US 5,204,572 A · Radial magnetic coupling

Abstract

A permanent magnet coupling including a rotatable inner member 32, and outer member 12 rotatable about the same axis 14 as the inner member 32, a plurality of magnets 36 each having a nominally trapezoidal cross section, and a plurality of interpole members 34 each having a nominally trapezoidal cross section. The interpole members 34 are disposed circumferentially between adjacent magnets 36. The major bases 38 of the magnets 36 are located on the sleeve-like cylindrically-shaped iron core 16 of the inner member 32. In operation, the side surfaces 48,50 of the permanent magnets 36 wedge between the side surfaces 42 of the interpole members 34 by centrifugal force. This, in turn, prevents the magnets 36 from moving under static or dynamic conditions. Thus, the interpole members 34 restrain the magnets 36 in a similar fashion as the containment ring 30 generally without requiring a containment ring 30.

Claims11

Dependent claims

A permanent magnet coupling having:

an outer member with a plurality of permanent magnets mounted on its inner surface;
an inner member having a radius and lying within said outer member;
a plurality of interpole members circumferentially disposed on the inner member in proximity to said outer member and defining gaps having an inner boundary and an outer boundary wherein the length of the inner boundary is greater than the outer boundary;
and
a plurality of permanent magnets each having a north and south pole and wedged into respective ones of the gaps defined by the interpole members.

2 more elements

Dependencies are inferred from the claim text.

Radial magnetic coupling

Life of this patent

Radial magnetic coupling

Life of this patent

Abstract

Claims11