Power tools with switched reluctance motor

Details Power tools with switched reluctance motor Power tools with switched reluctance motor

2006-06-20

2006-06-20

Tamai, Karl (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S168000, C310S06800R, C310S071000, C173S217000, C030S388000

Reexamination Certificate

active

07064462

ABSTRACT:
A method of assembling a power tool, a power tool, a method of assembling an electrical device, and an electrical device includes a switched reluctance motor. The electrical device is preferably a hand-held power tool, however, any type of electrical device that includes a switched reluctance motor may benefit from any number of aspects of the invention. In one independent aspect, the invention provides a construction that reduces tolerance stack-up. In another independent aspect, the invention provides a self-contained electronics package that plugs into a switched reluctance motor to provide control operation of the switched reluctance motor. In another independent aspect, the invention provides enhanced cooling that increases the efficiency of the electrical device using a switched reluctance motor. In another independent aspect, the invention provides an encapsulated magnet that allows for contaminant free motor control over the life of the SR motor. In another independent aspect, the invention provides an apparatus and a method for aligning magnets of a magnet hub with respect to the rotor poles the magnet poles represent.

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Reciprocating saw manufactured by Milwaukee Electric Tool Corporation that includes a magnet hub, the magnet hub being offered for sale as early as Apr. 2000 (see attached statement of relevance and FIGS. 1-3).

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