| 摘要 |
A filter device that suppresses electromagnetic interference generated in an alternating current circuit connected to a power converter with an alternating current output. This filter device 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 means 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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