Power converter transformer having an auxilliary winding and ele

Details Power converter transformer having an auxilliary winding and ele Power converter transformer having an auxilliary winding and ele

1996-03-05

1998-03-03

Sterrett, Jeffrey L.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 20, 363131, H02M 112

Patent

active

057242364

ABSTRACT:
A reduced noise power converter is provided with a transformer having primary, secondary, and auxiliary windings (22, 24, and 46). An electrostatic shield (26) having a shield termination (32) is disposed between the primary and secondary windings. The auxiliary winding has the opposite polarity of the primary winding, and is coupled between the shield termination and the input voltage source (12). By appropriate selection of the number of turns of the auxiliary winding, noise coupled from the primary side to the secondary side through the stray device capacitance (34) is neutralized.

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patent: 3582754 (1971-06-01), Hoffmann
patent: 3963975 (1976-06-01), Gauper et al.
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patent: 4484171 (1984-11-01), McLoughlin
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patent: 5107411 (1992-04-01), Misdom
patent: 5430638 (1995-07-01), Oikawa
patent: 5448465 (1995-09-01), Yoshida

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