Shunt regulator at excitation output of generator control unit for overvoltage protection
AssigneeHamilton Sundstrand Corporation
InventorsBruce D. Beneditz, John N. Buzzard
Life of this patent
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Abstract
An electrical system includes a generator; a generator control unit connected to the generator; and a shunt regulator connected to an excitation output of the generator control unit, wherein the shunt regulator is configured to overload the excitation output of the generator control unit in the event of an overvoltage condition in the electrical system, such that an output voltage of the generator does not exceed a predetermined ceiling voltage during the overvoltage condition.
Claims19
An electrical system, comprising:
- a generator;
- a generator control unit connected to the generator;
- a shunt regulator connected to an excitation output of the generator control unit, wherein the shunt regulator is configured to overload the excitation output of the generator control unit based on an overvoltage condition at an output of the generator, such that an output voltage at the output of the generator does not exceed a predetermined ceiling voltage during the overvoltage condition;
- and
- an overvoltage protection module, the overvoltage protection module configured to, based on the overload condition, de-excite the generator and disconnect the generator after the overloading of the excitation output of the generator control unit by the shunt regulator.
A method for limiting an overvoltage condition in an electrical system by a shunt regulator connected to an excitation output of a generator control unit of the electrical system, the method comprising:
- activating the shunt regulator based on the overvoltage condition at the output of a generator that is controlled by the generator control unit;
- and
- overloading the excitation output of the generator control unit by the shunt regulator such that an output voltage of the generator connected to the generator control unit does not exceed a predetermined ceiling voltage during the overvoltage condition;
- and
- after overloading the excitation output of the generator control unit by the shunt regulator, de-exciting the generator and disconnecting the generator by an overvoltage protection module.
Dependencies are inferred from the claim text.