Servo motor system requiring a reduced number of signal transmis

Details Servo motor system requiring a reduced number of signal transmis Servo motor system requiring a reduced number of signal transmis

1989-11-24

1990-12-11

Roskoski, Bernard

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

318803, 318721, 318572, G05B 1300

Patent

active

049773593

ABSTRACT:
In a servo motor system, consisting of a servo motor unit, a servo driver unit, power transmission lines for supplying electric power from the servo driver unit to the servo motor unit, and signal transmission lines for supplying electric signals from the servo motor unit to the servo driver unit, to the end of reducing the number of the signal transmission lines without requiring any particularly high-speed or high-quality signal transmission lines, the servo motor unit comprises a parallel-serial signal conversion circuit for converting outputs from a pole sensor, a rotary encoder, and an abnormal condition sensor into a single serial signal which is transmitted to the servo driver unit via one of the signal transmission lines. The servo driver unit comprise a serial-parallel signal conversion circuit for separating from the serial signal the aforementioned outputs from the various sensors. By suitable logical combination of the parallel signals, the number of bits required for the transmission of the serial signal can be reduced.

REFERENCES:
patent: 4618810 (1986-10-01), Hagerman
patent: 4713593 (1987-12-01), Rodi et al.

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