Electrical machine and method of operating electrical machine
AssigneeGE Aviation Systems LLC
InventorsSuresh Babu Kamparaju, Balamurugan Sridharan, Shubham Sharma, Xiaochuan Jia
Life of this patent
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Abstract
An electrical machine comprising a rotatable shaft; an induction generator mechanically coupled to the rotatable shaft and defining a power output connectable with an electrical load, wherein the power output defines a desired constant voltage output; a converter electrically connected with the power output; and a controller connected to the converter, the controller configured to at least one of provide supplemental power at the power output or absorb excess power at the power output.
Claims20
An electrical machine, comprising:
- a rotatable shaft;
- an induction generator mechanically coupled to the rotatable shaft and defining a power output connectable with an electrical load, wherein the power output defines a desired constant voltage output;
- a converter electrically connected with the power output;
- a permanent magnet generator (PMG) mechanically coupled to the rotatable shaft and electrically connected to the induction generator and the convertor;
- and
- a controller connected to the converter, the controller configured to cause the convertor to use the PMG as a power source to provide an initial excitation current to the induction generator during an initial phase of operating the induction generator.
An electrical machine, comprising:
- a rotatable shaft;
- an induction generator mechanically coupled to the rotatable shaft and defining a power output connectable with an electrical load, wherein the power output defines a desired constant voltage output;
- a converter electrically connected with the power output;
- a power storage device electrically connected to the converter, the power storage device including a battery, a capacitor, or a battery and a capacitor;
- a permanent magnet generator (PMG) mechanically coupled to the rotatable shaft and electrically connected to the induction generator and the power storage device;
- and
- a controller connected to the converter, the controller configured to cause the PMG, at least indirectly via the power storage device, to provide an initial excitation current to the induction generator during an initial phase of operating the induction generator.
An electrical machine, comprising:
- a rotatable shaft;
- an induction generator mechanically coupled to the rotatable shaft;
- a converter electrically connected with the power output;
- a power storage device electrically connected to the converter;
- a permanent magnet generator (PMG) mechanically coupled to the rotatable shaft and electrically connected to the induction generator, the convertor, and the battery;
- and
- a controller configured to cause the PMG to provide a PMG output to at least one of the convertor or the power storage device during an initial phase of operating the induction generator.
Dependencies are inferred from the claim text.