Electromagnetic heating devices, particularly for ram air turbin

Details Electromagnetic heating devices, particularly for ram air turbin Electromagnetic heating devices, particularly for ram air turbin

1993-12-02

1996-09-24

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

With heating, cooling or thermal insulation means

415177, 219635, 219618, 244134D, F01D 508

Patent

active

055584950

ABSTRACT:
Apparatus is provided for creating heat by electromagnetic induction between relatively rotating components. In RAT applications, part of the nose cone (34) is formed from electrically conductive material (106) which is in thermally conductive relation to the nose cone exterior. A magnetic field is created by components (60) that are spaced apart from the electrically conductive material and relatively rotatable with respect to that material. The electrically conductive material intersects the magnetic field, at least in part, such that eddy currents are created in the electrically conductive material by relative rotation with respect to the magnetic field. These eddy currents create heat which is conducted to the exterior surface of the RAT nose cone. Preferably, the magnetic field is created by a pair of spaced-apart permanent magnets (60) mounted on a support plate (62) inside the RAT hub (28) and immediately behind the nose cone. The effect of the magnetic field in heating the nose cone can be increased by use of magnetically permeable material to form the support plate and/or part of the nose cone adjacent or integral with the electrically conductive material.

REFERENCES:
patent: 2488392 (1949-11-01), Forsyth
patent: 2547934 (1951-04-01), Gill
patent: 2701092 (1955-02-01), Henshaw
patent: 2709892 (1955-06-01), Martin
patent: 3455396 (1969-07-01), Cummings
patent: 4486638 (1984-12-01), deBennetot

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