Power delivery circuit with short circuit protection

Details Power delivery circuit with short circuit protection Power delivery circuit with short circuit protection

1996-04-23

1999-11-16

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307139, 307130, 361 93, 318434, H01H 4700

Patent

active

059863595

ABSTRACT:
The present invention advantageously provides a microprocessor controlled power delivery circuit with short circuit protection. The microprocessor controls the load current flow at the circuit's load connection terminal by connecting this terminal to the positive or negative side of a power supply or opening the circuit to prevent current flow. The short circuit protection uses a passive electrical component feedback circuit to communicate the voltage level at the circuit's load connection terminal back to the microprocessor. The microprocessor routinely monitors this voltage and compares this voltage against the expected voltage at this terminal. When the actual voltage does not match the expected voltage, the circuit will provide protection by interrupting current flow through the load connection terminal.

REFERENCES:
patent: 4787007 (1988-11-01), Matsumura et al.
patent: 4810943 (1989-03-01), Kawaguchi et al.
patent: 4849651 (1989-07-01), Estes, Jr.
patent: 4985666 (1991-01-01), Nakabayashi
patent: 5304935 (1994-04-01), Rathke et al.
patent: 5340202 (1994-08-01), Day
patent: 5530332 (1996-06-01), Rees
patent: 5563759 (1996-10-01), Naad
patent: 5627717 (1997-05-01), Pein et al.
patent: 5650705 (1997-07-01), Hart
patent: 5723915 (1998-03-01), Maher et al.
SGS Power Linear Actuators Data Book, 2.sup.nd Edition, 1984, pp. 54-55.

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