Abstract: A power conversion device includes a first solid pattern provided on a multi-layer wiring substrate and connected to a positive side of a first power supply, a second solid pattern provided on the multi-layer wiring substrate and connected to a negative side of the first power supply, and a third solid pattern provided on the multi-layer wiring substrate and connected to a negative side of a second power supply that is insulated from the first power supply. The first solid pattern and the third solid pattern are arranged so as to at least partially overlap in a first direction of the multi-layer wiring substrate, and the second solid pattern and the third solid pattern are arranged so as to at least partially overlap in the first direction of the multi-layer wiring substrate.

Abstract: An object is to obtain a power conversion device that can suppress the generation of noise due to coupling and achieve the size reduction of a substrate. In a power conversion device, a main circuit wire for connecting main circuit components to form a main circuit includes a first main circuit wire and a second main circuit wire wired so as to be separated from each other on a substrate. A control wire is wired between the first main circuit wire and the second main circuit wire so as to be insulated therefrom, and the first main circuit wire and the second main circuit wire are connected to each other via the main circuit component placed so as to be separated from the control wire in the thickness direction of the substrate.

Abstract: A power conversion device includes a power conversion unit for converting input power to output power; a connector for making connection to outside; a wire connected to the connector on one side and having a terminal on another side; and a first electric component connected to the terminal, wherein the first electric component is provided so as to overlap the wire as seen in a direction perpendicular to an extending direction of the wire.

Abstract: An object is to obtain a power conversion device that can suppress the generation of noise due to coupling and achieve the size reduction of a substrate. In a power conversion device, a main circuit wire for connecting main circuit components to form a main circuit includes a first main circuit wire and a second main circuit wire wired so as to be separated from each other on a substrate. A control wire is wired between the first main circuit wire and the second main circuit wire so as to be insulated therefrom, and the first main circuit wire and the second main circuit wire are connected to each other via the main circuit component placed so as to be separated from the control wire in the thickness direction of the substrate.