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US 2018/0019685 A1Published application
Power converter
AssigneeOMRON Corporation
InventorsTomomi YAMASHITA, Kenji KOBAYASHI, Masao MABUCHI, Satoru IKEMOTO
Life of this patent
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Abstract
During a single-phase three-wire output control process for causing a neutral point clamped inverter circuit to have a single-phase three-wire output, a power converter performs a potential control process for changing a potential of the O terminal to a positive or negative value to allow more power to be consumed from power stored in one of first and second capacitors with a higher voltage than from power stored in the other one of the first and second capacitors.
Claims7
A power converter, comprising:
- a neutral point clamped inverter circuit including a first capacitor and a second capacitor that are connected in series to divide an input direct-current (DC) voltage by half, a plurality of switching elements, and first to third output terminals;
- and
- a controller configured to perform a single-phase three-wire output control process for causing the inverter circuit to output a first AC voltage from between the first output terminal and the second output terminal and to output a second AC voltage having an inverted polarity from the first AC voltage from between the third output terminal and the second output terminal,
- wherein during the single-phase three-wire output control process, the controller performs a potential control process for changing a potential of the second output terminal to a positive or negative value to allow more power to be consumed from power stored in one of the first and second capacitors with a higher voltage than from power stored in the other one of the first and second capacitors.
1 more element
Dependencies are inferred from the claim text.