Patent ID: 9750166
Date: 2017-08-29
CPC Classifications: H01L,H02M,H05K

Claim:
1. An electric power converter comprising: a semiconductor stacked unit formed by stacking alternately a plurality of semiconductor modules with built-in semiconductor element therein and a plurality of cooling pipes for cooling the plurality of semiconductor module; auxiliary electronic components that form a power conversion circuit together with the semiconductor modules; a pressing member that presses the semiconductor stacked unit in a stacking direction; and a case that accommodates the semiconductor stacked unit, the auxiliary electronic components and the pressing member; wherein, the case has a front wall disposed on a front side in the stacking direction and a rear wall disposed on a rear side in the stacking direction, a pair of side walls that connect both ends of the case in a lateral direction, which is normal to the stacking direction, of the front wall and the rear wall, and inner walls disposed inside the front wall, the rear wall, and the pair of side walls; the inner walls include a partition wall that is disposed opposing the front wall, and a support wall that is formed so as to extend toward the rear wall from a rear end surface of the partition wall; wherein, a unit accommodation space for accommodating the semiconductor stacked unit and the pressing member is formed between the partition wall and the front wall; auxiliary accommodation spaces for accommodating the auxiliary electronic components are formed between the partition wall and the rear wall; and the support wall extends toward the rear wall from the rear end surface of the partition wall at an intermediate position of the partition wall that is between the one end of the partition wall and the other end of the partition wall.