Power conversion device

A power conversion device, comprising:

• semiconductor modules forming a power conversion circuit including upper-and-lower arm circuits operable in three phases, the semiconductor modules including power terminals and midpoint terminals, the midpoint terminals forming midpoints of the upper-and-lower arm circuits;
• and
• midpoint conductors electrically connecting common-phase terminals of the midpoint terminals, wherein
• the semiconductor modules include
• first modules forming a first-phase circuit of the upper-and-lower arm circuits and successively arranged in a first direction so as to form a part of a first row of the semiconductor modules, the first row extending in the first direction,
• second modules forming a second-phase circuit of the upper-and-lower arm circuits and successively arranged in the first direction so as to form a part of a second row of the semiconductor modules, the second row extending in the first direction, the second modules facing the first modules in a second direction perpendicular to the first direction such that the first row and the second row are shifted from each other in the second direction, and
• third modules forming a third-phase circuit of the upper-and-lower arm circuits and arranged in the second direction such that at least one of the third modules forms a part of the first row and a rest of the third modules forms a part of the second row,
• the midpoint conductors include a first conductor electrically connecting midpoint terminals of the first modules, a second conductor electrically connecting midpoint terminals of the second modules, and a third conductor electrically connecting midpoint terminals of the third modules,
• semiconductor modules forming the first row have surfaces facing the second row and from which midpoint terminals protrude toward the second row,
• semiconductor modules forming the second row have surfaces facing the first row and from which midpoint terminals protrude toward the first row, and
• each of the midpoint conductors extends in the first direction from a connected portion of a corresponding midpoint terminal, the first direction being a direction from the third modules toward the first modules and the second modules.