Method and apparatus for reducing radiated emissions in switching power converters
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United States of America Patent
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Mar 3, 2015
Issued Date -
N/A
app pub date -
Jul 31, 2012
filing date -
Jul 31, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a DC voltage input to generate a desired AC voltage output. Capacitors are connected in parallel between each output phase and a common connection, which may be a ground connection. The magnitude and layout of the capacitors are selected to minimize current conducted by the capacitors. The capacitors may be surface mount technology located proximate to the switching devices or the capacitors may be incorporated in the circuit board on which the switching devices are mounted. The filter may be applied to any of the switching elements in a motor drive, such as the inverter section, an active rectifier section, or a switched mode power supply.
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