Metal working – Method of mechanical manufacture – Electrical device making
Patent
1989-05-25
1990-05-01
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
H02K 1502
Patent
active
049206346
ABSTRACT:
A rotor structure for a dynamoelectric machine including a magnetic core having a cylindrical outer surface. Equicircumferentially spaced permanent magnets are secured to the face of the core with gaps therebetween on diametrically opposite locations of the core. The outer surfaces of the magnets define a cylindrical surface. A retention and encircles the magnets. The band has a width substantially less than the width of the magnets including opposite ends overlapped and aligned with a securement gap. The core has a first hole aligned with the securement gap. A securement unit has a seat engaging the overlapping ends and a stem in the core hole to lock the band in holding engagement. The head is located within the cylindrical surface. A second hole is diametrically spaced from the first hole and aligned with a second gap. The second hole is formed to balance the rotor and may also receive a second securement unit to establish the band tension. The securement unit is shown as a T-shaped member having a pin which is wedged or threaded into the hole. The securement unit is also shown as an axially elongated wedge and the core hole is an axially elongated slot, with the opposite ends of the band wedge within the opposite sides of the slot.
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A. O. Smith Corporation
Echols P. W.
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