Control apparatus for multi-phase rotary machine and electric power steering system
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United States of America Patent
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Sep 11, 2012
Grant Date -
Mar 31, 2011
app pub date -
Sep 29, 2010
filing date -
Sep 30, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control apparatus for a multi-phase rotary machine includes a control unit and a plurality of power supply systems including respective inverter units. When a short-circuiting failure occurs in one of the systems due to an ON-failure in any one of FETs in an inverter unit of the failure system, the control unit stops driving of the rotary machine by bringing all the FETs in the failure system into the OFF state. The control unit controls FETs of the non-failure system such that a brake torque generated in the failure system is cancelled or the influence of the brake torque exerted on the driving of the motor is reduced.
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