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US 7,116,083 B2Granted
Method and system for providing current limiting controllers for high reactance permanent magnet generators
AssigneeHoneywell International Inc.
InventorsGabor Kalman, Colin E. Huggett
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Abstract
A system and method is provided for overload and fault current protection of a permanent magnet generator. The system comprises a permanent magnet machine, a DC link, an inverter, coupled between the permanent magnet machine and the DC link, and a controller adapted to provide a linear decrease in voltage for the DC link when the permanent magnet machine is in at least one of an overload and fault current condition.
Claims17
A system comprising:
- a permanent magnet machine;
- a DC link;
- an inverter, coupled between said permanent machine and said DC link;
- and
- a controller adapted to provide a linear decrease in voltage for said DC link when said permanent magnet machine is in at least one of an overload and fault current condition wherein the controller regulates a DC voltage by adjusting a load angle and magnitude of an AC terminal voltage of said inverter with respect to an electromagnetic force for the permanent magnet machine.
2 more elements
A method of providing overload and fault current protection to a permanent magnet machine generator, the method comprising:
- determining a load angle from a measured DC link voltage and a reference DC link voltage;
- providing a reference current signal from said load angle;
- detecting a measured current from an AC generator;
- providing a reference voltage signal from said reference current signal;
- and
- modulating an inverter with said reference voltage signal to provide a linear decrease in current of said DC link when said permanent magnet machine is in one of at least an overload and fault current condition.
3 more elements
Dependencies are inferred from the claim text.