Inverter with at least two DC/DC converters and use of such an inverter in a photovoltaic installation
AssigneeSMA Solar Technology AG
InventorsStefan Buchhold, Jens Friebe, Michael Kotthaus, Torsten Soederberg, Thomas Wappler, Ephraim Moeser
Life of this patent
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Abstract
The disclosure relates to an inverter with at least one inverter bridge and at least two galvanically isolating DC/DC converters, outputs of the DC/DC converters being connected in parallel with one another and being connected to inputs of the inverter bridge. At least two of the DC/DC converters are intercoupled on the input side via a diode, such that the diode is connected with its terminals to one of the inputs of the two direct voltage converters in each case. The disclosure also relates to a use for such an inverter.
Claims9
An inverter, comprising:
- at least one inverter bridge;
- and
- at least two galvanically isolating DC/DC converters whose inputs form DC terminals of the inverter,
- wherein outputs of the DC/DC converters are connected to one another in parallel and are connected to inputs of the inverter bridge, and
- wherein at least two of the DC/DC converters are intercoupled on the input side thereof via a diode, wherein the diode is connected with its terminals between one of the inputs of the at least two of the DC/DC converters.
A method of use of an inverter, comprising at least one inverter bridge;
- and at least two galvanically isolating DC/DC converters whose inputs form DC terminals of the inverter, wherein outputs of the DC/DC converters are connected to one another in parallel and are connected to inputs of the inverter bridge, wherein at least two of the DC/DC converters are intercoupled on the input side thereof via a diode, wherein the diode is connected with its terminals between one of the inputs of the at least two of the DC/DC converters, comprising:
- providing a PV generator comprising a series connected string of PV modules, and
- connecting the PV generator to two inputs of the inverter which are assigned to two different DC voltage converters, the two different DC/DC converters forming end elements of a series circuit of DC/DC converters intercoupled to one another via diodes.
A method of use of an inverter, comprising at least one inverter bridge;
- and at least two galvanically isolating DC/DC converters whose inputs form DC terminals of the inverter, wherein outputs of the DC/DC converters are connected to one another in parallel and are connected to inputs of the inverter bridge, wherein at least two of the DC/DC converters are intercoupled on the input side thereof via a diode, wherein the diode is connected with its terminals between one of the inputs of the at least two of the DC/DC converters, comprising:
- providing a plurality of PV modules as a module inverter configuration, and
- connecting each PV module to the two respective inputs of the at least two DC/DC converters.
Dependencies are inferred from the claim text.