Motor driving apparatus having discharging function
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United States of America Patent
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Mar 5, 2019
Grant Date -
Aug 3, 2017
app pub date -
Jan 13, 2017
filing date -
Jan 29, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A motor driving apparatus includes an AC-DC conversion unit that converts AC power into DC power, a power storage unit provided in a DC link between the AC-DC conversion unit and a DC-AC conversion unit, an initial charging unit that is provided in the DC link, includes a switch unit and a charging resistor connected to the switch unit in parallel, and initially charges the power storage unit, an electromagnetic contactor that opens and closes an electrical path between the AC power source and the AC-DC conversion unit, and a control unit, and after completion of driving of a motor, the control unit performs an opening operation on the electromagnetic contactor and the switch unit and performs a turn-on operation on each of the switching devices provided on the upper and lower arms in the same phase to discharge charge stored in the power storage unit by the charging resistor.
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