Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1992-12-04
1998-03-03
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307 31, 361 87, 361 93, 361 94, 361101, 323315, 323316, 323317, H04H 308
Patent
active
057239150
ABSTRACT:
A solid state power controller for switching power on and off to an electrical load which also serves as a circuit protection device protecting the load and/or the wire connected between the load output terminal of the controller and ground from thermal damage due to current overload is shown. When a current overload exists the controller interrupts current to the load in a time inversely proportional to the square of the magnitude of the overload as shown in a trip time vs load current curve. The controller also limits the load current to a selected maximum level by controlling the drain-source resistance of power MOSFETs used for switching the power. A secondary interrupt is provided in the event that the junction temperature of the MOSFETs has risen a selected maximum level. A thermal memory feature is included for both interrupt signals. The controller is controlled by a single on/off input line and provides both a status and trip output line to indicate its state. The status can be configured to monitor load voltage or load current flow as desired. The controller also can be configured to default to either an on or off state in the event the input line is disconnected.
REFERENCES:
patent: 3584261 (1971-06-01), Anderson
patent: 3594668 (1971-07-01), Clark et al.
patent: 3651436 (1972-03-01), Cooper et al.
patent: 3944890 (1976-03-01), Little
patent: 4081696 (1978-03-01), Oda et al.
patent: 4268759 (1981-05-01), Gilbert
patent: 4446500 (1984-05-01), Grenier et al.
patent: 4866557 (1989-09-01), Fitts et al.
patent: 4866559 (1989-09-01), Cobb et al.
patent: 4870531 (1989-09-01), Danek
patent: 4910631 (1990-03-01), Murphy
patent: 4956741 (1990-09-01), Murphy et al.
patent: 4962439 (1990-10-01), Nutz
patent: 4967304 (1990-10-01), Dougherty
patent: 5283708 (1994-02-01), Waltz
Kawate Keith W.
LeComte Norman E.
Maher Thomas R.
Baumann Russell E.
Donaldson Richard L.
Ganjian Peter
Grossman Rene E.
Shoop Jr. William M.
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