Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1990-10-24
1992-03-03
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310112, 318 35, 318115, H02K 2340, H02K 706
Patent
active
050935968
ABSTRACT:
A combined linear-rotary direct drive step motor, having a rotary section and a linear section in a single housing, comprising a cylindrically shaped variable reluctance linear step motor; a modified hybrid permanent-magnet rotary step motor; and a common shaft shared by said linear step motor and said rotary step motor. The teeth of the rotary motor are circumferentially spaced around the stator pole faces and rotor; while in the linear portion of the motor, the teeth are longitudinally spaced along the face of the stator poles and rotor. Except for the teeth, the shape of the stator poles in the rotary and linear sections are identical. The laminated stators and rotors reduce eddy current losses at high stepping speeds. The stator coils of both motor sections are separate and can be energized independently allowing any combination of rotary or linear motion. According to alternate embodiments of the invention, the rotor is fabricated from stacked laminations, in a waffle board like configuration.
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Feig Phillip
IBM Corporation
Kaliko Joseph J.
Stephan Steven L.
To E. H.
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