Water cooled inverter

A water cooled inverter comprising:

• a water channel in which cooling water flows;
• a power circuit device on which a power semiconductor chip is mounted, the power circuit device being provided with a metallic body on its bottom surface;
• and
• a control circuit board for controlling said power circuit device, wherein
• a portion of said water channel for cooling said power circuit device is defined by a bottom surface of said metallic body and a part of the housing of said power circuit device,
• said cooling water directly contacts said metallic body, and
• there are at least two control circuit boards for controlling said power circuit device, which are provided above and below said power circuit device and the portion of said water channel for cooling said power circuit device, respectively.

A water cooled inverter comprising:

• a water channel in which cooling water flows;
• a power circuit device on which a power semiconductor chip is mounted, the power circuit device being provided with a metallic body on its bottom surface;
• at least two control circuit boards for controlling said power circuit device;
• and
• a top cover and bottom cover for covering the top and bottom of the inverter, respectively, wherein
• a housing of said power circuit device comprises a container constituting a water channel connected to the bottom surface of said power circuit device so that the cooling water directly contacts said bottom surface of said power circuit device, and a side wall surrounding said power circuit device, and at least one of said control circuit boards is housed in the bottom cover.