Power conversion apparatus
First to third capacitors each have an identical shape of a rectangular parallelepiped. The rectangular parallelepiped has a first surface with a first side and a second side, a second surface with the second side and a third side, and a third surface with the third side and the first side. The first side has a length not less than twice and less than three times a length of the third side. The first and second capacitors are arranged such that the first surfaces thereof are perpendicular to an installation surface, the first surfaces face each other, and the second surfaces are horizontal to the installation surface. The third capacitor is arranged such that the first surface thereof faces the second surfaces of the first and second capacitors and the third surface thereof is flush with the third surfaces of the first and second capacitors.
1. A power conversion apparatus comprising:
a direct-current (DC) circuit; and
a power converter including a plurality of switching elements, the power converter converting power between the DC circuit and an alternating-current (AC) circuit by a switching operation of the plurality of switching elements, wherein
the DC circuit includes a first capacitor, a second capacitor, and a third capacitor connected in parallel, and the first capacitor, the second capacitor, and the third capacitor each have an identical shape of a rectangular parallelepiped,
the rectangular parallelepiped has a pair of first surfaces facing each other, a pair of second surfaces facing each other, and a pair of third surfaces facing each other,
each of the pair of first surfaces has a first side and a second side orthogonal to each other, each of the pair of second surfaces has the second side and a third side orthogonal to each other, and each of the pair of third surfaces has the third side and the first side orthogonal to each other,
the first side has a length not less than twice and less than three times a length of the third side,
each of the first capacitor and the second capacitor is arranged such that the pair of first surfaces thereof are perpendicular to an installation surface and the pair of second surfaces thereof are horizontal to the installation surface,
one of the pair of first surfaces of the first capacitor faces one of the pair of first surfaces of the second capacitor while being spaced apart from each other, and
the third capacitor is arranged such that
one of the pair of first surfaces thereof faces one of the pair of second surfaces of the first capacitor and one of the pair of second surfaces of the second capacitor while being spaced apart from each other, and
one of the pair of third surfaces thereof is flush with one of the pair of third surfaces of the first capacitor and one of the pair of third surfaces of the second capacitor.
2. The power conversion apparatus according to claim 1 , wherein the third capacitor is arranged to be located vertically above the first capacitor and the second capacitor.
3. The power conversion apparatus according to claim 1 , wherein the third capacitor is arranged to be located vertically below the first capacitor and the second capacitor.
4. The power conversion apparatus according to claim 1 , wherein the power converter has an external shape of a rectangular parallelepiped, and is arranged to face one of the pair of third surfaces of the first capacitor, one of the pair of third surfaces of the second capacitor, and one of the pair of third surfaces of the third capacitor.
5. The power conversion apparatus according to claim 1 , wherein each of the first capacitor, the second capacitor, and the third capacitor is a film capacitor.