Method for producing an encased rotor of a permanent magnet

Details Method for producing an encased rotor of a permanent magnet Method for producing an encased rotor of a permanent magnet

2005-10-25

2005-10-25

Mullins, Burton (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S087000, C029S598000

Reexamination Certificate

active

06958555

ABSTRACT:
The method serves for manufacturing a canned rotor of a permanent magnet motor. Firstly a shaft (2) provided with a rotor core [rotor laminated sheet package] (3) together with a pre-blank (11) forming the later magnet and a [sheet] metal casing (6) surrounding the pre-blank is applied with play into a pressing tool (12). The pre-blank (11) is then deformed by way of end-face pressure impingement such that it then bears with a non-positive fit and over the whole surface on the rotor core [rotor laminated sheet package] (3) and on the [sheet] metal casing (6), wherein the casing (6) is widened radially until its bearing on the pressing tool (12) by way of the radially widening pre-blank (11). After this the magnetisation and hardening is effected, whereupon the free spaces remaining between the [sheet] metal casing (6) and lid (2) are closed by two annular lids, which are tightly connected to the [sheet] metal casing (6) and the shaft (2) with a material fit.

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