Switchable inductor for strong currents

Details Switchable inductor for strong currents Switchable inductor for strong currents

1993-05-07

1995-05-02

Dougherty, Thomas M.

Electricity: power supply or regulation systems

Including a transformer or an inductor

333174, 334 56, 334 59, 343861, H01F 2100, H03J 500

Patent

active

054123100

ABSTRACT:
Switchable inductors for strong currents are used especially in antenna tuning circuits. The value of the inductance between the terminals of the primary winding of an air-core static transformer is different depending on whether the secondary winding of the transformer is placed in an open circuit or in a short circuit by switching means formed by power semiconductor elements. Application in particular to antenna coupling circuits for VLF stations working by frequency hop transmission with highly selective antennas.

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patent: 4131839 (1978-12-01), Springer
patent: 4439742 (1984-03-01), Sondermeyer
patent: 4585974 (1986-04-01), Stupp et al.
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patent: 4670692 (1987-06-01), Meigs
patent: 4701732 (1987-10-01), Nestlerode
patent: 4881129 (1989-11-01), Mitsuhashi
patent: 5003260 (1991-03-01), Auchterlonie
patent: 5047911 (1991-09-01), Sperzel et al.
patent: 5218317 (1993-06-01), Boulzaguet et al.

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