Method and apparatus for improving output of a multi-winding motor
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United States of America Patent
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Mar 31, 2015
Grant Date -
Mar 27, 2014
app pub date -
Sep 21, 2012
filing date -
Sep 21, 2012
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Abstract
A technique for controlling drive currents to respective windings of a multi-winding brushless motor comprises monitoring an output of the motor and a demand of the motor, determining whether a failure mode has occurred, the failure mode being an instantaneous complete or partial failure to generate demanded output; and, upon detection of a failure mode on a first winding, distributing a demand contribution that is not being produced by the first winding to one or more of the windings that are not in a failure mode. The demand may be torque demand, and the failure modes may include winding failure, and voltage and/or current saturation. Improved torque output is generated by the redistribution of demand among phases in the event of a failure mode.
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