Control device for direct power converter
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United States of America Patent
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May 26, 2020
Grant Date -
Apr 2, 2020
app pub date -
Jun 28, 2018
filing date -
Jun 30, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A normalized-link-current estimation unit adopts a first value calculated by using a virtual DC voltage command, a phase and an amplitude of a single-phase AC voltage, and a distribution factor, as an estimated value of a value obtained by normalizing a link current flowing from a DC link to an inverter. A calculation unit determines a second value calculated by using the virtual DC voltage command, a rectified voltage, and a both-end voltage. When a normalized current command is less than a product of the first value and the second value, a normalized charge command is set to 0 and a rectifying duty is determined by dividing the normalized current command by the first value.
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