Charge and discharge system for electric power storage equipment
AssigneeHitachi, Ltd.
InventorsKenji Kubo, Takahiro Nomura, Norikazu Tokunaga, Hideki Miyazaki, Akihiko Emori
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Abstract
A charge and discharge apparatus for electric power storage means has an AC power source, a transforming apparatus, which comprises a primary winding connected to the AC power source, and plural secondary windings, and plural electric power converters comprising plural AC sides, respective ones of which are connected to a respective one of the plural secondary windings, and plural DC sides, respective ones of which are connected to a respective one of the plural electric power storage means.
Claims13
A charge and discharge apparatus for electric power storage means comprising:
- an AC power source;
- a transforming apparatus, which comprises a primary winding connected to said AC power source, and plural secondary windings;
- and
- plural electric power converters comprising plural AC sides to be connected to said plural secondary windings, and plural DC sides to be connected to plural electric power storage means;
- wherein said AC power source comprises an electric power converting portion to be connected to said primary winding;
- and
- wherein said electric power converting portion is controlled so that the current flown to said primary winding becomes a current reference.
A charge and discharge apparatus for electric power storage means comprising:
- an AC power source;
- a transforming apparatus, which comprises a primary winding connected to said AC power source, and plural secondary windings;
- and
- plural electric power converters comprising plural AC sides to be connected to said plural secondary windings, and plural DC sides to be connected to plural electric power storage means;
- wherein said AC power source comprises an electric power converting portion to be connected to said primary winding;
- wherein said transforming apparatus comprises plural transformers, said primary winding is composed by connecting primary side windings of said plural transformers in parallel, and said secondary winding is composed of plural secondary windings of said plural transformers;
- and
- wherein said plural electric power converters comprise:
- plural electric power converting circuits including said plural AC sides, and plural chopper circuits including said plural DC sides.
A charge and discharge apparatus for electric power storage means comprising:
- an AC power source;
- a transforming apparatus, which comprises a primary winding connected to said AC power source, and plural secondary windings;
- plural electric power converters comprising plural AC sides to be connected to said plural secondary windings, and plural DC sides;
- and
- terminals to be connected to the electric power storage means, to which both ends of the series connection of said plural DC sides are connected;
- wherein an output voltage of at least one of said plural electric power converters is constant, and an output voltage of at least an other one of said plural electric power converters is variable.
A charge and discharge apparatus for electric power storage means comprising:
- an AC power source;
- a first AC/DC power converting means connected to said AC power source;
- a second AC/DC power converting means connected to a DC output of said first AC/DC power converting means;
- primary windings of plural transformers being connected in series to AC output terminals of said first AC/DC power converting means;
- each of secondary windings of said plural transformers being provided with a rectifier;
- each of outputs of said rectifiers being connected to said electric power storage means via a first switching means;
- and
- each of the outputs of said rectifiers being provided with a second switching means for effecting a short circuit of the output of said rectifiers.
A charge and discharge apparatus for electric power storage means as claimed in 9, wherein said control means makes a current flowing in the secondary winding of the transformer bypass by one of turning off each of said first switching means and turning off each of one side of switching elements of said full bridge converters, and concurrently, by one of turning on said second switching means connected to the secondary side of the same transformer and turning on each of an other side of switching elements of said full bridge converters.
A charge and discharge apparatus for electric power storage means comprising:
- an AC power source;
- a first AC/DC bidirectional power converting means connected to said AC power source;
- and
- a second AC/DC bidirectional power converting means connected to a DC output of said first AC/DC bidirectional power converting means;
- an electric power supply bus wire connected to an AC output terminal of said second AC/DC bidirectional power converting means, and concurrently, primary windings of plural transformers are connected in parallel to said electric power supply bus wire;
- each of secondary windings of said plural transformers is provided with a third AC/DC bidirectional power converting means;
- and
- each of outputs of said third AC/DC bidirectional power converting means is connected to said electric power storage means via a first switching means.
Dependencies are inferred from the claim text.