Multilevel converter systems and methods with reduced common mode voltage
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United States of America Patent
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Dec 13, 2016
Grant Date -
Jul 9, 2015
app pub date -
Jan 9, 2014
filing date -
Jan 9, 2014
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Abstract
Multilevel converters and space vector modulation operating methods are presented in which fewer than all possible switching states are employed for space vector modulation of rectifier and inverter circuits to promote common mode voltage contribution cancellation or reduction therebetween and by using subsets of possible space vector modulation switching states associated with minimal positive or negative common mode voltages and in some cases using virtual vectors which have zero common mode voltages to eliminate the 3rd order harmonic components in common mode voltage as well as to reduce common mode voltage affects associated with multilevel inverter stages.
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