Linear motor with improved cooling

Details Linear motor with improved cooling Linear motor with improved cooling

1996-04-12

1998-07-21

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

310 52, 310 54, 310 64, H02K 900, H02K 919, H02K 922

Patent

active

057838771

ABSTRACT:
A linear motor has an epoxy core armature with dual cold plates attached to a top and a bottom of the epoxy core armature to effect cooling of the epoxy core armature. The use of dual cold plates with circulating cooling fluid reduces heat build up by providing paths of high thermal conductivity from any point in the epoxy core armature to the cold plates. Another embodiment of the invention employs ceramic heat sink plates laminated to sides of the epoxy core armature to increase the thermal conductivity and the resultant power dissipation capacity of the epoxy core armature without introducing magnetic or electrically conducting materials. Other embodiments of the invention utilize cold plates formed from extrusions of aluminum or ceramic materials. Still other embodiments have forced air cooling wherein a U-frame of the linear motor has longitudinal flexible seals and air is forced through the U-frame in which the epoxy core armature travel. Yet another embodiment has a U-frame with ducts formed therein through which air is force. Orifices connect the ducts to an interior of the U-frame through which the epoxy core armature travels.

REFERENCES:
patent: 3806782 (1974-04-01), Matsui et al.
patent: 3913045 (1975-10-01), Von Starck
patent: 4172229 (1979-10-01), Guimbal
patent: 4625132 (1986-11-01), Chitayat
patent: 4839545 (1989-06-01), Chitayat
patent: 4906878 (1990-03-01), Twaalfhoven et al.
patent: 5072146 (1991-12-01), New
patent: 5086729 (1992-02-01), Katagiri

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