ELECTRIC POWER CONVERSION DEVICE AND CONTROL METHOD OF ELECTRIC POWER CONVERSION DEVICE
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United States of America Patent
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Issued Date -
Dec 7, 2023
app pub date -
Oct 7, 2021
filing date -
Oct 13, 2020
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Abstract
In an electric power conversion device according to an embodiment, a chopper converts electric power from a power supply into direct-current power. An inverter converts the direct-current power into alternating-current power. Pairs of resonant capacitors are connected to a direct-current input section of the inverter. Each of the pairs is in series. Primary windings of high-frequency transformers are connected to the inverter and respective midpoints of the pairs of resonant capacitors. The high-frequency transformers convert the alternating-current power of the inverter. Rectifiers convert alternating-current power supplied from secondary windings of the high-frequency transformers into direct-current power. One or more voltage detectors detect output voltage of one or more of the rectifiers. A control device controls the chopper on the basis of output of the voltage detectors such that an output voltage of the direct-current power comes to a predetermined voltage value.
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