Current limiting device

Details Current limiting device Current limiting device

1990-09-04

1993-02-16

Stephan, Steven L.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

323908, 361 91, H02M 704

Patent

active

051876531

ABSTRACT:
A current limiting circuit for limiting current surges caused by device turn-on and by input line voltage surges. The circuit has a current sensor for sensing current surges and causing the current to be routed through a current limiting device, such as a resistor. The current sensing circuit senses both over current and normal current conditions and resets the current limiting switch as appropriate. The use of a current sensor as opposed to a sensor for turn-on conditions or voltage levels provides actual control of the current thereby protecting the electrical device during the first application of power and from AC line voltage surges.

REFERENCES:
patent: 3913002 (1975-10-01), Steigerwald
patent: 3935511 (1976-01-01), Boulanger et al.
patent: 3935527 (1976-01-01), Michelet
patent: 4278930 (1981-07-01), Rogers
patent: 4396882 (1983-08-01), Kellenbenz
patent: 4519024 (1985-05-01), Federico et al.
patent: 4631470 (1986-12-01), Bingley
IBM TDB, 24-3, Aug. 1981, pp. 1437-1438, C. Driscoll/M. Waechter, "Active Transient Supressor for Line-Operated Switching Regulator".
IBM TDB, 25-2, Jul. 1982, p. 470, J. Kinnard, "Power Supply Inrush Current Limiter/Clamp Circuit".
IBM TDB, 28-8, Jan. 1986, pp. 3283-3284, "Surge Current Limiting for Power Supply".
Unitrude Applications Handbook, 1987-1988, pp. 379-382.

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