Permanent magnet rotor and manufacturing method thereof

Details Permanent magnet rotor and manufacturing method thereof Permanent magnet rotor and manufacturing method thereof

1996-04-12

1998-04-28

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 88, 310 89, 310 91, H02K 504, H02K 515, H02K 2112

Patent

active

057448876

ABSTRACT:
A permanent magnet rotor includes a rotor shaft, a yoke mounted on the rotor shaft to form a magnetic path, a plurality of permanent magnets secured to the outer surface of the yoke, and a non-magnetic metallic cylindrical cover mounted on the permanent magnets. The cylindrical cover has a plurality of axially equidistantly spaced grooves defined in the outer surface thereof so as to extend circumferentially thereof. The cylindrical cover may have a continuous spiral groove in place of the plurality of axially equidistantly spaced grooves.

REFERENCES:
patent: 5475276 (1995-12-01), Shiga et al.
patent: 5486730 (1996-01-01), Ludwig et al.

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