Method for making rotor for permanent magnet electric machine

Details Method for making rotor for permanent magnet electric machine Method for making rotor for permanent magnet electric machine

2008-04-01

2008-04-01

Phan, Tim (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S423000, C029S455100, C029S596000, C029S608000, C310S043000, C310S074000, C310S089000, C310S156050, C310S156120

Reexamination Certificate

active

10854447

ABSTRACT:
A method for making a rotor for a permanent magnet electric motor comprising the steps of providing an annular permanent magnet and an annular back-up member. Affixing the magnet to the inner surface of the back-up member in an un-magnetized condition and overmolding both in an injection molding process while controlling the flow of the molten plastic so as to cause the plastic to engage the opposite sides of the magnet at substantially the same time resulting in a knit line intermediate the magnet sides on the inner surface of the magnet. Magnetizing the magnet.

REFERENCES:
patent: 5907206 (1999-05-01), Shiga et al.
patent: 6998748 (2006-02-01), Yeh et al.

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