Supervisory and control system for rotary machinery, particularl

Details Supervisory and control system for rotary machinery, particularl Supervisory and control system for rotary machinery, particularl

1975-12-31

1977-08-09

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361106, 310 68C, H02H 708

Patent

active

040415414

ABSTRACT:
A rotary transformer having a stator and a rotor is energized by a power supply at commercial power frequency; sensors are located on the rotary part of the machine and provide sensing output signals, at discrete threshold levels, to a threshold circuit which, in accordance with the sensed signals, provides loading on the transformer secondary in discrete steps; the loading on the secondary is reflected into the primary and sensed to provide, selectively, alarm or stop-motion signals if operating parameters, typically temperature, as sensed by the sensors, reach levels necessitating an alarm or even a stop-motion signal.

REFERENCES:
patent: 1752609 (1930-04-01), Poynder
patent: 2575922 (1951-11-01), Langenwalter
patent: 3317874 (1967-05-01), Honsinger
patent: 3329869 (1967-07-01), Obenhause
patent: 3358208 (1967-12-01), Takami
patent: 3404313 (1968-10-01), Happel et al.

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