Power conversion device

摘要

The power conversion device includes a plurality of semiconductor modules, each having a main body section including a switching element therein. In a module unit, a positive module and a negative module are disposed such that main surfaces of the respective main body sections oppose each other. A positive terminal, a first intermediate terminal, a negative terminal, and a second intermediate terminal project in a Z direction perpendicular to X direction in which the positive module and the negative module oppose each other. A first vector V1 from the positive terminal towards the first intermediate terminal and a second vector V2 from the second intermediate terminal towards the negative terminal are configured such that these vector components V12 and V22 in a Y direction perpendicular to both the X and Z directions are opposite to each other.

主权项

1. A power conversion device, wherein the device comprises a plurality of semiconductor modules each having a plate-shaped body incorporated with a switching element,
wherein the plurality of semiconductor modules include a positive module connected to a positive side of a power supply and a negative module connected to a negative side of the power supply; the positive module includes a positive terminal connected to the power supply and a first intermediate terminal connected to the negative module, the positive terminal and the first intermediate terminal being projected from the body; the negative module includes a negative terminal connected to the power supply and a second intermediate terminal connected to the positive module, the negative terminal and the second intermediate terminal being projected from the body; the first intermediate terminal and the second intermediate terminal are connected to each other via an intermediate bus bar; the positive module and the negative module are arranged in a state where main surfaces of the respective bodies are opposed to each other, in a module unit composed of the positive module and the negative module adjacent to each other and connected to each other via the intermediate bus bar; the positive terminal, the first intermediate terminal, the negative terminal and the second intermediate terminal of both the positive and negative modules are projected into the same or a mutually opposite direction, the direction being a projecting direction perpendicular to a facing direction of the both; and a first vector directed to the first intermediate terminal from the positive terminal of the positive module and a second vector directed to the negative terminal from the second intermediate terminal of the negative module have respective vector components in a perpendicular direction that is perpendicular to the facing direction, the vector components being directed to mutually opposite directions when the module unit is seen from the projecting direction.