Motor driving device and electric power steering apparatus including motor driving device
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United States of America Patent
Stats
-
Jan 27, 2015
Issued Date -
N/A
app pub date -
Aug 13, 2013
filing date -
Aug 27, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a motor driving device, a first relay portion is connected between a power source and an inverter portion, a second relay portion is connected between the first relay portion and the inverter portion, and a motor relay portion is connected between the inverter portion and a winding group of a motor. Inverter pre-driver circuits respectively drive switching elements of the inverter portion. A first pre-driver circuit drives the first relay portion. A second pre-driver circuit drives the second relay portion and the motor relay portion. A controller controls driving of the inverter portion, the first relay portion, the second relay portion, and the motor relay portion, and detects a failure of the first relay portion, the second relay portion, and the motor relay portion.
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