Control device and methods of making and operating the same

Details Control device and methods of making and operating the same Control device and methods of making and operating the same

1993-02-25

1995-08-08

Hoff, Mark S.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

H01H 4704

Patent

active

054404436

ABSTRACT:
A control device and methods of making and operating the same are provided, the control device comprising a microcomputer unit, a relay unit having a coil and contacts that are operated to one condition thereof when a direct current flows through the coil, the relay unit having a certain voltage rating, a power supply unit for being interconnected to a high voltage alternating current power supply that has a certain frequency, and a circuit operatively interconnecting the units together, the power supply unit comprising a transformerless capacitor arrangement for creating a low voltage direct current source from the power source to power the microcomputer unit and the coil, the power supply unit comprising an arrangement for creating from the transformerless capacitor arrangement a first low voltage direct current for powering the microcomputer unit and a second low voltage direct current for powering the coil of the relay unit whereby the first low voltage direct current and the second low voltage direct current comprise the low voltage direct current source.

REFERENCES:
patent: 4631627 (1986-12-01), Morgan
patent: 4797779 (1989-01-01), Richards et al.
patent: 4878147 (1989-10-01), Oyama et al.
patent: 4884160 (1989-11-01), Pasquarella
patent: 5168418 (1992-12-01), Hurley et al.

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