DC BUS VOLTAGE HARMONICS REDUCTION
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United States of America Patent
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Issued Date -
Oct 1, 2009
app pub date -
Mar 28, 2008
filing date -
Mar 28, 2008
priority date (Note) -
Abandoned
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Abstract
In one aspect, in general, the invention features a control system configured for use with a three-phase PWM converter. The control system receives an input signal from a three-phase power supply and provides an output signal at a DC link. A voltage-separating module generates on the basis of the input signal a positive sequence voltage component and a negative sequence voltage component in a rotating reference frame. A reference current computation module uses at least the positive sequence voltage component and the negative sequence voltage component to compute a first reference current and a second reference current. A current regulating module uses at least the first reference current and the second reference current to generate a command signal. The command signal is provided to a driving circuit of the three-phase PWM converter for generating a regulated DC bus voltage at the DC link.
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