Permanent magnet generator rotor for integrated drive generator
AssigneeHamilton Sundstrand Corporation
InventorsDerek R. Hochstetler, Ted A. Martin, Duane C. Johnson, Glenn C. Lemmers, JR., Diego Rocha
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Abstract
A rotor for a permanent magnet generator includes a rotor body extending between a first end and a second end, having a cylindrical bore and a plurality of flats on an outer peripheral surface. Permanent magnets are positioned at the flats. An outer ring surrounds the permanent magnets and defines an outer diameter. A ratio of the outer diameter to an axial length between the first and second ends is between 3.2 and 3.4. An integrated drive generator and a method are also disclosed.
Claims20
A rotor for a permanent magnet generator comprising:
- a rotor body extending between a first end and a second end, having a cylindrical bore and a plurality of flats on an outer peripheral surface;
- permanent magnets positioned at said flats;
- and
- an outer ring surrounding said permanent magnets and defining an outer diameter, and a ratio of said outer diameter to an axial length between said first and second ends being between 3.2 and 3.4.
An integrated drive generator comprising:
- an input shaft configured to drive a carrier, said carrier configured to drive a gear differential to provide an input into a main generator, said main generator being configured to produce power for use on an associated system, said gear differential being further configured to drive a permanent magnet rotor positioned adjacent a stator, said permanent magnet generator configured to provide power to uses;
- said permanent magnet rotor having a body extending between a first end and a second end having a cylindrical bore and a plurality of flats on an outer peripheral surface;
- and
- permanent magnets positioned at said flats, and an outer ring surrounding said permanent magnets, and defining an outer diameter, and a ratio of said outer diameter to an axial length between said first and second ends being between 3.2 and 3.4.
A method of replacing a permanent magnet rotor in an integrated drive generator comprising the steps of:
- a) removing an existing permanent magnet rotor from an integrated drive generator, wherein the integrated drive generator includes an input shaft configured to drive a carrier, said carrier configured to drive a gear differential, and an output of said gear differential configured to provide an input for a main generator, said main generator configured to produce power, and said gear differential further being configured to drive said existing permanent magnet rotor;
- and
- b) replacing said existing permanent magnet rotor with a replacement permanent magnet rotor, the replacement permanent magnet rotor including a rotor body extending between a first end and a second end, and having a cylindrical bore and a plurality of flats on an outer peripheral surface, permanent magnets positioned at said flats, and an outer ring surrounding said permanent magnets, and defining an outer diameter, and a ratio of said outer diameter to a length between said first and second ends being between 3.2 and 3.4.
Dependencies are inferred from the claim text.