POWER CONVERSION DEVICE

PROBLEM TO BE SOLVED: To provide a power conversion device that makes it possible to prevent a control circuit board from receiving thermal stress and prevent fastening force between a fastening member and a fastening object part from reducing.SOLUTION: A power conversion device 1 includes a control circuit board 2 and a board support member 3. The control circuit board 2 includes a fixing object part 21 to be fixed on the board support member 3 at each of a plurality of positions on the control circuit board 2. At least one of the plurality of fixing object parts 21 is fixed on the board support member 3 with a metal board fixing part 31, a metal fastening member 4, and an elastic member 5. The board fixing part 31 includes a fastening object part 311, a pressure contact surface 312, and a support surface 313. The fastening member 4 has a holding part 41 for holding the control circuit board 2 and the elastic member 5 between the holding part 41 and the support surface 313. Part of the fastening member 4 is inserted into an insertion hole 20 provided in the control circuit board 2. A gap 10 is formed between an inner wall surface 22 of the insertion hole 20 and the part of the fastening member 4 inserted into the insertion hole 20.SELECTED DRAWING: Figure 3 【課題】制御回路基板に熱応力がかかることを防止し、かつ、締結部材と被締結部との締結力が低下することを防ぐことができる電力変換装置を提供すること。【解決手段】電力変換装置１は、制御回路基板２と、基板支持部材３とを有する。制御回路基板２は、基板支持部材３に固定される被固定部２１を複数箇所に有する。複数の被固定部２１のうちの少なくとも１つは、金属製の基板固定部３１と、金属製の締結部材４と、弾性部材５とによって、基板支持部材３に固定されている。基板固定部３１は、被締結部３１１と、圧接面３１２と、支承面３１３とを有する。締結部材４は、支承面３１３との間に制御回路基板２及び弾性部材５を挟持する挟持部４１を有する。制御回路基板２に設けられた挿通孔２０に、締結部材４の一部が挿通されている。挿通孔２０の内壁面２２と、挿通孔２０に挿通された締結部材４との間には、隙間１０が形成されている。【選択図】図３