Multi-purpose compressor controller

Details Multi-purpose compressor controller Multi-purpose compressor controller

1982-11-12

1985-04-09

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Compressor protective circuits

361 24, 361 25, 361106, 361 92, H02H 700, H02H 504

Patent

active

045105472

ABSTRACT:
The compressor motor controller of the present invention includes a hot motor detector adapted to be coupled to a plurality of temperature sensors for detecting an overtemperature condition of the compressor motor. The hot motor detector incorporates logic switching means for generating a motor control signal. A self diagnostic sensor is coupled to the hot motor detector for detecting an electrically shorted condition of the temperature sensors while a low voltage detector is coupled to the hot motor detector for sensing a low line voltage condition. Means are provided for protecting the compressor motor against the undesirable effects of short cycle operation while a lubricating oil pressure detector receives signals from a pressure transducer which are representative of oil pressure. A self-contained power supply provides a source of electrical power to the controller while an isolated output means is coupled to the separately mounted motor starting contactor for controllably energizing the compressor motor.

REFERENCES:
patent: 3585451 (1971-06-01), Dax
patent: 4038061 (1977-07-01), Anderson et al.
patent: 4281358 (1981-07-01), Plouffe et al.

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