Multilevel converter circuit and method
AssigneeSolaredge Technologies Ltd.
InventorsMeir Gazit, Menashe Walsh
Life of this patent
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Abstract
A power conversion system including a first converter configured to convert an input voltage into a plurality of discrete voltages. A second converter configured to convert the plurality of discrete voltages into a plurality of modulated voltages. Each modulated voltage of the plurality of modulated voltages comprises two voltage levels equal, respectively, to two of the discrete voltages of the plurality of discrete voltages. A selection unit configured to alternatively output each modulated voltage of the plurality of modulated voltages across a pair of output terminals.
Claims20
A system comprising:
- a first converter comprising first switching circuitry configured to convert an input voltage into a plurality of discrete voltages;
- a second converter comprising second switching circuitry configured to convert the plurality of discrete voltages into a plurality of modulated voltages, wherein each modulated voltage of the plurality of modulated voltages comprises two voltage levels equal, respectively, to two of the discrete voltages of the plurality of discrete voltages;
- and
- a selection circuit configured to alternatively output each modulated voltage of the plurality of modulated voltages across a pair of output terminals,
- wherein the first converter is controlled according to a first modulation scheme based on an electrical parameter,
- wherein the second converter is controlled according to a second modulation scheme based on the electrical parameter,
- wherein the selection circuit is controlled according to a third modulation scheme based on at least one of the electrical parameter or a reference signal, and
- wherein a frequency of at least one of the first modulation scheme or the second modulation scheme is lower than a frequency of the third modulation scheme.
A method comprising:
- converting, by a first converter, an input voltage into a plurality of discrete voltages;
- converting, by a second converter, the plurality of discrete voltages into a plurality of modulated voltages, wherein each modulated voltage of the plurality of modulated voltages comprises two voltage levels equal, respectively, to two of the discrete voltages of the plurality of discrete voltages;
- and
- alternatively outputting, by a selection circuit, each modulated voltage of the plurality of modulated voltages across a pair of output terminals,
- wherein the converting by the first converter is performed according to a first modulation scheme based on an electrical parameter,
- wherein the converting by the second converter is performed according to a second modulation scheme based on the electrical parameter,
- wherein the alternatively outputting by the selection circuit is performed according to a third modulation scheme based on at least one of the electrical parameter or a reference signal, and
- wherein a frequency of at least one of the first modulation scheme or the second modulation scheme is lower than a frequency of the third modulation scheme.
Dependencies are inferred from the claim text.