Power conversion apparatus

摘要

A power conversion apparatus includes a switching circuit including semiconductor switches, and a main circuit capacitor connected between a DC power source and the switching circuit. The main circuit capacitor includes a capacitor element, first wiring members that connect the DC power source to the switching circuit, and second wiring members that connect the capacitor element to the switching circuit. The capacitor element, the first wiring members, and the second wiring members are received in a case.

主权项

1. A power conversion apparatus comprising:
a switching circuit including switching element units each of which includes semiconductor switches; a main circuit capacitor connected between a DC power source and the switching circuit; and an output terminal block that outputs an AC voltage converted by the switching circuit, wherein the main circuit capacitor includes:
a capacitor element unit that includes capacitor elements;a first wiring member that includes positive and negative wiring members to connect the DC power source to the switching circuit; anda second wiring member that includes positive and negative wiring members to connect the capacitor element to the switching circuit, wherein the capacitor element unit, the first wiring member, and the second wiring member are received in a case, wherein the capacitor element unit is sandwiched between the positive and negative wiring members of the second wiring member, wherein each of the positive and negative members of the first wiring member includes first connection pieces that are connected to the respective switching element units and each of the positive and negative members of the second wiring member includes second connection pieces that are connected to the respective switching element units, wherein the first connection pieces and the second connection pieces form connection portions that correspond to the respective switching element units, and wherein a first current path that is a current path between the DC power source and the switching circuit and a second current path that is a current path between the capacitor element unit and the switching circuit are merged in the connection portions.