公开(公告)号：US20230361691A1

公开(公告)日：2023-11-09

申请号：US18026526

申请日：2021-08-03

Applicant: Hitachi, Ltd.

Inventor： Ryou MOTEKI ,  Hisashi MOROOKA ,  Shintarou TAKEDA ,  Makoto ABE ,  Hiroshi KAMIZUMA ,  Kinya NAKATSU

IPC: H02M7/48 ,  H05K7/20

CPC classification number: H02M7/48 ,  H05K7/2089

Abstract: Please substitute the new Abstract submitted herewith for the original Abstract: This power conversion unit includes a cooling path positioned between an input-side power converter and an output-side power converter arranged separately on two sides that face each other. The input-side and output-side power converters include: a mold resin filled into a space on the inside of housings; a switching element covered by the mold resin, an upper electrode plate connected to the switching element, and a heat dissipation plate having insulating properties connected to the upper electrode plate; and a lower electrode provided near the cooling path. The mold resin is an organopolysiloxane having a three-dimensionally crosslinked structure after curing, in which the elastic modulus at room temperature is 0.1 MPa or greater, and the value when the hardness after curing is 10 or greater as measured using a durometer type E.