputer to match peaks of the resolver reference voltage. To improve accuracy and resolution, the resolver outputs are synchronously fullwave rectified to the polarity of the amplitude modulation voltage. The microcomputer uses the digital resolver shaft angle to control programmable limit switches.

REFERENCES:
patent: 3505669 (1970-04-01), Welch
patent: 4375636 (1983-03-01), Stack et al.
patent: 4390865 (1983-06-01), Lauro
Klein, Angle to Digital Conversion System, Instruments & Control Systems, vol. 40, No. 2, 2/1967, pp. 126-130.
Schmid, H., Synchro-To-Digital Converters, Electronic Design, 6, Mar. 15, 1970, pp. 178-185, 7, Apr. 1, 1970, pp. 50-58, 8, Apr. 12, 1970, pp. 76-79, 9, Apr. 26, 1970, pp. 72-77 and 10, May 10, 1970, pp. 98-103.
Manufacturer's Brochures: Mark VII Micro-Computer Programmable Limit Switches, 1982, C & A Products, Inc.
Microprocessor-Based Limit Programmer, Sequential Information Systems, Inc.
Microcomputer PLS, Sep. 1980, Gemco Electric.

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