Controller for AC rotary machine
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United States of America Patent
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Jul 23, 2024
Grant Date -
May 25, 2023
app pub date -
May 13, 2020
filing date -
May 13, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
To provide a controller for AC rotary machine which can detect current of the normal phase certainly when the short circuit failure of one phase occurs, in an apparatus that a current sensor is connected in series to the positive electrode side switching device or the negative electrode side switching device of an inverter. A controller for AC rotary machine, when determining that the short circuit failure of any one phase occurred, calculates voltage command values of normal n−1 phases, and changes the voltage command values of the normal n−1 phases so that on period of the detection object device of each phase of the normal n−1 phases become longer than or equal to a length necessary for current detection at least at a current detection timing.
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