Control device for rotary electrical machine and control method
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United States of America Patent
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Mar 5, 2019
Grant Date -
Apr 26, 2018
app pub date -
Oct 16, 2017
filing date -
Oct 20, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The control device for a rotary electrical machine which is connected between a DC power source and a rotary electrical machine and which controls driving of the rotary electrical machine by converting DC power from the DC power source into AC power, includes a power conversion circuit which is configured from a plurality of switching elements, a phase current detection unit which detects phase currents in the rotary electrical machine, a phase current ratio derivation unit which derives a ratio in which the phase currents detected by the phase current detection unit are equal to or greater than a reference value, or equal to or lower than the reference value, and an element fault determination unit which determines a fault status of each of the switching elements when the ratio derived by the phase current ratio derivation unit is equal to or greater than a previously established ratio threshold value.
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