Filter device
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United States of America Patent
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Oct 20, 2009
Grant Date -
Oct 12, 2006
app pub date -
Mar 14, 2003
filing date -
Nov 11, 2002
priority date (Note) -
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Abstract
A filter device that suppresses electromagnetic interference generated in an alternating current circuit connected to a power converter with an alternating current output includes: a common mode choke connected to between any one terminal at an input side, an output side, or a direct current link of the power converter and input terminals of the alternating current circuit; and a connecting element that connects an outgoing line from a neutral point of the alternating current circuit to a reference potential point having little potential variation at an upstream of the common mode choke.
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