Koninklijke Philips Corporation N.V.

Hendrikus Johannes Jacobus Domensino

Tobias Georg Tolle

Pieter Jan Mark Smidt

Thomas Duerbaum

Hendrikus Johannes Janssen

Arjan Van Den Berg

Hendrik Jan Boswinkel

The present invention relates to a bidirectional flyback switch mode power supply (SMPS), such as a bidirectional flyback converter, and a method for operating it. The SMPS comprises a transformer having primary and secondary windings inductively coupled together, said primary winding being coupled to a voltage input of the converter and said secondary winding being coupled to a voltage output of the converter; a primary control unit comprising a primary switch arranged in series with the primary winding and a secondary control unit comprising a secondary switch arranged in series with the secondary winding. The primary control unit is adapted to compensate input voltage variations, and the secondary control unit is adapted to provide a controlled output power on the secondary side.

Bidirectional flyback switch mode power supply (SMPS)

The invention relates to a transformer () with a core () which has a center piece () with a first and a second flange (), in which a first and a second winding () of the transformer () are wound on the center piece (). To produce a transformer as compact as possible which allows simple adaptation to limit leakage currents, it is proposed that the winding end pieces () of the first winding () guided out of the winding body are guided through at least one recess in the first flange () and that winding end pieces () of the second winding () guided out of the winding body are provided which form at least partly loose line ends. Alternatively, the winding end pieces () of the first winding () guided out of the winding body are guided immediately about the edge of the first flange () and connected with connecting elements () which are arranged on the side of the first flange () opposite the center piece ().

Transformer

A power supply arrangement having a DC/DC converter is presented that includes a control loop on the primary side of the isolation transformer within the DC/DC converter to control the voltage on the primary winding. The energy transfer across the isolation transformer is effected via control switches that alternately charge and discharge a capacitor through the primary winding. The control loop preferably adjusts the duty cycle of these control switches to control the voltage on the primary winding.

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Eindhoven, Netherlands

Hendrikus Johannes Jacobus Domensino