Magnetic bearings coil heat removal

Details Magnetic bearings coil heat removal Magnetic bearings coil heat removal

1990-07-27

1991-12-10

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 64, 310214, H02K 3487, H02K 922

Patent

active

050721461

ABSTRACT:
A magnetic bearing assembly includes at least one electromagnet with a coil at least partially enclosed by a ferrogmagnetic core. Because of this arrangement, heat, inevitably generated within the coil in a conventional bearing, may cause the temperatures of the coil and adjacent parts of the electromagnet to rise to unacceptable values. These temperatures are reduced by placing a heat conducting member, say of copper, contiguous with the coil, and possibly inserted into the coil. Heat is conducted at a high rate to an exposed portion of the member, and is extracted efficiently therefrom by windage, or air flow, created within the apparatus having the magnetic bearing. Advantageously, the exposed portion of the heat conducting member has an extensive surface.

REFERENCES:
patent: 3810303 (1974-05-01), Hoell
patent: 3913045 (1975-10-01), Von Starck
patent: 4180296 (1979-12-01), Habermann
patent: 4345175 (1982-08-01), Jones
patent: 4409502 (1983-10-01), McCabria
patent: 4900964 (1990-02-01), Ying et al.

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