Motor actuator and power steering apparatus using the same
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United States of America Patent
Stats
-
Nov 26, 2019
Grant Date -
Mar 14, 2019
app pub date -
Feb 13, 2017
filing date -
Mar 14, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Short circuit abnormality between redundant systems with respect to motor redundant systems is detected. A motor actuator includes a first inverter circuit configured to control power supplied to a first motor stator, a second inverter circuit configured to control power supplied to a second motor stator, and a control unit portion including a calculation circuit. The control unit portion includes a first inverter control portion configured to output a control signal for controlling driving of the first inverter circuit, a second inverter control portion configured to output a control signal for controlling driving of the second inverter circuit, and a short circuit determination portion configured to, when the power is supplied only to one inverter circuit of the first inverter circuit and the second inverter circuit by the first inverter control portion or the second inverter control portion, determine presence/absence of a short circuit between the first motor stator and the second motor stator based on a conductive state of the other inverter circuit of the first inverter circuit and the second inverter circuit.
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