Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1995-10-17
1996-07-23
Laballe, Clayton E.
Electrical generator or motor structure
Dynamoelectric
Rotary
310103, 901 23, H02K 4910, H02K 710, B25J 1100
Patent
active
055392660
ABSTRACT:
A compact assembly of two magnetic couplers for coupling two coaxial angular shaft movements through a vacuum barrier. Each coupler includes two concentric rings of radially oriented magnets, arranged to provide magnetic coupling in a radial direction between corresponding magnets in the rings. A relatively large number of magnets in each ring ensures stiff coupling between rings, but unwanted circumferential coupling between adjacent magnets in each ring is minimized by the presence of a flux ring associated with each ring of magnets. The flux rings provide a return path for radial magnetic flux lines between the rings. Cross-coupling between the couplers is minimized by the presence of a magnetic shield on each ring of magnets. The shields permit the couplers to be located in close proximity on their common axis of rotation. For corrosion resistance, each ring of magnets on the vacuum side of the barrier is housed in a stainless steel enclosure.
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Applied Materials Inc.
LaBalle Clayton E.
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