Methods, systems and apparatus for controlling operation of an electric machine in an overmodulation region
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United States of America Patent
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Sep 9, 2014
Grant Date -
Jul 4, 2013
app pub date -
Dec 28, 2011
filing date -
Dec 28, 2011
priority date (Note) -
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Abstract
Embodiments of the present disclosure relate to methods, systems and apparatus for controlling operation of an electric machine in a vector controlled motor drive system when the electric machine operates in an overmodulation region. The disclosed embodiments can reduce variations/errors in the phase voltage command signals applied to the multi-phase machine so that phase current may be properly regulated thus reducing current/torque oscillation, which can in turn improve machine efficiency and performance, as well as utilization of the DC voltage source.
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