Inductor devices – With temperature modifier – Heat exchanging surfaces
Patent
1977-12-08
1979-01-09
Kozma, Thomas J.
Inductor devices
With temperature modifier
Heat exchanging surfaces
29605, 29606, 336 62, 336 65, 336175, 336195, 336223, H01F 2708, H01F 2730, H01F 4102
Patent
active
041340914
ABSTRACT:
Especially simple structure for an electrical transformer device provides cost effective fabrication thereof and offers improved operating performance particularly in a radio transmitter circuit for coupling high levels of radio frequency energy from the output of a radio frequency amplifier to an antenna system. One winding of the transformer is formed from a single, unitary, tubular member arranged into a U-shaped configuration which includes a pair of spaced sets of openings therein for the two-fold purpose of allowing efficient threading of a secondary winding therewithin and to improve air cooling characteristics of the device. A second winding comprises a wire passed through the interior of the tubular member, and a number of cylindrically shaped magnetic elements are sleeved over the tubular member to enhance the mutual inductive coupling between the windings. A circuit board having a cut-out zone therethrough is especially adapted to have the transformer device mounted thereon in an essentially flat position juxtaposed over the cut-out zone to provide maximum convection and conduction cooling of the transformer and thereby significantly increase the power handling capabilities of the device.
REFERENCES:
patent: 2451324 (1948-10-01), Dutton
patent: 3197723 (1965-07-01), Dortont
patent: 3614694 (1971-10-01), Koontz
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