Machine element or mechanism – Elements – Flywheel – motion smoothing-type
Patent
1991-10-11
1993-01-19
Luong, Vinh T.
Machine element or mechanism
Elements
Flywheel, motion smoothing-type
74573R, 310153, G05G 100, H02K 2122
Patent
active
051798727
ABSTRACT:
A magneto rotor includes a bowl-like aluminum body with an open end defined by an annular rim having an inner peripheral surface. A plurality of arcuate pockets are machined into the peripheral rim surface, each of the pockets extending between first and second radiused ends, the radius of curvature of the pockets being approximately equal to the radius of curvature of the rim. A light weight, high field-strength magnet, formed as an arcuate plate of a neodymium-iron alloy, is adhesively fixed in each of the pockets. Each of the magnets substantially conforms to the pocket in which it is seated, and extends between first and second radiused ends. The engagement between the radiused pocket ends and the radiused magnet ends restrains the magnets from dropping radially inwardly from the pockets should the adhesive fail. The magnets are restrained from moving axially out of the pockets by a retaining ring that covers the open tops of the pockets. In a preferred embodiment, the magnet alloy is approximately 33 percent neodymium, 64 percent iron, 1 percent boron, and 2 percent dysprosium. The resulting rotor structure provides high magnetic field strength with relatively low structural mass, thereby enhancing engine performance.
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Luong Vinh T.
Pernice Robert J.
Pernice Sophia C.
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