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US 9,318,974 B2Granted
Multi-level inverter with flying capacitor topology
AssigneeSolaredge Technologies Ltd.
InventorsIlan Yoscovich, Tzachi Glovinsky, Guy Sella, Yoav Galin
Life of this patent
Estimating the term…
Abstract
A multi-level inverter having one or more banks, each bank containing a plurality of low voltage MOSFET transistors. A processor configured to switch the plurality of low voltage MOSFET transistors in each bank to switch at multiple times during each cycle.
Claims25
An apparatus comprising:
- a multi-level inverter comprising a first phase circuit and a second phase circuit, each of the first and the second phase circuits comprising a flying capacitor circuit;
- a first set of switches connecting the first phase circuit between voltage input terminals and a second set of switches connecting the second phase circuit between the voltage input terminals;
- and
- an interphase balancing circuit comprising a first pair of terminals connected in parallel across the first phase circuit and a second pair of terminals connected in parallel across the second phase circuit.
1 more element
A method comprising:
- switching a first phase circuit and a second phase circuit of a multilevel inverter at a first frequency;
- switching a first pair of switches and a second pair of switches of the multilevel inverter at a second frequency, the first pair of switches connecting the first phase circuit between a pair of voltage input terminals and the second pair of switches connecting the second phase circuit between the pair of voltage input terminals;
- and
- removing ripple voltage at the second frequency across the first phase circuit and across the second phase circuit by sharing current between the first phase circuit and second phase circuit.
1 more element
Dependencies are inferred from the claim text.