FILTER DEVICE AND POWER CONVERSION DEVICE

Abstract

Provided is a filter device including a π-type noise filter, and a metal case in which a first ground point and a second ground point are formed. The π-type noise filter includes a magnetic core configured to surround a direct current wiring, a first capacitor disposed in a stage preceding the magnetic core, a second capacitor disposed in a stage subsequent to the magnetic core, each of the first capacitor and the second capacitor connected to a corresponding one of the first ground point and the second ground point. A first partition and a second partition opposing each other are formed between the first ground point and the second ground point, and the first partition and the second partition have a predetermined gap between each other. Provided is a power conversion device including the filter device and a power conversion unit.

Description

Claims

1. A filter device comprising: a π-type noise filter; anda metal case in which a first ground point and a second ground point are formed;wherein the π-type noise filter includes: a magnetic core configured to surround a direct current wiring including a positive electrode wiring and a negative electrode wiring; a first capacitor disposed in a stage preceding the magnetic core and connected to the direct current wiring; and a second capacitor disposed in a stage subsequent to the magnetic core and connected to the direct current wiring, each of the first capacitor and the second capacitor connected to a corresponding one of the first ground point and the second ground point,a first partition and a second partition opposing each other are formed between the first ground point and the second ground point in the metal case, andthe first partition and the second partition have a predetermined gap between each other.

2. The filter device according to claim 1, comprising an insulation member between the first partition and the second partition.

3. The filter device according to claim 1, wherein the first partition has a surface opposing a surface of the second partition, the surfaces having areas equal to each other.

4. A power conversion device comprising: the filter device according to claim 1; anda power conversion unit configured to convert a direct current voltage to an alternating current voltage, the direct current voltage introduced by the filter device.