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US 9,438,098 B2Granted
Apparatus and method for controlling module switching of power converting system
AssigneeHyosung Corporation
InventorsJune-Sung Kim, Jong-Yun Choi
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Abstract
A technology is disclosed for controlling switching of power converters included in a power converting system. Phase angles are allocated to a plurality of sub-units corresponding to the power converters, and the respective sub-units create local switching carriers based on the allocated phase angles. The sub-units compare a reference AC voltage with the local switching carriers, and switch the power converters according to the result of the comparison.
Claims15
An apparatus for converting power comprising:
- a central controller that generates a reference AC voltage;
- a phase leg including a plurality of power converters;
- and
- a plurality of sub-units,
- wherein the central controller allocates respective different phase angles to the respective sub-units, and the respective sub-units individually create local switching carriers based on the allocated phase angles, and controls switching of the power converters corresponding to the respective sub-units according to a result of a comparison of the individually created local switching carriers and the reference AC voltage,
- wherein the local switching carriers created by the respective sub-units are sinusoidal waves each having a same frequency and the respective different phase angle from each other allocated by the center controller, and
- wherein, when the number of the power converters is M, a difference between any two of the allocated phase angles is a multiple of 2π/M.
4 more elements
A method of converting power, comprising:
- allocating different phase angles to a plurality of sub-units, respectively, by a central controller;
- individually creating local switching carriers based on the allocated phase angles, by the respective sub-units;
- and
- controlling switching of power converters included in a phase leg and corresponding to the respective sub-units according to a result of a comparison of the individually created local switching carriers and a reference AC voltage, by the respective sub-units,
- wherein the local switching carriers created by the respective sub-units are sinusoidal waves each having a same frequency and the respective different phase angle from each other allocated by the center controller, and
- wherein, when the number of the power converters is M, a difference between any two of the allocated phase angles is a multiple of 2π/M.
3 more elements
Dependencies are inferred from the claim text.