Dual frequency electrical generators
AssigneeHamilton Sundstrand Corporation
InventorsMark F. Franzen, Mohammad Shahamat
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Abstract
A power conversion apparatus includes a first electrical machine and a second electrical machine. The first electrical machine includes a first rotor portion and a first stator portion electromagnetically coupled to the first rotor portion. The second electrical machine includes a second rotor portion and a second stator portion electromagnetically coupled to the second rotor portion. The first rotor portion is connected to the second rotor portion at shared axial position for common rotation therewith about a rotational axis of the power conversion apparatus.
Claims15
A power conversion apparatus, comprising:
- a first electrical machine, including:
- a first rotor portion;
- and
- a first stator portion electromagnetically coupled to the first rotor portion;
- and
- a second electrical machine, including:
- a second rotor portion;
- and
- a second stator portion electromagnetically coupled to the second rotor portion, wherein the first rotor portion is coupled to the second rotor portion at a shared axial position for common rotation therewith about an axis of the power conversion apparatus.
A dual-frequency generator, comprising:
- a first electrical machine disposed about a rotational axis, including:
- a first plurality of permanent magnet elements rotatable about the rotational axis;
- at least one first winding fixed in relation to the first plurality of permanent magnet elements and electromagnetically coupled to the first plurality of permanent magnet elements;
- and
- a first AC lead electrically connected to the at least one first winding;
- a second electrical machine disposed radially outward of the first electrical machine in relation to the rotational axis, including:
- a second plurality of permanent magnet elements connected to the first plurality of permanent magnet elements;
- at least one second winding fixed in relation to the second plurality of permanent magnet elements and electromagnetically coupled to the second plurality of permanent magnet elements;
- and
- a second AC lead connected to the at least one second winding,
- wherein the second plurality of permanent magnet elements is greater than the first plurality of permanent magnet elements such that concerted rotation of the first and second plurality of permanent magnet elements about the rotational axis coincidentally induces an AC voltage differential across the at least one second winding having a frequency that is greater than a frequency of an AC voltage differential induced across the at least one first AC winding.
Dependencies are inferred from the claim text.