Power converter system and method for operating a power converter system
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United States of America Patent
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Jun 12, 2018
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May 19, 2017
filing date -
May 19, 2017
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Abstract
Techniques for operating a power converter system that includes an LLC resonant converter and a non-inverting buckboost converter that is located in front of the LLC resonant converter are disclosed. In an embodiment, the output voltage of a non-inverting buckboost converter is regulated in response to the input voltage and the output voltage of an LLC resonant converter in order to maintain a desired ratio between the input voltage and the output voltage of the LLC resonant converter. For example, the ratio between the input voltage and the output voltage of the LLC resonant converter is controlled to a desired ratio that matches the turns ratio of the LLC resonant converter's transformer and that may also match (as a second order effect) the ratio of Lr to Lm.
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