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US 6,721,191 B2Granted
Resonant converter
AssigneeKoninklijke Philips Electronics N.V.
InventorsThomas Duerbaum, Reinhold Elferich
Life of this patent
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Abstract
The invention relates to a resonant converter (1) which has multiple outputs (7a, 7b) and contains a transformer (4) with a primary winding (5) and at least two secondary windings (6a, 6b) having different winding directions. In this way it is possible to design as cost-effectively as possible a resonant converter with multiple outputs, two of which can be controlled separately from each other.
Claims19
A resonant converter comprising:
- multiple converter outputs;
- a transformer including a primary winding and at least two secondary windings of different winding directions, each secondary winding being electrically connected to one of said multiple converter outputs;
- at least two switching elements for chopping an input d-c voltage to yield a chopped input d-c voltage;
- and
- a feedback loop including a regulating circuit for regulating a frequency and a duty cycle of the chopped input d-c voltage.
2 more elements
A resonant convert comprising:
- an inverter operable to convert a d-c voltage into an a-c voltage;
- a transformer including
- a first secondary winding electrically connected to said inverter to generate a first secondary voltage as a function of the a-c voltage, and
- a second secondary winding electrically connected to said inverter to generate a second secondary voltage as a function of the a-c voltage,
- wherein said first secondary winding and said second secondary winding have different winding directions;
- and
- a regulation circuit electrically connected to said first secondary winding and said second secondary winding to regulate a frequency and a duty cycle of the a-c voltage as a function of the first secondary voltage and the second secondary voltage.
4 more elements
A resonant converter, comprising:
- an inverter operable to convert a d-c voltage into an a-c voltage;
- a transformer including
- a first secondary winding electrically connected to said inverter to generate a first secondary voltage as a function of the a-c voltage, and
- a second secondary winding electrically connected to said inverter to generate a second secondary voltage as a function of the a-c voltage,
- wherein said first secondary winding and said second secondary winding have different winding directions;
- and
- means for regulating a frequency and a duty cycle of the a-c voltage as a function of the first secondary voltage and the second secondary voltage.
4 more elements
Dependencies are inferred from the claim text.