Denso Corporation

Kai Morimoto

Shinichi Miura

Hitoshi Imura

Gyokuto Mo

An electrical device such as a power control apparatus comprises a case and at least one electrical component accommodated in the case. The case has a flow path for a cooling fluid. The flow path is formed between a bottom portion and a cover. The flow path is elongated generally along a U shape. The bottom portion and the cover are joined by welding. The cover is formed with protruding portions protruding into the flow path. The protruding portions have shapes to reduce stress concentration on welding portions. A stress caused by a pressure of the cooling fluid may acts on a distal end formed inside of the U shape in a concentration manner.

Electrical device and case

An electric power converter apparatus includes a case. The case includes a case main body and a lower cover. A recess is formed at a main body floor of the case main body and is covered with the lower cover to form a floor passage. The floor passage includes an upstream passage and a downstream passage. The lower cover includes joint plate portions, a passage plate portion and beads. The joint plate portions are arranged side by side in a width direction of the floor passage while the floor passage is interposed between the joint plate portions. The passage plate portion extends over the joint plate portions in the width direction of the floor passage. Each bead is formed between the passage plate portion and a corresponding one of the joint plate portions and extends in an intersecting direction that intersects the passage plate portion.

Growing community of inventors

Kariya, Japan

Kai Morimoto