Transformer core having charge dissipation facility

Details Transformer core having charge dissipation facility Transformer core having charge dissipation facility

1982-01-06

1984-10-23

Kozma, Thomas J.

Inductor devices

Core insulation

336234, H01F 2724

Patent

active

044791046

ABSTRACT:
Transformer cores are made electrically conductive during impulse voltage condition when a certain voltage is attained by a coating of semiconductor material applied to the edges or surface of the core laminations. Under ordinary operating conditions the semiconductor material provides a high resistance path to charges in the core. Upon the occurrence of a high voltage impulse, the semiconductor material rapidly equalizes the charges in the laminations and so avoids the danger of breakdown of the insulating coatings between individual laminations.

REFERENCES:
patent: 1418856 (1922-06-01), Williamson
patent: 1891716 (1932-12-01), Laffoon
patent: 2042208 (1936-05-01), Calvert
patent: 2061502 (1936-11-01), Calvert
patent: 3824683 (1974-07-01), Rhudy
patent: 4008409 (1977-02-01), Rhudy et al.
patent: 4095627 (1978-06-01), Lonseth et al.
patent: 4207482 (1980-06-01), Neumeyer et al.

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