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US 7,002,276 B2Granted
Armature with coated laminate bundle
AssigneeRobert Bosch GmbH
InventorsSusanne Evans, Juergen Herp, Matthias Henschel, Harald Bux
Life of this patent
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Abstract
An armature of the prior art has a lamination packet which leads to a high loss of magnetic flux in the lamination, since it completely encloses the magnets that are disposed in the lamination. An armature (1) of the invention comprises at least one lamination (1) that only partly encloses the magnets (24). Losses in the magnetic flux are thus reduced.
Claims1
An armature for an electrical machine, comprising at least a rotor shaft;
- at least two laminations in which at least one of said laminations has at least one closed pocket, said at least one pocket being formed by one web that is spaced apart from a base body of the armature, such that the one web connects two protrusions to one another in a manner spaced from the base body of the armature;
- at least one magnet which is retained by said at least one lamination, said magnet being disposed partly in said closed pocket of said at least one lamination, wherein the armature has a number n of said magnets, and wherein said at least one lamination has a number n−m of said closed pockets where m is less than n and greater than zero, said at least one lamination being rotated in laminations being stacked to form a lamination packet, wherein both said lamination packet end said magnets are provided with a spray-coating, so that said spray-coating fixes said laminations to form said lamination packet, and also said spray-coating fixes said magnets, disposed in said closed pockets, to said lamination packet.
Dependencies are inferred from the claim text.