Magnetic disk motor having a cup-shaped rotor

Details Magnetic disk motor having a cup-shaped rotor Magnetic disk motor having a cup-shaped rotor

1987-10-06

1988-07-26

Salce, Patrick R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 384517, 384563, H02K 516, H02K 708, B23B 1902, G11B 2504

Patent

active

047602988

ABSTRACT:
A motor for rotating a magnetic disk comprises an armature concentrically secured to a center shaft affixed to a mounting frame. A rotor frame having a cylindrical side wall of uniform outside diameter is rotatably supported in a cantilever fashion on a free end of the center shaft by a pair of bearings encircling the outer peripheral surface of the armature and a magnetic disk support that projects from the side wall. A permanent magnet secured inside the side wall is disposed to interact with magnetic fields produced by the armature. The cantilever support makes it easier to bring armature leads through a hole in the mounting frame as a part of the manufacturing process.

REFERENCES:
patent: 2433518 (1947-12-01), Ljunggren
patent: 4471250 (1984-09-01), Snider
patent: 4480881 (1984-11-01), Fujimori
patent: 4580471 (1986-04-01), Oyama et al.
patent: 4604665 (1986-08-01), Muller et al.
patent: 4672250 (1987-06-01), Seitz

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