OPTIMIZED START-UP SCHEME FOR ISOLATED CASCADED AC/DC POWER CONVERTERS
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Dec 17, 2024
filing date -
Dec 17, 2024
priority date (Note) -
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status (Latency Note)
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Abstract
In one embodiment, a method includes receiving DC bus voltage conditions of multiple AC to DC converters of an Input-Series-Output-Parallel power converter during a rectification stage; detecting a peak voltage of each of the DC bus of the multiple AC to DC converters has reached a first threshold voltage, and a Phase Loop Lock locked signal; upon detecting that the PLL locked signal, enabling a first voltage regulation to charge an AC to DC output of each of the multiple AC to DC converters to reach a first reference voltage; determining operating conditions including a load condition and an output voltage condition of multiple Dual Active Bridge (DAB) converters, and a monitored voltage of each of the multiple AC to DC converters; enabling a second voltage regulation of each of the multiple DAB converters to charge a DAB output to reach a second reference voltage based on the operating condition.
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