초록 ▼

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 re

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.

대표청구항 ▼

A mechanism for driving a first member and a second member, said mechanism comprising: a first magnetic coupler coupled to a first motor and the first member for rotating the first member in response to activation of the first motor; a second magnetic coupler coupled to a second motor and the second

A mechanism for driving a first member and a second member, said mechanism comprising: a first magnetic coupler coupled to a first motor and the first member for rotating the first member in response to activation of the first motor; a second magnetic coupler coupled to a second motor and the second member for rotating the second member in response to activation of the second motor; a shield positioned between the first magnetic coupler and the second magnetic coupler to reduce magnetic coupling between the first magnetic coupler and second magnetic coupler.