| CPC H02M 7/003 (2013.01) [H02M 1/14 (2013.01); H02P 27/06 (2013.01)] | 15 Claims |
|
1. A smoothing circuit for an inverter, the smoothing circuit comprising:
a parallel flat plate made of laminated busbar or thick copper substrate;
a plurality of capacitors arranged in a matrix and mounted on the parallel flat plate; and
a thermal conductive sheet interposed between the parallel flat plate and a housing in an area overlapping a mounting area of the plurality of capacitors when viewed along a normal direction of the parallel flat plate,
wherein adjacent terminals of adjacent capacitors have a same polarity by alternately arranging first posture capacitors within the capacitor going from a positive terminal to a negative terminal and second posture capacitors within the capacitor going from the negative terminal to the positive terminal in a predetermined direction, and
the adjacent terminals of the adjacent capacitors in a direction orthogonal to the predetermined direction have the same polarity by arranging the first posture capacitor in a direction orthogonal to the predetermined direction of the first posture capacitor, and the second posture capacitor in the direction orthogonal to the predetermined direction of the second posture capacitor, and
wherein the sheet piece having the relatively high thermal conductivity is disposed in an area near a connection portion where the parallel flat plate and a semiconductor module are connected, and the sheet piece having the relatively low thermal conductivity is disposed in an area away from the connection portion.
|