Universal solid state power controller

Details Universal solid state power controller Universal solid state power controller

1986-08-04

1988-04-26

Ruggiero, Joseph

Boots, shoes, and leggings

307 26, 361100, 364184, 364483, G01R 1900

Patent

active

047408839

ABSTRACT:
A universal solid state power controller for controlling the application of a source voltage to a load comprising a semiconductor switch having a predetermined non-bounce switching characteristic. The switch is responsive to an operating signal for connecting the load to the source voltage. A control means has a microcomputer following a predetermined program. The control means is responsive to a command electrical signal and provides the semiconductor switching means operating signal. The microcomputer program has an ac subprogram for SSPC operation with a source voltage of sinusoidal character and a dc subprogram for SSPC operation with a source voltage of direct current character. A voltage selection circuit provides a logic signal of a first polarity to the microcomputer to direct the microcomputer to use the ac subprogram for SSPC operation with an ac source. The logic signal has a second polarity to direct the microcomputer to use the SSPC dc subprogram for operation with a dc source. A current rating selection circuit provides a logic signal to the microcomputer to direct the microcomputer to select a predetermined current rating for the power controller. The invention electrical switch provides a bounce-free closure of the conduction path from the alternating source voltage to the load in response to the command electrical signal. The closure corresponds with a first predetermined sequence of alternating source voltage crossing zero voltage. The invention switch interrupts the conductive path to the load without contact bounce, associated arcing in response to interruption of the command electrical signal.

REFERENCES:
patent: 4445183 (1984-04-01), McCollum et al.
patent: 4538231 (1985-08-01), Abe et al.
patent: 4541058 (1985-09-01), Andow et al.
patent: 4665355 (1987-05-01), McCollum et al.
patent: 4672501 (1987-06-01), Bilac et al.

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