Active Neutral-Point-Clamped (ANPC) Converters and Operating Methods Thereof
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United States of America Patent
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Issued Date -
Dec 1, 2016
app pub date -
May 31, 2015
filing date -
May 31, 2015
priority date (Note) -
Abandoned
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Abstract
Five or more level active neutral-point-clamped (ANPC) converters and operating methods thereof are disclosed. The five or more level ANPC converters may include upper and lower DC links, a neutral point, a converter output, a plurality of switching devices including upper and lower active neutral clamp switching devices, and at least one two-level cell connected to the output. Each of the two-level cells may include a floating capacitor and a bidirectional switch. In some examples, switches may be connected between the upper and lower DC links and the corresponding upper and lower active neutral clamp switching devices, and circuit breaking elements may be connected between the neutral point and the upper and lower active neutral clamp switching devices. In some examples, a bidirectional switch may be connected in parallel with each of the plurality of switching devices other than the upper and lower active neutral clamp switching devices.
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