Multi-phase resonant converter and method of controlling it
AssigneeSTMicroelectronics S.r.l.
InventorsClaudio Adragna, Giuseppe Gattavari, Paolo Mattavelli, Enrico Orietti, Giorgio Spiazzi
Life of this patent
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Abstract
A PWM controlled multi-phase resonant voltage converter may include a plurality of primary windings powered through respective half-bridges, and as many secondary windings connected to an output terminal of the converter and magnetically coupled to the respective primary windings. The primary or secondary windings may be connected such that a real or virtual neutral point is floating.
Claims24
A method comprising:
- supplying a voltage with a voltage generator to a plurality of drivers, the voltage generator coupled to a primary ground terminal, each driver having an output coupled to respective primary windings of a plurality of primary windings, each driver having a reference supply terminal coupled to the primary ground terminal, each primary winding being magnetically coupled to respective secondary windings;
- and
- balancing currents flowing through the plurality of primary windings via a first floating node, wherein each primary winding is coupled to the first floating node via respective first capacitors.
A method of operating a resonant converter, the method comprising:
- supplying a voltage with a voltage generator to a plurality of drivers of the resonant converter, the voltage generator coupled to a ground terminal, each driver having an output coupled to respective primary windings of a plurality of primary windings, each driver having a reference supply terminal coupled to the ground terminal, each primary winding being magnetically coupled to respective secondary windings;
- and
- balancing currents flowing through the plurality of primary windings via a second floating node, wherein each secondary winding is directly connected to the second floating node.
A method of operation a three-phase resonant LLC converter comprising a first, second, and third phase circuits, the method comprising:
- supplying a voltage with a voltage generator to an input terminal, the input terminal coupled to a first, second, and third drivers of the respective first, second and third phase circuits, the voltage generator coupled to a primary ground terminal, each of the first, second, and third drivers having an output coupled to respective first, second, and third primary windings, each driver having a reference supply terminal coupled to the primary ground terminal, each primary winding being magnetically coupled to respective first, second, and third secondary windings;
- and
- balancing currents flowing through the first, second, and third primary windings via a first floating node, wherein each primary winding is coupled to the first floating node via respective first capacitors.
Dependencies are inferred from the claim text.