Motor control device including electric storage device and resistance discharge device
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United States of America Patent
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Aug 25, 2015
Grant Date -
Jul 31, 2014
app pub date -
Jan 28, 2014
filing date -
Jan 29, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A motor control device includes a rectifier, an inverter connected to the rectifier via the DC link, a power failure detecting unit detecting power failure, a voltage detecting unit detecting a DC voltage at the DC link, an electric storage unit storing DC power, a charging unit that can make charging by boosting to a voltage higher than the DC voltage, a discharging unit discharging DC power, a resistance discharge device that performs resistance discharging of DC power at the DC link when the DC voltage after power failure is equal to or higher than a predetermined start level and that does not perform resistance discharging when the DC voltage is equal to or lower than a predetermined stop level, and a discharging operation determining unit operating the discharging unit when the DC voltage at the DC link after power failure is equal to or lower than a predetermined threshold.
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